Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
m68k: merge m68k and m68knommu arch directories

arch/m68k/Kconfig

···
 config M68K
 	bool
 	default y
-	select HAVE_AOUT
 	select HAVE_IDE
-	select GENERIC_ATOMIC64
-
-config MMU
-	bool
-	default y
+	select HAVE_AOUT if MMU
+	select GENERIC_ATOMIC64 if MMU
+	select HAVE_GENERIC_HARDIRQS if !MMU
+	select GENERIC_HARDIRQS_NO_DEPRECATED if !MMU
 
 config RWSEM_GENERIC_SPINLOCK
 	bool
···
 	bool
 	default y
 
-config GENERIC_IOMAP
-	bool
-	default y
-
-config ARCH_MAY_HAVE_PC_FDC
-	bool
-	depends on BROKEN && (Q40 || SUN3X)
-	default y
-
 config NO_IOPORT
 	def_bool y
 
 config NO_DMA
-	def_bool SUN3
+	def_bool (MMU && SUN3) || (!MMU && !COLDFIRE)
 
+config ZONE_DMA
+	bool
+	default y
 config HZ
 	int
+	default 1000 if CLEOPATRA
 	default 100
-
-config ARCH_USES_GETTIMEOFFSET
-	def_bool y
 
 source "init/Kconfig"
 
 source "kernel/Kconfig.freezer"
 
+config MMU
+	bool "MMU-based Paged Memory Management Support"
+	default y
+	help
+	  Select if you want MMU-based virtualised addressing space
+	  support by paged memory management. If unsure, say 'Y'.
+
 menu "Platform dependent setup"
 
-config EISA
-	bool
-	---help---
-	  The Extended Industry Standard Architecture (EISA) bus was
-	  developed as an open alternative to the IBM MicroChannel bus.
-
-	  The EISA bus provided some of the features of the IBM MicroChannel
-	  bus while maintaining backward compatibility with cards made for
-	  the older ISA bus.  The EISA bus saw limited use between 1988 and
-	  1995 when it was made obsolete by the PCI bus.
-
-	  Say Y here if you are building a kernel for an EISA-based machine.
-
-	  Otherwise, say N.
-
-config MCA
-	bool
-	help
-	  MicroChannel Architecture is found in some IBM PS/2 machines and
-	  laptops.  It is a bus system similar to PCI or ISA. See
-	  <file:Documentation/mca.txt> (and especially the web page given
-	  there) before attempting to build an MCA bus kernel.
-
-config PCMCIA
-	tristate
-	---help---
-	  Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
-	  computer.  These are credit-card size devices such as network cards,
-	  modems or hard drives often used with laptops computers.  There are
-	  actually two varieties of these cards: the older 16 bit PCMCIA cards
-	  and the newer 32 bit CardBus cards.  If you want to use CardBus
-	  cards, you need to say Y here and also to "CardBus support" below.
-
-	  To use your PC-cards, you will need supporting software from David
-	  Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
-	  for location).  Please also read the PCMCIA-HOWTO, available from
-	  <http://www.tldp.org/docs.html#howto>.
-
-	  To compile this driver as modules, choose M here: the
-	  modules will be called pcmcia_core and ds.
-
-config AMIGA
-	bool "Amiga support"
-	select MMU_MOTOROLA if MMU
-	help
-	  This option enables support for the Amiga series of computers. If
-	  you plan to use this kernel on an Amiga, say Y here and browse the
-	  material available in <file:Documentation/m68k>; otherwise say N.
-
-config ATARI
-	bool "Atari support"
-	select MMU_MOTOROLA if MMU
-	help
-	  This option enables support for the 68000-based Atari series of
-	  computers (including the TT, Falcon and Medusa). If you plan to use
-	  this kernel on an Atari, say Y here and browse the material
-	  available in <file:Documentation/m68k>; otherwise say N.
-
-config MAC
-	bool "Macintosh support"
-	select MMU_MOTOROLA if MMU
-	help
-	  This option enables support for the Apple Macintosh series of
-	  computers (yes, there is experimental support now, at least for part
-	  of the series).
-
-	  Say N unless you're willing to code the remaining necessary support.
-	  ;)
-
-config NUBUS
-	bool
-	depends on MAC
-	default y
-
-config M68K_L2_CACHE
-	bool
-	depends on MAC
-	default y
-
-config APOLLO
-	bool "Apollo support"
-	select MMU_MOTOROLA if MMU
-	help
-	  Say Y here if you want to run Linux on an MC680x0-based Apollo
-	  Domain workstation such as the DN3500.
-
-config VME
-	bool "VME (Motorola and BVM) support"
-	select MMU_MOTOROLA if MMU
-	help
-	  Say Y here if you want to build a kernel for a 680x0 based VME
-	  board.  Boards currently supported include Motorola boards MVME147,
-	  MVME162, MVME166, MVME167, MVME172, and MVME177.  BVME4000 and
-	  BVME6000 boards from BVM Ltd are also supported.
-
-config MVME147
-	bool "MVME147 support"
-	depends on VME
-	help
-	  Say Y to include support for early Motorola VME boards.  This will
-	  build a kernel which can run on MVME147 single-board computers.  If
-	  you select this option you will have to select the appropriate
-	  drivers for SCSI, Ethernet and serial ports later on.
-
-config MVME16x
-	bool "MVME162, 166 and 167 support"
-	depends on VME
-	help
-	  Say Y to include support for Motorola VME boards.  This will build a
-	  kernel which can run on MVME162, MVME166, MVME167, MVME172, and
-	  MVME177 boards.  If you select this option you will have to select
-	  the appropriate drivers for SCSI, Ethernet and serial ports later
-	  on.
-
-config BVME6000
-	bool "BVME4000 and BVME6000 support"
-	depends on VME
-	help
-	  Say Y to include support for VME boards from BVM Ltd.  This will
-	  build a kernel which can run on BVME4000 and BVME6000 boards.  If
-	  you select this option you will have to select the appropriate
-	  drivers for SCSI, Ethernet and serial ports later on.
-
-config HP300
-	bool "HP9000/300 and HP9000/400 support"
-	select MMU_MOTOROLA if MMU
-	help
-	  This option enables support for the HP9000/300 and HP9000/400 series
-	  of workstations. Support for these machines is still somewhat
-	  experimental. If you plan to try to use the kernel on such a machine
-	  say Y here.
-	  Everybody else says N.
-
-config DIO
-	bool "DIO bus support"
-	depends on HP300
-	default y
-	help
-	  Say Y here to enable support for the "DIO" expansion bus used in
-	  HP300 machines. If you are using such a system you almost certainly
-	  want this.
-
-config SUN3X
-	bool "Sun3x support"
-	select MMU_MOTOROLA if MMU
-	select M68030
-	help
-	  This option enables support for the Sun 3x series of workstations.
-	  Be warned that this support is very experimental.
-	  Note that Sun 3x kernels are not compatible with Sun 3 hardware.
-	  General Linux information on the Sun 3x series (now discontinued)
-	  is at <http://www.angelfire.com/ca2/tech68k/sun3.html>.
-
-	  If you don't want to compile a kernel for a Sun 3x, say N.
-
-config Q40
-	bool "Q40/Q60 support"
-	select MMU_MOTOROLA if MMU
-	help
-	  The Q40 is a Motorola 68040-based successor to the Sinclair QL
-	  manufactured in Germany.  There is an official Q40 home page at
-	  <http://www.q40.de/>.  This option enables support for the Q40 and
-	  Q60. Select your CPU below.  For 68LC060 don't forget to enable FPU
-	  emulation.
-
-config SUN3
-	bool "Sun3 support"
-	depends on !MMU_MOTOROLA
-	select MMU_SUN3 if MMU
-	select M68020
-	help
-	  This option enables support for the Sun 3 series of workstations
-	  (3/50, 3/60, 3/1xx, 3/2xx systems). Enabling this option requires
-	  that all other hardware types must be disabled, as Sun 3 kernels
-	  are incompatible with all other m68k targets (including Sun 3x!).
-
-	  If you don't want to compile a kernel exclusively for a Sun 3, say N.
-
-config NATFEAT
-	bool "ARAnyM emulator support"
-	depends on ATARI
-	help
-	  This option enables support for ARAnyM native features, such as
-	  access to a disk image as /dev/hda.
-
-config NFBLOCK
-	tristate "NatFeat block device support"
-	depends on BLOCK && NATFEAT
-	help
-	  Say Y to include support for the ARAnyM NatFeat block device
-	  which allows direct access to the hard drives without using
-	  the hardware emulation.
-
-config NFCON
-	tristate "NatFeat console driver"
-	depends on NATFEAT
-	help
-	  Say Y to include support for the ARAnyM NatFeat console driver
-	  which allows the console output to be redirected to the stderr
-	  output of ARAnyM.
-
-config NFETH
-	tristate "NatFeat Ethernet support"
-	depends on NET_ETHERNET && NATFEAT
-	help
-	  Say Y to include support for the ARAnyM NatFeat network device
-	  which will emulate a regular ethernet device while presenting an
-	  ethertap device to the host system.
-
-comment "Processor type"
-
-config M68020
-	bool "68020 support"
-	help
-	  If you anticipate running this kernel on a computer with a MC68020
-	  processor, say Y. Otherwise, say N. Note that the 68020 requires a
-	  68851 MMU (Memory Management Unit) to run Linux/m68k, except on the
-	  Sun 3, which provides its own version.
-
-config M68030
-	bool "68030 support"
-	depends on !MMU_SUN3
-	help
-	  If you anticipate running this kernel on a computer with a MC68030
-	  processor, say Y. Otherwise, say N. Note that a MC68EC030 will not
-	  work, as it does not include an MMU (Memory Management Unit).
-
-config M68040
-	bool "68040 support"
-	depends on !MMU_SUN3
-	help
-	  If you anticipate running this kernel on a computer with a MC68LC040
-	  or MC68040 processor, say Y. Otherwise, say N. Note that an
-	  MC68EC040 will not work, as it does not include an MMU (Memory
-	  Management Unit).
-
-config M68060
-	bool "68060 support"
-	depends on !MMU_SUN3
-	help
-	  If you anticipate running this kernel on a computer with a MC68060
-	  processor, say Y. Otherwise, say N.
-
-config MMU_MOTOROLA
-	bool
-
-config MMU_SUN3
-	bool
-	depends on MMU && !MMU_MOTOROLA
-
-config M68KFPU_EMU
-	bool "Math emulation support (EXPERIMENTAL)"
-	depends on EXPERIMENTAL
-	help
-	  At some point in the future, this will cause floating-point math
-	  instructions to be emulated by the kernel on machines that lack a
-	  floating-point math coprocessor.  Thrill-seekers and chronically
-	  sleep-deprived psychotic hacker types can say Y now, everyone else
-	  should probably wait a while.
-
-config M68KFPU_EMU_EXTRAPREC
-	bool "Math emulation extra precision"
-	depends on M68KFPU_EMU
-	help
-	  The fpu uses normally a few bit more during calculations for
-	  correct rounding, the emulator can (often) do the same but this
-	  extra calculation can cost quite some time, so you can disable
-	  it here. The emulator will then "only" calculate with a 64 bit
-	  mantissa and round slightly incorrect, what is more than enough
-	  for normal usage.
-
-config M68KFPU_EMU_ONLY
-	bool "Math emulation only kernel"
-	depends on M68KFPU_EMU
-	help
-	  This option prevents any floating-point instructions from being
-	  compiled into the kernel, thereby the kernel doesn't save any
-	  floating point context anymore during task switches, so this
-	  kernel will only be usable on machines without a floating-point
-	  math coprocessor. This makes the kernel a bit faster as no tests
-	  needs to be executed whether a floating-point instruction in the
-	  kernel should be executed or not.
-
-config ADVANCED
-	bool "Advanced configuration options"
-	---help---
-	  This gives you access to some advanced options for the CPU. The
-	  defaults should be fine for most users, but these options may make
-	  it possible for you to improve performance somewhat if you know what
-	  you are doing.
-
-	  Note that the answer to this question won't directly affect the
-	  kernel: saying N will just cause the configurator to skip all
-	  the questions about these options.
-
-	  Most users should say N to this question.
-
-config RMW_INSNS
-	bool "Use read-modify-write instructions"
-	depends on ADVANCED
-	---help---
-	  This allows to use certain instructions that work with indivisible
-	  read-modify-write bus cycles. While this is faster than the
-	  workaround of disabling interrupts, it can conflict with DMA
-	  ( = direct memory access) on many Amiga systems, and it is also said
-	  to destabilize other machines. It is very likely that this will
-	  cause serious problems on any Amiga or Atari Medusa if set. The only
-	  configuration where it should work are 68030-based Ataris, where it
-	  apparently improves performance. But you've been warned! Unless you
-	  really know what you are doing, say N. Try Y only if you're quite
-	  adventurous.
-
-config SINGLE_MEMORY_CHUNK
-	bool "Use one physical chunk of memory only" if ADVANCED && !SUN3
-	default y if SUN3
-	select NEED_MULTIPLE_NODES
-	help
-	  Ignore all but the first contiguous chunk of physical memory for VM
-	  purposes.  This will save a few bytes kernel size and may speed up
-	  some operations.  Say N if not sure.
-
-config 060_WRITETHROUGH
-	bool "Use write-through caching for 68060 supervisor accesses"
-	depends on ADVANCED && M68060
-	---help---
-	  The 68060 generally uses copyback caching of recently accessed data.
-	  Copyback caching means that memory writes will be held in an on-chip
-	  cache and only written back to memory some time later.  Saying Y
-	  here will force supervisor (kernel) accesses to use writethrough
-	  caching.  Writethrough caching means that data is written to memory
-	  straight away, so that cache and memory data always agree.
-	  Writethrough caching is less efficient, but is needed for some
-	  drivers on 68060 based systems where the 68060 bus snooping signal
-	  is hardwired on.  The 53c710 SCSI driver is known to suffer from
-	  this problem.
-
-config ARCH_DISCONTIGMEM_ENABLE
-	def_bool !SINGLE_MEMORY_CHUNK
-
-config NODES_SHIFT
-	int
-	default "3"
-	depends on !SINGLE_MEMORY_CHUNK
+if MMU
+source arch/m68k/Kconfig.mmu
+endif
+if !MMU
+source arch/m68k/Kconfig.nommu
+endif
 
 source "mm/Kconfig"
 
 endmenu
 
-menu "General setup"
+menu "Executable file formats"
 
 source "fs/Kconfig.binfmt"
 
-config ZORRO
-	bool "Amiga Zorro (AutoConfig) bus support"
-	depends on AMIGA
-	help
-	  This enables support for the Zorro bus in the Amiga. If you have
-	  expansion cards in your Amiga that conform to the Amiga
-	  AutoConfig(tm) specification, say Y, otherwise N. Note that even
-	  expansion cards that do not fit in the Zorro slots but fit in e.g.
-	  the CPU slot may fall in this category, so you have to say Y to let
-	  Linux use these.
+endmenu
 
-config AMIGA_PCMCIA
-	bool "Amiga 1200/600 PCMCIA support (EXPERIMENTAL)"
-	depends on AMIGA && EXPERIMENTAL
-	help
-	  Include support in the kernel for pcmcia on Amiga 1200 and Amiga
-	  600. If you intend to use pcmcia cards say Y; otherwise say N.
+if !MMU
+menu "Power management options"
 
-config STRAM_PROC
-	bool "ST-RAM statistics in /proc"
-	depends on ATARI
-	help
-	  Say Y here to report ST-RAM usage statistics in /proc/stram.
-
-config HEARTBEAT
-	bool "Use power LED as a heartbeat" if AMIGA || APOLLO || ATARI || MAC ||Q40
-	default y if !AMIGA && !APOLLO && !ATARI && !MAC && !Q40 && HP300
-	help
-	  Use the power-on LED on your machine as a load meter.  The exact
-	  behavior is platform-dependent, but normally the flash frequency is
-	  a hyperbolic function of the 5-minute load average.
-
-# We have a dedicated heartbeat LED. :-)
-config PROC_HARDWARE
-	bool "/proc/hardware support"
-	help
-	  Say Y here to support the /proc/hardware file, which gives you
-	  access to information about the machine you're running on,
-	  including the model, CPU, MMU, clock speed, BogoMIPS rating,
-	  and memory size.
-
-config ISA
-	bool
-	depends on Q40 || AMIGA_PCMCIA
-	default y
-	help
-	  Find out whether you have ISA slots on your motherboard.  ISA is the
-	  name of a bus system, i.e. the way the CPU talks to the other stuff
-	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
-	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
-	  newer boards don't support it.  If you have ISA, say Y, otherwise N.
-
-config GENERIC_ISA_DMA
-	bool
-	depends on Q40 || AMIGA_PCMCIA
-	default y
-
-config ZONE_DMA
-	bool
-	default y
-
-source "drivers/pci/Kconfig"
-
-source "drivers/zorro/Kconfig"
+config PM
+        bool "Power Management support"
+        help
+          Support processor power management modes
 
 endmenu
+endif
 
 source "net/Kconfig"
 
 source "drivers/Kconfig"
+
+if MMU
 
 menu "Character devices"
 
···
 	  If unsure, say N.
 
 endmenu
+
+endif
 
 source "fs/Kconfig"
 

arch/m68k/Kconfig.debug

···
 
 source "lib/Kconfig.debug"
 
+if !MMU
+
+config FULLDEBUG
+	bool "Full Symbolic/Source Debugging support"
+	help
+	  Enable debugging symbols on kernel build.
+
+config HIGHPROFILE
+	bool "Use fast second timer for profiling"
+	depends on COLDFIRE
+	help
+	  Use a fast secondary clock to produce profiling information.
+
+config BOOTPARAM
+	bool 'Compiled-in Kernel Boot Parameter'
+
+config BOOTPARAM_STRING
+	string 'Kernel Boot Parameter'
+	default 'console=ttyS0,19200'
+	depends on BOOTPARAM
+
+config NO_KERNEL_MSG
+	bool "Suppress Kernel BUG Messages"
+	help
+	  Do not output any debug BUG messages within the kernel.
+
+config BDM_DISABLE
+	bool "Disable BDM signals"
+	depends on (EXPERIMENTAL && COLDFIRE)
+	help
+	  Disable the ColdFire CPU's BDM signals.
+
+endif
+
 endmenu

arch/m68k/Kconfig.mmu

···
+config GENERIC_IOMAP
+	bool
+	default y
+
+config ARCH_MAY_HAVE_PC_FDC
+	bool
+	depends on BROKEN && (Q40 || SUN3X)
+	default y
+
+config ARCH_USES_GETTIMEOFFSET
+	def_bool y
+
+config EISA
+	bool
+	---help---
+	  The Extended Industry Standard Architecture (EISA) bus was
+	  developed as an open alternative to the IBM MicroChannel bus.
+
+	  The EISA bus provided some of the features of the IBM MicroChannel
+	  bus while maintaining backward compatibility with cards made for
+	  the older ISA bus.  The EISA bus saw limited use between 1988 and
+	  1995 when it was made obsolete by the PCI bus.
+
+	  Say Y here if you are building a kernel for an EISA-based machine.
+
+	  Otherwise, say N.
+
+config MCA
+	bool
+	help
+	  MicroChannel Architecture is found in some IBM PS/2 machines and
+	  laptops.  It is a bus system similar to PCI or ISA. See
+	  <file:Documentation/mca.txt> (and especially the web page given
+	  there) before attempting to build an MCA bus kernel.
+
+config PCMCIA
+	tristate
+	---help---
+	  Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
+	  computer.  These are credit-card size devices such as network cards,
+	  modems or hard drives often used with laptops computers.  There are
+	  actually two varieties of these cards: the older 16 bit PCMCIA cards
+	  and the newer 32 bit CardBus cards.  If you want to use CardBus
+	  cards, you need to say Y here and also to "CardBus support" below.
+
+	  To use your PC-cards, you will need supporting software from David
+	  Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
+	  for location).  Please also read the PCMCIA-HOWTO, available from
+	  <http://www.tldp.org/docs.html#howto>.
+
+	  To compile this driver as modules, choose M here: the
+	  modules will be called pcmcia_core and ds.
+
+config AMIGA
+	bool "Amiga support"
+	select MMU_MOTOROLA if MMU
+	help
+	  This option enables support for the Amiga series of computers. If
+	  you plan to use this kernel on an Amiga, say Y here and browse the
+	  material available in <file:Documentation/m68k>; otherwise say N.
+
+config ATARI
+	bool "Atari support"
+	select MMU_MOTOROLA if MMU
+	help
+	  This option enables support for the 68000-based Atari series of
+	  computers (including the TT, Falcon and Medusa). If you plan to use
+	  this kernel on an Atari, say Y here and browse the material
+	  available in <file:Documentation/m68k>; otherwise say N.
+
+config MAC
+	bool "Macintosh support"
+	select MMU_MOTOROLA if MMU
+	help
+	  This option enables support for the Apple Macintosh series of
+	  computers (yes, there is experimental support now, at least for part
+	  of the series).
+
+	  Say N unless you're willing to code the remaining necessary support.
+	  ;)
+
+config NUBUS
+	bool
+	depends on MAC
+	default y
+
+config M68K_L2_CACHE
+	bool
+	depends on MAC
+	default y
+
+config APOLLO
+	bool "Apollo support"
+	select MMU_MOTOROLA if MMU
+	help
+	  Say Y here if you want to run Linux on an MC680x0-based Apollo
+	  Domain workstation such as the DN3500.
+
+config VME
+	bool "VME (Motorola and BVM) support"
+	select MMU_MOTOROLA if MMU
+	help
+	  Say Y here if you want to build a kernel for a 680x0 based VME
+	  board.  Boards currently supported include Motorola boards MVME147,
+	  MVME162, MVME166, MVME167, MVME172, and MVME177.  BVME4000 and
+	  BVME6000 boards from BVM Ltd are also supported.
+
+config MVME147
+	bool "MVME147 support"
+	depends on VME
+	help
+	  Say Y to include support for early Motorola VME boards.  This will
+	  build a kernel which can run on MVME147 single-board computers.  If
+	  you select this option you will have to select the appropriate
+	  drivers for SCSI, Ethernet and serial ports later on.
+
+config MVME16x
+	bool "MVME162, 166 and 167 support"
+	depends on VME
+	help
+	  Say Y to include support for Motorola VME boards.  This will build a
+	  kernel which can run on MVME162, MVME166, MVME167, MVME172, and
+	  MVME177 boards.  If you select this option you will have to select
+	  the appropriate drivers for SCSI, Ethernet and serial ports later
+	  on.
+
+config BVME6000
+	bool "BVME4000 and BVME6000 support"
+	depends on VME
+	help
+	  Say Y to include support for VME boards from BVM Ltd.  This will
+	  build a kernel which can run on BVME4000 and BVME6000 boards.  If
+	  you select this option you will have to select the appropriate
+	  drivers for SCSI, Ethernet and serial ports later on.
+
+config HP300
+	bool "HP9000/300 and HP9000/400 support"
+	select MMU_MOTOROLA if MMU
+	help
+	  This option enables support for the HP9000/300 and HP9000/400 series
+	  of workstations. Support for these machines is still somewhat
+	  experimental. If you plan to try to use the kernel on such a machine
+	  say Y here.
+	  Everybody else says N.
+
+config DIO
+	bool "DIO bus support"
+	depends on HP300
+	default y
+	help
+	  Say Y here to enable support for the "DIO" expansion bus used in
+	  HP300 machines. If you are using such a system you almost certainly
+	  want this.
+
+config SUN3X
+	bool "Sun3x support"
+	select MMU_MOTOROLA if MMU
+	select M68030
+	help
+	  This option enables support for the Sun 3x series of workstations.
+	  Be warned that this support is very experimental.
+	  Note that Sun 3x kernels are not compatible with Sun 3 hardware.
+	  General Linux information on the Sun 3x series (now discontinued)
+	  is at <http://www.angelfire.com/ca2/tech68k/sun3.html>.
+
+	  If you don't want to compile a kernel for a Sun 3x, say N.
+
+config Q40
+	bool "Q40/Q60 support"
+	select MMU_MOTOROLA if MMU
+	help
+	  The Q40 is a Motorola 68040-based successor to the Sinclair QL
+	  manufactured in Germany.  There is an official Q40 home page at
+	  <http://www.q40.de/>.  This option enables support for the Q40 and
+	  Q60. Select your CPU below.  For 68LC060 don't forget to enable FPU
+	  emulation.
+
+config SUN3
+	bool "Sun3 support"
+	depends on !MMU_MOTOROLA
+	select MMU_SUN3 if MMU
+	select M68020
+	help
+	  This option enables support for the Sun 3 series of workstations
+	  (3/50, 3/60, 3/1xx, 3/2xx systems). Enabling this option requires
+	  that all other hardware types must be disabled, as Sun 3 kernels
+	  are incompatible with all other m68k targets (including Sun 3x!).
+
+	  If you don't want to compile a kernel exclusively for a Sun 3, say N.
+
+config NATFEAT
+	bool "ARAnyM emulator support"
+	depends on ATARI
+	help
+	  This option enables support for ARAnyM native features, such as
+	  access to a disk image as /dev/hda.
+
+config NFBLOCK
+	tristate "NatFeat block device support"
+	depends on BLOCK && NATFEAT
+	help
+	  Say Y to include support for the ARAnyM NatFeat block device
+	  which allows direct access to the hard drives without using
+	  the hardware emulation.
+
+config NFCON
+	tristate "NatFeat console driver"
+	depends on NATFEAT
+	help
+	  Say Y to include support for the ARAnyM NatFeat console driver
+	  which allows the console output to be redirected to the stderr
+	  output of ARAnyM.
+
+config NFETH
+	tristate "NatFeat Ethernet support"
+	depends on NET_ETHERNET && NATFEAT
+	help
+	  Say Y to include support for the ARAnyM NatFeat network device
+	  which will emulate a regular ethernet device while presenting an
+	  ethertap device to the host system.
+
+comment "Processor type"
+
+config M68020
+	bool "68020 support"
+	help
+	  If you anticipate running this kernel on a computer with a MC68020
+	  processor, say Y. Otherwise, say N. Note that the 68020 requires a
+	  68851 MMU (Memory Management Unit) to run Linux/m68k, except on the
+	  Sun 3, which provides its own version.
+
+config M68030
+	bool "68030 support"
+	depends on !MMU_SUN3
+	help
+	  If you anticipate running this kernel on a computer with a MC68030
+	  processor, say Y. Otherwise, say N. Note that a MC68EC030 will not
+	  work, as it does not include an MMU (Memory Management Unit).
+
+config M68040
+	bool "68040 support"
+	depends on !MMU_SUN3
+	help
+	  If you anticipate running this kernel on a computer with a MC68LC040
+	  or MC68040 processor, say Y. Otherwise, say N. Note that an
+	  MC68EC040 will not work, as it does not include an MMU (Memory
+	  Management Unit).
+
+config M68060
+	bool "68060 support"
+	depends on !MMU_SUN3
+	help
+	  If you anticipate running this kernel on a computer with a MC68060
+	  processor, say Y. Otherwise, say N.
+
+config MMU_MOTOROLA
+	bool
+
+config MMU_SUN3
+	bool
+	depends on MMU && !MMU_MOTOROLA
+
+config M68KFPU_EMU
+	bool "Math emulation support (EXPERIMENTAL)"
+	depends on EXPERIMENTAL
+	help
+	  At some point in the future, this will cause floating-point math
+	  instructions to be emulated by the kernel on machines that lack a
+	  floating-point math coprocessor.  Thrill-seekers and chronically
+	  sleep-deprived psychotic hacker types can say Y now, everyone else
+	  should probably wait a while.
+
+config M68KFPU_EMU_EXTRAPREC
+	bool "Math emulation extra precision"
+	depends on M68KFPU_EMU
+	help
+	  The fpu uses normally a few bit more during calculations for
+	  correct rounding, the emulator can (often) do the same but this
+	  extra calculation can cost quite some time, so you can disable
+	  it here. The emulator will then "only" calculate with a 64 bit
+	  mantissa and round slightly incorrect, what is more than enough
+	  for normal usage.
+
+config M68KFPU_EMU_ONLY
+	bool "Math emulation only kernel"
+	depends on M68KFPU_EMU
+	help
+	  This option prevents any floating-point instructions from being
+	  compiled into the kernel, thereby the kernel doesn't save any
+	  floating point context anymore during task switches, so this
+	  kernel will only be usable on machines without a floating-point
+	  math coprocessor. This makes the kernel a bit faster as no tests
+	  needs to be executed whether a floating-point instruction in the
+	  kernel should be executed or not.
+
+config ADVANCED
+	bool "Advanced configuration options"
+	---help---
+	  This gives you access to some advanced options for the CPU. The
+	  defaults should be fine for most users, but these options may make
+	  it possible for you to improve performance somewhat if you know what
+	  you are doing.
+
+	  Note that the answer to this question won't directly affect the
+	  kernel: saying N will just cause the configurator to skip all
+	  the questions about these options.
+
+	  Most users should say N to this question.
+
+config RMW_INSNS
+	bool "Use read-modify-write instructions"
+	depends on ADVANCED
+	---help---
+	  This allows to use certain instructions that work with indivisible
+	  read-modify-write bus cycles. While this is faster than the
+	  workaround of disabling interrupts, it can conflict with DMA
+	  ( = direct memory access) on many Amiga systems, and it is also said
+	  to destabilize other machines. It is very likely that this will
+	  cause serious problems on any Amiga or Atari Medusa if set. The only
+	  configuration where it should work are 68030-based Ataris, where it
+	  apparently improves performance. But you've been warned! Unless you
+	  really know what you are doing, say N. Try Y only if you're quite
+	  adventurous.
+
+config SINGLE_MEMORY_CHUNK
+	bool "Use one physical chunk of memory only" if ADVANCED && !SUN3
+	default y if SUN3
+	select NEED_MULTIPLE_NODES
+	help
+	  Ignore all but the first contiguous chunk of physical memory for VM
+	  purposes.  This will save a few bytes kernel size and may speed up
+	  some operations.  Say N if not sure.
+
+config 060_WRITETHROUGH
+	bool "Use write-through caching for 68060 supervisor accesses"
+	depends on ADVANCED && M68060
+	---help---
+	  The 68060 generally uses copyback caching of recently accessed data.
+	  Copyback caching means that memory writes will be held in an on-chip
+	  cache and only written back to memory some time later.  Saying Y
+	  here will force supervisor (kernel) accesses to use writethrough
+	  caching.  Writethrough caching means that data is written to memory
+	  straight away, so that cache and memory data always agree.
+	  Writethrough caching is less efficient, but is needed for some
+	  drivers on 68060 based systems where the 68060 bus snooping signal
+	  is hardwired on.  The 53c710 SCSI driver is known to suffer from
+	  this problem.
+
+config ARCH_DISCONTIGMEM_ENABLE
+	def_bool !SINGLE_MEMORY_CHUNK
+
+config NODES_SHIFT
+	int
+	default "3"
+	depends on !SINGLE_MEMORY_CHUNK
+
+config ZORRO
+	bool "Amiga Zorro (AutoConfig) bus support"
+	depends on AMIGA
+	help
+	  This enables support for the Zorro bus in the Amiga. If you have
+	  expansion cards in your Amiga that conform to the Amiga
+	  AutoConfig(tm) specification, say Y, otherwise N. Note that even
+	  expansion cards that do not fit in the Zorro slots but fit in e.g.
+	  the CPU slot may fall in this category, so you have to say Y to let
+	  Linux use these.
+
+config AMIGA_PCMCIA
+	bool "Amiga 1200/600 PCMCIA support (EXPERIMENTAL)"
+	depends on AMIGA && EXPERIMENTAL
+	help
+	  Include support in the kernel for pcmcia on Amiga 1200 and Amiga
+	  600. If you intend to use pcmcia cards say Y; otherwise say N.
+
+config STRAM_PROC
+	bool "ST-RAM statistics in /proc"
+	depends on ATARI
+	help
+	  Say Y here to report ST-RAM usage statistics in /proc/stram.
+
+config HEARTBEAT
+	bool "Use power LED as a heartbeat" if AMIGA || APOLLO || ATARI || MAC ||Q40
+	default y if !AMIGA && !APOLLO && !ATARI && !MAC && !Q40 && HP300
+	help
+	  Use the power-on LED on your machine as a load meter.  The exact
+	  behavior is platform-dependent, but normally the flash frequency is
+	  a hyperbolic function of the 5-minute load average.
+
+# We have a dedicated heartbeat LED. :-)
+config PROC_HARDWARE
+	bool "/proc/hardware support"
+	help
+	  Say Y here to support the /proc/hardware file, which gives you
+	  access to information about the machine you're running on,
+	  including the model, CPU, MMU, clock speed, BogoMIPS rating,
+	  and memory size.
+
+config ISA
+	bool
+	depends on Q40 || AMIGA_PCMCIA
+	default y
+	help
+	  Find out whether you have ISA slots on your motherboard.  ISA is the
+	  name of a bus system, i.e. the way the CPU talks to the other stuff
+	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
+	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
+	  newer boards don't support it.  If you have ISA, say Y, otherwise N.
+
+config GENERIC_ISA_DMA
+	bool
+	depends on Q40 || AMIGA_PCMCIA
+	default y
+
+source "drivers/pci/Kconfig"
+
+source "drivers/zorro/Kconfig"
+

arch/m68k/Makefile

···
-#
-# m68k/Makefile
-#
-# This file is included by the global makefile so that you can add your own
-# architecture-specific flags and dependencies. Remember to do have actions
-# for "archclean" and "archdep" for cleaning up and making dependencies for
-# this architecture
-#
-# This file is subject to the terms and conditions of the GNU General Public
-# License.  See the file "COPYING" in the main directory of this archive
-# for more details.
-#
-# Copyright (C) 1994 by Hamish Macdonald
-#
-
 KBUILD_DEFCONFIG := multi_defconfig
 
-# override top level makefile
-AS += -m68020
-LDFLAGS := -m m68kelf
-KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/m68k/kernel/module.lds
-ifneq ($(SUBARCH),$(ARCH))
-	ifeq ($(CROSS_COMPILE),)
-		CROSS_COMPILE := $(call cc-cross-prefix, \
-			m68k-linux-gnu- m68k-linux- m68k-unknown-linux-gnu-)
-	endif
-endif
-
-ifdef CONFIG_SUN3
-LDFLAGS_vmlinux = -N
-endif
-
-CHECKFLAGS += -D__mc68000__
-
-# without -fno-strength-reduce the 53c7xx.c driver fails ;-(
-KBUILD_CFLAGS += -pipe -fno-strength-reduce -ffixed-a2
-
-# enable processor switch if compiled only for a single cpu
-ifndef CONFIG_M68020
-ifndef CONFIG_M68030
-
-ifndef CONFIG_M68060
-KBUILD_CFLAGS += -m68040
-endif
-
-ifndef CONFIG_M68040
-KBUILD_CFLAGS += -m68060
-endif
-
-endif
-endif
-
-ifdef CONFIG_KGDB
-# If configured for kgdb support, include debugging infos and keep the
-# frame pointer
-KBUILD_CFLAGS := $(subst -fomit-frame-pointer,,$(KBUILD_CFLAGS)) -g
-endif
-
-ifndef CONFIG_SUN3
-head-y := arch/m68k/kernel/head.o
+ifdef CONFIG_MMU
+include $(srctree)/arch/m68k/Makefile_mm
 else
-head-y := arch/m68k/kernel/sun3-head.o
+include $(srctree)/arch/m68k/Makefile_no
 endif
-
-core-y				+= arch/m68k/kernel/	arch/m68k/mm/
-libs-y				+= arch/m68k/lib/
-
-core-$(CONFIG_Q40)		+= arch/m68k/q40/
-core-$(CONFIG_AMIGA)		+= arch/m68k/amiga/
-core-$(CONFIG_ATARI)		+= arch/m68k/atari/
-core-$(CONFIG_MAC)		+= arch/m68k/mac/
-core-$(CONFIG_HP300)		+= arch/m68k/hp300/
-core-$(CONFIG_APOLLO)		+= arch/m68k/apollo/
-core-$(CONFIG_MVME147)		+= arch/m68k/mvme147/
-core-$(CONFIG_MVME16x)		+= arch/m68k/mvme16x/
-core-$(CONFIG_BVME6000)		+= arch/m68k/bvme6000/
-core-$(CONFIG_SUN3X)		+= arch/m68k/sun3x/	arch/m68k/sun3/
-core-$(CONFIG_SUN3)		+= arch/m68k/sun3/	arch/m68k/sun3/prom/
-core-$(CONFIG_NATFEAT)		+= arch/m68k/emu/
-core-$(CONFIG_M68040)		+= arch/m68k/fpsp040/
-core-$(CONFIG_M68060)		+= arch/m68k/ifpsp060/
-core-$(CONFIG_M68KFPU_EMU)	+= arch/m68k/math-emu/
-
-all:	zImage
-
-lilo:	vmlinux
-	if [ -f $(INSTALL_PATH)/vmlinux ]; then mv -f $(INSTALL_PATH)/vmlinux $(INSTALL_PATH)/vmlinux.old; fi
-	if [ -f $(INSTALL_PATH)/System.map ]; then mv -f $(INSTALL_PATH)/System.map $(INSTALL_PATH)/System.old; fi
-	cat vmlinux > $(INSTALL_PATH)/vmlinux
-	cp System.map $(INSTALL_PATH)/System.map
-	if [ -x /sbin/lilo ]; then /sbin/lilo; else /etc/lilo/install; fi
-
-zImage compressed: vmlinux.gz
-
-vmlinux.gz: vmlinux
-
-ifndef CONFIG_KGDB
-	cp vmlinux vmlinux.tmp
-	$(STRIP) vmlinux.tmp
-	gzip -9c vmlinux.tmp >vmlinux.gz
-	rm vmlinux.tmp
-else
-	gzip -9c vmlinux >vmlinux.gz
-endif
-
-bzImage: vmlinux.bz2
-
-vmlinux.bz2: vmlinux
-
-ifndef CONFIG_KGDB
-	cp vmlinux vmlinux.tmp
-	$(STRIP) vmlinux.tmp
-	bzip2 -1c vmlinux.tmp >vmlinux.bz2
-	rm vmlinux.tmp
-else
-	bzip2 -1c vmlinux >vmlinux.bz2
-endif
-
-archclean:
-	rm -f vmlinux.gz vmlinux.bz2
-
-install:
-	sh $(srctree)/arch/m68k/install.sh $(KERNELRELEASE) vmlinux.gz System.map "$(INSTALL_PATH)"

arch/m68k/Makefile_mm

···
+#
+# m68k/Makefile
+#
+# This file is included by the global makefile so that you can add your own
+# architecture-specific flags and dependencies. Remember to do have actions
+# for "archclean" and "archdep" for cleaning up and making dependencies for
+# this architecture
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+# Copyright (C) 1994 by Hamish Macdonald
+#
+
+# override top level makefile
+AS += -m68020
+LDFLAGS := -m m68kelf
+KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/m68k/kernel/module.lds
+ifneq ($(SUBARCH),$(ARCH))
+	ifeq ($(CROSS_COMPILE),)
+		CROSS_COMPILE := $(call cc-cross-prefix, \
+			m68k-linux-gnu- m68k-linux- m68k-unknown-linux-gnu-)
+	endif
+endif
+
+ifdef CONFIG_SUN3
+LDFLAGS_vmlinux = -N
+endif
+
+CHECKFLAGS += -D__mc68000__
+
+# without -fno-strength-reduce the 53c7xx.c driver fails ;-(
+KBUILD_CFLAGS += -pipe -fno-strength-reduce -ffixed-a2
+
+# enable processor switch if compiled only for a single cpu
+ifndef CONFIG_M68020
+ifndef CONFIG_M68030
+
+ifndef CONFIG_M68060
+KBUILD_CFLAGS += -m68040
+endif
+
+ifndef CONFIG_M68040
+KBUILD_CFLAGS += -m68060
+endif
+
+endif
+endif
+
+ifdef CONFIG_KGDB
+# If configured for kgdb support, include debugging infos and keep the
+# frame pointer
+KBUILD_CFLAGS := $(subst -fomit-frame-pointer,,$(KBUILD_CFLAGS)) -g
+endif
+
+ifndef CONFIG_SUN3
+head-y := arch/m68k/kernel/head.o
+else
+head-y := arch/m68k/kernel/sun3-head.o
+endif
+
+core-y				+= arch/m68k/kernel/	arch/m68k/mm/
+libs-y				+= arch/m68k/lib/
+
+core-$(CONFIG_Q40)		+= arch/m68k/q40/
+core-$(CONFIG_AMIGA)		+= arch/m68k/amiga/
+core-$(CONFIG_ATARI)		+= arch/m68k/atari/
+core-$(CONFIG_MAC)		+= arch/m68k/mac/
+core-$(CONFIG_HP300)		+= arch/m68k/hp300/
+core-$(CONFIG_APOLLO)		+= arch/m68k/apollo/
+core-$(CONFIG_MVME147)		+= arch/m68k/mvme147/
+core-$(CONFIG_MVME16x)		+= arch/m68k/mvme16x/
+core-$(CONFIG_BVME6000)		+= arch/m68k/bvme6000/
+core-$(CONFIG_SUN3X)		+= arch/m68k/sun3x/	arch/m68k/sun3/
+core-$(CONFIG_SUN3)		+= arch/m68k/sun3/	arch/m68k/sun3/prom/
+core-$(CONFIG_NATFEAT)		+= arch/m68k/emu/
+core-$(CONFIG_M68040)		+= arch/m68k/fpsp040/
+core-$(CONFIG_M68060)		+= arch/m68k/ifpsp060/
+core-$(CONFIG_M68KFPU_EMU)	+= arch/m68k/math-emu/
+
+all:	zImage
+
+lilo:	vmlinux
+	if [ -f $(INSTALL_PATH)/vmlinux ]; then mv -f $(INSTALL_PATH)/vmlinux $(INSTALL_PATH)/vmlinux.old; fi
+	if [ -f $(INSTALL_PATH)/System.map ]; then mv -f $(INSTALL_PATH)/System.map $(INSTALL_PATH)/System.old; fi
+	cat vmlinux > $(INSTALL_PATH)/vmlinux
+	cp System.map $(INSTALL_PATH)/System.map
+	if [ -x /sbin/lilo ]; then /sbin/lilo; else /etc/lilo/install; fi
+
+zImage compressed: vmlinux.gz
+
+vmlinux.gz: vmlinux
+
+ifndef CONFIG_KGDB
+	cp vmlinux vmlinux.tmp
+	$(STRIP) vmlinux.tmp
+	gzip -9c vmlinux.tmp >vmlinux.gz
+	rm vmlinux.tmp
+else
+	gzip -9c vmlinux >vmlinux.gz
+endif
+
+bzImage: vmlinux.bz2
+
+vmlinux.bz2: vmlinux
+
+ifndef CONFIG_KGDB
+	cp vmlinux vmlinux.tmp
+	$(STRIP) vmlinux.tmp
+	bzip2 -1c vmlinux.tmp >vmlinux.bz2
+	rm vmlinux.tmp
+else
+	bzip2 -1c vmlinux >vmlinux.bz2
+endif
+
+archclean:
+	rm -f vmlinux.gz vmlinux.bz2
+
+install:
+	sh $(srctree)/arch/m68k/install.sh $(KERNELRELEASE) vmlinux.gz System.map "$(INSTALL_PATH)"

arch/m68k/kernel/Makefile

···
-#
-# Makefile for the linux kernel.
-#
-
-ifndef CONFIG_SUN3
-  extra-y := head.o
+ifdef CONFIG_MMU
+include arch/m68k/kernel/Makefile_mm
 else
-  extra-y := sun3-head.o
+include arch/m68k/kernel/Makefile_no
 endif
-extra-y	+= vmlinux.lds
-
-obj-y	:= entry.o process.o traps.o ints.o signal.o ptrace.o module.o \
-	   sys_m68k.o time.o setup.o m68k_ksyms.o devres.o
-
-devres-y = ../../../kernel/irq/devres.o
-
-obj-y$(CONFIG_MMU_SUN3) += dma.o	# no, it's not a typo

arch/m68k/kernel/Makefile_mm

···
+#
+# Makefile for the linux kernel.
+#
+
+ifndef CONFIG_SUN3
+  extra-y := head.o
+else
+  extra-y := sun3-head.o
+endif
+extra-y	+= vmlinux.lds
+
+obj-y	:= entry.o process.o traps.o ints.o signal.o ptrace.o module.o \
+	   sys_m68k.o time.o setup.o m68k_ksyms.o devres.o
+
+devres-y = ../../../kernel/irq/devres.o
+
+obj-y$(CONFIG_MMU_SUN3) += dma.o	# no, it's not a typo

arch/m68k/kernel/asm-offsets.c

···
-/*
- * This program is used to generate definitions needed by
- * assembly language modules.
- *
- * We use the technique used in the OSF Mach kernel code:
- * generate asm statements containing #defines,
- * compile this file to assembler, and then extract the
- * #defines from the assembly-language output.
- */
-
-#define ASM_OFFSETS_C
-
-#include <linux/stddef.h>
-#include <linux/sched.h>
-#include <linux/kernel_stat.h>
-#include <linux/kbuild.h>
-#include <asm/bootinfo.h>
-#include <asm/irq.h>
-#include <asm/amigahw.h>
-#include <linux/font.h>
-
-int main(void)
-{
-	/* offsets into the task struct */
-	DEFINE(TASK_THREAD, offsetof(struct task_struct, thread));
-	DEFINE(TASK_INFO, offsetof(struct task_struct, thread.info));
-	DEFINE(TASK_MM, offsetof(struct task_struct, mm));
 #ifdef CONFIG_MMU
-	DEFINE(TASK_TINFO, offsetof(struct task_struct, thread.info));
+#include "asm-offsets_mm.c"
+#else
+#include "asm-offsets_no.c"
 #endif
-
-	/* offsets into the thread struct */
-	DEFINE(THREAD_KSP, offsetof(struct thread_struct, ksp));
-	DEFINE(THREAD_USP, offsetof(struct thread_struct, usp));
-	DEFINE(THREAD_SR, offsetof(struct thread_struct, sr));
-	DEFINE(THREAD_FS, offsetof(struct thread_struct, fs));
-	DEFINE(THREAD_CRP, offsetof(struct thread_struct, crp));
-	DEFINE(THREAD_ESP0, offsetof(struct thread_struct, esp0));
-	DEFINE(THREAD_FPREG, offsetof(struct thread_struct, fp));
-	DEFINE(THREAD_FPCNTL, offsetof(struct thread_struct, fpcntl));
-	DEFINE(THREAD_FPSTATE, offsetof(struct thread_struct, fpstate));
-
-	/* offsets into the thread_info struct */
-	DEFINE(TINFO_PREEMPT, offsetof(struct thread_info, preempt_count));
-	DEFINE(TINFO_FLAGS, offsetof(struct thread_info, flags));
-
-	/* offsets into the pt_regs */
-	DEFINE(PT_OFF_D0, offsetof(struct pt_regs, d0));
-	DEFINE(PT_OFF_ORIG_D0, offsetof(struct pt_regs, orig_d0));
-	DEFINE(PT_OFF_D1, offsetof(struct pt_regs, d1));
-	DEFINE(PT_OFF_D2, offsetof(struct pt_regs, d2));
-	DEFINE(PT_OFF_D3, offsetof(struct pt_regs, d3));
-	DEFINE(PT_OFF_D4, offsetof(struct pt_regs, d4));
-	DEFINE(PT_OFF_D5, offsetof(struct pt_regs, d5));
-	DEFINE(PT_OFF_A0, offsetof(struct pt_regs, a0));
-	DEFINE(PT_OFF_A1, offsetof(struct pt_regs, a1));
-	DEFINE(PT_OFF_A2, offsetof(struct pt_regs, a2));
-	DEFINE(PT_OFF_PC, offsetof(struct pt_regs, pc));
-	DEFINE(PT_OFF_SR, offsetof(struct pt_regs, sr));
-	/* bitfields are a bit difficult */
-	DEFINE(PT_OFF_FORMATVEC, offsetof(struct pt_regs, pc) + 4);
-
-	/* offsets into the irq_cpustat_t struct */
-	DEFINE(CPUSTAT_SOFTIRQ_PENDING, offsetof(irq_cpustat_t, __softirq_pending));
-
-	/* offsets into the bi_record struct */
-	DEFINE(BIR_TAG, offsetof(struct bi_record, tag));
-	DEFINE(BIR_SIZE, offsetof(struct bi_record, size));
-	DEFINE(BIR_DATA, offsetof(struct bi_record, data));
-
-	/* offsets into font_desc (drivers/video/console/font.h) */
-	DEFINE(FONT_DESC_IDX, offsetof(struct font_desc, idx));
-	DEFINE(FONT_DESC_NAME, offsetof(struct font_desc, name));
-	DEFINE(FONT_DESC_WIDTH, offsetof(struct font_desc, width));
-	DEFINE(FONT_DESC_HEIGHT, offsetof(struct font_desc, height));
-	DEFINE(FONT_DESC_DATA, offsetof(struct font_desc, data));
-	DEFINE(FONT_DESC_PREF, offsetof(struct font_desc, pref));
-
-	/* signal defines */
-	DEFINE(LSIGSEGV, SIGSEGV);
-	DEFINE(LSEGV_MAPERR, SEGV_MAPERR);
-	DEFINE(LSIGTRAP, SIGTRAP);
-	DEFINE(LTRAP_TRACE, TRAP_TRACE);
-
-	/* offsets into the custom struct */
-	DEFINE(CUSTOMBASE, &amiga_custom);
-	DEFINE(C_INTENAR, offsetof(struct CUSTOM, intenar));
-	DEFINE(C_INTREQR, offsetof(struct CUSTOM, intreqr));
-	DEFINE(C_INTENA, offsetof(struct CUSTOM, intena));
-	DEFINE(C_INTREQ, offsetof(struct CUSTOM, intreq));
-	DEFINE(C_SERDATR, offsetof(struct CUSTOM, serdatr));
-	DEFINE(C_SERDAT, offsetof(struct CUSTOM, serdat));
-	DEFINE(C_SERPER, offsetof(struct CUSTOM, serper));
-	DEFINE(CIAABASE, &ciaa);
-	DEFINE(CIABBASE, &ciab);
-	DEFINE(C_PRA, offsetof(struct CIA, pra));
-	DEFINE(ZTWOBASE, zTwoBase);
-
-	return 0;
-}

arch/m68k/kernel/asm-offsets_mm.c

···
+/*
+ * This program is used to generate definitions needed by
+ * assembly language modules.
+ *
+ * We use the technique used in the OSF Mach kernel code:
+ * generate asm statements containing #defines,
+ * compile this file to assembler, and then extract the
+ * #defines from the assembly-language output.
+ */
+
+#define ASM_OFFSETS_C
+
+#include <linux/stddef.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <linux/kbuild.h>
+#include <asm/bootinfo.h>
+#include <asm/irq.h>
+#include <asm/amigahw.h>
+#include <linux/font.h>
+
+int main(void)
+{
+	/* offsets into the task struct */
+	DEFINE(TASK_THREAD, offsetof(struct task_struct, thread));
+	DEFINE(TASK_INFO, offsetof(struct task_struct, thread.info));
+	DEFINE(TASK_MM, offsetof(struct task_struct, mm));
+#ifdef CONFIG_MMU
+	DEFINE(TASK_TINFO, offsetof(struct task_struct, thread.info));
+#endif
+
+	/* offsets into the thread struct */
+	DEFINE(THREAD_KSP, offsetof(struct thread_struct, ksp));
+	DEFINE(THREAD_USP, offsetof(struct thread_struct, usp));
+	DEFINE(THREAD_SR, offsetof(struct thread_struct, sr));
+	DEFINE(THREAD_FS, offsetof(struct thread_struct, fs));
+	DEFINE(THREAD_CRP, offsetof(struct thread_struct, crp));
+	DEFINE(THREAD_ESP0, offsetof(struct thread_struct, esp0));
+	DEFINE(THREAD_FPREG, offsetof(struct thread_struct, fp));
+	DEFINE(THREAD_FPCNTL, offsetof(struct thread_struct, fpcntl));
+	DEFINE(THREAD_FPSTATE, offsetof(struct thread_struct, fpstate));
+
+	/* offsets into the thread_info struct */
+	DEFINE(TINFO_PREEMPT, offsetof(struct thread_info, preempt_count));
+	DEFINE(TINFO_FLAGS, offsetof(struct thread_info, flags));
+
+	/* offsets into the pt_regs */
+	DEFINE(PT_OFF_D0, offsetof(struct pt_regs, d0));
+	DEFINE(PT_OFF_ORIG_D0, offsetof(struct pt_regs, orig_d0));
+	DEFINE(PT_OFF_D1, offsetof(struct pt_regs, d1));
+	DEFINE(PT_OFF_D2, offsetof(struct pt_regs, d2));
+	DEFINE(PT_OFF_D3, offsetof(struct pt_regs, d3));
+	DEFINE(PT_OFF_D4, offsetof(struct pt_regs, d4));
+	DEFINE(PT_OFF_D5, offsetof(struct pt_regs, d5));
+	DEFINE(PT_OFF_A0, offsetof(struct pt_regs, a0));
+	DEFINE(PT_OFF_A1, offsetof(struct pt_regs, a1));
+	DEFINE(PT_OFF_A2, offsetof(struct pt_regs, a2));
+	DEFINE(PT_OFF_PC, offsetof(struct pt_regs, pc));
+	DEFINE(PT_OFF_SR, offsetof(struct pt_regs, sr));
+	/* bitfields are a bit difficult */
+	DEFINE(PT_OFF_FORMATVEC, offsetof(struct pt_regs, pc) + 4);
+
+	/* offsets into the irq_cpustat_t struct */
+	DEFINE(CPUSTAT_SOFTIRQ_PENDING, offsetof(irq_cpustat_t, __softirq_pending));
+
+	/* offsets into the bi_record struct */
+	DEFINE(BIR_TAG, offsetof(struct bi_record, tag));
+	DEFINE(BIR_SIZE, offsetof(struct bi_record, size));
+	DEFINE(BIR_DATA, offsetof(struct bi_record, data));
+
+	/* offsets into font_desc (drivers/video/console/font.h) */
+	DEFINE(FONT_DESC_IDX, offsetof(struct font_desc, idx));
+	DEFINE(FONT_DESC_NAME, offsetof(struct font_desc, name));
+	DEFINE(FONT_DESC_WIDTH, offsetof(struct font_desc, width));
+	DEFINE(FONT_DESC_HEIGHT, offsetof(struct font_desc, height));
+	DEFINE(FONT_DESC_DATA, offsetof(struct font_desc, data));
+	DEFINE(FONT_DESC_PREF, offsetof(struct font_desc, pref));
+
+	/* signal defines */
+	DEFINE(LSIGSEGV, SIGSEGV);
+	DEFINE(LSEGV_MAPERR, SEGV_MAPERR);
+	DEFINE(LSIGTRAP, SIGTRAP);
+	DEFINE(LTRAP_TRACE, TRAP_TRACE);
+
+	/* offsets into the custom struct */
+	DEFINE(CUSTOMBASE, &amiga_custom);
+	DEFINE(C_INTENAR, offsetof(struct CUSTOM, intenar));
+	DEFINE(C_INTREQR, offsetof(struct CUSTOM, intreqr));
+	DEFINE(C_INTENA, offsetof(struct CUSTOM, intena));
+	DEFINE(C_INTREQ, offsetof(struct CUSTOM, intreq));
+	DEFINE(C_SERDATR, offsetof(struct CUSTOM, serdatr));
+	DEFINE(C_SERDAT, offsetof(struct CUSTOM, serdat));
+	DEFINE(C_SERPER, offsetof(struct CUSTOM, serper));
+	DEFINE(CIAABASE, &ciaa);
+	DEFINE(CIABBASE, &ciab);
+	DEFINE(C_PRA, offsetof(struct CIA, pra));
+	DEFINE(ZTWOBASE, zTwoBase);
+
+	return 0;
+}

arch/m68k/kernel/dma.c

···
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file COPYING in the main directory of this archive
- * for more details.
- */
-
-#undef DEBUG
-
-#include <linux/dma-mapping.h>
-#include <linux/device.h>
-#include <linux/kernel.h>
-#include <linux/scatterlist.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-
-#include <asm/pgalloc.h>
-
-void *dma_alloc_coherent(struct device *dev, size_t size,
-			 dma_addr_t *handle, gfp_t flag)
-{
-	struct page *page, **map;
-	pgprot_t pgprot;
-	void *addr;
-	int i, order;
-
-	pr_debug("dma_alloc_coherent: %d,%x\n", size, flag);
-
-	size = PAGE_ALIGN(size);
-	order = get_order(size);
-
-	page = alloc_pages(flag, order);
-	if (!page)
-		return NULL;
-
-	*handle = page_to_phys(page);
-	map = kmalloc(sizeof(struct page *) << order, flag & ~__GFP_DMA);
-	if (!map) {
-		__free_pages(page, order);
-		return NULL;
-	}
-	split_page(page, order);
-
-	order = 1 << order;
-	size >>= PAGE_SHIFT;
-	map[0] = page;
-	for (i = 1; i < size; i++)
-		map[i] = page + i;
-	for (; i < order; i++)
-		__free_page(page + i);
-	pgprot = __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY);
-	if (CPU_IS_040_OR_060)
-		pgprot_val(pgprot) |= _PAGE_GLOBAL040 | _PAGE_NOCACHE_S;
-	else
-		pgprot_val(pgprot) |= _PAGE_NOCACHE030;
-	addr = vmap(map, size, VM_MAP, pgprot);
-	kfree(map);
-
-	return addr;
-}
-EXPORT_SYMBOL(dma_alloc_coherent);
-
-void dma_free_coherent(struct device *dev, size_t size,
-		       void *addr, dma_addr_t handle)
-{
-	pr_debug("dma_free_coherent: %p, %x\n", addr, handle);
-	vfree(addr);
-}
-EXPORT_SYMBOL(dma_free_coherent);
-
-void dma_sync_single_for_device(struct device *dev, dma_addr_t handle,
-				size_t size, enum dma_data_direction dir)
-{
-	switch (dir) {
-	case DMA_TO_DEVICE:
-		cache_push(handle, size);
-		break;
-	case DMA_FROM_DEVICE:
-		cache_clear(handle, size);
-		break;
-	default:
-		if (printk_ratelimit())
-			printk("dma_sync_single_for_device: unsupported dir %u\n", dir);
-		break;
-	}
-}
-EXPORT_SYMBOL(dma_sync_single_for_device);
-
-void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents,
-			    enum dma_data_direction dir)
-{
-	int i;
-
-	for (i = 0; i < nents; sg++, i++)
-		dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir);
-}
-EXPORT_SYMBOL(dma_sync_sg_for_device);
-
-dma_addr_t dma_map_single(struct device *dev, void *addr, size_t size,
-			  enum dma_data_direction dir)
-{
-	dma_addr_t handle = virt_to_bus(addr);
-
-	dma_sync_single_for_device(dev, handle, size, dir);
-	return handle;
-}
-EXPORT_SYMBOL(dma_map_single);
-
-dma_addr_t dma_map_page(struct device *dev, struct page *page,
-			unsigned long offset, size_t size,
-			enum dma_data_direction dir)
-{
-	dma_addr_t handle = page_to_phys(page) + offset;
-
-	dma_sync_single_for_device(dev, handle, size, dir);
-	return handle;
-}
-EXPORT_SYMBOL(dma_map_page);
-
-int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
-	       enum dma_data_direction dir)
-{
-	int i;
-
-	for (i = 0; i < nents; sg++, i++) {
-		sg->dma_address = sg_phys(sg);
-		dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir);
-	}
-	return nents;
-}
-EXPORT_SYMBOL(dma_map_sg);
+#ifdef CONFIG_MMU
+#include "dma_mm.c"
+#else
+#include "dma_no.c"
+#endif

arch/m68k/kernel/dma_mm.c

···
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+#undef DEBUG
+
+#include <linux/dma-mapping.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+
+#include <asm/pgalloc.h>
+
+void *dma_alloc_coherent(struct device *dev, size_t size,
+			 dma_addr_t *handle, gfp_t flag)
+{
+	struct page *page, **map;
+	pgprot_t pgprot;
+	void *addr;
+	int i, order;
+
+	pr_debug("dma_alloc_coherent: %d,%x\n", size, flag);
+
+	size = PAGE_ALIGN(size);
+	order = get_order(size);
+
+	page = alloc_pages(flag, order);
+	if (!page)
+		return NULL;
+
+	*handle = page_to_phys(page);
+	map = kmalloc(sizeof(struct page *) << order, flag & ~__GFP_DMA);
+	if (!map) {
+		__free_pages(page, order);
+		return NULL;
+	}
+	split_page(page, order);
+
+	order = 1 << order;
+	size >>= PAGE_SHIFT;
+	map[0] = page;
+	for (i = 1; i < size; i++)
+		map[i] = page + i;
+	for (; i < order; i++)
+		__free_page(page + i);
+	pgprot = __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY);
+	if (CPU_IS_040_OR_060)
+		pgprot_val(pgprot) |= _PAGE_GLOBAL040 | _PAGE_NOCACHE_S;
+	else
+		pgprot_val(pgprot) |= _PAGE_NOCACHE030;
+	addr = vmap(map, size, VM_MAP, pgprot);
+	kfree(map);
+
+	return addr;
+}
+EXPORT_SYMBOL(dma_alloc_coherent);
+
+void dma_free_coherent(struct device *dev, size_t size,
+		       void *addr, dma_addr_t handle)
+{
+	pr_debug("dma_free_coherent: %p, %x\n", addr, handle);
+	vfree(addr);
+}
+EXPORT_SYMBOL(dma_free_coherent);
+
+void dma_sync_single_for_device(struct device *dev, dma_addr_t handle,
+				size_t size, enum dma_data_direction dir)
+{
+	switch (dir) {
+	case DMA_TO_DEVICE:
+		cache_push(handle, size);
+		break;
+	case DMA_FROM_DEVICE:
+		cache_clear(handle, size);
+		break;
+	default:
+		if (printk_ratelimit())
+			printk("dma_sync_single_for_device: unsupported dir %u\n", dir);
+		break;
+	}
+}
+EXPORT_SYMBOL(dma_sync_single_for_device);
+
+void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents,
+			    enum dma_data_direction dir)
+{
+	int i;
+
+	for (i = 0; i < nents; sg++, i++)
+		dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir);
+}
+EXPORT_SYMBOL(dma_sync_sg_for_device);
+
+dma_addr_t dma_map_single(struct device *dev, void *addr, size_t size,
+			  enum dma_data_direction dir)
+{
+	dma_addr_t handle = virt_to_bus(addr);
+
+	dma_sync_single_for_device(dev, handle, size, dir);
+	return handle;
+}
+EXPORT_SYMBOL(dma_map_single);
+
+dma_addr_t dma_map_page(struct device *dev, struct page *page,
+			unsigned long offset, size_t size,
+			enum dma_data_direction dir)
+{
+	dma_addr_t handle = page_to_phys(page) + offset;
+
+	dma_sync_single_for_device(dev, handle, size, dir);
+	return handle;
+}
+EXPORT_SYMBOL(dma_map_page);
+
+int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+	       enum dma_data_direction dir)
+{
+	int i;
+
+	for (i = 0; i < nents; sg++, i++) {
+		sg->dma_address = sg_phys(sg);
+		dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir);
+	}
+	return nents;
+}
+EXPORT_SYMBOL(dma_map_sg);

arch/m68k/kernel/entry.S

···
-/* -*- mode: asm -*-
- *
- *  linux/arch/m68k/kernel/entry.S
- *
- *  Copyright (C) 1991, 1992  Linus Torvalds
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file README.legal in the main directory of this archive
- * for more details.
- *
- * Linux/m68k support by Hamish Macdonald
- *
- * 68060 fixes by Jesper Skov
- *
- */
-
-/*
- * entry.S  contains the system-call and fault low-level handling routines.
- * This also contains the timer-interrupt handler, as well as all interrupts
- * and faults that can result in a task-switch.
- *
- * NOTE: This code handles signal-recognition, which happens every time
- * after a timer-interrupt and after each system call.
- *
- */
-
-/*
- * 12/03/96 Jes: Currently we only support m68k single-cpu systems, so
- *               all pointers that used to be 'current' are now entry
- *               number 0 in the 'current_set' list.
- *
- *  6/05/00 RZ:	 addedd writeback completion after return from sighandler
- *		 for 68040
- */
-
-#include <linux/linkage.h>
-#include <asm/entry.h>
-#include <asm/errno.h>
-#include <asm/setup.h>
-#include <asm/segment.h>
-#include <asm/traps.h>
-#include <asm/unistd.h>
-
-#include <asm/asm-offsets.h>
-
-.globl system_call, buserr, trap, resume
-.globl sys_call_table
-.globl sys_fork, sys_clone, sys_vfork
-.globl ret_from_interrupt, bad_interrupt
-.globl auto_irqhandler_fixup
-.globl user_irqvec_fixup, user_irqhandler_fixup
-
-.text
-ENTRY(buserr)
-	SAVE_ALL_INT
-	GET_CURRENT(%d0)
-	movel	%sp,%sp@-		| stack frame pointer argument
-	bsrl	buserr_c
-	addql	#4,%sp
-	jra	.Lret_from_exception
-
-ENTRY(trap)
-	SAVE_ALL_INT
-	GET_CURRENT(%d0)
-	movel	%sp,%sp@-		| stack frame pointer argument
-	bsrl	trap_c
-	addql	#4,%sp
-	jra	.Lret_from_exception
-
-	| After a fork we jump here directly from resume,
-	| so that %d1 contains the previous task
-	| schedule_tail now used regardless of CONFIG_SMP
-ENTRY(ret_from_fork)
-	movel	%d1,%sp@-
-	jsr	schedule_tail
-	addql	#4,%sp
-	jra	.Lret_from_exception
-
-do_trace_entry:
-	movel	#-ENOSYS,%sp@(PT_OFF_D0)| needed for strace
-	subql	#4,%sp
-	SAVE_SWITCH_STACK
-	jbsr	syscall_trace
-	RESTORE_SWITCH_STACK
-	addql	#4,%sp
-	movel	%sp@(PT_OFF_ORIG_D0),%d0
-	cmpl	#NR_syscalls,%d0
-	jcs	syscall
-badsys:
-	movel	#-ENOSYS,%sp@(PT_OFF_D0)
-	jra	ret_from_syscall
-
-do_trace_exit:
-	subql	#4,%sp
-	SAVE_SWITCH_STACK
-	jbsr	syscall_trace
-	RESTORE_SWITCH_STACK
-	addql	#4,%sp
-	jra	.Lret_from_exception
-
-ENTRY(ret_from_signal)
-	tstb	%curptr@(TASK_INFO+TINFO_FLAGS+2)
-	jge	1f
-	jbsr	syscall_trace
-1:	RESTORE_SWITCH_STACK
-	addql	#4,%sp
-/* on 68040 complete pending writebacks if any */
-#ifdef CONFIG_M68040
-	bfextu	%sp@(PT_OFF_FORMATVEC){#0,#4},%d0
-	subql	#7,%d0				| bus error frame ?
-	jbne	1f
-	movel	%sp,%sp@-
-	jbsr	berr_040cleanup
-	addql	#4,%sp
-1:
+#ifdef CONFIG_MMU
+#include "entry_mm.S"
+#else
+#include "entry_no.S"
 #endif
-	jra	.Lret_from_exception
-
-ENTRY(system_call)
-	SAVE_ALL_SYS
-
-	GET_CURRENT(%d1)
-	| save top of frame
-	movel	%sp,%curptr@(TASK_THREAD+THREAD_ESP0)
-
-	| syscall trace?
-	tstb	%curptr@(TASK_INFO+TINFO_FLAGS+2)
-	jmi	do_trace_entry
-	cmpl	#NR_syscalls,%d0
-	jcc	badsys
-syscall:
-	jbsr	@(sys_call_table,%d0:l:4)@(0)
-	movel	%d0,%sp@(PT_OFF_D0)	| save the return value
-ret_from_syscall:
-	|oriw	#0x0700,%sr
-	movew	%curptr@(TASK_INFO+TINFO_FLAGS+2),%d0
-	jne	syscall_exit_work
-1:	RESTORE_ALL
-
-syscall_exit_work:
-	btst	#5,%sp@(PT_OFF_SR)	| check if returning to kernel
-	bnes	1b			| if so, skip resched, signals
-	lslw	#1,%d0
-	jcs	do_trace_exit
-	jmi	do_delayed_trace
-	lslw	#8,%d0
-	jmi	do_signal_return
-	pea	resume_userspace
-	jra	schedule
-
-
-ENTRY(ret_from_exception)
-.Lret_from_exception:
-	btst	#5,%sp@(PT_OFF_SR)	| check if returning to kernel
-	bnes	1f			| if so, skip resched, signals
-	| only allow interrupts when we are really the last one on the
-	| kernel stack, otherwise stack overflow can occur during
-	| heavy interrupt load
-	andw	#ALLOWINT,%sr
-
-resume_userspace:
-	moveb	%curptr@(TASK_INFO+TINFO_FLAGS+3),%d0
-	jne	exit_work
-1:	RESTORE_ALL
-
-exit_work:
-	| save top of frame
-	movel	%sp,%curptr@(TASK_THREAD+THREAD_ESP0)
-	lslb	#1,%d0
-	jmi	do_signal_return
-	pea	resume_userspace
-	jra	schedule
-
-
-do_signal_return:
-	|andw	#ALLOWINT,%sr
-	subql	#4,%sp			| dummy return address
-	SAVE_SWITCH_STACK
-	pea	%sp@(SWITCH_STACK_SIZE)
-	bsrl	do_signal
-	addql	#4,%sp
-	RESTORE_SWITCH_STACK
-	addql	#4,%sp
-	jbra	resume_userspace
-
-do_delayed_trace:
-	bclr	#7,%sp@(PT_OFF_SR)	| clear trace bit in SR
-	pea	1			| send SIGTRAP
-	movel	%curptr,%sp@-
-	pea	LSIGTRAP
-	jbsr	send_sig
-	addql	#8,%sp
-	addql	#4,%sp
-	jbra	resume_userspace
-
-
-/* This is the main interrupt handler for autovector interrupts */
-
-ENTRY(auto_inthandler)
-	SAVE_ALL_INT
-	GET_CURRENT(%d0)
-	addqb	#1,%curptr@(TASK_INFO+TINFO_PREEMPT+1)
-					|  put exception # in d0
-	bfextu	%sp@(PT_OFF_FORMATVEC){#4,#10},%d0
-	subw	#VEC_SPUR,%d0
-
-	movel	%sp,%sp@-
-	movel	%d0,%sp@-		|  put vector # on stack
-auto_irqhandler_fixup = . + 2
-	jsr	__m68k_handle_int	|  process the IRQ
-	addql	#8,%sp			|  pop parameters off stack
-
-ret_from_interrupt:
-	subqb	#1,%curptr@(TASK_INFO+TINFO_PREEMPT+1)
-	jeq	ret_from_last_interrupt
-2:	RESTORE_ALL
-
-	ALIGN
-ret_from_last_interrupt:
-	moveq	#(~ALLOWINT>>8)&0xff,%d0
-	andb	%sp@(PT_OFF_SR),%d0
-	jne	2b
-
-	/* check if we need to do software interrupts */
-	tstl	irq_stat+CPUSTAT_SOFTIRQ_PENDING
-	jeq	.Lret_from_exception
-	pea	ret_from_exception
-	jra	do_softirq
-
-/* Handler for user defined interrupt vectors */
-
-ENTRY(user_inthandler)
-	SAVE_ALL_INT
-	GET_CURRENT(%d0)
-	addqb	#1,%curptr@(TASK_INFO+TINFO_PREEMPT+1)
-					|  put exception # in d0
-	bfextu	%sp@(PT_OFF_FORMATVEC){#4,#10},%d0
-user_irqvec_fixup = . + 2
-	subw	#VEC_USER,%d0
-
-	movel	%sp,%sp@-
-	movel	%d0,%sp@-		|  put vector # on stack
-user_irqhandler_fixup = . + 2
-	jsr	__m68k_handle_int	|  process the IRQ
-	addql	#8,%sp			|  pop parameters off stack
-
-	subqb	#1,%curptr@(TASK_INFO+TINFO_PREEMPT+1)
-	jeq	ret_from_last_interrupt
-	RESTORE_ALL
-
-/* Handler for uninitialized and spurious interrupts */
-
-ENTRY(bad_inthandler)
-	SAVE_ALL_INT
-	GET_CURRENT(%d0)
-	addqb	#1,%curptr@(TASK_INFO+TINFO_PREEMPT+1)
-
-	movel	%sp,%sp@-
-	jsr	handle_badint
-	addql	#4,%sp
-
-	subqb	#1,%curptr@(TASK_INFO+TINFO_PREEMPT+1)
-	jeq	ret_from_last_interrupt
-	RESTORE_ALL
-
-
-ENTRY(sys_fork)
-	SAVE_SWITCH_STACK
-	pea	%sp@(SWITCH_STACK_SIZE)
-	jbsr	m68k_fork
-	addql	#4,%sp
-	RESTORE_SWITCH_STACK
-	rts
-
-ENTRY(sys_clone)
-	SAVE_SWITCH_STACK
-	pea	%sp@(SWITCH_STACK_SIZE)
-	jbsr	m68k_clone
-	addql	#4,%sp
-	RESTORE_SWITCH_STACK
-	rts
-
-ENTRY(sys_vfork)
-	SAVE_SWITCH_STACK
-	pea	%sp@(SWITCH_STACK_SIZE)
-	jbsr	m68k_vfork
-	addql	#4,%sp
-	RESTORE_SWITCH_STACK
-	rts
-
-ENTRY(sys_sigreturn)
-	SAVE_SWITCH_STACK
-	jbsr	do_sigreturn
-	RESTORE_SWITCH_STACK
-	rts
-
-ENTRY(sys_rt_sigreturn)
-	SAVE_SWITCH_STACK
-	jbsr	do_rt_sigreturn
-	RESTORE_SWITCH_STACK
-	rts
-
-resume:
-	/*
-	 * Beware - when entering resume, prev (the current task) is
-	 * in a0, next (the new task) is in a1,so don't change these
-	 * registers until their contents are no longer needed.
-	 */
-
-	/* save sr */
-	movew	%sr,%a0@(TASK_THREAD+THREAD_SR)
-
-	/* save fs (sfc,%dfc) (may be pointing to kernel memory) */
-	movec	%sfc,%d0
-	movew	%d0,%a0@(TASK_THREAD+THREAD_FS)
-
-	/* save usp */
-	/* it is better to use a movel here instead of a movew 8*) */
-	movec	%usp,%d0
-	movel	%d0,%a0@(TASK_THREAD+THREAD_USP)
-
-	/* save non-scratch registers on stack */
-	SAVE_SWITCH_STACK
-
-	/* save current kernel stack pointer */
-	movel	%sp,%a0@(TASK_THREAD+THREAD_KSP)
-
-	/* save floating point context */
-#ifndef CONFIG_M68KFPU_EMU_ONLY
-#ifdef CONFIG_M68KFPU_EMU
-	tstl	m68k_fputype
-	jeq	3f
-#endif
-	fsave	%a0@(TASK_THREAD+THREAD_FPSTATE)
-
-#if defined(CONFIG_M68060)
-#if !defined(CPU_M68060_ONLY)
-	btst	#3,m68k_cputype+3
-	beqs	1f
-#endif
-	/* The 060 FPU keeps status in bits 15-8 of the first longword */
-	tstb	%a0@(TASK_THREAD+THREAD_FPSTATE+2)
-	jeq	3f
-#if !defined(CPU_M68060_ONLY)
-	jra	2f
-#endif
-#endif /* CONFIG_M68060 */
-#if !defined(CPU_M68060_ONLY)
-1:	tstb	%a0@(TASK_THREAD+THREAD_FPSTATE)
-	jeq	3f
-#endif
-2:	fmovemx	%fp0-%fp7,%a0@(TASK_THREAD+THREAD_FPREG)
-	fmoveml	%fpcr/%fpsr/%fpiar,%a0@(TASK_THREAD+THREAD_FPCNTL)
-3:
-#endif	/* CONFIG_M68KFPU_EMU_ONLY */
-	/* Return previous task in %d1 */
-	movel	%curptr,%d1
-
-	/* switch to new task (a1 contains new task) */
-	movel	%a1,%curptr
-
-	/* restore floating point context */
-#ifndef CONFIG_M68KFPU_EMU_ONLY
-#ifdef CONFIG_M68KFPU_EMU
-	tstl	m68k_fputype
-	jeq	4f
-#endif
-#if defined(CONFIG_M68060)
-#if !defined(CPU_M68060_ONLY)
-	btst	#3,m68k_cputype+3
-	beqs	1f
-#endif
-	/* The 060 FPU keeps status in bits 15-8 of the first longword */
-	tstb	%a1@(TASK_THREAD+THREAD_FPSTATE+2)
-	jeq	3f
-#if !defined(CPU_M68060_ONLY)
-	jra	2f
-#endif
-#endif /* CONFIG_M68060 */
-#if !defined(CPU_M68060_ONLY)
-1:	tstb	%a1@(TASK_THREAD+THREAD_FPSTATE)
-	jeq	3f
-#endif
-2:	fmovemx	%a1@(TASK_THREAD+THREAD_FPREG),%fp0-%fp7
-	fmoveml	%a1@(TASK_THREAD+THREAD_FPCNTL),%fpcr/%fpsr/%fpiar
-3:	frestore %a1@(TASK_THREAD+THREAD_FPSTATE)
-4:
-#endif	/* CONFIG_M68KFPU_EMU_ONLY */
-
-	/* restore the kernel stack pointer */
-	movel	%a1@(TASK_THREAD+THREAD_KSP),%sp
-
-	/* restore non-scratch registers */
-	RESTORE_SWITCH_STACK
-
-	/* restore user stack pointer */
-	movel	%a1@(TASK_THREAD+THREAD_USP),%a0
-	movel	%a0,%usp
-
-	/* restore fs (sfc,%dfc) */
-	movew	%a1@(TASK_THREAD+THREAD_FS),%a0
-	movec	%a0,%sfc
-	movec	%a0,%dfc
-
-	/* restore status register */
-	movew	%a1@(TASK_THREAD+THREAD_SR),%sr
-
-	rts
-
-.data
-ALIGN
-sys_call_table:
-	.long sys_restart_syscall	/* 0 - old "setup()" system call, used for restarting */
-	.long sys_exit
-	.long sys_fork
-	.long sys_read
-	.long sys_write
-	.long sys_open		/* 5 */
-	.long sys_close
-	.long sys_waitpid
-	.long sys_creat
-	.long sys_link
-	.long sys_unlink	/* 10 */
-	.long sys_execve
-	.long sys_chdir
-	.long sys_time
-	.long sys_mknod
-	.long sys_chmod		/* 15 */
-	.long sys_chown16
-	.long sys_ni_syscall				/* old break syscall holder */
-	.long sys_stat
-	.long sys_lseek
-	.long sys_getpid	/* 20 */
-	.long sys_mount
-	.long sys_oldumount
-	.long sys_setuid16
-	.long sys_getuid16
-	.long sys_stime		/* 25 */
-	.long sys_ptrace
-	.long sys_alarm
-	.long sys_fstat
-	.long sys_pause
-	.long sys_utime		/* 30 */
-	.long sys_ni_syscall				/* old stty syscall holder */
-	.long sys_ni_syscall				/* old gtty syscall holder */
-	.long sys_access
-	.long sys_nice
-	.long sys_ni_syscall	/* 35 */	/* old ftime syscall holder */
-	.long sys_sync
-	.long sys_kill
-	.long sys_rename
-	.long sys_mkdir
-	.long sys_rmdir		/* 40 */
-	.long sys_dup
-	.long sys_pipe
-	.long sys_times
-	.long sys_ni_syscall				/* old prof syscall holder */
-	.long sys_brk		/* 45 */
-	.long sys_setgid16
-	.long sys_getgid16
-	.long sys_signal
-	.long sys_geteuid16
-	.long sys_getegid16	/* 50 */
-	.long sys_acct
-	.long sys_umount				/* recycled never used phys() */
-	.long sys_ni_syscall				/* old lock syscall holder */
-	.long sys_ioctl
-	.long sys_fcntl		/* 55 */
-	.long sys_ni_syscall				/* old mpx syscall holder */
-	.long sys_setpgid
-	.long sys_ni_syscall				/* old ulimit syscall holder */
-	.long sys_ni_syscall
-	.long sys_umask		/* 60 */
-	.long sys_chroot
-	.long sys_ustat
-	.long sys_dup2
-	.long sys_getppid
-	.long sys_getpgrp	/* 65 */
-	.long sys_setsid
-	.long sys_sigaction
-	.long sys_sgetmask
-	.long sys_ssetmask
-	.long sys_setreuid16	/* 70 */
-	.long sys_setregid16
-	.long sys_sigsuspend
-	.long sys_sigpending
-	.long sys_sethostname
-	.long sys_setrlimit	/* 75 */
-	.long sys_old_getrlimit
-	.long sys_getrusage
-	.long sys_gettimeofday
-	.long sys_settimeofday
-	.long sys_getgroups16	/* 80 */
-	.long sys_setgroups16
-	.long sys_old_select
-	.long sys_symlink
-	.long sys_lstat
-	.long sys_readlink	/* 85 */
-	.long sys_uselib
-	.long sys_swapon
-	.long sys_reboot
-	.long sys_old_readdir
-	.long sys_old_mmap	/* 90 */
-	.long sys_munmap
-	.long sys_truncate
-	.long sys_ftruncate
-	.long sys_fchmod
-	.long sys_fchown16	/* 95 */
-	.long sys_getpriority
-	.long sys_setpriority
-	.long sys_ni_syscall				/* old profil syscall holder */
-	.long sys_statfs
-	.long sys_fstatfs	/* 100 */
-	.long sys_ni_syscall				/* ioperm for i386 */
-	.long sys_socketcall
-	.long sys_syslog
-	.long sys_setitimer
-	.long sys_getitimer	/* 105 */
-	.long sys_newstat
-	.long sys_newlstat
-	.long sys_newfstat
-	.long sys_ni_syscall
-	.long sys_ni_syscall	/* 110 */	/* iopl for i386 */
-	.long sys_vhangup
-	.long sys_ni_syscall				/* obsolete idle() syscall */
-	.long sys_ni_syscall				/* vm86old for i386 */
-	.long sys_wait4
-	.long sys_swapoff	/* 115 */
-	.long sys_sysinfo
-	.long sys_ipc
-	.long sys_fsync
-	.long sys_sigreturn
-	.long sys_clone		/* 120 */
-	.long sys_setdomainname
-	.long sys_newuname
-	.long sys_cacheflush				/* modify_ldt for i386 */
-	.long sys_adjtimex
-	.long sys_mprotect	/* 125 */
-	.long sys_sigprocmask
-	.long sys_ni_syscall		/* old "create_module" */
-	.long sys_init_module
-	.long sys_delete_module
-	.long sys_ni_syscall	/* 130 - old "get_kernel_syms" */
-	.long sys_quotactl
-	.long sys_getpgid
-	.long sys_fchdir
-	.long sys_bdflush
-	.long sys_sysfs		/* 135 */
-	.long sys_personality
-	.long sys_ni_syscall				/* for afs_syscall */
-	.long sys_setfsuid16
-	.long sys_setfsgid16
-	.long sys_llseek	/* 140 */
-	.long sys_getdents
-	.long sys_select
-	.long sys_flock
-	.long sys_msync
-	.long sys_readv		/* 145 */
-	.long sys_writev
-	.long sys_getsid
-	.long sys_fdatasync
-	.long sys_sysctl
-	.long sys_mlock		/* 150 */
-	.long sys_munlock
-	.long sys_mlockall
-	.long sys_munlockall
-	.long sys_sched_setparam
-	.long sys_sched_getparam	/* 155 */
-	.long sys_sched_setscheduler
-	.long sys_sched_getscheduler
-	.long sys_sched_yield
-	.long sys_sched_get_priority_max
-	.long sys_sched_get_priority_min  /* 160 */
-	.long sys_sched_rr_get_interval
-	.long sys_nanosleep
-	.long sys_mremap
-	.long sys_setresuid16
-	.long sys_getresuid16	/* 165 */
-	.long sys_getpagesize
-	.long sys_ni_syscall		/* old sys_query_module */
-	.long sys_poll
-	.long sys_nfsservctl
-	.long sys_setresgid16	/* 170 */
-	.long sys_getresgid16
-	.long sys_prctl
-	.long sys_rt_sigreturn
-	.long sys_rt_sigaction
-	.long sys_rt_sigprocmask	/* 175 */
-	.long sys_rt_sigpending
-	.long sys_rt_sigtimedwait
-	.long sys_rt_sigqueueinfo
-	.long sys_rt_sigsuspend
-	.long sys_pread64	/* 180 */
-	.long sys_pwrite64
-	.long sys_lchown16;
-	.long sys_getcwd
-	.long sys_capget
-	.long sys_capset	/* 185 */
-	.long sys_sigaltstack
-	.long sys_sendfile
-	.long sys_ni_syscall				/* streams1 */
-	.long sys_ni_syscall				/* streams2 */
-	.long sys_vfork		/* 190 */
-	.long sys_getrlimit
-	.long sys_mmap2
-	.long sys_truncate64
-	.long sys_ftruncate64
-	.long sys_stat64	/* 195 */
-	.long sys_lstat64
-	.long sys_fstat64
-	.long sys_chown
-	.long sys_getuid
-	.long sys_getgid	/* 200 */
-	.long sys_geteuid
-	.long sys_getegid
-	.long sys_setreuid
-	.long sys_setregid
-	.long sys_getgroups	/* 205 */
-	.long sys_setgroups
-	.long sys_fchown
-	.long sys_setresuid
-	.long sys_getresuid
-	.long sys_setresgid	/* 210 */
-	.long sys_getresgid
-	.long sys_lchown
-	.long sys_setuid
-	.long sys_setgid
-	.long sys_setfsuid	/* 215 */
-	.long sys_setfsgid
-	.long sys_pivot_root
-	.long sys_ni_syscall
-	.long sys_ni_syscall
-	.long sys_getdents64	/* 220 */
-	.long sys_gettid
-	.long sys_tkill
-	.long sys_setxattr
-	.long sys_lsetxattr
-	.long sys_fsetxattr	/* 225 */
-	.long sys_getxattr
-	.long sys_lgetxattr
-	.long sys_fgetxattr
-	.long sys_listxattr
-	.long sys_llistxattr	/* 230 */
-	.long sys_flistxattr
-	.long sys_removexattr
-	.long sys_lremovexattr
-	.long sys_fremovexattr
-	.long sys_futex		/* 235 */
-	.long sys_sendfile64
-	.long sys_mincore
-	.long sys_madvise
-	.long sys_fcntl64
-	.long sys_readahead	/* 240 */
-	.long sys_io_setup
-	.long sys_io_destroy
-	.long sys_io_getevents
-	.long sys_io_submit
-	.long sys_io_cancel	/* 245 */
-	.long sys_fadvise64
-	.long sys_exit_group
-	.long sys_lookup_dcookie
-	.long sys_epoll_create
-	.long sys_epoll_ctl	/* 250 */
-	.long sys_epoll_wait
-	.long sys_remap_file_pages
-	.long sys_set_tid_address
-	.long sys_timer_create
-	.long sys_timer_settime	/* 255 */
-	.long sys_timer_gettime
-	.long sys_timer_getoverrun
-	.long sys_timer_delete
-	.long sys_clock_settime
-	.long sys_clock_gettime	/* 260 */
-	.long sys_clock_getres
-	.long sys_clock_nanosleep
-	.long sys_statfs64
-	.long sys_fstatfs64
-	.long sys_tgkill	/* 265 */
-	.long sys_utimes
-	.long sys_fadvise64_64
-	.long sys_mbind
-	.long sys_get_mempolicy
-	.long sys_set_mempolicy	/* 270 */
-	.long sys_mq_open
-	.long sys_mq_unlink
-	.long sys_mq_timedsend
-	.long sys_mq_timedreceive
-	.long sys_mq_notify	/* 275 */
-	.long sys_mq_getsetattr
-	.long sys_waitid
-	.long sys_ni_syscall	/* for sys_vserver */
-	.long sys_add_key
-	.long sys_request_key	/* 280 */
-	.long sys_keyctl
-	.long sys_ioprio_set
-	.long sys_ioprio_get
-	.long sys_inotify_init
-	.long sys_inotify_add_watch	/* 285 */
-	.long sys_inotify_rm_watch
-	.long sys_migrate_pages
-	.long sys_openat
-	.long sys_mkdirat
-	.long sys_mknodat		/* 290 */
-	.long sys_fchownat
-	.long sys_futimesat
-	.long sys_fstatat64
-	.long sys_unlinkat
-	.long sys_renameat		/* 295 */
-	.long sys_linkat
-	.long sys_symlinkat
-	.long sys_readlinkat
-	.long sys_fchmodat
-	.long sys_faccessat		/* 300 */
-	.long sys_ni_syscall		/* Reserved for pselect6 */
-	.long sys_ni_syscall		/* Reserved for ppoll */
-	.long sys_unshare
-	.long sys_set_robust_list
-	.long sys_get_robust_list	/* 305 */
-	.long sys_splice
-	.long sys_sync_file_range
-	.long sys_tee
-	.long sys_vmsplice
-	.long sys_move_pages		/* 310 */
-	.long sys_sched_setaffinity
-	.long sys_sched_getaffinity
-	.long sys_kexec_load
-	.long sys_getcpu
-	.long sys_epoll_pwait		/* 315 */
-	.long sys_utimensat
-	.long sys_signalfd
-	.long sys_timerfd_create
-	.long sys_eventfd
-	.long sys_fallocate		/* 320 */
-	.long sys_timerfd_settime
-	.long sys_timerfd_gettime
-	.long sys_signalfd4
-	.long sys_eventfd2
-	.long sys_epoll_create1		/* 325 */
-	.long sys_dup3
-	.long sys_pipe2
-	.long sys_inotify_init1
-	.long sys_preadv
-	.long sys_pwritev		/* 330 */
-	.long sys_rt_tgsigqueueinfo
-	.long sys_perf_event_open
-	.long sys_get_thread_area
-	.long sys_set_thread_area
-	.long sys_atomic_cmpxchg_32	/* 335 */
-	.long sys_atomic_barrier
-	.long sys_fanotify_init
-	.long sys_fanotify_mark
-	.long sys_prlimit64
-

arch/m68k/kernel/entry_mm.S

···
+/* -*- mode: asm -*-
+ *
+ *  linux/arch/m68k/kernel/entry.S
+ *
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file README.legal in the main directory of this archive
+ * for more details.
+ *
+ * Linux/m68k support by Hamish Macdonald
+ *
+ * 68060 fixes by Jesper Skov
+ *
+ */
+
+/*
+ * entry.S  contains the system-call and fault low-level handling routines.
+ * This also contains the timer-interrupt handler, as well as all interrupts
+ * and faults that can result in a task-switch.
+ *
+ * NOTE: This code handles signal-recognition, which happens every time
+ * after a timer-interrupt and after each system call.
+ *
+ */
+
+/*
+ * 12/03/96 Jes: Currently we only support m68k single-cpu systems, so
+ *               all pointers that used to be 'current' are now entry
+ *               number 0 in the 'current_set' list.
+ *
+ *  6/05/00 RZ:	 addedd writeback completion after return from sighandler
+ *		 for 68040
+ */
+
+#include <linux/linkage.h>
+#include <asm/entry.h>
+#include <asm/errno.h>
+#include <asm/setup.h>
+#include <asm/segment.h>
+#include <asm/traps.h>
+#include <asm/unistd.h>
+
+#include <asm/asm-offsets.h>
+
+.globl system_call, buserr, trap, resume
+.globl sys_call_table
+.globl sys_fork, sys_clone, sys_vfork
+.globl ret_from_interrupt, bad_interrupt
+.globl auto_irqhandler_fixup
+.globl user_irqvec_fixup, user_irqhandler_fixup
+
+.text
+ENTRY(buserr)
+	SAVE_ALL_INT
+	GET_CURRENT(%d0)
+	movel	%sp,%sp@-		| stack frame pointer argument
+	bsrl	buserr_c
+	addql	#4,%sp
+	jra	.Lret_from_exception
+
+ENTRY(trap)
+	SAVE_ALL_INT
+	GET_CURRENT(%d0)
+	movel	%sp,%sp@-		| stack frame pointer argument
+	bsrl	trap_c
+	addql	#4,%sp
+	jra	.Lret_from_exception
+
+	| After a fork we jump here directly from resume,
+	| so that %d1 contains the previous task
+	| schedule_tail now used regardless of CONFIG_SMP
+ENTRY(ret_from_fork)
+	movel	%d1,%sp@-
+	jsr	schedule_tail
+	addql	#4,%sp
+	jra	.Lret_from_exception
+
+do_trace_entry:
+	movel	#-ENOSYS,%sp@(PT_OFF_D0)| needed for strace
+	subql	#4,%sp
+	SAVE_SWITCH_STACK
+	jbsr	syscall_trace
+	RESTORE_SWITCH_STACK
+	addql	#4,%sp
+	movel	%sp@(PT_OFF_ORIG_D0),%d0
+	cmpl	#NR_syscalls,%d0
+	jcs	syscall
+badsys:
+	movel	#-ENOSYS,%sp@(PT_OFF_D0)
+	jra	ret_from_syscall
+
+do_trace_exit:
+	subql	#4,%sp
+	SAVE_SWITCH_STACK
+	jbsr	syscall_trace
+	RESTORE_SWITCH_STACK
+	addql	#4,%sp
+	jra	.Lret_from_exception
+
+ENTRY(ret_from_signal)
+	tstb	%curptr@(TASK_INFO+TINFO_FLAGS+2)
+	jge	1f
+	jbsr	syscall_trace
+1:	RESTORE_SWITCH_STACK
+	addql	#4,%sp
+/* on 68040 complete pending writebacks if any */
+#ifdef CONFIG_M68040
+	bfextu	%sp@(PT_OFF_FORMATVEC){#0,#4},%d0
+	subql	#7,%d0				| bus error frame ?
+	jbne	1f
+	movel	%sp,%sp@-
+	jbsr	berr_040cleanup
+	addql	#4,%sp
+1:
+#endif
+	jra	.Lret_from_exception
+
+ENTRY(system_call)
+	SAVE_ALL_SYS
+
+	GET_CURRENT(%d1)
+	| save top of frame
+	movel	%sp,%curptr@(TASK_THREAD+THREAD_ESP0)
+
+	| syscall trace?
+	tstb	%curptr@(TASK_INFO+TINFO_FLAGS+2)
+	jmi	do_trace_entry
+	cmpl	#NR_syscalls,%d0
+	jcc	badsys
+syscall:
+	jbsr	@(sys_call_table,%d0:l:4)@(0)
+	movel	%d0,%sp@(PT_OFF_D0)	| save the return value
+ret_from_syscall:
+	|oriw	#0x0700,%sr
+	movew	%curptr@(TASK_INFO+TINFO_FLAGS+2),%d0
+	jne	syscall_exit_work
+1:	RESTORE_ALL
+
+syscall_exit_work:
+	btst	#5,%sp@(PT_OFF_SR)	| check if returning to kernel
+	bnes	1b			| if so, skip resched, signals
+	lslw	#1,%d0
+	jcs	do_trace_exit
+	jmi	do_delayed_trace
+	lslw	#8,%d0
+	jmi	do_signal_return
+	pea	resume_userspace
+	jra	schedule
+
+
+ENTRY(ret_from_exception)
+.Lret_from_exception:
+	btst	#5,%sp@(PT_OFF_SR)	| check if returning to kernel
+	bnes	1f			| if so, skip resched, signals
+	| only allow interrupts when we are really the last one on the
+	| kernel stack, otherwise stack overflow can occur during
+	| heavy interrupt load
+	andw	#ALLOWINT,%sr
+
+resume_userspace:
+	moveb	%curptr@(TASK_INFO+TINFO_FLAGS+3),%d0
+	jne	exit_work
+1:	RESTORE_ALL
+
+exit_work:
+	| save top of frame
+	movel	%sp,%curptr@(TASK_THREAD+THREAD_ESP0)
+	lslb	#1,%d0
+	jmi	do_signal_return
+	pea	resume_userspace
+	jra	schedule
+
+
+do_signal_return:
+	|andw	#ALLOWINT,%sr
+	subql	#4,%sp			| dummy return address
+	SAVE_SWITCH_STACK
+	pea	%sp@(SWITCH_STACK_SIZE)
+	bsrl	do_signal
+	addql	#4,%sp
+	RESTORE_SWITCH_STACK
+	addql	#4,%sp
+	jbra	resume_userspace
+
+do_delayed_trace:
+	bclr	#7,%sp@(PT_OFF_SR)	| clear trace bit in SR
+	pea	1			| send SIGTRAP
+	movel	%curptr,%sp@-
+	pea	LSIGTRAP
+	jbsr	send_sig
+	addql	#8,%sp
+	addql	#4,%sp
+	jbra	resume_userspace
+
+
+/* This is the main interrupt handler for autovector interrupts */
+
+ENTRY(auto_inthandler)
+	SAVE_ALL_INT
+	GET_CURRENT(%d0)
+	addqb	#1,%curptr@(TASK_INFO+TINFO_PREEMPT+1)
+					|  put exception # in d0
+	bfextu	%sp@(PT_OFF_FORMATVEC){#4,#10},%d0
+	subw	#VEC_SPUR,%d0
+
+	movel	%sp,%sp@-
+	movel	%d0,%sp@-		|  put vector # on stack
+auto_irqhandler_fixup = . + 2
+	jsr	__m68k_handle_int	|  process the IRQ
+	addql	#8,%sp			|  pop parameters off stack
+
+ret_from_interrupt:
+	subqb	#1,%curptr@(TASK_INFO+TINFO_PREEMPT+1)
+	jeq	ret_from_last_interrupt
+2:	RESTORE_ALL
+
+	ALIGN
+ret_from_last_interrupt:
+	moveq	#(~ALLOWINT>>8)&0xff,%d0
+	andb	%sp@(PT_OFF_SR),%d0
+	jne	2b
+
+	/* check if we need to do software interrupts */
+	tstl	irq_stat+CPUSTAT_SOFTIRQ_PENDING
+	jeq	.Lret_from_exception
+	pea	ret_from_exception
+	jra	do_softirq
+
+/* Handler for user defined interrupt vectors */
+
+ENTRY(user_inthandler)
+	SAVE_ALL_INT
+	GET_CURRENT(%d0)
+	addqb	#1,%curptr@(TASK_INFO+TINFO_PREEMPT+1)
+					|  put exception # in d0
+	bfextu	%sp@(PT_OFF_FORMATVEC){#4,#10},%d0
+user_irqvec_fixup = . + 2
+	subw	#VEC_USER,%d0
+
+	movel	%sp,%sp@-
+	movel	%d0,%sp@-		|  put vector # on stack
+user_irqhandler_fixup = . + 2
+	jsr	__m68k_handle_int	|  process the IRQ
+	addql	#8,%sp			|  pop parameters off stack
+
+	subqb	#1,%curptr@(TASK_INFO+TINFO_PREEMPT+1)
+	jeq	ret_from_last_interrupt
+	RESTORE_ALL
+
+/* Handler for uninitialized and spurious interrupts */
+
+ENTRY(bad_inthandler)
+	SAVE_ALL_INT
+	GET_CURRENT(%d0)
+	addqb	#1,%curptr@(TASK_INFO+TINFO_PREEMPT+1)
+
+	movel	%sp,%sp@-
+	jsr	handle_badint
+	addql	#4,%sp
+
+	subqb	#1,%curptr@(TASK_INFO+TINFO_PREEMPT+1)
+	jeq	ret_from_last_interrupt
+	RESTORE_ALL
+
+
+ENTRY(sys_fork)
+	SAVE_SWITCH_STACK
+	pea	%sp@(SWITCH_STACK_SIZE)
+	jbsr	m68k_fork
+	addql	#4,%sp
+	RESTORE_SWITCH_STACK
+	rts
+
+ENTRY(sys_clone)
+	SAVE_SWITCH_STACK
+	pea	%sp@(SWITCH_STACK_SIZE)
+	jbsr	m68k_clone
+	addql	#4,%sp
+	RESTORE_SWITCH_STACK
+	rts
+
+ENTRY(sys_vfork)
+	SAVE_SWITCH_STACK
+	pea	%sp@(SWITCH_STACK_SIZE)
+	jbsr	m68k_vfork
+	addql	#4,%sp
+	RESTORE_SWITCH_STACK
+	rts
+
+ENTRY(sys_sigreturn)
+	SAVE_SWITCH_STACK
+	jbsr	do_sigreturn
+	RESTORE_SWITCH_STACK
+	rts
+
+ENTRY(sys_rt_sigreturn)
+	SAVE_SWITCH_STACK
+	jbsr	do_rt_sigreturn
+	RESTORE_SWITCH_STACK
+	rts
+
+resume:
+	/*
+	 * Beware - when entering resume, prev (the current task) is
+	 * in a0, next (the new task) is in a1,so don't change these
+	 * registers until their contents are no longer needed.
+	 */
+
+	/* save sr */
+	movew	%sr,%a0@(TASK_THREAD+THREAD_SR)
+
+	/* save fs (sfc,%dfc) (may be pointing to kernel memory) */
+	movec	%sfc,%d0
+	movew	%d0,%a0@(TASK_THREAD+THREAD_FS)
+
+	/* save usp */
+	/* it is better to use a movel here instead of a movew 8*) */
+	movec	%usp,%d0
+	movel	%d0,%a0@(TASK_THREAD+THREAD_USP)
+
+	/* save non-scratch registers on stack */
+	SAVE_SWITCH_STACK
+
+	/* save current kernel stack pointer */
+	movel	%sp,%a0@(TASK_THREAD+THREAD_KSP)
+
+	/* save floating point context */
+#ifndef CONFIG_M68KFPU_EMU_ONLY
+#ifdef CONFIG_M68KFPU_EMU
+	tstl	m68k_fputype
+	jeq	3f
+#endif
+	fsave	%a0@(TASK_THREAD+THREAD_FPSTATE)
+
+#if defined(CONFIG_M68060)
+#if !defined(CPU_M68060_ONLY)
+	btst	#3,m68k_cputype+3
+	beqs	1f
+#endif
+	/* The 060 FPU keeps status in bits 15-8 of the first longword */
+	tstb	%a0@(TASK_THREAD+THREAD_FPSTATE+2)
+	jeq	3f
+#if !defined(CPU_M68060_ONLY)
+	jra	2f
+#endif
+#endif /* CONFIG_M68060 */
+#if !defined(CPU_M68060_ONLY)
+1:	tstb	%a0@(TASK_THREAD+THREAD_FPSTATE)
+	jeq	3f
+#endif
+2:	fmovemx	%fp0-%fp7,%a0@(TASK_THREAD+THREAD_FPREG)
+	fmoveml	%fpcr/%fpsr/%fpiar,%a0@(TASK_THREAD+THREAD_FPCNTL)
+3:
+#endif	/* CONFIG_M68KFPU_EMU_ONLY */
+	/* Return previous task in %d1 */
+	movel	%curptr,%d1
+
+	/* switch to new task (a1 contains new task) */
+	movel	%a1,%curptr
+
+	/* restore floating point context */
+#ifndef CONFIG_M68KFPU_EMU_ONLY
+#ifdef CONFIG_M68KFPU_EMU
+	tstl	m68k_fputype
+	jeq	4f
+#endif
+#if defined(CONFIG_M68060)
+#if !defined(CPU_M68060_ONLY)
+	btst	#3,m68k_cputype+3
+	beqs	1f
+#endif
+	/* The 060 FPU keeps status in bits 15-8 of the first longword */
+	tstb	%a1@(TASK_THREAD+THREAD_FPSTATE+2)
+	jeq	3f
+#if !defined(CPU_M68060_ONLY)
+	jra	2f
+#endif
+#endif /* CONFIG_M68060 */
+#if !defined(CPU_M68060_ONLY)
+1:	tstb	%a1@(TASK_THREAD+THREAD_FPSTATE)
+	jeq	3f
+#endif
+2:	fmovemx	%a1@(TASK_THREAD+THREAD_FPREG),%fp0-%fp7
+	fmoveml	%a1@(TASK_THREAD+THREAD_FPCNTL),%fpcr/%fpsr/%fpiar
+3:	frestore %a1@(TASK_THREAD+THREAD_FPSTATE)
+4:
+#endif	/* CONFIG_M68KFPU_EMU_ONLY */
+
+	/* restore the kernel stack pointer */
+	movel	%a1@(TASK_THREAD+THREAD_KSP),%sp
+
+	/* restore non-scratch registers */
+	RESTORE_SWITCH_STACK
+
+	/* restore user stack pointer */
+	movel	%a1@(TASK_THREAD+THREAD_USP),%a0
+	movel	%a0,%usp
+
+	/* restore fs (sfc,%dfc) */
+	movew	%a1@(TASK_THREAD+THREAD_FS),%a0
+	movec	%a0,%sfc
+	movec	%a0,%dfc
+
+	/* restore status register */
+	movew	%a1@(TASK_THREAD+THREAD_SR),%sr
+
+	rts
+
+.data
+ALIGN
+sys_call_table:
+	.long sys_restart_syscall	/* 0 - old "setup()" system call, used for restarting */
+	.long sys_exit
+	.long sys_fork
+	.long sys_read
+	.long sys_write
+	.long sys_open		/* 5 */
+	.long sys_close
+	.long sys_waitpid
+	.long sys_creat
+	.long sys_link
+	.long sys_unlink	/* 10 */
+	.long sys_execve
+	.long sys_chdir
+	.long sys_time
+	.long sys_mknod
+	.long sys_chmod		/* 15 */
+	.long sys_chown16
+	.long sys_ni_syscall				/* old break syscall holder */
+	.long sys_stat
+	.long sys_lseek
+	.long sys_getpid	/* 20 */
+	.long sys_mount
+	.long sys_oldumount
+	.long sys_setuid16
+	.long sys_getuid16
+	.long sys_stime		/* 25 */
+	.long sys_ptrace
+	.long sys_alarm
+	.long sys_fstat
+	.long sys_pause
+	.long sys_utime		/* 30 */
+	.long sys_ni_syscall				/* old stty syscall holder */
+	.long sys_ni_syscall				/* old gtty syscall holder */
+	.long sys_access
+	.long sys_nice
+	.long sys_ni_syscall	/* 35 */	/* old ftime syscall holder */
+	.long sys_sync
+	.long sys_kill
+	.long sys_rename
+	.long sys_mkdir
+	.long sys_rmdir		/* 40 */
+	.long sys_dup
+	.long sys_pipe
+	.long sys_times
+	.long sys_ni_syscall				/* old prof syscall holder */
+	.long sys_brk		/* 45 */
+	.long sys_setgid16
+	.long sys_getgid16
+	.long sys_signal
+	.long sys_geteuid16
+	.long sys_getegid16	/* 50 */
+	.long sys_acct
+	.long sys_umount				/* recycled never used phys() */
+	.long sys_ni_syscall				/* old lock syscall holder */
+	.long sys_ioctl
+	.long sys_fcntl		/* 55 */
+	.long sys_ni_syscall				/* old mpx syscall holder */
+	.long sys_setpgid
+	.long sys_ni_syscall				/* old ulimit syscall holder */
+	.long sys_ni_syscall
+	.long sys_umask		/* 60 */
+	.long sys_chroot
+	.long sys_ustat
+	.long sys_dup2
+	.long sys_getppid
+	.long sys_getpgrp	/* 65 */
+	.long sys_setsid
+	.long sys_sigaction
+	.long sys_sgetmask
+	.long sys_ssetmask
+	.long sys_setreuid16	/* 70 */
+	.long sys_setregid16
+	.long sys_sigsuspend
+	.long sys_sigpending
+	.long sys_sethostname
+	.long sys_setrlimit	/* 75 */
+	.long sys_old_getrlimit
+	.long sys_getrusage
+	.long sys_gettimeofday
+	.long sys_settimeofday
+	.long sys_getgroups16	/* 80 */
+	.long sys_setgroups16
+	.long sys_old_select
+	.long sys_symlink
+	.long sys_lstat
+	.long sys_readlink	/* 85 */
+	.long sys_uselib
+	.long sys_swapon
+	.long sys_reboot
+	.long sys_old_readdir
+	.long sys_old_mmap	/* 90 */
+	.long sys_munmap
+	.long sys_truncate
+	.long sys_ftruncate
+	.long sys_fchmod
+	.long sys_fchown16	/* 95 */
+	.long sys_getpriority
+	.long sys_setpriority
+	.long sys_ni_syscall				/* old profil syscall holder */
+	.long sys_statfs
+	.long sys_fstatfs	/* 100 */
+	.long sys_ni_syscall				/* ioperm for i386 */
+	.long sys_socketcall
+	.long sys_syslog
+	.long sys_setitimer
+	.long sys_getitimer	/* 105 */
+	.long sys_newstat
+	.long sys_newlstat
+	.long sys_newfstat
+	.long sys_ni_syscall
+	.long sys_ni_syscall	/* 110 */	/* iopl for i386 */
+	.long sys_vhangup
+	.long sys_ni_syscall				/* obsolete idle() syscall */
+	.long sys_ni_syscall				/* vm86old for i386 */
+	.long sys_wait4
+	.long sys_swapoff	/* 115 */
+	.long sys_sysinfo
+	.long sys_ipc
+	.long sys_fsync
+	.long sys_sigreturn
+	.long sys_clone		/* 120 */
+	.long sys_setdomainname
+	.long sys_newuname
+	.long sys_cacheflush				/* modify_ldt for i386 */
+	.long sys_adjtimex
+	.long sys_mprotect	/* 125 */
+	.long sys_sigprocmask
+	.long sys_ni_syscall		/* old "create_module" */
+	.long sys_init_module
+	.long sys_delete_module
+	.long sys_ni_syscall	/* 130 - old "get_kernel_syms" */
+	.long sys_quotactl
+	.long sys_getpgid
+	.long sys_fchdir
+	.long sys_bdflush
+	.long sys_sysfs		/* 135 */
+	.long sys_personality
+	.long sys_ni_syscall				/* for afs_syscall */
+	.long sys_setfsuid16
+	.long sys_setfsgid16
+	.long sys_llseek	/* 140 */
+	.long sys_getdents
+	.long sys_select
+	.long sys_flock
+	.long sys_msync
+	.long sys_readv		/* 145 */
+	.long sys_writev
+	.long sys_getsid
+	.long sys_fdatasync
+	.long sys_sysctl
+	.long sys_mlock		/* 150 */
+	.long sys_munlock
+	.long sys_mlockall
+	.long sys_munlockall
+	.long sys_sched_setparam
+	.long sys_sched_getparam	/* 155 */
+	.long sys_sched_setscheduler
+	.long sys_sched_getscheduler
+	.long sys_sched_yield
+	.long sys_sched_get_priority_max
+	.long sys_sched_get_priority_min  /* 160 */
+	.long sys_sched_rr_get_interval
+	.long sys_nanosleep
+	.long sys_mremap
+	.long sys_setresuid16
+	.long sys_getresuid16	/* 165 */
+	.long sys_getpagesize
+	.long sys_ni_syscall		/* old sys_query_module */
+	.long sys_poll
+	.long sys_nfsservctl
+	.long sys_setresgid16	/* 170 */
+	.long sys_getresgid16
+	.long sys_prctl
+	.long sys_rt_sigreturn
+	.long sys_rt_sigaction
+	.long sys_rt_sigprocmask	/* 175 */
+	.long sys_rt_sigpending
+	.long sys_rt_sigtimedwait
+	.long sys_rt_sigqueueinfo
+	.long sys_rt_sigsuspend
+	.long sys_pread64	/* 180 */
+	.long sys_pwrite64
+	.long sys_lchown16;
+	.long sys_getcwd
+	.long sys_capget
+	.long sys_capset	/* 185 */
+	.long sys_sigaltstack
+	.long sys_sendfile
+	.long sys_ni_syscall				/* streams1 */
+	.long sys_ni_syscall				/* streams2 */
+	.long sys_vfork		/* 190 */
+	.long sys_getrlimit
+	.long sys_mmap2
+	.long sys_truncate64
+	.long sys_ftruncate64
+	.long sys_stat64	/* 195 */
+	.long sys_lstat64
+	.long sys_fstat64
+	.long sys_chown
+	.long sys_getuid
+	.long sys_getgid	/* 200 */
+	.long sys_geteuid
+	.long sys_getegid
+	.long sys_setreuid
+	.long sys_setregid
+	.long sys_getgroups	/* 205 */
+	.long sys_setgroups
+	.long sys_fchown
+	.long sys_setresuid
+	.long sys_getresuid
+	.long sys_setresgid	/* 210 */
+	.long sys_getresgid
+	.long sys_lchown
+	.long sys_setuid
+	.long sys_setgid
+	.long sys_setfsuid	/* 215 */
+	.long sys_setfsgid
+	.long sys_pivot_root
+	.long sys_ni_syscall
+	.long sys_ni_syscall
+	.long sys_getdents64	/* 220 */
+	.long sys_gettid
+	.long sys_tkill
+	.long sys_setxattr
+	.long sys_lsetxattr
+	.long sys_fsetxattr	/* 225 */
+	.long sys_getxattr
+	.long sys_lgetxattr
+	.long sys_fgetxattr
+	.long sys_listxattr
+	.long sys_llistxattr	/* 230 */
+	.long sys_flistxattr
+	.long sys_removexattr
+	.long sys_lremovexattr
+	.long sys_fremovexattr
+	.long sys_futex		/* 235 */
+	.long sys_sendfile64
+	.long sys_mincore
+	.long sys_madvise
+	.long sys_fcntl64
+	.long sys_readahead	/* 240 */
+	.long sys_io_setup
+	.long sys_io_destroy
+	.long sys_io_getevents
+	.long sys_io_submit
+	.long sys_io_cancel	/* 245 */
+	.long sys_fadvise64
+	.long sys_exit_group
+	.long sys_lookup_dcookie
+	.long sys_epoll_create
+	.long sys_epoll_ctl	/* 250 */
+	.long sys_epoll_wait
+	.long sys_remap_file_pages
+	.long sys_set_tid_address
+	.long sys_timer_create
+	.long sys_timer_settime	/* 255 */
+	.long sys_timer_gettime
+	.long sys_timer_getoverrun
+	.long sys_timer_delete
+	.long sys_clock_settime
+	.long sys_clock_gettime	/* 260 */
+	.long sys_clock_getres
+	.long sys_clock_nanosleep
+	.long sys_statfs64
+	.long sys_fstatfs64
+	.long sys_tgkill	/* 265 */
+	.long sys_utimes
+	.long sys_fadvise64_64
+	.long sys_mbind
+	.long sys_get_mempolicy
+	.long sys_set_mempolicy	/* 270 */
+	.long sys_mq_open
+	.long sys_mq_unlink
+	.long sys_mq_timedsend
+	.long sys_mq_timedreceive
+	.long sys_mq_notify	/* 275 */
+	.long sys_mq_getsetattr
+	.long sys_waitid
+	.long sys_ni_syscall	/* for sys_vserver */
+	.long sys_add_key
+	.long sys_request_key	/* 280 */
+	.long sys_keyctl
+	.long sys_ioprio_set
+	.long sys_ioprio_get
+	.long sys_inotify_init
+	.long sys_inotify_add_watch	/* 285 */
+	.long sys_inotify_rm_watch
+	.long sys_migrate_pages
+	.long sys_openat
+	.long sys_mkdirat
+	.long sys_mknodat		/* 290 */
+	.long sys_fchownat
+	.long sys_futimesat
+	.long sys_fstatat64
+	.long sys_unlinkat
+	.long sys_renameat		/* 295 */
+	.long sys_linkat
+	.long sys_symlinkat
+	.long sys_readlinkat
+	.long sys_fchmodat
+	.long sys_faccessat		/* 300 */
+	.long sys_ni_syscall		/* Reserved for pselect6 */
+	.long sys_ni_syscall		/* Reserved for ppoll */
+	.long sys_unshare
+	.long sys_set_robust_list
+	.long sys_get_robust_list	/* 305 */
+	.long sys_splice
+	.long sys_sync_file_range
+	.long sys_tee
+	.long sys_vmsplice
+	.long sys_move_pages		/* 310 */
+	.long sys_sched_setaffinity
+	.long sys_sched_getaffinity
+	.long sys_kexec_load
+	.long sys_getcpu
+	.long sys_epoll_pwait		/* 315 */
+	.long sys_utimensat
+	.long sys_signalfd
+	.long sys_timerfd_create
+	.long sys_eventfd
+	.long sys_fallocate		/* 320 */
+	.long sys_timerfd_settime
+	.long sys_timerfd_gettime
+	.long sys_signalfd4
+	.long sys_eventfd2
+	.long sys_epoll_create1		/* 325 */
+	.long sys_dup3
+	.long sys_pipe2
+	.long sys_inotify_init1
+	.long sys_preadv
+	.long sys_pwritev		/* 330 */
+	.long sys_rt_tgsigqueueinfo
+	.long sys_perf_event_open
+	.long sys_get_thread_area
+	.long sys_set_thread_area
+	.long sys_atomic_cmpxchg_32	/* 335 */
+	.long sys_atomic_barrier
+	.long sys_fanotify_init
+	.long sys_fanotify_mark
+	.long sys_prlimit64
+

arch/m68k/kernel/m68k_ksyms.c

···
-#include <linux/module.h>
-
-asmlinkage long long __ashldi3 (long long, int);
-asmlinkage long long __ashrdi3 (long long, int);
-asmlinkage long long __lshrdi3 (long long, int);
-asmlinkage long long __muldi3 (long long, long long);
-
-/* The following are special because they're not called
-   explicitly (the C compiler generates them).  Fortunately,
-   their interface isn't gonna change any time soon now, so
-   it's OK to leave it out of version control.  */
-EXPORT_SYMBOL(__ashldi3);
-EXPORT_SYMBOL(__ashrdi3);
-EXPORT_SYMBOL(__lshrdi3);
-EXPORT_SYMBOL(__muldi3);
-
+#ifdef CONFIG_MMU
+#include "m68k_ksyms_mm.c"
+#else
+#include "m68k_ksyms_no.c"
+#endif

arch/m68k/kernel/m68k_ksyms_mm.c

···
+#include <linux/module.h>
+
+asmlinkage long long __ashldi3 (long long, int);
+asmlinkage long long __ashrdi3 (long long, int);
+asmlinkage long long __lshrdi3 (long long, int);
+asmlinkage long long __muldi3 (long long, long long);
+
+/* The following are special because they're not called
+   explicitly (the C compiler generates them).  Fortunately,
+   their interface isn't gonna change any time soon now, so
+   it's OK to leave it out of version control.  */
+EXPORT_SYMBOL(__ashldi3);
+EXPORT_SYMBOL(__ashrdi3);
+EXPORT_SYMBOL(__lshrdi3);
+EXPORT_SYMBOL(__muldi3);
+

arch/m68k/kernel/module.c

···
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file COPYING in the main directory of this archive
- * for more details.
- */
-
-#include <linux/moduleloader.h>
-#include <linux/elf.h>
-#include <linux/vmalloc.h>
-#include <linux/fs.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-
-#if 0
-#define DEBUGP printk
+#ifdef CONFIG_MMU
+#include "module_mm.c"
 #else
-#define DEBUGP(fmt...)
+#include "module_no.c"
 #endif
-
-#ifdef CONFIG_MODULES
-
-void *module_alloc(unsigned long size)
-{
-	if (size == 0)
-		return NULL;
-	return vmalloc(size);
-}
-
-
-/* Free memory returned from module_alloc */
-void module_free(struct module *mod, void *module_region)
-{
-	vfree(module_region);
-}
-
-/* We don't need anything special. */
-int module_frob_arch_sections(Elf_Ehdr *hdr,
-			      Elf_Shdr *sechdrs,
-			      char *secstrings,
-			      struct module *mod)
-{
-	return 0;
-}
-
-int apply_relocate(Elf32_Shdr *sechdrs,
-		   const char *strtab,
-		   unsigned int symindex,
-		   unsigned int relsec,
-		   struct module *me)
-{
-	unsigned int i;
-	Elf32_Rel *rel = (void *)sechdrs[relsec].sh_addr;
-	Elf32_Sym *sym;
-	uint32_t *location;
-
-	DEBUGP("Applying relocate section %u to %u\n", relsec,
-	       sechdrs[relsec].sh_info);
-	for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
-		/* This is where to make the change */
-		location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
-			+ rel[i].r_offset;
-		/* This is the symbol it is referring to.  Note that all
-		   undefined symbols have been resolved.  */
-		sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
-			+ ELF32_R_SYM(rel[i].r_info);
-
-		switch (ELF32_R_TYPE(rel[i].r_info)) {
-		case R_68K_32:
-			/* We add the value into the location given */
-			*location += sym->st_value;
-			break;
-		case R_68K_PC32:
-			/* Add the value, subtract its postition */
-			*location += sym->st_value - (uint32_t)location;
-			break;
-		default:
-			printk(KERN_ERR "module %s: Unknown relocation: %u\n",
-			       me->name, ELF32_R_TYPE(rel[i].r_info));
-			return -ENOEXEC;
-		}
-	}
-	return 0;
-}
-
-int apply_relocate_add(Elf32_Shdr *sechdrs,
-		       const char *strtab,
-		       unsigned int symindex,
-		       unsigned int relsec,
-		       struct module *me)
-{
-	unsigned int i;
-	Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr;
-	Elf32_Sym *sym;
-	uint32_t *location;
-
-	DEBUGP("Applying relocate_add section %u to %u\n", relsec,
-	       sechdrs[relsec].sh_info);
-	for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
-		/* This is where to make the change */
-		location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
-			+ rel[i].r_offset;
-		/* This is the symbol it is referring to.  Note that all
-		   undefined symbols have been resolved.  */
-		sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
-			+ ELF32_R_SYM(rel[i].r_info);
-
-		switch (ELF32_R_TYPE(rel[i].r_info)) {
-		case R_68K_32:
-			/* We add the value into the location given */
-			*location = rel[i].r_addend + sym->st_value;
-			break;
-		case R_68K_PC32:
-			/* Add the value, subtract its postition */
-			*location = rel[i].r_addend + sym->st_value - (uint32_t)location;
-			break;
-		default:
-			printk(KERN_ERR "module %s: Unknown relocation: %u\n",
-			       me->name, ELF32_R_TYPE(rel[i].r_info));
-			return -ENOEXEC;
-		}
-	}
-	return 0;
-}
-
-int module_finalize(const Elf_Ehdr *hdr,
-		    const Elf_Shdr *sechdrs,
-		    struct module *mod)
-{
-	module_fixup(mod, mod->arch.fixup_start, mod->arch.fixup_end);
-
-	return 0;
-}
-
-void module_arch_cleanup(struct module *mod)
-{
-}
-
-#endif /* CONFIG_MODULES */
-
-void module_fixup(struct module *mod, struct m68k_fixup_info *start,
-		  struct m68k_fixup_info *end)
-{
-	struct m68k_fixup_info *fixup;
-
-	for (fixup = start; fixup < end; fixup++) {
-		switch (fixup->type) {
-		case m68k_fixup_memoffset:
-			*(u32 *)fixup->addr = m68k_memoffset;
-			break;
-		case m68k_fixup_vnode_shift:
-			*(u16 *)fixup->addr += m68k_virt_to_node_shift;
-			break;
-		}
-	}
-}

arch/m68k/kernel/module_mm.c

···
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/moduleloader.h>
+#include <linux/elf.h>
+#include <linux/vmalloc.h>
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+
+#if 0
+#define DEBUGP printk
+#else
+#define DEBUGP(fmt...)
+#endif
+
+#ifdef CONFIG_MODULES
+
+void *module_alloc(unsigned long size)
+{
+	if (size == 0)
+		return NULL;
+	return vmalloc(size);
+}
+
+
+/* Free memory returned from module_alloc */
+void module_free(struct module *mod, void *module_region)
+{
+	vfree(module_region);
+}
+
+/* We don't need anything special. */
+int module_frob_arch_sections(Elf_Ehdr *hdr,
+			      Elf_Shdr *sechdrs,
+			      char *secstrings,
+			      struct module *mod)
+{
+	return 0;
+}
+
+int apply_relocate(Elf32_Shdr *sechdrs,
+		   const char *strtab,
+		   unsigned int symindex,
+		   unsigned int relsec,
+		   struct module *me)
+{
+	unsigned int i;
+	Elf32_Rel *rel = (void *)sechdrs[relsec].sh_addr;
+	Elf32_Sym *sym;
+	uint32_t *location;
+
+	DEBUGP("Applying relocate section %u to %u\n", relsec,
+	       sechdrs[relsec].sh_info);
+	for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
+		/* This is where to make the change */
+		location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
+			+ rel[i].r_offset;
+		/* This is the symbol it is referring to.  Note that all
+		   undefined symbols have been resolved.  */
+		sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
+			+ ELF32_R_SYM(rel[i].r_info);
+
+		switch (ELF32_R_TYPE(rel[i].r_info)) {
+		case R_68K_32:
+			/* We add the value into the location given */
+			*location += sym->st_value;
+			break;
+		case R_68K_PC32:
+			/* Add the value, subtract its postition */
+			*location += sym->st_value - (uint32_t)location;
+			break;
+		default:
+			printk(KERN_ERR "module %s: Unknown relocation: %u\n",
+			       me->name, ELF32_R_TYPE(rel[i].r_info));
+			return -ENOEXEC;
+		}
+	}
+	return 0;
+}
+
+int apply_relocate_add(Elf32_Shdr *sechdrs,
+		       const char *strtab,
+		       unsigned int symindex,
+		       unsigned int relsec,
+		       struct module *me)
+{
+	unsigned int i;
+	Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr;
+	Elf32_Sym *sym;
+	uint32_t *location;
+
+	DEBUGP("Applying relocate_add section %u to %u\n", relsec,
+	       sechdrs[relsec].sh_info);
+	for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
+		/* This is where to make the change */
+		location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
+			+ rel[i].r_offset;
+		/* This is the symbol it is referring to.  Note that all
+		   undefined symbols have been resolved.  */
+		sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
+			+ ELF32_R_SYM(rel[i].r_info);
+
+		switch (ELF32_R_TYPE(rel[i].r_info)) {
+		case R_68K_32:
+			/* We add the value into the location given */
+			*location = rel[i].r_addend + sym->st_value;
+			break;
+		case R_68K_PC32:
+			/* Add the value, subtract its postition */
+			*location = rel[i].r_addend + sym->st_value - (uint32_t)location;
+			break;
+		default:
+			printk(KERN_ERR "module %s: Unknown relocation: %u\n",
+			       me->name, ELF32_R_TYPE(rel[i].r_info));
+			return -ENOEXEC;
+		}
+	}
+	return 0;
+}
+
+int module_finalize(const Elf_Ehdr *hdr,
+		    const Elf_Shdr *sechdrs,
+		    struct module *mod)
+{
+	module_fixup(mod, mod->arch.fixup_start, mod->arch.fixup_end);
+
+	return 0;
+}
+
+void module_arch_cleanup(struct module *mod)
+{
+}
+
+#endif /* CONFIG_MODULES */
+
+void module_fixup(struct module *mod, struct m68k_fixup_info *start,
+		  struct m68k_fixup_info *end)
+{
+	struct m68k_fixup_info *fixup;
+
+	for (fixup = start; fixup < end; fixup++) {
+		switch (fixup->type) {
+		case m68k_fixup_memoffset:
+			*(u32 *)fixup->addr = m68k_memoffset;
+			break;
+		case m68k_fixup_vnode_shift:
+			*(u16 *)fixup->addr += m68k_virt_to_node_shift;
+			break;
+		}
+	}
+}

arch/m68k/kernel/process.c

···
-/*
- *  linux/arch/m68k/kernel/process.c
- *
- *  Copyright (C) 1995  Hamish Macdonald
- *
- *  68060 fixes by Jesper Skov
- */
-
-/*
- * This file handles the architecture-dependent parts of process handling..
- */
-
-#include <linux/errno.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include <linux/fs.h>
-#include <linux/smp.h>
-#include <linux/stddef.h>
-#include <linux/unistd.h>
-#include <linux/ptrace.h>
-#include <linux/user.h>
-#include <linux/reboot.h>
-#include <linux/init_task.h>
-#include <linux/mqueue.h>
-
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <asm/traps.h>
-#include <asm/machdep.h>
-#include <asm/setup.h>
-#include <asm/pgtable.h>
-
-/*
- * Initial task/thread structure. Make this a per-architecture thing,
- * because different architectures tend to have different
- * alignment requirements and potentially different initial
- * setup.
- */
-static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
-static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
-union thread_union init_thread_union __init_task_data
-	__attribute__((aligned(THREAD_SIZE))) =
-		{ INIT_THREAD_INFO(init_task) };
-
-/* initial task structure */
-struct task_struct init_task = INIT_TASK(init_task);
-
-EXPORT_SYMBOL(init_task);
-
-asmlinkage void ret_from_fork(void);
-
-
-/*
- * Return saved PC from a blocked thread
- */
-unsigned long thread_saved_pc(struct task_struct *tsk)
-{
-	struct switch_stack *sw = (struct switch_stack *)tsk->thread.ksp;
-	/* Check whether the thread is blocked in resume() */
-	if (in_sched_functions(sw->retpc))
-		return ((unsigned long *)sw->a6)[1];
-	else
-		return sw->retpc;
-}
-
-/*
- * The idle loop on an m68k..
- */
-static void default_idle(void)
-{
-	if (!need_resched())
-#if defined(MACH_ATARI_ONLY)
-		/* block out HSYNC on the atari (falcon) */
-		__asm__("stop #0x2200" : : : "cc");
+#ifdef CONFIG_MMU
+#include "process_mm.c"
 #else
-		__asm__("stop #0x2000" : : : "cc");
+#include "process_no.c"
 #endif
-}
-
-void (*idle)(void) = default_idle;
-
-/*
- * The idle thread. There's no useful work to be
- * done, so just try to conserve power and have a
- * low exit latency (ie sit in a loop waiting for
- * somebody to say that they'd like to reschedule)
- */
-void cpu_idle(void)
-{
-	/* endless idle loop with no priority at all */
-	while (1) {
-		while (!need_resched())
-			idle();
-		preempt_enable_no_resched();
-		schedule();
-		preempt_disable();
-	}
-}
-
-void machine_restart(char * __unused)
-{
-	if (mach_reset)
-		mach_reset();
-	for (;;);
-}
-
-void machine_halt(void)
-{
-	if (mach_halt)
-		mach_halt();
-	for (;;);
-}
-
-void machine_power_off(void)
-{
-	if (mach_power_off)
-		mach_power_off();
-	for (;;);
-}
-
-void (*pm_power_off)(void) = machine_power_off;
-EXPORT_SYMBOL(pm_power_off);
-
-void show_regs(struct pt_regs * regs)
-{
-	printk("\n");
-	printk("Format %02x  Vector: %04x  PC: %08lx  Status: %04x    %s\n",
-	       regs->format, regs->vector, regs->pc, regs->sr, print_tainted());
-	printk("ORIG_D0: %08lx  D0: %08lx  A2: %08lx  A1: %08lx\n",
-	       regs->orig_d0, regs->d0, regs->a2, regs->a1);
-	printk("A0: %08lx  D5: %08lx  D4: %08lx\n",
-	       regs->a0, regs->d5, regs->d4);
-	printk("D3: %08lx  D2: %08lx  D1: %08lx\n",
-	       regs->d3, regs->d2, regs->d1);
-	if (!(regs->sr & PS_S))
-		printk("USP: %08lx\n", rdusp());
-}
-
-/*
- * Create a kernel thread
- */
-int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
-{
-	int pid;
-	mm_segment_t fs;
-
-	fs = get_fs();
-	set_fs (KERNEL_DS);
-
-	{
-	register long retval __asm__ ("d0");
-	register long clone_arg __asm__ ("d1") = flags | CLONE_VM | CLONE_UNTRACED;
-
-	retval = __NR_clone;
-	__asm__ __volatile__
-	  ("clrl %%d2\n\t"
-	   "trap #0\n\t"		/* Linux/m68k system call */
-	   "tstl %0\n\t"		/* child or parent */
-	   "jne 1f\n\t"			/* parent - jump */
-	   "lea %%sp@(%c7),%6\n\t"	/* reload current */
-	   "movel %6@,%6\n\t"
-	   "movel %3,%%sp@-\n\t"	/* push argument */
-	   "jsr %4@\n\t"		/* call fn */
-	   "movel %0,%%d1\n\t"		/* pass exit value */
-	   "movel %2,%%d0\n\t"		/* exit */
-	   "trap #0\n"
-	   "1:"
-	   : "+d" (retval)
-	   : "i" (__NR_clone), "i" (__NR_exit),
-	     "r" (arg), "a" (fn), "d" (clone_arg), "r" (current),
-	     "i" (-THREAD_SIZE)
-	   : "d2");
-
-	pid = retval;
-	}
-
-	set_fs (fs);
-	return pid;
-}
-EXPORT_SYMBOL(kernel_thread);
-
-void flush_thread(void)
-{
-	unsigned long zero = 0;
-	set_fs(USER_DS);
-	current->thread.fs = __USER_DS;
-	if (!FPU_IS_EMU)
-		asm volatile (".chip 68k/68881\n\t"
-			      "frestore %0@\n\t"
-			      ".chip 68k" : : "a" (&zero));
-}
-
-/*
- * "m68k_fork()".. By the time we get here, the
- * non-volatile registers have also been saved on the
- * stack. We do some ugly pointer stuff here.. (see
- * also copy_thread)
- */
-
-asmlinkage int m68k_fork(struct pt_regs *regs)
-{
-	return do_fork(SIGCHLD, rdusp(), regs, 0, NULL, NULL);
-}
-
-asmlinkage int m68k_vfork(struct pt_regs *regs)
-{
-	return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(), regs, 0,
-		       NULL, NULL);
-}
-
-asmlinkage int m68k_clone(struct pt_regs *regs)
-{
-	unsigned long clone_flags;
-	unsigned long newsp;
-	int __user *parent_tidptr, *child_tidptr;
-
-	/* syscall2 puts clone_flags in d1 and usp in d2 */
-	clone_flags = regs->d1;
-	newsp = regs->d2;
-	parent_tidptr = (int __user *)regs->d3;
-	child_tidptr = (int __user *)regs->d4;
-	if (!newsp)
-		newsp = rdusp();
-	return do_fork(clone_flags, newsp, regs, 0,
-		       parent_tidptr, child_tidptr);
-}
-
-int copy_thread(unsigned long clone_flags, unsigned long usp,
-		 unsigned long unused,
-		 struct task_struct * p, struct pt_regs * regs)
-{
-	struct pt_regs * childregs;
-	struct switch_stack * childstack, *stack;
-	unsigned long *retp;
-
-	childregs = (struct pt_regs *) (task_stack_page(p) + THREAD_SIZE) - 1;
-
-	*childregs = *regs;
-	childregs->d0 = 0;
-
-	retp = ((unsigned long *) regs);
-	stack = ((struct switch_stack *) retp) - 1;
-
-	childstack = ((struct switch_stack *) childregs) - 1;
-	*childstack = *stack;
-	childstack->retpc = (unsigned long)ret_from_fork;
-
-	p->thread.usp = usp;
-	p->thread.ksp = (unsigned long)childstack;
-
-	if (clone_flags & CLONE_SETTLS)
-		task_thread_info(p)->tp_value = regs->d5;
-
-	/*
-	 * Must save the current SFC/DFC value, NOT the value when
-	 * the parent was last descheduled - RGH  10-08-96
-	 */
-	p->thread.fs = get_fs().seg;
-
-	if (!FPU_IS_EMU) {
-		/* Copy the current fpu state */
-		asm volatile ("fsave %0" : : "m" (p->thread.fpstate[0]) : "memory");
-
-		if (!CPU_IS_060 ? p->thread.fpstate[0] : p->thread.fpstate[2])
-		  asm volatile ("fmovemx %/fp0-%/fp7,%0\n\t"
-				"fmoveml %/fpiar/%/fpcr/%/fpsr,%1"
-				: : "m" (p->thread.fp[0]), "m" (p->thread.fpcntl[0])
-				: "memory");
-		/* Restore the state in case the fpu was busy */
-		asm volatile ("frestore %0" : : "m" (p->thread.fpstate[0]));
-	}
-
-	return 0;
-}
-
-/* Fill in the fpu structure for a core dump.  */
-
-int dump_fpu (struct pt_regs *regs, struct user_m68kfp_struct *fpu)
-{
-	char fpustate[216];
-
-	if (FPU_IS_EMU) {
-		int i;
-
-		memcpy(fpu->fpcntl, current->thread.fpcntl, 12);
-		memcpy(fpu->fpregs, current->thread.fp, 96);
-		/* Convert internal fpu reg representation
-		 * into long double format
-		 */
-		for (i = 0; i < 24; i += 3)
-			fpu->fpregs[i] = ((fpu->fpregs[i] & 0xffff0000) << 15) |
-			                 ((fpu->fpregs[i] & 0x0000ffff) << 16);
-		return 1;
-	}
-
-	/* First dump the fpu context to avoid protocol violation.  */
-	asm volatile ("fsave %0" :: "m" (fpustate[0]) : "memory");
-	if (!CPU_IS_060 ? !fpustate[0] : !fpustate[2])
-		return 0;
-
-	asm volatile ("fmovem %/fpiar/%/fpcr/%/fpsr,%0"
-		:: "m" (fpu->fpcntl[0])
-		: "memory");
-	asm volatile ("fmovemx %/fp0-%/fp7,%0"
-		:: "m" (fpu->fpregs[0])
-		: "memory");
-	return 1;
-}
-EXPORT_SYMBOL(dump_fpu);
-
-/*
- * sys_execve() executes a new program.
- */
-asmlinkage int sys_execve(const char __user *name,
-			  const char __user *const __user *argv,
-			  const char __user *const __user *envp)
-{
-	int error;
-	char * filename;
-	struct pt_regs *regs = (struct pt_regs *) &name;
-
-	filename = getname(name);
-	error = PTR_ERR(filename);
-	if (IS_ERR(filename))
-		return error;
-	error = do_execve(filename, argv, envp, regs);
-	putname(filename);
-	return error;
-}
-
-unsigned long get_wchan(struct task_struct *p)
-{
-	unsigned long fp, pc;
-	unsigned long stack_page;
-	int count = 0;
-	if (!p || p == current || p->state == TASK_RUNNING)
-		return 0;
-
-	stack_page = (unsigned long)task_stack_page(p);
-	fp = ((struct switch_stack *)p->thread.ksp)->a6;
-	do {
-		if (fp < stack_page+sizeof(struct thread_info) ||
-		    fp >= 8184+stack_page)
-			return 0;
-		pc = ((unsigned long *)fp)[1];
-		if (!in_sched_functions(pc))
-			return pc;
-		fp = *(unsigned long *) fp;
-	} while (count++ < 16);
-	return 0;
-}

arch/m68k/kernel/process_mm.c

···
+/*
+ *  linux/arch/m68k/kernel/process.c
+ *
+ *  Copyright (C) 1995  Hamish Macdonald
+ *
+ *  68060 fixes by Jesper Skov
+ */
+
+/*
+ * This file handles the architecture-dependent parts of process handling..
+ */
+
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/smp.h>
+#include <linux/stddef.h>
+#include <linux/unistd.h>
+#include <linux/ptrace.h>
+#include <linux/user.h>
+#include <linux/reboot.h>
+#include <linux/init_task.h>
+#include <linux/mqueue.h>
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/traps.h>
+#include <asm/machdep.h>
+#include <asm/setup.h>
+#include <asm/pgtable.h>
+
+/*
+ * Initial task/thread structure. Make this a per-architecture thing,
+ * because different architectures tend to have different
+ * alignment requirements and potentially different initial
+ * setup.
+ */
+static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
+static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
+union thread_union init_thread_union __init_task_data
+	__attribute__((aligned(THREAD_SIZE))) =
+		{ INIT_THREAD_INFO(init_task) };
+
+/* initial task structure */
+struct task_struct init_task = INIT_TASK(init_task);
+
+EXPORT_SYMBOL(init_task);
+
+asmlinkage void ret_from_fork(void);
+
+
+/*
+ * Return saved PC from a blocked thread
+ */
+unsigned long thread_saved_pc(struct task_struct *tsk)
+{
+	struct switch_stack *sw = (struct switch_stack *)tsk->thread.ksp;
+	/* Check whether the thread is blocked in resume() */
+	if (in_sched_functions(sw->retpc))
+		return ((unsigned long *)sw->a6)[1];
+	else
+		return sw->retpc;
+}
+
+/*
+ * The idle loop on an m68k..
+ */
+static void default_idle(void)
+{
+	if (!need_resched())
+#if defined(MACH_ATARI_ONLY)
+		/* block out HSYNC on the atari (falcon) */
+		__asm__("stop #0x2200" : : : "cc");
+#else
+		__asm__("stop #0x2000" : : : "cc");
+#endif
+}
+
+void (*idle)(void) = default_idle;
+
+/*
+ * The idle thread. There's no useful work to be
+ * done, so just try to conserve power and have a
+ * low exit latency (ie sit in a loop waiting for
+ * somebody to say that they'd like to reschedule)
+ */
+void cpu_idle(void)
+{
+	/* endless idle loop with no priority at all */
+	while (1) {
+		while (!need_resched())
+			idle();
+		preempt_enable_no_resched();
+		schedule();
+		preempt_disable();
+	}
+}
+
+void machine_restart(char * __unused)
+{
+	if (mach_reset)
+		mach_reset();
+	for (;;);
+}
+
+void machine_halt(void)
+{
+	if (mach_halt)
+		mach_halt();
+	for (;;);
+}
+
+void machine_power_off(void)
+{
+	if (mach_power_off)
+		mach_power_off();
+	for (;;);
+}
+
+void (*pm_power_off)(void) = machine_power_off;
+EXPORT_SYMBOL(pm_power_off);
+
+void show_regs(struct pt_regs * regs)
+{
+	printk("\n");
+	printk("Format %02x  Vector: %04x  PC: %08lx  Status: %04x    %s\n",
+	       regs->format, regs->vector, regs->pc, regs->sr, print_tainted());
+	printk("ORIG_D0: %08lx  D0: %08lx  A2: %08lx  A1: %08lx\n",
+	       regs->orig_d0, regs->d0, regs->a2, regs->a1);
+	printk("A0: %08lx  D5: %08lx  D4: %08lx\n",
+	       regs->a0, regs->d5, regs->d4);
+	printk("D3: %08lx  D2: %08lx  D1: %08lx\n",
+	       regs->d3, regs->d2, regs->d1);
+	if (!(regs->sr & PS_S))
+		printk("USP: %08lx\n", rdusp());
+}
+
+/*
+ * Create a kernel thread
+ */
+int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
+{
+	int pid;
+	mm_segment_t fs;
+
+	fs = get_fs();
+	set_fs (KERNEL_DS);
+
+	{
+	register long retval __asm__ ("d0");
+	register long clone_arg __asm__ ("d1") = flags | CLONE_VM | CLONE_UNTRACED;
+
+	retval = __NR_clone;
+	__asm__ __volatile__
+	  ("clrl %%d2\n\t"
+	   "trap #0\n\t"		/* Linux/m68k system call */
+	   "tstl %0\n\t"		/* child or parent */
+	   "jne 1f\n\t"			/* parent - jump */
+	   "lea %%sp@(%c7),%6\n\t"	/* reload current */
+	   "movel %6@,%6\n\t"
+	   "movel %3,%%sp@-\n\t"	/* push argument */
+	   "jsr %4@\n\t"		/* call fn */
+	   "movel %0,%%d1\n\t"		/* pass exit value */
+	   "movel %2,%%d0\n\t"		/* exit */
+	   "trap #0\n"
+	   "1:"
+	   : "+d" (retval)
+	   : "i" (__NR_clone), "i" (__NR_exit),
+	     "r" (arg), "a" (fn), "d" (clone_arg), "r" (current),
+	     "i" (-THREAD_SIZE)
+	   : "d2");
+
+	pid = retval;
+	}
+
+	set_fs (fs);
+	return pid;
+}
+EXPORT_SYMBOL(kernel_thread);
+
+void flush_thread(void)
+{
+	unsigned long zero = 0;
+	set_fs(USER_DS);
+	current->thread.fs = __USER_DS;
+	if (!FPU_IS_EMU)
+		asm volatile (".chip 68k/68881\n\t"
+			      "frestore %0@\n\t"
+			      ".chip 68k" : : "a" (&zero));
+}
+
+/*
+ * "m68k_fork()".. By the time we get here, the
+ * non-volatile registers have also been saved on the
+ * stack. We do some ugly pointer stuff here.. (see
+ * also copy_thread)
+ */
+
+asmlinkage int m68k_fork(struct pt_regs *regs)
+{
+	return do_fork(SIGCHLD, rdusp(), regs, 0, NULL, NULL);
+}
+
+asmlinkage int m68k_vfork(struct pt_regs *regs)
+{
+	return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(), regs, 0,
+		       NULL, NULL);
+}
+
+asmlinkage int m68k_clone(struct pt_regs *regs)
+{
+	unsigned long clone_flags;
+	unsigned long newsp;
+	int __user *parent_tidptr, *child_tidptr;
+
+	/* syscall2 puts clone_flags in d1 and usp in d2 */
+	clone_flags = regs->d1;
+	newsp = regs->d2;
+	parent_tidptr = (int __user *)regs->d3;
+	child_tidptr = (int __user *)regs->d4;
+	if (!newsp)
+		newsp = rdusp();
+	return do_fork(clone_flags, newsp, regs, 0,
+		       parent_tidptr, child_tidptr);
+}
+
+int copy_thread(unsigned long clone_flags, unsigned long usp,
+		 unsigned long unused,
+		 struct task_struct * p, struct pt_regs * regs)
+{
+	struct pt_regs * childregs;
+	struct switch_stack * childstack, *stack;
+	unsigned long *retp;
+
+	childregs = (struct pt_regs *) (task_stack_page(p) + THREAD_SIZE) - 1;
+
+	*childregs = *regs;
+	childregs->d0 = 0;
+
+	retp = ((unsigned long *) regs);
+	stack = ((struct switch_stack *) retp) - 1;
+
+	childstack = ((struct switch_stack *) childregs) - 1;
+	*childstack = *stack;
+	childstack->retpc = (unsigned long)ret_from_fork;
+
+	p->thread.usp = usp;
+	p->thread.ksp = (unsigned long)childstack;
+
+	if (clone_flags & CLONE_SETTLS)
+		task_thread_info(p)->tp_value = regs->d5;
+
+	/*
+	 * Must save the current SFC/DFC value, NOT the value when
+	 * the parent was last descheduled - RGH  10-08-96
+	 */
+	p->thread.fs = get_fs().seg;
+
+	if (!FPU_IS_EMU) {
+		/* Copy the current fpu state */
+		asm volatile ("fsave %0" : : "m" (p->thread.fpstate[0]) : "memory");
+
+		if (!CPU_IS_060 ? p->thread.fpstate[0] : p->thread.fpstate[2])
+		  asm volatile ("fmovemx %/fp0-%/fp7,%0\n\t"
+				"fmoveml %/fpiar/%/fpcr/%/fpsr,%1"
+				: : "m" (p->thread.fp[0]), "m" (p->thread.fpcntl[0])
+				: "memory");
+		/* Restore the state in case the fpu was busy */
+		asm volatile ("frestore %0" : : "m" (p->thread.fpstate[0]));
+	}
+
+	return 0;
+}
+
+/* Fill in the fpu structure for a core dump.  */
+
+int dump_fpu (struct pt_regs *regs, struct user_m68kfp_struct *fpu)
+{
+	char fpustate[216];
+
+	if (FPU_IS_EMU) {
+		int i;
+
+		memcpy(fpu->fpcntl, current->thread.fpcntl, 12);
+		memcpy(fpu->fpregs, current->thread.fp, 96);
+		/* Convert internal fpu reg representation
+		 * into long double format
+		 */
+		for (i = 0; i < 24; i += 3)
+			fpu->fpregs[i] = ((fpu->fpregs[i] & 0xffff0000) << 15) |
+			                 ((fpu->fpregs[i] & 0x0000ffff) << 16);
+		return 1;
+	}
+
+	/* First dump the fpu context to avoid protocol violation.  */
+	asm volatile ("fsave %0" :: "m" (fpustate[0]) : "memory");
+	if (!CPU_IS_060 ? !fpustate[0] : !fpustate[2])
+		return 0;
+
+	asm volatile ("fmovem %/fpiar/%/fpcr/%/fpsr,%0"
+		:: "m" (fpu->fpcntl[0])
+		: "memory");
+	asm volatile ("fmovemx %/fp0-%/fp7,%0"
+		:: "m" (fpu->fpregs[0])
+		: "memory");
+	return 1;
+}
+EXPORT_SYMBOL(dump_fpu);
+
+/*
+ * sys_execve() executes a new program.
+ */
+asmlinkage int sys_execve(const char __user *name,
+			  const char __user *const __user *argv,
+			  const char __user *const __user *envp)
+{
+	int error;
+	char * filename;
+	struct pt_regs *regs = (struct pt_regs *) &name;
+
+	filename = getname(name);
+	error = PTR_ERR(filename);
+	if (IS_ERR(filename))
+		return error;
+	error = do_execve(filename, argv, envp, regs);
+	putname(filename);
+	return error;
+}
+
+unsigned long get_wchan(struct task_struct *p)
+{
+	unsigned long fp, pc;
+	unsigned long stack_page;
+	int count = 0;
+	if (!p || p == current || p->state == TASK_RUNNING)
+		return 0;
+
+	stack_page = (unsigned long)task_stack_page(p);
+	fp = ((struct switch_stack *)p->thread.ksp)->a6;
+	do {
+		if (fp < stack_page+sizeof(struct thread_info) ||
+		    fp >= 8184+stack_page)
+			return 0;
+		pc = ((unsigned long *)fp)[1];
+		if (!in_sched_functions(pc))
+			return pc;
+		fp = *(unsigned long *) fp;
+	} while (count++ < 16);
+	return 0;
+}

arch/m68k/kernel/ptrace.c

···
-/*
- *  linux/arch/m68k/kernel/ptrace.c
- *
- *  Copyright (C) 1994 by Hamish Macdonald
- *  Taken from linux/kernel/ptrace.c and modified for M680x0.
- *  linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
- *
- * This file is subject to the terms and conditions of the GNU General
- * Public License.  See the file COPYING in the main directory of
- * this archive for more details.
- */
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/errno.h>
-#include <linux/ptrace.h>
-#include <linux/user.h>
-#include <linux/signal.h>
-
-#include <asm/uaccess.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/processor.h>
-
-/*
- * does not yet catch signals sent when the child dies.
- * in exit.c or in signal.c.
- */
-
-/* determines which bits in the SR the user has access to. */
-/* 1 = access 0 = no access */
-#define SR_MASK 0x001f
-
-/* sets the trace bits. */
-#define TRACE_BITS 0xC000
-#define T1_BIT 0x8000
-#define T0_BIT 0x4000
-
-/* Find the stack offset for a register, relative to thread.esp0. */
-#define PT_REG(reg)	((long)&((struct pt_regs *)0)->reg)
-#define SW_REG(reg)	((long)&((struct switch_stack *)0)->reg \
-			 - sizeof(struct switch_stack))
-/* Mapping from PT_xxx to the stack offset at which the register is
-   saved.  Notice that usp has no stack-slot and needs to be treated
-   specially (see get_reg/put_reg below). */
-static const int regoff[] = {
-	[0]	= PT_REG(d1),
-	[1]	= PT_REG(d2),
-	[2]	= PT_REG(d3),
-	[3]	= PT_REG(d4),
-	[4]	= PT_REG(d5),
-	[5]	= SW_REG(d6),
-	[6]	= SW_REG(d7),
-	[7]	= PT_REG(a0),
-	[8]	= PT_REG(a1),
-	[9]	= PT_REG(a2),
-	[10]	= SW_REG(a3),
-	[11]	= SW_REG(a4),
-	[12]	= SW_REG(a5),
-	[13]	= SW_REG(a6),
-	[14]	= PT_REG(d0),
-	[15]	= -1,
-	[16]	= PT_REG(orig_d0),
-	[17]	= PT_REG(sr),
-	[18]	= PT_REG(pc),
-};
-
-/*
- * Get contents of register REGNO in task TASK.
- */
-static inline long get_reg(struct task_struct *task, int regno)
-{
-	unsigned long *addr;
-
-	if (regno == PT_USP)
-		addr = &task->thread.usp;
-	else if (regno < ARRAY_SIZE(regoff))
-		addr = (unsigned long *)(task->thread.esp0 + regoff[regno]);
-	else
-		return 0;
-	/* Need to take stkadj into account. */
-	if (regno == PT_SR || regno == PT_PC) {
-		long stkadj = *(long *)(task->thread.esp0 + PT_REG(stkadj));
-		addr = (unsigned long *) ((unsigned long)addr + stkadj);
-		/* The sr is actually a 16 bit register.  */
-		if (regno == PT_SR)
-			return *(unsigned short *)addr;
-	}
-	return *addr;
-}
-
-/*
- * Write contents of register REGNO in task TASK.
- */
-static inline int put_reg(struct task_struct *task, int regno,
-			  unsigned long data)
-{
-	unsigned long *addr;
-
-	if (regno == PT_USP)
-		addr = &task->thread.usp;
-	else if (regno < ARRAY_SIZE(regoff))
-		addr = (unsigned long *)(task->thread.esp0 + regoff[regno]);
-	else
-		return -1;
-	/* Need to take stkadj into account. */
-	if (regno == PT_SR || regno == PT_PC) {
-		long stkadj = *(long *)(task->thread.esp0 + PT_REG(stkadj));
-		addr = (unsigned long *) ((unsigned long)addr + stkadj);
-		/* The sr is actually a 16 bit register.  */
-		if (regno == PT_SR) {
-			*(unsigned short *)addr = data;
-			return 0;
-		}
-	}
-	*addr = data;
-	return 0;
-}
-
-/*
- * Make sure the single step bit is not set.
- */
-static inline void singlestep_disable(struct task_struct *child)
-{
-	unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS;
-	put_reg(child, PT_SR, tmp);
-	clear_tsk_thread_flag(child, TIF_DELAYED_TRACE);
-}
-
-/*
- * Called by kernel/ptrace.c when detaching..
- */
-void ptrace_disable(struct task_struct *child)
-{
-	singlestep_disable(child);
-}
-
-void user_enable_single_step(struct task_struct *child)
-{
-	unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS;
-	put_reg(child, PT_SR, tmp | T1_BIT);
-	set_tsk_thread_flag(child, TIF_DELAYED_TRACE);
-}
-
-void user_enable_block_step(struct task_struct *child)
-{
-	unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS;
-	put_reg(child, PT_SR, tmp | T0_BIT);
-}
-
-void user_disable_single_step(struct task_struct *child)
-{
-	singlestep_disable(child);
-}
-
-long arch_ptrace(struct task_struct *child, long request,
-		 unsigned long addr, unsigned long data)
-{
-	unsigned long tmp;
-	int i, ret = 0;
-	int regno = addr >> 2; /* temporary hack. */
-	unsigned long __user *datap = (unsigned long __user *) data;
-
-	switch (request) {
-	/* read the word at location addr in the USER area. */
-	case PTRACE_PEEKUSR:
-		if (addr & 3)
-			goto out_eio;
-
-		if (regno >= 0 && regno < 19) {
-			tmp = get_reg(child, regno);
-		} else if (regno >= 21 && regno < 49) {
-			tmp = child->thread.fp[regno - 21];
-			/* Convert internal fpu reg representation
-			 * into long double format
-			 */
-			if (FPU_IS_EMU && (regno < 45) && !(regno % 3))
-				tmp = ((tmp & 0xffff0000) << 15) |
-				      ((tmp & 0x0000ffff) << 16);
-		} else
-			goto out_eio;
-		ret = put_user(tmp, datap);
-		break;
-
-	case PTRACE_POKEUSR:
-	/* write the word at location addr in the USER area */
-		if (addr & 3)
-			goto out_eio;
-
-		if (regno == PT_SR) {
-			data &= SR_MASK;
-			data |= get_reg(child, PT_SR) & ~SR_MASK;
-		}
-		if (regno >= 0 && regno < 19) {
-			if (put_reg(child, regno, data))
-				goto out_eio;
-		} else if (regno >= 21 && regno < 48) {
-			/* Convert long double format
-			 * into internal fpu reg representation
-			 */
-			if (FPU_IS_EMU && (regno < 45) && !(regno % 3)) {
-				data <<= 15;
-				data = (data & 0xffff0000) |
-				       ((data & 0x0000ffff) >> 1);
-			}
-			child->thread.fp[regno - 21] = data;
-		} else
-			goto out_eio;
-		break;
-
-	case PTRACE_GETREGS:	/* Get all gp regs from the child. */
-		for (i = 0; i < 19; i++) {
-			tmp = get_reg(child, i);
-			ret = put_user(tmp, datap);
-			if (ret)
-				break;
-			datap++;
-		}
-		break;
-
-	case PTRACE_SETREGS:	/* Set all gp regs in the child. */
-		for (i = 0; i < 19; i++) {
-			ret = get_user(tmp, datap);
-			if (ret)
-				break;
-			if (i == PT_SR) {
-				tmp &= SR_MASK;
-				tmp |= get_reg(child, PT_SR) & ~SR_MASK;
-			}
-			put_reg(child, i, tmp);
-			datap++;
-		}
-		break;
-
-	case PTRACE_GETFPREGS:	/* Get the child FPU state. */
-		if (copy_to_user(datap, &child->thread.fp,
-				 sizeof(struct user_m68kfp_struct)))
-			ret = -EFAULT;
-		break;
-
-	case PTRACE_SETFPREGS:	/* Set the child FPU state. */
-		if (copy_from_user(&child->thread.fp, datap,
-				   sizeof(struct user_m68kfp_struct)))
-			ret = -EFAULT;
-		break;
-
-	case PTRACE_GET_THREAD_AREA:
-		ret = put_user(task_thread_info(child)->tp_value, datap);
-		break;
-
-	default:
-		ret = ptrace_request(child, request, addr, data);
-		break;
-	}
-
-	return ret;
-out_eio:
-	return -EIO;
-}
-
-asmlinkage void syscall_trace(void)
-{
-	ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
-				 ? 0x80 : 0));
-	/*
-	 * this isn't the same as continuing with a signal, but it will do
-	 * for normal use.  strace only continues with a signal if the
-	 * stopping signal is not SIGTRAP.  -brl
-	 */
-	if (current->exit_code) {
-		send_sig(current->exit_code, current, 1);
-		current->exit_code = 0;
-	}
-}
+#ifdef CONFIG_MMU
+#include "ptrace_mm.c"
+#else
+#include "ptrace_no.c"
+#endif

arch/m68k/kernel/ptrace_mm.c

···
+/*
+ *  linux/arch/m68k/kernel/ptrace.c
+ *
+ *  Copyright (C) 1994 by Hamish Macdonald
+ *  Taken from linux/kernel/ptrace.c and modified for M680x0.
+ *  linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file COPYING in the main directory of
+ * this archive for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/errno.h>
+#include <linux/ptrace.h>
+#include <linux/user.h>
+#include <linux/signal.h>
+
+#include <asm/uaccess.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/system.h>
+#include <asm/processor.h>
+
+/*
+ * does not yet catch signals sent when the child dies.
+ * in exit.c or in signal.c.
+ */
+
+/* determines which bits in the SR the user has access to. */
+/* 1 = access 0 = no access */
+#define SR_MASK 0x001f
+
+/* sets the trace bits. */
+#define TRACE_BITS 0xC000
+#define T1_BIT 0x8000
+#define T0_BIT 0x4000
+
+/* Find the stack offset for a register, relative to thread.esp0. */
+#define PT_REG(reg)	((long)&((struct pt_regs *)0)->reg)
+#define SW_REG(reg)	((long)&((struct switch_stack *)0)->reg \
+			 - sizeof(struct switch_stack))
+/* Mapping from PT_xxx to the stack offset at which the register is
+   saved.  Notice that usp has no stack-slot and needs to be treated
+   specially (see get_reg/put_reg below). */
+static const int regoff[] = {
+	[0]	= PT_REG(d1),
+	[1]	= PT_REG(d2),
+	[2]	= PT_REG(d3),
+	[3]	= PT_REG(d4),
+	[4]	= PT_REG(d5),
+	[5]	= SW_REG(d6),
+	[6]	= SW_REG(d7),
+	[7]	= PT_REG(a0),
+	[8]	= PT_REG(a1),
+	[9]	= PT_REG(a2),
+	[10]	= SW_REG(a3),
+	[11]	= SW_REG(a4),
+	[12]	= SW_REG(a5),
+	[13]	= SW_REG(a6),
+	[14]	= PT_REG(d0),
+	[15]	= -1,
+	[16]	= PT_REG(orig_d0),
+	[17]	= PT_REG(sr),
+	[18]	= PT_REG(pc),
+};
+
+/*
+ * Get contents of register REGNO in task TASK.
+ */
+static inline long get_reg(struct task_struct *task, int regno)
+{
+	unsigned long *addr;
+
+	if (regno == PT_USP)
+		addr = &task->thread.usp;
+	else if (regno < ARRAY_SIZE(regoff))
+		addr = (unsigned long *)(task->thread.esp0 + regoff[regno]);
+	else
+		return 0;
+	/* Need to take stkadj into account. */
+	if (regno == PT_SR || regno == PT_PC) {
+		long stkadj = *(long *)(task->thread.esp0 + PT_REG(stkadj));
+		addr = (unsigned long *) ((unsigned long)addr + stkadj);
+		/* The sr is actually a 16 bit register.  */
+		if (regno == PT_SR)
+			return *(unsigned short *)addr;
+	}
+	return *addr;
+}
+
+/*
+ * Write contents of register REGNO in task TASK.
+ */
+static inline int put_reg(struct task_struct *task, int regno,
+			  unsigned long data)
+{
+	unsigned long *addr;
+
+	if (regno == PT_USP)
+		addr = &task->thread.usp;
+	else if (regno < ARRAY_SIZE(regoff))
+		addr = (unsigned long *)(task->thread.esp0 + regoff[regno]);
+	else
+		return -1;
+	/* Need to take stkadj into account. */
+	if (regno == PT_SR || regno == PT_PC) {
+		long stkadj = *(long *)(task->thread.esp0 + PT_REG(stkadj));
+		addr = (unsigned long *) ((unsigned long)addr + stkadj);
+		/* The sr is actually a 16 bit register.  */
+		if (regno == PT_SR) {
+			*(unsigned short *)addr = data;
+			return 0;
+		}
+	}
+	*addr = data;
+	return 0;
+}
+
+/*
+ * Make sure the single step bit is not set.
+ */
+static inline void singlestep_disable(struct task_struct *child)
+{
+	unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS;
+	put_reg(child, PT_SR, tmp);
+	clear_tsk_thread_flag(child, TIF_DELAYED_TRACE);
+}
+
+/*
+ * Called by kernel/ptrace.c when detaching..
+ */
+void ptrace_disable(struct task_struct *child)
+{
+	singlestep_disable(child);
+}
+
+void user_enable_single_step(struct task_struct *child)
+{
+	unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS;
+	put_reg(child, PT_SR, tmp | T1_BIT);
+	set_tsk_thread_flag(child, TIF_DELAYED_TRACE);
+}
+
+void user_enable_block_step(struct task_struct *child)
+{
+	unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS;
+	put_reg(child, PT_SR, tmp | T0_BIT);
+}
+
+void user_disable_single_step(struct task_struct *child)
+{
+	singlestep_disable(child);
+}
+
+long arch_ptrace(struct task_struct *child, long request,
+		 unsigned long addr, unsigned long data)
+{
+	unsigned long tmp;
+	int i, ret = 0;
+	int regno = addr >> 2; /* temporary hack. */
+	unsigned long __user *datap = (unsigned long __user *) data;
+
+	switch (request) {
+	/* read the word at location addr in the USER area. */
+	case PTRACE_PEEKUSR:
+		if (addr & 3)
+			goto out_eio;
+
+		if (regno >= 0 && regno < 19) {
+			tmp = get_reg(child, regno);
+		} else if (regno >= 21 && regno < 49) {
+			tmp = child->thread.fp[regno - 21];
+			/* Convert internal fpu reg representation
+			 * into long double format
+			 */
+			if (FPU_IS_EMU && (regno < 45) && !(regno % 3))
+				tmp = ((tmp & 0xffff0000) << 15) |
+				      ((tmp & 0x0000ffff) << 16);
+		} else
+			goto out_eio;
+		ret = put_user(tmp, datap);
+		break;
+
+	case PTRACE_POKEUSR:
+	/* write the word at location addr in the USER area */
+		if (addr & 3)
+			goto out_eio;
+
+		if (regno == PT_SR) {
+			data &= SR_MASK;
+			data |= get_reg(child, PT_SR) & ~SR_MASK;
+		}
+		if (regno >= 0 && regno < 19) {
+			if (put_reg(child, regno, data))
+				goto out_eio;
+		} else if (regno >= 21 && regno < 48) {
+			/* Convert long double format
+			 * into internal fpu reg representation
+			 */
+			if (FPU_IS_EMU && (regno < 45) && !(regno % 3)) {
+				data <<= 15;
+				data = (data & 0xffff0000) |
+				       ((data & 0x0000ffff) >> 1);
+			}
+			child->thread.fp[regno - 21] = data;
+		} else
+			goto out_eio;
+		break;
+
+	case PTRACE_GETREGS:	/* Get all gp regs from the child. */
+		for (i = 0; i < 19; i++) {
+			tmp = get_reg(child, i);
+			ret = put_user(tmp, datap);
+			if (ret)
+				break;
+			datap++;
+		}
+		break;
+
+	case PTRACE_SETREGS:	/* Set all gp regs in the child. */
+		for (i = 0; i < 19; i++) {
+			ret = get_user(tmp, datap);
+			if (ret)
+				break;
+			if (i == PT_SR) {
+				tmp &= SR_MASK;
+				tmp |= get_reg(child, PT_SR) & ~SR_MASK;
+			}
+			put_reg(child, i, tmp);
+			datap++;
+		}
+		break;
+
+	case PTRACE_GETFPREGS:	/* Get the child FPU state. */
+		if (copy_to_user(datap, &child->thread.fp,
+				 sizeof(struct user_m68kfp_struct)))
+			ret = -EFAULT;
+		break;
+
+	case PTRACE_SETFPREGS:	/* Set the child FPU state. */
+		if (copy_from_user(&child->thread.fp, datap,
+				   sizeof(struct user_m68kfp_struct)))
+			ret = -EFAULT;
+		break;
+
+	case PTRACE_GET_THREAD_AREA:
+		ret = put_user(task_thread_info(child)->tp_value, datap);
+		break;
+
+	default:
+		ret = ptrace_request(child, request, addr, data);
+		break;
+	}
+
+	return ret;
+out_eio:
+	return -EIO;
+}
+
+asmlinkage void syscall_trace(void)
+{
+	ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
+				 ? 0x80 : 0));
+	/*
+	 * this isn't the same as continuing with a signal, but it will do
+	 * for normal use.  strace only continues with a signal if the
+	 * stopping signal is not SIGTRAP.  -brl
+	 */
+	if (current->exit_code) {
+		send_sig(current->exit_code, current, 1);
+		current->exit_code = 0;
+	}
+}

arch/m68k/kernel/setup.c

···
-/*
- *  linux/arch/m68k/kernel/setup.c
- *
- *  Copyright (C) 1995  Hamish Macdonald
- */
-
-/*
- * This file handles the architecture-dependent parts of system setup
- */
-
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/sched.h>
-#include <linux/delay.h>
-#include <linux/interrupt.h>
-#include <linux/fs.h>
-#include <linux/console.h>
-#include <linux/genhd.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/init.h>
-#include <linux/bootmem.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/module.h>
-#include <linux/initrd.h>
-
-#include <asm/bootinfo.h>
-#include <asm/sections.h>
-#include <asm/setup.h>
-#include <asm/fpu.h>
-#include <asm/irq.h>
-#include <asm/io.h>
-#include <asm/machdep.h>
-#ifdef CONFIG_AMIGA
-#include <asm/amigahw.h>
-#endif
-#ifdef CONFIG_ATARI
-#include <asm/atarihw.h>
-#include <asm/atari_stram.h>
-#endif
-#ifdef CONFIG_SUN3X
-#include <asm/dvma.h>
-#endif
-#include <asm/natfeat.h>
-
-#if !FPSTATESIZE || !NR_IRQS
-#warning No CPU/platform type selected, your kernel will not work!
-#warning Are you building an allnoconfig kernel?
-#endif
-
-unsigned long m68k_machtype;
-EXPORT_SYMBOL(m68k_machtype);
-unsigned long m68k_cputype;
-EXPORT_SYMBOL(m68k_cputype);
-unsigned long m68k_fputype;
-unsigned long m68k_mmutype;
-EXPORT_SYMBOL(m68k_mmutype);
-#ifdef CONFIG_VME
-unsigned long vme_brdtype;
-EXPORT_SYMBOL(vme_brdtype);
-#endif
-
-int m68k_is040or060;
-EXPORT_SYMBOL(m68k_is040or060);
-
-extern unsigned long availmem;
-
-int m68k_num_memory;
-EXPORT_SYMBOL(m68k_num_memory);
-int m68k_realnum_memory;
-EXPORT_SYMBOL(m68k_realnum_memory);
-unsigned long m68k_memoffset;
-struct mem_info m68k_memory[NUM_MEMINFO];
-EXPORT_SYMBOL(m68k_memory);
-
-struct mem_info m68k_ramdisk;
-
-static char m68k_command_line[CL_SIZE];
-
-void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
-/* machine dependent irq functions */
-void (*mach_init_IRQ) (void) __initdata = NULL;
-void (*mach_get_model) (char *model);
-void (*mach_get_hardware_list) (struct seq_file *m);
-/* machine dependent timer functions */
-unsigned long (*mach_gettimeoffset) (void);
-int (*mach_hwclk) (int, struct rtc_time*);
-EXPORT_SYMBOL(mach_hwclk);
-int (*mach_set_clock_mmss) (unsigned long);
-unsigned int (*mach_get_ss)(void);
-int (*mach_get_rtc_pll)(struct rtc_pll_info *);
-int (*mach_set_rtc_pll)(struct rtc_pll_info *);
-EXPORT_SYMBOL(mach_get_ss);
-EXPORT_SYMBOL(mach_get_rtc_pll);
-EXPORT_SYMBOL(mach_set_rtc_pll);
-void (*mach_reset)( void );
-void (*mach_halt)( void );
-void (*mach_power_off)( void );
-long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
-#ifdef CONFIG_HEARTBEAT
-void (*mach_heartbeat) (int);
-EXPORT_SYMBOL(mach_heartbeat);
-#endif
-#ifdef CONFIG_M68K_L2_CACHE
-void (*mach_l2_flush) (int);
-#endif
-#if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
-void (*mach_beep)(unsigned int, unsigned int);
-EXPORT_SYMBOL(mach_beep);
-#endif
-#if defined(CONFIG_ISA) && defined(MULTI_ISA)
-int isa_type;
-int isa_sex;
-EXPORT_SYMBOL(isa_type);
-EXPORT_SYMBOL(isa_sex);
-#endif
-
-extern int amiga_parse_bootinfo(const struct bi_record *);
-extern int atari_parse_bootinfo(const struct bi_record *);
-extern int mac_parse_bootinfo(const struct bi_record *);
-extern int q40_parse_bootinfo(const struct bi_record *);
-extern int bvme6000_parse_bootinfo(const struct bi_record *);
-extern int mvme16x_parse_bootinfo(const struct bi_record *);
-extern int mvme147_parse_bootinfo(const struct bi_record *);
-extern int hp300_parse_bootinfo(const struct bi_record *);
-extern int apollo_parse_bootinfo(const struct bi_record *);
-
-extern void config_amiga(void);
-extern void config_atari(void);
-extern void config_mac(void);
-extern void config_sun3(void);
-extern void config_apollo(void);
-extern void config_mvme147(void);
-extern void config_mvme16x(void);
-extern void config_bvme6000(void);
-extern void config_hp300(void);
-extern void config_q40(void);
-extern void config_sun3x(void);
-
-#define MASK_256K 0xfffc0000
-
-extern void paging_init(void);
-
-static void __init m68k_parse_bootinfo(const struct bi_record *record)
-{
-	while (record->tag != BI_LAST) {
-		int unknown = 0;
-		const unsigned long *data = record->data;
-
-		switch (record->tag) {
-		case BI_MACHTYPE:
-		case BI_CPUTYPE:
-		case BI_FPUTYPE:
-		case BI_MMUTYPE:
-			/* Already set up by head.S */
-			break;
-
-		case BI_MEMCHUNK:
-			if (m68k_num_memory < NUM_MEMINFO) {
-				m68k_memory[m68k_num_memory].addr = data[0];
-				m68k_memory[m68k_num_memory].size = data[1];
-				m68k_num_memory++;
-			} else
-				printk("m68k_parse_bootinfo: too many memory chunks\n");
-			break;
-
-		case BI_RAMDISK:
-			m68k_ramdisk.addr = data[0];
-			m68k_ramdisk.size = data[1];
-			break;
-
-		case BI_COMMAND_LINE:
-			strlcpy(m68k_command_line, (const char *)data,
-				sizeof(m68k_command_line));
-			break;
-
-		default:
-			if (MACH_IS_AMIGA)
-				unknown = amiga_parse_bootinfo(record);
-			else if (MACH_IS_ATARI)
-				unknown = atari_parse_bootinfo(record);
-			else if (MACH_IS_MAC)
-				unknown = mac_parse_bootinfo(record);
-			else if (MACH_IS_Q40)
-				unknown = q40_parse_bootinfo(record);
-			else if (MACH_IS_BVME6000)
-				unknown = bvme6000_parse_bootinfo(record);
-			else if (MACH_IS_MVME16x)
-				unknown = mvme16x_parse_bootinfo(record);
-			else if (MACH_IS_MVME147)
-				unknown = mvme147_parse_bootinfo(record);
-			else if (MACH_IS_HP300)
-				unknown = hp300_parse_bootinfo(record);
-			else if (MACH_IS_APOLLO)
-				unknown = apollo_parse_bootinfo(record);
-			else
-				unknown = 1;
-		}
-		if (unknown)
-			printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
-			       record->tag);
-		record = (struct bi_record *)((unsigned long)record +
-					      record->size);
-	}
-
-	m68k_realnum_memory = m68k_num_memory;
-#ifdef CONFIG_SINGLE_MEMORY_CHUNK
-	if (m68k_num_memory > 1) {
-		printk("Ignoring last %i chunks of physical memory\n",
-		       (m68k_num_memory - 1));
-		m68k_num_memory = 1;
-	}
-#endif
-}
-
-void __init setup_arch(char **cmdline_p)
-{
-	int i;
-
-	/* The bootinfo is located right after the kernel bss */
-	m68k_parse_bootinfo((const struct bi_record *)_end);
-
-	if (CPU_IS_040)
-		m68k_is040or060 = 4;
-	else if (CPU_IS_060)
-		m68k_is040or060 = 6;
-
-	/* FIXME: m68k_fputype is passed in by Penguin booter, which can
-	 * be confused by software FPU emulation. BEWARE.
-	 * We should really do our own FPU check at startup.
-	 * [what do we do with buggy 68LC040s? if we have problems
-	 *  with them, we should add a test to check_bugs() below] */
-#ifndef CONFIG_M68KFPU_EMU_ONLY
-	/* clear the fpu if we have one */
-	if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
-		volatile int zero = 0;
-		asm volatile ("frestore %0" : : "m" (zero));
-	}
-#endif
-
-	if (CPU_IS_060) {
-		u32 pcr;
-
-		asm (".chip 68060; movec %%pcr,%0; .chip 68k"
-		     : "=d" (pcr));
-		if (((pcr >> 8) & 0xff) <= 5) {
-			printk("Enabling workaround for errata I14\n");
-			asm (".chip 68060; movec %0,%%pcr; .chip 68k"
-			     : : "d" (pcr | 0x20));
-		}
-	}
-
-	init_mm.start_code = PAGE_OFFSET;
-	init_mm.end_code = (unsigned long)_etext;
-	init_mm.end_data = (unsigned long)_edata;
-	init_mm.brk = (unsigned long)_end;
-
-	*cmdline_p = m68k_command_line;
-	memcpy(boot_command_line, *cmdline_p, CL_SIZE);
-
-	parse_early_param();
-
-#ifdef CONFIG_DUMMY_CONSOLE
-	conswitchp = &dummy_con;
-#endif
-
-	switch (m68k_machtype) {
-#ifdef CONFIG_AMIGA
-	case MACH_AMIGA:
-		config_amiga();
-		break;
-#endif
-#ifdef CONFIG_ATARI
-	case MACH_ATARI:
-		config_atari();
-		break;
-#endif
-#ifdef CONFIG_MAC
-	case MACH_MAC:
-		config_mac();
-		break;
-#endif
-#ifdef CONFIG_SUN3
-	case MACH_SUN3:
-		config_sun3();
-		break;
-#endif
-#ifdef CONFIG_APOLLO
-	case MACH_APOLLO:
-		config_apollo();
-		break;
-#endif
-#ifdef CONFIG_MVME147
-	case MACH_MVME147:
-		config_mvme147();
-		break;
-#endif
-#ifdef CONFIG_MVME16x
-	case MACH_MVME16x:
-		config_mvme16x();
-		break;
-#endif
-#ifdef CONFIG_BVME6000
-	case MACH_BVME6000:
-		config_bvme6000();
-		break;
-#endif
-#ifdef CONFIG_HP300
-	case MACH_HP300:
-		config_hp300();
-		break;
-#endif
-#ifdef CONFIG_Q40
-	case MACH_Q40:
-		config_q40();
-		break;
-#endif
-#ifdef CONFIG_SUN3X
-	case MACH_SUN3X:
-		config_sun3x();
-		break;
-#endif
-	default:
-		panic("No configuration setup");
-	}
-
-#ifdef CONFIG_NATFEAT
-	nf_init();
-#endif
-
-	paging_init();
-
-#ifndef CONFIG_SUN3
-	for (i = 1; i < m68k_num_memory; i++)
-		free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
-				  m68k_memory[i].size);
-#ifdef CONFIG_BLK_DEV_INITRD
-	if (m68k_ramdisk.size) {
-		reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
-				     m68k_ramdisk.addr, m68k_ramdisk.size,
-				     BOOTMEM_DEFAULT);
-		initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
-		initrd_end = initrd_start + m68k_ramdisk.size;
-		printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
-	}
-#endif
-
-#ifdef CONFIG_ATARI
-	if (MACH_IS_ATARI)
-		atari_stram_reserve_pages((void *)availmem);
-#endif
-#ifdef CONFIG_SUN3X
-	if (MACH_IS_SUN3X) {
-		dvma_init();
-	}
-#endif
-
-#endif /* !CONFIG_SUN3 */
-
-/* set ISA defs early as possible */
-#if defined(CONFIG_ISA) && defined(MULTI_ISA)
-	if (MACH_IS_Q40) {
-		isa_type = ISA_TYPE_Q40;
-		isa_sex = 0;
-	}
-#ifdef CONFIG_AMIGA_PCMCIA
-	if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
-		isa_type = ISA_TYPE_AG;
-		isa_sex = 1;
-	}
-#endif
-#endif
-}
-
-static int show_cpuinfo(struct seq_file *m, void *v)
-{
-	const char *cpu, *mmu, *fpu;
-	unsigned long clockfreq, clockfactor;
-
-#define LOOP_CYCLES_68020	(8)
-#define LOOP_CYCLES_68030	(8)
-#define LOOP_CYCLES_68040	(3)
-#define LOOP_CYCLES_68060	(1)
-
-	if (CPU_IS_020) {
-		cpu = "68020";
-		clockfactor = LOOP_CYCLES_68020;
-	} else if (CPU_IS_030) {
-		cpu = "68030";
-		clockfactor = LOOP_CYCLES_68030;
-	} else if (CPU_IS_040) {
-		cpu = "68040";
-		clockfactor = LOOP_CYCLES_68040;
-	} else if (CPU_IS_060) {
-		cpu = "68060";
-		clockfactor = LOOP_CYCLES_68060;
-	} else {
-		cpu = "680x0";
-		clockfactor = 0;
-	}
-
-#ifdef CONFIG_M68KFPU_EMU_ONLY
-	fpu = "none(soft float)";
+#ifdef CONFIG_MMU
+#include "setup_mm.c"
 #else
-	if (m68k_fputype & FPU_68881)
-		fpu = "68881";
-	else if (m68k_fputype & FPU_68882)
-		fpu = "68882";
-	else if (m68k_fputype & FPU_68040)
-		fpu = "68040";
-	else if (m68k_fputype & FPU_68060)
-		fpu = "68060";
-	else if (m68k_fputype & FPU_SUNFPA)
-		fpu = "Sun FPA";
-	else
-		fpu = "none";
+#include "setup_no.c"
 #endif
-
-	if (m68k_mmutype & MMU_68851)
-		mmu = "68851";
-	else if (m68k_mmutype & MMU_68030)
-		mmu = "68030";
-	else if (m68k_mmutype & MMU_68040)
-		mmu = "68040";
-	else if (m68k_mmutype & MMU_68060)
-		mmu = "68060";
-	else if (m68k_mmutype & MMU_SUN3)
-		mmu = "Sun-3";
-	else if (m68k_mmutype & MMU_APOLLO)
-		mmu = "Apollo";
-	else
-		mmu = "unknown";
-
-	clockfreq = loops_per_jiffy * HZ * clockfactor;
-
-	seq_printf(m, "CPU:\t\t%s\n"
-		   "MMU:\t\t%s\n"
-		   "FPU:\t\t%s\n"
-		   "Clocking:\t%lu.%1luMHz\n"
-		   "BogoMips:\t%lu.%02lu\n"
-		   "Calibration:\t%lu loops\n",
-		   cpu, mmu, fpu,
-		   clockfreq/1000000,(clockfreq/100000)%10,
-		   loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
-		   loops_per_jiffy);
-	return 0;
-}
-
-static void *c_start(struct seq_file *m, loff_t *pos)
-{
-	return *pos < 1 ? (void *)1 : NULL;
-}
-static void *c_next(struct seq_file *m, void *v, loff_t *pos)
-{
-	++*pos;
-	return NULL;
-}
-static void c_stop(struct seq_file *m, void *v)
-{
-}
-const struct seq_operations cpuinfo_op = {
-	.start	= c_start,
-	.next	= c_next,
-	.stop	= c_stop,
-	.show	= show_cpuinfo,
-};
-
-#ifdef CONFIG_PROC_HARDWARE
-static int hardware_proc_show(struct seq_file *m, void *v)
-{
-	char model[80];
-	unsigned long mem;
-	int i;
-
-	if (mach_get_model)
-		mach_get_model(model);
-	else
-		strcpy(model, "Unknown m68k");
-
-	seq_printf(m, "Model:\t\t%s\n", model);
-	for (mem = 0, i = 0; i < m68k_num_memory; i++)
-		mem += m68k_memory[i].size;
-	seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
-
-	if (mach_get_hardware_list)
-		mach_get_hardware_list(m);
-
-	return 0;
-}
-
-static int hardware_proc_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, hardware_proc_show, NULL);
-}
-
-static const struct file_operations hardware_proc_fops = {
-	.open		= hardware_proc_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
-static int __init proc_hardware_init(void)
-{
-	proc_create("hardware", 0, NULL, &hardware_proc_fops);
-	return 0;
-}
-module_init(proc_hardware_init);
-#endif
-
-void check_bugs(void)
-{
-#ifndef CONFIG_M68KFPU_EMU
-	if (m68k_fputype == 0) {
-		printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
-			"WHICH IS REQUIRED BY LINUX/M68K ***\n");
-		printk(KERN_EMERG "Upgrade your hardware or join the FPU "
-			"emulation project\n");
-		panic("no FPU");
-	}
-#endif /* !CONFIG_M68KFPU_EMU */
-}
-
-#ifdef CONFIG_ADB
-static int __init adb_probe_sync_enable (char *str) {
-	extern int __adb_probe_sync;
-	__adb_probe_sync = 1;
-	return 1;
-}
-
-__setup("adb_sync", adb_probe_sync_enable);
-#endif /* CONFIG_ADB */

arch/m68k/kernel/setup_mm.c

···
+/*
+ *  linux/arch/m68k/kernel/setup.c
+ *
+ *  Copyright (C) 1995  Hamish Macdonald
+ */
+
+/*
+ * This file handles the architecture-dependent parts of system setup
+ */
+
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/fs.h>
+#include <linux/console.h>
+#include <linux/genhd.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/module.h>
+#include <linux/initrd.h>
+
+#include <asm/bootinfo.h>
+#include <asm/sections.h>
+#include <asm/setup.h>
+#include <asm/fpu.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/machdep.h>
+#ifdef CONFIG_AMIGA
+#include <asm/amigahw.h>
+#endif
+#ifdef CONFIG_ATARI
+#include <asm/atarihw.h>
+#include <asm/atari_stram.h>
+#endif
+#ifdef CONFIG_SUN3X
+#include <asm/dvma.h>
+#endif
+#include <asm/natfeat.h>
+
+#if !FPSTATESIZE || !NR_IRQS
+#warning No CPU/platform type selected, your kernel will not work!
+#warning Are you building an allnoconfig kernel?
+#endif
+
+unsigned long m68k_machtype;
+EXPORT_SYMBOL(m68k_machtype);
+unsigned long m68k_cputype;
+EXPORT_SYMBOL(m68k_cputype);
+unsigned long m68k_fputype;
+unsigned long m68k_mmutype;
+EXPORT_SYMBOL(m68k_mmutype);
+#ifdef CONFIG_VME
+unsigned long vme_brdtype;
+EXPORT_SYMBOL(vme_brdtype);
+#endif
+
+int m68k_is040or060;
+EXPORT_SYMBOL(m68k_is040or060);
+
+extern unsigned long availmem;
+
+int m68k_num_memory;
+EXPORT_SYMBOL(m68k_num_memory);
+int m68k_realnum_memory;
+EXPORT_SYMBOL(m68k_realnum_memory);
+unsigned long m68k_memoffset;
+struct mem_info m68k_memory[NUM_MEMINFO];
+EXPORT_SYMBOL(m68k_memory);
+
+struct mem_info m68k_ramdisk;
+
+static char m68k_command_line[CL_SIZE];
+
+void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
+/* machine dependent irq functions */
+void (*mach_init_IRQ) (void) __initdata = NULL;
+void (*mach_get_model) (char *model);
+void (*mach_get_hardware_list) (struct seq_file *m);
+/* machine dependent timer functions */
+unsigned long (*mach_gettimeoffset) (void);
+int (*mach_hwclk) (int, struct rtc_time*);
+EXPORT_SYMBOL(mach_hwclk);
+int (*mach_set_clock_mmss) (unsigned long);
+unsigned int (*mach_get_ss)(void);
+int (*mach_get_rtc_pll)(struct rtc_pll_info *);
+int (*mach_set_rtc_pll)(struct rtc_pll_info *);
+EXPORT_SYMBOL(mach_get_ss);
+EXPORT_SYMBOL(mach_get_rtc_pll);
+EXPORT_SYMBOL(mach_set_rtc_pll);
+void (*mach_reset)( void );
+void (*mach_halt)( void );
+void (*mach_power_off)( void );
+long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
+#ifdef CONFIG_HEARTBEAT
+void (*mach_heartbeat) (int);
+EXPORT_SYMBOL(mach_heartbeat);
+#endif
+#ifdef CONFIG_M68K_L2_CACHE
+void (*mach_l2_flush) (int);
+#endif
+#if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
+void (*mach_beep)(unsigned int, unsigned int);
+EXPORT_SYMBOL(mach_beep);
+#endif
+#if defined(CONFIG_ISA) && defined(MULTI_ISA)
+int isa_type;
+int isa_sex;
+EXPORT_SYMBOL(isa_type);
+EXPORT_SYMBOL(isa_sex);
+#endif
+
+extern int amiga_parse_bootinfo(const struct bi_record *);
+extern int atari_parse_bootinfo(const struct bi_record *);
+extern int mac_parse_bootinfo(const struct bi_record *);
+extern int q40_parse_bootinfo(const struct bi_record *);
+extern int bvme6000_parse_bootinfo(const struct bi_record *);
+extern int mvme16x_parse_bootinfo(const struct bi_record *);
+extern int mvme147_parse_bootinfo(const struct bi_record *);
+extern int hp300_parse_bootinfo(const struct bi_record *);
+extern int apollo_parse_bootinfo(const struct bi_record *);
+
+extern void config_amiga(void);
+extern void config_atari(void);
+extern void config_mac(void);
+extern void config_sun3(void);
+extern void config_apollo(void);
+extern void config_mvme147(void);
+extern void config_mvme16x(void);
+extern void config_bvme6000(void);
+extern void config_hp300(void);
+extern void config_q40(void);
+extern void config_sun3x(void);
+
+#define MASK_256K 0xfffc0000
+
+extern void paging_init(void);
+
+static void __init m68k_parse_bootinfo(const struct bi_record *record)
+{
+	while (record->tag != BI_LAST) {
+		int unknown = 0;
+		const unsigned long *data = record->data;
+
+		switch (record->tag) {
+		case BI_MACHTYPE:
+		case BI_CPUTYPE:
+		case BI_FPUTYPE:
+		case BI_MMUTYPE:
+			/* Already set up by head.S */
+			break;
+
+		case BI_MEMCHUNK:
+			if (m68k_num_memory < NUM_MEMINFO) {
+				m68k_memory[m68k_num_memory].addr = data[0];
+				m68k_memory[m68k_num_memory].size = data[1];
+				m68k_num_memory++;
+			} else
+				printk("m68k_parse_bootinfo: too many memory chunks\n");
+			break;
+
+		case BI_RAMDISK:
+			m68k_ramdisk.addr = data[0];
+			m68k_ramdisk.size = data[1];
+			break;
+
+		case BI_COMMAND_LINE:
+			strlcpy(m68k_command_line, (const char *)data,
+				sizeof(m68k_command_line));
+			break;
+
+		default:
+			if (MACH_IS_AMIGA)
+				unknown = amiga_parse_bootinfo(record);
+			else if (MACH_IS_ATARI)
+				unknown = atari_parse_bootinfo(record);
+			else if (MACH_IS_MAC)
+				unknown = mac_parse_bootinfo(record);
+			else if (MACH_IS_Q40)
+				unknown = q40_parse_bootinfo(record);
+			else if (MACH_IS_BVME6000)
+				unknown = bvme6000_parse_bootinfo(record);
+			else if (MACH_IS_MVME16x)
+				unknown = mvme16x_parse_bootinfo(record);
+			else if (MACH_IS_MVME147)
+				unknown = mvme147_parse_bootinfo(record);
+			else if (MACH_IS_HP300)
+				unknown = hp300_parse_bootinfo(record);
+			else if (MACH_IS_APOLLO)
+				unknown = apollo_parse_bootinfo(record);
+			else
+				unknown = 1;
+		}
+		if (unknown)
+			printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
+			       record->tag);
+		record = (struct bi_record *)((unsigned long)record +
+					      record->size);
+	}
+
+	m68k_realnum_memory = m68k_num_memory;
+#ifdef CONFIG_SINGLE_MEMORY_CHUNK
+	if (m68k_num_memory > 1) {
+		printk("Ignoring last %i chunks of physical memory\n",
+		       (m68k_num_memory - 1));
+		m68k_num_memory = 1;
+	}
+#endif
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+	int i;
+
+	/* The bootinfo is located right after the kernel bss */
+	m68k_parse_bootinfo((const struct bi_record *)_end);
+
+	if (CPU_IS_040)
+		m68k_is040or060 = 4;
+	else if (CPU_IS_060)
+		m68k_is040or060 = 6;
+
+	/* FIXME: m68k_fputype is passed in by Penguin booter, which can
+	 * be confused by software FPU emulation. BEWARE.
+	 * We should really do our own FPU check at startup.
+	 * [what do we do with buggy 68LC040s? if we have problems
+	 *  with them, we should add a test to check_bugs() below] */
+#ifndef CONFIG_M68KFPU_EMU_ONLY
+	/* clear the fpu if we have one */
+	if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
+		volatile int zero = 0;
+		asm volatile ("frestore %0" : : "m" (zero));
+	}
+#endif
+
+	if (CPU_IS_060) {
+		u32 pcr;
+
+		asm (".chip 68060; movec %%pcr,%0; .chip 68k"
+		     : "=d" (pcr));
+		if (((pcr >> 8) & 0xff) <= 5) {
+			printk("Enabling workaround for errata I14\n");
+			asm (".chip 68060; movec %0,%%pcr; .chip 68k"
+			     : : "d" (pcr | 0x20));
+		}
+	}
+
+	init_mm.start_code = PAGE_OFFSET;
+	init_mm.end_code = (unsigned long)_etext;
+	init_mm.end_data = (unsigned long)_edata;
+	init_mm.brk = (unsigned long)_end;
+
+	*cmdline_p = m68k_command_line;
+	memcpy(boot_command_line, *cmdline_p, CL_SIZE);
+
+	parse_early_param();
+
+#ifdef CONFIG_DUMMY_CONSOLE
+	conswitchp = &dummy_con;
+#endif
+
+	switch (m68k_machtype) {
+#ifdef CONFIG_AMIGA
+	case MACH_AMIGA:
+		config_amiga();
+		break;
+#endif
+#ifdef CONFIG_ATARI
+	case MACH_ATARI:
+		config_atari();
+		break;
+#endif
+#ifdef CONFIG_MAC
+	case MACH_MAC:
+		config_mac();
+		break;
+#endif
+#ifdef CONFIG_SUN3
+	case MACH_SUN3:
+		config_sun3();
+		break;
+#endif
+#ifdef CONFIG_APOLLO
+	case MACH_APOLLO:
+		config_apollo();
+		break;
+#endif
+#ifdef CONFIG_MVME147
+	case MACH_MVME147:
+		config_mvme147();
+		break;
+#endif
+#ifdef CONFIG_MVME16x
+	case MACH_MVME16x:
+		config_mvme16x();
+		break;
+#endif
+#ifdef CONFIG_BVME6000
+	case MACH_BVME6000:
+		config_bvme6000();
+		break;
+#endif
+#ifdef CONFIG_HP300
+	case MACH_HP300:
+		config_hp300();
+		break;
+#endif
+#ifdef CONFIG_Q40
+	case MACH_Q40:
+		config_q40();
+		break;
+#endif
+#ifdef CONFIG_SUN3X
+	case MACH_SUN3X:
+		config_sun3x();
+		break;
+#endif
+	default:
+		panic("No configuration setup");
+	}
+
+#ifdef CONFIG_NATFEAT
+	nf_init();
+#endif
+
+	paging_init();
+
+#ifndef CONFIG_SUN3
+	for (i = 1; i < m68k_num_memory; i++)
+		free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
+				  m68k_memory[i].size);
+#ifdef CONFIG_BLK_DEV_INITRD
+	if (m68k_ramdisk.size) {
+		reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
+				     m68k_ramdisk.addr, m68k_ramdisk.size,
+				     BOOTMEM_DEFAULT);
+		initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
+		initrd_end = initrd_start + m68k_ramdisk.size;
+		printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
+	}
+#endif
+
+#ifdef CONFIG_ATARI
+	if (MACH_IS_ATARI)
+		atari_stram_reserve_pages((void *)availmem);
+#endif
+#ifdef CONFIG_SUN3X
+	if (MACH_IS_SUN3X) {
+		dvma_init();
+	}
+#endif
+
+#endif /* !CONFIG_SUN3 */
+
+/* set ISA defs early as possible */
+#if defined(CONFIG_ISA) && defined(MULTI_ISA)
+	if (MACH_IS_Q40) {
+		isa_type = ISA_TYPE_Q40;
+		isa_sex = 0;
+	}
+#ifdef CONFIG_AMIGA_PCMCIA
+	if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
+		isa_type = ISA_TYPE_AG;
+		isa_sex = 1;
+	}
+#endif
+#endif
+}
+
+static int show_cpuinfo(struct seq_file *m, void *v)
+{
+	const char *cpu, *mmu, *fpu;
+	unsigned long clockfreq, clockfactor;
+
+#define LOOP_CYCLES_68020	(8)
+#define LOOP_CYCLES_68030	(8)
+#define LOOP_CYCLES_68040	(3)
+#define LOOP_CYCLES_68060	(1)
+
+	if (CPU_IS_020) {
+		cpu = "68020";
+		clockfactor = LOOP_CYCLES_68020;
+	} else if (CPU_IS_030) {
+		cpu = "68030";
+		clockfactor = LOOP_CYCLES_68030;
+	} else if (CPU_IS_040) {
+		cpu = "68040";
+		clockfactor = LOOP_CYCLES_68040;
+	} else if (CPU_IS_060) {
+		cpu = "68060";
+		clockfactor = LOOP_CYCLES_68060;
+	} else {
+		cpu = "680x0";
+		clockfactor = 0;
+	}
+
+#ifdef CONFIG_M68KFPU_EMU_ONLY
+	fpu = "none(soft float)";
+#else
+	if (m68k_fputype & FPU_68881)
+		fpu = "68881";
+	else if (m68k_fputype & FPU_68882)
+		fpu = "68882";
+	else if (m68k_fputype & FPU_68040)
+		fpu = "68040";
+	else if (m68k_fputype & FPU_68060)
+		fpu = "68060";
+	else if (m68k_fputype & FPU_SUNFPA)
+		fpu = "Sun FPA";
+	else
+		fpu = "none";
+#endif
+
+	if (m68k_mmutype & MMU_68851)
+		mmu = "68851";
+	else if (m68k_mmutype & MMU_68030)
+		mmu = "68030";
+	else if (m68k_mmutype & MMU_68040)
+		mmu = "68040";
+	else if (m68k_mmutype & MMU_68060)
+		mmu = "68060";
+	else if (m68k_mmutype & MMU_SUN3)
+		mmu = "Sun-3";
+	else if (m68k_mmutype & MMU_APOLLO)
+		mmu = "Apollo";
+	else
+		mmu = "unknown";
+
+	clockfreq = loops_per_jiffy * HZ * clockfactor;
+
+	seq_printf(m, "CPU:\t\t%s\n"
+		   "MMU:\t\t%s\n"
+		   "FPU:\t\t%s\n"
+		   "Clocking:\t%lu.%1luMHz\n"
+		   "BogoMips:\t%lu.%02lu\n"
+		   "Calibration:\t%lu loops\n",
+		   cpu, mmu, fpu,
+		   clockfreq/1000000,(clockfreq/100000)%10,
+		   loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
+		   loops_per_jiffy);
+	return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+	return *pos < 1 ? (void *)1 : NULL;
+}
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+	++*pos;
+	return NULL;
+}
+static void c_stop(struct seq_file *m, void *v)
+{
+}
+const struct seq_operations cpuinfo_op = {
+	.start	= c_start,
+	.next	= c_next,
+	.stop	= c_stop,
+	.show	= show_cpuinfo,
+};
+
+#ifdef CONFIG_PROC_HARDWARE
+static int hardware_proc_show(struct seq_file *m, void *v)
+{
+	char model[80];
+	unsigned long mem;
+	int i;
+
+	if (mach_get_model)
+		mach_get_model(model);
+	else
+		strcpy(model, "Unknown m68k");
+
+	seq_printf(m, "Model:\t\t%s\n", model);
+	for (mem = 0, i = 0; i < m68k_num_memory; i++)
+		mem += m68k_memory[i].size;
+	seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
+
+	if (mach_get_hardware_list)
+		mach_get_hardware_list(m);
+
+	return 0;
+}
+
+static int hardware_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, hardware_proc_show, NULL);
+}
+
+static const struct file_operations hardware_proc_fops = {
+	.open		= hardware_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static int __init proc_hardware_init(void)
+{
+	proc_create("hardware", 0, NULL, &hardware_proc_fops);
+	return 0;
+}
+module_init(proc_hardware_init);
+#endif
+
+void check_bugs(void)
+{
+#ifndef CONFIG_M68KFPU_EMU
+	if (m68k_fputype == 0) {
+		printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
+			"WHICH IS REQUIRED BY LINUX/M68K ***\n");
+		printk(KERN_EMERG "Upgrade your hardware or join the FPU "
+			"emulation project\n");
+		panic("no FPU");
+	}
+#endif /* !CONFIG_M68KFPU_EMU */
+}
+
+#ifdef CONFIG_ADB
+static int __init adb_probe_sync_enable (char *str) {
+	extern int __adb_probe_sync;
+	__adb_probe_sync = 1;
+	return 1;
+}
+
+__setup("adb_sync", adb_probe_sync_enable);
+#endif /* CONFIG_ADB */

arch/m68k/kernel/signal.c

···
-/*
- *  linux/arch/m68k/kernel/signal.c
- *
- *  Copyright (C) 1991, 1992  Linus Torvalds
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file COPYING in the main directory of this archive
- * for more details.
- */
-
-/*
- * Linux/m68k support by Hamish Macdonald
- *
- * 68060 fixes by Jesper Skov
- *
- * 1997-12-01  Modified for POSIX.1b signals by Andreas Schwab
- *
- * mathemu support by Roman Zippel
- *  (Note: fpstate in the signal context is completely ignored for the emulator
- *         and the internal floating point format is put on stack)
- */
-
-/*
- * ++roman (07/09/96): implemented signal stacks (specially for tosemu on
- * Atari :-) Current limitation: Only one sigstack can be active at one time.
- * If a second signal with SA_ONSTACK set arrives while working on a sigstack,
- * SA_ONSTACK is ignored. This behaviour avoids lots of trouble with nested
- * signal handlers!
- */
-
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/kernel.h>
-#include <linux/signal.h>
-#include <linux/syscalls.h>
-#include <linux/errno.h>
-#include <linux/wait.h>
-#include <linux/ptrace.h>
-#include <linux/unistd.h>
-#include <linux/stddef.h>
-#include <linux/highuid.h>
-#include <linux/personality.h>
-#include <linux/tty.h>
-#include <linux/binfmts.h>
-#include <linux/module.h>
-
-#include <asm/setup.h>
-#include <asm/uaccess.h>
-#include <asm/pgtable.h>
-#include <asm/traps.h>
-#include <asm/ucontext.h>
-
-#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-
-static const int frame_extra_sizes[16] = {
-  [1]	= -1, /* sizeof(((struct frame *)0)->un.fmt1), */
-  [2]	= sizeof(((struct frame *)0)->un.fmt2),
-  [3]	= sizeof(((struct frame *)0)->un.fmt3),
-  [4]	= sizeof(((struct frame *)0)->un.fmt4),
-  [5]	= -1, /* sizeof(((struct frame *)0)->un.fmt5), */
-  [6]	= -1, /* sizeof(((struct frame *)0)->un.fmt6), */
-  [7]	= sizeof(((struct frame *)0)->un.fmt7),
-  [8]	= -1, /* sizeof(((struct frame *)0)->un.fmt8), */
-  [9]	= sizeof(((struct frame *)0)->un.fmt9),
-  [10]	= sizeof(((struct frame *)0)->un.fmta),
-  [11]	= sizeof(((struct frame *)0)->un.fmtb),
-  [12]	= -1, /* sizeof(((struct frame *)0)->un.fmtc), */
-  [13]	= -1, /* sizeof(((struct frame *)0)->un.fmtd), */
-  [14]	= -1, /* sizeof(((struct frame *)0)->un.fmte), */
-  [15]	= -1, /* sizeof(((struct frame *)0)->un.fmtf), */
-};
-
-int handle_kernel_fault(struct pt_regs *regs)
-{
-	const struct exception_table_entry *fixup;
-	struct pt_regs *tregs;
-
-	/* Are we prepared to handle this kernel fault? */
-	fixup = search_exception_tables(regs->pc);
-	if (!fixup)
-		return 0;
-
-	/* Create a new four word stack frame, discarding the old one. */
-	regs->stkadj = frame_extra_sizes[regs->format];
-	tregs =	(struct pt_regs *)((long)regs + regs->stkadj);
-	tregs->vector = regs->vector;
-	tregs->format = 0;
-	tregs->pc = fixup->fixup;
-	tregs->sr = regs->sr;
-
-	return 1;
-}
-
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-asmlinkage int
-sys_sigsuspend(int unused0, int unused1, old_sigset_t mask)
-{
-	mask &= _BLOCKABLE;
-	spin_lock_irq(&current->sighand->siglock);
-	current->saved_sigmask = current->blocked;
-	siginitset(&current->blocked, mask);
-	recalc_sigpending();
-	spin_unlock_irq(&current->sighand->siglock);
-
-	current->state = TASK_INTERRUPTIBLE;
-	schedule();
-	set_restore_sigmask();
-
-	return -ERESTARTNOHAND;
-}
-
-asmlinkage int
-sys_sigaction(int sig, const struct old_sigaction __user *act,
-	      struct old_sigaction __user *oact)
-{
-	struct k_sigaction new_ka, old_ka;
-	int ret;
-
-	if (act) {
-		old_sigset_t mask;
-		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
-		    __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
-		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-		    __get_user(mask, &act->sa_mask))
-			return -EFAULT;
-		siginitset(&new_ka.sa.sa_mask, mask);
-	}
-
-	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-	if (!ret && oact) {
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
-		    __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
-		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
-		    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
-			return -EFAULT;
-	}
-
-	return ret;
-}
-
-asmlinkage int
-sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
-{
-	return do_sigaltstack(uss, uoss, rdusp());
-}
-
-
-/*
- * Do a signal return; undo the signal stack.
- *
- * Keep the return code on the stack quadword aligned!
- * That makes the cache flush below easier.
- */
-
-struct sigframe
-{
-	char __user *pretcode;
-	int sig;
-	int code;
-	struct sigcontext __user *psc;
-	char retcode[8];
-	unsigned long extramask[_NSIG_WORDS-1];
-	struct sigcontext sc;
-};
-
-struct rt_sigframe
-{
-	char __user *pretcode;
-	int sig;
-	struct siginfo __user *pinfo;
-	void __user *puc;
-	char retcode[8];
-	struct siginfo info;
-	struct ucontext uc;
-};
-
-
-static unsigned char fpu_version;	/* version number of fpu, set by setup_frame */
-
-static inline int restore_fpu_state(struct sigcontext *sc)
-{
-	int err = 1;
-
-	if (FPU_IS_EMU) {
-	    /* restore registers */
-	    memcpy(current->thread.fpcntl, sc->sc_fpcntl, 12);
-	    memcpy(current->thread.fp, sc->sc_fpregs, 24);
-	    return 0;
-	}
-
-	if (CPU_IS_060 ? sc->sc_fpstate[2] : sc->sc_fpstate[0]) {
-	    /* Verify the frame format.  */
-	    if (!CPU_IS_060 && (sc->sc_fpstate[0] != fpu_version))
-		goto out;
-	    if (CPU_IS_020_OR_030) {
-		if (m68k_fputype & FPU_68881 &&
-		    !(sc->sc_fpstate[1] == 0x18 || sc->sc_fpstate[1] == 0xb4))
-		    goto out;
-		if (m68k_fputype & FPU_68882 &&
-		    !(sc->sc_fpstate[1] == 0x38 || sc->sc_fpstate[1] == 0xd4))
-		    goto out;
-	    } else if (CPU_IS_040) {
-		if (!(sc->sc_fpstate[1] == 0x00 ||
-                      sc->sc_fpstate[1] == 0x28 ||
-                      sc->sc_fpstate[1] == 0x60))
-		    goto out;
-	    } else if (CPU_IS_060) {
-		if (!(sc->sc_fpstate[3] == 0x00 ||
-                      sc->sc_fpstate[3] == 0x60 ||
-		      sc->sc_fpstate[3] == 0xe0))
-		    goto out;
-	    } else
-		goto out;
-
-	    __asm__ volatile (".chip 68k/68881\n\t"
-			      "fmovemx %0,%%fp0-%%fp1\n\t"
-			      "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t"
-			      ".chip 68k"
-			      : /* no outputs */
-			      : "m" (*sc->sc_fpregs), "m" (*sc->sc_fpcntl));
-	}
-	__asm__ volatile (".chip 68k/68881\n\t"
-			  "frestore %0\n\t"
-			  ".chip 68k" : : "m" (*sc->sc_fpstate));
-	err = 0;
-
-out:
-	return err;
-}
-
-#define FPCONTEXT_SIZE	216
-#define uc_fpstate	uc_filler[0]
-#define uc_formatvec	uc_filler[FPCONTEXT_SIZE/4]
-#define uc_extra	uc_filler[FPCONTEXT_SIZE/4+1]
-
-static inline int rt_restore_fpu_state(struct ucontext __user *uc)
-{
-	unsigned char fpstate[FPCONTEXT_SIZE];
-	int context_size = CPU_IS_060 ? 8 : 0;
-	fpregset_t fpregs;
-	int err = 1;
-
-	if (FPU_IS_EMU) {
-		/* restore fpu control register */
-		if (__copy_from_user(current->thread.fpcntl,
-				uc->uc_mcontext.fpregs.f_fpcntl, 12))
-			goto out;
-		/* restore all other fpu register */
-		if (__copy_from_user(current->thread.fp,
-				uc->uc_mcontext.fpregs.f_fpregs, 96))
-			goto out;
-		return 0;
-	}
-
-	if (__get_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate))
-		goto out;
-	if (CPU_IS_060 ? fpstate[2] : fpstate[0]) {
-		if (!CPU_IS_060)
-			context_size = fpstate[1];
-		/* Verify the frame format.  */
-		if (!CPU_IS_060 && (fpstate[0] != fpu_version))
-			goto out;
-		if (CPU_IS_020_OR_030) {
-			if (m68k_fputype & FPU_68881 &&
-			    !(context_size == 0x18 || context_size == 0xb4))
-				goto out;
-			if (m68k_fputype & FPU_68882 &&
-			    !(context_size == 0x38 || context_size == 0xd4))
-				goto out;
-		} else if (CPU_IS_040) {
-			if (!(context_size == 0x00 ||
-			      context_size == 0x28 ||
-			      context_size == 0x60))
-				goto out;
-		} else if (CPU_IS_060) {
-			if (!(fpstate[3] == 0x00 ||
-			      fpstate[3] == 0x60 ||
-			      fpstate[3] == 0xe0))
-				goto out;
-		} else
-			goto out;
-		if (__copy_from_user(&fpregs, &uc->uc_mcontext.fpregs,
-				     sizeof(fpregs)))
-			goto out;
-		__asm__ volatile (".chip 68k/68881\n\t"
-				  "fmovemx %0,%%fp0-%%fp7\n\t"
-				  "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t"
-				  ".chip 68k"
-				  : /* no outputs */
-				  : "m" (*fpregs.f_fpregs),
-				    "m" (*fpregs.f_fpcntl));
-	}
-	if (context_size &&
-	    __copy_from_user(fpstate + 4, (long __user *)&uc->uc_fpstate + 1,
-			     context_size))
-		goto out;
-	__asm__ volatile (".chip 68k/68881\n\t"
-			  "frestore %0\n\t"
-			  ".chip 68k" : : "m" (*fpstate));
-	err = 0;
-
-out:
-	return err;
-}
-
-static int mangle_kernel_stack(struct pt_regs *regs, int formatvec,
-			       void __user *fp)
-{
-	int fsize = frame_extra_sizes[formatvec >> 12];
-	if (fsize < 0) {
-		/*
-		 * user process trying to return with weird frame format
-		 */
-#ifdef DEBUG
-		printk("user process returning with weird frame format\n");
-#endif
-		return 1;
-	}
-	if (!fsize) {
-		regs->format = formatvec >> 12;
-		regs->vector = formatvec & 0xfff;
-	} else {
-		struct switch_stack *sw = (struct switch_stack *)regs - 1;
-		unsigned long buf[fsize / 2]; /* yes, twice as much */
-
-		/* that'll make sure that expansion won't crap over data */
-		if (copy_from_user(buf + fsize / 4, fp, fsize))
-			return 1;
-
-		/* point of no return */
-		regs->format = formatvec >> 12;
-		regs->vector = formatvec & 0xfff;
-#define frame_offset (sizeof(struct pt_regs)+sizeof(struct switch_stack))
-		__asm__ __volatile__
-			("   movel %0,%/a0\n\t"
-			 "   subl %1,%/a0\n\t"     /* make room on stack */
-			 "   movel %/a0,%/sp\n\t"  /* set stack pointer */
-			 /* move switch_stack and pt_regs */
-			 "1: movel %0@+,%/a0@+\n\t"
-			 "   dbra %2,1b\n\t"
-			 "   lea %/sp@(%c3),%/a0\n\t" /* add offset of fmt */
-			 "   lsrl  #2,%1\n\t"
-			 "   subql #1,%1\n\t"
-			 /* copy to the gap we'd made */
-			 "2: movel %4@+,%/a0@+\n\t"
-			 "   dbra %1,2b\n\t"
-			 "   bral ret_from_signal\n"
-			 : /* no outputs, it doesn't ever return */
-			 : "a" (sw), "d" (fsize), "d" (frame_offset/4-1),
-			   "n" (frame_offset), "a" (buf + fsize/4)
-			 : "a0");
-#undef frame_offset
-	}
-	return 0;
-}
-
-static inline int
-restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *usc, void __user *fp)
-{
-	int formatvec;
-	struct sigcontext context;
-	int err;
-
-	/* Always make any pending restarted system calls return -EINTR */
-	current_thread_info()->restart_block.fn = do_no_restart_syscall;
-
-	/* get previous context */
-	if (copy_from_user(&context, usc, sizeof(context)))
-		goto badframe;
-
-	/* restore passed registers */
-	regs->d0 = context.sc_d0;
-	regs->d1 = context.sc_d1;
-	regs->a0 = context.sc_a0;
-	regs->a1 = context.sc_a1;
-	regs->sr = (regs->sr & 0xff00) | (context.sc_sr & 0xff);
-	regs->pc = context.sc_pc;
-	regs->orig_d0 = -1;		/* disable syscall checks */
-	wrusp(context.sc_usp);
-	formatvec = context.sc_formatvec;
-
-	err = restore_fpu_state(&context);
-
-	if (err || mangle_kernel_stack(regs, formatvec, fp))
-		goto badframe;
-
-	return 0;
-
-badframe:
-	return 1;
-}
-
-static inline int
-rt_restore_ucontext(struct pt_regs *regs, struct switch_stack *sw,
-		    struct ucontext __user *uc)
-{
-	int temp;
-	greg_t __user *gregs = uc->uc_mcontext.gregs;
-	unsigned long usp;
-	int err;
-
-	/* Always make any pending restarted system calls return -EINTR */
-	current_thread_info()->restart_block.fn = do_no_restart_syscall;
-
-	err = __get_user(temp, &uc->uc_mcontext.version);
-	if (temp != MCONTEXT_VERSION)
-		goto badframe;
-	/* restore passed registers */
-	err |= __get_user(regs->d0, &gregs[0]);
-	err |= __get_user(regs->d1, &gregs[1]);
-	err |= __get_user(regs->d2, &gregs[2]);
-	err |= __get_user(regs->d3, &gregs[3]);
-	err |= __get_user(regs->d4, &gregs[4]);
-	err |= __get_user(regs->d5, &gregs[5]);
-	err |= __get_user(sw->d6, &gregs[6]);
-	err |= __get_user(sw->d7, &gregs[7]);
-	err |= __get_user(regs->a0, &gregs[8]);
-	err |= __get_user(regs->a1, &gregs[9]);
-	err |= __get_user(regs->a2, &gregs[10]);
-	err |= __get_user(sw->a3, &gregs[11]);
-	err |= __get_user(sw->a4, &gregs[12]);
-	err |= __get_user(sw->a5, &gregs[13]);
-	err |= __get_user(sw->a6, &gregs[14]);
-	err |= __get_user(usp, &gregs[15]);
-	wrusp(usp);
-	err |= __get_user(regs->pc, &gregs[16]);
-	err |= __get_user(temp, &gregs[17]);
-	regs->sr = (regs->sr & 0xff00) | (temp & 0xff);
-	regs->orig_d0 = -1;		/* disable syscall checks */
-	err |= __get_user(temp, &uc->uc_formatvec);
-
-	err |= rt_restore_fpu_state(uc);
-
-	if (err || do_sigaltstack(&uc->uc_stack, NULL, usp) == -EFAULT)
-		goto badframe;
-
-	if (mangle_kernel_stack(regs, temp, &uc->uc_extra))
-		goto badframe;
-
-	return 0;
-
-badframe:
-	return 1;
-}
-
-asmlinkage int do_sigreturn(unsigned long __unused)
-{
-	struct switch_stack *sw = (struct switch_stack *) &__unused;
-	struct pt_regs *regs = (struct pt_regs *) (sw + 1);
-	unsigned long usp = rdusp();
-	struct sigframe __user *frame = (struct sigframe __user *)(usp - 4);
-	sigset_t set;
-
-	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
-		goto badframe;
-	if (__get_user(set.sig[0], &frame->sc.sc_mask) ||
-	    (_NSIG_WORDS > 1 &&
-	     __copy_from_user(&set.sig[1], &frame->extramask,
-			      sizeof(frame->extramask))))
-		goto badframe;
-
-	sigdelsetmask(&set, ~_BLOCKABLE);
-	current->blocked = set;
-	recalc_sigpending();
-
-	if (restore_sigcontext(regs, &frame->sc, frame + 1))
-		goto badframe;
-	return regs->d0;
-
-badframe:
-	force_sig(SIGSEGV, current);
-	return 0;
-}
-
-asmlinkage int do_rt_sigreturn(unsigned long __unused)
-{
-	struct switch_stack *sw = (struct switch_stack *) &__unused;
-	struct pt_regs *regs = (struct pt_regs *) (sw + 1);
-	unsigned long usp = rdusp();
-	struct rt_sigframe __user *frame = (struct rt_sigframe __user *)(usp - 4);
-	sigset_t set;
-
-	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
-		goto badframe;
-	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
-		goto badframe;
-
-	sigdelsetmask(&set, ~_BLOCKABLE);
-	current->blocked = set;
-	recalc_sigpending();
-
-	if (rt_restore_ucontext(regs, sw, &frame->uc))
-		goto badframe;
-	return regs->d0;
-
-badframe:
-	force_sig(SIGSEGV, current);
-	return 0;
-}
-
-/*
- * Set up a signal frame.
- */
-
-static inline void save_fpu_state(struct sigcontext *sc, struct pt_regs *regs)
-{
-	if (FPU_IS_EMU) {
-		/* save registers */
-		memcpy(sc->sc_fpcntl, current->thread.fpcntl, 12);
-		memcpy(sc->sc_fpregs, current->thread.fp, 24);
-		return;
-	}
-
-	__asm__ volatile (".chip 68k/68881\n\t"
-			  "fsave %0\n\t"
-			  ".chip 68k"
-			  : : "m" (*sc->sc_fpstate) : "memory");
-
-	if (CPU_IS_060 ? sc->sc_fpstate[2] : sc->sc_fpstate[0]) {
-		fpu_version = sc->sc_fpstate[0];
-		if (CPU_IS_020_OR_030 &&
-		    regs->vector >= (VEC_FPBRUC * 4) &&
-		    regs->vector <= (VEC_FPNAN * 4)) {
-			/* Clear pending exception in 68882 idle frame */
-			if (*(unsigned short *) sc->sc_fpstate == 0x1f38)
-				sc->sc_fpstate[0x38] |= 1 << 3;
-		}
-		__asm__ volatile (".chip 68k/68881\n\t"
-				  "fmovemx %%fp0-%%fp1,%0\n\t"
-				  "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t"
-				  ".chip 68k"
-				  : "=m" (*sc->sc_fpregs),
-				    "=m" (*sc->sc_fpcntl)
-				  : /* no inputs */
-				  : "memory");
-	}
-}
-
-static inline int rt_save_fpu_state(struct ucontext __user *uc, struct pt_regs *regs)
-{
-	unsigned char fpstate[FPCONTEXT_SIZE];
-	int context_size = CPU_IS_060 ? 8 : 0;
-	int err = 0;
-
-	if (FPU_IS_EMU) {
-		/* save fpu control register */
-		err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpcntl,
-				current->thread.fpcntl, 12);
-		/* save all other fpu register */
-		err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpregs,
-				current->thread.fp, 96);
-		return err;
-	}
-
-	__asm__ volatile (".chip 68k/68881\n\t"
-			  "fsave %0\n\t"
-			  ".chip 68k"
-			  : : "m" (*fpstate) : "memory");
-
-	err |= __put_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate);
-	if (CPU_IS_060 ? fpstate[2] : fpstate[0]) {
-		fpregset_t fpregs;
-		if (!CPU_IS_060)
-			context_size = fpstate[1];
-		fpu_version = fpstate[0];
-		if (CPU_IS_020_OR_030 &&
-		    regs->vector >= (VEC_FPBRUC * 4) &&
-		    regs->vector <= (VEC_FPNAN * 4)) {
-			/* Clear pending exception in 68882 idle frame */
-			if (*(unsigned short *) fpstate == 0x1f38)
-				fpstate[0x38] |= 1 << 3;
-		}
-		__asm__ volatile (".chip 68k/68881\n\t"
-				  "fmovemx %%fp0-%%fp7,%0\n\t"
-				  "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t"
-				  ".chip 68k"
-				  : "=m" (*fpregs.f_fpregs),
-				    "=m" (*fpregs.f_fpcntl)
-				  : /* no inputs */
-				  : "memory");
-		err |= copy_to_user(&uc->uc_mcontext.fpregs, &fpregs,
-				    sizeof(fpregs));
-	}
-	if (context_size)
-		err |= copy_to_user((long __user *)&uc->uc_fpstate + 1, fpstate + 4,
-				    context_size);
-	return err;
-}
-
-static void setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs,
-			     unsigned long mask)
-{
-	sc->sc_mask = mask;
-	sc->sc_usp = rdusp();
-	sc->sc_d0 = regs->d0;
-	sc->sc_d1 = regs->d1;
-	sc->sc_a0 = regs->a0;
-	sc->sc_a1 = regs->a1;
-	sc->sc_sr = regs->sr;
-	sc->sc_pc = regs->pc;
-	sc->sc_formatvec = regs->format << 12 | regs->vector;
-	save_fpu_state(sc, regs);
-}
-
-static inline int rt_setup_ucontext(struct ucontext __user *uc, struct pt_regs *regs)
-{
-	struct switch_stack *sw = (struct switch_stack *)regs - 1;
-	greg_t __user *gregs = uc->uc_mcontext.gregs;
-	int err = 0;
-
-	err |= __put_user(MCONTEXT_VERSION, &uc->uc_mcontext.version);
-	err |= __put_user(regs->d0, &gregs[0]);
-	err |= __put_user(regs->d1, &gregs[1]);
-	err |= __put_user(regs->d2, &gregs[2]);
-	err |= __put_user(regs->d3, &gregs[3]);
-	err |= __put_user(regs->d4, &gregs[4]);
-	err |= __put_user(regs->d5, &gregs[5]);
-	err |= __put_user(sw->d6, &gregs[6]);
-	err |= __put_user(sw->d7, &gregs[7]);
-	err |= __put_user(regs->a0, &gregs[8]);
-	err |= __put_user(regs->a1, &gregs[9]);
-	err |= __put_user(regs->a2, &gregs[10]);
-	err |= __put_user(sw->a3, &gregs[11]);
-	err |= __put_user(sw->a4, &gregs[12]);
-	err |= __put_user(sw->a5, &gregs[13]);
-	err |= __put_user(sw->a6, &gregs[14]);
-	err |= __put_user(rdusp(), &gregs[15]);
-	err |= __put_user(regs->pc, &gregs[16]);
-	err |= __put_user(regs->sr, &gregs[17]);
-	err |= __put_user((regs->format << 12) | regs->vector, &uc->uc_formatvec);
-	err |= rt_save_fpu_state(uc, regs);
-	return err;
-}
-
-static inline void push_cache (unsigned long vaddr)
-{
-	/*
-	 * Using the old cache_push_v() was really a big waste.
-	 *
-	 * What we are trying to do is to flush 8 bytes to ram.
-	 * Flushing 2 cache lines of 16 bytes is much cheaper than
-	 * flushing 1 or 2 pages, as previously done in
-	 * cache_push_v().
-	 *                                                     Jes
-	 */
-	if (CPU_IS_040) {
-		unsigned long temp;
-
-		__asm__ __volatile__ (".chip 68040\n\t"
-				      "nop\n\t"
-				      "ptestr (%1)\n\t"
-				      "movec %%mmusr,%0\n\t"
-				      ".chip 68k"
-				      : "=r" (temp)
-				      : "a" (vaddr));
-
-		temp &= PAGE_MASK;
-		temp |= vaddr & ~PAGE_MASK;
-
-		__asm__ __volatile__ (".chip 68040\n\t"
-				      "nop\n\t"
-				      "cpushl %%bc,(%0)\n\t"
-				      ".chip 68k"
-				      : : "a" (temp));
-	}
-	else if (CPU_IS_060) {
-		unsigned long temp;
-		__asm__ __volatile__ (".chip 68060\n\t"
-				      "plpar (%0)\n\t"
-				      ".chip 68k"
-				      : "=a" (temp)
-				      : "0" (vaddr));
-		__asm__ __volatile__ (".chip 68060\n\t"
-				      "cpushl %%bc,(%0)\n\t"
-				      ".chip 68k"
-				      : : "a" (temp));
-	}
-	else {
-		/*
-		 * 68030/68020 have no writeback cache;
-		 * still need to clear icache.
-		 * Note that vaddr is guaranteed to be long word aligned.
-		 */
-		unsigned long temp;
-		asm volatile ("movec %%cacr,%0" : "=r" (temp));
-		temp += 4;
-		asm volatile ("movec %0,%%caar\n\t"
-			      "movec %1,%%cacr"
-			      : : "r" (vaddr), "r" (temp));
-		asm volatile ("movec %0,%%caar\n\t"
-			      "movec %1,%%cacr"
-			      : : "r" (vaddr + 4), "r" (temp));
-	}
-}
-
-static inline void __user *
-get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
-{
-	unsigned long usp;
-
-	/* Default to using normal stack.  */
-	usp = rdusp();
-
-	/* This is the X/Open sanctioned signal stack switching.  */
-	if (ka->sa.sa_flags & SA_ONSTACK) {
-		if (!sas_ss_flags(usp))
-			usp = current->sas_ss_sp + current->sas_ss_size;
-	}
-	return (void __user *)((usp - frame_size) & -8UL);
-}
-
-static int setup_frame (int sig, struct k_sigaction *ka,
-			 sigset_t *set, struct pt_regs *regs)
-{
-	struct sigframe __user *frame;
-	int fsize = frame_extra_sizes[regs->format];
-	struct sigcontext context;
-	int err = 0;
-
-	if (fsize < 0) {
-#ifdef DEBUG
-		printk ("setup_frame: Unknown frame format %#x\n",
-			regs->format);
-#endif
-		goto give_sigsegv;
-	}
-
-	frame = get_sigframe(ka, regs, sizeof(*frame) + fsize);
-
-	if (fsize)
-		err |= copy_to_user (frame + 1, regs + 1, fsize);
-
-	err |= __put_user((current_thread_info()->exec_domain
-			   && current_thread_info()->exec_domain->signal_invmap
-			   && sig < 32
-			   ? current_thread_info()->exec_domain->signal_invmap[sig]
-			   : sig),
-			  &frame->sig);
-
-	err |= __put_user(regs->vector, &frame->code);
-	err |= __put_user(&frame->sc, &frame->psc);
-
-	if (_NSIG_WORDS > 1)
-		err |= copy_to_user(frame->extramask, &set->sig[1],
-				    sizeof(frame->extramask));
-
-	setup_sigcontext(&context, regs, set->sig[0]);
-	err |= copy_to_user (&frame->sc, &context, sizeof(context));
-
-	/* Set up to return from userspace.  */
-	err |= __put_user(frame->retcode, &frame->pretcode);
-	/* moveq #,d0; trap #0 */
-	err |= __put_user(0x70004e40 + (__NR_sigreturn << 16),
-			  (long __user *)(frame->retcode));
-
-	if (err)
-		goto give_sigsegv;
-
-	push_cache ((unsigned long) &frame->retcode);
-
-	/*
-	 * Set up registers for signal handler.  All the state we are about
-	 * to destroy is successfully copied to sigframe.
-	 */
-	wrusp ((unsigned long) frame);
-	regs->pc = (unsigned long) ka->sa.sa_handler;
-
-	/*
-	 * This is subtle; if we build more than one sigframe, all but the
-	 * first one will see frame format 0 and have fsize == 0, so we won't
-	 * screw stkadj.
-	 */
-	if (fsize)
-		regs->stkadj = fsize;
-
-	/* Prepare to skip over the extra stuff in the exception frame.  */
-	if (regs->stkadj) {
-		struct pt_regs *tregs =
-			(struct pt_regs *)((ulong)regs + regs->stkadj);
-#ifdef DEBUG
-		printk("Performing stackadjust=%04x\n", regs->stkadj);
-#endif
-		/* This must be copied with decreasing addresses to
-                   handle overlaps.  */
-		tregs->vector = 0;
-		tregs->format = 0;
-		tregs->pc = regs->pc;
-		tregs->sr = regs->sr;
-	}
-	return 0;
-
-give_sigsegv:
-	force_sigsegv(sig, current);
-	return err;
-}
-
-static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
-			    sigset_t *set, struct pt_regs *regs)
-{
-	struct rt_sigframe __user *frame;
-	int fsize = frame_extra_sizes[regs->format];
-	int err = 0;
-
-	if (fsize < 0) {
-#ifdef DEBUG
-		printk ("setup_frame: Unknown frame format %#x\n",
-			regs->format);
-#endif
-		goto give_sigsegv;
-	}
-
-	frame = get_sigframe(ka, regs, sizeof(*frame));
-
-	if (fsize)
-		err |= copy_to_user (&frame->uc.uc_extra, regs + 1, fsize);
-
-	err |= __put_user((current_thread_info()->exec_domain
-			   && current_thread_info()->exec_domain->signal_invmap
-			   && sig < 32
-			   ? current_thread_info()->exec_domain->signal_invmap[sig]
-			   : sig),
-			  &frame->sig);
-	err |= __put_user(&frame->info, &frame->pinfo);
-	err |= __put_user(&frame->uc, &frame->puc);
-	err |= copy_siginfo_to_user(&frame->info, info);
-
-	/* Create the ucontext.  */
-	err |= __put_user(0, &frame->uc.uc_flags);
-	err |= __put_user(NULL, &frame->uc.uc_link);
-	err |= __put_user((void __user *)current->sas_ss_sp,
-			  &frame->uc.uc_stack.ss_sp);
-	err |= __put_user(sas_ss_flags(rdusp()),
-			  &frame->uc.uc_stack.ss_flags);
-	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
-	err |= rt_setup_ucontext(&frame->uc, regs);
-	err |= copy_to_user (&frame->uc.uc_sigmask, set, sizeof(*set));
-
-	/* Set up to return from userspace.  */
-	err |= __put_user(frame->retcode, &frame->pretcode);
-#ifdef __mcoldfire__
-	/* movel #__NR_rt_sigreturn,d0; trap #0 */
-	err |= __put_user(0x203c0000, (long __user *)(frame->retcode + 0));
-	err |= __put_user(0x00004e40 + (__NR_rt_sigreturn << 16),
-			  (long __user *)(frame->retcode + 4));
+#ifdef CONFIG_MMU
+#include "signal_mm.c"
 #else
-	/* moveq #,d0; notb d0; trap #0 */
-	err |= __put_user(0x70004600 + ((__NR_rt_sigreturn ^ 0xff) << 16),
-			  (long __user *)(frame->retcode + 0));
-	err |= __put_user(0x4e40, (short __user *)(frame->retcode + 4));
+#include "signal_no.c"
 #endif
-
-	if (err)
-		goto give_sigsegv;
-
-	push_cache ((unsigned long) &frame->retcode);
-
-	/*
-	 * Set up registers for signal handler.  All the state we are about
-	 * to destroy is successfully copied to sigframe.
-	 */
-	wrusp ((unsigned long) frame);
-	regs->pc = (unsigned long) ka->sa.sa_handler;
-
-	/*
-	 * This is subtle; if we build more than one sigframe, all but the
-	 * first one will see frame format 0 and have fsize == 0, so we won't
-	 * screw stkadj.
-	 */
-	if (fsize)
-		regs->stkadj = fsize;
-
-	/* Prepare to skip over the extra stuff in the exception frame.  */
-	if (regs->stkadj) {
-		struct pt_regs *tregs =
-			(struct pt_regs *)((ulong)regs + regs->stkadj);
-#ifdef DEBUG
-		printk("Performing stackadjust=%04x\n", regs->stkadj);
-#endif
-		/* This must be copied with decreasing addresses to
-                   handle overlaps.  */
-		tregs->vector = 0;
-		tregs->format = 0;
-		tregs->pc = regs->pc;
-		tregs->sr = regs->sr;
-	}
-	return 0;
-
-give_sigsegv:
-	force_sigsegv(sig, current);
-	return err;
-}
-
-static inline void
-handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
-{
-	switch (regs->d0) {
-	case -ERESTARTNOHAND:
-		if (!has_handler)
-			goto do_restart;
-		regs->d0 = -EINTR;
-		break;
-
-	case -ERESTART_RESTARTBLOCK:
-		if (!has_handler) {
-			regs->d0 = __NR_restart_syscall;
-			regs->pc -= 2;
-			break;
-		}
-		regs->d0 = -EINTR;
-		break;
-
-	case -ERESTARTSYS:
-		if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) {
-			regs->d0 = -EINTR;
-			break;
-		}
-	/* fallthrough */
-	case -ERESTARTNOINTR:
-	do_restart:
-		regs->d0 = regs->orig_d0;
-		regs->pc -= 2;
-		break;
-	}
-}
-
-void ptrace_signal_deliver(struct pt_regs *regs, void *cookie)
-{
-	if (regs->orig_d0 < 0)
-		return;
-	switch (regs->d0) {
-	case -ERESTARTNOHAND:
-	case -ERESTARTSYS:
-	case -ERESTARTNOINTR:
-		regs->d0 = regs->orig_d0;
-		regs->orig_d0 = -1;
-		regs->pc -= 2;
-		break;
-	}
-}
-
-/*
- * OK, we're invoking a handler
- */
-static void
-handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info,
-	      sigset_t *oldset, struct pt_regs *regs)
-{
-	int err;
-	/* are we from a system call? */
-	if (regs->orig_d0 >= 0)
-		/* If so, check system call restarting.. */
-		handle_restart(regs, ka, 1);
-
-	/* set up the stack frame */
-	if (ka->sa.sa_flags & SA_SIGINFO)
-		err = setup_rt_frame(sig, ka, info, oldset, regs);
-	else
-		err = setup_frame(sig, ka, oldset, regs);
-
-	if (err)
-		return;
-
-	sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
-	if (!(ka->sa.sa_flags & SA_NODEFER))
-		sigaddset(&current->blocked,sig);
-	recalc_sigpending();
-
-	if (test_thread_flag(TIF_DELAYED_TRACE)) {
-		regs->sr &= ~0x8000;
-		send_sig(SIGTRAP, current, 1);
-	}
-
-	clear_thread_flag(TIF_RESTORE_SIGMASK);
-}
-
-/*
- * Note that 'init' is a special process: it doesn't get signals it doesn't
- * want to handle. Thus you cannot kill init even with a SIGKILL even by
- * mistake.
- */
-asmlinkage void do_signal(struct pt_regs *regs)
-{
-	siginfo_t info;
-	struct k_sigaction ka;
-	int signr;
-	sigset_t *oldset;
-
-	current->thread.esp0 = (unsigned long) regs;
-
-	if (test_thread_flag(TIF_RESTORE_SIGMASK))
-		oldset = &current->saved_sigmask;
-	else
-		oldset = &current->blocked;
-
-	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
-	if (signr > 0) {
-		/* Whee!  Actually deliver the signal.  */
-		handle_signal(signr, &ka, &info, oldset, regs);
-		return;
-	}
-
-	/* Did we come from a system call? */
-	if (regs->orig_d0 >= 0)
-		/* Restart the system call - no handlers present */
-		handle_restart(regs, NULL, 0);
-
-	/* If there's no signal to deliver, we just restore the saved mask.  */
-	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
-		clear_thread_flag(TIF_RESTORE_SIGMASK);
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
-}

arch/m68k/kernel/signal_mm.c

···
+/*
+ *  linux/arch/m68k/kernel/signal.c
+ *
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+/*
+ * Linux/m68k support by Hamish Macdonald
+ *
+ * 68060 fixes by Jesper Skov
+ *
+ * 1997-12-01  Modified for POSIX.1b signals by Andreas Schwab
+ *
+ * mathemu support by Roman Zippel
+ *  (Note: fpstate in the signal context is completely ignored for the emulator
+ *         and the internal floating point format is put on stack)
+ */
+
+/*
+ * ++roman (07/09/96): implemented signal stacks (specially for tosemu on
+ * Atari :-) Current limitation: Only one sigstack can be active at one time.
+ * If a second signal with SA_ONSTACK set arrives while working on a sigstack,
+ * SA_ONSTACK is ignored. This behaviour avoids lots of trouble with nested
+ * signal handlers!
+ */
+
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/kernel.h>
+#include <linux/signal.h>
+#include <linux/syscalls.h>
+#include <linux/errno.h>
+#include <linux/wait.h>
+#include <linux/ptrace.h>
+#include <linux/unistd.h>
+#include <linux/stddef.h>
+#include <linux/highuid.h>
+#include <linux/personality.h>
+#include <linux/tty.h>
+#include <linux/binfmts.h>
+#include <linux/module.h>
+
+#include <asm/setup.h>
+#include <asm/uaccess.h>
+#include <asm/pgtable.h>
+#include <asm/traps.h>
+#include <asm/ucontext.h>
+
+#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+
+static const int frame_extra_sizes[16] = {
+  [1]	= -1, /* sizeof(((struct frame *)0)->un.fmt1), */
+  [2]	= sizeof(((struct frame *)0)->un.fmt2),
+  [3]	= sizeof(((struct frame *)0)->un.fmt3),
+  [4]	= sizeof(((struct frame *)0)->un.fmt4),
+  [5]	= -1, /* sizeof(((struct frame *)0)->un.fmt5), */
+  [6]	= -1, /* sizeof(((struct frame *)0)->un.fmt6), */
+  [7]	= sizeof(((struct frame *)0)->un.fmt7),
+  [8]	= -1, /* sizeof(((struct frame *)0)->un.fmt8), */
+  [9]	= sizeof(((struct frame *)0)->un.fmt9),
+  [10]	= sizeof(((struct frame *)0)->un.fmta),
+  [11]	= sizeof(((struct frame *)0)->un.fmtb),
+  [12]	= -1, /* sizeof(((struct frame *)0)->un.fmtc), */
+  [13]	= -1, /* sizeof(((struct frame *)0)->un.fmtd), */
+  [14]	= -1, /* sizeof(((struct frame *)0)->un.fmte), */
+  [15]	= -1, /* sizeof(((struct frame *)0)->un.fmtf), */
+};
+
+int handle_kernel_fault(struct pt_regs *regs)
+{
+	const struct exception_table_entry *fixup;
+	struct pt_regs *tregs;
+
+	/* Are we prepared to handle this kernel fault? */
+	fixup = search_exception_tables(regs->pc);
+	if (!fixup)
+		return 0;
+
+	/* Create a new four word stack frame, discarding the old one. */
+	regs->stkadj = frame_extra_sizes[regs->format];
+	tregs =	(struct pt_regs *)((long)regs + regs->stkadj);
+	tregs->vector = regs->vector;
+	tregs->format = 0;
+	tregs->pc = fixup->fixup;
+	tregs->sr = regs->sr;
+
+	return 1;
+}
+
+/*
+ * Atomically swap in the new signal mask, and wait for a signal.
+ */
+asmlinkage int
+sys_sigsuspend(int unused0, int unused1, old_sigset_t mask)
+{
+	mask &= _BLOCKABLE;
+	spin_lock_irq(&current->sighand->siglock);
+	current->saved_sigmask = current->blocked;
+	siginitset(&current->blocked, mask);
+	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
+
+	current->state = TASK_INTERRUPTIBLE;
+	schedule();
+	set_restore_sigmask();
+
+	return -ERESTARTNOHAND;
+}
+
+asmlinkage int
+sys_sigaction(int sig, const struct old_sigaction __user *act,
+	      struct old_sigaction __user *oact)
+{
+	struct k_sigaction new_ka, old_ka;
+	int ret;
+
+	if (act) {
+		old_sigset_t mask;
+		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
+		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
+		    __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
+		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
+		    __get_user(mask, &act->sa_mask))
+			return -EFAULT;
+		siginitset(&new_ka.sa.sa_mask, mask);
+	}
+
+	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
+
+	if (!ret && oact) {
+		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
+		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
+		    __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
+		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
+		    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
+			return -EFAULT;
+	}
+
+	return ret;
+}
+
+asmlinkage int
+sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
+{
+	return do_sigaltstack(uss, uoss, rdusp());
+}
+
+
+/*
+ * Do a signal return; undo the signal stack.
+ *
+ * Keep the return code on the stack quadword aligned!
+ * That makes the cache flush below easier.
+ */
+
+struct sigframe
+{
+	char __user *pretcode;
+	int sig;
+	int code;
+	struct sigcontext __user *psc;
+	char retcode[8];
+	unsigned long extramask[_NSIG_WORDS-1];
+	struct sigcontext sc;
+};
+
+struct rt_sigframe
+{
+	char __user *pretcode;
+	int sig;
+	struct siginfo __user *pinfo;
+	void __user *puc;
+	char retcode[8];
+	struct siginfo info;
+	struct ucontext uc;
+};
+
+
+static unsigned char fpu_version;	/* version number of fpu, set by setup_frame */
+
+static inline int restore_fpu_state(struct sigcontext *sc)
+{
+	int err = 1;
+
+	if (FPU_IS_EMU) {
+	    /* restore registers */
+	    memcpy(current->thread.fpcntl, sc->sc_fpcntl, 12);
+	    memcpy(current->thread.fp, sc->sc_fpregs, 24);
+	    return 0;
+	}
+
+	if (CPU_IS_060 ? sc->sc_fpstate[2] : sc->sc_fpstate[0]) {
+	    /* Verify the frame format.  */
+	    if (!CPU_IS_060 && (sc->sc_fpstate[0] != fpu_version))
+		goto out;
+	    if (CPU_IS_020_OR_030) {
+		if (m68k_fputype & FPU_68881 &&
+		    !(sc->sc_fpstate[1] == 0x18 || sc->sc_fpstate[1] == 0xb4))
+		    goto out;
+		if (m68k_fputype & FPU_68882 &&
+		    !(sc->sc_fpstate[1] == 0x38 || sc->sc_fpstate[1] == 0xd4))
+		    goto out;
+	    } else if (CPU_IS_040) {
+		if (!(sc->sc_fpstate[1] == 0x00 ||
+                      sc->sc_fpstate[1] == 0x28 ||
+                      sc->sc_fpstate[1] == 0x60))
+		    goto out;
+	    } else if (CPU_IS_060) {
+		if (!(sc->sc_fpstate[3] == 0x00 ||
+                      sc->sc_fpstate[3] == 0x60 ||
+		      sc->sc_fpstate[3] == 0xe0))
+		    goto out;
+	    } else
+		goto out;
+
+	    __asm__ volatile (".chip 68k/68881\n\t"
+			      "fmovemx %0,%%fp0-%%fp1\n\t"
+			      "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t"
+			      ".chip 68k"
+			      : /* no outputs */
+			      : "m" (*sc->sc_fpregs), "m" (*sc->sc_fpcntl));
+	}
+	__asm__ volatile (".chip 68k/68881\n\t"
+			  "frestore %0\n\t"
+			  ".chip 68k" : : "m" (*sc->sc_fpstate));
+	err = 0;
+
+out:
+	return err;
+}
+
+#define FPCONTEXT_SIZE	216
+#define uc_fpstate	uc_filler[0]
+#define uc_formatvec	uc_filler[FPCONTEXT_SIZE/4]
+#define uc_extra	uc_filler[FPCONTEXT_SIZE/4+1]
+
+static inline int rt_restore_fpu_state(struct ucontext __user *uc)
+{
+	unsigned char fpstate[FPCONTEXT_SIZE];
+	int context_size = CPU_IS_060 ? 8 : 0;
+	fpregset_t fpregs;
+	int err = 1;
+
+	if (FPU_IS_EMU) {
+		/* restore fpu control register */
+		if (__copy_from_user(current->thread.fpcntl,
+				uc->uc_mcontext.fpregs.f_fpcntl, 12))
+			goto out;
+		/* restore all other fpu register */
+		if (__copy_from_user(current->thread.fp,
+				uc->uc_mcontext.fpregs.f_fpregs, 96))
+			goto out;
+		return 0;
+	}
+
+	if (__get_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate))
+		goto out;
+	if (CPU_IS_060 ? fpstate[2] : fpstate[0]) {
+		if (!CPU_IS_060)
+			context_size = fpstate[1];
+		/* Verify the frame format.  */
+		if (!CPU_IS_060 && (fpstate[0] != fpu_version))
+			goto out;
+		if (CPU_IS_020_OR_030) {
+			if (m68k_fputype & FPU_68881 &&
+			    !(context_size == 0x18 || context_size == 0xb4))
+				goto out;
+			if (m68k_fputype & FPU_68882 &&
+			    !(context_size == 0x38 || context_size == 0xd4))
+				goto out;
+		} else if (CPU_IS_040) {
+			if (!(context_size == 0x00 ||
+			      context_size == 0x28 ||
+			      context_size == 0x60))
+				goto out;
+		} else if (CPU_IS_060) {
+			if (!(fpstate[3] == 0x00 ||
+			      fpstate[3] == 0x60 ||
+			      fpstate[3] == 0xe0))
+				goto out;
+		} else
+			goto out;
+		if (__copy_from_user(&fpregs, &uc->uc_mcontext.fpregs,
+				     sizeof(fpregs)))
+			goto out;
+		__asm__ volatile (".chip 68k/68881\n\t"
+				  "fmovemx %0,%%fp0-%%fp7\n\t"
+				  "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t"
+				  ".chip 68k"
+				  : /* no outputs */
+				  : "m" (*fpregs.f_fpregs),
+				    "m" (*fpregs.f_fpcntl));
+	}
+	if (context_size &&
+	    __copy_from_user(fpstate + 4, (long __user *)&uc->uc_fpstate + 1,
+			     context_size))
+		goto out;
+	__asm__ volatile (".chip 68k/68881\n\t"
+			  "frestore %0\n\t"
+			  ".chip 68k" : : "m" (*fpstate));
+	err = 0;
+
+out:
+	return err;
+}
+
+static int mangle_kernel_stack(struct pt_regs *regs, int formatvec,
+			       void __user *fp)
+{
+	int fsize = frame_extra_sizes[formatvec >> 12];
+	if (fsize < 0) {
+		/*
+		 * user process trying to return with weird frame format
+		 */
+#ifdef DEBUG
+		printk("user process returning with weird frame format\n");
+#endif
+		return 1;
+	}
+	if (!fsize) {
+		regs->format = formatvec >> 12;
+		regs->vector = formatvec & 0xfff;
+	} else {
+		struct switch_stack *sw = (struct switch_stack *)regs - 1;
+		unsigned long buf[fsize / 2]; /* yes, twice as much */
+
+		/* that'll make sure that expansion won't crap over data */
+		if (copy_from_user(buf + fsize / 4, fp, fsize))
+			return 1;
+
+		/* point of no return */
+		regs->format = formatvec >> 12;
+		regs->vector = formatvec & 0xfff;
+#define frame_offset (sizeof(struct pt_regs)+sizeof(struct switch_stack))
+		__asm__ __volatile__
+			("   movel %0,%/a0\n\t"
+			 "   subl %1,%/a0\n\t"     /* make room on stack */
+			 "   movel %/a0,%/sp\n\t"  /* set stack pointer */
+			 /* move switch_stack and pt_regs */
+			 "1: movel %0@+,%/a0@+\n\t"
+			 "   dbra %2,1b\n\t"
+			 "   lea %/sp@(%c3),%/a0\n\t" /* add offset of fmt */
+			 "   lsrl  #2,%1\n\t"
+			 "   subql #1,%1\n\t"
+			 /* copy to the gap we'd made */
+			 "2: movel %4@+,%/a0@+\n\t"
+			 "   dbra %1,2b\n\t"
+			 "   bral ret_from_signal\n"
+			 : /* no outputs, it doesn't ever return */
+			 : "a" (sw), "d" (fsize), "d" (frame_offset/4-1),
+			   "n" (frame_offset), "a" (buf + fsize/4)
+			 : "a0");
+#undef frame_offset
+	}
+	return 0;
+}
+
+static inline int
+restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *usc, void __user *fp)
+{
+	int formatvec;
+	struct sigcontext context;
+	int err;
+
+	/* Always make any pending restarted system calls return -EINTR */
+	current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
+	/* get previous context */
+	if (copy_from_user(&context, usc, sizeof(context)))
+		goto badframe;
+
+	/* restore passed registers */
+	regs->d0 = context.sc_d0;
+	regs->d1 = context.sc_d1;
+	regs->a0 = context.sc_a0;
+	regs->a1 = context.sc_a1;
+	regs->sr = (regs->sr & 0xff00) | (context.sc_sr & 0xff);
+	regs->pc = context.sc_pc;
+	regs->orig_d0 = -1;		/* disable syscall checks */
+	wrusp(context.sc_usp);
+	formatvec = context.sc_formatvec;
+
+	err = restore_fpu_state(&context);
+
+	if (err || mangle_kernel_stack(regs, formatvec, fp))
+		goto badframe;
+
+	return 0;
+
+badframe:
+	return 1;
+}
+
+static inline int
+rt_restore_ucontext(struct pt_regs *regs, struct switch_stack *sw,
+		    struct ucontext __user *uc)
+{
+	int temp;
+	greg_t __user *gregs = uc->uc_mcontext.gregs;
+	unsigned long usp;
+	int err;
+
+	/* Always make any pending restarted system calls return -EINTR */
+	current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
+	err = __get_user(temp, &uc->uc_mcontext.version);
+	if (temp != MCONTEXT_VERSION)
+		goto badframe;
+	/* restore passed registers */
+	err |= __get_user(regs->d0, &gregs[0]);
+	err |= __get_user(regs->d1, &gregs[1]);
+	err |= __get_user(regs->d2, &gregs[2]);
+	err |= __get_user(regs->d3, &gregs[3]);
+	err |= __get_user(regs->d4, &gregs[4]);
+	err |= __get_user(regs->d5, &gregs[5]);
+	err |= __get_user(sw->d6, &gregs[6]);
+	err |= __get_user(sw->d7, &gregs[7]);
+	err |= __get_user(regs->a0, &gregs[8]);
+	err |= __get_user(regs->a1, &gregs[9]);
+	err |= __get_user(regs->a2, &gregs[10]);
+	err |= __get_user(sw->a3, &gregs[11]);
+	err |= __get_user(sw->a4, &gregs[12]);
+	err |= __get_user(sw->a5, &gregs[13]);
+	err |= __get_user(sw->a6, &gregs[14]);
+	err |= __get_user(usp, &gregs[15]);
+	wrusp(usp);
+	err |= __get_user(regs->pc, &gregs[16]);
+	err |= __get_user(temp, &gregs[17]);
+	regs->sr = (regs->sr & 0xff00) | (temp & 0xff);
+	regs->orig_d0 = -1;		/* disable syscall checks */
+	err |= __get_user(temp, &uc->uc_formatvec);
+
+	err |= rt_restore_fpu_state(uc);
+
+	if (err || do_sigaltstack(&uc->uc_stack, NULL, usp) == -EFAULT)
+		goto badframe;
+
+	if (mangle_kernel_stack(regs, temp, &uc->uc_extra))
+		goto badframe;
+
+	return 0;
+
+badframe:
+	return 1;
+}
+
+asmlinkage int do_sigreturn(unsigned long __unused)
+{
+	struct switch_stack *sw = (struct switch_stack *) &__unused;
+	struct pt_regs *regs = (struct pt_regs *) (sw + 1);
+	unsigned long usp = rdusp();
+	struct sigframe __user *frame = (struct sigframe __user *)(usp - 4);
+	sigset_t set;
+
+	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+		goto badframe;
+	if (__get_user(set.sig[0], &frame->sc.sc_mask) ||
+	    (_NSIG_WORDS > 1 &&
+	     __copy_from_user(&set.sig[1], &frame->extramask,
+			      sizeof(frame->extramask))))
+		goto badframe;
+
+	sigdelsetmask(&set, ~_BLOCKABLE);
+	current->blocked = set;
+	recalc_sigpending();
+
+	if (restore_sigcontext(regs, &frame->sc, frame + 1))
+		goto badframe;
+	return regs->d0;
+
+badframe:
+	force_sig(SIGSEGV, current);
+	return 0;
+}
+
+asmlinkage int do_rt_sigreturn(unsigned long __unused)
+{
+	struct switch_stack *sw = (struct switch_stack *) &__unused;
+	struct pt_regs *regs = (struct pt_regs *) (sw + 1);
+	unsigned long usp = rdusp();
+	struct rt_sigframe __user *frame = (struct rt_sigframe __user *)(usp - 4);
+	sigset_t set;
+
+	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+		goto badframe;
+	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
+		goto badframe;
+
+	sigdelsetmask(&set, ~_BLOCKABLE);
+	current->blocked = set;
+	recalc_sigpending();
+
+	if (rt_restore_ucontext(regs, sw, &frame->uc))
+		goto badframe;
+	return regs->d0;
+
+badframe:
+	force_sig(SIGSEGV, current);
+	return 0;
+}
+
+/*
+ * Set up a signal frame.
+ */
+
+static inline void save_fpu_state(struct sigcontext *sc, struct pt_regs *regs)
+{
+	if (FPU_IS_EMU) {
+		/* save registers */
+		memcpy(sc->sc_fpcntl, current->thread.fpcntl, 12);
+		memcpy(sc->sc_fpregs, current->thread.fp, 24);
+		return;
+	}
+
+	__asm__ volatile (".chip 68k/68881\n\t"
+			  "fsave %0\n\t"
+			  ".chip 68k"
+			  : : "m" (*sc->sc_fpstate) : "memory");
+
+	if (CPU_IS_060 ? sc->sc_fpstate[2] : sc->sc_fpstate[0]) {
+		fpu_version = sc->sc_fpstate[0];
+		if (CPU_IS_020_OR_030 &&
+		    regs->vector >= (VEC_FPBRUC * 4) &&
+		    regs->vector <= (VEC_FPNAN * 4)) {
+			/* Clear pending exception in 68882 idle frame */
+			if (*(unsigned short *) sc->sc_fpstate == 0x1f38)
+				sc->sc_fpstate[0x38] |= 1 << 3;
+		}
+		__asm__ volatile (".chip 68k/68881\n\t"
+				  "fmovemx %%fp0-%%fp1,%0\n\t"
+				  "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t"
+				  ".chip 68k"
+				  : "=m" (*sc->sc_fpregs),
+				    "=m" (*sc->sc_fpcntl)
+				  : /* no inputs */
+				  : "memory");
+	}
+}
+
+static inline int rt_save_fpu_state(struct ucontext __user *uc, struct pt_regs *regs)
+{
+	unsigned char fpstate[FPCONTEXT_SIZE];
+	int context_size = CPU_IS_060 ? 8 : 0;
+	int err = 0;
+
+	if (FPU_IS_EMU) {
+		/* save fpu control register */
+		err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpcntl,
+				current->thread.fpcntl, 12);
+		/* save all other fpu register */
+		err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpregs,
+				current->thread.fp, 96);
+		return err;
+	}
+
+	__asm__ volatile (".chip 68k/68881\n\t"
+			  "fsave %0\n\t"
+			  ".chip 68k"
+			  : : "m" (*fpstate) : "memory");
+
+	err |= __put_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate);
+	if (CPU_IS_060 ? fpstate[2] : fpstate[0]) {
+		fpregset_t fpregs;
+		if (!CPU_IS_060)
+			context_size = fpstate[1];
+		fpu_version = fpstate[0];
+		if (CPU_IS_020_OR_030 &&
+		    regs->vector >= (VEC_FPBRUC * 4) &&
+		    regs->vector <= (VEC_FPNAN * 4)) {
+			/* Clear pending exception in 68882 idle frame */
+			if (*(unsigned short *) fpstate == 0x1f38)
+				fpstate[0x38] |= 1 << 3;
+		}
+		__asm__ volatile (".chip 68k/68881\n\t"
+				  "fmovemx %%fp0-%%fp7,%0\n\t"
+				  "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t"
+				  ".chip 68k"
+				  : "=m" (*fpregs.f_fpregs),
+				    "=m" (*fpregs.f_fpcntl)
+				  : /* no inputs */
+				  : "memory");
+		err |= copy_to_user(&uc->uc_mcontext.fpregs, &fpregs,
+				    sizeof(fpregs));
+	}
+	if (context_size)
+		err |= copy_to_user((long __user *)&uc->uc_fpstate + 1, fpstate + 4,
+				    context_size);
+	return err;
+}
+
+static void setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs,
+			     unsigned long mask)
+{
+	sc->sc_mask = mask;
+	sc->sc_usp = rdusp();
+	sc->sc_d0 = regs->d0;
+	sc->sc_d1 = regs->d1;
+	sc->sc_a0 = regs->a0;
+	sc->sc_a1 = regs->a1;
+	sc->sc_sr = regs->sr;
+	sc->sc_pc = regs->pc;
+	sc->sc_formatvec = regs->format << 12 | regs->vector;
+	save_fpu_state(sc, regs);
+}
+
+static inline int rt_setup_ucontext(struct ucontext __user *uc, struct pt_regs *regs)
+{
+	struct switch_stack *sw = (struct switch_stack *)regs - 1;
+	greg_t __user *gregs = uc->uc_mcontext.gregs;
+	int err = 0;
+
+	err |= __put_user(MCONTEXT_VERSION, &uc->uc_mcontext.version);
+	err |= __put_user(regs->d0, &gregs[0]);
+	err |= __put_user(regs->d1, &gregs[1]);
+	err |= __put_user(regs->d2, &gregs[2]);
+	err |= __put_user(regs->d3, &gregs[3]);
+	err |= __put_user(regs->d4, &gregs[4]);
+	err |= __put_user(regs->d5, &gregs[5]);
+	err |= __put_user(sw->d6, &gregs[6]);
+	err |= __put_user(sw->d7, &gregs[7]);
+	err |= __put_user(regs->a0, &gregs[8]);
+	err |= __put_user(regs->a1, &gregs[9]);
+	err |= __put_user(regs->a2, &gregs[10]);
+	err |= __put_user(sw->a3, &gregs[11]);
+	err |= __put_user(sw->a4, &gregs[12]);
+	err |= __put_user(sw->a5, &gregs[13]);
+	err |= __put_user(sw->a6, &gregs[14]);
+	err |= __put_user(rdusp(), &gregs[15]);
+	err |= __put_user(regs->pc, &gregs[16]);
+	err |= __put_user(regs->sr, &gregs[17]);
+	err |= __put_user((regs->format << 12) | regs->vector, &uc->uc_formatvec);
+	err |= rt_save_fpu_state(uc, regs);
+	return err;
+}
+
+static inline void push_cache (unsigned long vaddr)
+{
+	/*
+	 * Using the old cache_push_v() was really a big waste.
+	 *
+	 * What we are trying to do is to flush 8 bytes to ram.
+	 * Flushing 2 cache lines of 16 bytes is much cheaper than
+	 * flushing 1 or 2 pages, as previously done in
+	 * cache_push_v().
+	 *                                                     Jes
+	 */
+	if (CPU_IS_040) {
+		unsigned long temp;
+
+		__asm__ __volatile__ (".chip 68040\n\t"
+				      "nop\n\t"
+				      "ptestr (%1)\n\t"
+				      "movec %%mmusr,%0\n\t"
+				      ".chip 68k"
+				      : "=r" (temp)
+				      : "a" (vaddr));
+
+		temp &= PAGE_MASK;
+		temp |= vaddr & ~PAGE_MASK;
+
+		__asm__ __volatile__ (".chip 68040\n\t"
+				      "nop\n\t"
+				      "cpushl %%bc,(%0)\n\t"
+				      ".chip 68k"
+				      : : "a" (temp));
+	}
+	else if (CPU_IS_060) {
+		unsigned long temp;
+		__asm__ __volatile__ (".chip 68060\n\t"
+				      "plpar (%0)\n\t"
+				      ".chip 68k"
+				      : "=a" (temp)
+				      : "0" (vaddr));
+		__asm__ __volatile__ (".chip 68060\n\t"
+				      "cpushl %%bc,(%0)\n\t"
+				      ".chip 68k"
+				      : : "a" (temp));
+	}
+	else {
+		/*
+		 * 68030/68020 have no writeback cache;
+		 * still need to clear icache.
+		 * Note that vaddr is guaranteed to be long word aligned.
+		 */
+		unsigned long temp;
+		asm volatile ("movec %%cacr,%0" : "=r" (temp));
+		temp += 4;
+		asm volatile ("movec %0,%%caar\n\t"
+			      "movec %1,%%cacr"
+			      : : "r" (vaddr), "r" (temp));
+		asm volatile ("movec %0,%%caar\n\t"
+			      "movec %1,%%cacr"
+			      : : "r" (vaddr + 4), "r" (temp));
+	}
+}
+
+static inline void __user *
+get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
+{
+	unsigned long usp;
+
+	/* Default to using normal stack.  */
+	usp = rdusp();
+
+	/* This is the X/Open sanctioned signal stack switching.  */
+	if (ka->sa.sa_flags & SA_ONSTACK) {
+		if (!sas_ss_flags(usp))
+			usp = current->sas_ss_sp + current->sas_ss_size;
+	}
+	return (void __user *)((usp - frame_size) & -8UL);
+}
+
+static int setup_frame (int sig, struct k_sigaction *ka,
+			 sigset_t *set, struct pt_regs *regs)
+{
+	struct sigframe __user *frame;
+	int fsize = frame_extra_sizes[regs->format];
+	struct sigcontext context;
+	int err = 0;
+
+	if (fsize < 0) {
+#ifdef DEBUG
+		printk ("setup_frame: Unknown frame format %#x\n",
+			regs->format);
+#endif
+		goto give_sigsegv;
+	}
+
+	frame = get_sigframe(ka, regs, sizeof(*frame) + fsize);
+
+	if (fsize)
+		err |= copy_to_user (frame + 1, regs + 1, fsize);
+
+	err |= __put_user((current_thread_info()->exec_domain
+			   && current_thread_info()->exec_domain->signal_invmap
+			   && sig < 32
+			   ? current_thread_info()->exec_domain->signal_invmap[sig]
+			   : sig),
+			  &frame->sig);
+
+	err |= __put_user(regs->vector, &frame->code);
+	err |= __put_user(&frame->sc, &frame->psc);
+
+	if (_NSIG_WORDS > 1)
+		err |= copy_to_user(frame->extramask, &set->sig[1],
+				    sizeof(frame->extramask));
+
+	setup_sigcontext(&context, regs, set->sig[0]);
+	err |= copy_to_user (&frame->sc, &context, sizeof(context));
+
+	/* Set up to return from userspace.  */
+	err |= __put_user(frame->retcode, &frame->pretcode);
+	/* moveq #,d0; trap #0 */
+	err |= __put_user(0x70004e40 + (__NR_sigreturn << 16),
+			  (long __user *)(frame->retcode));
+
+	if (err)
+		goto give_sigsegv;
+
+	push_cache ((unsigned long) &frame->retcode);
+
+	/*
+	 * Set up registers for signal handler.  All the state we are about
+	 * to destroy is successfully copied to sigframe.
+	 */
+	wrusp ((unsigned long) frame);
+	regs->pc = (unsigned long) ka->sa.sa_handler;
+
+	/*
+	 * This is subtle; if we build more than one sigframe, all but the
+	 * first one will see frame format 0 and have fsize == 0, so we won't
+	 * screw stkadj.
+	 */
+	if (fsize)
+		regs->stkadj = fsize;
+
+	/* Prepare to skip over the extra stuff in the exception frame.  */
+	if (regs->stkadj) {
+		struct pt_regs *tregs =
+			(struct pt_regs *)((ulong)regs + regs->stkadj);
+#ifdef DEBUG
+		printk("Performing stackadjust=%04x\n", regs->stkadj);
+#endif
+		/* This must be copied with decreasing addresses to
+                   handle overlaps.  */
+		tregs->vector = 0;
+		tregs->format = 0;
+		tregs->pc = regs->pc;
+		tregs->sr = regs->sr;
+	}
+	return 0;
+
+give_sigsegv:
+	force_sigsegv(sig, current);
+	return err;
+}
+
+static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
+			    sigset_t *set, struct pt_regs *regs)
+{
+	struct rt_sigframe __user *frame;
+	int fsize = frame_extra_sizes[regs->format];
+	int err = 0;
+
+	if (fsize < 0) {
+#ifdef DEBUG
+		printk ("setup_frame: Unknown frame format %#x\n",
+			regs->format);
+#endif
+		goto give_sigsegv;
+	}
+
+	frame = get_sigframe(ka, regs, sizeof(*frame));
+
+	if (fsize)
+		err |= copy_to_user (&frame->uc.uc_extra, regs + 1, fsize);
+
+	err |= __put_user((current_thread_info()->exec_domain
+			   && current_thread_info()->exec_domain->signal_invmap
+			   && sig < 32
+			   ? current_thread_info()->exec_domain->signal_invmap[sig]
+			   : sig),
+			  &frame->sig);
+	err |= __put_user(&frame->info, &frame->pinfo);
+	err |= __put_user(&frame->uc, &frame->puc);
+	err |= copy_siginfo_to_user(&frame->info, info);
+
+	/* Create the ucontext.  */
+	err |= __put_user(0, &frame->uc.uc_flags);
+	err |= __put_user(NULL, &frame->uc.uc_link);
+	err |= __put_user((void __user *)current->sas_ss_sp,
+			  &frame->uc.uc_stack.ss_sp);
+	err |= __put_user(sas_ss_flags(rdusp()),
+			  &frame->uc.uc_stack.ss_flags);
+	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+	err |= rt_setup_ucontext(&frame->uc, regs);
+	err |= copy_to_user (&frame->uc.uc_sigmask, set, sizeof(*set));
+
+	/* Set up to return from userspace.  */
+	err |= __put_user(frame->retcode, &frame->pretcode);
+#ifdef __mcoldfire__
+	/* movel #__NR_rt_sigreturn,d0; trap #0 */
+	err |= __put_user(0x203c0000, (long __user *)(frame->retcode + 0));
+	err |= __put_user(0x00004e40 + (__NR_rt_sigreturn << 16),
+			  (long __user *)(frame->retcode + 4));
+#else
+	/* moveq #,d0; notb d0; trap #0 */
+	err |= __put_user(0x70004600 + ((__NR_rt_sigreturn ^ 0xff) << 16),
+			  (long __user *)(frame->retcode + 0));
+	err |= __put_user(0x4e40, (short __user *)(frame->retcode + 4));
+#endif
+
+	if (err)
+		goto give_sigsegv;
+
+	push_cache ((unsigned long) &frame->retcode);
+
+	/*
+	 * Set up registers for signal handler.  All the state we are about
+	 * to destroy is successfully copied to sigframe.
+	 */
+	wrusp ((unsigned long) frame);
+	regs->pc = (unsigned long) ka->sa.sa_handler;
+
+	/*
+	 * This is subtle; if we build more than one sigframe, all but the
+	 * first one will see frame format 0 and have fsize == 0, so we won't
+	 * screw stkadj.
+	 */
+	if (fsize)
+		regs->stkadj = fsize;
+
+	/* Prepare to skip over the extra stuff in the exception frame.  */
+	if (regs->stkadj) {
+		struct pt_regs *tregs =
+			(struct pt_regs *)((ulong)regs + regs->stkadj);
+#ifdef DEBUG
+		printk("Performing stackadjust=%04x\n", regs->stkadj);
+#endif
+		/* This must be copied with decreasing addresses to
+                   handle overlaps.  */
+		tregs->vector = 0;
+		tregs->format = 0;
+		tregs->pc = regs->pc;
+		tregs->sr = regs->sr;
+	}
+	return 0;
+
+give_sigsegv:
+	force_sigsegv(sig, current);
+	return err;
+}
+
+static inline void
+handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
+{
+	switch (regs->d0) {
+	case -ERESTARTNOHAND:
+		if (!has_handler)
+			goto do_restart;
+		regs->d0 = -EINTR;
+		break;
+
+	case -ERESTART_RESTARTBLOCK:
+		if (!has_handler) {
+			regs->d0 = __NR_restart_syscall;
+			regs->pc -= 2;
+			break;
+		}
+		regs->d0 = -EINTR;
+		break;
+
+	case -ERESTARTSYS:
+		if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) {
+			regs->d0 = -EINTR;
+			break;
+		}
+	/* fallthrough */
+	case -ERESTARTNOINTR:
+	do_restart:
+		regs->d0 = regs->orig_d0;
+		regs->pc -= 2;
+		break;
+	}
+}
+
+void ptrace_signal_deliver(struct pt_regs *regs, void *cookie)
+{
+	if (regs->orig_d0 < 0)
+		return;
+	switch (regs->d0) {
+	case -ERESTARTNOHAND:
+	case -ERESTARTSYS:
+	case -ERESTARTNOINTR:
+		regs->d0 = regs->orig_d0;
+		regs->orig_d0 = -1;
+		regs->pc -= 2;
+		break;
+	}
+}
+
+/*
+ * OK, we're invoking a handler
+ */
+static void
+handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info,
+	      sigset_t *oldset, struct pt_regs *regs)
+{
+	int err;
+	/* are we from a system call? */
+	if (regs->orig_d0 >= 0)
+		/* If so, check system call restarting.. */
+		handle_restart(regs, ka, 1);
+
+	/* set up the stack frame */
+	if (ka->sa.sa_flags & SA_SIGINFO)
+		err = setup_rt_frame(sig, ka, info, oldset, regs);
+	else
+		err = setup_frame(sig, ka, oldset, regs);
+
+	if (err)
+		return;
+
+	sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
+	if (!(ka->sa.sa_flags & SA_NODEFER))
+		sigaddset(&current->blocked,sig);
+	recalc_sigpending();
+
+	if (test_thread_flag(TIF_DELAYED_TRACE)) {
+		regs->sr &= ~0x8000;
+		send_sig(SIGTRAP, current, 1);
+	}
+
+	clear_thread_flag(TIF_RESTORE_SIGMASK);
+}
+
+/*
+ * Note that 'init' is a special process: it doesn't get signals it doesn't
+ * want to handle. Thus you cannot kill init even with a SIGKILL even by
+ * mistake.
+ */
+asmlinkage void do_signal(struct pt_regs *regs)
+{
+	siginfo_t info;
+	struct k_sigaction ka;
+	int signr;
+	sigset_t *oldset;
+
+	current->thread.esp0 = (unsigned long) regs;
+
+	if (test_thread_flag(TIF_RESTORE_SIGMASK))
+		oldset = &current->saved_sigmask;
+	else
+		oldset = &current->blocked;
+
+	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
+	if (signr > 0) {
+		/* Whee!  Actually deliver the signal.  */
+		handle_signal(signr, &ka, &info, oldset, regs);
+		return;
+	}
+
+	/* Did we come from a system call? */
+	if (regs->orig_d0 >= 0)
+		/* Restart the system call - no handlers present */
+		handle_restart(regs, NULL, 0);
+
+	/* If there's no signal to deliver, we just restore the saved mask.  */
+	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+		clear_thread_flag(TIF_RESTORE_SIGMASK);
+		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
+	}
+}

arch/m68k/kernel/sys_m68k.c

···
-/*
- * linux/arch/m68k/kernel/sys_m68k.c
- *
- * This file contains various random system calls that
- * have a non-standard calling sequence on the Linux/m68k
- * platform.
- */
-
-#include <linux/capability.h>
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/fs.h>
-#include <linux/smp.h>
-#include <linux/sem.h>
-#include <linux/msg.h>
-#include <linux/shm.h>
-#include <linux/stat.h>
-#include <linux/syscalls.h>
-#include <linux/mman.h>
-#include <linux/file.h>
-#include <linux/ipc.h>
-
-#include <asm/setup.h>
-#include <asm/uaccess.h>
-#include <asm/cachectl.h>
-#include <asm/traps.h>
-#include <asm/page.h>
-#include <asm/unistd.h>
-#include <linux/elf.h>
-#include <asm/tlb.h>
-
-asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address,
-			     unsigned long error_code);
-
-asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
-	unsigned long prot, unsigned long flags,
-	unsigned long fd, unsigned long pgoff)
-{
-	/*
-	 * This is wrong for sun3 - there PAGE_SIZE is 8Kb,
-	 * so we need to shift the argument down by 1; m68k mmap64(3)
-	 * (in libc) expects the last argument of mmap2 in 4Kb units.
-	 */
-	return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff);
-}
-
-/* Convert virtual (user) address VADDR to physical address PADDR */
-#define virt_to_phys_040(vaddr)						\
-({									\
-  unsigned long _mmusr, _paddr;						\
-									\
-  __asm__ __volatile__ (".chip 68040\n\t"				\
-			"ptestr (%1)\n\t"				\
-			"movec %%mmusr,%0\n\t"				\
-			".chip 68k"					\
-			: "=r" (_mmusr)					\
-			: "a" (vaddr));					\
-  _paddr = (_mmusr & MMU_R_040) ? (_mmusr & PAGE_MASK) : 0;		\
-  _paddr;								\
-})
-
-static inline int
-cache_flush_040 (unsigned long addr, int scope, int cache, unsigned long len)
-{
-  unsigned long paddr, i;
-
-  switch (scope)
-    {
-    case FLUSH_SCOPE_ALL:
-      switch (cache)
-	{
-	case FLUSH_CACHE_DATA:
-	  /* This nop is needed for some broken versions of the 68040.  */
-	  __asm__ __volatile__ ("nop\n\t"
-				".chip 68040\n\t"
-				"cpusha %dc\n\t"
-				".chip 68k");
-	  break;
-	case FLUSH_CACHE_INSN:
-	  __asm__ __volatile__ ("nop\n\t"
-				".chip 68040\n\t"
-				"cpusha %ic\n\t"
-				".chip 68k");
-	  break;
-	default:
-	case FLUSH_CACHE_BOTH:
-	  __asm__ __volatile__ ("nop\n\t"
-				".chip 68040\n\t"
-				"cpusha %bc\n\t"
-				".chip 68k");
-	  break;
-	}
-      break;
-
-    case FLUSH_SCOPE_LINE:
-      /* Find the physical address of the first mapped page in the
-	 address range.  */
-      if ((paddr = virt_to_phys_040(addr))) {
-        paddr += addr & ~(PAGE_MASK | 15);
-        len = (len + (addr & 15) + 15) >> 4;
-      } else {
-	unsigned long tmp = PAGE_SIZE - (addr & ~PAGE_MASK);
-
-	if (len <= tmp)
-	  return 0;
-	addr += tmp;
-	len -= tmp;
-	tmp = PAGE_SIZE;
-	for (;;)
-	  {
-	    if ((paddr = virt_to_phys_040(addr)))
-	      break;
-	    if (len <= tmp)
-	      return 0;
-	    addr += tmp;
-	    len -= tmp;
-	  }
-	len = (len + 15) >> 4;
-      }
-      i = (PAGE_SIZE - (paddr & ~PAGE_MASK)) >> 4;
-      while (len--)
-	{
-	  switch (cache)
-	    {
-	    case FLUSH_CACHE_DATA:
-	      __asm__ __volatile__ ("nop\n\t"
-				    ".chip 68040\n\t"
-				    "cpushl %%dc,(%0)\n\t"
-				    ".chip 68k"
-				    : : "a" (paddr));
-	      break;
-	    case FLUSH_CACHE_INSN:
-	      __asm__ __volatile__ ("nop\n\t"
-				    ".chip 68040\n\t"
-				    "cpushl %%ic,(%0)\n\t"
-				    ".chip 68k"
-				    : : "a" (paddr));
-	      break;
-	    default:
-	    case FLUSH_CACHE_BOTH:
-	      __asm__ __volatile__ ("nop\n\t"
-				    ".chip 68040\n\t"
-				    "cpushl %%bc,(%0)\n\t"
-				    ".chip 68k"
-				    : : "a" (paddr));
-	      break;
-	    }
-	  if (!--i && len)
-	    {
-	      /*
-	       * No need to page align here since it is done by
-	       * virt_to_phys_040().
-	       */
-	      addr += PAGE_SIZE;
-	      i = PAGE_SIZE / 16;
-	      /* Recompute physical address when crossing a page
-	         boundary. */
-	      for (;;)
-		{
-		  if ((paddr = virt_to_phys_040(addr)))
-		    break;
-		  if (len <= i)
-		    return 0;
-		  len -= i;
-		  addr += PAGE_SIZE;
-		}
-	    }
-	  else
-	    paddr += 16;
-	}
-      break;
-
-    default:
-    case FLUSH_SCOPE_PAGE:
-      len += (addr & ~PAGE_MASK) + (PAGE_SIZE - 1);
-      for (len >>= PAGE_SHIFT; len--; addr += PAGE_SIZE)
-	{
-	  if (!(paddr = virt_to_phys_040(addr)))
-	    continue;
-	  switch (cache)
-	    {
-	    case FLUSH_CACHE_DATA:
-	      __asm__ __volatile__ ("nop\n\t"
-				    ".chip 68040\n\t"
-				    "cpushp %%dc,(%0)\n\t"
-				    ".chip 68k"
-				    : : "a" (paddr));
-	      break;
-	    case FLUSH_CACHE_INSN:
-	      __asm__ __volatile__ ("nop\n\t"
-				    ".chip 68040\n\t"
-				    "cpushp %%ic,(%0)\n\t"
-				    ".chip 68k"
-				    : : "a" (paddr));
-	      break;
-	    default:
-	    case FLUSH_CACHE_BOTH:
-	      __asm__ __volatile__ ("nop\n\t"
-				    ".chip 68040\n\t"
-				    "cpushp %%bc,(%0)\n\t"
-				    ".chip 68k"
-				    : : "a" (paddr));
-	      break;
-	    }
-	}
-      break;
-    }
-  return 0;
-}
-
-#define virt_to_phys_060(vaddr)				\
-({							\
-  unsigned long paddr;					\
-  __asm__ __volatile__ (".chip 68060\n\t"		\
-			"plpar (%0)\n\t"		\
-			".chip 68k"			\
-			: "=a" (paddr)			\
-			: "0" (vaddr));			\
-  (paddr); /* XXX */					\
-})
-
-static inline int
-cache_flush_060 (unsigned long addr, int scope, int cache, unsigned long len)
-{
-  unsigned long paddr, i;
-
-  /*
-   * 68060 manual says:
-   *  cpush %dc : flush DC, remains valid (with our %cacr setup)
-   *  cpush %ic : invalidate IC
-   *  cpush %bc : flush DC + invalidate IC
-   */
-  switch (scope)
-    {
-    case FLUSH_SCOPE_ALL:
-      switch (cache)
-	{
-	case FLUSH_CACHE_DATA:
-	  __asm__ __volatile__ (".chip 68060\n\t"
-				"cpusha %dc\n\t"
-				".chip 68k");
-	  break;
-	case FLUSH_CACHE_INSN:
-	  __asm__ __volatile__ (".chip 68060\n\t"
-				"cpusha %ic\n\t"
-				".chip 68k");
-	  break;
-	default:
-	case FLUSH_CACHE_BOTH:
-	  __asm__ __volatile__ (".chip 68060\n\t"
-				"cpusha %bc\n\t"
-				".chip 68k");
-	  break;
-	}
-      break;
-
-    case FLUSH_SCOPE_LINE:
-      /* Find the physical address of the first mapped page in the
-	 address range.  */
-      len += addr & 15;
-      addr &= -16;
-      if (!(paddr = virt_to_phys_060(addr))) {
-	unsigned long tmp = PAGE_SIZE - (addr & ~PAGE_MASK);
-
-	if (len <= tmp)
-	  return 0;
-	addr += tmp;
-	len -= tmp;
-	tmp = PAGE_SIZE;
-	for (;;)
-	  {
-	    if ((paddr = virt_to_phys_060(addr)))
-	      break;
-	    if (len <= tmp)
-	      return 0;
-	    addr += tmp;
-	    len -= tmp;
-	  }
-      }
-      len = (len + 15) >> 4;
-      i = (PAGE_SIZE - (paddr & ~PAGE_MASK)) >> 4;
-      while (len--)
-	{
-	  switch (cache)
-	    {
-	    case FLUSH_CACHE_DATA:
-	      __asm__ __volatile__ (".chip 68060\n\t"
-				    "cpushl %%dc,(%0)\n\t"
-				    ".chip 68k"
-				    : : "a" (paddr));
-	      break;
-	    case FLUSH_CACHE_INSN:
-	      __asm__ __volatile__ (".chip 68060\n\t"
-				    "cpushl %%ic,(%0)\n\t"
-				    ".chip 68k"
-				    : : "a" (paddr));
-	      break;
-	    default:
-	    case FLUSH_CACHE_BOTH:
-	      __asm__ __volatile__ (".chip 68060\n\t"
-				    "cpushl %%bc,(%0)\n\t"
-				    ".chip 68k"
-				    : : "a" (paddr));
-	      break;
-	    }
-	  if (!--i && len)
-	    {
-
-	      /*
-	       * We just want to jump to the first cache line
-	       * in the next page.
-	       */
-	      addr += PAGE_SIZE;
-	      addr &= PAGE_MASK;
-
-	      i = PAGE_SIZE / 16;
-	      /* Recompute physical address when crossing a page
-	         boundary. */
-	      for (;;)
-	        {
-	          if ((paddr = virt_to_phys_060(addr)))
-	            break;
-	          if (len <= i)
-	            return 0;
-	          len -= i;
-	          addr += PAGE_SIZE;
-	        }
-	    }
-	  else
-	    paddr += 16;
-	}
-      break;
-
-    default:
-    case FLUSH_SCOPE_PAGE:
-      len += (addr & ~PAGE_MASK) + (PAGE_SIZE - 1);
-      addr &= PAGE_MASK;	/* Workaround for bug in some
-				   revisions of the 68060 */
-      for (len >>= PAGE_SHIFT; len--; addr += PAGE_SIZE)
-	{
-	  if (!(paddr = virt_to_phys_060(addr)))
-	    continue;
-	  switch (cache)
-	    {
-	    case FLUSH_CACHE_DATA:
-	      __asm__ __volatile__ (".chip 68060\n\t"
-				    "cpushp %%dc,(%0)\n\t"
-				    ".chip 68k"
-				    : : "a" (paddr));
-	      break;
-	    case FLUSH_CACHE_INSN:
-	      __asm__ __volatile__ (".chip 68060\n\t"
-				    "cpushp %%ic,(%0)\n\t"
-				    ".chip 68k"
-				    : : "a" (paddr));
-	      break;
-	    default:
-	    case FLUSH_CACHE_BOTH:
-	      __asm__ __volatile__ (".chip 68060\n\t"
-				    "cpushp %%bc,(%0)\n\t"
-				    ".chip 68k"
-				    : : "a" (paddr));
-	      break;
-	    }
-	}
-      break;
-    }
-  return 0;
-}
-
-/* sys_cacheflush -- flush (part of) the processor cache.  */
-asmlinkage int
-sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
-{
-	struct vm_area_struct *vma;
-	int ret = -EINVAL;
-
-	if (scope < FLUSH_SCOPE_LINE || scope > FLUSH_SCOPE_ALL ||
-	    cache & ~FLUSH_CACHE_BOTH)
-		goto out;
-
-	if (scope == FLUSH_SCOPE_ALL) {
-		/* Only the superuser may explicitly flush the whole cache. */
-		ret = -EPERM;
-		if (!capable(CAP_SYS_ADMIN))
-			goto out;
-	} else {
-		/*
-		 * Verify that the specified address region actually belongs
-		 * to this process.
-		 */
-		vma = find_vma (current->mm, addr);
-		ret = -EINVAL;
-		/* Check for overflow.  */
-		if (addr + len < addr)
-			goto out;
-		if (vma == NULL || addr < vma->vm_start || addr + len > vma->vm_end)
-			goto out;
-	}
-
-	if (CPU_IS_020_OR_030) {
-		if (scope == FLUSH_SCOPE_LINE && len < 256) {
-			unsigned long cacr;
-			__asm__ ("movec %%cacr, %0" : "=r" (cacr));
-			if (cache & FLUSH_CACHE_INSN)
-				cacr |= 4;
-			if (cache & FLUSH_CACHE_DATA)
-				cacr |= 0x400;
-			len >>= 2;
-			while (len--) {
-				__asm__ __volatile__ ("movec %1, %%caar\n\t"
-						      "movec %0, %%cacr"
-						      : /* no outputs */
-						      : "r" (cacr), "r" (addr));
-				addr += 4;
-			}
-		} else {
-			/* Flush the whole cache, even if page granularity requested. */
-			unsigned long cacr;
-			__asm__ ("movec %%cacr, %0" : "=r" (cacr));
-			if (cache & FLUSH_CACHE_INSN)
-				cacr |= 8;
-			if (cache & FLUSH_CACHE_DATA)
-				cacr |= 0x800;
-			__asm__ __volatile__ ("movec %0, %%cacr" : : "r" (cacr));
-		}
-		ret = 0;
-		goto out;
-	} else {
-	    /*
-	     * 040 or 060: don't blindly trust 'scope', someone could
-	     * try to flush a few megs of memory.
-	     */
-
-	    if (len>=3*PAGE_SIZE && scope<FLUSH_SCOPE_PAGE)
-	        scope=FLUSH_SCOPE_PAGE;
-	    if (len>=10*PAGE_SIZE && scope<FLUSH_SCOPE_ALL)
-	        scope=FLUSH_SCOPE_ALL;
-	    if (CPU_IS_040) {
-		ret = cache_flush_040 (addr, scope, cache, len);
-	    } else if (CPU_IS_060) {
-		ret = cache_flush_060 (addr, scope, cache, len);
-	    }
-	}
-out:
-	return ret;
-}
-
-asmlinkage int sys_getpagesize(void)
-{
-	return PAGE_SIZE;
-}
-
-/*
- * Do a system call from kernel instead of calling sys_execve so we
- * end up with proper pt_regs.
- */
-int kernel_execve(const char *filename,
-		  const char *const argv[],
-		  const char *const envp[])
-{
-	register long __res asm ("%d0") = __NR_execve;
-	register long __a asm ("%d1") = (long)(filename);
-	register long __b asm ("%d2") = (long)(argv);
-	register long __c asm ("%d3") = (long)(envp);
-	asm volatile ("trap  #0" : "+d" (__res)
-			: "d" (__a), "d" (__b), "d" (__c));
-	return __res;
-}
-
-asmlinkage unsigned long sys_get_thread_area(void)
-{
-	return current_thread_info()->tp_value;
-}
-
-asmlinkage int sys_set_thread_area(unsigned long tp)
-{
-	current_thread_info()->tp_value = tp;
-	return 0;
-}
-
-/* This syscall gets its arguments in A0 (mem), D2 (oldval) and
-   D1 (newval).  */
-asmlinkage int
-sys_atomic_cmpxchg_32(unsigned long newval, int oldval, int d3, int d4, int d5,
-		      unsigned long __user * mem)
-{
-	/* This was borrowed from ARM's implementation.  */
-	for (;;) {
-		struct mm_struct *mm = current->mm;
-		pgd_t *pgd;
-		pmd_t *pmd;
-		pte_t *pte;
-		spinlock_t *ptl;
-		unsigned long mem_value;
-
-		down_read(&mm->mmap_sem);
-		pgd = pgd_offset(mm, (unsigned long)mem);
-		if (!pgd_present(*pgd))
-			goto bad_access;
-		pmd = pmd_offset(pgd, (unsigned long)mem);
-		if (!pmd_present(*pmd))
-			goto bad_access;
-		pte = pte_offset_map_lock(mm, pmd, (unsigned long)mem, &ptl);
-		if (!pte_present(*pte) || !pte_dirty(*pte)
-		    || !pte_write(*pte)) {
-			pte_unmap_unlock(pte, ptl);
-			goto bad_access;
-		}
-
-		mem_value = *mem;
-		if (mem_value == oldval)
-			*mem = newval;
-
-		pte_unmap_unlock(pte, ptl);
-		up_read(&mm->mmap_sem);
-		return mem_value;
-
-	      bad_access:
-		up_read(&mm->mmap_sem);
-		/* This is not necessarily a bad access, we can get here if
-		   a memory we're trying to write to should be copied-on-write.
-		   Make the kernel do the necessary page stuff, then re-iterate.
-		   Simulate a write access fault to do that.  */
-		{
-			/* The first argument of the function corresponds to
-			   D1, which is the first field of struct pt_regs.  */
-			struct pt_regs *fp = (struct pt_regs *)&newval;
-
-			/* '3' is an RMW flag.  */
-			if (do_page_fault(fp, (unsigned long)mem, 3))
-				/* If the do_page_fault() failed, we don't
-				   have anything meaningful to return.
-				   There should be a SIGSEGV pending for
-				   the process.  */
-				return 0xdeadbeef;
-		}
-	}
-}
-
-asmlinkage int sys_atomic_barrier(void)
-{
-	/* no code needed for uniprocs */
-	return 0;
-}
+#ifdef CONFIG_MMU
+#include "sys_m68k_mm.c"
+#else
+#include "sys_m68k_no.c"
+#endif

arch/m68k/kernel/sys_m68k_mm.c

···
+/*
+ * linux/arch/m68k/kernel/sys_m68k.c
+ *
+ * This file contains various random system calls that
+ * have a non-standard calling sequence on the Linux/m68k
+ * platform.
+ */
+
+#include <linux/capability.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/smp.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/stat.h>
+#include <linux/syscalls.h>
+#include <linux/mman.h>
+#include <linux/file.h>
+#include <linux/ipc.h>
+
+#include <asm/setup.h>
+#include <asm/uaccess.h>
+#include <asm/cachectl.h>
+#include <asm/traps.h>
+#include <asm/page.h>
+#include <asm/unistd.h>
+#include <linux/elf.h>
+#include <asm/tlb.h>
+
+asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address,
+			     unsigned long error_code);
+
+asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
+	unsigned long prot, unsigned long flags,
+	unsigned long fd, unsigned long pgoff)
+{
+	/*
+	 * This is wrong for sun3 - there PAGE_SIZE is 8Kb,
+	 * so we need to shift the argument down by 1; m68k mmap64(3)
+	 * (in libc) expects the last argument of mmap2 in 4Kb units.
+	 */
+	return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff);
+}
+
+/* Convert virtual (user) address VADDR to physical address PADDR */
+#define virt_to_phys_040(vaddr)						\
+({									\
+  unsigned long _mmusr, _paddr;						\
+									\
+  __asm__ __volatile__ (".chip 68040\n\t"				\
+			"ptestr (%1)\n\t"				\
+			"movec %%mmusr,%0\n\t"				\
+			".chip 68k"					\
+			: "=r" (_mmusr)					\
+			: "a" (vaddr));					\
+  _paddr = (_mmusr & MMU_R_040) ? (_mmusr & PAGE_MASK) : 0;		\
+  _paddr;								\
+})
+
+static inline int
+cache_flush_040 (unsigned long addr, int scope, int cache, unsigned long len)
+{
+  unsigned long paddr, i;
+
+  switch (scope)
+    {
+    case FLUSH_SCOPE_ALL:
+      switch (cache)
+	{
+	case FLUSH_CACHE_DATA:
+	  /* This nop is needed for some broken versions of the 68040.  */
+	  __asm__ __volatile__ ("nop\n\t"
+				".chip 68040\n\t"
+				"cpusha %dc\n\t"
+				".chip 68k");
+	  break;
+	case FLUSH_CACHE_INSN:
+	  __asm__ __volatile__ ("nop\n\t"
+				".chip 68040\n\t"
+				"cpusha %ic\n\t"
+				".chip 68k");
+	  break;
+	default:
+	case FLUSH_CACHE_BOTH:
+	  __asm__ __volatile__ ("nop\n\t"
+				".chip 68040\n\t"
+				"cpusha %bc\n\t"
+				".chip 68k");
+	  break;
+	}
+      break;
+
+    case FLUSH_SCOPE_LINE:
+      /* Find the physical address of the first mapped page in the
+	 address range.  */
+      if ((paddr = virt_to_phys_040(addr))) {
+        paddr += addr & ~(PAGE_MASK | 15);
+        len = (len + (addr & 15) + 15) >> 4;
+      } else {
+	unsigned long tmp = PAGE_SIZE - (addr & ~PAGE_MASK);
+
+	if (len <= tmp)
+	  return 0;
+	addr += tmp;
+	len -= tmp;
+	tmp = PAGE_SIZE;
+	for (;;)
+	  {
+	    if ((paddr = virt_to_phys_040(addr)))
+	      break;
+	    if (len <= tmp)
+	      return 0;
+	    addr += tmp;
+	    len -= tmp;
+	  }
+	len = (len + 15) >> 4;
+      }
+      i = (PAGE_SIZE - (paddr & ~PAGE_MASK)) >> 4;
+      while (len--)
+	{
+	  switch (cache)
+	    {
+	    case FLUSH_CACHE_DATA:
+	      __asm__ __volatile__ ("nop\n\t"
+				    ".chip 68040\n\t"
+				    "cpushl %%dc,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    case FLUSH_CACHE_INSN:
+	      __asm__ __volatile__ ("nop\n\t"
+				    ".chip 68040\n\t"
+				    "cpushl %%ic,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    default:
+	    case FLUSH_CACHE_BOTH:
+	      __asm__ __volatile__ ("nop\n\t"
+				    ".chip 68040\n\t"
+				    "cpushl %%bc,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    }
+	  if (!--i && len)
+	    {
+	      /*
+	       * No need to page align here since it is done by
+	       * virt_to_phys_040().
+	       */
+	      addr += PAGE_SIZE;
+	      i = PAGE_SIZE / 16;
+	      /* Recompute physical address when crossing a page
+	         boundary. */
+	      for (;;)
+		{
+		  if ((paddr = virt_to_phys_040(addr)))
+		    break;
+		  if (len <= i)
+		    return 0;
+		  len -= i;
+		  addr += PAGE_SIZE;
+		}
+	    }
+	  else
+	    paddr += 16;
+	}
+      break;
+
+    default:
+    case FLUSH_SCOPE_PAGE:
+      len += (addr & ~PAGE_MASK) + (PAGE_SIZE - 1);
+      for (len >>= PAGE_SHIFT; len--; addr += PAGE_SIZE)
+	{
+	  if (!(paddr = virt_to_phys_040(addr)))
+	    continue;
+	  switch (cache)
+	    {
+	    case FLUSH_CACHE_DATA:
+	      __asm__ __volatile__ ("nop\n\t"
+				    ".chip 68040\n\t"
+				    "cpushp %%dc,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    case FLUSH_CACHE_INSN:
+	      __asm__ __volatile__ ("nop\n\t"
+				    ".chip 68040\n\t"
+				    "cpushp %%ic,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    default:
+	    case FLUSH_CACHE_BOTH:
+	      __asm__ __volatile__ ("nop\n\t"
+				    ".chip 68040\n\t"
+				    "cpushp %%bc,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    }
+	}
+      break;
+    }
+  return 0;
+}
+
+#define virt_to_phys_060(vaddr)				\
+({							\
+  unsigned long paddr;					\
+  __asm__ __volatile__ (".chip 68060\n\t"		\
+			"plpar (%0)\n\t"		\
+			".chip 68k"			\
+			: "=a" (paddr)			\
+			: "0" (vaddr));			\
+  (paddr); /* XXX */					\
+})
+
+static inline int
+cache_flush_060 (unsigned long addr, int scope, int cache, unsigned long len)
+{
+  unsigned long paddr, i;
+
+  /*
+   * 68060 manual says:
+   *  cpush %dc : flush DC, remains valid (with our %cacr setup)
+   *  cpush %ic : invalidate IC
+   *  cpush %bc : flush DC + invalidate IC
+   */
+  switch (scope)
+    {
+    case FLUSH_SCOPE_ALL:
+      switch (cache)
+	{
+	case FLUSH_CACHE_DATA:
+	  __asm__ __volatile__ (".chip 68060\n\t"
+				"cpusha %dc\n\t"
+				".chip 68k");
+	  break;
+	case FLUSH_CACHE_INSN:
+	  __asm__ __volatile__ (".chip 68060\n\t"
+				"cpusha %ic\n\t"
+				".chip 68k");
+	  break;
+	default:
+	case FLUSH_CACHE_BOTH:
+	  __asm__ __volatile__ (".chip 68060\n\t"
+				"cpusha %bc\n\t"
+				".chip 68k");
+	  break;
+	}
+      break;
+
+    case FLUSH_SCOPE_LINE:
+      /* Find the physical address of the first mapped page in the
+	 address range.  */
+      len += addr & 15;
+      addr &= -16;
+      if (!(paddr = virt_to_phys_060(addr))) {
+	unsigned long tmp = PAGE_SIZE - (addr & ~PAGE_MASK);
+
+	if (len <= tmp)
+	  return 0;
+	addr += tmp;
+	len -= tmp;
+	tmp = PAGE_SIZE;
+	for (;;)
+	  {
+	    if ((paddr = virt_to_phys_060(addr)))
+	      break;
+	    if (len <= tmp)
+	      return 0;
+	    addr += tmp;
+	    len -= tmp;
+	  }
+      }
+      len = (len + 15) >> 4;
+      i = (PAGE_SIZE - (paddr & ~PAGE_MASK)) >> 4;
+      while (len--)
+	{
+	  switch (cache)
+	    {
+	    case FLUSH_CACHE_DATA:
+	      __asm__ __volatile__ (".chip 68060\n\t"
+				    "cpushl %%dc,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    case FLUSH_CACHE_INSN:
+	      __asm__ __volatile__ (".chip 68060\n\t"
+				    "cpushl %%ic,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    default:
+	    case FLUSH_CACHE_BOTH:
+	      __asm__ __volatile__ (".chip 68060\n\t"
+				    "cpushl %%bc,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    }
+	  if (!--i && len)
+	    {
+
+	      /*
+	       * We just want to jump to the first cache line
+	       * in the next page.
+	       */
+	      addr += PAGE_SIZE;
+	      addr &= PAGE_MASK;
+
+	      i = PAGE_SIZE / 16;
+	      /* Recompute physical address when crossing a page
+	         boundary. */
+	      for (;;)
+	        {
+	          if ((paddr = virt_to_phys_060(addr)))
+	            break;
+	          if (len <= i)
+	            return 0;
+	          len -= i;
+	          addr += PAGE_SIZE;
+	        }
+	    }
+	  else
+	    paddr += 16;
+	}
+      break;
+
+    default:
+    case FLUSH_SCOPE_PAGE:
+      len += (addr & ~PAGE_MASK) + (PAGE_SIZE - 1);
+      addr &= PAGE_MASK;	/* Workaround for bug in some
+				   revisions of the 68060 */
+      for (len >>= PAGE_SHIFT; len--; addr += PAGE_SIZE)
+	{
+	  if (!(paddr = virt_to_phys_060(addr)))
+	    continue;
+	  switch (cache)
+	    {
+	    case FLUSH_CACHE_DATA:
+	      __asm__ __volatile__ (".chip 68060\n\t"
+				    "cpushp %%dc,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    case FLUSH_CACHE_INSN:
+	      __asm__ __volatile__ (".chip 68060\n\t"
+				    "cpushp %%ic,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    default:
+	    case FLUSH_CACHE_BOTH:
+	      __asm__ __volatile__ (".chip 68060\n\t"
+				    "cpushp %%bc,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    }
+	}
+      break;
+    }
+  return 0;
+}
+
+/* sys_cacheflush -- flush (part of) the processor cache.  */
+asmlinkage int
+sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
+{
+	struct vm_area_struct *vma;
+	int ret = -EINVAL;
+
+	if (scope < FLUSH_SCOPE_LINE || scope > FLUSH_SCOPE_ALL ||
+	    cache & ~FLUSH_CACHE_BOTH)
+		goto out;
+
+	if (scope == FLUSH_SCOPE_ALL) {
+		/* Only the superuser may explicitly flush the whole cache. */
+		ret = -EPERM;
+		if (!capable(CAP_SYS_ADMIN))
+			goto out;
+	} else {
+		/*
+		 * Verify that the specified address region actually belongs
+		 * to this process.
+		 */
+		vma = find_vma (current->mm, addr);
+		ret = -EINVAL;
+		/* Check for overflow.  */
+		if (addr + len < addr)
+			goto out;
+		if (vma == NULL || addr < vma->vm_start || addr + len > vma->vm_end)
+			goto out;
+	}
+
+	if (CPU_IS_020_OR_030) {
+		if (scope == FLUSH_SCOPE_LINE && len < 256) {
+			unsigned long cacr;
+			__asm__ ("movec %%cacr, %0" : "=r" (cacr));
+			if (cache & FLUSH_CACHE_INSN)
+				cacr |= 4;
+			if (cache & FLUSH_CACHE_DATA)
+				cacr |= 0x400;
+			len >>= 2;
+			while (len--) {
+				__asm__ __volatile__ ("movec %1, %%caar\n\t"
+						      "movec %0, %%cacr"
+						      : /* no outputs */
+						      : "r" (cacr), "r" (addr));
+				addr += 4;
+			}
+		} else {
+			/* Flush the whole cache, even if page granularity requested. */
+			unsigned long cacr;
+			__asm__ ("movec %%cacr, %0" : "=r" (cacr));
+			if (cache & FLUSH_CACHE_INSN)
+				cacr |= 8;
+			if (cache & FLUSH_CACHE_DATA)
+				cacr |= 0x800;
+			__asm__ __volatile__ ("movec %0, %%cacr" : : "r" (cacr));
+		}
+		ret = 0;
+		goto out;
+	} else {
+	    /*
+	     * 040 or 060: don't blindly trust 'scope', someone could
+	     * try to flush a few megs of memory.
+	     */
+
+	    if (len>=3*PAGE_SIZE && scope<FLUSH_SCOPE_PAGE)
+	        scope=FLUSH_SCOPE_PAGE;
+	    if (len>=10*PAGE_SIZE && scope<FLUSH_SCOPE_ALL)
+	        scope=FLUSH_SCOPE_ALL;
+	    if (CPU_IS_040) {
+		ret = cache_flush_040 (addr, scope, cache, len);
+	    } else if (CPU_IS_060) {
+		ret = cache_flush_060 (addr, scope, cache, len);
+	    }
+	}
+out:
+	return ret;
+}
+
+asmlinkage int sys_getpagesize(void)
+{
+	return PAGE_SIZE;
+}
+
+/*
+ * Do a system call from kernel instead of calling sys_execve so we
+ * end up with proper pt_regs.
+ */
+int kernel_execve(const char *filename,
+		  const char *const argv[],
+		  const char *const envp[])
+{
+	register long __res asm ("%d0") = __NR_execve;
+	register long __a asm ("%d1") = (long)(filename);
+	register long __b asm ("%d2") = (long)(argv);
+	register long __c asm ("%d3") = (long)(envp);
+	asm volatile ("trap  #0" : "+d" (__res)
+			: "d" (__a), "d" (__b), "d" (__c));
+	return __res;
+}
+
+asmlinkage unsigned long sys_get_thread_area(void)
+{
+	return current_thread_info()->tp_value;
+}
+
+asmlinkage int sys_set_thread_area(unsigned long tp)
+{
+	current_thread_info()->tp_value = tp;
+	return 0;
+}
+
+/* This syscall gets its arguments in A0 (mem), D2 (oldval) and
+   D1 (newval).  */
+asmlinkage int
+sys_atomic_cmpxchg_32(unsigned long newval, int oldval, int d3, int d4, int d5,
+		      unsigned long __user * mem)
+{
+	/* This was borrowed from ARM's implementation.  */
+	for (;;) {
+		struct mm_struct *mm = current->mm;
+		pgd_t *pgd;
+		pmd_t *pmd;
+		pte_t *pte;
+		spinlock_t *ptl;
+		unsigned long mem_value;
+
+		down_read(&mm->mmap_sem);
+		pgd = pgd_offset(mm, (unsigned long)mem);
+		if (!pgd_present(*pgd))
+			goto bad_access;
+		pmd = pmd_offset(pgd, (unsigned long)mem);
+		if (!pmd_present(*pmd))
+			goto bad_access;
+		pte = pte_offset_map_lock(mm, pmd, (unsigned long)mem, &ptl);
+		if (!pte_present(*pte) || !pte_dirty(*pte)
+		    || !pte_write(*pte)) {
+			pte_unmap_unlock(pte, ptl);
+			goto bad_access;
+		}
+
+		mem_value = *mem;
+		if (mem_value == oldval)
+			*mem = newval;
+
+		pte_unmap_unlock(pte, ptl);
+		up_read(&mm->mmap_sem);
+		return mem_value;
+
+	      bad_access:
+		up_read(&mm->mmap_sem);
+		/* This is not necessarily a bad access, we can get here if
+		   a memory we're trying to write to should be copied-on-write.
+		   Make the kernel do the necessary page stuff, then re-iterate.
+		   Simulate a write access fault to do that.  */
+		{
+			/* The first argument of the function corresponds to
+			   D1, which is the first field of struct pt_regs.  */
+			struct pt_regs *fp = (struct pt_regs *)&newval;
+
+			/* '3' is an RMW flag.  */
+			if (do_page_fault(fp, (unsigned long)mem, 3))
+				/* If the do_page_fault() failed, we don't
+				   have anything meaningful to return.
+				   There should be a SIGSEGV pending for
+				   the process.  */
+				return 0xdeadbeef;
+		}
+	}
+}
+
+asmlinkage int sys_atomic_barrier(void)
+{
+	/* no code needed for uniprocs */
+	return 0;
+}

arch/m68k/kernel/time.c

···
-/*
- *  linux/arch/m68k/kernel/time.c
- *
- *  Copyright (C) 1991, 1992, 1995  Linus Torvalds
- *
- * This file contains the m68k-specific time handling details.
- * Most of the stuff is located in the machine specific files.
- *
- * 1997-09-10	Updated NTP code according to technical memorandum Jan '96
- *		"A Kernel Model for Precision Timekeeping" by Dave Mills
- */
-
-#include <linux/errno.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/param.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/rtc.h>
-#include <linux/platform_device.h>
-
-#include <asm/machdep.h>
-#include <asm/io.h>
-#include <asm/irq_regs.h>
-
-#include <linux/time.h>
-#include <linux/timex.h>
-#include <linux/profile.h>
-
-static inline int set_rtc_mmss(unsigned long nowtime)
-{
-  if (mach_set_clock_mmss)
-    return mach_set_clock_mmss (nowtime);
-  return -1;
-}
-
-/*
- * timer_interrupt() needs to keep up the real-time clock,
- * as well as call the "xtime_update()" routine every clocktick
- */
-static irqreturn_t timer_interrupt(int irq, void *dummy)
-{
-	xtime_update(1);
-	update_process_times(user_mode(get_irq_regs()));
-	profile_tick(CPU_PROFILING);
-
-#ifdef CONFIG_HEARTBEAT
-	/* use power LED as a heartbeat instead -- much more useful
-	   for debugging -- based on the version for PReP by Cort */
-	/* acts like an actual heart beat -- ie thump-thump-pause... */
-	if (mach_heartbeat) {
-	    static unsigned cnt = 0, period = 0, dist = 0;
-
-	    if (cnt == 0 || cnt == dist)
-		mach_heartbeat( 1 );
-	    else if (cnt == 7 || cnt == dist+7)
-		mach_heartbeat( 0 );
-
-	    if (++cnt > period) {
-		cnt = 0;
-		/* The hyperbolic function below modifies the heartbeat period
-		 * length in dependency of the current (5min) load. It goes
-		 * through the points f(0)=126, f(1)=86, f(5)=51,
-		 * f(inf)->30. */
-		period = ((672<<FSHIFT)/(5*avenrun[0]+(7<<FSHIFT))) + 30;
-		dist = period / 4;
-	    }
-	}
-#endif /* CONFIG_HEARTBEAT */
-	return IRQ_HANDLED;
-}
-
-void read_persistent_clock(struct timespec *ts)
-{
-	struct rtc_time time;
-	ts->tv_sec = 0;
-	ts->tv_nsec = 0;
-
-	if (mach_hwclk) {
-		mach_hwclk(0, &time);
-
-		if ((time.tm_year += 1900) < 1970)
-			time.tm_year += 100;
-		ts->tv_sec = mktime(time.tm_year, time.tm_mon, time.tm_mday,
-				      time.tm_hour, time.tm_min, time.tm_sec);
-	}
-}
-
-void __init time_init(void)
-{
-	mach_sched_init(timer_interrupt);
-}
-
-u32 arch_gettimeoffset(void)
-{
-	return mach_gettimeoffset() * 1000;
-}
-
-static int __init rtc_init(void)
-{
-	struct platform_device *pdev;
-
-	if (!mach_hwclk)
-		return -ENODEV;
-
-	pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0);
-	if (IS_ERR(pdev))
-		return PTR_ERR(pdev);
-
-	return 0;
-}
-
-module_init(rtc_init);
+#ifdef CONFIG_MMU
+#include "time_mm.c"
+#else
+#include "time_no.c"
+#endif

arch/m68k/kernel/time_mm.c

···
+/*
+ *  linux/arch/m68k/kernel/time.c
+ *
+ *  Copyright (C) 1991, 1992, 1995  Linus Torvalds
+ *
+ * This file contains the m68k-specific time handling details.
+ * Most of the stuff is located in the machine specific files.
+ *
+ * 1997-09-10	Updated NTP code according to technical memorandum Jan '96
+ *		"A Kernel Model for Precision Timekeeping" by Dave Mills
+ */
+
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/param.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/rtc.h>
+#include <linux/platform_device.h>
+
+#include <asm/machdep.h>
+#include <asm/io.h>
+#include <asm/irq_regs.h>
+
+#include <linux/time.h>
+#include <linux/timex.h>
+#include <linux/profile.h>
+
+static inline int set_rtc_mmss(unsigned long nowtime)
+{
+  if (mach_set_clock_mmss)
+    return mach_set_clock_mmss (nowtime);
+  return -1;
+}
+
+/*
+ * timer_interrupt() needs to keep up the real-time clock,
+ * as well as call the "xtime_update()" routine every clocktick
+ */
+static irqreturn_t timer_interrupt(int irq, void *dummy)
+{
+	xtime_update(1);
+	update_process_times(user_mode(get_irq_regs()));
+	profile_tick(CPU_PROFILING);
+
+#ifdef CONFIG_HEARTBEAT
+	/* use power LED as a heartbeat instead -- much more useful
+	   for debugging -- based on the version for PReP by Cort */
+	/* acts like an actual heart beat -- ie thump-thump-pause... */
+	if (mach_heartbeat) {
+	    static unsigned cnt = 0, period = 0, dist = 0;
+
+	    if (cnt == 0 || cnt == dist)
+		mach_heartbeat( 1 );
+	    else if (cnt == 7 || cnt == dist+7)
+		mach_heartbeat( 0 );
+
+	    if (++cnt > period) {
+		cnt = 0;
+		/* The hyperbolic function below modifies the heartbeat period
+		 * length in dependency of the current (5min) load. It goes
+		 * through the points f(0)=126, f(1)=86, f(5)=51,
+		 * f(inf)->30. */
+		period = ((672<<FSHIFT)/(5*avenrun[0]+(7<<FSHIFT))) + 30;
+		dist = period / 4;
+	    }
+	}
+#endif /* CONFIG_HEARTBEAT */
+	return IRQ_HANDLED;
+}
+
+void read_persistent_clock(struct timespec *ts)
+{
+	struct rtc_time time;
+	ts->tv_sec = 0;
+	ts->tv_nsec = 0;
+
+	if (mach_hwclk) {
+		mach_hwclk(0, &time);
+
+		if ((time.tm_year += 1900) < 1970)
+			time.tm_year += 100;
+		ts->tv_sec = mktime(time.tm_year, time.tm_mon, time.tm_mday,
+				      time.tm_hour, time.tm_min, time.tm_sec);
+	}
+}
+
+void __init time_init(void)
+{
+	mach_sched_init(timer_interrupt);
+}
+
+u32 arch_gettimeoffset(void)
+{
+	return mach_gettimeoffset() * 1000;
+}
+
+static int __init rtc_init(void)
+{
+	struct platform_device *pdev;
+
+	if (!mach_hwclk)
+		return -ENODEV;
+
+	pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0);
+	if (IS_ERR(pdev))
+		return PTR_ERR(pdev);
+
+	return 0;
+}
+
+module_init(rtc_init);

arch/m68k/kernel/traps.c

···
-/*
- *  linux/arch/m68k/kernel/traps.c
- *
- *  Copyright (C) 1993, 1994 by Hamish Macdonald
- *
- *  68040 fixes by Michael Rausch
- *  68040 fixes by Martin Apel
- *  68040 fixes and writeback by Richard Zidlicky
- *  68060 fixes by Roman Hodek
- *  68060 fixes by Jesper Skov
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file COPYING in the main directory of this archive
- * for more details.
- */
-
-/*
- * Sets up all exception vectors
- */
-
-#include <linux/sched.h>
-#include <linux/signal.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/module.h>
-#include <linux/user.h>
-#include <linux/string.h>
-#include <linux/linkage.h>
-#include <linux/init.h>
-#include <linux/ptrace.h>
-#include <linux/kallsyms.h>
-
-#include <asm/setup.h>
-#include <asm/fpu.h>
-#include <asm/system.h>
-#include <asm/uaccess.h>
-#include <asm/traps.h>
-#include <asm/pgalloc.h>
-#include <asm/machdep.h>
-#include <asm/siginfo.h>
-
-/* assembler routines */
-asmlinkage void system_call(void);
-asmlinkage void buserr(void);
-asmlinkage void trap(void);
-asmlinkage void nmihandler(void);
-#ifdef CONFIG_M68KFPU_EMU
-asmlinkage void fpu_emu(void);
-#endif
-
-e_vector vectors[256];
-
-/* nmi handler for the Amiga */
-asm(".text\n"
-    __ALIGN_STR "\n"
-    "nmihandler: rte");
-
-/*
- * this must be called very early as the kernel might
- * use some instruction that are emulated on the 060
- * and so we're prepared for early probe attempts (e.g. nf_init).
- */
-void __init base_trap_init(void)
-{
-	if (MACH_IS_SUN3X) {
-		extern e_vector *sun3x_prom_vbr;
-
-		__asm__ volatile ("movec %%vbr, %0" : "=r" (sun3x_prom_vbr));
-	}
-
-	/* setup the exception vector table */
-	__asm__ volatile ("movec %0,%%vbr" : : "r" ((void*)vectors));
-
-	if (CPU_IS_060) {
-		/* set up ISP entry points */
-		asmlinkage void unimp_vec(void) asm ("_060_isp_unimp");
-
-		vectors[VEC_UNIMPII] = unimp_vec;
-	}
-
-	vectors[VEC_BUSERR] = buserr;
-	vectors[VEC_ILLEGAL] = trap;
-	vectors[VEC_SYS] = system_call;
-}
-
-void __init trap_init (void)
-{
-	int i;
-
-	for (i = VEC_SPUR; i <= VEC_INT7; i++)
-		vectors[i] = bad_inthandler;
-
-	for (i = 0; i < VEC_USER; i++)
-		if (!vectors[i])
-			vectors[i] = trap;
-
-	for (i = VEC_USER; i < 256; i++)
-		vectors[i] = bad_inthandler;
-
-#ifdef CONFIG_M68KFPU_EMU
-	if (FPU_IS_EMU)
-		vectors[VEC_LINE11] = fpu_emu;
-#endif
-
-	if (CPU_IS_040 && !FPU_IS_EMU) {
-		/* set up FPSP entry points */
-		asmlinkage void dz_vec(void) asm ("dz");
-		asmlinkage void inex_vec(void) asm ("inex");
-		asmlinkage void ovfl_vec(void) asm ("ovfl");
-		asmlinkage void unfl_vec(void) asm ("unfl");
-		asmlinkage void snan_vec(void) asm ("snan");
-		asmlinkage void operr_vec(void) asm ("operr");
-		asmlinkage void bsun_vec(void) asm ("bsun");
-		asmlinkage void fline_vec(void) asm ("fline");
-		asmlinkage void unsupp_vec(void) asm ("unsupp");
-
-		vectors[VEC_FPDIVZ] = dz_vec;
-		vectors[VEC_FPIR] = inex_vec;
-		vectors[VEC_FPOVER] = ovfl_vec;
-		vectors[VEC_FPUNDER] = unfl_vec;
-		vectors[VEC_FPNAN] = snan_vec;
-		vectors[VEC_FPOE] = operr_vec;
-		vectors[VEC_FPBRUC] = bsun_vec;
-		vectors[VEC_LINE11] = fline_vec;
-		vectors[VEC_FPUNSUP] = unsupp_vec;
-	}
-
-	if (CPU_IS_060 && !FPU_IS_EMU) {
-		/* set up IFPSP entry points */
-		asmlinkage void snan_vec6(void) asm ("_060_fpsp_snan");
-		asmlinkage void operr_vec6(void) asm ("_060_fpsp_operr");
-		asmlinkage void ovfl_vec6(void) asm ("_060_fpsp_ovfl");
-		asmlinkage void unfl_vec6(void) asm ("_060_fpsp_unfl");
-		asmlinkage void dz_vec6(void) asm ("_060_fpsp_dz");
-		asmlinkage void inex_vec6(void) asm ("_060_fpsp_inex");
-		asmlinkage void fline_vec6(void) asm ("_060_fpsp_fline");
-		asmlinkage void unsupp_vec6(void) asm ("_060_fpsp_unsupp");
-		asmlinkage void effadd_vec6(void) asm ("_060_fpsp_effadd");
-
-		vectors[VEC_FPNAN] = snan_vec6;
-		vectors[VEC_FPOE] = operr_vec6;
-		vectors[VEC_FPOVER] = ovfl_vec6;
-		vectors[VEC_FPUNDER] = unfl_vec6;
-		vectors[VEC_FPDIVZ] = dz_vec6;
-		vectors[VEC_FPIR] = inex_vec6;
-		vectors[VEC_LINE11] = fline_vec6;
-		vectors[VEC_FPUNSUP] = unsupp_vec6;
-		vectors[VEC_UNIMPEA] = effadd_vec6;
-	}
-
-        /* if running on an amiga, make the NMI interrupt do nothing */
-	if (MACH_IS_AMIGA) {
-		vectors[VEC_INT7] = nmihandler;
-	}
-}
-
-
-static const char *vec_names[] = {
-	[VEC_RESETSP]	= "RESET SP",
-	[VEC_RESETPC]	= "RESET PC",
-	[VEC_BUSERR]	= "BUS ERROR",
-	[VEC_ADDRERR]	= "ADDRESS ERROR",
-	[VEC_ILLEGAL]	= "ILLEGAL INSTRUCTION",
-	[VEC_ZERODIV]	= "ZERO DIVIDE",
-	[VEC_CHK]	= "CHK",
-	[VEC_TRAP]	= "TRAPcc",
-	[VEC_PRIV]	= "PRIVILEGE VIOLATION",
-	[VEC_TRACE]	= "TRACE",
-	[VEC_LINE10]	= "LINE 1010",
-	[VEC_LINE11]	= "LINE 1111",
-	[VEC_RESV12]	= "UNASSIGNED RESERVED 12",
-	[VEC_COPROC]	= "COPROCESSOR PROTOCOL VIOLATION",
-	[VEC_FORMAT]	= "FORMAT ERROR",
-	[VEC_UNINT]	= "UNINITIALIZED INTERRUPT",
-	[VEC_RESV16]	= "UNASSIGNED RESERVED 16",
-	[VEC_RESV17]	= "UNASSIGNED RESERVED 17",
-	[VEC_RESV18]	= "UNASSIGNED RESERVED 18",
-	[VEC_RESV19]	= "UNASSIGNED RESERVED 19",
-	[VEC_RESV20]	= "UNASSIGNED RESERVED 20",
-	[VEC_RESV21]	= "UNASSIGNED RESERVED 21",
-	[VEC_RESV22]	= "UNASSIGNED RESERVED 22",
-	[VEC_RESV23]	= "UNASSIGNED RESERVED 23",
-	[VEC_SPUR]	= "SPURIOUS INTERRUPT",
-	[VEC_INT1]	= "LEVEL 1 INT",
-	[VEC_INT2]	= "LEVEL 2 INT",
-	[VEC_INT3]	= "LEVEL 3 INT",
-	[VEC_INT4]	= "LEVEL 4 INT",
-	[VEC_INT5]	= "LEVEL 5 INT",
-	[VEC_INT6]	= "LEVEL 6 INT",
-	[VEC_INT7]	= "LEVEL 7 INT",
-	[VEC_SYS]	= "SYSCALL",
-	[VEC_TRAP1]	= "TRAP #1",
-	[VEC_TRAP2]	= "TRAP #2",
-	[VEC_TRAP3]	= "TRAP #3",
-	[VEC_TRAP4]	= "TRAP #4",
-	[VEC_TRAP5]	= "TRAP #5",
-	[VEC_TRAP6]	= "TRAP #6",
-	[VEC_TRAP7]	= "TRAP #7",
-	[VEC_TRAP8]	= "TRAP #8",
-	[VEC_TRAP9]	= "TRAP #9",
-	[VEC_TRAP10]	= "TRAP #10",
-	[VEC_TRAP11]	= "TRAP #11",
-	[VEC_TRAP12]	= "TRAP #12",
-	[VEC_TRAP13]	= "TRAP #13",
-	[VEC_TRAP14]	= "TRAP #14",
-	[VEC_TRAP15]	= "TRAP #15",
-	[VEC_FPBRUC]	= "FPCP BSUN",
-	[VEC_FPIR]	= "FPCP INEXACT",
-	[VEC_FPDIVZ]	= "FPCP DIV BY 0",
-	[VEC_FPUNDER]	= "FPCP UNDERFLOW",
-	[VEC_FPOE]	= "FPCP OPERAND ERROR",
-	[VEC_FPOVER]	= "FPCP OVERFLOW",
-	[VEC_FPNAN]	= "FPCP SNAN",
-	[VEC_FPUNSUP]	= "FPCP UNSUPPORTED OPERATION",
-	[VEC_MMUCFG]	= "MMU CONFIGURATION ERROR",
-	[VEC_MMUILL]	= "MMU ILLEGAL OPERATION ERROR",
-	[VEC_MMUACC]	= "MMU ACCESS LEVEL VIOLATION ERROR",
-	[VEC_RESV59]	= "UNASSIGNED RESERVED 59",
-	[VEC_UNIMPEA]	= "UNASSIGNED RESERVED 60",
-	[VEC_UNIMPII]	= "UNASSIGNED RESERVED 61",
-	[VEC_RESV62]	= "UNASSIGNED RESERVED 62",
-	[VEC_RESV63]	= "UNASSIGNED RESERVED 63",
-};
-
-static const char *space_names[] = {
-	[0]		= "Space 0",
-	[USER_DATA]	= "User Data",
-	[USER_PROGRAM]	= "User Program",
-#ifndef CONFIG_SUN3
-	[3]		= "Space 3",
+#ifdef CONFIG_MMU
+#include "traps_mm.c"
 #else
-	[FC_CONTROL]	= "Control",
-#endif
-	[4]		= "Space 4",
-	[SUPER_DATA]	= "Super Data",
-	[SUPER_PROGRAM]	= "Super Program",
-	[CPU_SPACE]	= "CPU"
-};
-
-void die_if_kernel(char *,struct pt_regs *,int);
-asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address,
-                             unsigned long error_code);
-int send_fault_sig(struct pt_regs *regs);
-
-asmlinkage void trap_c(struct frame *fp);
-
-#if defined (CONFIG_M68060)
-static inline void access_error060 (struct frame *fp)
-{
-	unsigned long fslw = fp->un.fmt4.pc; /* is really FSLW for access error */
-
-#ifdef DEBUG
-	printk("fslw=%#lx, fa=%#lx\n", fslw, fp->un.fmt4.effaddr);
-#endif
-
-	if (fslw & MMU060_BPE) {
-		/* branch prediction error -> clear branch cache */
-		__asm__ __volatile__ ("movec %/cacr,%/d0\n\t"
-				      "orl   #0x00400000,%/d0\n\t"
-				      "movec %/d0,%/cacr"
-				      : : : "d0" );
-		/* return if there's no other error */
-		if (!(fslw & MMU060_ERR_BITS) && !(fslw & MMU060_SEE))
-			return;
-	}
-
-	if (fslw & (MMU060_DESC_ERR | MMU060_WP | MMU060_SP)) {
-		unsigned long errorcode;
-		unsigned long addr = fp->un.fmt4.effaddr;
-
-		if (fslw & MMU060_MA)
-			addr = (addr + PAGE_SIZE - 1) & PAGE_MASK;
-
-		errorcode = 1;
-		if (fslw & MMU060_DESC_ERR) {
-			__flush_tlb040_one(addr);
-			errorcode = 0;
-		}
-		if (fslw & MMU060_W)
-			errorcode |= 2;
-#ifdef DEBUG
-		printk("errorcode = %d\n", errorcode );
-#endif
-		do_page_fault(&fp->ptregs, addr, errorcode);
-	} else if (fslw & (MMU060_SEE)){
-		/* Software Emulation Error.
-		 * fault during mem_read/mem_write in ifpsp060/os.S
-		 */
-		send_fault_sig(&fp->ptregs);
-	} else if (!(fslw & (MMU060_RE|MMU060_WE)) ||
-		   send_fault_sig(&fp->ptregs) > 0) {
-		printk("pc=%#lx, fa=%#lx\n", fp->ptregs.pc, fp->un.fmt4.effaddr);
-		printk( "68060 access error, fslw=%lx\n", fslw );
-		trap_c( fp );
-	}
-}
-#endif /* CONFIG_M68060 */
-
-#if defined (CONFIG_M68040)
-static inline unsigned long probe040(int iswrite, unsigned long addr, int wbs)
-{
-	unsigned long mmusr;
-	mm_segment_t old_fs = get_fs();
-
-	set_fs(MAKE_MM_SEG(wbs));
-
-	if (iswrite)
-		asm volatile (".chip 68040; ptestw (%0); .chip 68k" : : "a" (addr));
-	else
-		asm volatile (".chip 68040; ptestr (%0); .chip 68k" : : "a" (addr));
-
-	asm volatile (".chip 68040; movec %%mmusr,%0; .chip 68k" : "=r" (mmusr));
-
-	set_fs(old_fs);
-
-	return mmusr;
-}
-
-static inline int do_040writeback1(unsigned short wbs, unsigned long wba,
-				   unsigned long wbd)
-{
-	int res = 0;
-	mm_segment_t old_fs = get_fs();
-
-	/* set_fs can not be moved, otherwise put_user() may oops */
-	set_fs(MAKE_MM_SEG(wbs));
-
-	switch (wbs & WBSIZ_040) {
-	case BA_SIZE_BYTE:
-		res = put_user(wbd & 0xff, (char __user *)wba);
-		break;
-	case BA_SIZE_WORD:
-		res = put_user(wbd & 0xffff, (short __user *)wba);
-		break;
-	case BA_SIZE_LONG:
-		res = put_user(wbd, (int __user *)wba);
-		break;
-	}
-
-	/* set_fs can not be moved, otherwise put_user() may oops */
-	set_fs(old_fs);
-
-
-#ifdef DEBUG
-	printk("do_040writeback1, res=%d\n",res);
-#endif
-
-	return res;
-}
-
-/* after an exception in a writeback the stack frame corresponding
- * to that exception is discarded, set a few bits in the old frame
- * to simulate what it should look like
- */
-static inline void fix_xframe040(struct frame *fp, unsigned long wba, unsigned short wbs)
-{
-	fp->un.fmt7.faddr = wba;
-	fp->un.fmt7.ssw = wbs & 0xff;
-	if (wba != current->thread.faddr)
-	    fp->un.fmt7.ssw |= MA_040;
-}
-
-static inline void do_040writebacks(struct frame *fp)
-{
-	int res = 0;
-#if 0
-	if (fp->un.fmt7.wb1s & WBV_040)
-		printk("access_error040: cannot handle 1st writeback. oops.\n");
-#endif
-
-	if ((fp->un.fmt7.wb2s & WBV_040) &&
-	    !(fp->un.fmt7.wb2s & WBTT_040)) {
-		res = do_040writeback1(fp->un.fmt7.wb2s, fp->un.fmt7.wb2a,
-				       fp->un.fmt7.wb2d);
-		if (res)
-			fix_xframe040(fp, fp->un.fmt7.wb2a, fp->un.fmt7.wb2s);
-		else
-			fp->un.fmt7.wb2s = 0;
-	}
-
-	/* do the 2nd wb only if the first one was successful (except for a kernel wb) */
-	if (fp->un.fmt7.wb3s & WBV_040 && (!res || fp->un.fmt7.wb3s & 4)) {
-		res = do_040writeback1(fp->un.fmt7.wb3s, fp->un.fmt7.wb3a,
-				       fp->un.fmt7.wb3d);
-		if (res)
-		    {
-			fix_xframe040(fp, fp->un.fmt7.wb3a, fp->un.fmt7.wb3s);
-
-			fp->un.fmt7.wb2s = fp->un.fmt7.wb3s;
-			fp->un.fmt7.wb3s &= (~WBV_040);
-			fp->un.fmt7.wb2a = fp->un.fmt7.wb3a;
-			fp->un.fmt7.wb2d = fp->un.fmt7.wb3d;
-		    }
-		else
-			fp->un.fmt7.wb3s = 0;
-	}
-
-	if (res)
-		send_fault_sig(&fp->ptregs);
-}
-
-/*
- * called from sigreturn(), must ensure userspace code didn't
- * manipulate exception frame to circumvent protection, then complete
- * pending writebacks
- * we just clear TM2 to turn it into a userspace access
- */
-asmlinkage void berr_040cleanup(struct frame *fp)
-{
-	fp->un.fmt7.wb2s &= ~4;
-	fp->un.fmt7.wb3s &= ~4;
-
-	do_040writebacks(fp);
-}
-
-static inline void access_error040(struct frame *fp)
-{
-	unsigned short ssw = fp->un.fmt7.ssw;
-	unsigned long mmusr;
-
-#ifdef DEBUG
-	printk("ssw=%#x, fa=%#lx\n", ssw, fp->un.fmt7.faddr);
-        printk("wb1s=%#x, wb2s=%#x, wb3s=%#x\n", fp->un.fmt7.wb1s,
-		fp->un.fmt7.wb2s, fp->un.fmt7.wb3s);
-	printk ("wb2a=%lx, wb3a=%lx, wb2d=%lx, wb3d=%lx\n",
-		fp->un.fmt7.wb2a, fp->un.fmt7.wb3a,
-		fp->un.fmt7.wb2d, fp->un.fmt7.wb3d);
-#endif
-
-	if (ssw & ATC_040) {
-		unsigned long addr = fp->un.fmt7.faddr;
-		unsigned long errorcode;
-
-		/*
-		 * The MMU status has to be determined AFTER the address
-		 * has been corrected if there was a misaligned access (MA).
-		 */
-		if (ssw & MA_040)
-			addr = (addr + 7) & -8;
-
-		/* MMU error, get the MMUSR info for this access */
-		mmusr = probe040(!(ssw & RW_040), addr, ssw);
-#ifdef DEBUG
-		printk("mmusr = %lx\n", mmusr);
-#endif
-		errorcode = 1;
-		if (!(mmusr & MMU_R_040)) {
-			/* clear the invalid atc entry */
-			__flush_tlb040_one(addr);
-			errorcode = 0;
-		}
-
-		/* despite what documentation seems to say, RMW
-		 * accesses have always both the LK and RW bits set */
-		if (!(ssw & RW_040) || (ssw & LK_040))
-			errorcode |= 2;
-
-		if (do_page_fault(&fp->ptregs, addr, errorcode)) {
-#ifdef DEBUG
-			printk("do_page_fault() !=0\n");
-#endif
-			if (user_mode(&fp->ptregs)){
-				/* delay writebacks after signal delivery */
-#ifdef DEBUG
-			        printk(".. was usermode - return\n");
-#endif
-				return;
-			}
-			/* disable writeback into user space from kernel
-			 * (if do_page_fault didn't fix the mapping,
-                         * the writeback won't do good)
-			 */
-disable_wb:
-#ifdef DEBUG
-			printk(".. disabling wb2\n");
-#endif
-			if (fp->un.fmt7.wb2a == fp->un.fmt7.faddr)
-				fp->un.fmt7.wb2s &= ~WBV_040;
-			if (fp->un.fmt7.wb3a == fp->un.fmt7.faddr)
-				fp->un.fmt7.wb3s &= ~WBV_040;
-		}
-	} else {
-		/* In case of a bus error we either kill the process or expect
-		 * the kernel to catch the fault, which then is also responsible
-		 * for cleaning up the mess.
-		 */
-		current->thread.signo = SIGBUS;
-		current->thread.faddr = fp->un.fmt7.faddr;
-		if (send_fault_sig(&fp->ptregs) >= 0)
-			printk("68040 bus error (ssw=%x, faddr=%lx)\n", ssw,
-			       fp->un.fmt7.faddr);
-		goto disable_wb;
-	}
-
-	do_040writebacks(fp);
-}
-#endif /* CONFIG_M68040 */
-
-#if defined(CONFIG_SUN3)
-#include <asm/sun3mmu.h>
-
-extern int mmu_emu_handle_fault (unsigned long, int, int);
-
-/* sun3 version of bus_error030 */
-
-static inline void bus_error030 (struct frame *fp)
-{
-	unsigned char buserr_type = sun3_get_buserr ();
-	unsigned long addr, errorcode;
-	unsigned short ssw = fp->un.fmtb.ssw;
-	extern unsigned long _sun3_map_test_start, _sun3_map_test_end;
-
-#ifdef DEBUG
-	if (ssw & (FC | FB))
-		printk ("Instruction fault at %#010lx\n",
-			ssw & FC ?
-			fp->ptregs.format == 0xa ? fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2
-			:
-			fp->ptregs.format == 0xa ? fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
-	if (ssw & DF)
-		printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n",
-			ssw & RW ? "read" : "write",
-			fp->un.fmtb.daddr,
-			space_names[ssw & DFC], fp->ptregs.pc);
-#endif
-
-	/*
-	 * Check if this page should be demand-mapped. This needs to go before
-	 * the testing for a bad kernel-space access (demand-mapping applies
-	 * to kernel accesses too).
-	 */
-
-	if ((ssw & DF)
-	    && (buserr_type & (SUN3_BUSERR_PROTERR | SUN3_BUSERR_INVALID))) {
-		if (mmu_emu_handle_fault (fp->un.fmtb.daddr, ssw & RW, 0))
-			return;
-	}
-
-	/* Check for kernel-space pagefault (BAD). */
-	if (fp->ptregs.sr & PS_S) {
-		/* kernel fault must be a data fault to user space */
-		if (! ((ssw & DF) && ((ssw & DFC) == USER_DATA))) {
-		     // try checking the kernel mappings before surrender
-		     if (mmu_emu_handle_fault (fp->un.fmtb.daddr, ssw & RW, 1))
-			  return;
-			/* instruction fault or kernel data fault! */
-			if (ssw & (FC | FB))
-				printk ("Instruction fault at %#010lx\n",
-					fp->ptregs.pc);
-			if (ssw & DF) {
-				/* was this fault incurred testing bus mappings? */
-				if((fp->ptregs.pc >= (unsigned long)&_sun3_map_test_start) &&
-				   (fp->ptregs.pc <= (unsigned long)&_sun3_map_test_end)) {
-					send_fault_sig(&fp->ptregs);
-					return;
-				}
-
-				printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n",
-					ssw & RW ? "read" : "write",
-					fp->un.fmtb.daddr,
-					space_names[ssw & DFC], fp->ptregs.pc);
-			}
-			printk ("BAD KERNEL BUSERR\n");
-
-			die_if_kernel("Oops", &fp->ptregs,0);
-			force_sig(SIGKILL, current);
-			return;
-		}
-	} else {
-		/* user fault */
-		if (!(ssw & (FC | FB)) && !(ssw & DF))
-			/* not an instruction fault or data fault! BAD */
-			panic ("USER BUSERR w/o instruction or data fault");
-	}
-
-
-	/* First handle the data fault, if any.  */
-	if (ssw & DF) {
-		addr = fp->un.fmtb.daddr;
-
-// errorcode bit 0:	0 -> no page		1 -> protection fault
-// errorcode bit 1:	0 -> read fault		1 -> write fault
-
-// (buserr_type & SUN3_BUSERR_PROTERR)	-> protection fault
-// (buserr_type & SUN3_BUSERR_INVALID)	-> invalid page fault
-
-		if (buserr_type & SUN3_BUSERR_PROTERR)
-			errorcode = 0x01;
-		else if (buserr_type & SUN3_BUSERR_INVALID)
-			errorcode = 0x00;
-		else {
-#ifdef DEBUG
-			printk ("*** unexpected busfault type=%#04x\n", buserr_type);
-			printk ("invalid %s access at %#lx from pc %#lx\n",
-				!(ssw & RW) ? "write" : "read", addr,
-				fp->ptregs.pc);
-#endif
-			die_if_kernel ("Oops", &fp->ptregs, buserr_type);
-			force_sig (SIGBUS, current);
-			return;
-		}
-
-//todo: wtf is RM bit? --m
-		if (!(ssw & RW) || ssw & RM)
-			errorcode |= 0x02;
-
-		/* Handle page fault. */
-		do_page_fault (&fp->ptregs, addr, errorcode);
-
-		/* Retry the data fault now. */
-		return;
-	}
-
-	/* Now handle the instruction fault. */
-
-	/* Get the fault address. */
-	if (fp->ptregs.format == 0xA)
-		addr = fp->ptregs.pc + 4;
-	else
-		addr = fp->un.fmtb.baddr;
-	if (ssw & FC)
-		addr -= 2;
-
-	if (buserr_type & SUN3_BUSERR_INVALID) {
-		if (!mmu_emu_handle_fault (fp->un.fmtb.daddr, 1, 0))
-			do_page_fault (&fp->ptregs, addr, 0);
-       } else {
-#ifdef DEBUG
-		printk ("protection fault on insn access (segv).\n");
-#endif
-		force_sig (SIGSEGV, current);
-       }
-}
-#else
-#if defined(CPU_M68020_OR_M68030)
-static inline void bus_error030 (struct frame *fp)
-{
-	volatile unsigned short temp;
-	unsigned short mmusr;
-	unsigned long addr, errorcode;
-	unsigned short ssw = fp->un.fmtb.ssw;
-#ifdef DEBUG
-	unsigned long desc;
-
-	printk ("pid = %x  ", current->pid);
-	printk ("SSW=%#06x  ", ssw);
-
-	if (ssw & (FC | FB))
-		printk ("Instruction fault at %#010lx\n",
-			ssw & FC ?
-			fp->ptregs.format == 0xa ? fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2
-			:
-			fp->ptregs.format == 0xa ? fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
-	if (ssw & DF)
-		printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n",
-			ssw & RW ? "read" : "write",
-			fp->un.fmtb.daddr,
-			space_names[ssw & DFC], fp->ptregs.pc);
-#endif
-
-	/* ++andreas: If a data fault and an instruction fault happen
-	   at the same time map in both pages.  */
-
-	/* First handle the data fault, if any.  */
-	if (ssw & DF) {
-		addr = fp->un.fmtb.daddr;
-
-#ifdef DEBUG
-		asm volatile ("ptestr %3,%2@,#7,%0\n\t"
-			      "pmove %%psr,%1@"
-			      : "=a&" (desc)
-			      : "a" (&temp), "a" (addr), "d" (ssw));
-#else
-		asm volatile ("ptestr %2,%1@,#7\n\t"
-			      "pmove %%psr,%0@"
-			      : : "a" (&temp), "a" (addr), "d" (ssw));
-#endif
-		mmusr = temp;
-
-#ifdef DEBUG
-		printk("mmusr is %#x for addr %#lx in task %p\n",
-		       mmusr, addr, current);
-		printk("descriptor address is %#lx, contents %#lx\n",
-		       __va(desc), *(unsigned long *)__va(desc));
-#endif
-
-		errorcode = (mmusr & MMU_I) ? 0 : 1;
-		if (!(ssw & RW) || (ssw & RM))
-			errorcode |= 2;
-
-		if (mmusr & (MMU_I | MMU_WP)) {
-			if (ssw & 4) {
-				printk("Data %s fault at %#010lx in %s (pc=%#lx)\n",
-				       ssw & RW ? "read" : "write",
-				       fp->un.fmtb.daddr,
-				       space_names[ssw & DFC], fp->ptregs.pc);
-				goto buserr;
-			}
-			/* Don't try to do anything further if an exception was
-			   handled. */
-			if (do_page_fault (&fp->ptregs, addr, errorcode) < 0)
-				return;
-		} else if (!(mmusr & MMU_I)) {
-			/* probably a 020 cas fault */
-			if (!(ssw & RM) && send_fault_sig(&fp->ptregs) > 0)
-				printk("unexpected bus error (%#x,%#x)\n", ssw, mmusr);
-		} else if (mmusr & (MMU_B|MMU_L|MMU_S)) {
-			printk("invalid %s access at %#lx from pc %#lx\n",
-			       !(ssw & RW) ? "write" : "read", addr,
-			       fp->ptregs.pc);
-			die_if_kernel("Oops",&fp->ptregs,mmusr);
-			force_sig(SIGSEGV, current);
-			return;
-		} else {
-#if 0
-			static volatile long tlong;
-#endif
-
-			printk("weird %s access at %#lx from pc %#lx (ssw is %#x)\n",
-			       !(ssw & RW) ? "write" : "read", addr,
-			       fp->ptregs.pc, ssw);
-			asm volatile ("ptestr #1,%1@,#0\n\t"
-				      "pmove %%psr,%0@"
-				      : /* no outputs */
-				      : "a" (&temp), "a" (addr));
-			mmusr = temp;
-
-			printk ("level 0 mmusr is %#x\n", mmusr);
-#if 0
-			asm volatile ("pmove %%tt0,%0@"
-				      : /* no outputs */
-				      : "a" (&tlong));
-			printk("tt0 is %#lx, ", tlong);
-			asm volatile ("pmove %%tt1,%0@"
-				      : /* no outputs */
-				      : "a" (&tlong));
-			printk("tt1 is %#lx\n", tlong);
-#endif
-#ifdef DEBUG
-			printk("Unknown SIGSEGV - 1\n");
-#endif
-			die_if_kernel("Oops",&fp->ptregs,mmusr);
-			force_sig(SIGSEGV, current);
-			return;
-		}
-
-		/* setup an ATC entry for the access about to be retried */
-		if (!(ssw & RW) || (ssw & RM))
-			asm volatile ("ploadw %1,%0@" : /* no outputs */
-				      : "a" (addr), "d" (ssw));
-		else
-			asm volatile ("ploadr %1,%0@" : /* no outputs */
-				      : "a" (addr), "d" (ssw));
-	}
-
-	/* Now handle the instruction fault. */
-
-	if (!(ssw & (FC|FB)))
-		return;
-
-	if (fp->ptregs.sr & PS_S) {
-		printk("Instruction fault at %#010lx\n",
-			fp->ptregs.pc);
-	buserr:
-		printk ("BAD KERNEL BUSERR\n");
-		die_if_kernel("Oops",&fp->ptregs,0);
-		force_sig(SIGKILL, current);
-		return;
-	}
-
-	/* get the fault address */
-	if (fp->ptregs.format == 10)
-		addr = fp->ptregs.pc + 4;
-	else
-		addr = fp->un.fmtb.baddr;
-	if (ssw & FC)
-		addr -= 2;
-
-	if ((ssw & DF) && ((addr ^ fp->un.fmtb.daddr) & PAGE_MASK) == 0)
-		/* Insn fault on same page as data fault.  But we
-		   should still create the ATC entry.  */
-		goto create_atc_entry;
-
-#ifdef DEBUG
-	asm volatile ("ptestr #1,%2@,#7,%0\n\t"
-		      "pmove %%psr,%1@"
-		      : "=a&" (desc)
-		      : "a" (&temp), "a" (addr));
-#else
-	asm volatile ("ptestr #1,%1@,#7\n\t"
-		      "pmove %%psr,%0@"
-		      : : "a" (&temp), "a" (addr));
-#endif
-	mmusr = temp;
-
-#ifdef DEBUG
-	printk ("mmusr is %#x for addr %#lx in task %p\n",
-		mmusr, addr, current);
-	printk ("descriptor address is %#lx, contents %#lx\n",
-		__va(desc), *(unsigned long *)__va(desc));
-#endif
-
-	if (mmusr & MMU_I)
-		do_page_fault (&fp->ptregs, addr, 0);
-	else if (mmusr & (MMU_B|MMU_L|MMU_S)) {
-		printk ("invalid insn access at %#lx from pc %#lx\n",
-			addr, fp->ptregs.pc);
-#ifdef DEBUG
-		printk("Unknown SIGSEGV - 2\n");
-#endif
-		die_if_kernel("Oops",&fp->ptregs,mmusr);
-		force_sig(SIGSEGV, current);
-		return;
-	}
-
-create_atc_entry:
-	/* setup an ATC entry for the access about to be retried */
-	asm volatile ("ploadr #2,%0@" : /* no outputs */
-		      : "a" (addr));
-}
-#endif /* CPU_M68020_OR_M68030 */
-#endif /* !CONFIG_SUN3 */
-
-asmlinkage void buserr_c(struct frame *fp)
-{
-	/* Only set esp0 if coming from user mode */
-	if (user_mode(&fp->ptregs))
-		current->thread.esp0 = (unsigned long) fp;
-
-#ifdef DEBUG
-	printk ("*** Bus Error *** Format is %x\n", fp->ptregs.format);
-#endif
-
-	switch (fp->ptregs.format) {
-#if defined (CONFIG_M68060)
-	case 4:				/* 68060 access error */
-	  access_error060 (fp);
-	  break;
-#endif
-#if defined (CONFIG_M68040)
-	case 0x7:			/* 68040 access error */
-	  access_error040 (fp);
-	  break;
-#endif
-#if defined (CPU_M68020_OR_M68030)
-	case 0xa:
-	case 0xb:
-	  bus_error030 (fp);
-	  break;
-#endif
-	default:
-	  die_if_kernel("bad frame format",&fp->ptregs,0);
-#ifdef DEBUG
-	  printk("Unknown SIGSEGV - 4\n");
-#endif
-	  force_sig(SIGSEGV, current);
-	}
-}
-
-
-static int kstack_depth_to_print = 48;
-
-void show_trace(unsigned long *stack)
-{
-	unsigned long *endstack;
-	unsigned long addr;
-	int i;
-
-	printk("Call Trace:");
-	addr = (unsigned long)stack + THREAD_SIZE - 1;
-	endstack = (unsigned long *)(addr & -THREAD_SIZE);
-	i = 0;
-	while (stack + 1 <= endstack) {
-		addr = *stack++;
-		/*
-		 * If the address is either in the text segment of the
-		 * kernel, or in the region which contains vmalloc'ed
-		 * memory, it *may* be the address of a calling
-		 * routine; if so, print it so that someone tracing
-		 * down the cause of the crash will be able to figure
-		 * out the call path that was taken.
-		 */
-		if (__kernel_text_address(addr)) {
-#ifndef CONFIG_KALLSYMS
-			if (i % 5 == 0)
-				printk("\n       ");
-#endif
-			printk(" [<%08lx>] %pS\n", addr, (void *)addr);
-			i++;
-		}
-	}
-	printk("\n");
-}
-
-void show_registers(struct pt_regs *regs)
-{
-	struct frame *fp = (struct frame *)regs;
-	mm_segment_t old_fs = get_fs();
-	u16 c, *cp;
-	unsigned long addr;
-	int i;
-
-	print_modules();
-	printk("PC: [<%08lx>] %pS\n", regs->pc, (void *)regs->pc);
-	printk("SR: %04x  SP: %p  a2: %08lx\n", regs->sr, regs, regs->a2);
-	printk("d0: %08lx    d1: %08lx    d2: %08lx    d3: %08lx\n",
-	       regs->d0, regs->d1, regs->d2, regs->d3);
-	printk("d4: %08lx    d5: %08lx    a0: %08lx    a1: %08lx\n",
-	       regs->d4, regs->d5, regs->a0, regs->a1);
-
-	printk("Process %s (pid: %d, task=%p)\n",
-		current->comm, task_pid_nr(current), current);
-	addr = (unsigned long)&fp->un;
-	printk("Frame format=%X ", regs->format);
-	switch (regs->format) {
-	case 0x2:
-		printk("instr addr=%08lx\n", fp->un.fmt2.iaddr);
-		addr += sizeof(fp->un.fmt2);
-		break;
-	case 0x3:
-		printk("eff addr=%08lx\n", fp->un.fmt3.effaddr);
-		addr += sizeof(fp->un.fmt3);
-		break;
-	case 0x4:
-		printk((CPU_IS_060 ? "fault addr=%08lx fslw=%08lx\n"
-			: "eff addr=%08lx pc=%08lx\n"),
-			fp->un.fmt4.effaddr, fp->un.fmt4.pc);
-		addr += sizeof(fp->un.fmt4);
-		break;
-	case 0x7:
-		printk("eff addr=%08lx ssw=%04x faddr=%08lx\n",
-			fp->un.fmt7.effaddr, fp->un.fmt7.ssw, fp->un.fmt7.faddr);
-		printk("wb 1 stat/addr/data: %04x %08lx %08lx\n",
-			fp->un.fmt7.wb1s, fp->un.fmt7.wb1a, fp->un.fmt7.wb1dpd0);
-		printk("wb 2 stat/addr/data: %04x %08lx %08lx\n",
-			fp->un.fmt7.wb2s, fp->un.fmt7.wb2a, fp->un.fmt7.wb2d);
-		printk("wb 3 stat/addr/data: %04x %08lx %08lx\n",
-			fp->un.fmt7.wb3s, fp->un.fmt7.wb3a, fp->un.fmt7.wb3d);
-		printk("push data: %08lx %08lx %08lx %08lx\n",
-			fp->un.fmt7.wb1dpd0, fp->un.fmt7.pd1, fp->un.fmt7.pd2,
-			fp->un.fmt7.pd3);
-		addr += sizeof(fp->un.fmt7);
-		break;
-	case 0x9:
-		printk("instr addr=%08lx\n", fp->un.fmt9.iaddr);
-		addr += sizeof(fp->un.fmt9);
-		break;
-	case 0xa:
-		printk("ssw=%04x isc=%04x isb=%04x daddr=%08lx dobuf=%08lx\n",
-			fp->un.fmta.ssw, fp->un.fmta.isc, fp->un.fmta.isb,
-			fp->un.fmta.daddr, fp->un.fmta.dobuf);
-		addr += sizeof(fp->un.fmta);
-		break;
-	case 0xb:
-		printk("ssw=%04x isc=%04x isb=%04x daddr=%08lx dobuf=%08lx\n",
-			fp->un.fmtb.ssw, fp->un.fmtb.isc, fp->un.fmtb.isb,
-			fp->un.fmtb.daddr, fp->un.fmtb.dobuf);
-		printk("baddr=%08lx dibuf=%08lx ver=%x\n",
-			fp->un.fmtb.baddr, fp->un.fmtb.dibuf, fp->un.fmtb.ver);
-		addr += sizeof(fp->un.fmtb);
-		break;
-	default:
-		printk("\n");
-	}
-	show_stack(NULL, (unsigned long *)addr);
-
-	printk("Code:");
-	set_fs(KERNEL_DS);
-	cp = (u16 *)regs->pc;
-	for (i = -8; i < 16; i++) {
-		if (get_user(c, cp + i) && i >= 0) {
-			printk(" Bad PC value.");
-			break;
-		}
-		printk(i ? " %04x" : " <%04x>", c);
-	}
-	set_fs(old_fs);
-	printk ("\n");
-}
-
-void show_stack(struct task_struct *task, unsigned long *stack)
-{
-	unsigned long *p;
-	unsigned long *endstack;
-	int i;
-
-	if (!stack) {
-		if (task)
-			stack = (unsigned long *)task->thread.esp0;
-		else
-			stack = (unsigned long *)&stack;
-	}
-	endstack = (unsigned long *)(((unsigned long)stack + THREAD_SIZE - 1) & -THREAD_SIZE);
-
-	printk("Stack from %08lx:", (unsigned long)stack);
-	p = stack;
-	for (i = 0; i < kstack_depth_to_print; i++) {
-		if (p + 1 > endstack)
-			break;
-		if (i % 8 == 0)
-			printk("\n       ");
-		printk(" %08lx", *p++);
-	}
-	printk("\n");
-	show_trace(stack);
-}
-
-/*
- * The architecture-independent backtrace generator
- */
-void dump_stack(void)
-{
-	unsigned long stack;
-
-	show_trace(&stack);
-}
-
-EXPORT_SYMBOL(dump_stack);
-
-void bad_super_trap (struct frame *fp)
-{
-	console_verbose();
-	if (fp->ptregs.vector < 4 * ARRAY_SIZE(vec_names))
-		printk ("*** %s ***   FORMAT=%X\n",
-			vec_names[(fp->ptregs.vector) >> 2],
-			fp->ptregs.format);
-	else
-		printk ("*** Exception %d ***   FORMAT=%X\n",
-			(fp->ptregs.vector) >> 2,
-			fp->ptregs.format);
-	if (fp->ptregs.vector >> 2 == VEC_ADDRERR && CPU_IS_020_OR_030) {
-		unsigned short ssw = fp->un.fmtb.ssw;
-
-		printk ("SSW=%#06x  ", ssw);
-
-		if (ssw & RC)
-			printk ("Pipe stage C instruction fault at %#010lx\n",
-				(fp->ptregs.format) == 0xA ?
-				fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2);
-		if (ssw & RB)
-			printk ("Pipe stage B instruction fault at %#010lx\n",
-				(fp->ptregs.format) == 0xA ?
-				fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
-		if (ssw & DF)
-			printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n",
-				ssw & RW ? "read" : "write",
-				fp->un.fmtb.daddr, space_names[ssw & DFC],
-				fp->ptregs.pc);
-	}
-	printk ("Current process id is %d\n", task_pid_nr(current));
-	die_if_kernel("BAD KERNEL TRAP", &fp->ptregs, 0);
-}
-
-asmlinkage void trap_c(struct frame *fp)
-{
-	int sig;
-	siginfo_t info;
-
-	if (fp->ptregs.sr & PS_S) {
-		if (fp->ptregs.vector == VEC_TRACE << 2) {
-			/* traced a trapping instruction on a 68020/30,
-			 * real exception will be executed afterwards.
-			 */
-		} else if (!handle_kernel_fault(&fp->ptregs))
-			bad_super_trap(fp);
-		return;
-	}
-
-	/* send the appropriate signal to the user program */
-	switch ((fp->ptregs.vector) >> 2) {
-	    case VEC_ADDRERR:
-		info.si_code = BUS_ADRALN;
-		sig = SIGBUS;
-		break;
-	    case VEC_ILLEGAL:
-	    case VEC_LINE10:
-	    case VEC_LINE11:
-		info.si_code = ILL_ILLOPC;
-		sig = SIGILL;
-		break;
-	    case VEC_PRIV:
-		info.si_code = ILL_PRVOPC;
-		sig = SIGILL;
-		break;
-	    case VEC_COPROC:
-		info.si_code = ILL_COPROC;
-		sig = SIGILL;
-		break;
-	    case VEC_TRAP1:
-	    case VEC_TRAP2:
-	    case VEC_TRAP3:
-	    case VEC_TRAP4:
-	    case VEC_TRAP5:
-	    case VEC_TRAP6:
-	    case VEC_TRAP7:
-	    case VEC_TRAP8:
-	    case VEC_TRAP9:
-	    case VEC_TRAP10:
-	    case VEC_TRAP11:
-	    case VEC_TRAP12:
-	    case VEC_TRAP13:
-	    case VEC_TRAP14:
-		info.si_code = ILL_ILLTRP;
-		sig = SIGILL;
-		break;
-	    case VEC_FPBRUC:
-	    case VEC_FPOE:
-	    case VEC_FPNAN:
-		info.si_code = FPE_FLTINV;
-		sig = SIGFPE;
-		break;
-	    case VEC_FPIR:
-		info.si_code = FPE_FLTRES;
-		sig = SIGFPE;
-		break;
-	    case VEC_FPDIVZ:
-		info.si_code = FPE_FLTDIV;
-		sig = SIGFPE;
-		break;
-	    case VEC_FPUNDER:
-		info.si_code = FPE_FLTUND;
-		sig = SIGFPE;
-		break;
-	    case VEC_FPOVER:
-		info.si_code = FPE_FLTOVF;
-		sig = SIGFPE;
-		break;
-	    case VEC_ZERODIV:
-		info.si_code = FPE_INTDIV;
-		sig = SIGFPE;
-		break;
-	    case VEC_CHK:
-	    case VEC_TRAP:
-		info.si_code = FPE_INTOVF;
-		sig = SIGFPE;
-		break;
-	    case VEC_TRACE:		/* ptrace single step */
-		info.si_code = TRAP_TRACE;
-		sig = SIGTRAP;
-		break;
-	    case VEC_TRAP15:		/* breakpoint */
-		info.si_code = TRAP_BRKPT;
-		sig = SIGTRAP;
-		break;
-	    default:
-		info.si_code = ILL_ILLOPC;
-		sig = SIGILL;
-		break;
-	}
-	info.si_signo = sig;
-	info.si_errno = 0;
-	switch (fp->ptregs.format) {
-	    default:
-		info.si_addr = (void *) fp->ptregs.pc;
-		break;
-	    case 2:
-		info.si_addr = (void *) fp->un.fmt2.iaddr;
-		break;
-	    case 7:
-		info.si_addr = (void *) fp->un.fmt7.effaddr;
-		break;
-	    case 9:
-		info.si_addr = (void *) fp->un.fmt9.iaddr;
-		break;
-	    case 10:
-		info.si_addr = (void *) fp->un.fmta.daddr;
-		break;
-	    case 11:
-		info.si_addr = (void *) fp->un.fmtb.daddr;
-		break;
-	}
-	force_sig_info (sig, &info, current);
-}
-
-void die_if_kernel (char *str, struct pt_regs *fp, int nr)
-{
-	if (!(fp->sr & PS_S))
-		return;
-
-	console_verbose();
-	printk("%s: %08x\n",str,nr);
-	show_registers(fp);
-	add_taint(TAINT_DIE);
-	do_exit(SIGSEGV);
-}
-
-/*
- * This function is called if an error occur while accessing
- * user-space from the fpsp040 code.
- */
-asmlinkage void fpsp040_die(void)
-{
-	do_exit(SIGSEGV);
-}
-
-#ifdef CONFIG_M68KFPU_EMU
-asmlinkage void fpemu_signal(int signal, int code, void *addr)
-{
-	siginfo_t info;
-
-	info.si_signo = signal;
-	info.si_errno = 0;
-	info.si_code = code;
-	info.si_addr = addr;
-	force_sig_info(signal, &info, current);
-}
+#include "traps_no.c"
 #endif

arch/m68k/kernel/traps_mm.c

···
+/*
+ *  linux/arch/m68k/kernel/traps.c
+ *
+ *  Copyright (C) 1993, 1994 by Hamish Macdonald
+ *
+ *  68040 fixes by Michael Rausch
+ *  68040 fixes by Martin Apel
+ *  68040 fixes and writeback by Richard Zidlicky
+ *  68060 fixes by Roman Hodek
+ *  68060 fixes by Jesper Skov
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+/*
+ * Sets up all exception vectors
+ */
+
+#include <linux/sched.h>
+#include <linux/signal.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/user.h>
+#include <linux/string.h>
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <linux/ptrace.h>
+#include <linux/kallsyms.h>
+
+#include <asm/setup.h>
+#include <asm/fpu.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include <asm/traps.h>
+#include <asm/pgalloc.h>
+#include <asm/machdep.h>
+#include <asm/siginfo.h>
+
+/* assembler routines */
+asmlinkage void system_call(void);
+asmlinkage void buserr(void);
+asmlinkage void trap(void);
+asmlinkage void nmihandler(void);
+#ifdef CONFIG_M68KFPU_EMU
+asmlinkage void fpu_emu(void);
+#endif
+
+e_vector vectors[256];
+
+/* nmi handler for the Amiga */
+asm(".text\n"
+    __ALIGN_STR "\n"
+    "nmihandler: rte");
+
+/*
+ * this must be called very early as the kernel might
+ * use some instruction that are emulated on the 060
+ * and so we're prepared for early probe attempts (e.g. nf_init).
+ */
+void __init base_trap_init(void)
+{
+	if (MACH_IS_SUN3X) {
+		extern e_vector *sun3x_prom_vbr;
+
+		__asm__ volatile ("movec %%vbr, %0" : "=r" (sun3x_prom_vbr));
+	}
+
+	/* setup the exception vector table */
+	__asm__ volatile ("movec %0,%%vbr" : : "r" ((void*)vectors));
+
+	if (CPU_IS_060) {
+		/* set up ISP entry points */
+		asmlinkage void unimp_vec(void) asm ("_060_isp_unimp");
+
+		vectors[VEC_UNIMPII] = unimp_vec;
+	}
+
+	vectors[VEC_BUSERR] = buserr;
+	vectors[VEC_ILLEGAL] = trap;
+	vectors[VEC_SYS] = system_call;
+}
+
+void __init trap_init (void)
+{
+	int i;
+
+	for (i = VEC_SPUR; i <= VEC_INT7; i++)
+		vectors[i] = bad_inthandler;
+
+	for (i = 0; i < VEC_USER; i++)
+		if (!vectors[i])
+			vectors[i] = trap;
+
+	for (i = VEC_USER; i < 256; i++)
+		vectors[i] = bad_inthandler;
+
+#ifdef CONFIG_M68KFPU_EMU
+	if (FPU_IS_EMU)
+		vectors[VEC_LINE11] = fpu_emu;
+#endif
+
+	if (CPU_IS_040 && !FPU_IS_EMU) {
+		/* set up FPSP entry points */
+		asmlinkage void dz_vec(void) asm ("dz");
+		asmlinkage void inex_vec(void) asm ("inex");
+		asmlinkage void ovfl_vec(void) asm ("ovfl");
+		asmlinkage void unfl_vec(void) asm ("unfl");
+		asmlinkage void snan_vec(void) asm ("snan");
+		asmlinkage void operr_vec(void) asm ("operr");
+		asmlinkage void bsun_vec(void) asm ("bsun");
+		asmlinkage void fline_vec(void) asm ("fline");
+		asmlinkage void unsupp_vec(void) asm ("unsupp");
+
+		vectors[VEC_FPDIVZ] = dz_vec;
+		vectors[VEC_FPIR] = inex_vec;
+		vectors[VEC_FPOVER] = ovfl_vec;
+		vectors[VEC_FPUNDER] = unfl_vec;
+		vectors[VEC_FPNAN] = snan_vec;
+		vectors[VEC_FPOE] = operr_vec;
+		vectors[VEC_FPBRUC] = bsun_vec;
+		vectors[VEC_LINE11] = fline_vec;
+		vectors[VEC_FPUNSUP] = unsupp_vec;
+	}
+
+	if (CPU_IS_060 && !FPU_IS_EMU) {
+		/* set up IFPSP entry points */
+		asmlinkage void snan_vec6(void) asm ("_060_fpsp_snan");
+		asmlinkage void operr_vec6(void) asm ("_060_fpsp_operr");
+		asmlinkage void ovfl_vec6(void) asm ("_060_fpsp_ovfl");
+		asmlinkage void unfl_vec6(void) asm ("_060_fpsp_unfl");
+		asmlinkage void dz_vec6(void) asm ("_060_fpsp_dz");
+		asmlinkage void inex_vec6(void) asm ("_060_fpsp_inex");
+		asmlinkage void fline_vec6(void) asm ("_060_fpsp_fline");
+		asmlinkage void unsupp_vec6(void) asm ("_060_fpsp_unsupp");
+		asmlinkage void effadd_vec6(void) asm ("_060_fpsp_effadd");
+
+		vectors[VEC_FPNAN] = snan_vec6;
+		vectors[VEC_FPOE] = operr_vec6;
+		vectors[VEC_FPOVER] = ovfl_vec6;
+		vectors[VEC_FPUNDER] = unfl_vec6;
+		vectors[VEC_FPDIVZ] = dz_vec6;
+		vectors[VEC_FPIR] = inex_vec6;
+		vectors[VEC_LINE11] = fline_vec6;
+		vectors[VEC_FPUNSUP] = unsupp_vec6;
+		vectors[VEC_UNIMPEA] = effadd_vec6;
+	}
+
+        /* if running on an amiga, make the NMI interrupt do nothing */
+	if (MACH_IS_AMIGA) {
+		vectors[VEC_INT7] = nmihandler;
+	}
+}
+
+
+static const char *vec_names[] = {
+	[VEC_RESETSP]	= "RESET SP",
+	[VEC_RESETPC]	= "RESET PC",
+	[VEC_BUSERR]	= "BUS ERROR",
+	[VEC_ADDRERR]	= "ADDRESS ERROR",
+	[VEC_ILLEGAL]	= "ILLEGAL INSTRUCTION",
+	[VEC_ZERODIV]	= "ZERO DIVIDE",
+	[VEC_CHK]	= "CHK",
+	[VEC_TRAP]	= "TRAPcc",
+	[VEC_PRIV]	= "PRIVILEGE VIOLATION",
+	[VEC_TRACE]	= "TRACE",
+	[VEC_LINE10]	= "LINE 1010",
+	[VEC_LINE11]	= "LINE 1111",
+	[VEC_RESV12]	= "UNASSIGNED RESERVED 12",
+	[VEC_COPROC]	= "COPROCESSOR PROTOCOL VIOLATION",
+	[VEC_FORMAT]	= "FORMAT ERROR",
+	[VEC_UNINT]	= "UNINITIALIZED INTERRUPT",
+	[VEC_RESV16]	= "UNASSIGNED RESERVED 16",
+	[VEC_RESV17]	= "UNASSIGNED RESERVED 17",
+	[VEC_RESV18]	= "UNASSIGNED RESERVED 18",
+	[VEC_RESV19]	= "UNASSIGNED RESERVED 19",
+	[VEC_RESV20]	= "UNASSIGNED RESERVED 20",
+	[VEC_RESV21]	= "UNASSIGNED RESERVED 21",
+	[VEC_RESV22]	= "UNASSIGNED RESERVED 22",
+	[VEC_RESV23]	= "UNASSIGNED RESERVED 23",
+	[VEC_SPUR]	= "SPURIOUS INTERRUPT",
+	[VEC_INT1]	= "LEVEL 1 INT",
+	[VEC_INT2]	= "LEVEL 2 INT",
+	[VEC_INT3]	= "LEVEL 3 INT",
+	[VEC_INT4]	= "LEVEL 4 INT",
+	[VEC_INT5]	= "LEVEL 5 INT",
+	[VEC_INT6]	= "LEVEL 6 INT",
+	[VEC_INT7]	= "LEVEL 7 INT",
+	[VEC_SYS]	= "SYSCALL",
+	[VEC_TRAP1]	= "TRAP #1",
+	[VEC_TRAP2]	= "TRAP #2",
+	[VEC_TRAP3]	= "TRAP #3",
+	[VEC_TRAP4]	= "TRAP #4",
+	[VEC_TRAP5]	= "TRAP #5",
+	[VEC_TRAP6]	= "TRAP #6",
+	[VEC_TRAP7]	= "TRAP #7",
+	[VEC_TRAP8]	= "TRAP #8",
+	[VEC_TRAP9]	= "TRAP #9",
+	[VEC_TRAP10]	= "TRAP #10",
+	[VEC_TRAP11]	= "TRAP #11",
+	[VEC_TRAP12]	= "TRAP #12",
+	[VEC_TRAP13]	= "TRAP #13",
+	[VEC_TRAP14]	= "TRAP #14",
+	[VEC_TRAP15]	= "TRAP #15",
+	[VEC_FPBRUC]	= "FPCP BSUN",
+	[VEC_FPIR]	= "FPCP INEXACT",
+	[VEC_FPDIVZ]	= "FPCP DIV BY 0",
+	[VEC_FPUNDER]	= "FPCP UNDERFLOW",
+	[VEC_FPOE]	= "FPCP OPERAND ERROR",
+	[VEC_FPOVER]	= "FPCP OVERFLOW",
+	[VEC_FPNAN]	= "FPCP SNAN",
+	[VEC_FPUNSUP]	= "FPCP UNSUPPORTED OPERATION",
+	[VEC_MMUCFG]	= "MMU CONFIGURATION ERROR",
+	[VEC_MMUILL]	= "MMU ILLEGAL OPERATION ERROR",
+	[VEC_MMUACC]	= "MMU ACCESS LEVEL VIOLATION ERROR",
+	[VEC_RESV59]	= "UNASSIGNED RESERVED 59",
+	[VEC_UNIMPEA]	= "UNASSIGNED RESERVED 60",
+	[VEC_UNIMPII]	= "UNASSIGNED RESERVED 61",
+	[VEC_RESV62]	= "UNASSIGNED RESERVED 62",
+	[VEC_RESV63]	= "UNASSIGNED RESERVED 63",
+};
+
+static const char *space_names[] = {
+	[0]		= "Space 0",
+	[USER_DATA]	= "User Data",
+	[USER_PROGRAM]	= "User Program",
+#ifndef CONFIG_SUN3
+	[3]		= "Space 3",
+#else
+	[FC_CONTROL]	= "Control",
+#endif
+	[4]		= "Space 4",
+	[SUPER_DATA]	= "Super Data",
+	[SUPER_PROGRAM]	= "Super Program",
+	[CPU_SPACE]	= "CPU"
+};
+
+void die_if_kernel(char *,struct pt_regs *,int);
+asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address,
+                             unsigned long error_code);
+int send_fault_sig(struct pt_regs *regs);
+
+asmlinkage void trap_c(struct frame *fp);
+
+#if defined (CONFIG_M68060)
+static inline void access_error060 (struct frame *fp)
+{
+	unsigned long fslw = fp->un.fmt4.pc; /* is really FSLW for access error */
+
+#ifdef DEBUG
+	printk("fslw=%#lx, fa=%#lx\n", fslw, fp->un.fmt4.effaddr);
+#endif
+
+	if (fslw & MMU060_BPE) {
+		/* branch prediction error -> clear branch cache */
+		__asm__ __volatile__ ("movec %/cacr,%/d0\n\t"
+				      "orl   #0x00400000,%/d0\n\t"
+				      "movec %/d0,%/cacr"
+				      : : : "d0" );
+		/* return if there's no other error */
+		if (!(fslw & MMU060_ERR_BITS) && !(fslw & MMU060_SEE))
+			return;
+	}
+
+	if (fslw & (MMU060_DESC_ERR | MMU060_WP | MMU060_SP)) {
+		unsigned long errorcode;
+		unsigned long addr = fp->un.fmt4.effaddr;
+
+		if (fslw & MMU060_MA)
+			addr = (addr + PAGE_SIZE - 1) & PAGE_MASK;
+
+		errorcode = 1;
+		if (fslw & MMU060_DESC_ERR) {
+			__flush_tlb040_one(addr);
+			errorcode = 0;
+		}
+		if (fslw & MMU060_W)
+			errorcode |= 2;
+#ifdef DEBUG
+		printk("errorcode = %d\n", errorcode );
+#endif
+		do_page_fault(&fp->ptregs, addr, errorcode);
+	} else if (fslw & (MMU060_SEE)){
+		/* Software Emulation Error.
+		 * fault during mem_read/mem_write in ifpsp060/os.S
+		 */
+		send_fault_sig(&fp->ptregs);
+	} else if (!(fslw & (MMU060_RE|MMU060_WE)) ||
+		   send_fault_sig(&fp->ptregs) > 0) {
+		printk("pc=%#lx, fa=%#lx\n", fp->ptregs.pc, fp->un.fmt4.effaddr);
+		printk( "68060 access error, fslw=%lx\n", fslw );
+		trap_c( fp );
+	}
+}
+#endif /* CONFIG_M68060 */
+
+#if defined (CONFIG_M68040)
+static inline unsigned long probe040(int iswrite, unsigned long addr, int wbs)
+{
+	unsigned long mmusr;
+	mm_segment_t old_fs = get_fs();
+
+	set_fs(MAKE_MM_SEG(wbs));
+
+	if (iswrite)
+		asm volatile (".chip 68040; ptestw (%0); .chip 68k" : : "a" (addr));
+	else
+		asm volatile (".chip 68040; ptestr (%0); .chip 68k" : : "a" (addr));
+
+	asm volatile (".chip 68040; movec %%mmusr,%0; .chip 68k" : "=r" (mmusr));
+
+	set_fs(old_fs);
+
+	return mmusr;
+}
+
+static inline int do_040writeback1(unsigned short wbs, unsigned long wba,
+				   unsigned long wbd)
+{
+	int res = 0;
+	mm_segment_t old_fs = get_fs();
+
+	/* set_fs can not be moved, otherwise put_user() may oops */
+	set_fs(MAKE_MM_SEG(wbs));
+
+	switch (wbs & WBSIZ_040) {
+	case BA_SIZE_BYTE:
+		res = put_user(wbd & 0xff, (char __user *)wba);
+		break;
+	case BA_SIZE_WORD:
+		res = put_user(wbd & 0xffff, (short __user *)wba);
+		break;
+	case BA_SIZE_LONG:
+		res = put_user(wbd, (int __user *)wba);
+		break;
+	}
+
+	/* set_fs can not be moved, otherwise put_user() may oops */
+	set_fs(old_fs);
+
+
+#ifdef DEBUG
+	printk("do_040writeback1, res=%d\n",res);
+#endif
+
+	return res;
+}
+
+/* after an exception in a writeback the stack frame corresponding
+ * to that exception is discarded, set a few bits in the old frame
+ * to simulate what it should look like
+ */
+static inline void fix_xframe040(struct frame *fp, unsigned long wba, unsigned short wbs)
+{
+	fp->un.fmt7.faddr = wba;
+	fp->un.fmt7.ssw = wbs & 0xff;
+	if (wba != current->thread.faddr)
+	    fp->un.fmt7.ssw |= MA_040;
+}
+
+static inline void do_040writebacks(struct frame *fp)
+{
+	int res = 0;
+#if 0
+	if (fp->un.fmt7.wb1s & WBV_040)
+		printk("access_error040: cannot handle 1st writeback. oops.\n");
+#endif
+
+	if ((fp->un.fmt7.wb2s & WBV_040) &&
+	    !(fp->un.fmt7.wb2s & WBTT_040)) {
+		res = do_040writeback1(fp->un.fmt7.wb2s, fp->un.fmt7.wb2a,
+				       fp->un.fmt7.wb2d);
+		if (res)
+			fix_xframe040(fp, fp->un.fmt7.wb2a, fp->un.fmt7.wb2s);
+		else
+			fp->un.fmt7.wb2s = 0;
+	}
+
+	/* do the 2nd wb only if the first one was successful (except for a kernel wb) */
+	if (fp->un.fmt7.wb3s & WBV_040 && (!res || fp->un.fmt7.wb3s & 4)) {
+		res = do_040writeback1(fp->un.fmt7.wb3s, fp->un.fmt7.wb3a,
+				       fp->un.fmt7.wb3d);
+		if (res)
+		    {
+			fix_xframe040(fp, fp->un.fmt7.wb3a, fp->un.fmt7.wb3s);
+
+			fp->un.fmt7.wb2s = fp->un.fmt7.wb3s;
+			fp->un.fmt7.wb3s &= (~WBV_040);
+			fp->un.fmt7.wb2a = fp->un.fmt7.wb3a;
+			fp->un.fmt7.wb2d = fp->un.fmt7.wb3d;
+		    }
+		else
+			fp->un.fmt7.wb3s = 0;
+	}
+
+	if (res)
+		send_fault_sig(&fp->ptregs);
+}
+
+/*
+ * called from sigreturn(), must ensure userspace code didn't
+ * manipulate exception frame to circumvent protection, then complete
+ * pending writebacks
+ * we just clear TM2 to turn it into a userspace access
+ */
+asmlinkage void berr_040cleanup(struct frame *fp)
+{
+	fp->un.fmt7.wb2s &= ~4;
+	fp->un.fmt7.wb3s &= ~4;
+
+	do_040writebacks(fp);
+}
+
+static inline void access_error040(struct frame *fp)
+{
+	unsigned short ssw = fp->un.fmt7.ssw;
+	unsigned long mmusr;
+
+#ifdef DEBUG
+	printk("ssw=%#x, fa=%#lx\n", ssw, fp->un.fmt7.faddr);
+        printk("wb1s=%#x, wb2s=%#x, wb3s=%#x\n", fp->un.fmt7.wb1s,
+		fp->un.fmt7.wb2s, fp->un.fmt7.wb3s);
+	printk ("wb2a=%lx, wb3a=%lx, wb2d=%lx, wb3d=%lx\n",
+		fp->un.fmt7.wb2a, fp->un.fmt7.wb3a,
+		fp->un.fmt7.wb2d, fp->un.fmt7.wb3d);
+#endif
+
+	if (ssw & ATC_040) {
+		unsigned long addr = fp->un.fmt7.faddr;
+		unsigned long errorcode;
+
+		/*
+		 * The MMU status has to be determined AFTER the address
+		 * has been corrected if there was a misaligned access (MA).
+		 */
+		if (ssw & MA_040)
+			addr = (addr + 7) & -8;
+
+		/* MMU error, get the MMUSR info for this access */
+		mmusr = probe040(!(ssw & RW_040), addr, ssw);
+#ifdef DEBUG
+		printk("mmusr = %lx\n", mmusr);
+#endif
+		errorcode = 1;
+		if (!(mmusr & MMU_R_040)) {
+			/* clear the invalid atc entry */
+			__flush_tlb040_one(addr);
+			errorcode = 0;
+		}
+
+		/* despite what documentation seems to say, RMW
+		 * accesses have always both the LK and RW bits set */
+		if (!(ssw & RW_040) || (ssw & LK_040))
+			errorcode |= 2;
+
+		if (do_page_fault(&fp->ptregs, addr, errorcode)) {
+#ifdef DEBUG
+			printk("do_page_fault() !=0\n");
+#endif
+			if (user_mode(&fp->ptregs)){
+				/* delay writebacks after signal delivery */
+#ifdef DEBUG
+			        printk(".. was usermode - return\n");
+#endif
+				return;
+			}
+			/* disable writeback into user space from kernel
+			 * (if do_page_fault didn't fix the mapping,
+                         * the writeback won't do good)
+			 */
+disable_wb:
+#ifdef DEBUG
+			printk(".. disabling wb2\n");
+#endif
+			if (fp->un.fmt7.wb2a == fp->un.fmt7.faddr)
+				fp->un.fmt7.wb2s &= ~WBV_040;
+			if (fp->un.fmt7.wb3a == fp->un.fmt7.faddr)
+				fp->un.fmt7.wb3s &= ~WBV_040;
+		}
+	} else {
+		/* In case of a bus error we either kill the process or expect
+		 * the kernel to catch the fault, which then is also responsible
+		 * for cleaning up the mess.
+		 */
+		current->thread.signo = SIGBUS;
+		current->thread.faddr = fp->un.fmt7.faddr;
+		if (send_fault_sig(&fp->ptregs) >= 0)
+			printk("68040 bus error (ssw=%x, faddr=%lx)\n", ssw,
+			       fp->un.fmt7.faddr);
+		goto disable_wb;
+	}
+
+	do_040writebacks(fp);
+}
+#endif /* CONFIG_M68040 */
+
+#if defined(CONFIG_SUN3)
+#include <asm/sun3mmu.h>
+
+extern int mmu_emu_handle_fault (unsigned long, int, int);
+
+/* sun3 version of bus_error030 */
+
+static inline void bus_error030 (struct frame *fp)
+{
+	unsigned char buserr_type = sun3_get_buserr ();
+	unsigned long addr, errorcode;
+	unsigned short ssw = fp->un.fmtb.ssw;
+	extern unsigned long _sun3_map_test_start, _sun3_map_test_end;
+
+#ifdef DEBUG
+	if (ssw & (FC | FB))
+		printk ("Instruction fault at %#010lx\n",
+			ssw & FC ?
+			fp->ptregs.format == 0xa ? fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2
+			:
+			fp->ptregs.format == 0xa ? fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
+	if (ssw & DF)
+		printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n",
+			ssw & RW ? "read" : "write",
+			fp->un.fmtb.daddr,
+			space_names[ssw & DFC], fp->ptregs.pc);
+#endif
+
+	/*
+	 * Check if this page should be demand-mapped. This needs to go before
+	 * the testing for a bad kernel-space access (demand-mapping applies
+	 * to kernel accesses too).
+	 */
+
+	if ((ssw & DF)
+	    && (buserr_type & (SUN3_BUSERR_PROTERR | SUN3_BUSERR_INVALID))) {
+		if (mmu_emu_handle_fault (fp->un.fmtb.daddr, ssw & RW, 0))
+			return;
+	}
+
+	/* Check for kernel-space pagefault (BAD). */
+	if (fp->ptregs.sr & PS_S) {
+		/* kernel fault must be a data fault to user space */
+		if (! ((ssw & DF) && ((ssw & DFC) == USER_DATA))) {
+		     // try checking the kernel mappings before surrender
+		     if (mmu_emu_handle_fault (fp->un.fmtb.daddr, ssw & RW, 1))
+			  return;
+			/* instruction fault or kernel data fault! */
+			if (ssw & (FC | FB))
+				printk ("Instruction fault at %#010lx\n",
+					fp->ptregs.pc);
+			if (ssw & DF) {
+				/* was this fault incurred testing bus mappings? */
+				if((fp->ptregs.pc >= (unsigned long)&_sun3_map_test_start) &&
+				   (fp->ptregs.pc <= (unsigned long)&_sun3_map_test_end)) {
+					send_fault_sig(&fp->ptregs);
+					return;
+				}
+
+				printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n",
+					ssw & RW ? "read" : "write",
+					fp->un.fmtb.daddr,
+					space_names[ssw & DFC], fp->ptregs.pc);
+			}
+			printk ("BAD KERNEL BUSERR\n");
+
+			die_if_kernel("Oops", &fp->ptregs,0);
+			force_sig(SIGKILL, current);
+			return;
+		}
+	} else {
+		/* user fault */
+		if (!(ssw & (FC | FB)) && !(ssw & DF))
+			/* not an instruction fault or data fault! BAD */
+			panic ("USER BUSERR w/o instruction or data fault");
+	}
+
+
+	/* First handle the data fault, if any.  */
+	if (ssw & DF) {
+		addr = fp->un.fmtb.daddr;
+
+// errorcode bit 0:	0 -> no page		1 -> protection fault
+// errorcode bit 1:	0 -> read fault		1 -> write fault
+
+// (buserr_type & SUN3_BUSERR_PROTERR)	-> protection fault
+// (buserr_type & SUN3_BUSERR_INVALID)	-> invalid page fault
+
+		if (buserr_type & SUN3_BUSERR_PROTERR)
+			errorcode = 0x01;
+		else if (buserr_type & SUN3_BUSERR_INVALID)
+			errorcode = 0x00;
+		else {
+#ifdef DEBUG
+			printk ("*** unexpected busfault type=%#04x\n", buserr_type);
+			printk ("invalid %s access at %#lx from pc %#lx\n",
+				!(ssw & RW) ? "write" : "read", addr,
+				fp->ptregs.pc);
+#endif
+			die_if_kernel ("Oops", &fp->ptregs, buserr_type);
+			force_sig (SIGBUS, current);
+			return;
+		}
+
+//todo: wtf is RM bit? --m
+		if (!(ssw & RW) || ssw & RM)
+			errorcode |= 0x02;
+
+		/* Handle page fault. */
+		do_page_fault (&fp->ptregs, addr, errorcode);
+
+		/* Retry the data fault now. */
+		return;
+	}
+
+	/* Now handle the instruction fault. */
+
+	/* Get the fault address. */
+	if (fp->ptregs.format == 0xA)
+		addr = fp->ptregs.pc + 4;
+	else
+		addr = fp->un.fmtb.baddr;
+	if (ssw & FC)
+		addr -= 2;
+
+	if (buserr_type & SUN3_BUSERR_INVALID) {
+		if (!mmu_emu_handle_fault (fp->un.fmtb.daddr, 1, 0))
+			do_page_fault (&fp->ptregs, addr, 0);
+       } else {
+#ifdef DEBUG
+		printk ("protection fault on insn access (segv).\n");
+#endif
+		force_sig (SIGSEGV, current);
+       }
+}
+#else
+#if defined(CPU_M68020_OR_M68030)
+static inline void bus_error030 (struct frame *fp)
+{
+	volatile unsigned short temp;
+	unsigned short mmusr;
+	unsigned long addr, errorcode;
+	unsigned short ssw = fp->un.fmtb.ssw;
+#ifdef DEBUG
+	unsigned long desc;
+
+	printk ("pid = %x  ", current->pid);
+	printk ("SSW=%#06x  ", ssw);
+
+	if (ssw & (FC | FB))
+		printk ("Instruction fault at %#010lx\n",
+			ssw & FC ?
+			fp->ptregs.format == 0xa ? fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2
+			:
+			fp->ptregs.format == 0xa ? fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
+	if (ssw & DF)
+		printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n",
+			ssw & RW ? "read" : "write",
+			fp->un.fmtb.daddr,
+			space_names[ssw & DFC], fp->ptregs.pc);
+#endif
+
+	/* ++andreas: If a data fault and an instruction fault happen
+	   at the same time map in both pages.  */
+
+	/* First handle the data fault, if any.  */
+	if (ssw & DF) {
+		addr = fp->un.fmtb.daddr;
+
+#ifdef DEBUG
+		asm volatile ("ptestr %3,%2@,#7,%0\n\t"
+			      "pmove %%psr,%1@"
+			      : "=a&" (desc)
+			      : "a" (&temp), "a" (addr), "d" (ssw));
+#else
+		asm volatile ("ptestr %2,%1@,#7\n\t"
+			      "pmove %%psr,%0@"
+			      : : "a" (&temp), "a" (addr), "d" (ssw));
+#endif
+		mmusr = temp;
+
+#ifdef DEBUG
+		printk("mmusr is %#x for addr %#lx in task %p\n",
+		       mmusr, addr, current);
+		printk("descriptor address is %#lx, contents %#lx\n",
+		       __va(desc), *(unsigned long *)__va(desc));
+#endif
+
+		errorcode = (mmusr & MMU_I) ? 0 : 1;
+		if (!(ssw & RW) || (ssw & RM))
+			errorcode |= 2;
+
+		if (mmusr & (MMU_I | MMU_WP)) {
+			if (ssw & 4) {
+				printk("Data %s fault at %#010lx in %s (pc=%#lx)\n",
+				       ssw & RW ? "read" : "write",
+				       fp->un.fmtb.daddr,
+				       space_names[ssw & DFC], fp->ptregs.pc);
+				goto buserr;
+			}
+			/* Don't try to do anything further if an exception was
+			   handled. */
+			if (do_page_fault (&fp->ptregs, addr, errorcode) < 0)
+				return;
+		} else if (!(mmusr & MMU_I)) {
+			/* probably a 020 cas fault */
+			if (!(ssw & RM) && send_fault_sig(&fp->ptregs) > 0)
+				printk("unexpected bus error (%#x,%#x)\n", ssw, mmusr);
+		} else if (mmusr & (MMU_B|MMU_L|MMU_S)) {
+			printk("invalid %s access at %#lx from pc %#lx\n",
+			       !(ssw & RW) ? "write" : "read", addr,
+			       fp->ptregs.pc);
+			die_if_kernel("Oops",&fp->ptregs,mmusr);
+			force_sig(SIGSEGV, current);
+			return;
+		} else {
+#if 0
+			static volatile long tlong;
+#endif
+
+			printk("weird %s access at %#lx from pc %#lx (ssw is %#x)\n",
+			       !(ssw & RW) ? "write" : "read", addr,
+			       fp->ptregs.pc, ssw);
+			asm volatile ("ptestr #1,%1@,#0\n\t"
+				      "pmove %%psr,%0@"
+				      : /* no outputs */
+				      : "a" (&temp), "a" (addr));
+			mmusr = temp;
+
+			printk ("level 0 mmusr is %#x\n", mmusr);
+#if 0
+			asm volatile ("pmove %%tt0,%0@"
+				      : /* no outputs */
+				      : "a" (&tlong));
+			printk("tt0 is %#lx, ", tlong);
+			asm volatile ("pmove %%tt1,%0@"
+				      : /* no outputs */
+				      : "a" (&tlong));
+			printk("tt1 is %#lx\n", tlong);
+#endif
+#ifdef DEBUG
+			printk("Unknown SIGSEGV - 1\n");
+#endif
+			die_if_kernel("Oops",&fp->ptregs,mmusr);
+			force_sig(SIGSEGV, current);
+			return;
+		}
+
+		/* setup an ATC entry for the access about to be retried */
+		if (!(ssw & RW) || (ssw & RM))
+			asm volatile ("ploadw %1,%0@" : /* no outputs */
+				      : "a" (addr), "d" (ssw));
+		else
+			asm volatile ("ploadr %1,%0@" : /* no outputs */
+				      : "a" (addr), "d" (ssw));
+	}
+
+	/* Now handle the instruction fault. */
+
+	if (!(ssw & (FC|FB)))
+		return;
+
+	if (fp->ptregs.sr & PS_S) {
+		printk("Instruction fault at %#010lx\n",
+			fp->ptregs.pc);
+	buserr:
+		printk ("BAD KERNEL BUSERR\n");
+		die_if_kernel("Oops",&fp->ptregs,0);
+		force_sig(SIGKILL, current);
+		return;
+	}
+
+	/* get the fault address */
+	if (fp->ptregs.format == 10)
+		addr = fp->ptregs.pc + 4;
+	else
+		addr = fp->un.fmtb.baddr;
+	if (ssw & FC)
+		addr -= 2;
+
+	if ((ssw & DF) && ((addr ^ fp->un.fmtb.daddr) & PAGE_MASK) == 0)
+		/* Insn fault on same page as data fault.  But we
+		   should still create the ATC entry.  */
+		goto create_atc_entry;
+
+#ifdef DEBUG
+	asm volatile ("ptestr #1,%2@,#7,%0\n\t"
+		      "pmove %%psr,%1@"
+		      : "=a&" (desc)
+		      : "a" (&temp), "a" (addr));
+#else
+	asm volatile ("ptestr #1,%1@,#7\n\t"
+		      "pmove %%psr,%0@"
+		      : : "a" (&temp), "a" (addr));
+#endif
+	mmusr = temp;
+
+#ifdef DEBUG
+	printk ("mmusr is %#x for addr %#lx in task %p\n",
+		mmusr, addr, current);
+	printk ("descriptor address is %#lx, contents %#lx\n",
+		__va(desc), *(unsigned long *)__va(desc));
+#endif
+
+	if (mmusr & MMU_I)
+		do_page_fault (&fp->ptregs, addr, 0);
+	else if (mmusr & (MMU_B|MMU_L|MMU_S)) {
+		printk ("invalid insn access at %#lx from pc %#lx\n",
+			addr, fp->ptregs.pc);
+#ifdef DEBUG
+		printk("Unknown SIGSEGV - 2\n");
+#endif
+		die_if_kernel("Oops",&fp->ptregs,mmusr);
+		force_sig(SIGSEGV, current);
+		return;
+	}
+
+create_atc_entry:
+	/* setup an ATC entry for the access about to be retried */
+	asm volatile ("ploadr #2,%0@" : /* no outputs */
+		      : "a" (addr));
+}
+#endif /* CPU_M68020_OR_M68030 */
+#endif /* !CONFIG_SUN3 */
+
+asmlinkage void buserr_c(struct frame *fp)
+{
+	/* Only set esp0 if coming from user mode */
+	if (user_mode(&fp->ptregs))
+		current->thread.esp0 = (unsigned long) fp;
+
+#ifdef DEBUG
+	printk ("*** Bus Error *** Format is %x\n", fp->ptregs.format);
+#endif
+
+	switch (fp->ptregs.format) {
+#if defined (CONFIG_M68060)
+	case 4:				/* 68060 access error */
+	  access_error060 (fp);
+	  break;
+#endif
+#if defined (CONFIG_M68040)
+	case 0x7:			/* 68040 access error */
+	  access_error040 (fp);
+	  break;
+#endif
+#if defined (CPU_M68020_OR_M68030)
+	case 0xa:
+	case 0xb:
+	  bus_error030 (fp);
+	  break;
+#endif
+	default:
+	  die_if_kernel("bad frame format",&fp->ptregs,0);
+#ifdef DEBUG
+	  printk("Unknown SIGSEGV - 4\n");
+#endif
+	  force_sig(SIGSEGV, current);
+	}
+}
+
+
+static int kstack_depth_to_print = 48;
+
+void show_trace(unsigned long *stack)
+{
+	unsigned long *endstack;
+	unsigned long addr;
+	int i;
+
+	printk("Call Trace:");
+	addr = (unsigned long)stack + THREAD_SIZE - 1;
+	endstack = (unsigned long *)(addr & -THREAD_SIZE);
+	i = 0;
+	while (stack + 1 <= endstack) {
+		addr = *stack++;
+		/*
+		 * If the address is either in the text segment of the
+		 * kernel, or in the region which contains vmalloc'ed
+		 * memory, it *may* be the address of a calling
+		 * routine; if so, print it so that someone tracing
+		 * down the cause of the crash will be able to figure
+		 * out the call path that was taken.
+		 */
+		if (__kernel_text_address(addr)) {
+#ifndef CONFIG_KALLSYMS
+			if (i % 5 == 0)
+				printk("\n       ");
+#endif
+			printk(" [<%08lx>] %pS\n", addr, (void *)addr);
+			i++;
+		}
+	}
+	printk("\n");
+}
+
+void show_registers(struct pt_regs *regs)
+{
+	struct frame *fp = (struct frame *)regs;
+	mm_segment_t old_fs = get_fs();
+	u16 c, *cp;
+	unsigned long addr;
+	int i;
+
+	print_modules();
+	printk("PC: [<%08lx>] %pS\n", regs->pc, (void *)regs->pc);
+	printk("SR: %04x  SP: %p  a2: %08lx\n", regs->sr, regs, regs->a2);
+	printk("d0: %08lx    d1: %08lx    d2: %08lx    d3: %08lx\n",
+	       regs->d0, regs->d1, regs->d2, regs->d3);
+	printk("d4: %08lx    d5: %08lx    a0: %08lx    a1: %08lx\n",
+	       regs->d4, regs->d5, regs->a0, regs->a1);
+
+	printk("Process %s (pid: %d, task=%p)\n",
+		current->comm, task_pid_nr(current), current);
+	addr = (unsigned long)&fp->un;
+	printk("Frame format=%X ", regs->format);
+	switch (regs->format) {
+	case 0x2:
+		printk("instr addr=%08lx\n", fp->un.fmt2.iaddr);
+		addr += sizeof(fp->un.fmt2);
+		break;
+	case 0x3:
+		printk("eff addr=%08lx\n", fp->un.fmt3.effaddr);
+		addr += sizeof(fp->un.fmt3);
+		break;
+	case 0x4:
+		printk((CPU_IS_060 ? "fault addr=%08lx fslw=%08lx\n"
+			: "eff addr=%08lx pc=%08lx\n"),
+			fp->un.fmt4.effaddr, fp->un.fmt4.pc);
+		addr += sizeof(fp->un.fmt4);
+		break;
+	case 0x7:
+		printk("eff addr=%08lx ssw=%04x faddr=%08lx\n",
+			fp->un.fmt7.effaddr, fp->un.fmt7.ssw, fp->un.fmt7.faddr);
+		printk("wb 1 stat/addr/data: %04x %08lx %08lx\n",
+			fp->un.fmt7.wb1s, fp->un.fmt7.wb1a, fp->un.fmt7.wb1dpd0);
+		printk("wb 2 stat/addr/data: %04x %08lx %08lx\n",
+			fp->un.fmt7.wb2s, fp->un.fmt7.wb2a, fp->un.fmt7.wb2d);
+		printk("wb 3 stat/addr/data: %04x %08lx %08lx\n",
+			fp->un.fmt7.wb3s, fp->un.fmt7.wb3a, fp->un.fmt7.wb3d);
+		printk("push data: %08lx %08lx %08lx %08lx\n",
+			fp->un.fmt7.wb1dpd0, fp->un.fmt7.pd1, fp->un.fmt7.pd2,
+			fp->un.fmt7.pd3);
+		addr += sizeof(fp->un.fmt7);
+		break;
+	case 0x9:
+		printk("instr addr=%08lx\n", fp->un.fmt9.iaddr);
+		addr += sizeof(fp->un.fmt9);
+		break;
+	case 0xa:
+		printk("ssw=%04x isc=%04x isb=%04x daddr=%08lx dobuf=%08lx\n",
+			fp->un.fmta.ssw, fp->un.fmta.isc, fp->un.fmta.isb,
+			fp->un.fmta.daddr, fp->un.fmta.dobuf);
+		addr += sizeof(fp->un.fmta);
+		break;
+	case 0xb:
+		printk("ssw=%04x isc=%04x isb=%04x daddr=%08lx dobuf=%08lx\n",
+			fp->un.fmtb.ssw, fp->un.fmtb.isc, fp->un.fmtb.isb,
+			fp->un.fmtb.daddr, fp->un.fmtb.dobuf);
+		printk("baddr=%08lx dibuf=%08lx ver=%x\n",
+			fp->un.fmtb.baddr, fp->un.fmtb.dibuf, fp->un.fmtb.ver);
+		addr += sizeof(fp->un.fmtb);
+		break;
+	default:
+		printk("\n");
+	}
+	show_stack(NULL, (unsigned long *)addr);
+
+	printk("Code:");
+	set_fs(KERNEL_DS);
+	cp = (u16 *)regs->pc;
+	for (i = -8; i < 16; i++) {
+		if (get_user(c, cp + i) && i >= 0) {
+			printk(" Bad PC value.");
+			break;
+		}
+		printk(i ? " %04x" : " <%04x>", c);
+	}
+	set_fs(old_fs);
+	printk ("\n");
+}
+
+void show_stack(struct task_struct *task, unsigned long *stack)
+{
+	unsigned long *p;
+	unsigned long *endstack;
+	int i;
+
+	if (!stack) {
+		if (task)
+			stack = (unsigned long *)task->thread.esp0;
+		else
+			stack = (unsigned long *)&stack;
+	}
+	endstack = (unsigned long *)(((unsigned long)stack + THREAD_SIZE - 1) & -THREAD_SIZE);
+
+	printk("Stack from %08lx:", (unsigned long)stack);
+	p = stack;
+	for (i = 0; i < kstack_depth_to_print; i++) {
+		if (p + 1 > endstack)
+			break;
+		if (i % 8 == 0)
+			printk("\n       ");
+		printk(" %08lx", *p++);
+	}
+	printk("\n");
+	show_trace(stack);
+}
+
+/*
+ * The architecture-independent backtrace generator
+ */
+void dump_stack(void)
+{
+	unsigned long stack;
+
+	show_trace(&stack);
+}
+
+EXPORT_SYMBOL(dump_stack);
+
+void bad_super_trap (struct frame *fp)
+{
+	console_verbose();
+	if (fp->ptregs.vector < 4 * ARRAY_SIZE(vec_names))
+		printk ("*** %s ***   FORMAT=%X\n",
+			vec_names[(fp->ptregs.vector) >> 2],
+			fp->ptregs.format);
+	else
+		printk ("*** Exception %d ***   FORMAT=%X\n",
+			(fp->ptregs.vector) >> 2,
+			fp->ptregs.format);
+	if (fp->ptregs.vector >> 2 == VEC_ADDRERR && CPU_IS_020_OR_030) {
+		unsigned short ssw = fp->un.fmtb.ssw;
+
+		printk ("SSW=%#06x  ", ssw);
+
+		if (ssw & RC)
+			printk ("Pipe stage C instruction fault at %#010lx\n",
+				(fp->ptregs.format) == 0xA ?
+				fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2);
+		if (ssw & RB)
+			printk ("Pipe stage B instruction fault at %#010lx\n",
+				(fp->ptregs.format) == 0xA ?
+				fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
+		if (ssw & DF)
+			printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n",
+				ssw & RW ? "read" : "write",
+				fp->un.fmtb.daddr, space_names[ssw & DFC],
+				fp->ptregs.pc);
+	}
+	printk ("Current process id is %d\n", task_pid_nr(current));
+	die_if_kernel("BAD KERNEL TRAP", &fp->ptregs, 0);
+}
+
+asmlinkage void trap_c(struct frame *fp)
+{
+	int sig;
+	siginfo_t info;
+
+	if (fp->ptregs.sr & PS_S) {
+		if (fp->ptregs.vector == VEC_TRACE << 2) {
+			/* traced a trapping instruction on a 68020/30,
+			 * real exception will be executed afterwards.
+			 */
+		} else if (!handle_kernel_fault(&fp->ptregs))
+			bad_super_trap(fp);
+		return;
+	}
+
+	/* send the appropriate signal to the user program */
+	switch ((fp->ptregs.vector) >> 2) {
+	    case VEC_ADDRERR:
+		info.si_code = BUS_ADRALN;
+		sig = SIGBUS;
+		break;
+	    case VEC_ILLEGAL:
+	    case VEC_LINE10:
+	    case VEC_LINE11:
+		info.si_code = ILL_ILLOPC;
+		sig = SIGILL;
+		break;
+	    case VEC_PRIV:
+		info.si_code = ILL_PRVOPC;
+		sig = SIGILL;
+		break;
+	    case VEC_COPROC:
+		info.si_code = ILL_COPROC;
+		sig = SIGILL;
+		break;
+	    case VEC_TRAP1:
+	    case VEC_TRAP2:
+	    case VEC_TRAP3:
+	    case VEC_TRAP4:
+	    case VEC_TRAP5:
+	    case VEC_TRAP6:
+	    case VEC_TRAP7:
+	    case VEC_TRAP8:
+	    case VEC_TRAP9:
+	    case VEC_TRAP10:
+	    case VEC_TRAP11:
+	    case VEC_TRAP12:
+	    case VEC_TRAP13:
+	    case VEC_TRAP14:
+		info.si_code = ILL_ILLTRP;
+		sig = SIGILL;
+		break;
+	    case VEC_FPBRUC:
+	    case VEC_FPOE:
+	    case VEC_FPNAN:
+		info.si_code = FPE_FLTINV;
+		sig = SIGFPE;
+		break;
+	    case VEC_FPIR:
+		info.si_code = FPE_FLTRES;
+		sig = SIGFPE;
+		break;
+	    case VEC_FPDIVZ:
+		info.si_code = FPE_FLTDIV;
+		sig = SIGFPE;
+		break;
+	    case VEC_FPUNDER:
+		info.si_code = FPE_FLTUND;
+		sig = SIGFPE;
+		break;
+	    case VEC_FPOVER:
+		info.si_code = FPE_FLTOVF;
+		sig = SIGFPE;
+		break;
+	    case VEC_ZERODIV:
+		info.si_code = FPE_INTDIV;
+		sig = SIGFPE;
+		break;
+	    case VEC_CHK:
+	    case VEC_TRAP:
+		info.si_code = FPE_INTOVF;
+		sig = SIGFPE;
+		break;
+	    case VEC_TRACE:		/* ptrace single step */
+		info.si_code = TRAP_TRACE;
+		sig = SIGTRAP;
+		break;
+	    case VEC_TRAP15:		/* breakpoint */
+		info.si_code = TRAP_BRKPT;
+		sig = SIGTRAP;
+		break;
+	    default:
+		info.si_code = ILL_ILLOPC;
+		sig = SIGILL;
+		break;
+	}
+	info.si_signo = sig;
+	info.si_errno = 0;
+	switch (fp->ptregs.format) {
+	    default:
+		info.si_addr = (void *) fp->ptregs.pc;
+		break;
+	    case 2:
+		info.si_addr = (void *) fp->un.fmt2.iaddr;
+		break;
+	    case 7:
+		info.si_addr = (void *) fp->un.fmt7.effaddr;
+		break;
+	    case 9:
+		info.si_addr = (void *) fp->un.fmt9.iaddr;
+		break;
+	    case 10:
+		info.si_addr = (void *) fp->un.fmta.daddr;
+		break;
+	    case 11:
+		info.si_addr = (void *) fp->un.fmtb.daddr;
+		break;
+	}
+	force_sig_info (sig, &info, current);
+}
+
+void die_if_kernel (char *str, struct pt_regs *fp, int nr)
+{
+	if (!(fp->sr & PS_S))
+		return;
+
+	console_verbose();
+	printk("%s: %08x\n",str,nr);
+	show_registers(fp);
+	add_taint(TAINT_DIE);
+	do_exit(SIGSEGV);
+}
+
+/*
+ * This function is called if an error occur while accessing
+ * user-space from the fpsp040 code.
+ */
+asmlinkage void fpsp040_die(void)
+{
+	do_exit(SIGSEGV);
+}
+
+#ifdef CONFIG_M68KFPU_EMU
+asmlinkage void fpemu_signal(int signal, int code, void *addr)
+{
+	siginfo_t info;
+
+	info.si_signo = signal;
+	info.si_errno = 0;
+	info.si_code = code;
+	info.si_addr = addr;
+	force_sig_info(signal, &info, current);
+}
+#endif

arch/m68k/kernel/vmlinux.lds.S

···
-PHDRS
-{
-  text PT_LOAD FILEHDR PHDRS FLAGS (7);
-  data PT_LOAD FLAGS (7);
-}
-#ifdef CONFIG_SUN3
-#include "vmlinux-sun3.lds"
+#ifdef CONFIG_MMU
+#include "vmlinux.lds_mm.S"
 #else
-#include "vmlinux-std.lds"
+#include "vmlinux.lds_no.S"
 #endif

arch/m68k/kernel/vmlinux.lds_mm.S

···
+PHDRS
+{
+  text PT_LOAD FILEHDR PHDRS FLAGS (7);
+  data PT_LOAD FLAGS (7);
+}
+#ifdef CONFIG_SUN3
+#include "vmlinux-sun3.lds"
+#else
+#include "vmlinux-std.lds"
+#endif

arch/m68k/lib/Makefile

···
-#
-# Makefile for m68k-specific library files..
-#
-
-lib-y	:= ashldi3.o ashrdi3.o lshrdi3.o muldi3.o \
-	   checksum.o string.o uaccess.o
+ifdef CONFIG_MMU
+include arch/m68k/lib/Makefile_mm
+else
+include arch/m68k/lib/Makefile_no
+endif

arch/m68k/lib/Makefile_mm

···
+#
+# Makefile for m68k-specific library files..
+#
+
+lib-y	:= ashldi3.o ashrdi3.o lshrdi3.o muldi3.o \
+	   checksum.o string.o uaccess.o

arch/m68k/lib/checksum.c

···
-/*
- * INET		An implementation of the TCP/IP protocol suite for the LINUX
- *		operating system.  INET is implemented using the  BSD Socket
- *		interface as the means of communication with the user level.
- *
- *		IP/TCP/UDP checksumming routines
- *
- * Authors:	Jorge Cwik, <[e-mail]>
- *		Arnt Gulbrandsen, <[e-mail]>
- *		Tom May, <[e-mail]>
- *		Andreas Schwab, <[e-mail]>
- *		Lots of code moved from tcp.c and ip.c; see those files
- *		for more names.
- *
- * 03/02/96	Jes Sorensen, Andreas Schwab, Roman Hodek:
- *		Fixed some nasty bugs, causing some horrible crashes.
- *		A: At some points, the sum (%0) was used as
- *		length-counter instead of the length counter
- *		(%1). Thanks to Roman Hodek for pointing this out.
- *		B: GCC seems to mess up if one uses too many
- *		data-registers to hold input values and one tries to
- *		specify d0 and d1 as scratch registers. Letting gcc
- *		choose these registers itself solves the problem.
- *
- *		This program is free software; you can redistribute it and/or
- *		modify it under the terms of the GNU General Public License
- *		as published by the Free Software Foundation; either version
- *		2 of the License, or (at your option) any later version.
- *
- * 1998/8/31	Andreas Schwab:
- *		Zero out rest of buffer on exception in
- *		csum_partial_copy_from_user.
- */
-
-#include <linux/module.h>
-#include <net/checksum.h>
-
-/*
- * computes a partial checksum, e.g. for TCP/UDP fragments
- */
-
-__wsum csum_partial(const void *buff, int len, __wsum sum)
-{
-	unsigned long tmp1, tmp2;
-	  /*
-	   * Experiments with ethernet and slip connections show that buff
-	   * is aligned on either a 2-byte or 4-byte boundary.
-	   */
-	__asm__("movel %2,%3\n\t"
-		"btst #1,%3\n\t"	/* Check alignment */
-		"jeq 2f\n\t"
-		"subql #2,%1\n\t"	/* buff%4==2: treat first word */
-		"jgt 1f\n\t"
-		"addql #2,%1\n\t"	/* len was == 2, treat only rest */
-		"jra 4f\n"
-	     "1:\t"
-		"addw %2@+,%0\n\t"	/* add first word to sum */
-		"clrl %3\n\t"
-		"addxl %3,%0\n"		/* add X bit */
-	     "2:\t"
-		/* unrolled loop for the main part: do 8 longs at once */
-		"movel %1,%3\n\t"	/* save len in tmp1 */
-		"lsrl #5,%1\n\t"	/* len/32 */
-		"jeq 2f\n\t"		/* not enough... */
-		"subql #1,%1\n"
-	     "1:\t"
-		"movel %2@+,%4\n\t"
-		"addxl %4,%0\n\t"
-		"movel %2@+,%4\n\t"
-		"addxl %4,%0\n\t"
-		"movel %2@+,%4\n\t"
-		"addxl %4,%0\n\t"
-		"movel %2@+,%4\n\t"
-		"addxl %4,%0\n\t"
-		"movel %2@+,%4\n\t"
-		"addxl %4,%0\n\t"
-		"movel %2@+,%4\n\t"
-		"addxl %4,%0\n\t"
-		"movel %2@+,%4\n\t"
-		"addxl %4,%0\n\t"
-		"movel %2@+,%4\n\t"
-		"addxl %4,%0\n\t"
-		"dbra %1,1b\n\t"
-		"clrl %4\n\t"
-		"addxl %4,%0\n\t"	/* add X bit */
-		"clrw %1\n\t"
-		"subql #1,%1\n\t"
-		"jcc 1b\n"
-	     "2:\t"
-		"movel %3,%1\n\t"	/* restore len from tmp1 */
-		"andw #0x1c,%3\n\t"	/* number of rest longs */
-		"jeq 4f\n\t"
-		"lsrw #2,%3\n\t"
-		"subqw #1,%3\n"
-	     "3:\t"
-		/* loop for rest longs */
-		"movel %2@+,%4\n\t"
-		"addxl %4,%0\n\t"
-		"dbra %3,3b\n\t"
-		"clrl %4\n\t"
-		"addxl %4,%0\n"		/* add X bit */
-	     "4:\t"
-		/* now check for rest bytes that do not fit into longs */
-		"andw #3,%1\n\t"
-		"jeq 7f\n\t"
-		"clrl %4\n\t"		/* clear tmp2 for rest bytes */
-		"subqw #2,%1\n\t"
-		"jlt 5f\n\t"
-		"movew %2@+,%4\n\t"	/* have rest >= 2: get word */
-		"swap %4\n\t"		/* into bits 16..31 */
-		"tstw %1\n\t"		/* another byte? */
-		"jeq 6f\n"
-	     "5:\t"
-		"moveb %2@,%4\n\t"	/* have odd rest: get byte */
-		"lslw #8,%4\n\t"	/* into bits 8..15; 16..31 untouched */
-	     "6:\t"
-		"addl %4,%0\n\t"	/* now add rest long to sum */
-		"clrl %4\n\t"
-		"addxl %4,%0\n"		/* add X bit */
-	     "7:\t"
-		: "=d" (sum), "=d" (len), "=a" (buff),
-		  "=&d" (tmp1), "=&d" (tmp2)
-		: "0" (sum), "1" (len), "2" (buff)
-	    );
-	return(sum);
-}
-
-EXPORT_SYMBOL(csum_partial);
-
-
-/*
- * copy from user space while checksumming, with exception handling.
- */
-
-__wsum
-csum_partial_copy_from_user(const void __user *src, void *dst,
-			    int len, __wsum sum, int *csum_err)
-{
-	/*
-	 * GCC doesn't like more than 10 operands for the asm
-	 * statements so we have to use tmp2 for the error
-	 * code.
-	 */
-	unsigned long tmp1, tmp2;
-
-	__asm__("movel %2,%4\n\t"
-		"btst #1,%4\n\t"	/* Check alignment */
-		"jeq 2f\n\t"
-		"subql #2,%1\n\t"	/* buff%4==2: treat first word */
-		"jgt 1f\n\t"
-		"addql #2,%1\n\t"	/* len was == 2, treat only rest */
-		"jra 4f\n"
-	     "1:\n"
-	     "10:\t"
-		"movesw %2@+,%4\n\t"	/* add first word to sum */
-		"addw %4,%0\n\t"
-		"movew %4,%3@+\n\t"
-		"clrl %4\n\t"
-		"addxl %4,%0\n"		/* add X bit */
-	     "2:\t"
-		/* unrolled loop for the main part: do 8 longs at once */
-		"movel %1,%4\n\t"	/* save len in tmp1 */
-		"lsrl #5,%1\n\t"	/* len/32 */
-		"jeq 2f\n\t"		/* not enough... */
-		"subql #1,%1\n"
-	     "1:\n"
-	     "11:\t"
-		"movesl %2@+,%5\n\t"
-		"addxl %5,%0\n\t"
-		"movel %5,%3@+\n\t"
-	     "12:\t"
-		"movesl %2@+,%5\n\t"
-		"addxl %5,%0\n\t"
-		"movel %5,%3@+\n\t"
-	     "13:\t"
-		"movesl %2@+,%5\n\t"
-		"addxl %5,%0\n\t"
-		"movel %5,%3@+\n\t"
-	     "14:\t"
-		"movesl %2@+,%5\n\t"
-		"addxl %5,%0\n\t"
-		"movel %5,%3@+\n\t"
-	     "15:\t"
-		"movesl %2@+,%5\n\t"
-		"addxl %5,%0\n\t"
-		"movel %5,%3@+\n\t"
-	     "16:\t"
-		"movesl %2@+,%5\n\t"
-		"addxl %5,%0\n\t"
-		"movel %5,%3@+\n\t"
-	     "17:\t"
-		"movesl %2@+,%5\n\t"
-		"addxl %5,%0\n\t"
-		"movel %5,%3@+\n\t"
-	     "18:\t"
-		"movesl %2@+,%5\n\t"
-		"addxl %5,%0\n\t"
-		"movel %5,%3@+\n\t"
-		"dbra %1,1b\n\t"
-		"clrl %5\n\t"
-		"addxl %5,%0\n\t"	/* add X bit */
-		"clrw %1\n\t"
-		"subql #1,%1\n\t"
-		"jcc 1b\n"
-	     "2:\t"
-		"movel %4,%1\n\t"	/* restore len from tmp1 */
-		"andw #0x1c,%4\n\t"	/* number of rest longs */
-		"jeq 4f\n\t"
-		"lsrw #2,%4\n\t"
-		"subqw #1,%4\n"
-	     "3:\n"
-		/* loop for rest longs */
-	     "19:\t"
-		"movesl %2@+,%5\n\t"
-		"addxl %5,%0\n\t"
-		"movel %5,%3@+\n\t"
-		"dbra %4,3b\n\t"
-		"clrl %5\n\t"
-		"addxl %5,%0\n"		/* add X bit */
-	     "4:\t"
-		/* now check for rest bytes that do not fit into longs */
-		"andw #3,%1\n\t"
-		"jeq 7f\n\t"
-		"clrl %5\n\t"		/* clear tmp2 for rest bytes */
-		"subqw #2,%1\n\t"
-		"jlt 5f\n\t"
-	     "20:\t"
-		"movesw %2@+,%5\n\t"	/* have rest >= 2: get word */
-		"movew %5,%3@+\n\t"
-		"swap %5\n\t"		/* into bits 16..31 */
-		"tstw %1\n\t"		/* another byte? */
-		"jeq 6f\n"
-	     "5:\n"
-	     "21:\t"
-		"movesb %2@,%5\n\t"	/* have odd rest: get byte */
-		"moveb %5,%3@+\n\t"
-		"lslw #8,%5\n\t"	/* into bits 8..15; 16..31 untouched */
-	     "6:\t"
-		"addl %5,%0\n\t"	/* now add rest long to sum */
-		"clrl %5\n\t"
-		"addxl %5,%0\n\t"	/* add X bit */
-	     "7:\t"
-		"clrl %5\n"		/* no error - clear return value */
-	     "8:\n"
-		".section .fixup,\"ax\"\n"
-		".even\n"
-		/* If any exception occurs zero out the rest.
-		   Similarities with the code above are intentional :-) */
-	     "90:\t"
-		"clrw %3@+\n\t"
-		"movel %1,%4\n\t"
-		"lsrl #5,%1\n\t"
-		"jeq 1f\n\t"
-		"subql #1,%1\n"
-	     "91:\t"
-		"clrl %3@+\n"
-	     "92:\t"
-		"clrl %3@+\n"
-	     "93:\t"
-		"clrl %3@+\n"
-	     "94:\t"
-		"clrl %3@+\n"
-	     "95:\t"
-		"clrl %3@+\n"
-	     "96:\t"
-		"clrl %3@+\n"
-	     "97:\t"
-		"clrl %3@+\n"
-	     "98:\t"
-		"clrl %3@+\n\t"
-		"dbra %1,91b\n\t"
-		"clrw %1\n\t"
-		"subql #1,%1\n\t"
-		"jcc 91b\n"
-	     "1:\t"
-		"movel %4,%1\n\t"
-		"andw #0x1c,%4\n\t"
-		"jeq 1f\n\t"
-		"lsrw #2,%4\n\t"
-		"subqw #1,%4\n"
-	     "99:\t"
-		"clrl %3@+\n\t"
-		"dbra %4,99b\n\t"
-	     "1:\t"
-		"andw #3,%1\n\t"
-		"jeq 9f\n"
-	     "100:\t"
-		"clrw %3@+\n\t"
-		"tstw %1\n\t"
-		"jeq 9f\n"
-	     "101:\t"
-		"clrb %3@+\n"
-	     "9:\t"
-#define STR(X) STR1(X)
-#define STR1(X) #X
-		"moveq #-" STR(EFAULT) ",%5\n\t"
-		"jra 8b\n"
-		".previous\n"
-		".section __ex_table,\"a\"\n"
-		".long 10b,90b\n"
-		".long 11b,91b\n"
-		".long 12b,92b\n"
-		".long 13b,93b\n"
-		".long 14b,94b\n"
-		".long 15b,95b\n"
-		".long 16b,96b\n"
-		".long 17b,97b\n"
-		".long 18b,98b\n"
-		".long 19b,99b\n"
-		".long 20b,100b\n"
-		".long 21b,101b\n"
-		".previous"
-		: "=d" (sum), "=d" (len), "=a" (src), "=a" (dst),
-		  "=&d" (tmp1), "=d" (tmp2)
-		: "0" (sum), "1" (len), "2" (src), "3" (dst)
-	    );
-
-	*csum_err = tmp2;
-
-	return(sum);
-}
-
-EXPORT_SYMBOL(csum_partial_copy_from_user);
-
-
-/*
- * copy from kernel space while checksumming, otherwise like csum_partial
- */
-
-__wsum
-csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum)
-{
-	unsigned long tmp1, tmp2;
-	__asm__("movel %2,%4\n\t"
-		"btst #1,%4\n\t"	/* Check alignment */
-		"jeq 2f\n\t"
-		"subql #2,%1\n\t"	/* buff%4==2: treat first word */
-		"jgt 1f\n\t"
-		"addql #2,%1\n\t"	/* len was == 2, treat only rest */
-		"jra 4f\n"
-	     "1:\t"
-		"movew %2@+,%4\n\t"	/* add first word to sum */
-		"addw %4,%0\n\t"
-		"movew %4,%3@+\n\t"
-		"clrl %4\n\t"
-		"addxl %4,%0\n"		/* add X bit */
-	     "2:\t"
-		/* unrolled loop for the main part: do 8 longs at once */
-		"movel %1,%4\n\t"	/* save len in tmp1 */
-		"lsrl #5,%1\n\t"	/* len/32 */
-		"jeq 2f\n\t"		/* not enough... */
-		"subql #1,%1\n"
-	     "1:\t"
-		"movel %2@+,%5\n\t"
-		"addxl %5,%0\n\t"
-		"movel %5,%3@+\n\t"
-		"movel %2@+,%5\n\t"
-		"addxl %5,%0\n\t"
-		"movel %5,%3@+\n\t"
-		"movel %2@+,%5\n\t"
-		"addxl %5,%0\n\t"
-		"movel %5,%3@+\n\t"
-		"movel %2@+,%5\n\t"
-		"addxl %5,%0\n\t"
-		"movel %5,%3@+\n\t"
-		"movel %2@+,%5\n\t"
-		"addxl %5,%0\n\t"
-		"movel %5,%3@+\n\t"
-		"movel %2@+,%5\n\t"
-		"addxl %5,%0\n\t"
-		"movel %5,%3@+\n\t"
-		"movel %2@+,%5\n\t"
-		"addxl %5,%0\n\t"
-		"movel %5,%3@+\n\t"
-		"movel %2@+,%5\n\t"
-		"addxl %5,%0\n\t"
-		"movel %5,%3@+\n\t"
-		"dbra %1,1b\n\t"
-		"clrl %5\n\t"
-		"addxl %5,%0\n\t"	/* add X bit */
-		"clrw %1\n\t"
-		"subql #1,%1\n\t"
-		"jcc 1b\n"
-	     "2:\t"
-		"movel %4,%1\n\t"	/* restore len from tmp1 */
-		"andw #0x1c,%4\n\t"	/* number of rest longs */
-		"jeq 4f\n\t"
-		"lsrw #2,%4\n\t"
-		"subqw #1,%4\n"
-	     "3:\t"
-		/* loop for rest longs */
-		"movel %2@+,%5\n\t"
-		"addxl %5,%0\n\t"
-		"movel %5,%3@+\n\t"
-		"dbra %4,3b\n\t"
-		"clrl %5\n\t"
-		"addxl %5,%0\n"		/* add X bit */
-	     "4:\t"
-		/* now check for rest bytes that do not fit into longs */
-		"andw #3,%1\n\t"
-		"jeq 7f\n\t"
-		"clrl %5\n\t"		/* clear tmp2 for rest bytes */
-		"subqw #2,%1\n\t"
-		"jlt 5f\n\t"
-		"movew %2@+,%5\n\t"	/* have rest >= 2: get word */
-		"movew %5,%3@+\n\t"
-		"swap %5\n\t"		/* into bits 16..31 */
-		"tstw %1\n\t"		/* another byte? */
-		"jeq 6f\n"
-	     "5:\t"
-		"moveb %2@,%5\n\t"	/* have odd rest: get byte */
-		"moveb %5,%3@+\n\t"
-		"lslw #8,%5\n"		/* into bits 8..15; 16..31 untouched */
-	     "6:\t"
-		"addl %5,%0\n\t"	/* now add rest long to sum */
-		"clrl %5\n\t"
-		"addxl %5,%0\n"		/* add X bit */
-	     "7:\t"
-		: "=d" (sum), "=d" (len), "=a" (src), "=a" (dst),
-		  "=&d" (tmp1), "=&d" (tmp2)
-		: "0" (sum), "1" (len), "2" (src), "3" (dst)
-	    );
-    return(sum);
-}
-EXPORT_SYMBOL(csum_partial_copy_nocheck);
+#ifdef CONFIG_MMU
+#include "checksum_mm.c"
+#else
+#include "checksum_no.c"
+#endif

arch/m68k/lib/checksum_mm.c

···
+/*
+ * INET		An implementation of the TCP/IP protocol suite for the LINUX
+ *		operating system.  INET is implemented using the  BSD Socket
+ *		interface as the means of communication with the user level.
+ *
+ *		IP/TCP/UDP checksumming routines
+ *
+ * Authors:	Jorge Cwik, <[e-mail]>
+ *		Arnt Gulbrandsen, <[e-mail]>
+ *		Tom May, <[e-mail]>
+ *		Andreas Schwab, <[e-mail]>
+ *		Lots of code moved from tcp.c and ip.c; see those files
+ *		for more names.
+ *
+ * 03/02/96	Jes Sorensen, Andreas Schwab, Roman Hodek:
+ *		Fixed some nasty bugs, causing some horrible crashes.
+ *		A: At some points, the sum (%0) was used as
+ *		length-counter instead of the length counter
+ *		(%1). Thanks to Roman Hodek for pointing this out.
+ *		B: GCC seems to mess up if one uses too many
+ *		data-registers to hold input values and one tries to
+ *		specify d0 and d1 as scratch registers. Letting gcc
+ *		choose these registers itself solves the problem.
+ *
+ *		This program is free software; you can redistribute it and/or
+ *		modify it under the terms of the GNU General Public License
+ *		as published by the Free Software Foundation; either version
+ *		2 of the License, or (at your option) any later version.
+ *
+ * 1998/8/31	Andreas Schwab:
+ *		Zero out rest of buffer on exception in
+ *		csum_partial_copy_from_user.
+ */
+
+#include <linux/module.h>
+#include <net/checksum.h>
+
+/*
+ * computes a partial checksum, e.g. for TCP/UDP fragments
+ */
+
+__wsum csum_partial(const void *buff, int len, __wsum sum)
+{
+	unsigned long tmp1, tmp2;
+	  /*
+	   * Experiments with ethernet and slip connections show that buff
+	   * is aligned on either a 2-byte or 4-byte boundary.
+	   */
+	__asm__("movel %2,%3\n\t"
+		"btst #1,%3\n\t"	/* Check alignment */
+		"jeq 2f\n\t"
+		"subql #2,%1\n\t"	/* buff%4==2: treat first word */
+		"jgt 1f\n\t"
+		"addql #2,%1\n\t"	/* len was == 2, treat only rest */
+		"jra 4f\n"
+	     "1:\t"
+		"addw %2@+,%0\n\t"	/* add first word to sum */
+		"clrl %3\n\t"
+		"addxl %3,%0\n"		/* add X bit */
+	     "2:\t"
+		/* unrolled loop for the main part: do 8 longs at once */
+		"movel %1,%3\n\t"	/* save len in tmp1 */
+		"lsrl #5,%1\n\t"	/* len/32 */
+		"jeq 2f\n\t"		/* not enough... */
+		"subql #1,%1\n"
+	     "1:\t"
+		"movel %2@+,%4\n\t"
+		"addxl %4,%0\n\t"
+		"movel %2@+,%4\n\t"
+		"addxl %4,%0\n\t"
+		"movel %2@+,%4\n\t"
+		"addxl %4,%0\n\t"
+		"movel %2@+,%4\n\t"
+		"addxl %4,%0\n\t"
+		"movel %2@+,%4\n\t"
+		"addxl %4,%0\n\t"
+		"movel %2@+,%4\n\t"
+		"addxl %4,%0\n\t"
+		"movel %2@+,%4\n\t"
+		"addxl %4,%0\n\t"
+		"movel %2@+,%4\n\t"
+		"addxl %4,%0\n\t"
+		"dbra %1,1b\n\t"
+		"clrl %4\n\t"
+		"addxl %4,%0\n\t"	/* add X bit */
+		"clrw %1\n\t"
+		"subql #1,%1\n\t"
+		"jcc 1b\n"
+	     "2:\t"
+		"movel %3,%1\n\t"	/* restore len from tmp1 */
+		"andw #0x1c,%3\n\t"	/* number of rest longs */
+		"jeq 4f\n\t"
+		"lsrw #2,%3\n\t"
+		"subqw #1,%3\n"
+	     "3:\t"
+		/* loop for rest longs */
+		"movel %2@+,%4\n\t"
+		"addxl %4,%0\n\t"
+		"dbra %3,3b\n\t"
+		"clrl %4\n\t"
+		"addxl %4,%0\n"		/* add X bit */
+	     "4:\t"
+		/* now check for rest bytes that do not fit into longs */
+		"andw #3,%1\n\t"
+		"jeq 7f\n\t"
+		"clrl %4\n\t"		/* clear tmp2 for rest bytes */
+		"subqw #2,%1\n\t"
+		"jlt 5f\n\t"
+		"movew %2@+,%4\n\t"	/* have rest >= 2: get word */
+		"swap %4\n\t"		/* into bits 16..31 */
+		"tstw %1\n\t"		/* another byte? */
+		"jeq 6f\n"
+	     "5:\t"
+		"moveb %2@,%4\n\t"	/* have odd rest: get byte */
+		"lslw #8,%4\n\t"	/* into bits 8..15; 16..31 untouched */
+	     "6:\t"
+		"addl %4,%0\n\t"	/* now add rest long to sum */
+		"clrl %4\n\t"
+		"addxl %4,%0\n"		/* add X bit */
+	     "7:\t"
+		: "=d" (sum), "=d" (len), "=a" (buff),
+		  "=&d" (tmp1), "=&d" (tmp2)
+		: "0" (sum), "1" (len), "2" (buff)
+	    );
+	return(sum);
+}
+
+EXPORT_SYMBOL(csum_partial);
+
+
+/*
+ * copy from user space while checksumming, with exception handling.
+ */
+
+__wsum
+csum_partial_copy_from_user(const void __user *src, void *dst,
+			    int len, __wsum sum, int *csum_err)
+{
+	/*
+	 * GCC doesn't like more than 10 operands for the asm
+	 * statements so we have to use tmp2 for the error
+	 * code.
+	 */
+	unsigned long tmp1, tmp2;
+
+	__asm__("movel %2,%4\n\t"
+		"btst #1,%4\n\t"	/* Check alignment */
+		"jeq 2f\n\t"
+		"subql #2,%1\n\t"	/* buff%4==2: treat first word */
+		"jgt 1f\n\t"
+		"addql #2,%1\n\t"	/* len was == 2, treat only rest */
+		"jra 4f\n"
+	     "1:\n"
+	     "10:\t"
+		"movesw %2@+,%4\n\t"	/* add first word to sum */
+		"addw %4,%0\n\t"
+		"movew %4,%3@+\n\t"
+		"clrl %4\n\t"
+		"addxl %4,%0\n"		/* add X bit */
+	     "2:\t"
+		/* unrolled loop for the main part: do 8 longs at once */
+		"movel %1,%4\n\t"	/* save len in tmp1 */
+		"lsrl #5,%1\n\t"	/* len/32 */
+		"jeq 2f\n\t"		/* not enough... */
+		"subql #1,%1\n"
+	     "1:\n"
+	     "11:\t"
+		"movesl %2@+,%5\n\t"
+		"addxl %5,%0\n\t"
+		"movel %5,%3@+\n\t"
+	     "12:\t"
+		"movesl %2@+,%5\n\t"
+		"addxl %5,%0\n\t"
+		"movel %5,%3@+\n\t"
+	     "13:\t"
+		"movesl %2@+,%5\n\t"
+		"addxl %5,%0\n\t"
+		"movel %5,%3@+\n\t"
+	     "14:\t"
+		"movesl %2@+,%5\n\t"
+		"addxl %5,%0\n\t"
+		"movel %5,%3@+\n\t"
+	     "15:\t"
+		"movesl %2@+,%5\n\t"
+		"addxl %5,%0\n\t"
+		"movel %5,%3@+\n\t"
+	     "16:\t"
+		"movesl %2@+,%5\n\t"
+		"addxl %5,%0\n\t"
+		"movel %5,%3@+\n\t"
+	     "17:\t"
+		"movesl %2@+,%5\n\t"
+		"addxl %5,%0\n\t"
+		"movel %5,%3@+\n\t"
+	     "18:\t"
+		"movesl %2@+,%5\n\t"
+		"addxl %5,%0\n\t"
+		"movel %5,%3@+\n\t"
+		"dbra %1,1b\n\t"
+		"clrl %5\n\t"
+		"addxl %5,%0\n\t"	/* add X bit */
+		"clrw %1\n\t"
+		"subql #1,%1\n\t"
+		"jcc 1b\n"
+	     "2:\t"
+		"movel %4,%1\n\t"	/* restore len from tmp1 */
+		"andw #0x1c,%4\n\t"	/* number of rest longs */
+		"jeq 4f\n\t"
+		"lsrw #2,%4\n\t"
+		"subqw #1,%4\n"
+	     "3:\n"
+		/* loop for rest longs */
+	     "19:\t"
+		"movesl %2@+,%5\n\t"
+		"addxl %5,%0\n\t"
+		"movel %5,%3@+\n\t"
+		"dbra %4,3b\n\t"
+		"clrl %5\n\t"
+		"addxl %5,%0\n"		/* add X bit */
+	     "4:\t"
+		/* now check for rest bytes that do not fit into longs */
+		"andw #3,%1\n\t"
+		"jeq 7f\n\t"
+		"clrl %5\n\t"		/* clear tmp2 for rest bytes */
+		"subqw #2,%1\n\t"
+		"jlt 5f\n\t"
+	     "20:\t"
+		"movesw %2@+,%5\n\t"	/* have rest >= 2: get word */
+		"movew %5,%3@+\n\t"
+		"swap %5\n\t"		/* into bits 16..31 */
+		"tstw %1\n\t"		/* another byte? */
+		"jeq 6f\n"
+	     "5:\n"
+	     "21:\t"
+		"movesb %2@,%5\n\t"	/* have odd rest: get byte */
+		"moveb %5,%3@+\n\t"
+		"lslw #8,%5\n\t"	/* into bits 8..15; 16..31 untouched */
+	     "6:\t"
+		"addl %5,%0\n\t"	/* now add rest long to sum */
+		"clrl %5\n\t"
+		"addxl %5,%0\n\t"	/* add X bit */
+	     "7:\t"
+		"clrl %5\n"		/* no error - clear return value */
+	     "8:\n"
+		".section .fixup,\"ax\"\n"
+		".even\n"
+		/* If any exception occurs zero out the rest.
+		   Similarities with the code above are intentional :-) */
+	     "90:\t"
+		"clrw %3@+\n\t"
+		"movel %1,%4\n\t"
+		"lsrl #5,%1\n\t"
+		"jeq 1f\n\t"
+		"subql #1,%1\n"
+	     "91:\t"
+		"clrl %3@+\n"
+	     "92:\t"
+		"clrl %3@+\n"
+	     "93:\t"
+		"clrl %3@+\n"
+	     "94:\t"
+		"clrl %3@+\n"
+	     "95:\t"
+		"clrl %3@+\n"
+	     "96:\t"
+		"clrl %3@+\n"
+	     "97:\t"
+		"clrl %3@+\n"
+	     "98:\t"
+		"clrl %3@+\n\t"
+		"dbra %1,91b\n\t"
+		"clrw %1\n\t"
+		"subql #1,%1\n\t"
+		"jcc 91b\n"
+	     "1:\t"
+		"movel %4,%1\n\t"
+		"andw #0x1c,%4\n\t"
+		"jeq 1f\n\t"
+		"lsrw #2,%4\n\t"
+		"subqw #1,%4\n"
+	     "99:\t"
+		"clrl %3@+\n\t"
+		"dbra %4,99b\n\t"
+	     "1:\t"
+		"andw #3,%1\n\t"
+		"jeq 9f\n"
+	     "100:\t"
+		"clrw %3@+\n\t"
+		"tstw %1\n\t"
+		"jeq 9f\n"
+	     "101:\t"
+		"clrb %3@+\n"
+	     "9:\t"
+#define STR(X) STR1(X)
+#define STR1(X) #X
+		"moveq #-" STR(EFAULT) ",%5\n\t"
+		"jra 8b\n"
+		".previous\n"
+		".section __ex_table,\"a\"\n"
+		".long 10b,90b\n"
+		".long 11b,91b\n"
+		".long 12b,92b\n"
+		".long 13b,93b\n"
+		".long 14b,94b\n"
+		".long 15b,95b\n"
+		".long 16b,96b\n"
+		".long 17b,97b\n"
+		".long 18b,98b\n"
+		".long 19b,99b\n"
+		".long 20b,100b\n"
+		".long 21b,101b\n"
+		".previous"
+		: "=d" (sum), "=d" (len), "=a" (src), "=a" (dst),
+		  "=&d" (tmp1), "=d" (tmp2)
+		: "0" (sum), "1" (len), "2" (src), "3" (dst)
+	    );
+
+	*csum_err = tmp2;
+
+	return(sum);
+}
+
+EXPORT_SYMBOL(csum_partial_copy_from_user);
+
+
+/*
+ * copy from kernel space while checksumming, otherwise like csum_partial
+ */
+
+__wsum
+csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum)
+{
+	unsigned long tmp1, tmp2;
+	__asm__("movel %2,%4\n\t"
+		"btst #1,%4\n\t"	/* Check alignment */
+		"jeq 2f\n\t"
+		"subql #2,%1\n\t"	/* buff%4==2: treat first word */
+		"jgt 1f\n\t"
+		"addql #2,%1\n\t"	/* len was == 2, treat only rest */
+		"jra 4f\n"
+	     "1:\t"
+		"movew %2@+,%4\n\t"	/* add first word to sum */
+		"addw %4,%0\n\t"
+		"movew %4,%3@+\n\t"
+		"clrl %4\n\t"
+		"addxl %4,%0\n"		/* add X bit */
+	     "2:\t"
+		/* unrolled loop for the main part: do 8 longs at once */
+		"movel %1,%4\n\t"	/* save len in tmp1 */
+		"lsrl #5,%1\n\t"	/* len/32 */
+		"jeq 2f\n\t"		/* not enough... */
+		"subql #1,%1\n"
+	     "1:\t"
+		"movel %2@+,%5\n\t"
+		"addxl %5,%0\n\t"
+		"movel %5,%3@+\n\t"
+		"movel %2@+,%5\n\t"
+		"addxl %5,%0\n\t"
+		"movel %5,%3@+\n\t"
+		"movel %2@+,%5\n\t"
+		"addxl %5,%0\n\t"
+		"movel %5,%3@+\n\t"
+		"movel %2@+,%5\n\t"
+		"addxl %5,%0\n\t"
+		"movel %5,%3@+\n\t"
+		"movel %2@+,%5\n\t"
+		"addxl %5,%0\n\t"
+		"movel %5,%3@+\n\t"
+		"movel %2@+,%5\n\t"
+		"addxl %5,%0\n\t"
+		"movel %5,%3@+\n\t"
+		"movel %2@+,%5\n\t"
+		"addxl %5,%0\n\t"
+		"movel %5,%3@+\n\t"
+		"movel %2@+,%5\n\t"
+		"addxl %5,%0\n\t"
+		"movel %5,%3@+\n\t"
+		"dbra %1,1b\n\t"
+		"clrl %5\n\t"
+		"addxl %5,%0\n\t"	/* add X bit */
+		"clrw %1\n\t"
+		"subql #1,%1\n\t"
+		"jcc 1b\n"
+	     "2:\t"
+		"movel %4,%1\n\t"	/* restore len from tmp1 */
+		"andw #0x1c,%4\n\t"	/* number of rest longs */
+		"jeq 4f\n\t"
+		"lsrw #2,%4\n\t"
+		"subqw #1,%4\n"
+	     "3:\t"
+		/* loop for rest longs */
+		"movel %2@+,%5\n\t"
+		"addxl %5,%0\n\t"
+		"movel %5,%3@+\n\t"
+		"dbra %4,3b\n\t"
+		"clrl %5\n\t"
+		"addxl %5,%0\n"		/* add X bit */
+	     "4:\t"
+		/* now check for rest bytes that do not fit into longs */
+		"andw #3,%1\n\t"
+		"jeq 7f\n\t"
+		"clrl %5\n\t"		/* clear tmp2 for rest bytes */
+		"subqw #2,%1\n\t"
+		"jlt 5f\n\t"
+		"movew %2@+,%5\n\t"	/* have rest >= 2: get word */
+		"movew %5,%3@+\n\t"
+		"swap %5\n\t"		/* into bits 16..31 */
+		"tstw %1\n\t"		/* another byte? */
+		"jeq 6f\n"
+	     "5:\t"
+		"moveb %2@,%5\n\t"	/* have odd rest: get byte */
+		"moveb %5,%3@+\n\t"
+		"lslw #8,%5\n"		/* into bits 8..15; 16..31 untouched */
+	     "6:\t"
+		"addl %5,%0\n\t"	/* now add rest long to sum */
+		"clrl %5\n\t"
+		"addxl %5,%0\n"		/* add X bit */
+	     "7:\t"
+		: "=d" (sum), "=d" (len), "=a" (src), "=a" (dst),
+		  "=&d" (tmp1), "=&d" (tmp2)
+		: "0" (sum), "1" (len), "2" (src), "3" (dst)
+	    );
+    return(sum);
+}
+EXPORT_SYMBOL(csum_partial_copy_nocheck);

arch/m68k/lib/muldi3.c

···
-/* muldi3.c extracted from gcc-2.7.2.3/libgcc2.c and
-			   gcc-2.7.2.3/longlong.h which is: */
-/* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
-
-This file is part of GNU CC.
-
-GNU CC is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU CC is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING.  If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA.  */
-
-#define BITS_PER_UNIT 8
-
-#define umul_ppmm(w1, w0, u, v) \
-  __asm__ ("mulu%.l %3,%1:%0"						\
-           : "=d" ((USItype)(w0)),					\
-             "=d" ((USItype)(w1))					\
-           : "%0" ((USItype)(u)),					\
-             "dmi" ((USItype)(v)))
-
-#define __umulsidi3(u, v) \
-  ({DIunion __w;							\
-    umul_ppmm (__w.s.high, __w.s.low, u, v);				\
-    __w.ll; })
-
-typedef		 int SItype	__attribute__ ((mode (SI)));
-typedef unsigned int USItype	__attribute__ ((mode (SI)));
-typedef		 int DItype	__attribute__ ((mode (DI)));
-typedef int word_type __attribute__ ((mode (__word__)));
-
-struct DIstruct {SItype high, low;};
-
-typedef union
-{
-  struct DIstruct s;
-  DItype ll;
-} DIunion;
-
-DItype
-__muldi3 (DItype u, DItype v)
-{
-  DIunion w;
-  DIunion uu, vv;
-
-  uu.ll = u,
-  vv.ll = v;
-
-  w.ll = __umulsidi3 (uu.s.low, vv.s.low);
-  w.s.high += ((USItype) uu.s.low * (USItype) vv.s.high
-	       + (USItype) uu.s.high * (USItype) vv.s.low);
-
-  return w.ll;
-}
+#ifdef CONFIG_MMU
+#include "muldi3_mm.c"
+#else
+#include "muldi3_no.c"
+#endif

arch/m68k/mm/Makefile

···
-#
-# Makefile for the linux m68k-specific parts of the memory manager.
-#
-
-obj-y		:= cache.o init.o fault.o hwtest.o
-
-obj-$(CONFIG_MMU_MOTOROLA)	+= kmap.o memory.o motorola.o
-obj-$(CONFIG_MMU_SUN3)		+= sun3kmap.o sun3mmu.o
+ifdef CONFIG_MMU
+include arch/m68k/mm/Makefile_mm
+else
+include arch/m68k/mm/Makefile_no
+endif

arch/m68k/mm/Makefile_mm

···
+#
+# Makefile for the linux m68k-specific parts of the memory manager.
+#
+
+obj-y		:= cache.o init.o fault.o hwtest.o
+
+obj-$(CONFIG_MMU_MOTOROLA)	+= kmap.o memory.o motorola.o
+obj-$(CONFIG_MMU_SUN3)		+= sun3kmap.o sun3mmu.o

arch/m68k/mm/init.c

···
-/*
- *  linux/arch/m68k/mm/init.c
- *
- *  Copyright (C) 1995  Hamish Macdonald
- *
- *  Contains common initialization routines, specific init code moved
- *  to motorola.c and sun3mmu.c
- */
-
-#include <linux/module.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/swap.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/init.h>
-#include <linux/bootmem.h>
-#include <linux/gfp.h>
-
-#include <asm/setup.h>
-#include <asm/uaccess.h>
-#include <asm/page.h>
-#include <asm/pgalloc.h>
-#include <asm/system.h>
-#include <asm/machdep.h>
-#include <asm/io.h>
-#ifdef CONFIG_ATARI
-#include <asm/atari_stram.h>
-#endif
-#include <asm/sections.h>
-#include <asm/tlb.h>
-
-DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
-
-pg_data_t pg_data_map[MAX_NUMNODES];
-EXPORT_SYMBOL(pg_data_map);
-
-int m68k_virt_to_node_shift;
-
-#ifndef CONFIG_SINGLE_MEMORY_CHUNK
-pg_data_t *pg_data_table[65];
-EXPORT_SYMBOL(pg_data_table);
-#endif
-
-void __init m68k_setup_node(int node)
-{
-#ifndef CONFIG_SINGLE_MEMORY_CHUNK
-	struct mem_info *info = m68k_memory + node;
-	int i, end;
-
-	i = (unsigned long)phys_to_virt(info->addr) >> __virt_to_node_shift();
-	end = (unsigned long)phys_to_virt(info->addr + info->size - 1) >> __virt_to_node_shift();
-	for (; i <= end; i++) {
-		if (pg_data_table[i])
-			printk("overlap at %u for chunk %u\n", i, node);
-		pg_data_table[i] = pg_data_map + node;
-	}
-#endif
-	pg_data_map[node].bdata = bootmem_node_data + node;
-	node_set_online(node);
-}
-
-
-/*
- * ZERO_PAGE is a special page that is used for zero-initialized
- * data and COW.
- */
-
-void *empty_zero_page;
-EXPORT_SYMBOL(empty_zero_page);
-
-extern void init_pointer_table(unsigned long ptable);
-
-/* References to section boundaries */
-
-extern pmd_t *zero_pgtable;
-
-void __init mem_init(void)
-{
-	pg_data_t *pgdat;
-	int codepages = 0;
-	int datapages = 0;
-	int initpages = 0;
-	int i;
-
-#ifdef CONFIG_ATARI
-	if (MACH_IS_ATARI)
-		atari_stram_mem_init_hook();
-#endif
-
-	/* this will put all memory onto the freelists */
-	totalram_pages = num_physpages = 0;
-	for_each_online_pgdat(pgdat) {
-		num_physpages += pgdat->node_present_pages;
-
-		totalram_pages += free_all_bootmem_node(pgdat);
-		for (i = 0; i < pgdat->node_spanned_pages; i++) {
-			struct page *page = pgdat->node_mem_map + i;
-			char *addr = page_to_virt(page);
-
-			if (!PageReserved(page))
-				continue;
-			if (addr >= _text &&
-			    addr < _etext)
-				codepages++;
-			else if (addr >= __init_begin &&
-				 addr < __init_end)
-				initpages++;
-			else
-				datapages++;
-		}
-	}
-
-#ifndef CONFIG_SUN3
-	/* insert pointer tables allocated so far into the tablelist */
-	init_pointer_table((unsigned long)kernel_pg_dir);
-	for (i = 0; i < PTRS_PER_PGD; i++) {
-		if (pgd_present(kernel_pg_dir[i]))
-			init_pointer_table(__pgd_page(kernel_pg_dir[i]));
-	}
-
-	/* insert also pointer table that we used to unmap the zero page */
-	if (zero_pgtable)
-		init_pointer_table((unsigned long)zero_pgtable);
-#endif
-
-	printk("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init)\n",
-	       nr_free_pages() << (PAGE_SHIFT-10),
-	       totalram_pages << (PAGE_SHIFT-10),
-	       codepages << (PAGE_SHIFT-10),
-	       datapages << (PAGE_SHIFT-10),
-	       initpages << (PAGE_SHIFT-10));
-}
-
-#ifdef CONFIG_BLK_DEV_INITRD
-void free_initrd_mem(unsigned long start, unsigned long end)
-{
-	int pages = 0;
-	for (; start < end; start += PAGE_SIZE) {
-		ClearPageReserved(virt_to_page(start));
-		init_page_count(virt_to_page(start));
-		free_page(start);
-		totalram_pages++;
-		pages++;
-	}
-	printk ("Freeing initrd memory: %dk freed\n", pages);
-}
+#ifdef CONFIG_MMU
+#include "init_mm.c"
+#else
+#include "init_no.c"
 #endif

arch/m68k/mm/init_mm.c

···
+/*
+ *  linux/arch/m68k/mm/init.c
+ *
+ *  Copyright (C) 1995  Hamish Macdonald
+ *
+ *  Contains common initialization routines, specific init code moved
+ *  to motorola.c and sun3mmu.c
+ */
+
+#include <linux/module.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/swap.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/gfp.h>
+
+#include <asm/setup.h>
+#include <asm/uaccess.h>
+#include <asm/page.h>
+#include <asm/pgalloc.h>
+#include <asm/system.h>
+#include <asm/machdep.h>
+#include <asm/io.h>
+#ifdef CONFIG_ATARI
+#include <asm/atari_stram.h>
+#endif
+#include <asm/sections.h>
+#include <asm/tlb.h>
+
+DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
+
+pg_data_t pg_data_map[MAX_NUMNODES];
+EXPORT_SYMBOL(pg_data_map);
+
+int m68k_virt_to_node_shift;
+
+#ifndef CONFIG_SINGLE_MEMORY_CHUNK
+pg_data_t *pg_data_table[65];
+EXPORT_SYMBOL(pg_data_table);
+#endif
+
+void __init m68k_setup_node(int node)
+{
+#ifndef CONFIG_SINGLE_MEMORY_CHUNK
+	struct mem_info *info = m68k_memory + node;
+	int i, end;
+
+	i = (unsigned long)phys_to_virt(info->addr) >> __virt_to_node_shift();
+	end = (unsigned long)phys_to_virt(info->addr + info->size - 1) >> __virt_to_node_shift();
+	for (; i <= end; i++) {
+		if (pg_data_table[i])
+			printk("overlap at %u for chunk %u\n", i, node);
+		pg_data_table[i] = pg_data_map + node;
+	}
+#endif
+	pg_data_map[node].bdata = bootmem_node_data + node;
+	node_set_online(node);
+}
+
+
+/*
+ * ZERO_PAGE is a special page that is used for zero-initialized
+ * data and COW.
+ */
+
+void *empty_zero_page;
+EXPORT_SYMBOL(empty_zero_page);
+
+extern void init_pointer_table(unsigned long ptable);
+
+/* References to section boundaries */
+
+extern pmd_t *zero_pgtable;
+
+void __init mem_init(void)
+{
+	pg_data_t *pgdat;
+	int codepages = 0;
+	int datapages = 0;
+	int initpages = 0;
+	int i;
+
+#ifdef CONFIG_ATARI
+	if (MACH_IS_ATARI)
+		atari_stram_mem_init_hook();
+#endif
+
+	/* this will put all memory onto the freelists */
+	totalram_pages = num_physpages = 0;
+	for_each_online_pgdat(pgdat) {
+		num_physpages += pgdat->node_present_pages;
+
+		totalram_pages += free_all_bootmem_node(pgdat);
+		for (i = 0; i < pgdat->node_spanned_pages; i++) {
+			struct page *page = pgdat->node_mem_map + i;
+			char *addr = page_to_virt(page);
+
+			if (!PageReserved(page))
+				continue;
+			if (addr >= _text &&
+			    addr < _etext)
+				codepages++;
+			else if (addr >= __init_begin &&
+				 addr < __init_end)
+				initpages++;
+			else
+				datapages++;
+		}
+	}
+
+#ifndef CONFIG_SUN3
+	/* insert pointer tables allocated so far into the tablelist */
+	init_pointer_table((unsigned long)kernel_pg_dir);
+	for (i = 0; i < PTRS_PER_PGD; i++) {
+		if (pgd_present(kernel_pg_dir[i]))
+			init_pointer_table(__pgd_page(kernel_pg_dir[i]));
+	}
+
+	/* insert also pointer table that we used to unmap the zero page */
+	if (zero_pgtable)
+		init_pointer_table((unsigned long)zero_pgtable);
+#endif
+
+	printk("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init)\n",
+	       nr_free_pages() << (PAGE_SHIFT-10),
+	       totalram_pages << (PAGE_SHIFT-10),
+	       codepages << (PAGE_SHIFT-10),
+	       datapages << (PAGE_SHIFT-10),
+	       initpages << (PAGE_SHIFT-10));
+}
+
+#ifdef CONFIG_BLK_DEV_INITRD
+void free_initrd_mem(unsigned long start, unsigned long end)
+{
+	int pages = 0;
+	for (; start < end; start += PAGE_SIZE) {
+		ClearPageReserved(virt_to_page(start));
+		init_page_count(virt_to_page(start));
+		free_page(start);
+		totalram_pages++;
+		pages++;
+	}
+	printk ("Freeing initrd memory: %dk freed\n", pages);
+}
+#endif

arch/m68k/mm/kmap.c

···
-/*
- *  linux/arch/m68k/mm/kmap.c
- *
- *  Copyright (C) 1997 Roman Hodek
- *
- *  10/01/99 cleaned up the code and changing to the same interface
- *	     used by other architectures		/Roman Zippel
- */
-
-#include <linux/module.h>
-#include <linux/mm.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-
-#include <asm/setup.h>
-#include <asm/segment.h>
-#include <asm/page.h>
-#include <asm/pgalloc.h>
-#include <asm/io.h>
-#include <asm/system.h>
-
-#undef DEBUG
-
-#define PTRTREESIZE	(256*1024)
-
-/*
- * For 040/060 we can use the virtual memory area like other architectures,
- * but for 020/030 we want to use early termination page descriptor and we
- * can't mix this with normal page descriptors, so we have to copy that code
- * (mm/vmalloc.c) and return appriorate aligned addresses.
- */
-
-#ifdef CPU_M68040_OR_M68060_ONLY
-
-#define IO_SIZE		PAGE_SIZE
-
-static inline struct vm_struct *get_io_area(unsigned long size)
-{
-	return get_vm_area(size, VM_IOREMAP);
-}
-
-
-static inline void free_io_area(void *addr)
-{
-	vfree((void *)(PAGE_MASK & (unsigned long)addr));
-}
-
+#ifdef CONFIG_MMU
+#include "kmap_mm.c"
 #else
-
-#define IO_SIZE		(256*1024)
-
-static struct vm_struct *iolist;
-
-static struct vm_struct *get_io_area(unsigned long size)
-{
-	unsigned long addr;
-	struct vm_struct **p, *tmp, *area;
-
-	area = kmalloc(sizeof(*area), GFP_KERNEL);
-	if (!area)
-		return NULL;
-	addr = KMAP_START;
-	for (p = &iolist; (tmp = *p) ; p = &tmp->next) {
-		if (size + addr < (unsigned long)tmp->addr)
-			break;
-		if (addr > KMAP_END-size) {
-			kfree(area);
-			return NULL;
-		}
-		addr = tmp->size + (unsigned long)tmp->addr;
-	}
-	area->addr = (void *)addr;
-	area->size = size + IO_SIZE;
-	area->next = *p;
-	*p = area;
-	return area;
-}
-
-static inline void free_io_area(void *addr)
-{
-	struct vm_struct **p, *tmp;
-
-	if (!addr)
-		return;
-	addr = (void *)((unsigned long)addr & -IO_SIZE);
-	for (p = &iolist ; (tmp = *p) ; p = &tmp->next) {
-		if (tmp->addr == addr) {
-			*p = tmp->next;
-			__iounmap(tmp->addr, tmp->size);
-			kfree(tmp);
-			return;
-		}
-	}
-}
-
+#include "kmap_no.c"
 #endif
-
-/*
- * Map some physical address range into the kernel address space.
- */
-/* Rewritten by Andreas Schwab to remove all races. */
-
-void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag)
-{
-	struct vm_struct *area;
-	unsigned long virtaddr, retaddr;
-	long offset;
-	pgd_t *pgd_dir;
-	pmd_t *pmd_dir;
-	pte_t *pte_dir;
-
-	/*
-	 * Don't allow mappings that wrap..
-	 */
-	if (!size || physaddr > (unsigned long)(-size))
-		return NULL;
-
-#ifdef CONFIG_AMIGA
-	if (MACH_IS_AMIGA) {
-		if ((physaddr >= 0x40000000) && (physaddr + size < 0x60000000)
-		    && (cacheflag == IOMAP_NOCACHE_SER))
-			return (void __iomem *)physaddr;
-	}
-#endif
-
-#ifdef DEBUG
-	printk("ioremap: 0x%lx,0x%lx(%d) - ", physaddr, size, cacheflag);
-#endif
-	/*
-	 * Mappings have to be aligned
-	 */
-	offset = physaddr & (IO_SIZE - 1);
-	physaddr &= -IO_SIZE;
-	size = (size + offset + IO_SIZE - 1) & -IO_SIZE;
-
-	/*
-	 * Ok, go for it..
-	 */
-	area = get_io_area(size);
-	if (!area)
-		return NULL;
-
-	virtaddr = (unsigned long)area->addr;
-	retaddr = virtaddr + offset;
-#ifdef DEBUG
-	printk("0x%lx,0x%lx,0x%lx", physaddr, virtaddr, retaddr);
-#endif
-
-	/*
-	 * add cache and table flags to physical address
-	 */
-	if (CPU_IS_040_OR_060) {
-		physaddr |= (_PAGE_PRESENT | _PAGE_GLOBAL040 |
-			     _PAGE_ACCESSED | _PAGE_DIRTY);
-		switch (cacheflag) {
-		case IOMAP_FULL_CACHING:
-			physaddr |= _PAGE_CACHE040;
-			break;
-		case IOMAP_NOCACHE_SER:
-		default:
-			physaddr |= _PAGE_NOCACHE_S;
-			break;
-		case IOMAP_NOCACHE_NONSER:
-			physaddr |= _PAGE_NOCACHE;
-			break;
-		case IOMAP_WRITETHROUGH:
-			physaddr |= _PAGE_CACHE040W;
-			break;
-		}
-	} else {
-		physaddr |= (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY);
-		switch (cacheflag) {
-		case IOMAP_NOCACHE_SER:
-		case IOMAP_NOCACHE_NONSER:
-		default:
-			physaddr |= _PAGE_NOCACHE030;
-			break;
-		case IOMAP_FULL_CACHING:
-		case IOMAP_WRITETHROUGH:
-			break;
-		}
-	}
-
-	while ((long)size > 0) {
-#ifdef DEBUG
-		if (!(virtaddr & (PTRTREESIZE-1)))
-			printk ("\npa=%#lx va=%#lx ", physaddr, virtaddr);
-#endif
-		pgd_dir = pgd_offset_k(virtaddr);
-		pmd_dir = pmd_alloc(&init_mm, pgd_dir, virtaddr);
-		if (!pmd_dir) {
-			printk("ioremap: no mem for pmd_dir\n");
-			return NULL;
-		}
-
-		if (CPU_IS_020_OR_030) {
-			pmd_dir->pmd[(virtaddr/PTRTREESIZE) & 15] = physaddr;
-			physaddr += PTRTREESIZE;
-			virtaddr += PTRTREESIZE;
-			size -= PTRTREESIZE;
-		} else {
-			pte_dir = pte_alloc_kernel(pmd_dir, virtaddr);
-			if (!pte_dir) {
-				printk("ioremap: no mem for pte_dir\n");
-				return NULL;
-			}
-
-			pte_val(*pte_dir) = physaddr;
-			virtaddr += PAGE_SIZE;
-			physaddr += PAGE_SIZE;
-			size -= PAGE_SIZE;
-		}
-	}
-#ifdef DEBUG
-	printk("\n");
-#endif
-	flush_tlb_all();
-
-	return (void __iomem *)retaddr;
-}
-EXPORT_SYMBOL(__ioremap);
-
-/*
- * Unmap a ioremap()ed region again
- */
-void iounmap(void __iomem *addr)
-{
-#ifdef CONFIG_AMIGA
-	if ((!MACH_IS_AMIGA) ||
-	    (((unsigned long)addr < 0x40000000) ||
-	     ((unsigned long)addr > 0x60000000)))
-			free_io_area((__force void *)addr);
-#else
-	free_io_area((__force void *)addr);
-#endif
-}
-EXPORT_SYMBOL(iounmap);
-
-/*
- * __iounmap unmaps nearly everything, so be careful
- * it doesn't free currently pointer/page tables anymore but it
- * wans't used anyway and might be added later.
- */
-void __iounmap(void *addr, unsigned long size)
-{
-	unsigned long virtaddr = (unsigned long)addr;
-	pgd_t *pgd_dir;
-	pmd_t *pmd_dir;
-	pte_t *pte_dir;
-
-	while ((long)size > 0) {
-		pgd_dir = pgd_offset_k(virtaddr);
-		if (pgd_bad(*pgd_dir)) {
-			printk("iounmap: bad pgd(%08lx)\n", pgd_val(*pgd_dir));
-			pgd_clear(pgd_dir);
-			return;
-		}
-		pmd_dir = pmd_offset(pgd_dir, virtaddr);
-
-		if (CPU_IS_020_OR_030) {
-			int pmd_off = (virtaddr/PTRTREESIZE) & 15;
-			int pmd_type = pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK;
-
-			if (pmd_type == _PAGE_PRESENT) {
-				pmd_dir->pmd[pmd_off] = 0;
-				virtaddr += PTRTREESIZE;
-				size -= PTRTREESIZE;
-				continue;
-			} else if (pmd_type == 0)
-				continue;
-		}
-
-		if (pmd_bad(*pmd_dir)) {
-			printk("iounmap: bad pmd (%08lx)\n", pmd_val(*pmd_dir));
-			pmd_clear(pmd_dir);
-			return;
-		}
-		pte_dir = pte_offset_kernel(pmd_dir, virtaddr);
-
-		pte_val(*pte_dir) = 0;
-		virtaddr += PAGE_SIZE;
-		size -= PAGE_SIZE;
-	}
-
-	flush_tlb_all();
-}
-
-/*
- * Set new cache mode for some kernel address space.
- * The caller must push data for that range itself, if such data may already
- * be in the cache.
- */
-void kernel_set_cachemode(void *addr, unsigned long size, int cmode)
-{
-	unsigned long virtaddr = (unsigned long)addr;
-	pgd_t *pgd_dir;
-	pmd_t *pmd_dir;
-	pte_t *pte_dir;
-
-	if (CPU_IS_040_OR_060) {
-		switch (cmode) {
-		case IOMAP_FULL_CACHING:
-			cmode = _PAGE_CACHE040;
-			break;
-		case IOMAP_NOCACHE_SER:
-		default:
-			cmode = _PAGE_NOCACHE_S;
-			break;
-		case IOMAP_NOCACHE_NONSER:
-			cmode = _PAGE_NOCACHE;
-			break;
-		case IOMAP_WRITETHROUGH:
-			cmode = _PAGE_CACHE040W;
-			break;
-		}
-	} else {
-		switch (cmode) {
-		case IOMAP_NOCACHE_SER:
-		case IOMAP_NOCACHE_NONSER:
-		default:
-			cmode = _PAGE_NOCACHE030;
-			break;
-		case IOMAP_FULL_CACHING:
-		case IOMAP_WRITETHROUGH:
-			cmode = 0;
-		}
-	}
-
-	while ((long)size > 0) {
-		pgd_dir = pgd_offset_k(virtaddr);
-		if (pgd_bad(*pgd_dir)) {
-			printk("iocachemode: bad pgd(%08lx)\n", pgd_val(*pgd_dir));
-			pgd_clear(pgd_dir);
-			return;
-		}
-		pmd_dir = pmd_offset(pgd_dir, virtaddr);
-
-		if (CPU_IS_020_OR_030) {
-			int pmd_off = (virtaddr/PTRTREESIZE) & 15;
-
-			if ((pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK) == _PAGE_PRESENT) {
-				pmd_dir->pmd[pmd_off] = (pmd_dir->pmd[pmd_off] &
-							 _CACHEMASK040) | cmode;
-				virtaddr += PTRTREESIZE;
-				size -= PTRTREESIZE;
-				continue;
-			}
-		}
-
-		if (pmd_bad(*pmd_dir)) {
-			printk("iocachemode: bad pmd (%08lx)\n", pmd_val(*pmd_dir));
-			pmd_clear(pmd_dir);
-			return;
-		}
-		pte_dir = pte_offset_kernel(pmd_dir, virtaddr);
-
-		pte_val(*pte_dir) = (pte_val(*pte_dir) & _CACHEMASK040) | cmode;
-		virtaddr += PAGE_SIZE;
-		size -= PAGE_SIZE;
-	}
-
-	flush_tlb_all();
-}
-EXPORT_SYMBOL(kernel_set_cachemode);

arch/m68k/mm/kmap_mm.c

···
+/*
+ *  linux/arch/m68k/mm/kmap.c
+ *
+ *  Copyright (C) 1997 Roman Hodek
+ *
+ *  10/01/99 cleaned up the code and changing to the same interface
+ *	     used by other architectures		/Roman Zippel
+ */
+
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+
+#include <asm/setup.h>
+#include <asm/segment.h>
+#include <asm/page.h>
+#include <asm/pgalloc.h>
+#include <asm/io.h>
+#include <asm/system.h>
+
+#undef DEBUG
+
+#define PTRTREESIZE	(256*1024)
+
+/*
+ * For 040/060 we can use the virtual memory area like other architectures,
+ * but for 020/030 we want to use early termination page descriptor and we
+ * can't mix this with normal page descriptors, so we have to copy that code
+ * (mm/vmalloc.c) and return appriorate aligned addresses.
+ */
+
+#ifdef CPU_M68040_OR_M68060_ONLY
+
+#define IO_SIZE		PAGE_SIZE
+
+static inline struct vm_struct *get_io_area(unsigned long size)
+{
+	return get_vm_area(size, VM_IOREMAP);
+}
+
+
+static inline void free_io_area(void *addr)
+{
+	vfree((void *)(PAGE_MASK & (unsigned long)addr));
+}
+
+#else
+
+#define IO_SIZE		(256*1024)
+
+static struct vm_struct *iolist;
+
+static struct vm_struct *get_io_area(unsigned long size)
+{
+	unsigned long addr;
+	struct vm_struct **p, *tmp, *area;
+
+	area = kmalloc(sizeof(*area), GFP_KERNEL);
+	if (!area)
+		return NULL;
+	addr = KMAP_START;
+	for (p = &iolist; (tmp = *p) ; p = &tmp->next) {
+		if (size + addr < (unsigned long)tmp->addr)
+			break;
+		if (addr > KMAP_END-size) {
+			kfree(area);
+			return NULL;
+		}
+		addr = tmp->size + (unsigned long)tmp->addr;
+	}
+	area->addr = (void *)addr;
+	area->size = size + IO_SIZE;
+	area->next = *p;
+	*p = area;
+	return area;
+}
+
+static inline void free_io_area(void *addr)
+{
+	struct vm_struct **p, *tmp;
+
+	if (!addr)
+		return;
+	addr = (void *)((unsigned long)addr & -IO_SIZE);
+	for (p = &iolist ; (tmp = *p) ; p = &tmp->next) {
+		if (tmp->addr == addr) {
+			*p = tmp->next;
+			__iounmap(tmp->addr, tmp->size);
+			kfree(tmp);
+			return;
+		}
+	}
+}
+
+#endif
+
+/*
+ * Map some physical address range into the kernel address space.
+ */
+/* Rewritten by Andreas Schwab to remove all races. */
+
+void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag)
+{
+	struct vm_struct *area;
+	unsigned long virtaddr, retaddr;
+	long offset;
+	pgd_t *pgd_dir;
+	pmd_t *pmd_dir;
+	pte_t *pte_dir;
+
+	/*
+	 * Don't allow mappings that wrap..
+	 */
+	if (!size || physaddr > (unsigned long)(-size))
+		return NULL;
+
+#ifdef CONFIG_AMIGA
+	if (MACH_IS_AMIGA) {
+		if ((physaddr >= 0x40000000) && (physaddr + size < 0x60000000)
+		    && (cacheflag == IOMAP_NOCACHE_SER))
+			return (void __iomem *)physaddr;
+	}
+#endif
+
+#ifdef DEBUG
+	printk("ioremap: 0x%lx,0x%lx(%d) - ", physaddr, size, cacheflag);
+#endif
+	/*
+	 * Mappings have to be aligned
+	 */
+	offset = physaddr & (IO_SIZE - 1);
+	physaddr &= -IO_SIZE;
+	size = (size + offset + IO_SIZE - 1) & -IO_SIZE;
+
+	/*
+	 * Ok, go for it..
+	 */
+	area = get_io_area(size);
+	if (!area)
+		return NULL;
+
+	virtaddr = (unsigned long)area->addr;
+	retaddr = virtaddr + offset;
+#ifdef DEBUG
+	printk("0x%lx,0x%lx,0x%lx", physaddr, virtaddr, retaddr);
+#endif
+
+	/*
+	 * add cache and table flags to physical address
+	 */
+	if (CPU_IS_040_OR_060) {
+		physaddr |= (_PAGE_PRESENT | _PAGE_GLOBAL040 |
+			     _PAGE_ACCESSED | _PAGE_DIRTY);
+		switch (cacheflag) {
+		case IOMAP_FULL_CACHING:
+			physaddr |= _PAGE_CACHE040;
+			break;
+		case IOMAP_NOCACHE_SER:
+		default:
+			physaddr |= _PAGE_NOCACHE_S;
+			break;
+		case IOMAP_NOCACHE_NONSER:
+			physaddr |= _PAGE_NOCACHE;
+			break;
+		case IOMAP_WRITETHROUGH:
+			physaddr |= _PAGE_CACHE040W;
+			break;
+		}
+	} else {
+		physaddr |= (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY);
+		switch (cacheflag) {
+		case IOMAP_NOCACHE_SER:
+		case IOMAP_NOCACHE_NONSER:
+		default:
+			physaddr |= _PAGE_NOCACHE030;
+			break;
+		case IOMAP_FULL_CACHING:
+		case IOMAP_WRITETHROUGH:
+			break;
+		}
+	}
+
+	while ((long)size > 0) {
+#ifdef DEBUG
+		if (!(virtaddr & (PTRTREESIZE-1)))
+			printk ("\npa=%#lx va=%#lx ", physaddr, virtaddr);
+#endif
+		pgd_dir = pgd_offset_k(virtaddr);
+		pmd_dir = pmd_alloc(&init_mm, pgd_dir, virtaddr);
+		if (!pmd_dir) {
+			printk("ioremap: no mem for pmd_dir\n");
+			return NULL;
+		}
+
+		if (CPU_IS_020_OR_030) {
+			pmd_dir->pmd[(virtaddr/PTRTREESIZE) & 15] = physaddr;
+			physaddr += PTRTREESIZE;
+			virtaddr += PTRTREESIZE;
+			size -= PTRTREESIZE;
+		} else {
+			pte_dir = pte_alloc_kernel(pmd_dir, virtaddr);
+			if (!pte_dir) {
+				printk("ioremap: no mem for pte_dir\n");
+				return NULL;
+			}
+
+			pte_val(*pte_dir) = physaddr;
+			virtaddr += PAGE_SIZE;
+			physaddr += PAGE_SIZE;
+			size -= PAGE_SIZE;
+		}
+	}
+#ifdef DEBUG
+	printk("\n");
+#endif
+	flush_tlb_all();
+
+	return (void __iomem *)retaddr;
+}
+EXPORT_SYMBOL(__ioremap);
+
+/*
+ * Unmap a ioremap()ed region again
+ */
+void iounmap(void __iomem *addr)
+{
+#ifdef CONFIG_AMIGA
+	if ((!MACH_IS_AMIGA) ||
+	    (((unsigned long)addr < 0x40000000) ||
+	     ((unsigned long)addr > 0x60000000)))
+			free_io_area((__force void *)addr);
+#else
+	free_io_area((__force void *)addr);
+#endif
+}
+EXPORT_SYMBOL(iounmap);
+
+/*
+ * __iounmap unmaps nearly everything, so be careful
+ * it doesn't free currently pointer/page tables anymore but it
+ * wans't used anyway and might be added later.
+ */
+void __iounmap(void *addr, unsigned long size)
+{
+	unsigned long virtaddr = (unsigned long)addr;
+	pgd_t *pgd_dir;
+	pmd_t *pmd_dir;
+	pte_t *pte_dir;
+
+	while ((long)size > 0) {
+		pgd_dir = pgd_offset_k(virtaddr);
+		if (pgd_bad(*pgd_dir)) {
+			printk("iounmap: bad pgd(%08lx)\n", pgd_val(*pgd_dir));
+			pgd_clear(pgd_dir);
+			return;
+		}
+		pmd_dir = pmd_offset(pgd_dir, virtaddr);
+
+		if (CPU_IS_020_OR_030) {
+			int pmd_off = (virtaddr/PTRTREESIZE) & 15;
+			int pmd_type = pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK;
+
+			if (pmd_type == _PAGE_PRESENT) {
+				pmd_dir->pmd[pmd_off] = 0;
+				virtaddr += PTRTREESIZE;
+				size -= PTRTREESIZE;
+				continue;
+			} else if (pmd_type == 0)
+				continue;
+		}
+
+		if (pmd_bad(*pmd_dir)) {
+			printk("iounmap: bad pmd (%08lx)\n", pmd_val(*pmd_dir));
+			pmd_clear(pmd_dir);
+			return;
+		}
+		pte_dir = pte_offset_kernel(pmd_dir, virtaddr);
+
+		pte_val(*pte_dir) = 0;
+		virtaddr += PAGE_SIZE;
+		size -= PAGE_SIZE;
+	}
+
+	flush_tlb_all();
+}
+
+/*
+ * Set new cache mode for some kernel address space.
+ * The caller must push data for that range itself, if such data may already
+ * be in the cache.
+ */
+void kernel_set_cachemode(void *addr, unsigned long size, int cmode)
+{
+	unsigned long virtaddr = (unsigned long)addr;
+	pgd_t *pgd_dir;
+	pmd_t *pmd_dir;
+	pte_t *pte_dir;
+
+	if (CPU_IS_040_OR_060) {
+		switch (cmode) {
+		case IOMAP_FULL_CACHING:
+			cmode = _PAGE_CACHE040;
+			break;
+		case IOMAP_NOCACHE_SER:
+		default:
+			cmode = _PAGE_NOCACHE_S;
+			break;
+		case IOMAP_NOCACHE_NONSER:
+			cmode = _PAGE_NOCACHE;
+			break;
+		case IOMAP_WRITETHROUGH:
+			cmode = _PAGE_CACHE040W;
+			break;
+		}
+	} else {
+		switch (cmode) {
+		case IOMAP_NOCACHE_SER:
+		case IOMAP_NOCACHE_NONSER:
+		default:
+			cmode = _PAGE_NOCACHE030;
+			break;
+		case IOMAP_FULL_CACHING:
+		case IOMAP_WRITETHROUGH:
+			cmode = 0;
+		}
+	}
+
+	while ((long)size > 0) {
+		pgd_dir = pgd_offset_k(virtaddr);
+		if (pgd_bad(*pgd_dir)) {
+			printk("iocachemode: bad pgd(%08lx)\n", pgd_val(*pgd_dir));
+			pgd_clear(pgd_dir);
+			return;
+		}
+		pmd_dir = pmd_offset(pgd_dir, virtaddr);
+
+		if (CPU_IS_020_OR_030) {
+			int pmd_off = (virtaddr/PTRTREESIZE) & 15;
+
+			if ((pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK) == _PAGE_PRESENT) {
+				pmd_dir->pmd[pmd_off] = (pmd_dir->pmd[pmd_off] &
+							 _CACHEMASK040) | cmode;
+				virtaddr += PTRTREESIZE;
+				size -= PTRTREESIZE;
+				continue;
+			}
+		}
+
+		if (pmd_bad(*pmd_dir)) {
+			printk("iocachemode: bad pmd (%08lx)\n", pmd_val(*pmd_dir));
+			pmd_clear(pmd_dir);
+			return;
+		}
+		pte_dir = pte_offset_kernel(pmd_dir, virtaddr);
+
+		pte_val(*pte_dir) = (pte_val(*pte_dir) & _CACHEMASK040) | cmode;
+		virtaddr += PAGE_SIZE;
+		size -= PAGE_SIZE;
+	}
+
+	flush_tlb_all();
+}
+EXPORT_SYMBOL(kernel_set_cachemode);

arch/m68knommu/Kconfig arch/m68k/Kconfig.nommu

···
-config M68K
-	bool
-	default y
-	select HAVE_IDE
-	select HAVE_GENERIC_HARDIRQS
-	select GENERIC_HARDIRQS_NO_DEPRECATED
-
-config MMU
-	bool
-	default n
-
-config NO_DMA
-	bool
-	depends on !COLDFIRE
-	default y
-
 config FPU
-	bool
-	default n
-
-config ZONE_DMA
-	bool
-	default y
-
-config RWSEM_GENERIC_SPINLOCK
-	bool
-	default y
-
-config RWSEM_XCHGADD_ALGORITHM
-	bool
-	default n
-
-config ARCH_HAS_ILOG2_U32
-	bool
-	default n
-
-config ARCH_HAS_ILOG2_U64
 	bool
 	default n
 
···
 	bool
 	default n
 
-config GENERIC_HWEIGHT
-	bool
-	default y
-
-config GENERIC_CALIBRATE_DELAY
-	bool
-	default y
-
 config GENERIC_CMOS_UPDATE
-	bool
-	default y
-
-config TIME_LOW_RES
 	bool
 	default y
 
 config GENERIC_CLOCKEVENTS
 	bool
 	default n
-
-config NO_IOPORT
-	def_bool y
 
 config COLDFIRE_SW_A7
 	bool
···
 
 config HAVE_IPSBAR
 	bool
-
-source "init/Kconfig"
-
-source "kernel/Kconfig.freezer"
-
-menu "Processor type and features"
 
 choice
 	prompt "CPU"
···
 	  running more threads on a system and also reduces the pressure
 	  on the VM subsystem for higher order allocations.
 
-config HZ
-	int
-	default 1000 if CLEOPATRA
-	default 100
-
 comment "RAM configuration"
 
 config RAMBASE
···
 
 source "kernel/time/Kconfig"
 
-source "mm/Kconfig"
-
-endmenu
-
 config ISA_DMA_API
 	bool
 	depends on !M5272
···
 
 source "drivers/pcmcia/Kconfig"
 
-menu "Executable file formats"
-
-source "fs/Kconfig.binfmt"
-
-endmenu
-
-menu "Power management options"
-
-config PM
-	bool "Power Management support"
-	help
-	  Support processor power management modes
-
-endmenu
-
-source "net/Kconfig"
-
-source "drivers/Kconfig"
-
-source "fs/Kconfig"
-
-source "arch/m68knommu/Kconfig.debug"
-
-source "security/Kconfig"
-
-source "crypto/Kconfig"
-
-source "lib/Kconfig"

arch/m68knommu/Kconfig.debug

···
-menu "Kernel hacking"
-
-source "lib/Kconfig.debug"
-
-config FULLDEBUG
-	bool "Full Symbolic/Source Debugging support"
-	help
-	  Enable debugging symbols on kernel build.
-
-config HIGHPROFILE
-	bool "Use fast second timer for profiling"
-	depends on COLDFIRE
-	help
-	  Use a fast secondary clock to produce profiling information.
-
-config BOOTPARAM
-	bool 'Compiled-in Kernel Boot Parameter'
-
-config BOOTPARAM_STRING
-	string 'Kernel Boot Parameter'
-	default 'console=ttyS0,19200'
-	depends on BOOTPARAM
-
-config NO_KERNEL_MSG
-	bool "Suppress Kernel BUG Messages"
-	help
-	  Do not output any debug BUG messages within the kernel.
-
-config BDM_DISABLE
-	bool "Disable BDM signals"
-	depends on (EXPERIMENTAL && COLDFIRE)
-	help
-	  Disable the ColdFire CPU's BDM signals.
-
-endmenu

arch/m68knommu/Makefile arch/m68k/Makefile_no

···
 #
-# arch/m68knommu/Makefile
+# arch/m68k/Makefile
 #
 # This file is subject to the terms and conditions of the GNU General Public
 # License.  See the file "COPYING" in the main directory of this archive
···
 #
 # (C) Copyright 2002, Greg Ungerer <[e-mail]>
 #
-
-KBUILD_DEFCONFIG := m5208evb_defconfig
 
 platform-$(CONFIG_M68328)	:= 68328
 platform-$(CONFIG_M68EZ328)	:= 68EZ328
···
 CPUCLASS := $(cpuclass-y)
 
 ifneq ($(CPUCLASS),$(PLATFORM))
-CLASSDIR := arch/m68knommu/platform/$(cpuclass-y)/
+CLASSDIR := arch/m68k/platform/$(cpuclass-y)/
 endif
 
 export PLATFORM BOARD MODEL CPUCLASS
···
 KBUILD_CFLAGS += -D__linux__
 KBUILD_CFLAGS += -DUTS_SYSNAME=\"uClinux\"
 
-head-y := arch/m68knommu/platform/$(cpuclass-y)/head.o
+head-y := arch/m68k/platform/$(cpuclass-y)/head.o
 
-core-y	+= arch/m68knommu/kernel/ \
-	   arch/m68knommu/mm/ \
+core-y	+= arch/m68k/kernel/ \
+	   arch/m68k/mm/ \
 	   $(CLASSDIR) \
-	   arch/m68knommu/platform/$(PLATFORM)/
-libs-y	+= arch/m68knommu/lib/
+	   arch/m68k/platform/$(PLATFORM)/
+libs-y	+= arch/m68k/lib/
 
 archclean:
 

arch/m68knommu/configs/m5208evb_defconfig arch/m68k/configs/m5307c3_defconfig

···
+# CONFIG_MMU is not set
 CONFIG_EXPERIMENTAL=y
 CONFIG_LOG_BUF_SHIFT=14
 # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
···
 # CONFIG_EVENTFD is not set
 # CONFIG_AIO is not set
 # CONFIG_VM_EVENT_COUNTERS is not set
-# CONFIG_COMPAT_BRK is not set
+# CONFIG_SLUB_DEBUG is not set
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set
-CONFIG_M520x=y
+CONFIG_M5307=y
 CONFIG_CLOCK_SET=y
-CONFIG_CLOCK_FREQ=166666666
+CONFIG_CLOCK_FREQ=90000000
 CONFIG_CLOCK_DIV=2
-CONFIG_M5208EVB=y
-# CONFIG_4KSTACKS is not set
-CONFIG_RAMBASE=0x40000000
-CONFIG_RAMSIZE=0x2000000
-CONFIG_VECTORBASE=0x40000000
-CONFIG_KERNELBASE=0x40020000
-CONFIG_RAM16BIT=y
+CONFIG_M5307C3=y
+CONFIG_RAMBASE=0x00000000
+CONFIG_RAMSIZE=0x00800000
+CONFIG_VECTORBASE=0x00000000
+CONFIG_KERNELBASE=0x00020000
 CONFIG_BINFMT_FLAT=y
 CONFIG_NET=y
 CONFIG_PACKET=y
···
 # CONFIG_INET_LRO is not set
 # CONFIG_INET_DIAG is not set
 # CONFIG_IPV6 is not set
+# CONFIG_FW_LOADER is not set
 CONFIG_MTD=y
 CONFIG_MTD_PARTITIONS=y
 CONFIG_MTD_CHAR=y
···
 # CONFIG_MISC_DEVICES is not set
 CONFIG_NETDEVICES=y
 CONFIG_NET_ETHERNET=y
-CONFIG_FEC=y
 # CONFIG_NETDEV_1000 is not set
 # CONFIG_NETDEV_10000 is not set
-# CONFIG_INPUT is not set
+CONFIG_PPP=y
+CONFIG_SLIP=y
+CONFIG_SLIP_COMPRESSED=y
+# CONFIG_INPUT_MOUSEDEV is not set
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
 # CONFIG_SERIO is not set
 # CONFIG_VT is not set
 CONFIG_SERIAL_MCF=y
-CONFIG_SERIAL_MCF_BAUDRATE=115200
 CONFIG_SERIAL_MCF_CONSOLE=y
-# CONFIG_UNIX98_PTYS is not set
+# CONFIG_LEGACY_PTYS is not set
 # CONFIG_HW_RANDOM is not set
 # CONFIG_HWMON is not set
+# CONFIG_HID_SUPPORT is not set
 # CONFIG_USB_SUPPORT is not set
 CONFIG_EXT2_FS=y
-# CONFIG_FILE_LOCKING is not set
 # CONFIG_DNOTIFY is not set
-# CONFIG_SYSFS is not set
 CONFIG_ROMFS_FS=y
 CONFIG_ROMFS_BACKED_BY_MTD=y
 # CONFIG_NETWORK_FILESYSTEMS is not set
···
 CONFIG_FULLDEBUG=y
 CONFIG_BOOTPARAM=y
 CONFIG_BOOTPARAM_STRING="root=/dev/mtdblock0"
+# CONFIG_CRC32 is not set

arch/m68knommu/configs/m5249evb_defconfig arch/m68k/configs/m5275evb_defconfig

···
+# CONFIG_MMU is not set
 CONFIG_EXPERIMENTAL=y
 CONFIG_LOG_BUF_SHIFT=14
 # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
···
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set
-CONFIG_M5249=y
+CONFIG_M5275=y
 CONFIG_CLOCK_SET=y
-CONFIG_CLOCK_FREQ=140000000
+CONFIG_CLOCK_FREQ=150000000
 CONFIG_CLOCK_DIV=2
-CONFIG_M5249C3=y
+CONFIG_M5275EVB=y
+# CONFIG_4KSTACKS is not set
 CONFIG_RAMBASE=0x00000000
-CONFIG_RAMSIZE=0x00800000
+CONFIG_RAMSIZE=0x00000000
 CONFIG_VECTORBASE=0x00000000
 CONFIG_KERNELBASE=0x00020000
 CONFIG_BINFMT_FLAT=y
···
 # CONFIG_INET_LRO is not set
 # CONFIG_INET_DIAG is not set
 # CONFIG_IPV6 is not set
+# CONFIG_FW_LOADER is not set
 CONFIG_MTD=y
 CONFIG_MTD_PARTITIONS=y
 CONFIG_MTD_CHAR=y
···
 # CONFIG_MISC_DEVICES is not set
 CONFIG_NETDEVICES=y
 CONFIG_NET_ETHERNET=y
+CONFIG_FEC=y
+CONFIG_FEC2=y
 # CONFIG_NETDEV_1000 is not set
 # CONFIG_NETDEV_10000 is not set
 CONFIG_PPP=y
···
 # CONFIG_USB_SUPPORT is not set
 CONFIG_EXT2_FS=y
 # CONFIG_FILE_LOCKING is not set
+# CONFIG_DNOTIFY is not set
 CONFIG_ROMFS_FS=y
 CONFIG_ROMFS_BACKED_BY_MTD=y
 # CONFIG_NETWORK_FILESYSTEMS is not set
 # CONFIG_RCU_CPU_STALL_DETECTOR is not set
+CONFIG_SYSCTL_SYSCALL_CHECK=y
 CONFIG_BOOTPARAM=y
 CONFIG_BOOTPARAM_STRING="root=/dev/mtdblock0"
 # CONFIG_CRC32 is not set

arch/m68knommu/configs/m5272c3_defconfig arch/m68k/configs/m5407c3_defconfig

···
+# CONFIG_MMU is not set
 CONFIG_EXPERIMENTAL=y
 CONFIG_LOG_BUF_SHIFT=14
 # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
···
 # CONFIG_EVENTFD is not set
 # CONFIG_AIO is not set
 # CONFIG_VM_EVENT_COUNTERS is not set
-# CONFIG_SLUB_DEBUG is not set
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set
-CONFIG_M5272=y
+CONFIG_M5407=y
 CONFIG_CLOCK_SET=y
-CONFIG_M5272C3=y
+CONFIG_CLOCK_FREQ=50000000
+CONFIG_M5407C3=y
 CONFIG_RAMBASE=0x00000000
-CONFIG_RAMSIZE=0x00800000
+CONFIG_RAMSIZE=0x00000000
 CONFIG_VECTORBASE=0x00000000
 CONFIG_KERNELBASE=0x00020000
 CONFIG_BINFMT_FLAT=y
···
 # CONFIG_INET_LRO is not set
 # CONFIG_INET_DIAG is not set
 # CONFIG_IPV6 is not set
+# CONFIG_FW_LOADER is not set
 CONFIG_MTD=y
 CONFIG_MTD_PARTITIONS=y
 CONFIG_MTD_CHAR=y
···
 # CONFIG_MISC_DEVICES is not set
 CONFIG_NETDEVICES=y
 CONFIG_NET_ETHERNET=y
-CONFIG_FEC=y
 # CONFIG_NETDEV_1000 is not set
 # CONFIG_NETDEV_10000 is not set
+CONFIG_PPP=y
 # CONFIG_INPUT is not set
-# CONFIG_SERIO is not set
 # CONFIG_VT is not set
 CONFIG_SERIAL_MCF=y
 CONFIG_SERIAL_MCF_CONSOLE=y
 # CONFIG_UNIX98_PTYS is not set
+# CONFIG_HW_RANDOM is not set
 # CONFIG_HWMON is not set
 # CONFIG_USB_SUPPORT is not set
 CONFIG_EXT2_FS=y
···
 CONFIG_ROMFS_BACKED_BY_MTD=y
 # CONFIG_NETWORK_FILESYSTEMS is not set
 # CONFIG_RCU_CPU_STALL_DETECTOR is not set
+CONFIG_SYSCTL_SYSCALL_CHECK=y
 CONFIG_BOOTPARAM=y
 CONFIG_BOOTPARAM_STRING="root=/dev/mtdblock0"
+# CONFIG_CRC32 is not set

arch/m68knommu/configs/m5275evb_defconfig

···
-CONFIG_EXPERIMENTAL=y
-CONFIG_LOG_BUF_SHIFT=14
-# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
-CONFIG_EXPERT=y
-# CONFIG_KALLSYMS is not set
-# CONFIG_HOTPLUG is not set
-# CONFIG_FUTEX is not set
-# CONFIG_EPOLL is not set
-# CONFIG_SIGNALFD is not set
-# CONFIG_TIMERFD is not set
-# CONFIG_EVENTFD is not set
-# CONFIG_AIO is not set
-# CONFIG_VM_EVENT_COUNTERS is not set
-# CONFIG_SLUB_DEBUG is not set
-# CONFIG_BLK_DEV_BSG is not set
-# CONFIG_IOSCHED_DEADLINE is not set
-# CONFIG_IOSCHED_CFQ is not set
-CONFIG_M5275=y
-CONFIG_CLOCK_SET=y
-CONFIG_CLOCK_FREQ=150000000
-CONFIG_CLOCK_DIV=2
-CONFIG_M5275EVB=y
-# CONFIG_4KSTACKS is not set
-CONFIG_RAMBASE=0x00000000
-CONFIG_RAMSIZE=0x00000000
-CONFIG_VECTORBASE=0x00000000
-CONFIG_KERNELBASE=0x00020000
-CONFIG_BINFMT_FLAT=y
-CONFIG_NET=y
-CONFIG_PACKET=y
-CONFIG_UNIX=y
-CONFIG_INET=y
-# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
-# CONFIG_INET_XFRM_MODE_TUNNEL is not set
-# CONFIG_INET_XFRM_MODE_BEET is not set
-# CONFIG_INET_LRO is not set
-# CONFIG_INET_DIAG is not set
-# CONFIG_IPV6 is not set
-CONFIG_MTD=y
-CONFIG_MTD_PARTITIONS=y
-CONFIG_MTD_CHAR=y
-CONFIG_MTD_BLOCK=y
-CONFIG_MTD_RAM=y
-CONFIG_MTD_UCLINUX=y
-CONFIG_BLK_DEV_RAM=y
-# CONFIG_MISC_DEVICES is not set
-CONFIG_NETDEVICES=y
-CONFIG_NET_ETHERNET=y
-CONFIG_FEC=y
-CONFIG_FEC2=y
-# CONFIG_NETDEV_1000 is not set
-# CONFIG_NETDEV_10000 is not set
-CONFIG_PPP=y
-# CONFIG_INPUT is not set
-# CONFIG_SERIO is not set
-# CONFIG_VT is not set
-CONFIG_SERIAL_MCF=y
-CONFIG_SERIAL_MCF_CONSOLE=y
-# CONFIG_UNIX98_PTYS is not set
-# CONFIG_HWMON is not set
-# CONFIG_USB_SUPPORT is not set
-CONFIG_EXT2_FS=y
-# CONFIG_FILE_LOCKING is not set
-# CONFIG_DNOTIFY is not set
-CONFIG_ROMFS_FS=y
-CONFIG_ROMFS_BACKED_BY_MTD=y
-# CONFIG_NETWORK_FILESYSTEMS is not set
-# CONFIG_RCU_CPU_STALL_DETECTOR is not set
-CONFIG_SYSCTL_SYSCALL_CHECK=y
-CONFIG_BOOTPARAM=y
-CONFIG_BOOTPARAM_STRING="root=/dev/mtdblock0"
-# CONFIG_CRC32 is not set

arch/m68knommu/configs/m5307c3_defconfig arch/m68k/configs/m5208evb_defconfig

···
+# CONFIG_MMU is not set
 CONFIG_EXPERIMENTAL=y
 CONFIG_LOG_BUF_SHIFT=14
 # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
···
 # CONFIG_EVENTFD is not set
 # CONFIG_AIO is not set
 # CONFIG_VM_EVENT_COUNTERS is not set
-# CONFIG_SLUB_DEBUG is not set
+# CONFIG_COMPAT_BRK is not set
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set
-CONFIG_M5307=y
+CONFIG_M520x=y
 CONFIG_CLOCK_SET=y
-CONFIG_CLOCK_FREQ=90000000
+CONFIG_CLOCK_FREQ=166666666
 CONFIG_CLOCK_DIV=2
-CONFIG_M5307C3=y
-CONFIG_RAMBASE=0x00000000
-CONFIG_RAMSIZE=0x00800000
-CONFIG_VECTORBASE=0x00000000
-CONFIG_KERNELBASE=0x00020000
+CONFIG_M5208EVB=y
+# CONFIG_4KSTACKS is not set
+CONFIG_RAMBASE=0x40000000
+CONFIG_RAMSIZE=0x2000000
+CONFIG_VECTORBASE=0x40000000
+CONFIG_KERNELBASE=0x40020000
+CONFIG_RAM16BIT=y
 CONFIG_BINFMT_FLAT=y
 CONFIG_NET=y
 CONFIG_PACKET=y
···
 # CONFIG_INET_LRO is not set
 # CONFIG_INET_DIAG is not set
 # CONFIG_IPV6 is not set
+# CONFIG_FW_LOADER is not set
 CONFIG_MTD=y
 CONFIG_MTD_PARTITIONS=y
 CONFIG_MTD_CHAR=y
···
 # CONFIG_MISC_DEVICES is not set
 CONFIG_NETDEVICES=y
 CONFIG_NET_ETHERNET=y
+CONFIG_FEC=y
 # CONFIG_NETDEV_1000 is not set
 # CONFIG_NETDEV_10000 is not set
-CONFIG_PPP=y
-CONFIG_SLIP=y
-CONFIG_SLIP_COMPRESSED=y
-# CONFIG_INPUT_MOUSEDEV is not set
-# CONFIG_INPUT_KEYBOARD is not set
-# CONFIG_INPUT_MOUSE is not set
+# CONFIG_INPUT is not set
 # CONFIG_SERIO is not set
 # CONFIG_VT is not set
 CONFIG_SERIAL_MCF=y
+CONFIG_SERIAL_MCF_BAUDRATE=115200
 CONFIG_SERIAL_MCF_CONSOLE=y
-# CONFIG_LEGACY_PTYS is not set
+# CONFIG_UNIX98_PTYS is not set
 # CONFIG_HW_RANDOM is not set
 # CONFIG_HWMON is not set
-# CONFIG_HID_SUPPORT is not set
 # CONFIG_USB_SUPPORT is not set
 CONFIG_EXT2_FS=y
+# CONFIG_FILE_LOCKING is not set
 # CONFIG_DNOTIFY is not set
+# CONFIG_SYSFS is not set
 CONFIG_ROMFS_FS=y
 CONFIG_ROMFS_BACKED_BY_MTD=y
 # CONFIG_NETWORK_FILESYSTEMS is not set
···
 CONFIG_FULLDEBUG=y
 CONFIG_BOOTPARAM=y
 CONFIG_BOOTPARAM_STRING="root=/dev/mtdblock0"
-# CONFIG_CRC32 is not set

arch/m68knommu/configs/m5407c3_defconfig arch/m68k/configs/m5249evb_defconfig

···
+# CONFIG_MMU is not set
 CONFIG_EXPERIMENTAL=y
 CONFIG_LOG_BUF_SHIFT=14
 # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
···
 # CONFIG_EVENTFD is not set
 # CONFIG_AIO is not set
 # CONFIG_VM_EVENT_COUNTERS is not set
-CONFIG_MODULES=y
-CONFIG_MODULE_UNLOAD=y
+# CONFIG_SLUB_DEBUG is not set
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set
-CONFIG_M5407=y
+CONFIG_M5249=y
 CONFIG_CLOCK_SET=y
-CONFIG_CLOCK_FREQ=50000000
-CONFIG_M5407C3=y
+CONFIG_CLOCK_FREQ=140000000
+CONFIG_CLOCK_DIV=2
+CONFIG_M5249C3=y
 CONFIG_RAMBASE=0x00000000
-CONFIG_RAMSIZE=0x00000000
+CONFIG_RAMSIZE=0x00800000
 CONFIG_VECTORBASE=0x00000000
 CONFIG_KERNELBASE=0x00020000
 CONFIG_BINFMT_FLAT=y
···
 # CONFIG_INET_LRO is not set
 # CONFIG_INET_DIAG is not set
 # CONFIG_IPV6 is not set
+# CONFIG_FW_LOADER is not set
 CONFIG_MTD=y
 CONFIG_MTD_PARTITIONS=y
 CONFIG_MTD_CHAR=y
···
 # CONFIG_NETDEV_10000 is not set
 CONFIG_PPP=y
 # CONFIG_INPUT is not set
+# CONFIG_SERIO is not set
 # CONFIG_VT is not set
 CONFIG_SERIAL_MCF=y
 CONFIG_SERIAL_MCF_CONSOLE=y
 # CONFIG_UNIX98_PTYS is not set
-# CONFIG_HW_RANDOM is not set
 # CONFIG_HWMON is not set
 # CONFIG_USB_SUPPORT is not set
 CONFIG_EXT2_FS=y
 # CONFIG_FILE_LOCKING is not set
-# CONFIG_DNOTIFY is not set
 CONFIG_ROMFS_FS=y
 CONFIG_ROMFS_BACKED_BY_MTD=y
 # CONFIG_NETWORK_FILESYSTEMS is not set
 # CONFIG_RCU_CPU_STALL_DETECTOR is not set
-CONFIG_SYSCTL_SYSCALL_CHECK=y
 CONFIG_BOOTPARAM=y
 CONFIG_BOOTPARAM_STRING="root=/dev/mtdblock0"
 # CONFIG_CRC32 is not set

arch/m68knommu/defconfig arch/m68k/configs/m5272c3_defconfig

···
+# CONFIG_MMU is not set
 CONFIG_EXPERIMENTAL=y
 CONFIG_LOG_BUF_SHIFT=14
 # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
···
 # CONFIG_EVENTFD is not set
 # CONFIG_AIO is not set
 # CONFIG_VM_EVENT_COUNTERS is not set
-# CONFIG_COMPAT_BRK is not set
+# CONFIG_SLUB_DEBUG is not set
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set
-CONFIG_M520x=y
+CONFIG_M5272=y
 CONFIG_CLOCK_SET=y
-CONFIG_CLOCK_FREQ=166666666
-CONFIG_CLOCK_DIV=2
-CONFIG_M5208EVB=y
-# CONFIG_4KSTACKS is not set
-CONFIG_RAMBASE=0x40000000
-CONFIG_RAMSIZE=0x2000000
-CONFIG_VECTORBASE=0x40000000
-CONFIG_KERNELBASE=0x40020000
-CONFIG_RAM16BIT=y
+CONFIG_M5272C3=y
+CONFIG_RAMBASE=0x00000000
+CONFIG_RAMSIZE=0x00800000
+CONFIG_VECTORBASE=0x00000000
+CONFIG_KERNELBASE=0x00020000
 CONFIG_BINFMT_FLAT=y
 CONFIG_NET=y
 CONFIG_PACKET=y
···
 # CONFIG_INET_LRO is not set
 # CONFIG_INET_DIAG is not set
 # CONFIG_IPV6 is not set
+# CONFIG_FW_LOADER is not set
 CONFIG_MTD=y
 CONFIG_MTD_PARTITIONS=y
 CONFIG_MTD_CHAR=y
···
 # CONFIG_SERIO is not set
 # CONFIG_VT is not set
 CONFIG_SERIAL_MCF=y
-CONFIG_SERIAL_MCF_BAUDRATE=115200
 CONFIG_SERIAL_MCF_CONSOLE=y
 # CONFIG_UNIX98_PTYS is not set
-# CONFIG_HW_RANDOM is not set
 # CONFIG_HWMON is not set
 # CONFIG_USB_SUPPORT is not set
 CONFIG_EXT2_FS=y
 # CONFIG_FILE_LOCKING is not set
 # CONFIG_DNOTIFY is not set
-# CONFIG_SYSFS is not set
 CONFIG_ROMFS_FS=y
 CONFIG_ROMFS_BACKED_BY_MTD=y
 # CONFIG_NETWORK_FILESYSTEMS is not set
 # CONFIG_RCU_CPU_STALL_DETECTOR is not set
-CONFIG_SYSCTL_SYSCALL_CHECK=y
-CONFIG_FULLDEBUG=y
 CONFIG_BOOTPARAM=y
 CONFIG_BOOTPARAM_STRING="root=/dev/mtdblock0"

arch/m68knommu/kernel/.gitignore

···
-vmlinux.lds

arch/m68knommu/lib/ashldi3.c arch/m68k/lib/muldi3_mm.c

···
-/* ashrdi3.c extracted from gcc-2.95.2/libgcc2.c which is: */
-/* Copyright (C) 1989, 92-98, 1999 Free Software Foundation, Inc.
+/* muldi3.c extracted from gcc-2.7.2.3/libgcc2.c and
+			   gcc-2.7.2.3/longlong.h which is: */
+/* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
···
 
 #define BITS_PER_UNIT 8
 
-typedef 	 int SItype	__attribute__ ((mode (SI)));
+#define umul_ppmm(w1, w0, u, v) \
+  __asm__ ("mulu%.l %3,%1:%0"						\
+           : "=d" ((USItype)(w0)),					\
+             "=d" ((USItype)(w1))					\
+           : "%0" ((USItype)(u)),					\
+             "dmi" ((USItype)(v)))
+
+#define __umulsidi3(u, v) \
+  ({DIunion __w;							\
+    umul_ppmm (__w.s.high, __w.s.low, u, v);				\
+    __w.ll; })
+
+typedef		 int SItype	__attribute__ ((mode (SI)));
 typedef unsigned int USItype	__attribute__ ((mode (SI)));
 typedef		 int DItype	__attribute__ ((mode (DI)));
 typedef int word_type __attribute__ ((mode (__word__)));
···
 } DIunion;
 
 DItype
-__ashldi3 (DItype u, word_type b)
+__muldi3 (DItype u, DItype v)
 {
   DIunion w;
-  word_type bm;
-  DIunion uu;
+  DIunion uu, vv;
 
-  if (b == 0)
-    return u;
+  uu.ll = u,
+  vv.ll = v;
 
-  uu.ll = u;
-
-  bm = (sizeof (SItype) * BITS_PER_UNIT) - b;
-  if (bm <= 0)
-    {
-      w.s.low = 0;
-      w.s.high = (USItype)uu.s.low << -bm;
-    }
-  else
-    {
-      USItype carries = (USItype)uu.s.low >> bm;
-      w.s.low = (USItype)uu.s.low << b;
-      w.s.high = ((USItype)uu.s.high << b) | carries;
-    }
+  w.ll = __umulsidi3 (uu.s.low, vv.s.low);
+  w.s.high += ((USItype) uu.s.low * (USItype) vv.s.high
+	       + (USItype) uu.s.high * (USItype) vv.s.low);
 
   return w.ll;
 }

arch/m68knommu/lib/ashrdi3.c

···
-/* ashrdi3.c extracted from gcc-2.7.2/libgcc2.c which is: */
-/* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
-
-This file is part of GNU CC.
-
-GNU CC is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU CC is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING.  If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA.  */
-
-#define BITS_PER_UNIT 8
-
-typedef 	 int SItype	__attribute__ ((mode (SI)));
-typedef unsigned int USItype	__attribute__ ((mode (SI)));
-typedef		 int DItype	__attribute__ ((mode (DI)));
-typedef int word_type __attribute__ ((mode (__word__)));
-
-struct DIstruct {SItype high, low;};
-
-typedef union
-{
-  struct DIstruct s;
-  DItype ll;
-} DIunion;
-
-DItype
-__ashrdi3 (DItype u, word_type b)
-{
-  DIunion w;
-  word_type bm;
-  DIunion uu;
-
-  if (b == 0)
-    return u;
-
-  uu.ll = u;
-
-  bm = (sizeof (SItype) * BITS_PER_UNIT) - b;
-  if (bm <= 0)
-    {
-      /* w.s.high = 1..1 or 0..0 */
-      w.s.high = uu.s.high >> (sizeof (SItype) * BITS_PER_UNIT - 1);
-      w.s.low = uu.s.high >> -bm;
-    }
-  else
-    {
-      USItype carries = (USItype)uu.s.high << bm;
-      w.s.high = uu.s.high >> b;
-      w.s.low = ((USItype)uu.s.low >> b) | carries;
-    }
-
-  return w.ll;
-}

arch/m68knommu/lib/lshrdi3.c

···
-/* lshrdi3.c extracted from gcc-2.7.2/libgcc2.c which is: */
-/* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
-
-This file is part of GNU CC.
-
-GNU CC is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU CC is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING.  If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA.  */
-
-#define BITS_PER_UNIT 8
-
-typedef 	 int SItype	__attribute__ ((mode (SI)));
-typedef unsigned int USItype	__attribute__ ((mode (SI)));
-typedef		 int DItype	__attribute__ ((mode (DI)));
-typedef int word_type __attribute__ ((mode (__word__)));
-
-struct DIstruct {SItype high, low;};
-
-typedef union
-{
-  struct DIstruct s;
-  DItype ll;
-} DIunion;
-
-DItype
-__lshrdi3 (DItype u, word_type b)
-{
-  DIunion w;
-  word_type bm;
-  DIunion uu;
-
-  if (b == 0)
-    return u;
-
-  uu.ll = u;
-
-  bm = (sizeof (SItype) * BITS_PER_UNIT) - b;
-  if (bm <= 0)
-    {
-      w.s.high = 0;
-      w.s.low = (USItype)uu.s.high >> -bm;
-    }
-  else
-    {
-      USItype carries = (USItype)uu.s.high << bm;
-      w.s.high = (USItype)uu.s.high >> b;
-      w.s.low = ((USItype)uu.s.low >> b) | carries;
-    }
-
-  return w.ll;
-}