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 ($(CROSS32_COMPILE),)
23 # These options will be overridden by any -mcpu option that the CPU
24 # or platform code sets later on the command line, but they are needed
25 # to set a sane 32-bit cpu target for the 64-bit cross compiler which
26 # may default to the wrong ISA.
27 KBUILD_CFLAGS += -mcpu=powerpc
28 KBUILD_AFLAGS += -mcpu=powerpc
33 ifeq ($(CROSS_COMPILE),)
34 KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
36 KBUILD_DEFCONFIG := ppc64_defconfig
40 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
43 NM := $(NM) --synthetic
47 # BITS is used as extension for files which are available in a 32 bit
48 # and a 64 bit version to simplify shared Makefiles.
49 # e.g.: obj-y += foo_$(BITS).o
59 machine-$(CONFIG_PPC64) += 64
60 machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
61 UTS_MACHINE := $(subst $(space),,$(machine-y))
63 # XXX This needs to be before we override LD below
65 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
67 KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/powerpc/kernel/module.lds
68 ifeq ($(call ld-ifversion, -ge, 225000000, 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 += $(call cc-option,-mbig-endian)
89 MULTIPLEWORD := -mmultiple
93 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
94 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc)
95 aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
96 aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2
99 ifneq ($(cc-name),clang)
100 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
103 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
104 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
105 aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
106 aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
108 ifeq ($(HAS_BIARCH),y)
109 KBUILD_CFLAGS += -m$(BITS)
110 KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS)
111 KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION)
112 KBUILD_ARFLAGS += --target=elf$(BITS)-$(GNUTARGET)
115 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls
117 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13
119 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2
122 LDFLAGS_vmlinux-y := -Bstatic
123 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
124 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
125 LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn)
128 ifeq ($(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) := $(call cc-option,-mtraceback=no)
144 ifdef CONFIG_CPU_LITTLE_ENDIAN
145 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
146 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
148 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
149 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
150 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
152 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
153 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
155 CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD)
156 CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
158 ifdef CONFIG_PPC_BOOK3S_64
159 ifdef CONFIG_CPU_LITTLE_ENDIAN
160 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
161 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
163 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
164 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
167 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
170 ifdef CONFIG_FUNCTION_TRACER
171 CC_FLAGS_FTRACE := -pg
172 ifdef CONFIG_MPROFILE_KERNEL
173 CC_FLAGS_FTRACE += -mprofile-kernel
175 # Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8
176 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199
177 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828
178 ifneq ($(cc-name),clang)
179 CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog)
183 CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
185 # Altivec option not allowed with e500mc64 in GCC.
187 E5500_CPU := -mcpu=powerpc64
189 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
191 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
192 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
195 ifdef CONFIG_PPC_E500MC
196 CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
198 CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
202 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
204 KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr)
205 KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y)
206 KBUILD_CFLAGS += $(call cc-option,-msoft-float)
207 KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y)
208 CPP = $(CC) -E $(KBUILD_CFLAGS)
210 CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
211 ifdef CONFIG_CPU_BIG_ENDIAN
212 CHECKFLAGS += -D__BIG_ENDIAN__
214 CHECKFLAGS += -D__LITTLE_ENDIAN__
217 ifdef CONFIG_476FPE_ERR46
218 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
219 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
222 # No AltiVec or VSX instructions when building kernel
223 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
224 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
226 # No SPE instruction when building kernel
227 # (We use all available options to help semi-broken compilers)
228 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
229 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
231 # Enable unit-at-a-time mode when possible. It shrinks the
232 # kernel considerably.
233 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
235 # FIXME: the module load should be taught about the additional relocs
237 # revert to pre-gcc-4.4 behaviour of .eh_frame
238 KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
240 # Never use string load/store instructions as they are
241 # often slow when they are implemented at all
242 KBUILD_CFLAGS += $(call cc-option,-mno-string)
245 KBUILD_CFLAGS += -mcpu=powerpc
248 cpu-as-$(CONFIG_4xx) += -Wa,-m405
249 cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
250 cpu-as-$(CONFIG_E200) += -Wa,-me200
251 cpu-as-$(CONFIG_E500) += -Wa,-me500
253 # When using '-many -mpower4' gas will first try and find a matching power4
254 # mnemonic and failing that it will allow any valid mnemonic that GAS knows
255 # about. GCC will pass -many to GAS when assembling, clang does not.
256 cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-many
257 cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc)
259 KBUILD_AFLAGS += $(cpu-as-y)
260 KBUILD_CFLAGS += $(cpu-as-y)
262 KBUILD_AFLAGS += $(aflags-y)
263 KBUILD_CFLAGS += $(cflags-y)
265 head-y := arch/powerpc/kernel/head_$(BITS).o
266 head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o
267 head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
268 head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
269 head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
271 head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
272 head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
273 head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
274 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
276 # See arch/powerpc/Kbuild for content of core part of the kernel
277 core-y += arch/powerpc/
279 drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
281 # Default to zImage, override when needed
284 # With make 3.82 we cannot mix normal and wildcard targets
285 BOOT_TARGETS1 := zImage zImage.initrd uImage
286 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
288 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
290 boot := arch/$(ARCH)/boot
292 $(BOOT_TARGETS1): vmlinux
293 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
294 $(BOOT_TARGETS2): vmlinux
295 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
299 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
301 # Used to create 'merged defconfigs'
302 # To use it $(call) it with the first argument as the base defconfig
303 # and the second argument as a space separated list of .config files to merge,
304 # without the .config suffix.
305 define merge_into_defconfig
306 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
307 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
308 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
309 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
312 PHONY += pseries_le_defconfig
313 pseries_le_defconfig:
314 $(call merge_into_defconfig,pseries_defconfig,le)
316 PHONY += ppc64le_defconfig
318 $(call merge_into_defconfig,ppc64_defconfig,le)
320 PHONY += powernv_be_defconfig
321 powernv_be_defconfig:
322 $(call merge_into_defconfig,powernv_defconfig,be)
324 PHONY += mpc85xx_defconfig
326 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
327 85xx-32bit 85xx-hw fsl-emb-nonhw)
329 PHONY += mpc85xx_smp_defconfig
330 mpc85xx_smp_defconfig:
331 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
332 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
334 PHONY += corenet32_smp_defconfig
335 corenet32_smp_defconfig:
336 $(call merge_into_defconfig,corenet_basic_defconfig,\
337 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
339 PHONY += corenet64_smp_defconfig
340 corenet64_smp_defconfig:
341 $(call merge_into_defconfig,corenet_basic_defconfig,\
342 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
344 PHONY += mpc86xx_defconfig
346 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
347 86xx-hw fsl-emb-nonhw)
349 PHONY += mpc86xx_smp_defconfig
350 mpc86xx_smp_defconfig:
351 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
352 86xx-smp 86xx-hw fsl-emb-nonhw)
354 PHONY += ppc32_allmodconfig
356 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
357 -f $(srctree)/Makefile allmodconfig
359 PHONY += ppc64le_allmodconfig
360 ppc64le_allmodconfig:
361 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
362 -f $(srctree)/Makefile allmodconfig
364 PHONY += ppc64_book3e_allmodconfig
365 ppc64_book3e_allmodconfig:
366 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
367 -f $(srctree)/Makefile allmodconfig
370 @echo '* zImage - Build default images selected by kernel config'
371 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
372 @echo ' uImage - U-Boot native image format'
373 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
374 @echo ' versions which do not support device trees'
375 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
376 @echo ' simpleImage.<dt> - Firmware independent image.'
377 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
378 @echo ' install - Install kernel using'
379 @echo ' (your) ~/bin/$(INSTALLKERNEL) or'
380 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
381 @echo ' install to $$(INSTALL_PATH) and run lilo'
382 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
384 @echo ' Targets with <dt> embed a device tree blob inside the image'
385 @echo ' These targets support board with firmware that does not'
386 @echo ' support passing a device tree directly. Replace <dt> with the'
387 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
388 @echo ' (minus the .dts extension).'
392 $(Q)$(MAKE) $(build)=$(boot) install
396 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
398 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
401 $(Q)$(MAKE) $(clean)=$(boot)
403 archprepare: checkbin
405 ifdef CONFIG_STACKPROTECTOR
406 prepare: stack_protector_prepare
408 stack_protector_prepare: prepare0
410 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
412 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
416 # Check toolchain versions:
417 # - gcc-4.6 is the minimum kernel-wide version so nothing required.
419 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
420 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
421 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
422 echo 'in some circumstances.' ; \
423 echo -n '*** Please use a different binutils version.' ; \