Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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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
15KBUILD_DEFCONFIG := ip22_defconfig
16
17#
18# Select the object file format to substitute into the linker script.
19#
20ifdef CONFIG_CPU_LITTLE_ENDIAN
2132bit-tool-archpref = mipsel
2264bit-tool-archpref = mips64el
2332bit-bfd = elf32-tradlittlemips
2464bit-bfd = elf64-tradlittlemips
2532bit-emul = elf32ltsmip
2664bit-emul = elf64ltsmip
27else
2832bit-tool-archpref = mips
2964bit-tool-archpref = mips64
3032bit-bfd = elf32-tradbigmips
3164bit-bfd = elf64-tradbigmips
3232bit-emul = elf32btsmip
3364bit-emul = elf64btsmip
34endif
35
36ifdef CONFIG_32BIT
37tool-archpref = $(32bit-tool-archpref)
38UTS_MACHINE := mips
39endif
40ifdef CONFIG_64BIT
41tool-archpref = $(64bit-tool-archpref)
42UTS_MACHINE := mips64
43endif
44
45ifneq ($(SUBARCH),$(ARCH))
46 ifeq ($(CROSS_COMPILE),)
47 CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-)
48 endif
49endif
50
51ifdef CONFIG_FUNCTION_GRAPH_TRACER
52 ifndef KBUILD_MCOUNT_RA_ADDRESS
53 ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
54 cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
55 endif
56 endif
57endif
58cflags-y += $(call cc-option, -mno-check-zero-division)
59
60ifdef CONFIG_32BIT
61ld-emul = $(32bit-emul)
62vmlinux-32 = vmlinux
63vmlinux-64 = vmlinux.64
64
65cflags-y += -mabi=32
66endif
67
68ifdef CONFIG_64BIT
69ld-emul = $(64bit-emul)
70vmlinux-32 = vmlinux.32
71vmlinux-64 = vmlinux
72
73cflags-y += -mabi=64
74endif
75
76all-$(CONFIG_BOOT_ELF32) := $(vmlinux-32)
77all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64)
78all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
79
80#
81# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
82# code since it only slows down the whole thing. At some point we might make
83# use of global pointer optimizations but their use of $28 conflicts with
84# the current pointer optimization.
85#
86# The DECStation requires an ECOFF kernel for remote booting, other MIPS
87# machines may also. Since BFD is incredibly buggy with respect to
88# crossformat linking we rely on the elf2ecoff tool for format conversion.
89#
90cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
91cflags-y += -msoft-float
92LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
93KBUILD_AFLAGS_MODULE += -mlong-calls
94KBUILD_CFLAGS_MODULE += -mlong-calls
95
96#
97# pass -msoft-float to GAS if it supports it. However on newer binutils
98# (specifically newer than 2.24.51.20140728) we then also need to explicitly
99# set ".set hardfloat" in all files which manipulate floating point registers.
100#
101ifneq ($(call as-option,-Wa$(comma)-msoft-float,),)
102 cflags-y += -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float
103endif
104
105cflags-y += -ffreestanding
106
107#
108# We explicitly add the endianness specifier if needed, this allows
109# to compile kernels with a toolchain for the other endianness. We
110# carefully avoid to add it redundantly because gcc 3.3/3.4 complains
111# when fed the toolchain default!
112#
113# Certain gcc versions up to gcc 4.1.1 (probably 4.2-subversion as of
114# 2006-10-10 don't properly change the predefined symbols if -EB / -EL
115# are used, so we kludge that here. A bug has been filed at
116# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.
117#
118undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
119undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
120predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
121predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
122cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be))
123cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le))
124
125cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
126 -fno-omit-frame-pointer
127#
128# CPU-dependent compiler/assembler options for optimization.
129#
130cflags-$(CONFIG_CPU_R3000) += -march=r3000
131cflags-$(CONFIG_CPU_TX39XX) += -march=r3900
132cflags-$(CONFIG_CPU_R6000) += -march=r6000 -Wa,--trap
133cflags-$(CONFIG_CPU_R4300) += -march=r4300 -Wa,--trap
134cflags-$(CONFIG_CPU_VR41XX) += -march=r4100 -Wa,--trap
135cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap
136cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap
137cflags-$(CONFIG_CPU_MIPS32_R1) += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
138 -Wa,-mips32 -Wa,--trap
139cflags-$(CONFIG_CPU_MIPS32_R2) += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
140 -Wa,-mips32r2 -Wa,--trap
141cflags-$(CONFIG_CPU_MIPS32_R6) += -march=mips32r6 -Wa,--trap
142cflags-$(CONFIG_CPU_MIPS64_R1) += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
143 -Wa,-mips64 -Wa,--trap
144cflags-$(CONFIG_CPU_MIPS64_R2) += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
145 -Wa,-mips64r2 -Wa,--trap
146cflags-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,--trap
147cflags-$(CONFIG_CPU_R5000) += -march=r5000 -Wa,--trap
148cflags-$(CONFIG_CPU_R5432) += $(call cc-option,-march=r5400,-march=r5000) \
149 -Wa,--trap
150cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=r5000) \
151 -Wa,--trap
152cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=r5000) \
153 -Wa,--trap
154cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=r5000) \
155 -Wa,--trap
156cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=r5000) \
157 -Wa,--trap
158cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mdmx)
159cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mips3d)
160cflags-$(CONFIG_CPU_R8000) += -march=r8000 -Wa,--trap
161cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=r8000) \
162 -Wa,--trap
163cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
164ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
165cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
166endif
167cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
168cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,-mips32 -Wa,--trap
169#
170# binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a
171# as MIPS64 R1; older versions as just R1. This leaves the possibility open
172# that GCC might generate R2 code for -march=loongson3a which then is rejected
173# by GAS. The cc-option can't probe for this behaviour so -march=loongson3a
174# can't easily be used safely within the kbuild framework.
175#
176cflags-$(CONFIG_CPU_LOONGSON3) += \
177 $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
178 -Wa,-mips64r2 -Wa,--trap
179
180cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,)
181cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,)
182cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)
183
184ifdef CONFIG_CPU_SB1
185ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
186KBUILD_AFLAGS_MODULE += -msb1-pass1-workarounds
187KBUILD_CFLAGS_MODULE += -msb1-pass1-workarounds
188endif
189endif
190
191# For smartmips configurations, there are hundreds of warnings due to ISA overrides
192# in assembly and header files. smartmips is only supported for MIPS32r1 onwards
193# and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
194# similar directives in the kernel will spam the build logs with the following warnings:
195# Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
196# or
197# Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
198# Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
199# been fixed properly.
200mips-cflags := $(cflags-y)
201ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
202smartmips-ase := $(call cc-option-yn,$(mips-cflags) -msmartmips)
203cflags-$(smartmips-ase) += -msmartmips -Wa,--no-warn
204endif
205ifeq ($(CONFIG_CPU_MICROMIPS),y)
206micromips-ase := $(call cc-option-yn,$(mips-cflags) -mmicromips)
207cflags-$(micromips-ase) += -mmicromips
208endif
209ifeq ($(CONFIG_CPU_HAS_MSA),y)
210toolchain-msa := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
211cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA
212endif
213
214#
215# Firmware support
216#
217libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc/
218libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/
219libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/
220libs-y += arch/mips/fw/lib/
221
222#
223# Kernel compression
224#
225ifdef SYS_SUPPORTS_ZBOOT
226COMPRESSION_FNAME = vmlinuz
227else
228COMPRESSION_FNAME = vmlinux
229endif
230
231#
232# Board-dependent options and extra files
233#
234include arch/mips/Kbuild.platforms
235
236ifdef CONFIG_PHYSICAL_START
237load-y = $(CONFIG_PHYSICAL_START)
238endif
239entry-y = 0x$(shell $(NM) vmlinux 2>/dev/null \
240 | grep "\bkernel_entry\b" | cut -f1 -d \ )
241
242cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic
243drivers-$(CONFIG_PCI) += arch/mips/pci/
244
245#
246# Automatically detect the build format. By default we choose
247# the elf format according to the load address.
248# We can always force a build with a 64-bits symbol format by
249# passing 'KBUILD_SYM32=no' option to the make's command line.
250#
251ifdef CONFIG_64BIT
252 ifndef KBUILD_SYM32
253 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
254 KBUILD_SYM32 = y
255 endif
256 endif
257
258 ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
259 cflags-y += -msym32 -DKBUILD_64BIT_SYM32
260 else
261 ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
262 $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
263 endif
264 endif
265endif
266
267KBUILD_AFLAGS += $(cflags-y)
268KBUILD_CFLAGS += $(cflags-y)
269KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
270KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
271
272bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \
273 VMLINUX_ENTRY_ADDRESS=$(entry-y)
274
275LDFLAGS += -m $(ld-emul)
276
277ifdef CONFIG_MIPS
278CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
279 egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
280 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
281ifdef CONFIG_64BIT
282CHECKFLAGS += -m64
283endif
284endif
285
286OBJCOPYFLAGS += --remove-section=.reginfo
287
288head-y := arch/mips/kernel/head.o
289
290libs-y += arch/mips/lib/
291libs-y += arch/mips/math-emu/
292
293# See arch/mips/Kbuild for content of core part of the kernel
294core-y += arch/mips/
295
296drivers-$(CONFIG_OPROFILE) += arch/mips/oprofile/
297
298# suspend and hibernation support
299drivers-$(CONFIG_PM) += arch/mips/power/
300
301# boot image targets (arch/mips/boot/)
302boot-y := vmlinux.bin
303boot-y += vmlinux.ecoff
304boot-y += vmlinux.srec
305ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
306boot-y += uImage
307boot-y += uImage.bin
308boot-y += uImage.bz2
309boot-y += uImage.gz
310boot-y += uImage.lzma
311boot-y += uImage.lzo
312endif
313
314# compressed boot image targets (arch/mips/boot/compressed/)
315bootz-y := vmlinuz
316bootz-y += vmlinuz.bin
317bootz-y += vmlinuz.ecoff
318bootz-y += vmlinuz.srec
319
320ifdef CONFIG_LASAT
321rom.bin rom.sw: vmlinux
322 $(Q)$(MAKE) $(build)=arch/mips/lasat/image \
323 $(bootvars-y) $@
324endif
325
326#
327# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
328# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
329# convert to ECOFF using elf2ecoff.
330#
331quiet_cmd_32 = OBJCOPY $@
332 cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
333vmlinux.32: vmlinux
334 $(call cmd,32)
335
336#
337# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
338# ELF files from 32-bit files by conversion.
339#
340quiet_cmd_64 = OBJCOPY $@
341 cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
342vmlinux.64: vmlinux
343 $(call cmd,64)
344
345all: $(all-y)
346
347# boot
348$(boot-y): $(vmlinux-32) FORCE
349 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
350 $(bootvars-y) arch/mips/boot/$@
351
352ifdef CONFIG_SYS_SUPPORTS_ZBOOT
353# boot/compressed
354$(bootz-y): $(vmlinux-32) FORCE
355 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
356 $(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
357else
358vmlinuz: FORCE
359 @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
360 /bin/false
361endif
362
363
364CLEAN_FILES += vmlinux.32 vmlinux.64
365
366# device-trees
367core-$(CONFIG_BUILTIN_DTB) += arch/mips/boot/dts/
368
369%.dtb %.dtb.S %.dtb.o: | scripts
370 $(Q)$(MAKE) $(build)=arch/mips/boot/dts arch/mips/boot/dts/$@
371
372PHONY += dtbs
373dtbs: scripts
374 $(Q)$(MAKE) $(build)=arch/mips/boot/dts
375
376PHONY += dtbs_install
377dtbs_install:
378 $(Q)$(MAKE) $(dtbinst)=arch/mips/boot/dts
379
380archprepare:
381ifdef CONFIG_MIPS32_N32
382 @echo ' Checking missing-syscalls for N32'
383 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
384endif
385ifdef CONFIG_MIPS32_O32
386 @echo ' Checking missing-syscalls for O32'
387 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
388endif
389
390install:
391 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
392ifdef CONFIG_SYS_SUPPORTS_ZBOOT
393 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
394endif
395 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
396 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
397
398archclean:
399 $(Q)$(MAKE) $(clean)=arch/mips/boot
400 $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
401 $(Q)$(MAKE) $(clean)=arch/mips/lasat
402
403define archhelp
404 echo ' install - install kernel into $(INSTALL_PATH)'
405 echo ' vmlinux.ecoff - ECOFF boot image'
406 echo ' vmlinux.bin - Raw binary boot image'
407 echo ' vmlinux.srec - SREC boot image'
408 echo ' vmlinux.32 - 64-bit boot image wrapped in 32bits (IP22/IP32)'
409 echo ' vmlinuz - Compressed boot(zboot) image'
410 echo ' vmlinuz.ecoff - ECOFF zboot image'
411 echo ' vmlinuz.bin - Raw binary zboot image'
412 echo ' vmlinuz.srec - SREC zboot image'
413 echo ' uImage - U-Boot image'
414 echo ' uImage.bin - U-Boot image (uncompressed)'
415 echo ' uImage.bz2 - U-Boot image (bz2)'
416 echo ' uImage.gz - U-Boot image (gzip)'
417 echo ' uImage.lzma - U-Boot image (lzma)'
418 echo ' uImage.lzo - U-Boot image (lzo)'
419 echo ' dtbs - Device-tree blobs for enabled boards'
420 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'
421 echo
422 echo ' These will be default as appropriate for a configured platform.'
423endef