1 # This file is included by the global makefile so that you can add your own
2 # architecture-specific flags and dependencies. Remember to do have actions
3 # for "archclean" and "archdep" for cleaning up and making dependencies for
6 # This file is subject to the terms and conditions of the GNU General Public
7 # License. See the file "COPYING" in the main directory of this archive
10 # Copyright (C) 1994 by Linus Torvalds
11 # Changes for PPC by Gary Thomas
12 # Rewritten by Cort Dougan and Paul Mackerras
15 HAS_BIARCH := $(call cc-option-yn, -m32)
17 # Set default 32 bits cross compilers for vdso and boot wrapper
20 ifeq ($(HAS_BIARCH),y)
21 ifeq ($(CROSS32_COMPILE),)
23 # These options will be overridden by any -mcpu option that the CPU
24 # or platform code sets later on the command line, but they are needed
25 # to set a sane 32-bit cpu target for the 64-bit cross compiler which
26 # may default to the wrong ISA.
27 KBUILD_CFLAGS += -mcpu=powerpc
28 KBUILD_AFLAGS += -mcpu=powerpc
33 ifdef CONFIG_PPC_BOOK3S_32
34 KBUILD_CFLAGS += -mcpu=powerpc
37 # If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use
38 # ppc64_defconfig because we have nothing better to go on.
39 uname := $(shell uname -m)
40 KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64)_defconfig
42 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
45 NM := $(NM) --synthetic
48 # BITS is used as extension for files which are available in a 32 bit
49 # and a 64 bit version to simplify shared Makefiles.
50 # e.g.: obj-y += foo_$(BITS).o
60 machine-$(CONFIG_PPC64) += 64
61 machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
62 UTS_MACHINE := $(subst $(space),,$(machine-y))
64 # XXX This needs to be before we override LD below
66 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
68 KBUILD_LDS_MODULE += $(srctree)/arch/powerpc/kernel/module.lds
69 ifeq ($(call ld-ifversion, -ge, 225000000, y),y)
70 # Have the linker provide sfpr if possible.
71 # There is a corresponding test in arch/powerpc/lib/Makefile
72 KBUILD_LDFLAGS_MODULE += --save-restore-funcs
74 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
78 ifdef CONFIG_CPU_LITTLE_ENDIAN
79 KBUILD_CFLAGS += -mlittle-endian
82 GNUTARGET := powerpcle
83 MULTIPLEWORD := -mno-multiple
84 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
86 KBUILD_CFLAGS += $(call cc-option,-mbig-endian)
90 MULTIPLEWORD := -mmultiple
94 ifndef CONFIG_CC_IS_CLANG
95 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
96 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc)
97 aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
98 aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2
102 ifndef CONFIG_CC_IS_CLANG
103 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
106 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
107 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
108 aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
109 aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
111 ifeq ($(HAS_BIARCH),y)
112 KBUILD_CFLAGS += -m$(BITS)
113 KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS)
114 KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION)
117 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls
119 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13
121 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2
124 LDFLAGS_vmlinux-y := -Bstatic
125 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
126 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
127 LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn)
130 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
131 # -mcmodel=medium breaks modules because it uses 32bit offsets from
132 # the TOC pointer to create pointers where possible. Pointers into the
133 # percpu data area are created by this method.
135 # The kernel module loader relocates the percpu data section from the
136 # original location (starting with 0xd...) to somewhere in the base
137 # kernel percpu data space (starting with 0xc...). We need a full
138 # 64bit relocation for this to work, hence -mcmodel=large.
139 KBUILD_CFLAGS_MODULE += -mcmodel=large
141 export NO_MINIMAL_TOC := -mno-minimal-toc
145 CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
146 ifndef CONFIG_CC_IS_CLANG
147 ifdef CONFIG_CPU_LITTLE_ENDIAN
148 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
149 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
151 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
152 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
153 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
156 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
157 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
159 # Clang unconditionally reserves r2 on ppc32 and does not support the flag
160 # https://bugs.llvm.org/show_bug.cgi?id=39555
161 CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2)
163 # Clang doesn't support -mmultiple / -mno-multiple
164 # https://bugs.llvm.org/show_bug.cgi?id=39556
165 CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD))
167 CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
169 ifdef CONFIG_PPC_BOOK3S_64
170 ifdef CONFIG_CPU_LITTLE_ENDIAN
171 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
172 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
174 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
175 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
178 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
181 ifdef CONFIG_FUNCTION_TRACER
182 CC_FLAGS_FTRACE := -pg
183 ifdef CONFIG_MPROFILE_KERNEL
184 CC_FLAGS_FTRACE += -mprofile-kernel
186 # Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8
187 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199
188 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828
189 ifndef CONFIG_CC_IS_CLANG
190 CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog)
194 CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
196 # Altivec option not allowed with e500mc64 in GCC.
198 E5500_CPU := -mcpu=powerpc64
200 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
202 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
203 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
206 ifdef CONFIG_PPC_E500MC
207 CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
209 CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
213 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
215 KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr)
216 KBUILD_AFLAGS += $(AFLAGS-y)
217 KBUILD_CFLAGS += $(call cc-option,-msoft-float)
218 KBUILD_CFLAGS += -pipe $(CFLAGS-y)
219 CPP = $(CC) -E $(KBUILD_CFLAGS)
221 CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
222 ifdef CONFIG_CPU_BIG_ENDIAN
223 CHECKFLAGS += -D__BIG_ENDIAN__
225 CHECKFLAGS += -D__LITTLE_ENDIAN__
228 ifdef CONFIG_476FPE_ERR46
229 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
230 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
233 # No AltiVec or VSX instructions when building kernel
234 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
235 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
237 # No SPE instruction when building kernel
238 # (We use all available options to help semi-broken compilers)
239 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
240 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
242 # Don't emit .eh_frame since we have no use for it
243 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
245 # Never use string load/store instructions as they are
246 # often slow when they are implemented at all
247 KBUILD_CFLAGS += $(call cc-option,-mno-string)
249 cpu-as-$(CONFIG_40x) += -Wa,-m405
250 cpu-as-$(CONFIG_44x) += -Wa,-m440
251 cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
252 cpu-as-$(CONFIG_E200) += -Wa,-me200
253 cpu-as-$(CONFIG_E500) += -Wa,-me500
255 # When using '-many -mpower4' gas will first try and find a matching power4
256 # mnemonic and failing that it will allow any valid mnemonic that GAS knows
257 # about. GCC will pass -many to GAS when assembling, clang does not.
258 cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-many
259 cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc)
261 KBUILD_AFLAGS += $(cpu-as-y)
262 KBUILD_CFLAGS += $(cpu-as-y)
264 KBUILD_AFLAGS += $(aflags-y)
265 KBUILD_CFLAGS += $(cflags-y)
267 head-$(CONFIG_PPC64) := arch/powerpc/kernel/head_64.o
268 head-$(CONFIG_PPC_BOOK3S_32) := arch/powerpc/kernel/head_book3s_32.o
269 head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o
270 head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
271 head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
272 head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
274 head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
275 head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
276 head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
277 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
279 # See arch/powerpc/Kbuild for content of core part of the kernel
280 core-y += arch/powerpc/
282 drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
284 # Default to zImage, override when needed
287 # With make 3.82 we cannot mix normal and wildcard targets
288 BOOT_TARGETS1 := zImage zImage.initrd uImage
289 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
291 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
293 boot := arch/$(ARCH)/boot
295 $(BOOT_TARGETS1): vmlinux
296 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
297 $(BOOT_TARGETS2): vmlinux
298 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
301 PHONY += bootwrapper_install
303 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
305 # Used to create 'merged defconfigs'
306 # To use it $(call) it with the first argument as the base defconfig
307 # and the second argument as a space separated list of .config files to merge,
308 # without the .config suffix.
309 define merge_into_defconfig
310 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
311 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
312 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
313 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
316 PHONY += pseries_le_defconfig
317 pseries_le_defconfig:
318 $(call merge_into_defconfig,pseries_defconfig,le)
320 PHONY += ppc64le_defconfig
322 $(call merge_into_defconfig,ppc64_defconfig,le)
324 PHONY += ppc64le_guest_defconfig
325 ppc64le_guest_defconfig:
326 $(call merge_into_defconfig,ppc64_defconfig,le guest)
328 PHONY += ppc64_guest_defconfig
329 ppc64_guest_defconfig:
330 $(call merge_into_defconfig,ppc64_defconfig,be guest)
332 PHONY += powernv_be_defconfig
333 powernv_be_defconfig:
334 $(call merge_into_defconfig,powernv_defconfig,be)
336 PHONY += mpc85xx_defconfig
338 $(call merge_into_defconfig,mpc85xx_base.config,\
339 85xx-32bit 85xx-hw fsl-emb-nonhw)
341 PHONY += mpc85xx_smp_defconfig
342 mpc85xx_smp_defconfig:
343 $(call merge_into_defconfig,mpc85xx_base.config,\
344 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
346 PHONY += corenet32_smp_defconfig
347 corenet32_smp_defconfig:
348 $(call merge_into_defconfig,corenet_base.config,\
349 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
351 PHONY += corenet64_smp_defconfig
352 corenet64_smp_defconfig:
353 $(call merge_into_defconfig,corenet_base.config,\
354 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
356 PHONY += mpc86xx_defconfig
358 $(call merge_into_defconfig,mpc86xx_base.config,\
359 86xx-hw fsl-emb-nonhw)
361 PHONY += mpc86xx_smp_defconfig
362 mpc86xx_smp_defconfig:
363 $(call merge_into_defconfig,mpc86xx_base.config,\
364 86xx-smp 86xx-hw fsl-emb-nonhw)
366 PHONY += ppc32_allmodconfig
368 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
369 -f $(srctree)/Makefile allmodconfig
371 PHONY += ppc_defconfig
373 $(call merge_into_defconfig,book3s_32.config,)
375 PHONY += ppc64le_allmodconfig
376 ppc64le_allmodconfig:
377 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
378 -f $(srctree)/Makefile allmodconfig
380 PHONY += ppc64_book3e_allmodconfig
381 ppc64_book3e_allmodconfig:
382 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
383 -f $(srctree)/Makefile allmodconfig
386 @echo '* zImage - Build default images selected by kernel config'
387 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
388 @echo ' uImage - U-Boot native image format'
389 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
390 @echo ' versions which do not support device trees'
391 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
392 @echo ' simpleImage.<dt> - Firmware independent image.'
393 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
394 @echo ' install - Install kernel using'
395 @echo ' (your) ~/bin/$(INSTALLKERNEL) or'
396 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
397 @echo ' install to $$(INSTALL_PATH) and run lilo'
398 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
400 @echo ' Targets with <dt> embed a device tree blob inside the image'
401 @echo ' These targets support board with firmware that does not'
402 @echo ' support passing a device tree directly. Replace <dt> with the'
403 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
404 @echo ' (minus the .dts extension).'
409 $(Q)$(MAKE) $(build)=$(boot) install
411 PHONY += vdso_install
414 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
417 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
421 $(Q)$(MAKE) $(clean)=$(boot)
423 archprepare: checkbin
426 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all
428 ifdef CONFIG_STACKPROTECTOR
429 prepare: stack_protector_prepare
431 PHONY += stack_protector_prepare
432 stack_protector_prepare: prepare0
434 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
436 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
441 prepare: task_cpu_prepare
443 PHONY += task_cpu_prepare
444 task_cpu_prepare: prepare0
445 $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h))
449 # Check toolchain versions:
450 # - gcc-4.6 is the minimum kernel-wide version so nothing required.
452 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
453 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
454 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
455 echo 'in some circumstances.' ; \
456 echo -n '*** Please use a different binutils version.' ; \