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 LDFLAGS_vmlinux-y := -Bstatic
116 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
117 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
118 LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn)
121 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
122 # -mcmodel=medium breaks modules because it uses 32bit offsets from
123 # the TOC pointer to create pointers where possible. Pointers into the
124 # percpu data area are created by this method.
126 # The kernel module loader relocates the percpu data section from the
127 # original location (starting with 0xd...) to somewhere in the base
128 # kernel percpu data space (starting with 0xc...). We need a full
129 # 64bit relocation for this to work, hence -mcmodel=large.
130 KBUILD_CFLAGS_MODULE += -mcmodel=large
132 export NO_MINIMAL_TOC := -mno-minimal-toc
136 CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
137 ifdef CONFIG_CPU_LITTLE_ENDIAN
138 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
139 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
141 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
142 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
143 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
145 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
146 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
148 CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD)
149 CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
151 ifdef CONFIG_PPC_BOOK3S_64
152 ifdef CONFIG_CPU_LITTLE_ENDIAN
153 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
154 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
156 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
157 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
160 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
163 ifdef CONFIG_MPROFILE_KERNEL
164 CC_FLAGS_FTRACE := -pg -mprofile-kernel
167 CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
169 # Altivec option not allowed with e500mc64 in GCC.
171 E5500_CPU := -mcpu=powerpc64
173 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
175 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
176 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
179 ifdef CONFIG_PPC_E500MC
180 CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
182 CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
186 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
188 KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr)
189 KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y)
190 KBUILD_CFLAGS += $(call cc-option,-msoft-float)
191 KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y)
192 CPP = $(CC) -E $(KBUILD_CFLAGS)
194 CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
195 ifdef CONFIG_CPU_BIG_ENDIAN
196 CHECKFLAGS += -D__BIG_ENDIAN__
198 CHECKFLAGS += -D__LITTLE_ENDIAN__
201 ifdef CONFIG_476FPE_ERR46
202 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
203 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
206 # No AltiVec or VSX instructions when building kernel
207 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
208 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
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 # Enable unit-at-a-time mode when possible. It shrinks the
216 # kernel considerably.
217 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
219 # FIXME: the module load should be taught about the additional relocs
221 # revert to pre-gcc-4.4 behaviour of .eh_frame
222 KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
224 # Never use string load/store instructions as they are
225 # often slow when they are implemented at all
226 KBUILD_CFLAGS += $(call cc-option,-mno-string)
229 KBUILD_CFLAGS += -mcpu=powerpc
232 # Work around a gcc code-gen bug with -fno-omit-frame-pointer.
233 ifdef CONFIG_FUNCTION_TRACER
234 KBUILD_CFLAGS += -mno-sched-epilog
237 cpu-as-$(CONFIG_4xx) += -Wa,-m405
238 cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
239 cpu-as-$(CONFIG_E200) += -Wa,-me200
240 cpu-as-$(CONFIG_E500) += -Wa,-me500
241 cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4
242 cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc)
244 KBUILD_AFLAGS += $(cpu-as-y)
245 KBUILD_CFLAGS += $(cpu-as-y)
247 KBUILD_AFLAGS += $(aflags-y)
248 KBUILD_CFLAGS += $(cflags-y)
250 head-y := arch/powerpc/kernel/head_$(BITS).o
251 head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o
252 head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
253 head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
254 head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
256 head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
257 head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
258 head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
259 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
261 core-y += arch/powerpc/kernel/ \
264 arch/powerpc/sysdev/ \
265 arch/powerpc/platforms/ \
266 arch/powerpc/math-emu/ \
267 arch/powerpc/crypto/ \
269 core-$(CONFIG_XMON) += arch/powerpc/xmon/
270 core-$(CONFIG_KVM) += arch/powerpc/kvm/
271 core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/
272 core-$(CONFIG_KEXEC_FILE) += arch/powerpc/purgatory/
274 drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
276 # Default to zImage, override when needed
279 # With make 3.82 we cannot mix normal and wildcard targets
280 BOOT_TARGETS1 := zImage zImage.initrd uImage
281 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
283 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
285 boot := arch/$(ARCH)/boot
287 $(BOOT_TARGETS1): vmlinux
288 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
289 $(BOOT_TARGETS2): vmlinux
290 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
294 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
297 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
299 # Used to create 'merged defconfigs'
300 # To use it $(call) it with the first argument as the base defconfig
301 # and the second argument as a space separated list of .config files to merge,
302 # without the .config suffix.
303 define merge_into_defconfig
304 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
305 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
306 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
307 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
310 PHONY += pseries_le_defconfig
311 pseries_le_defconfig:
312 $(call merge_into_defconfig,pseries_defconfig,le)
314 PHONY += ppc64le_defconfig
316 $(call merge_into_defconfig,ppc64_defconfig,le)
318 PHONY += powernv_be_defconfig
319 powernv_be_defconfig:
320 $(call merge_into_defconfig,powernv_defconfig,be)
322 PHONY += mpc85xx_defconfig
324 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
325 85xx-32bit 85xx-hw fsl-emb-nonhw)
327 PHONY += mpc85xx_smp_defconfig
328 mpc85xx_smp_defconfig:
329 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
330 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
332 PHONY += corenet32_smp_defconfig
333 corenet32_smp_defconfig:
334 $(call merge_into_defconfig,corenet_basic_defconfig,\
335 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
337 PHONY += corenet64_smp_defconfig
338 corenet64_smp_defconfig:
339 $(call merge_into_defconfig,corenet_basic_defconfig,\
340 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
342 PHONY += mpc86xx_defconfig
344 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
345 86xx-hw fsl-emb-nonhw)
347 PHONY += mpc86xx_smp_defconfig
348 mpc86xx_smp_defconfig:
349 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
350 86xx-smp 86xx-hw fsl-emb-nonhw)
352 PHONY += ppc32_allmodconfig
354 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
355 -f $(srctree)/Makefile allmodconfig
357 PHONY += ppc64le_allmodconfig
358 ppc64le_allmodconfig:
359 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
360 -f $(srctree)/Makefile allmodconfig
362 PHONY += ppc64_book3e_allmodconfig
363 ppc64_book3e_allmodconfig:
364 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
365 -f $(srctree)/Makefile allmodconfig
368 @echo '* zImage - Build default images selected by kernel config'
369 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
370 @echo ' uImage - U-Boot native image format'
371 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
372 @echo ' versions which do not support device trees'
373 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
374 @echo ' simpleImage.<dt> - Firmware independent image.'
375 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
376 @echo ' install - Install kernel using'
377 @echo ' (your) ~/bin/$(INSTALLKERNEL) or'
378 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
379 @echo ' install to $$(INSTALL_PATH) and run lilo'
380 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
382 @echo ' Targets with <dt> embed a device tree blob inside the image'
383 @echo ' These targets support board with firmware that does not'
384 @echo ' support passing a device tree directly. Replace <dt> with the'
385 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
386 @echo ' (minus the .dts extension).'
390 $(Q)$(MAKE) $(build)=$(boot) install
394 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
396 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
399 $(Q)$(MAKE) $(clean)=$(boot)
401 archprepare: checkbin
403 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
404 # to stdout and these checks are run even on install targets.
405 TOUT := .tmp_gas_check
407 # Check gcc and binutils versions:
408 # - gcc-3.4 and binutils-2.14 are a fatal combination
409 # - Require gcc 4.0 or above on 64-bit
410 # - gcc-4.2.0 has issues compiling modules on 64-bit
412 @if test "$(cc-name)" != "clang" \
413 && test "$(cc-version)" = "0304" ; then \
414 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
415 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
416 echo 'correctly with gcc-3.4 and your version of binutils.'; \
417 echo '*** Please upgrade your binutils or downgrade your gcc'; \
421 @if test "$(cc-name)" != "clang" \
422 && test "$(cc-version)" -lt "0400" \
423 && test "x${CONFIG_PPC64}" = "xy" ; then \
424 echo -n "Sorry, GCC v4.0 or above is required to build " ; \
425 echo "the 64-bit powerpc kernel." ; \
428 @if test "$(cc-name)" != "clang" \
429 && test "$(cc-fullversion)" = "040200" \
430 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
431 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
432 echo 'kernel with modules enabled.' ; \
433 echo -n '*** Please use a different GCC version or ' ; \
434 echo 'disable kernel modules' ; \
437 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
438 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
439 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
440 echo 'in some circumstances.' ; \
441 echo -n '*** Please use a different binutils version.' ; \
446 CLEAN_FILES += $(TOUT)