1 # This file is included by the global makefile so that you can add your own
2 # architecture-specific flags and dependencies.
4 # This file is subject to the terms and conditions of the GNU General Public
5 # License. See the file "COPYING" in the main directory of this archive
8 # Copyright (C) 1994 by Linus Torvalds
9 # Changes for PPC by Gary Thomas
10 # Rewritten by Cort Dougan and Paul Mackerras
14 ifeq ($(CROSS_COMPILE),)
15 # Auto detect cross compiler prefix.
16 # Look for: (powerpc(64(le)?)?)(-unknown)?-linux(-gnu)?-
17 CC_ARCHES := powerpc powerpc64 powerpc64le
18 CC_SUFFIXES := linux linux-gnu unknown-linux-gnu
19 CROSS_COMPILE := $(call cc-cross-prefix, $(foreach a,$(CC_ARCHES), \
20 $(foreach s,$(CC_SUFFIXES),$(a)-$(s)-)))
24 HAS_BIARCH := $(call cc-option-yn, -m32)
26 # Set default 32 bits cross compilers for vdso and boot wrapper
29 # If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use
30 # ppc64le_defconfig because we have nothing better to go on.
31 uname := $(shell uname -m)
32 KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64le)_defconfig
34 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
37 NM := $(NM) --synthetic
40 # BITS is used as extension for files which are available in a 32 bit
41 # and a 64 bit version to simplify shared Makefiles.
42 # e.g.: obj-y += foo_$(BITS).o
52 machine-$(CONFIG_PPC64) += 64
53 machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
54 UTS_MACHINE := $(subst $(space),,$(machine-y))
56 ifeq ($(CONFIG_PPC64)$(CONFIG_LD_IS_BFD),yy)
57 # Have the linker provide sfpr if possible.
58 # There is a corresponding test in arch/powerpc/lib/Makefile
59 KBUILD_LDFLAGS_MODULE += --save-restore-funcs
61 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
64 ifdef CONFIG_CPU_LITTLE_ENDIAN
65 KBUILD_CFLAGS += -mlittle-endian
68 GNUTARGET := powerpcle
69 MULTIPLEWORD := -mno-multiple
70 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
72 KBUILD_CFLAGS += $(call cc-option,-mbig-endian)
76 MULTIPLEWORD := -mmultiple
80 ifndef CONFIG_CC_IS_CLANG
81 cflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mabi=elfv1)
82 cflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mcall-aixdesc)
83 aflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mabi=elfv1)
84 aflags-$(CONFIG_PPC64_ELF_ABI_V2) += -mabi=elfv2
88 ifndef CONFIG_CC_IS_CLANG
89 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
92 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
93 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
94 aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
95 aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
97 ifeq ($(HAS_BIARCH),y)
98 KBUILD_CFLAGS += -m$(BITS)
99 KBUILD_AFLAGS += -m$(BITS)
100 KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION)
103 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls
105 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13
107 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2
110 LDFLAGS_vmlinux-y := -Bstatic
111 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
112 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) += -z notext
113 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
116 ifndef CONFIG_PPC_KERNEL_PCREL
117 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
118 # -mcmodel=medium breaks modules because it uses 32bit offsets from
119 # the TOC pointer to create pointers where possible. Pointers into the
120 # percpu data area are created by this method.
122 # The kernel module loader relocates the percpu data section from the
123 # original location (starting with 0xd...) to somewhere in the base
124 # kernel percpu data space (starting with 0xc...). We need a full
125 # 64bit relocation for this to work, hence -mcmodel=large.
126 KBUILD_CFLAGS_MODULE += -mcmodel=large
128 export NO_MINIMAL_TOC := -mno-minimal-toc
133 CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
134 ifdef CONFIG_PPC64_ELF_ABI_V2
135 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
137 ifndef CONFIG_CC_IS_CLANG
138 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
139 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
142 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
143 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
144 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mlong-double-128)
146 # Clang unconditionally reserves r2 on ppc32 and does not support the flag
147 # https://llvm.org/pr39555
148 CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2)
150 # Clang doesn't support -mmultiple / -mno-multiple
151 # https://llvm.org/pr39556
152 CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD))
154 CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
156 ifdef CONFIG_FUNCTION_TRACER
157 ifdef CONFIG_ARCH_USING_PATCHABLE_FUNCTION_ENTRY
158 KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
159 CC_FLAGS_FTRACE := -fpatchable-function-entry=2
161 CC_FLAGS_FTRACE := -pg
162 ifdef CONFIG_MPROFILE_KERNEL
163 CC_FLAGS_FTRACE += -mprofile-kernel
168 CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU)
169 AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU)
171 CFLAGS-y += $(CONFIG_TUNE_CPU)
173 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
175 KBUILD_CPPFLAGS += -I $(srctree)/arch/powerpc $(asinstr)
176 KBUILD_AFLAGS += $(AFLAGS-y)
177 KBUILD_CFLAGS += $(call cc-option,-msoft-float)
178 KBUILD_CFLAGS += $(CFLAGS-y)
179 CPP = $(CC) -E $(KBUILD_CFLAGS)
181 CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
182 ifdef CONFIG_CPU_BIG_ENDIAN
183 CHECKFLAGS += -D__BIG_ENDIAN__
185 CHECKFLAGS += -D__LITTLE_ENDIAN__
188 ifdef CONFIG_476FPE_ERR46
189 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
190 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
194 ifdef CONFIG_PPC_KERNEL_PREFIXED
195 KBUILD_CFLAGS += $(call cc-option,-mprefixed)
197 KBUILD_CFLAGS += $(call cc-option,-mno-prefixed)
199 ifdef CONFIG_PPC_KERNEL_PCREL
200 KBUILD_CFLAGS += $(call cc-option,-mpcrel)
202 KBUILD_CFLAGS += $(call cc-option,-mno-pcrel)
205 # No AltiVec or VSX or MMA instructions when building kernel
206 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
207 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
208 KBUILD_CFLAGS += $(call cc-option,-mno-mma)
210 # No SPE instruction when building kernel
211 # (We use all available options to help semi-broken compilers)
212 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
213 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
215 # Don't emit .eh_frame since we have no use for it
216 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
218 # Never use string load/store instructions as they are
219 # often slow when they are implemented at all
220 KBUILD_CFLAGS += $(call cc-option,-mno-string)
222 KBUILD_AFLAGS += $(aflags-y)
223 KBUILD_CFLAGS += $(cflags-y)
225 # Default to zImage, override when needed
228 # With make 3.82 we cannot mix normal and wildcard targets
229 BOOT_TARGETS1 := zImage zImage.initrd uImage
230 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
232 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
234 boot := arch/powerpc/boot
236 $(BOOT_TARGETS1): vmlinux
237 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
238 $(BOOT_TARGETS2): vmlinux
239 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
242 PHONY += bootwrapper_install
244 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
246 include $(srctree)/scripts/Makefile.defconf
248 generated_configs += ppc64le_defconfig
250 $(call merge_into_defconfig,ppc64_defconfig,le)
252 generated_configs += ppc64le_guest_defconfig
253 ppc64le_guest_defconfig:
254 $(call merge_into_defconfig,ppc64_defconfig,le guest kvm_guest)
256 generated_configs += ppc64_guest_defconfig
257 ppc64_guest_defconfig:
258 $(call merge_into_defconfig,ppc64_defconfig,be guest kvm_guest)
260 generated_configs += pseries_le_defconfig
261 pseries_le_defconfig: ppc64le_guest_defconfig
263 generated_configs += pseries_defconfig
264 pseries_defconfig: ppc64le_guest_defconfig
266 generated_configs += powernv_be_defconfig
267 powernv_be_defconfig:
268 $(call merge_into_defconfig,powernv_defconfig,be)
270 generated_configs += mpc85xx_defconfig
272 $(call merge_into_defconfig,mpc85xx_base.config,\
273 85xx-32bit 85xx-hw fsl-emb-nonhw)
275 generated_configs += mpc85xx_smp_defconfig
276 mpc85xx_smp_defconfig:
277 $(call merge_into_defconfig,mpc85xx_base.config,\
278 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
280 generated_configs += corenet32_smp_defconfig
281 corenet32_smp_defconfig:
282 $(call merge_into_defconfig,corenet_base.config,\
283 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
285 generated_configs += corenet64_smp_defconfig
286 corenet64_smp_defconfig:
287 $(call merge_into_defconfig,corenet_base.config,\
288 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
290 generated_configs += mpc86xx_defconfig
292 $(call merge_into_defconfig,mpc86xx_base.config,\
293 86xx-hw fsl-emb-nonhw)
295 generated_configs += mpc86xx_smp_defconfig
296 mpc86xx_smp_defconfig:
297 $(call merge_into_defconfig,mpc86xx_base.config,\
298 86xx-smp 86xx-hw fsl-emb-nonhw)
300 generated_configs += ppc32_allmodconfig
302 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
303 -f $(srctree)/Makefile allmodconfig
305 generated_configs += ppc40x_allmodconfig
307 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/40x.config \
308 -f $(srctree)/Makefile allmodconfig
310 generated_configs += ppc44x_allmodconfig
312 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/44x.config \
313 -f $(srctree)/Makefile allmodconfig
315 generated_configs += ppc8xx_allmodconfig
317 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/8xx.config \
318 -f $(srctree)/Makefile allmodconfig
320 generated_configs += ppc85xx_allmodconfig
321 ppc85xx_allmodconfig:
322 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-32bit.config \
323 -f $(srctree)/Makefile allmodconfig
325 generated_configs += ppc_defconfig
327 $(call merge_into_defconfig,book3s_32.config,)
329 generated_configs += ppc64le_allmodconfig
330 ppc64le_allmodconfig:
331 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
332 -f $(srctree)/Makefile allmodconfig
334 generated_configs += ppc64le_allnoconfig
336 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \
337 -f $(srctree)/Makefile allnoconfig
339 generated_configs += ppc64_book3e_allmodconfig
340 ppc64_book3e_allmodconfig:
341 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
342 -f $(srctree)/Makefile allmodconfig
344 generated_configs += ppc32_randconfig
346 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \
347 -f $(srctree)/Makefile randconfig
349 generated_configs += ppc64_randconfig
351 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \
352 -f $(srctree)/Makefile randconfig
354 PHONY += $(generated_configs)
357 echo '* zImage - Build default images selected by kernel config'
358 echo ' zImage.* - Compressed kernel image (arch/powerpc/boot/zImage.*)'
359 echo ' uImage - U-Boot native image format'
360 echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
361 echo ' versions which do not support device trees'
362 echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
363 echo ' simpleImage.<dt> - Firmware independent image.'
364 echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
365 echo ' install - Install kernel using'
366 echo ' (your) ~/bin/$(INSTALLKERNEL) or'
367 echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
368 echo ' install to $$(INSTALL_PATH) and run lilo'
369 echo ' *_defconfig - Select default config from arch/powerpc/configs'
371 echo ' Targets with <dt> embed a device tree blob inside the image'
372 echo ' These targets support board with firmware that does not'
373 echo ' support passing a device tree directly. Replace <dt> with the'
374 echo ' name of a dts file from the arch/powerpc/boot/dts/ directory'
375 echo ' (minus the .dts extension).'
377 $(foreach cfg,$(generated_configs),
378 printf " %-27s - Build for %s\\n" $(cfg) $(subst _defconfig,,$(cfg));)
385 ifeq ($(KBUILD_EXTMOD),)
386 # We need to generate vdso-offsets.h before compiling certain files in kernel/.
387 # In order to do that, we should use the archprepare target, but we can't since
388 # asm-offsets.h is included in some files used to generate vdso-offsets.h, and
389 # asm-offsets.h is built in prepare0, for which archprepare is a dependency.
390 # Therefore we need to generate the header after prepare0 has been made, hence
392 prepare: vdso_prepare
393 vdso_prepare: prepare0
394 $(if $(CONFIG_VDSO32),$(Q)$(MAKE) \
395 $(build)=arch/powerpc/kernel/vdso include/generated/vdso32-offsets.h)
396 $(if $(CONFIG_PPC64),$(Q)$(MAKE) \
397 $(build)=arch/powerpc/kernel/vdso include/generated/vdso64-offsets.h)
400 archprepare: checkbin
403 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all
405 ifdef CONFIG_STACKPROTECTOR
406 prepare: stack_protector_prepare
408 PHONY += stack_protector_prepare
409 stack_protector_prepare: prepare0
411 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
413 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
419 @if test "x${CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT}" = "xy" -a \
420 "x${CONFIG_LD_IS_BFD}" = "xy" -a \
421 "${CONFIG_LD_VERSION}" = "23700" ; then \
422 echo -n '*** binutils 2.37 drops unused section symbols, which recordmcount ' ; \
423 echo 'is unable to handle.' ; \
424 echo '*** Please use a different binutils version.' ; \