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 := $(LDFLAGS_vmlinux-y)
128 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
129 # -mcmodel=medium breaks modules because it uses 32bit offsets from
130 # the TOC pointer to create pointers where possible. Pointers into the
131 # percpu data area are created by this method.
133 # The kernel module loader relocates the percpu data section from the
134 # original location (starting with 0xd...) to somewhere in the base
135 # kernel percpu data space (starting with 0xc...). We need a full
136 # 64bit relocation for this to work, hence -mcmodel=large.
137 KBUILD_CFLAGS_MODULE += -mcmodel=large
139 export NO_MINIMAL_TOC := -mno-minimal-toc
143 CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
144 ifndef CONFIG_CC_IS_CLANG
145 ifdef CONFIG_CPU_LITTLE_ENDIAN
146 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
147 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
149 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
150 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
151 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
154 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
155 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
157 # Clang unconditionally reserves r2 on ppc32 and does not support the flag
158 # https://bugs.llvm.org/show_bug.cgi?id=39555
159 CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2)
161 # Clang doesn't support -mmultiple / -mno-multiple
162 # https://bugs.llvm.org/show_bug.cgi?id=39556
163 CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD))
165 CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
167 ifdef CONFIG_PPC_BOOK3S_64
168 ifdef CONFIG_CPU_LITTLE_ENDIAN
169 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
170 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
172 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
173 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
176 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
179 ifdef CONFIG_FUNCTION_TRACER
180 CC_FLAGS_FTRACE := -pg
181 ifdef CONFIG_MPROFILE_KERNEL
182 CC_FLAGS_FTRACE += -mprofile-kernel
186 CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
188 # Altivec option not allowed with e500mc64 in GCC.
190 E5500_CPU := -mcpu=powerpc64
192 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
194 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
195 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
198 ifdef CONFIG_PPC_E500MC
199 CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
201 CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
205 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
207 KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr)
208 KBUILD_AFLAGS += $(AFLAGS-y)
209 KBUILD_CFLAGS += $(call cc-option,-msoft-float)
210 KBUILD_CFLAGS += -pipe $(CFLAGS-y)
211 CPP = $(CC) -E $(KBUILD_CFLAGS)
213 CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
214 ifdef CONFIG_CPU_BIG_ENDIAN
215 CHECKFLAGS += -D__BIG_ENDIAN__
217 CHECKFLAGS += -D__LITTLE_ENDIAN__
220 ifdef CONFIG_476FPE_ERR46
221 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
222 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
225 # No AltiVec or VSX instructions when building kernel
226 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
227 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
229 # No SPE instruction when building kernel
230 # (We use all available options to help semi-broken compilers)
231 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
232 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
234 # Don't emit .eh_frame since we have no use for it
235 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
237 # Never use string load/store instructions as they are
238 # often slow when they are implemented at all
239 KBUILD_CFLAGS += $(call cc-option,-mno-string)
241 cpu-as-$(CONFIG_40x) += -Wa,-m405
242 cpu-as-$(CONFIG_44x) += -Wa,-m440
243 cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
244 cpu-as-$(CONFIG_E500) += -Wa,-me500
246 # When using '-many -mpower4' gas will first try and find a matching power4
247 # mnemonic and failing that it will allow any valid mnemonic that GAS knows
248 # about. GCC will pass -many to GAS when assembling, clang does not.
249 cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-many
250 cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc)
252 KBUILD_AFLAGS += $(cpu-as-y)
253 KBUILD_CFLAGS += $(cpu-as-y)
255 KBUILD_AFLAGS += $(aflags-y)
256 KBUILD_CFLAGS += $(cflags-y)
258 head-$(CONFIG_PPC64) := arch/powerpc/kernel/head_64.o
259 head-$(CONFIG_PPC_BOOK3S_32) := arch/powerpc/kernel/head_book3s_32.o
260 head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o
261 head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
262 head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
263 head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
265 head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
266 head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
267 head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
268 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
270 # See arch/powerpc/Kbuild for content of core part of the kernel
271 core-y += arch/powerpc/
273 # Default to zImage, override when needed
276 # With make 3.82 we cannot mix normal and wildcard targets
277 BOOT_TARGETS1 := zImage zImage.initrd uImage
278 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
280 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
282 boot := arch/$(ARCH)/boot
284 $(BOOT_TARGETS1): vmlinux
285 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
286 $(BOOT_TARGETS2): vmlinux
287 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
290 PHONY += bootwrapper_install
292 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
294 # Used to create 'merged defconfigs'
295 # To use it $(call) it with the first argument as the base defconfig
296 # and the second argument as a space separated list of .config files to merge,
297 # without the .config suffix.
298 define merge_into_defconfig
299 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
300 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
301 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
302 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
305 PHONY += pseries_le_defconfig
306 pseries_le_defconfig:
307 $(call merge_into_defconfig,pseries_defconfig,le)
309 PHONY += ppc64le_defconfig
311 $(call merge_into_defconfig,ppc64_defconfig,le)
313 PHONY += ppc64le_guest_defconfig
314 ppc64le_guest_defconfig:
315 $(call merge_into_defconfig,ppc64_defconfig,le guest)
317 PHONY += ppc64_guest_defconfig
318 ppc64_guest_defconfig:
319 $(call merge_into_defconfig,ppc64_defconfig,be guest)
321 PHONY += powernv_be_defconfig
322 powernv_be_defconfig:
323 $(call merge_into_defconfig,powernv_defconfig,be)
325 PHONY += mpc85xx_defconfig
327 $(call merge_into_defconfig,mpc85xx_base.config,\
328 85xx-32bit 85xx-hw fsl-emb-nonhw)
330 PHONY += mpc85xx_smp_defconfig
331 mpc85xx_smp_defconfig:
332 $(call merge_into_defconfig,mpc85xx_base.config,\
333 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
335 PHONY += corenet32_smp_defconfig
336 corenet32_smp_defconfig:
337 $(call merge_into_defconfig,corenet_base.config,\
338 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
340 PHONY += corenet64_smp_defconfig
341 corenet64_smp_defconfig:
342 $(call merge_into_defconfig,corenet_base.config,\
343 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
345 PHONY += mpc86xx_defconfig
347 $(call merge_into_defconfig,mpc86xx_base.config,\
348 86xx-hw fsl-emb-nonhw)
350 PHONY += mpc86xx_smp_defconfig
351 mpc86xx_smp_defconfig:
352 $(call merge_into_defconfig,mpc86xx_base.config,\
353 86xx-smp 86xx-hw fsl-emb-nonhw)
355 PHONY += ppc32_allmodconfig
357 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
358 -f $(srctree)/Makefile allmodconfig
360 PHONY += ppc_defconfig
362 $(call merge_into_defconfig,book3s_32.config,)
364 PHONY += ppc64le_allmodconfig
365 ppc64le_allmodconfig:
366 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
367 -f $(srctree)/Makefile allmodconfig
369 PHONY += ppc64le_allnoconfig
371 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \
372 -f $(srctree)/Makefile allnoconfig
374 PHONY += ppc64_book3e_allmodconfig
375 ppc64_book3e_allmodconfig:
376 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
377 -f $(srctree)/Makefile allmodconfig
379 PHONY += ppc32_randconfig
381 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \
382 -f $(srctree)/Makefile randconfig
384 PHONY += ppc64_randconfig
386 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \
387 -f $(srctree)/Makefile randconfig
390 @echo '* zImage - Build default images selected by kernel config'
391 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
392 @echo ' uImage - U-Boot native image format'
393 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
394 @echo ' versions which do not support device trees'
395 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
396 @echo ' simpleImage.<dt> - Firmware independent image.'
397 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
398 @echo ' install - Install kernel using'
399 @echo ' (your) ~/bin/$(INSTALLKERNEL) or'
400 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
401 @echo ' install to $$(INSTALL_PATH) and run lilo'
402 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
404 @echo ' Targets with <dt> embed a device tree blob inside the image'
405 @echo ' These targets support board with firmware that does not'
406 @echo ' support passing a device tree directly. Replace <dt> with the'
407 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
408 @echo ' (minus the .dts extension).'
413 $(Q)$(MAKE) $(build)=$(boot) install
416 $(Q)$(MAKE) $(clean)=$(boot)
418 ifeq ($(KBUILD_EXTMOD),)
419 # We need to generate vdso-offsets.h before compiling certain files in kernel/.
420 # In order to do that, we should use the archprepare target, but we can't since
421 # asm-offsets.h is included in some files used to generate vdso-offsets.h, and
422 # asm-offsets.h is built in prepare0, for which archprepare is a dependency.
423 # Therefore we need to generate the header after prepare0 has been made, hence
425 prepare: vdso_prepare
426 vdso_prepare: prepare0
427 $(if $(CONFIG_VDSO32),$(Q)$(MAKE) \
428 $(build)=arch/powerpc/kernel/vdso32 include/generated/vdso32-offsets.h)
429 $(if $(CONFIG_PPC64),$(Q)$(MAKE) \
430 $(build)=arch/powerpc/kernel/vdso64 include/generated/vdso64-offsets.h)
433 archprepare: checkbin
436 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all
438 ifdef CONFIG_STACKPROTECTOR
439 prepare: stack_protector_prepare
441 PHONY += stack_protector_prepare
442 stack_protector_prepare: prepare0
444 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
446 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
452 prepare: task_cpu_prepare
454 PHONY += task_cpu_prepare
455 task_cpu_prepare: prepare0
456 $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h))
462 # Check toolchain versions:
463 # - gcc-4.6 is the minimum kernel-wide version so nothing required.
465 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
466 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
467 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
468 echo 'in some circumstances.' ; \
469 echo -n '*** Please use a different binutils version.' ; \