tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#
2# This file is subject to the terms and conditions of the GNU General Public
3# License. See the file "COPYING" in the main directory of this archive
4# for more details.
5#
6# Copyright (C) 1994, 95, 96, 2003 by Ralf Baechle
7# DECStation modifications by Paul M. Antoine, 1996
8# Copyright (C) 2002, 2003, 2004 Maciej W. Rozycki
9#
10# This file is included by the global makefile so that you can add your own
11# architecture-specific flags and dependencies.
12#
13
14archscripts: scripts_basic
15 $(Q)$(MAKE) $(build)=arch/mips/tools elf-entry
16ifeq ($(CONFIG_CPU_LOONGSON3_WORKAROUNDS),y)
17 $(Q)$(MAKE) $(build)=arch/mips/tools loongson3-llsc-check
18endif
19 $(Q)$(MAKE) $(build)=arch/mips/boot/tools relocs
20
21KBUILD_DEFCONFIG := 32r2el_defconfig
22KBUILD_DTBS := dtbs
23
24#
25# Select the object file format to substitute into the linker script.
26#
27ifdef CONFIG_CPU_LITTLE_ENDIAN
2832bit-tool-archpref = mipsel
2964bit-tool-archpref = mips64el
3032bit-bfd = elf32-tradlittlemips
3164bit-bfd = elf64-tradlittlemips
3232bit-emul = elf32ltsmip
3364bit-emul = elf64ltsmip
34else
3532bit-tool-archpref = mips
3664bit-tool-archpref = mips64
3732bit-bfd = elf32-tradbigmips
3864bit-bfd = elf64-tradbigmips
3932bit-emul = elf32btsmip
4064bit-emul = elf64btsmip
41endif
42
43ifdef CONFIG_32BIT
44tool-archpref = $(32bit-tool-archpref)
45UTS_MACHINE := mips
46endif
47ifdef CONFIG_64BIT
48tool-archpref = $(64bit-tool-archpref)
49UTS_MACHINE := mips64
50endif
51
52ifdef cross_compiling
53 ifeq ($(CROSS_COMPILE),)
54 CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-)
55 endif
56endif
57
58ifdef CONFIG_FUNCTION_GRAPH_TRACER
59 ifndef KBUILD_MCOUNT_RA_ADDRESS
60 ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
61 cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
62 endif
63 endif
64endif
65cflags-y += $(call cc-option, -mno-check-zero-division)
66
67ifdef CONFIG_32BIT
68ld-emul = $(32bit-emul)
69vmlinux-32 = vmlinux
70vmlinux-64 = vmlinux.64
71
72cflags-y += -mabi=32
73endif
74
75ifdef CONFIG_64BIT
76ld-emul = $(64bit-emul)
77vmlinux-32 = vmlinux.32
78vmlinux-64 = vmlinux
79
80cflags-y += -mabi=64
81endif
82
83all-$(CONFIG_BOOT_ELF32) := $(vmlinux-32)
84all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64)
85all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
86
87#
88# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
89# code since it only slows down the whole thing. At some point we might make
90# use of global pointer optimizations but their use of $28 conflicts with
91# the current pointer optimization.
92#
93# The DECStation requires an ECOFF kernel for remote booting, other MIPS
94# machines may also. Since BFD is incredibly buggy with respect to
95# crossformat linking we rely on the elf2ecoff tool for format conversion.
96#
97cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
98cflags-y += -msoft-float -Wa,-msoft-float
99LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
100KBUILD_AFLAGS_MODULE += -mlong-calls
101KBUILD_CFLAGS_MODULE += -mlong-calls
102
103ifeq ($(CONFIG_RELOCATABLE),y)
104LDFLAGS_vmlinux += --emit-relocs
105endif
106
107cflags-y += -ffreestanding
108
109cflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
110cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -EL
111
112cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
113 -fno-omit-frame-pointer
114
115# Some distribution-specific toolchains might pass the -fstack-check
116# option during the build, which adds a simple stack-probe at the beginning
117# of every function. This stack probe is to ensure that there is enough
118# stack space, else a SEGV is generated. This is not desirable for MIPS
119# as kernel stacks are small, placed in unmapped virtual memory, and do not
120# grow when overflowed. Especially on SGI IP27 platforms, this check will
121# lead to a NULL pointer dereference in _raw_spin_lock_irq.
122#
123# In disassembly, this stack probe appears at the top of a function as:
124# sd zero,<offset>(sp)
125# Where <offset> is a negative value.
126#
127cflags-y += -fno-stack-check
128
129# binutils from v2.35 when built with --enable-mips-fix-loongson3-llsc=yes,
130# supports an -mfix-loongson3-llsc flag which emits a sync prior to each ll
131# instruction to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h
132# for a description).
133#
134# We disable this in order to prevent the assembler meddling with the
135# instruction that labels refer to, ie. if we label an ll instruction:
136#
137# 1: ll v0, 0(a0)
138#
139# ...then with the assembler fix applied the label may actually point at a sync
140# instruction inserted by the assembler, and if we were using the label in an
141# exception table the table would no longer contain the address of the ll
142# instruction.
143#
144# Avoid this by explicitly disabling that assembler behaviour.
145#
146cflags-y += $(call cc-option,-Wa$(comma)-mno-fix-loongson3-llsc,)
147
148#
149# CPU-dependent compiler/assembler options for optimization.
150#
151cflags-$(CONFIG_CPU_R3000) += -march=r3000
152cflags-$(CONFIG_CPU_R4300) += -march=r4300 -Wa,--trap
153cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap
154cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap
155cflags-$(CONFIG_CPU_MIPS32_R1) += -march=mips32 -Wa,--trap
156cflags-$(CONFIG_CPU_MIPS32_R2) += -march=mips32r2 -Wa,--trap
157cflags-$(CONFIG_CPU_MIPS32_R5) += -march=mips32r5 -Wa,--trap -modd-spreg
158cflags-$(CONFIG_CPU_MIPS32_R6) += -march=mips32r6 -Wa,--trap -modd-spreg
159cflags-$(CONFIG_CPU_MIPS64_R1) += -march=mips64 -Wa,--trap
160cflags-$(CONFIG_CPU_MIPS64_R2) += -march=mips64r2 -Wa,--trap
161cflags-$(CONFIG_CPU_MIPS64_R5) += -march=mips64r5 -Wa,--trap
162cflags-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,--trap
163cflags-$(CONFIG_CPU_P5600) += -march=p5600 -Wa,--trap -modd-spreg
164cflags-$(CONFIG_CPU_R5000) += -march=r5000 -Wa,--trap
165cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=r5000) \
166 -Wa,--trap
167cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=r5000) \
168 -Wa,--trap
169cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=r5000) \
170 -Wa,--trap
171cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=r5000) \
172 -Wa,--trap
173cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mdmx)
174cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mips3d)
175cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=r8000) \
176 -Wa,--trap
177cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
178ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
179cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
180endif
181cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
182cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,-mips32 -Wa,--trap
183
184cflags-$(CONFIG_CPU_LOONGSON2E) += $(call cc-option,-march=loongson2e) -Wa,--trap
185cflags-$(CONFIG_CPU_LOONGSON2F) += $(call cc-option,-march=loongson2f) -Wa,--trap
186cflags-$(CONFIG_CPU_LOONGSON64) += $(call cc-option,-march=loongson3a,-march=mips64r2) -Wa,--trap
187# Some -march= flags enable MMI instructions, and GCC complains about that
188# support being enabled alongside -msoft-float. Thus explicitly disable MMI.
189cflags-$(CONFIG_CPU_LOONGSON2EF) += $(call cc-option,-mno-loongson-mmi)
190cflags-$(CONFIG_CPU_LOONGSON64) += $(call cc-option,-mno-loongson-mmi)
191
192cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,)
193cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,)
194cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)
195ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS
196cflags-$(CONFIG_CPU_NOP_WORKAROUNDS) += -Wa,-mfix-loongson2f-nop
197cflags-$(CONFIG_CPU_JUMP_WORKAROUNDS) += -Wa,-mfix-loongson2f-jump
198endif
199
200#
201# Some versions of binutils, not currently mainline as of 2019/02/04, support
202# an -mfix-loongson3-llsc flag which emits a sync prior to each ll instruction
203# to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h for a
204# description).
205#
206# We disable this in order to prevent the assembler meddling with the
207# instruction that labels refer to, ie. if we label an ll instruction:
208#
209# 1: ll v0, 0(a0)
210#
211# ...then with the assembler fix applied the label may actually point at a sync
212# instruction inserted by the assembler, and if we were using the label in an
213# exception table the table would no longer contain the address of the ll
214# instruction.
215#
216# Avoid this by explicitly disabling that assembler behaviour. If upstream
217# binutils does not merge support for the flag then we can revisit & remove
218# this later - for now it ensures vendor toolchains don't cause problems.
219#
220cflags-$(CONFIG_CPU_LOONGSON64) += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,)
221
222# For smartmips configurations, there are hundreds of warnings due to ISA overrides
223# in assembly and header files. smartmips is only supported for MIPS32r1 onwards
224# and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
225# similar directives in the kernel will spam the build logs with the following warnings:
226# Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
227# or
228# Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
229# Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
230# been fixed properly.
231mips-cflags := $(cflags-y)
232ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
233smartmips-ase := $(call cc-option-yn,$(mips-cflags) -msmartmips)
234cflags-$(smartmips-ase) += -msmartmips -Wa,--no-warn
235endif
236ifeq ($(CONFIG_CPU_MICROMIPS),y)
237micromips-ase := $(call cc-option-yn,$(mips-cflags) -mmicromips)
238cflags-$(micromips-ase) += -mmicromips
239endif
240ifeq ($(CONFIG_CPU_HAS_MSA),y)
241toolchain-msa := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
242cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA
243endif
244toolchain-virt := $(call cc-option-yn,$(mips-cflags) -mvirt)
245cflags-$(toolchain-virt) += -DTOOLCHAIN_SUPPORTS_VIRT
246# For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which
247# only warns
248xpa-cflags-y := $(mips-cflags)
249xpa-cflags-$(micromips-ase) += -mmicromips -Wa$(comma)-fatal-warnings
250toolchain-xpa := $(call cc-option-yn,$(xpa-cflags-y) -mxpa)
251cflags-$(toolchain-xpa) += -DTOOLCHAIN_SUPPORTS_XPA
252toolchain-crc := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc)
253cflags-$(toolchain-crc) += -DTOOLCHAIN_SUPPORTS_CRC
254toolchain-dsp := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp)
255cflags-$(toolchain-dsp) += -DTOOLCHAIN_SUPPORTS_DSP
256toolchain-ginv := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mginv)
257cflags-$(toolchain-ginv) += -DTOOLCHAIN_SUPPORTS_GINV
258
259#
260# Firmware support
261#
262libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc/
263libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/
264libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/
265libs-y += arch/mips/fw/lib/
266
267#
268# Kernel compression
269#
270ifdef CONFIG_SYS_SUPPORTS_ZBOOT
271COMPRESSION_FNAME = vmlinuz
272else
273COMPRESSION_FNAME = vmlinux
274endif
275
276#
277# Board-dependent options and extra files
278#
279include $(srctree)/arch/mips/Kbuild.platforms
280
281ifdef CONFIG_PHYSICAL_START
282load-y = $(CONFIG_PHYSICAL_START)
283endif
284
285entry-y = $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux)
286cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic
287drivers-$(CONFIG_PCI) += arch/mips/pci/
288
289#
290# Automatically detect the build format. By default we choose
291# the elf format according to the load address.
292# We can always force a build with a 64-bits symbol format by
293# passing 'KBUILD_SYM32=no' option to the make's command line.
294#
295ifdef CONFIG_64BIT
296 ifndef KBUILD_SYM32
297 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
298 KBUILD_SYM32 = y
299 endif
300 endif
301
302 ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
303 cflags-y += -msym32 -DKBUILD_64BIT_SYM32
304 else
305 ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
306 $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
307 endif
308 endif
309endif
310
311# When linking a 32-bit executable the LLVM linker cannot cope with a
312# 32-bit load address that has been sign-extended to 64 bits. Simply
313# remove the upper 32 bits then, as it is safe to do so with other
314# linkers.
315ifdef CONFIG_64BIT
316 load-ld = $(load-y)
317else
318 load-ld = $(subst 0xffffffff,0x,$(load-y))
319endif
320
321KBUILD_AFLAGS += $(cflags-y)
322KBUILD_CFLAGS += $(cflags-y)
323KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) -DLINKER_LOAD_ADDRESS=$(load-ld)
324KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
325
326bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \
327 LINKER_LOAD_ADDRESS=$(load-ld) \
328 VMLINUX_ENTRY_ADDRESS=$(entry-y) \
329 PLATFORM="$(platform-y)" \
330 ITS_INPUTS="$(its-y)"
331ifdef CONFIG_32BIT
332bootvars-y += ADDR_BITS=32
333endif
334ifdef CONFIG_64BIT
335bootvars-y += ADDR_BITS=64
336endif
337
338# This is required to get dwarf unwinding tables into .debug_frame
339# instead of .eh_frame so we don't discard them.
340KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
341
342KBUILD_LDFLAGS += -m $(ld-emul)
343
344ifdef CONFIG_MIPS
345CHECKFLAGS += $(shell $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
346 grep -E -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \
347 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
348endif
349
350OBJCOPYFLAGS += --remove-section=.reginfo
351
352libs-y += arch/mips/lib/
353libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/
354
355drivers-y += arch/mips/crypto/
356
357# suspend and hibernation support
358drivers-$(CONFIG_PM) += arch/mips/power/
359
360# boot image targets (arch/mips/boot/)
361boot-y := vmlinux.bin
362boot-y += vmlinux.ecoff
363boot-y += vmlinux.srec
364boot-y += uImage
365boot-y += uImage.bin
366boot-y += uImage.bz2
367boot-y += uImage.gz
368boot-y += uImage.lzma
369boot-y += uImage.lzo
370boot-y += vmlinux.itb
371boot-y += vmlinux.gz.itb
372boot-y += vmlinux.bz2.itb
373boot-y += vmlinux.lzma.itb
374boot-y += vmlinux.lzo.itb
375
376# compressed boot image targets (arch/mips/boot/compressed/)
377bootz-y := vmlinuz
378bootz-y += vmlinuz.bin
379bootz-y += vmlinuz.ecoff
380bootz-y += vmlinuz.srec
381bootz-y += uzImage.bin
382bootz-y += vmlinuz.itb
383
384#
385# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
386# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
387# convert to ECOFF using elf2ecoff.
388#
389quiet_cmd_32 = OBJCOPY $@
390 cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
391vmlinux.32: vmlinux
392 $(call cmd,32)
393
394#
395# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
396# ELF files from 32-bit files by conversion.
397#
398quiet_cmd_64 = OBJCOPY $@
399 cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
400vmlinux.64: vmlinux
401 $(call cmd,64)
402
403all: $(all-y) $(KBUILD_DTBS)
404
405# boot
406$(boot-y): $(vmlinux-32) FORCE
407 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
408 $(bootvars-y) arch/mips/boot/$@
409
410ifdef CONFIG_SYS_SUPPORTS_ZBOOT
411# boot/compressed
412$(bootz-y): $(vmlinux-32) FORCE
413 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
414 $(bootvars-y) 32bit-bfd=$(32bit-bfd) arch/mips/boot/$@
415else
416vmlinuz: FORCE
417 @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
418 /bin/false
419endif
420
421
422CLEAN_FILES += vmlinux.32 vmlinux.64
423
424# device-trees
425core-y += arch/mips/boot/dts/
426
427archprepare:
428ifdef CONFIG_MIPS32_N32
429 @$(kecho) ' Checking missing-syscalls for N32'
430 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
431endif
432ifdef CONFIG_MIPS32_O32
433 @$(kecho) ' Checking missing-syscalls for O32'
434 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
435endif
436
437install:
438 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
439ifdef CONFIG_SYS_SUPPORTS_ZBOOT
440 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
441endif
442 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
443 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
444
445archheaders:
446 $(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all
447
448define archhelp
449 echo ' install - install kernel into $(INSTALL_PATH)'
450 echo ' vmlinux.ecoff - ECOFF boot image'
451 echo ' vmlinux.bin - Raw binary boot image'
452 echo ' vmlinux.srec - SREC boot image'
453 echo ' vmlinux.32 - 64-bit boot image wrapped in 32bits (IP22/IP32)'
454 echo ' vmlinuz - Compressed boot(zboot) image'
455 echo ' vmlinuz.ecoff - ECOFF zboot image'
456 echo ' vmlinuz.bin - Raw binary zboot image'
457 echo ' vmlinuz.srec - SREC zboot image'
458 echo ' uImage - U-Boot image'
459 echo ' uImage.bin - U-Boot image (uncompressed)'
460 echo ' uImage.bz2 - U-Boot image (bz2)'
461 echo ' uImage.gz - U-Boot image (gzip)'
462 echo ' uImage.lzma - U-Boot image (lzma)'
463 echo ' uImage.lzo - U-Boot image (lzo)'
464 echo ' uzImage.bin - U-Boot image (self-extracting)'
465 echo
466 echo ' These will be default as appropriate for a configured platform.'
467 echo
468 echo ' If you are targeting a system supported by generic kernels you may'
469 echo ' configure the kernel for a given architecture target like so:'
470 echo
471 echo ' {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
472 echo
473 echo ' Where BOARDS is some subset of the following:'
474 for board in $(sort $(BOARDS)); do echo " $${board}"; done
475 echo
476 echo ' Specifically the following generic default configurations are'
477 echo ' supported:'
478 echo
479 $(foreach cfg,$(generic_defconfigs),
480 printf " %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);)
481 echo
482 echo ' The following legacy default configurations have been converted to'
483 echo ' generic and can still be used:'
484 echo
485 $(foreach cfg,$(sort $(legacy_defconfigs)),
486 printf " %-24s - Build $($(cfg)-y)\n" $(cfg);)
487 echo
488 echo ' Otherwise, the following default configurations are available:'
489endef
490
491generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
492generic_defconfigs :=
493
494#
495# If the user generates a generic kernel configuration without specifying a
496# list of boards to include the config fragments for, default to including all
497# available board config fragments.
498#
499ifeq ($(BOARDS),)
500BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
501endif
502
503#
504# Generic kernel configurations which merge generic_defconfig with the
505# appropriate config fragments from arch/mips/configs/generic/, resulting in
506# the ability to easily configure the kernel for a given architecture,
507# endianness & set of boards without duplicating the needed configuration in
508# hundreds of defconfig files.
509#
510define gen_generic_defconfigs
511$(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
512target := $(bits)$(rev)$(filter el,$(endian))_defconfig
513generic_defconfigs += $$(target)
514$$(target): $(generic_config_dir)/$(bits)$(rev).config
515$$(target): $(generic_config_dir)/$(endian).config
516)))
517endef
518
519$(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
520$(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
521
522define describe_generic_defconfig
523$(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1)))))
524endef
525
526.PHONY: $(generic_defconfigs)
527$(generic_defconfigs):
528 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
529 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
530 grep -Ev '^#'
531 $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
532 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
533 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
534 $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
535 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
536 "$(origin BOARDS)" $(BOARDS)
537 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
538
539#
540# Prevent generic merge_config rules attempting to merge single fragments
541#
542$(generic_config_dir)/%.config: ;
543
544#
545# Prevent direct use of generic_defconfig, which is intended to be used as the
546# basis of the various ISA-specific targets generated above.
547#
548.PHONY: generic_defconfig
549generic_defconfig:
550 $(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
551 $(Q)echo "used via an ISA-specific target from the following list:"
552 $(Q)echo
553 $(Q)for cfg in $(generic_defconfigs); do echo " $${cfg}"; done
554 $(Q)echo
555 $(Q)false
556
557#
558# Legacy defconfig compatibility - these targets used to be real defconfigs but
559# now that the boards have been converted to use the generic kernel they are
560# wrappers around the generic rules above.
561#
562legacy_defconfigs += ocelot_defconfig
563ocelot_defconfig-y := 32r2el_defconfig BOARDS=ocelot
564
565legacy_defconfigs += sead3_defconfig
566sead3_defconfig-y := 32r2el_defconfig BOARDS=sead-3
567
568legacy_defconfigs += sead3micro_defconfig
569sead3micro_defconfig-y := micro32r2el_defconfig BOARDS=sead-3
570
571legacy_defconfigs += xilfpga_defconfig
572xilfpga_defconfig-y := 32r2el_defconfig BOARDS=xilfpga
573
574legacy_defconfigs += pistachio_defconfig
575pistachio_defconfig-y := 32r2el_defconfig BOARDS=marduk
576
577.PHONY: $(legacy_defconfigs)
578$(legacy_defconfigs):
579 $(Q)$(MAKE) -f $(srctree)/Makefile $($@-y)