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. Remember to do have actions
12# for "archclean" cleaning up for this architecture.
13#
14
15archscripts: scripts_basic
16 $(Q)$(MAKE) $(build)=arch/mips/boot/tools relocs
17
18KBUILD_DEFCONFIG := ip22_defconfig
19
20#
21# Select the object file format to substitute into the linker script.
22#
23ifdef CONFIG_CPU_LITTLE_ENDIAN
2432bit-tool-archpref = mipsel
2564bit-tool-archpref = mips64el
2632bit-bfd = elf32-tradlittlemips
2764bit-bfd = elf64-tradlittlemips
2832bit-emul = elf32ltsmip
2964bit-emul = elf64ltsmip
30else
3132bit-tool-archpref = mips
3264bit-tool-archpref = mips64
3332bit-bfd = elf32-tradbigmips
3464bit-bfd = elf64-tradbigmips
3532bit-emul = elf32btsmip
3664bit-emul = elf64btsmip
37endif
38
39ifdef CONFIG_32BIT
40tool-archpref = $(32bit-tool-archpref)
41UTS_MACHINE := mips
42endif
43ifdef CONFIG_64BIT
44tool-archpref = $(64bit-tool-archpref)
45UTS_MACHINE := mips64
46endif
47
48ifneq ($(SUBARCH),$(ARCH))
49 ifeq ($(CROSS_COMPILE),)
50 CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-)
51 endif
52endif
53
54ifdef CONFIG_FUNCTION_GRAPH_TRACER
55 ifndef KBUILD_MCOUNT_RA_ADDRESS
56 ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
57 cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
58 endif
59 endif
60endif
61cflags-y += $(call cc-option, -mno-check-zero-division)
62
63ifdef CONFIG_32BIT
64ld-emul = $(32bit-emul)
65vmlinux-32 = vmlinux
66vmlinux-64 = vmlinux.64
67
68cflags-y += -mabi=32
69endif
70
71ifdef CONFIG_64BIT
72ld-emul = $(64bit-emul)
73vmlinux-32 = vmlinux.32
74vmlinux-64 = vmlinux
75
76cflags-y += -mabi=64
77endif
78
79all-$(CONFIG_BOOT_ELF32) := $(vmlinux-32)
80all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64)
81all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
82
83#
84# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
85# code since it only slows down the whole thing. At some point we might make
86# use of global pointer optimizations but their use of $28 conflicts with
87# the current pointer optimization.
88#
89# The DECStation requires an ECOFF kernel for remote booting, other MIPS
90# machines may also. Since BFD is incredibly buggy with respect to
91# crossformat linking we rely on the elf2ecoff tool for format conversion.
92#
93cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
94cflags-y += -msoft-float
95LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
96KBUILD_AFLAGS_MODULE += -mlong-calls
97KBUILD_CFLAGS_MODULE += -mlong-calls
98
99ifeq ($(CONFIG_RELOCATABLE),y)
100LDFLAGS_vmlinux += --emit-relocs
101endif
102
103#
104# pass -msoft-float to GAS if it supports it. However on newer binutils
105# (specifically newer than 2.24.51.20140728) we then also need to explicitly
106# set ".set hardfloat" in all files which manipulate floating point registers.
107#
108ifneq ($(call as-option,-Wa$(comma)-msoft-float,),)
109 cflags-y += -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float
110endif
111
112cflags-y += -ffreestanding
113
114#
115# We explicitly add the endianness specifier if needed, this allows
116# to compile kernels with a toolchain for the other endianness. We
117# carefully avoid to add it redundantly because gcc 3.3/3.4 complains
118# when fed the toolchain default!
119#
120# Certain gcc versions up to gcc 4.1.1 (probably 4.2-subversion as of
121# 2006-10-10 don't properly change the predefined symbols if -EB / -EL
122# are used, so we kludge that here. A bug has been filed at
123# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.
124#
125undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
126undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
127predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
128predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
129cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be))
130cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le))
131
132cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
133 -fno-omit-frame-pointer
134#
135# CPU-dependent compiler/assembler options for optimization.
136#
137cflags-$(CONFIG_CPU_R3000) += -march=r3000
138cflags-$(CONFIG_CPU_TX39XX) += -march=r3900
139cflags-$(CONFIG_CPU_R6000) += -march=r6000 -Wa,--trap
140cflags-$(CONFIG_CPU_R4300) += -march=r4300 -Wa,--trap
141cflags-$(CONFIG_CPU_VR41XX) += -march=r4100 -Wa,--trap
142cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap
143cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap
144cflags-$(CONFIG_CPU_MIPS32_R1) += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
145 -Wa,-mips32 -Wa,--trap
146cflags-$(CONFIG_CPU_MIPS32_R2) += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
147 -Wa,-mips32r2 -Wa,--trap
148cflags-$(CONFIG_CPU_MIPS32_R6) += -march=mips32r6 -Wa,--trap
149cflags-$(CONFIG_CPU_MIPS64_R1) += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
150 -Wa,-mips64 -Wa,--trap
151cflags-$(CONFIG_CPU_MIPS64_R2) += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
152 -Wa,-mips64r2 -Wa,--trap
153cflags-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,--trap
154cflags-$(CONFIG_CPU_R5000) += -march=r5000 -Wa,--trap
155cflags-$(CONFIG_CPU_R5432) += $(call cc-option,-march=r5400,-march=r5000) \
156 -Wa,--trap
157cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=r5000) \
158 -Wa,--trap
159cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=r5000) \
160 -Wa,--trap
161cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=r5000) \
162 -Wa,--trap
163cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=r5000) \
164 -Wa,--trap
165cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mdmx)
166cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mips3d)
167cflags-$(CONFIG_CPU_R8000) += -march=r8000 -Wa,--trap
168cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=r8000) \
169 -Wa,--trap
170cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
171ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
172cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
173endif
174cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
175cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,-mips32 -Wa,--trap
176
177cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,)
178cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,)
179cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)
180
181# For smartmips configurations, there are hundreds of warnings due to ISA overrides
182# in assembly and header files. smartmips is only supported for MIPS32r1 onwards
183# and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
184# similar directives in the kernel will spam the build logs with the following warnings:
185# Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
186# or
187# Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
188# Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
189# been fixed properly.
190mips-cflags := $(cflags-y)
191ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
192smartmips-ase := $(call cc-option-yn,$(mips-cflags) -msmartmips)
193cflags-$(smartmips-ase) += -msmartmips -Wa,--no-warn
194endif
195ifeq ($(CONFIG_CPU_MICROMIPS),y)
196micromips-ase := $(call cc-option-yn,$(mips-cflags) -mmicromips)
197cflags-$(micromips-ase) += -mmicromips
198endif
199ifeq ($(CONFIG_CPU_HAS_MSA),y)
200toolchain-msa := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
201cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA
202endif
203toolchain-virt := $(call cc-option-yn,$(mips-cflags) -mvirt)
204cflags-$(toolchain-virt) += -DTOOLCHAIN_SUPPORTS_VIRT
205
206#
207# Firmware support
208#
209libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc/
210libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/
211libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/
212libs-y += arch/mips/fw/lib/
213
214#
215# Kernel compression
216#
217ifdef SYS_SUPPORTS_ZBOOT
218COMPRESSION_FNAME = vmlinuz
219else
220COMPRESSION_FNAME = vmlinux
221endif
222
223#
224# Board-dependent options and extra files
225#
226include arch/mips/Kbuild.platforms
227
228ifdef CONFIG_PHYSICAL_START
229load-y = $(CONFIG_PHYSICAL_START)
230endif
231entry-y = 0x$(shell $(NM) vmlinux 2>/dev/null \
232 | grep "\bkernel_entry\b" | cut -f1 -d \ )
233
234cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic
235drivers-$(CONFIG_PCI) += arch/mips/pci/
236
237#
238# Automatically detect the build format. By default we choose
239# the elf format according to the load address.
240# We can always force a build with a 64-bits symbol format by
241# passing 'KBUILD_SYM32=no' option to the make's command line.
242#
243ifdef CONFIG_64BIT
244 ifndef KBUILD_SYM32
245 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
246 KBUILD_SYM32 = y
247 endif
248 endif
249
250 ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
251 cflags-y += -msym32 -DKBUILD_64BIT_SYM32
252 else
253 ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
254 $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
255 endif
256 endif
257endif
258
259KBUILD_AFLAGS += $(cflags-y)
260KBUILD_CFLAGS += $(cflags-y)
261KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
262KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
263
264bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \
265 VMLINUX_ENTRY_ADDRESS=$(entry-y)
266
267LDFLAGS += -m $(ld-emul)
268
269ifdef CONFIG_MIPS
270CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
271 egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
272 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
273ifdef CONFIG_64BIT
274CHECKFLAGS += -m64
275endif
276endif
277
278OBJCOPYFLAGS += --remove-section=.reginfo
279
280head-y := arch/mips/kernel/head.o
281
282libs-y += arch/mips/lib/
283libs-y += arch/mips/math-emu/
284
285# See arch/mips/Kbuild for content of core part of the kernel
286core-y += arch/mips/
287
288drivers-$(CONFIG_OPROFILE) += arch/mips/oprofile/
289
290# suspend and hibernation support
291drivers-$(CONFIG_PM) += arch/mips/power/
292
293# boot image targets (arch/mips/boot/)
294boot-y := vmlinux.bin
295boot-y += vmlinux.ecoff
296boot-y += vmlinux.srec
297ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
298boot-y += uImage
299boot-y += uImage.bin
300boot-y += uImage.bz2
301boot-y += uImage.gz
302boot-y += uImage.lzma
303boot-y += uImage.lzo
304endif
305
306# compressed boot image targets (arch/mips/boot/compressed/)
307bootz-y := vmlinuz
308bootz-y += vmlinuz.bin
309bootz-y += vmlinuz.ecoff
310bootz-y += vmlinuz.srec
311
312ifdef CONFIG_LASAT
313rom.bin rom.sw: vmlinux
314 $(Q)$(MAKE) $(build)=arch/mips/lasat/image \
315 $(bootvars-y) $@
316endif
317
318CMD_RELOCS = arch/mips/boot/tools/relocs
319quiet_cmd_relocs = RELOCS $<
320 cmd_relocs = $(CMD_RELOCS) $<
321
322#
323# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
324# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
325# convert to ECOFF using elf2ecoff.
326#
327quiet_cmd_32 = OBJCOPY $@
328 cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
329vmlinux.32: vmlinux
330ifeq ($(CONFIG_RELOCATABLE)$(CONFIG_64BIT),yy)
331# Currently, objcopy fails to handle the relocations in the elf64
332# So the relocs tool must be run here to remove them first
333 $(call cmd,relocs)
334endif
335 $(call cmd,32)
336
337#
338# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
339# ELF files from 32-bit files by conversion.
340#
341quiet_cmd_64 = OBJCOPY $@
342 cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
343vmlinux.64: vmlinux
344 $(call cmd,64)
345
346all: $(all-y)
347
348# boot
349$(boot-y): $(vmlinux-32) FORCE
350ifeq ($(CONFIG_RELOCATABLE)$(CONFIG_32BIT),yy)
351 $(call cmd,relocs)
352endif
353 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
354 $(bootvars-y) arch/mips/boot/$@
355
356ifdef CONFIG_SYS_SUPPORTS_ZBOOT
357# boot/compressed
358$(bootz-y): $(vmlinux-32) FORCE
359 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
360 $(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
361else
362vmlinuz: FORCE
363 @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
364 /bin/false
365endif
366
367
368CLEAN_FILES += vmlinux.32 vmlinux.64
369
370# device-trees
371core-$(CONFIG_BUILTIN_DTB) += arch/mips/boot/dts/
372
373%.dtb %.dtb.S %.dtb.o: | scripts
374 $(Q)$(MAKE) $(build)=arch/mips/boot/dts arch/mips/boot/dts/$@
375
376PHONY += dtbs
377dtbs: scripts
378 $(Q)$(MAKE) $(build)=arch/mips/boot/dts
379
380PHONY += dtbs_install
381dtbs_install:
382 $(Q)$(MAKE) $(dtbinst)=arch/mips/boot/dts
383
384archprepare:
385ifdef CONFIG_MIPS32_N32
386 @echo ' Checking missing-syscalls for N32'
387 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
388endif
389ifdef CONFIG_MIPS32_O32
390 @echo ' Checking missing-syscalls for O32'
391 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
392endif
393
394install:
395 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
396ifdef CONFIG_SYS_SUPPORTS_ZBOOT
397 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
398endif
399 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
400 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
401
402archclean:
403 $(Q)$(MAKE) $(clean)=arch/mips/boot
404 $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
405 $(Q)$(MAKE) $(clean)=arch/mips/boot/tools
406 $(Q)$(MAKE) $(clean)=arch/mips/lasat
407
408define archhelp
409 echo ' install - install kernel into $(INSTALL_PATH)'
410 echo ' vmlinux.ecoff - ECOFF boot image'
411 echo ' vmlinux.bin - Raw binary boot image'
412 echo ' vmlinux.srec - SREC boot image'
413 echo ' vmlinux.32 - 64-bit boot image wrapped in 32bits (IP22/IP32)'
414 echo ' vmlinuz - Compressed boot(zboot) image'
415 echo ' vmlinuz.ecoff - ECOFF zboot image'
416 echo ' vmlinuz.bin - Raw binary zboot image'
417 echo ' vmlinuz.srec - SREC zboot image'
418 echo ' uImage - U-Boot image'
419 echo ' uImage.bin - U-Boot image (uncompressed)'
420 echo ' uImage.bz2 - U-Boot image (bz2)'
421 echo ' uImage.gz - U-Boot image (gzip)'
422 echo ' uImage.lzma - U-Boot image (lzma)'
423 echo ' uImage.lzo - U-Boot image (lzo)'
424 echo ' dtbs - Device-tree blobs for enabled boards'
425 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'
426 echo
427 echo ' These will be default as appropriate for a configured platform.'
428endef