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 ifeq ($(call ld-ifversion, -ge, 22500, y),y)
69 # Have the linker provide sfpr if possible.
70 # There is a corresponding test in arch/powerpc/lib/Makefile
71 KBUILD_LDFLAGS_MODULE += --save-restore-funcs
73 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
77 ifdef CONFIG_CPU_LITTLE_ENDIAN
78 KBUILD_CFLAGS += -mlittle-endian
81 GNUTARGET := powerpcle
82 MULTIPLEWORD := -mno-multiple
83 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
85 KBUILD_CFLAGS += $(call cc-option,-mbig-endian)
89 MULTIPLEWORD := -mmultiple
93 ifndef CONFIG_CC_IS_CLANG
94 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
95 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc)
96 aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
97 aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2
101 ifndef CONFIG_CC_IS_CLANG
102 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
105 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
106 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
107 aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
108 aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
110 ifeq ($(HAS_BIARCH),y)
111 KBUILD_CFLAGS += -m$(BITS)
112 KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS)
113 KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION)
116 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls
118 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13
120 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2
123 LDFLAGS_vmlinux-y := -Bstatic
124 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
125 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) += -z notext
126 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
129 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
130 # -mcmodel=medium breaks modules because it uses 32bit offsets from
131 # the TOC pointer to create pointers where possible. Pointers into the
132 # percpu data area are created by this method.
134 # The kernel module loader relocates the percpu data section from the
135 # original location (starting with 0xd...) to somewhere in the base
136 # kernel percpu data space (starting with 0xc...). We need a full
137 # 64bit relocation for this to work, hence -mcmodel=large.
138 KBUILD_CFLAGS_MODULE += -mcmodel=large
140 export NO_MINIMAL_TOC := -mno-minimal-toc
144 CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
145 ifndef CONFIG_CC_IS_CLANG
146 ifdef CONFIG_CPU_LITTLE_ENDIAN
147 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
148 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
150 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
151 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
152 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
155 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
156 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
158 # Clang unconditionally reserves r2 on ppc32 and does not support the flag
159 # https://bugs.llvm.org/show_bug.cgi?id=39555
160 CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2)
162 # Clang doesn't support -mmultiple / -mno-multiple
163 # https://bugs.llvm.org/show_bug.cgi?id=39556
164 CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD))
166 CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
168 ifdef CONFIG_PPC_BOOK3S_64
169 ifdef CONFIG_CPU_LITTLE_ENDIAN
170 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
171 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
173 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
174 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
176 else ifdef CONFIG_PPC_BOOK3E_64
177 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
180 ifdef CONFIG_FUNCTION_TRACER
181 CC_FLAGS_FTRACE := -pg
182 ifdef CONFIG_MPROFILE_KERNEL
183 CC_FLAGS_FTRACE += -mprofile-kernel
187 CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
189 # Altivec option not allowed with e500mc64 in GCC.
191 E5500_CPU := -mcpu=powerpc64
193 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
195 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
196 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
199 ifdef CONFIG_PPC_E500MC
200 CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
202 CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
206 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
208 KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr)
209 KBUILD_AFLAGS += $(AFLAGS-y)
210 KBUILD_CFLAGS += $(call cc-option,-msoft-float)
211 KBUILD_CFLAGS += -pipe $(CFLAGS-y)
212 CPP = $(CC) -E $(KBUILD_CFLAGS)
214 CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
215 ifdef CONFIG_CPU_BIG_ENDIAN
216 CHECKFLAGS += -D__BIG_ENDIAN__
218 CHECKFLAGS += -D__LITTLE_ENDIAN__
221 ifdef CONFIG_476FPE_ERR46
222 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
223 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
226 # No AltiVec or VSX instructions when building kernel
227 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
228 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
230 # No SPE instruction when building kernel
231 # (We use all available options to help semi-broken compilers)
232 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
233 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
235 # Don't emit .eh_frame since we have no use for it
236 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
238 # Never use string load/store instructions as they are
239 # often slow when they are implemented at all
240 KBUILD_CFLAGS += $(call cc-option,-mno-string)
242 cpu-as-$(CONFIG_40x) += -Wa,-m405
243 cpu-as-$(CONFIG_44x) += -Wa,-m440
244 cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
245 cpu-as-$(CONFIG_E500) += -Wa,-me500
247 # When using '-many -mpower4' gas will first try and find a matching power4
248 # mnemonic and failing that it will allow any valid mnemonic that GAS knows
249 # about. GCC will pass -many to GAS when assembling, clang does not.
250 cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-many
251 cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc)
253 KBUILD_AFLAGS += $(cpu-as-y)
254 KBUILD_CFLAGS += $(cpu-as-y)
256 KBUILD_AFLAGS += $(aflags-y)
257 KBUILD_CFLAGS += $(cflags-y)
259 head-$(CONFIG_PPC64) := arch/powerpc/kernel/head_64.o
260 head-$(CONFIG_PPC_BOOK3S_32) := arch/powerpc/kernel/head_book3s_32.o
261 head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o
262 head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
263 head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
264 head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
266 head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
267 head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
268 head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
269 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
271 # Default to zImage, override when needed
274 # With make 3.82 we cannot mix normal and wildcard targets
275 BOOT_TARGETS1 := zImage zImage.initrd uImage
276 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
278 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
280 boot := arch/$(ARCH)/boot
282 $(BOOT_TARGETS1): vmlinux
283 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
284 $(BOOT_TARGETS2): vmlinux
285 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
288 PHONY += bootwrapper_install
290 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
292 # Used to create 'merged defconfigs'
293 # To use it $(call) it with the first argument as the base defconfig
294 # and the second argument as a space separated list of .config files to merge,
295 # without the .config suffix.
296 define merge_into_defconfig
297 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
298 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
299 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
300 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
303 PHONY += pseries_le_defconfig
304 pseries_le_defconfig:
305 $(call merge_into_defconfig,pseries_defconfig,le)
307 PHONY += ppc64le_defconfig
309 $(call merge_into_defconfig,ppc64_defconfig,le)
311 PHONY += ppc64le_guest_defconfig
312 ppc64le_guest_defconfig:
313 $(call merge_into_defconfig,ppc64_defconfig,le guest)
315 PHONY += ppc64_guest_defconfig
316 ppc64_guest_defconfig:
317 $(call merge_into_defconfig,ppc64_defconfig,be guest)
319 PHONY += powernv_be_defconfig
320 powernv_be_defconfig:
321 $(call merge_into_defconfig,powernv_defconfig,be)
323 PHONY += mpc85xx_defconfig
325 $(call merge_into_defconfig,mpc85xx_base.config,\
326 85xx-32bit 85xx-hw fsl-emb-nonhw)
328 PHONY += mpc85xx_smp_defconfig
329 mpc85xx_smp_defconfig:
330 $(call merge_into_defconfig,mpc85xx_base.config,\
331 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
333 PHONY += corenet32_smp_defconfig
334 corenet32_smp_defconfig:
335 $(call merge_into_defconfig,corenet_base.config,\
336 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
338 PHONY += corenet64_smp_defconfig
339 corenet64_smp_defconfig:
340 $(call merge_into_defconfig,corenet_base.config,\
341 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
343 PHONY += mpc86xx_defconfig
345 $(call merge_into_defconfig,mpc86xx_base.config,\
346 86xx-hw fsl-emb-nonhw)
348 PHONY += mpc86xx_smp_defconfig
349 mpc86xx_smp_defconfig:
350 $(call merge_into_defconfig,mpc86xx_base.config,\
351 86xx-smp 86xx-hw fsl-emb-nonhw)
353 PHONY += ppc32_allmodconfig
355 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
356 -f $(srctree)/Makefile allmodconfig
358 PHONY += ppc_defconfig
360 $(call merge_into_defconfig,book3s_32.config,)
362 PHONY += ppc64le_allmodconfig
363 ppc64le_allmodconfig:
364 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
365 -f $(srctree)/Makefile allmodconfig
367 PHONY += ppc64le_allnoconfig
369 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \
370 -f $(srctree)/Makefile allnoconfig
372 PHONY += ppc64_book3e_allmodconfig
373 ppc64_book3e_allmodconfig:
374 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
375 -f $(srctree)/Makefile allmodconfig
377 PHONY += ppc32_randconfig
379 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \
380 -f $(srctree)/Makefile randconfig
382 PHONY += ppc64_randconfig
384 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \
385 -f $(srctree)/Makefile randconfig
388 @echo '* zImage - Build default images selected by kernel config'
389 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
390 @echo ' uImage - U-Boot native image format'
391 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
392 @echo ' versions which do not support device trees'
393 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
394 @echo ' simpleImage.<dt> - Firmware independent image.'
395 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
396 @echo ' install - Install kernel using'
397 @echo ' (your) ~/bin/$(INSTALLKERNEL) or'
398 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
399 @echo ' install to $$(INSTALL_PATH) and run lilo'
400 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
402 @echo ' Targets with <dt> embed a device tree blob inside the image'
403 @echo ' These targets support board with firmware that does not'
404 @echo ' support passing a device tree directly. Replace <dt> with the'
405 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
406 @echo ' (minus the .dts extension).'
411 sh -x $(srctree)/$(boot)/install.sh "$(KERNELRELEASE)" vmlinux \
412 System.map "$(INSTALL_PATH)"
415 $(Q)$(MAKE) $(clean)=$(boot)
417 ifeq ($(KBUILD_EXTMOD),)
418 # We need to generate vdso-offsets.h before compiling certain files in kernel/.
419 # In order to do that, we should use the archprepare target, but we can't since
420 # asm-offsets.h is included in some files used to generate vdso-offsets.h, and
421 # asm-offsets.h is built in prepare0, for which archprepare is a dependency.
422 # Therefore we need to generate the header after prepare0 has been made, hence
424 prepare: vdso_prepare
425 vdso_prepare: prepare0
426 $(if $(CONFIG_VDSO32),$(Q)$(MAKE) \
427 $(build)=arch/powerpc/kernel/vdso32 include/generated/vdso32-offsets.h)
428 $(if $(CONFIG_PPC64),$(Q)$(MAKE) \
429 $(build)=arch/powerpc/kernel/vdso64 include/generated/vdso64-offsets.h)
432 archprepare: checkbin
435 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all
437 ifdef CONFIG_STACKPROTECTOR
438 prepare: stack_protector_prepare
440 PHONY += stack_protector_prepare
441 stack_protector_prepare: prepare0
443 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
445 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
451 prepare: task_cpu_prepare
453 PHONY += task_cpu_prepare
454 task_cpu_prepare: prepare0
455 $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h))
461 # Check toolchain versions:
462 # - gcc-4.6 is the minimum kernel-wide version so nothing required.
464 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
465 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
466 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
467 echo 'in some circumstances.' ; \
468 echo -n '*** Please use a different binutils version.' ; \