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 KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/powerpc/kernel/module.lds
69 ifeq ($(call ld-ifversion, -ge, 225000000, y),y)
70 # Have the linker provide sfpr if possible.
71 # There is a corresponding test in arch/powerpc/lib/Makefile
72 KBUILD_LDFLAGS_MODULE += --save-restore-funcs
74 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
78 ifdef CONFIG_CPU_LITTLE_ENDIAN
79 KBUILD_CFLAGS += -mlittle-endian
82 GNUTARGET := powerpcle
83 MULTIPLEWORD := -mno-multiple
84 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
86 KBUILD_CFLAGS += $(call cc-option,-mbig-endian)
90 MULTIPLEWORD := -mmultiple
94 cflags-$(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
100 ifndef CONFIG_CC_IS_CLANG
101 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
104 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
105 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
106 aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
107 aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
109 ifeq ($(HAS_BIARCH),y)
110 KBUILD_CFLAGS += -m$(BITS)
111 KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS)
112 KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION)
113 KBUILD_ARFLAGS += --target=elf$(BITS)-$(GNUTARGET)
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)
126 LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn)
129 ifeq ($(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) := $(call cc-option,-mtraceback=no)
145 ifdef CONFIG_CPU_LITTLE_ENDIAN
146 CFLAGS-$(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) += $(call cc-option,-mabi=elfv1)
153 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
154 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
156 # Clang unconditionally reserves r2 on ppc32 and does not support the flag
157 # https://bugs.llvm.org/show_bug.cgi?id=39555
158 CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2)
160 # Clang doesn't support -mmultiple / -mno-multiple
161 # https://bugs.llvm.org/show_bug.cgi?id=39556
162 CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD))
164 CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
166 ifdef CONFIG_PPC_BOOK3S_64
167 ifdef CONFIG_CPU_LITTLE_ENDIAN
168 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
169 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
171 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
172 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
175 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
178 ifdef CONFIG_FUNCTION_TRACER
179 CC_FLAGS_FTRACE := -pg
180 ifdef CONFIG_MPROFILE_KERNEL
181 CC_FLAGS_FTRACE += -mprofile-kernel
183 # Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8
184 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199
185 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828
186 ifndef CONFIG_CC_IS_CLANG
187 CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog)
191 CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
193 # Altivec option not allowed with e500mc64 in GCC.
195 E5500_CPU := -mcpu=powerpc64
197 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
199 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
200 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
203 ifdef CONFIG_PPC_E500MC
204 CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
206 CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
210 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
212 KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr)
213 KBUILD_AFLAGS += $(AFLAGS-y)
214 KBUILD_CFLAGS += $(call cc-option,-msoft-float)
215 KBUILD_CFLAGS += -pipe $(CFLAGS-y)
216 CPP = $(CC) -E $(KBUILD_CFLAGS)
218 CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
219 ifdef CONFIG_CPU_BIG_ENDIAN
220 CHECKFLAGS += -D__BIG_ENDIAN__
222 CHECKFLAGS += -D__LITTLE_ENDIAN__
225 ifdef CONFIG_476FPE_ERR46
226 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
227 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
230 # No AltiVec or VSX instructions when building kernel
231 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
232 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
234 # No SPE instruction when building kernel
235 # (We use all available options to help semi-broken compilers)
236 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
237 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
239 # FIXME: the module load should be taught about the additional relocs
241 # revert to pre-gcc-4.4 behaviour of .eh_frame
242 KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
244 # Never use string load/store instructions as they are
245 # often slow when they are implemented at all
246 KBUILD_CFLAGS += $(call cc-option,-mno-string)
248 cpu-as-$(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 += ppc64le_guest_defconfig
321 ppc64le_guest_defconfig:
322 $(call merge_into_defconfig,ppc64_defconfig,le guest)
324 PHONY += ppc64_guest_defconfig
325 ppc64_guest_defconfig:
326 $(call merge_into_defconfig,ppc64_defconfig,be guest)
328 PHONY += powernv_be_defconfig
329 powernv_be_defconfig:
330 $(call merge_into_defconfig,powernv_defconfig,be)
332 PHONY += mpc85xx_defconfig
334 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
335 85xx-32bit 85xx-hw fsl-emb-nonhw)
337 PHONY += mpc85xx_smp_defconfig
338 mpc85xx_smp_defconfig:
339 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
340 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
342 PHONY += corenet32_smp_defconfig
343 corenet32_smp_defconfig:
344 $(call merge_into_defconfig,corenet_basic_defconfig,\
345 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
347 PHONY += corenet64_smp_defconfig
348 corenet64_smp_defconfig:
349 $(call merge_into_defconfig,corenet_basic_defconfig,\
350 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
352 PHONY += mpc86xx_defconfig
354 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
355 86xx-hw fsl-emb-nonhw)
357 PHONY += mpc86xx_smp_defconfig
358 mpc86xx_smp_defconfig:
359 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
360 86xx-smp 86xx-hw fsl-emb-nonhw)
362 PHONY += ppc32_allmodconfig
364 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
365 -f $(srctree)/Makefile allmodconfig
367 PHONY += ppc_defconfig
369 $(call merge_into_defconfig,book3s_32.config,)
371 PHONY += ppc64le_allmodconfig
372 ppc64le_allmodconfig:
373 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
374 -f $(srctree)/Makefile allmodconfig
376 PHONY += ppc64_book3e_allmodconfig
377 ppc64_book3e_allmodconfig:
378 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
379 -f $(srctree)/Makefile allmodconfig
382 @echo '* zImage - Build default images selected by kernel config'
383 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
384 @echo ' uImage - U-Boot native image format'
385 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
386 @echo ' versions which do not support device trees'
387 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
388 @echo ' simpleImage.<dt> - Firmware independent image.'
389 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
390 @echo ' install - Install kernel using'
391 @echo ' (your) ~/bin/$(INSTALLKERNEL) or'
392 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
393 @echo ' install to $$(INSTALL_PATH) and run lilo'
394 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
396 @echo ' Targets with <dt> embed a device tree blob inside the image'
397 @echo ' These targets support board with firmware that does not'
398 @echo ' support passing a device tree directly. Replace <dt> with the'
399 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
400 @echo ' (minus the .dts extension).'
404 $(Q)$(MAKE) $(build)=$(boot) install
408 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
411 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
415 $(Q)$(MAKE) $(clean)=$(boot)
417 archprepare: checkbin
420 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all
422 ifdef CONFIG_STACKPROTECTOR
423 prepare: stack_protector_prepare
425 stack_protector_prepare: prepare0
427 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
429 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
434 prepare: task_cpu_prepare
436 task_cpu_prepare: prepare0
437 $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h))
440 # Check toolchain versions:
441 # - gcc-4.6 is the minimum kernel-wide version so nothing required.
443 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
444 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
445 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
446 echo 'in some circumstances.' ; \
447 echo -n '*** Please use a different binutils version.' ; \