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 # If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use
21 # ppc64_defconfig because we have nothing better to go on.
22 uname := $(shell uname -m)
23 KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64)_defconfig
25 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
28 NM := $(NM) --synthetic
31 # BITS is used as extension for files which are available in a 32 bit
32 # and a 64 bit version to simplify shared Makefiles.
33 # e.g.: obj-y += foo_$(BITS).o
43 machine-$(CONFIG_PPC64) += 64
44 machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
45 UTS_MACHINE := $(subst $(space),,$(machine-y))
47 # XXX This needs to be before we override LD below
49 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
51 ifeq ($(call ld-ifversion, -ge, 22500, y),y)
52 # Have the linker provide sfpr if possible.
53 # There is a corresponding test in arch/powerpc/lib/Makefile
54 KBUILD_LDFLAGS_MODULE += --save-restore-funcs
56 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
60 ifdef CONFIG_CPU_LITTLE_ENDIAN
61 KBUILD_CFLAGS += -mlittle-endian
64 GNUTARGET := powerpcle
65 MULTIPLEWORD := -mno-multiple
66 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
68 KBUILD_CFLAGS += $(call cc-option,-mbig-endian)
72 MULTIPLEWORD := -mmultiple
76 ifndef CONFIG_CC_IS_CLANG
77 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
78 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc)
79 aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
80 aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2
84 ifndef CONFIG_CC_IS_CLANG
85 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
88 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
89 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
90 aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
91 aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
93 ifeq ($(HAS_BIARCH),y)
94 KBUILD_CFLAGS += -m$(BITS)
95 KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS)
96 KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION)
99 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls
101 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13
103 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2
106 LDFLAGS_vmlinux-y := -Bstatic
107 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
108 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) += -z notext
109 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
112 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
113 # -mcmodel=medium breaks modules because it uses 32bit offsets from
114 # the TOC pointer to create pointers where possible. Pointers into the
115 # percpu data area are created by this method.
117 # The kernel module loader relocates the percpu data section from the
118 # original location (starting with 0xd...) to somewhere in the base
119 # kernel percpu data space (starting with 0xc...). We need a full
120 # 64bit relocation for this to work, hence -mcmodel=large.
121 KBUILD_CFLAGS_MODULE += -mcmodel=large
123 export NO_MINIMAL_TOC := -mno-minimal-toc
127 CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
128 ifndef CONFIG_CC_IS_CLANG
129 ifdef CONFIG_CPU_LITTLE_ENDIAN
130 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
131 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
133 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
134 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
135 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
138 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
139 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
141 # Clang unconditionally reserves r2 on ppc32 and does not support the flag
142 # https://bugs.llvm.org/show_bug.cgi?id=39555
143 CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2)
145 # Clang doesn't support -mmultiple / -mno-multiple
146 # https://bugs.llvm.org/show_bug.cgi?id=39556
147 CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD))
149 CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
151 ifdef CONFIG_PPC_BOOK3S_64
152 ifdef CONFIG_CPU_LITTLE_ENDIAN
153 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
154 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
156 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
157 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
159 else ifdef CONFIG_PPC_BOOK3E_64
160 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
163 ifdef CONFIG_FUNCTION_TRACER
164 CC_FLAGS_FTRACE := -pg
165 ifdef CONFIG_MPROFILE_KERNEL
166 CC_FLAGS_FTRACE += -mprofile-kernel
170 CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
171 AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
173 # Altivec option not allowed with e500mc64 in GCC.
175 E5500_CPU := -mcpu=powerpc64
177 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
179 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
180 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
182 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
184 KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr)
185 KBUILD_AFLAGS += $(AFLAGS-y)
186 KBUILD_CFLAGS += $(call cc-option,-msoft-float)
187 KBUILD_CFLAGS += -pipe $(CFLAGS-y)
188 CPP = $(CC) -E $(KBUILD_CFLAGS)
190 CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
191 ifdef CONFIG_CPU_BIG_ENDIAN
192 CHECKFLAGS += -D__BIG_ENDIAN__
194 CHECKFLAGS += -D__LITTLE_ENDIAN__
197 ifdef CONFIG_476FPE_ERR46
198 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
199 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
202 # No AltiVec or VSX instructions when building kernel
203 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
204 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
206 # No SPE instruction when building kernel
207 # (We use all available options to help semi-broken compilers)
208 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
209 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
211 # Don't emit .eh_frame since we have no use for it
212 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
214 # Never use string load/store instructions as they are
215 # often slow when they are implemented at all
216 KBUILD_CFLAGS += $(call cc-option,-mno-string)
218 cpu-as-$(CONFIG_40x) += -Wa,-m405
219 cpu-as-$(CONFIG_44x) += -Wa,-m440
220 cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
221 cpu-as-$(CONFIG_E500) += -Wa,-me500
223 # When using '-many -mpower4' gas will first try and find a matching power4
224 # mnemonic and failing that it will allow any valid mnemonic that GAS knows
225 # about. GCC will pass -many to GAS when assembling, clang does not.
226 cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-many
227 cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc)
229 KBUILD_AFLAGS += $(cpu-as-y)
230 KBUILD_CFLAGS += $(cpu-as-y)
232 KBUILD_AFLAGS += $(aflags-y)
233 KBUILD_CFLAGS += $(cflags-y)
235 head-$(CONFIG_PPC64) := arch/powerpc/kernel/head_64.o
236 head-$(CONFIG_PPC_BOOK3S_32) := arch/powerpc/kernel/head_book3s_32.o
237 head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o
238 head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
239 head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
240 head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
242 head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
243 head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
244 head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
245 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
247 # Default to zImage, override when needed
250 # With make 3.82 we cannot mix normal and wildcard targets
251 BOOT_TARGETS1 := zImage zImage.initrd uImage
252 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
254 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
256 boot := arch/$(ARCH)/boot
258 $(BOOT_TARGETS1): vmlinux
259 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
260 $(BOOT_TARGETS2): vmlinux
261 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
264 PHONY += bootwrapper_install
266 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
268 # Used to create 'merged defconfigs'
269 # To use it $(call) it with the first argument as the base defconfig
270 # and the second argument as a space separated list of .config files to merge,
271 # without the .config suffix.
272 define merge_into_defconfig
273 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
274 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
275 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
276 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
279 PHONY += pseries_le_defconfig
280 pseries_le_defconfig:
281 $(call merge_into_defconfig,pseries_defconfig,le)
283 PHONY += ppc64le_defconfig
285 $(call merge_into_defconfig,ppc64_defconfig,le)
287 PHONY += ppc64le_guest_defconfig
288 ppc64le_guest_defconfig:
289 $(call merge_into_defconfig,ppc64_defconfig,le guest)
291 PHONY += ppc64_guest_defconfig
292 ppc64_guest_defconfig:
293 $(call merge_into_defconfig,ppc64_defconfig,be guest)
295 PHONY += powernv_be_defconfig
296 powernv_be_defconfig:
297 $(call merge_into_defconfig,powernv_defconfig,be)
299 PHONY += mpc85xx_defconfig
301 $(call merge_into_defconfig,mpc85xx_base.config,\
302 85xx-32bit 85xx-hw fsl-emb-nonhw)
304 PHONY += mpc85xx_smp_defconfig
305 mpc85xx_smp_defconfig:
306 $(call merge_into_defconfig,mpc85xx_base.config,\
307 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
309 PHONY += corenet32_smp_defconfig
310 corenet32_smp_defconfig:
311 $(call merge_into_defconfig,corenet_base.config,\
312 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
314 PHONY += corenet64_smp_defconfig
315 corenet64_smp_defconfig:
316 $(call merge_into_defconfig,corenet_base.config,\
317 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
319 PHONY += mpc86xx_defconfig
321 $(call merge_into_defconfig,mpc86xx_base.config,\
322 86xx-hw fsl-emb-nonhw)
324 PHONY += mpc86xx_smp_defconfig
325 mpc86xx_smp_defconfig:
326 $(call merge_into_defconfig,mpc86xx_base.config,\
327 86xx-smp 86xx-hw fsl-emb-nonhw)
329 PHONY += ppc32_allmodconfig
331 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
332 -f $(srctree)/Makefile allmodconfig
334 PHONY += ppc_defconfig
336 $(call merge_into_defconfig,book3s_32.config,)
338 PHONY += ppc64le_allmodconfig
339 ppc64le_allmodconfig:
340 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
341 -f $(srctree)/Makefile allmodconfig
343 PHONY += ppc64le_allnoconfig
345 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \
346 -f $(srctree)/Makefile allnoconfig
348 PHONY += ppc64_book3e_allmodconfig
349 ppc64_book3e_allmodconfig:
350 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
351 -f $(srctree)/Makefile allmodconfig
353 PHONY += ppc32_randconfig
355 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \
356 -f $(srctree)/Makefile randconfig
358 PHONY += ppc64_randconfig
360 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \
361 -f $(srctree)/Makefile randconfig
364 @echo '* zImage - Build default images selected by kernel config'
365 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
366 @echo ' uImage - U-Boot native image format'
367 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
368 @echo ' versions which do not support device trees'
369 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
370 @echo ' simpleImage.<dt> - Firmware independent image.'
371 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
372 @echo ' install - Install kernel using'
373 @echo ' (your) ~/bin/$(INSTALLKERNEL) or'
374 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
375 @echo ' install to $$(INSTALL_PATH) and run lilo'
376 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
378 @echo ' Targets with <dt> embed a device tree blob inside the image'
379 @echo ' These targets support board with firmware that does not'
380 @echo ' support passing a device tree directly. Replace <dt> with the'
381 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
382 @echo ' (minus the .dts extension).'
387 sh -x $(srctree)/$(boot)/install.sh "$(KERNELRELEASE)" vmlinux \
388 System.map "$(INSTALL_PATH)"
391 $(Q)$(MAKE) $(clean)=$(boot)
393 ifeq ($(KBUILD_EXTMOD),)
394 # We need to generate vdso-offsets.h before compiling certain files in kernel/.
395 # In order to do that, we should use the archprepare target, but we can't since
396 # asm-offsets.h is included in some files used to generate vdso-offsets.h, and
397 # asm-offsets.h is built in prepare0, for which archprepare is a dependency.
398 # Therefore we need to generate the header after prepare0 has been made, hence
400 prepare: vdso_prepare
401 vdso_prepare: prepare0
402 $(if $(CONFIG_VDSO32),$(Q)$(MAKE) \
403 $(build)=arch/powerpc/kernel/vdso32 include/generated/vdso32-offsets.h)
404 $(if $(CONFIG_PPC64),$(Q)$(MAKE) \
405 $(build)=arch/powerpc/kernel/vdso64 include/generated/vdso64-offsets.h)
408 archprepare: checkbin
411 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all
413 ifdef CONFIG_STACKPROTECTOR
414 prepare: stack_protector_prepare
416 PHONY += stack_protector_prepare
417 stack_protector_prepare: prepare0
419 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
421 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
427 prepare: task_cpu_prepare
429 PHONY += task_cpu_prepare
430 task_cpu_prepare: prepare0
431 $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h))
437 # Check toolchain versions:
438 # - gcc-4.6 is the minimum kernel-wide version so nothing required.
440 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
441 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
442 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
443 echo 'in some circumstances.' ; \
444 echo -n '*** Please use a different binutils version.' ; \