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, 225000000, 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$(BITS)
96 KBUILD_LDFLAGS += -m elf$(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 := $(LDFLAGS_vmlinux-y)
111 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
112 # -mcmodel=medium breaks modules because it uses 32bit offsets from
113 # the TOC pointer to create pointers where possible. Pointers into the
114 # percpu data area are created by this method.
116 # The kernel module loader relocates the percpu data section from the
117 # original location (starting with 0xd...) to somewhere in the base
118 # kernel percpu data space (starting with 0xc...). We need a full
119 # 64bit relocation for this to work, hence -mcmodel=large.
120 KBUILD_CFLAGS_MODULE += -mcmodel=large
122 export NO_MINIMAL_TOC := -mno-minimal-toc
126 CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
127 ifndef CONFIG_CC_IS_CLANG
128 ifdef CONFIG_CPU_LITTLE_ENDIAN
129 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
130 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
132 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
133 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
134 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
137 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
138 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
140 # Clang unconditionally reserves r2 on ppc32 and does not support the flag
141 # https://bugs.llvm.org/show_bug.cgi?id=39555
142 CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2)
144 # Clang doesn't support -mmultiple / -mno-multiple
145 # https://bugs.llvm.org/show_bug.cgi?id=39556
146 CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD))
148 CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
150 ifdef CONFIG_PPC_BOOK3S_64
151 ifdef CONFIG_CPU_LITTLE_ENDIAN
152 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
153 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
155 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
156 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power4
158 else ifdef CONFIG_PPC_BOOK3E_64
159 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
162 ifdef CONFIG_FUNCTION_TRACER
163 CC_FLAGS_FTRACE := -pg
164 ifdef CONFIG_MPROFILE_KERNEL
165 CC_FLAGS_FTRACE += -mprofile-kernel
167 # Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8
168 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199
169 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828
170 ifndef CONFIG_CC_IS_CLANG
171 CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog)
175 CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
176 AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
178 # Altivec option not allowed with e500mc64 in GCC.
180 E5500_CPU := -mcpu=powerpc64
182 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
184 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
185 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
187 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
189 KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr)
190 KBUILD_AFLAGS += $(AFLAGS-y)
191 KBUILD_CFLAGS += $(call cc-option,-msoft-float)
192 KBUILD_CFLAGS += -pipe $(CFLAGS-y)
193 CPP = $(CC) -E $(KBUILD_CFLAGS)
195 CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
196 ifdef CONFIG_CPU_BIG_ENDIAN
197 CHECKFLAGS += -D__BIG_ENDIAN__
199 CHECKFLAGS += -D__LITTLE_ENDIAN__
202 ifdef CONFIG_476FPE_ERR46
203 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
204 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
207 # No AltiVec or VSX instructions when building kernel
208 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
209 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
211 # No SPE instruction when building kernel
212 # (We use all available options to help semi-broken compilers)
213 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
214 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
216 # Don't emit .eh_frame since we have no use for it
217 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
219 # Never use string load/store instructions as they are
220 # often slow when they are implemented at all
221 KBUILD_CFLAGS += $(call cc-option,-mno-string)
223 cpu-as-$(CONFIG_40x) += -Wa,-m405
224 cpu-as-$(CONFIG_44x) += -Wa,-m440
225 cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
226 cpu-as-$(CONFIG_E500) += -Wa,-me500
228 # When using '-many -mpower4' gas will first try and find a matching power4
229 # mnemonic and failing that it will allow any valid mnemonic that GAS knows
230 # about. GCC will pass -many to GAS when assembling, clang does not.
231 cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-many
232 cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc)
234 KBUILD_AFLAGS += $(cpu-as-y)
235 KBUILD_CFLAGS += $(cpu-as-y)
237 KBUILD_AFLAGS += $(aflags-y)
238 KBUILD_CFLAGS += $(cflags-y)
240 head-$(CONFIG_PPC64) := arch/powerpc/kernel/head_64.o
241 head-$(CONFIG_PPC_BOOK3S_32) := arch/powerpc/kernel/head_book3s_32.o
242 head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o
243 head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
244 head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
245 head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
247 head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
248 head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
249 head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
250 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
252 # See arch/powerpc/Kbuild for content of core part of the kernel
253 core-y += arch/powerpc/
255 drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
257 # Default to zImage, override when needed
260 # With make 3.82 we cannot mix normal and wildcard targets
261 BOOT_TARGETS1 := zImage zImage.initrd uImage
262 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
264 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
266 boot := arch/$(ARCH)/boot
268 $(BOOT_TARGETS1): vmlinux
269 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
270 $(BOOT_TARGETS2): vmlinux
271 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
274 PHONY += bootwrapper_install
276 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
278 # Used to create 'merged defconfigs'
279 # To use it $(call) it with the first argument as the base defconfig
280 # and the second argument as a space separated list of .config files to merge,
281 # without the .config suffix.
282 define merge_into_defconfig
283 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
284 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
285 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
286 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
289 PHONY += pseries_le_defconfig
290 pseries_le_defconfig:
291 $(call merge_into_defconfig,pseries_defconfig,le)
293 PHONY += ppc64le_defconfig
295 $(call merge_into_defconfig,ppc64_defconfig,le)
297 PHONY += ppc64le_guest_defconfig
298 ppc64le_guest_defconfig:
299 $(call merge_into_defconfig,ppc64_defconfig,le guest)
301 PHONY += ppc64_guest_defconfig
302 ppc64_guest_defconfig:
303 $(call merge_into_defconfig,ppc64_defconfig,be guest)
305 PHONY += powernv_be_defconfig
306 powernv_be_defconfig:
307 $(call merge_into_defconfig,powernv_defconfig,be)
309 PHONY += mpc85xx_defconfig
311 $(call merge_into_defconfig,mpc85xx_base.config,\
312 85xx-32bit 85xx-hw fsl-emb-nonhw)
314 PHONY += mpc85xx_smp_defconfig
315 mpc85xx_smp_defconfig:
316 $(call merge_into_defconfig,mpc85xx_base.config,\
317 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
319 PHONY += corenet32_smp_defconfig
320 corenet32_smp_defconfig:
321 $(call merge_into_defconfig,corenet_base.config,\
322 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
324 PHONY += corenet64_smp_defconfig
325 corenet64_smp_defconfig:
326 $(call merge_into_defconfig,corenet_base.config,\
327 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
329 PHONY += mpc86xx_defconfig
331 $(call merge_into_defconfig,mpc86xx_base.config,\
332 86xx-hw fsl-emb-nonhw)
334 PHONY += mpc86xx_smp_defconfig
335 mpc86xx_smp_defconfig:
336 $(call merge_into_defconfig,mpc86xx_base.config,\
337 86xx-smp 86xx-hw fsl-emb-nonhw)
339 PHONY += ppc32_allmodconfig
341 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
342 -f $(srctree)/Makefile allmodconfig
344 PHONY += ppc_defconfig
346 $(call merge_into_defconfig,book3s_32.config,)
348 PHONY += ppc64le_allmodconfig
349 ppc64le_allmodconfig:
350 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
351 -f $(srctree)/Makefile allmodconfig
353 PHONY += ppc64_book3e_allmodconfig
354 ppc64_book3e_allmodconfig:
355 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
356 -f $(srctree)/Makefile allmodconfig
359 @echo '* zImage - Build default images selected by kernel config'
360 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
361 @echo ' uImage - U-Boot native image format'
362 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
363 @echo ' versions which do not support device trees'
364 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
365 @echo ' simpleImage.<dt> - Firmware independent image.'
366 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
367 @echo ' install - Install kernel using'
368 @echo ' (your) ~/bin/$(INSTALLKERNEL) or'
369 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
370 @echo ' install to $$(INSTALL_PATH) and run lilo'
371 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
373 @echo ' Targets with <dt> embed a device tree blob inside the image'
374 @echo ' These targets support board with firmware that does not'
375 @echo ' support passing a device tree directly. Replace <dt> with the'
376 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
377 @echo ' (minus the .dts extension).'
382 $(Q)$(MAKE) $(build)=$(boot) install
384 PHONY += vdso_install
387 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
390 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
394 $(Q)$(MAKE) $(clean)=$(boot)
396 archprepare: checkbin
399 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all
401 ifdef CONFIG_STACKPROTECTOR
402 prepare: stack_protector_prepare
404 PHONY += stack_protector_prepare
405 stack_protector_prepare: prepare0
407 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
409 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
414 prepare: task_cpu_prepare
416 PHONY += task_cpu_prepare
417 task_cpu_prepare: prepare0
418 $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h))
422 # Check toolchain versions:
423 # - gcc-4.6 is the minimum kernel-wide version so nothing required.
425 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
426 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
427 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
428 echo 'in some circumstances.' ; \
429 echo -n '*** Please use a different binutils version.' ; \
432 @if test "x${CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT}" = "xy" -a \
433 "x${CONFIG_LD_IS_BFD}" = "xy" -a \
434 "${CONFIG_LD_VERSION}" = "23700" ; then \
435 echo -n '*** binutils 2.37 drops unused section symbols, which recordmcount ' ; \
436 echo 'is unable to handle.' ; \
437 echo '*** Please use a different binutils version.' ; \