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 CROSS32CC := $(CROSS32_COMPILE)gcc
21 CROSS32AR := $(CROSS32_COMPILE)ar
23 ifeq ($(HAS_BIARCH),y)
24 ifeq ($(CROSS32_COMPILE),)
25 CROSS32CC := $(CC) -m32
26 CROSS32AR := GNUTARGET=elf32-powerpc $(AR)
30 export CROSS32CC CROSS32AR
32 ifeq ($(CROSS_COMPILE),)
33 KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
35 KBUILD_DEFCONFIG := ppc64_defconfig
38 ifeq ($(CONFIG_PPC64),y)
39 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
42 NM := $(NM) --synthetic
46 ifeq ($(CONFIG_PPC64),y)
47 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
53 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
60 # It seems there are times we use this Makefile without
61 # including the config file, but this replicates the old behaviour
62 ifeq ($(CONFIG_WORD_SIZE),)
63 CONFIG_WORD_SIZE := 32
66 UTS_MACHINE := $(OLDARCH)
68 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
71 GNUTARGET := powerpcle
72 MULTIPLEWORD := -mno-multiple
73 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
78 MULTIPLEWORD := -mmultiple
81 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
82 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
83 ifneq ($(cc-name),clang)
84 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
87 aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
88 aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
90 ifeq ($(HAS_BIARCH),y)
91 override AS += -a$(CONFIG_WORD_SIZE)
92 override LD += -m elf$(CONFIG_WORD_SIZE)$(LDEMULATION)
93 override CC += -m$(CONFIG_WORD_SIZE)
94 override AR := GNUTARGET=elf$(CONFIG_WORD_SIZE)-$(GNUTARGET) $(AR)
97 LDFLAGS_vmlinux-y := -Bstatic
98 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
99 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
101 ifeq ($(CONFIG_PPC64),y)
102 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
103 # -mcmodel=medium breaks modules because it uses 32bit offsets from
104 # the TOC pointer to create pointers where possible. Pointers into the
105 # percpu data area are created by this method.
107 # The kernel module loader relocates the percpu data section from the
108 # original location (starting with 0xd...) to somewhere in the base
109 # kernel percpu data space (starting with 0xc...). We need a full
110 # 64bit relocation for this to work, hence -mcmodel=large.
111 KBUILD_CFLAGS_MODULE += -mcmodel=large
113 export NO_MINIMAL_TOC := -mno-minimal-toc
117 CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
118 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
119 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
120 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
122 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
124 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
125 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
126 CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD)
128 ifeq ($(CONFIG_PPC_BOOK3S_64),y)
129 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4)
131 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
134 ifdef CONFIG_MPROFILE_KERNEL
135 ifeq ($(shell $(srctree)/arch/powerpc/scripts/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__),OK)
136 CC_FLAGS_FTRACE := -pg -mprofile-kernel
137 KBUILD_CPPFLAGS += -DCC_USING_MPROFILE_KERNEL
139 # If the user asked for mprofile-kernel but the toolchain doesn't
140 # support it, emit a warning and deliberately break the build later
141 # with mprofile-kernel-not-supported. We would prefer to make this an
142 # error right here, but then the user would never be able to run
143 # oldconfig to change their configuration.
144 $(warning Compiler does not support mprofile-kernel, set CONFIG_DISABLE_MPROFILE_KERNEL)
145 CC_FLAGS_FTRACE := -mprofile-kernel-not-supported
149 CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
150 CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4)
151 CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5)
152 CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6)
153 CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7)
154 CFLAGS-$(CONFIG_POWER8_CPU) += $(call cc-option,-mcpu=power8)
156 # Altivec option not allowed with e500mc64 in GCC.
157 ifeq ($(CONFIG_ALTIVEC),y)
158 E5500_CPU := -mcpu=powerpc64
160 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
162 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
163 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
165 ifeq ($(CONFIG_PPC32),y)
166 ifeq ($(CONFIG_PPC_E500MC),y)
167 CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
169 CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
173 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
175 KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr)
176 KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y)
177 KBUILD_CFLAGS += $(call cc-option,-msoft-float)
178 KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y)
179 CPP = $(CC) -E $(KBUILD_CFLAGS)
181 CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
182 ifdef CONFIG_CPU_BIG_ENDIAN
183 CHECKFLAGS += -D__BIG_ENDIAN__
185 CHECKFLAGS += -D__LITTLE_ENDIAN__
188 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
190 ifeq ($(CONFIG_476FPE_ERR46),y)
191 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
192 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
195 # No AltiVec or VSX instructions when building kernel
196 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
197 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
199 # No SPE instruction when building kernel
200 # (We use all available options to help semi-broken compilers)
201 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
202 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
204 # Enable unit-at-a-time mode when possible. It shrinks the
205 # kernel considerably.
206 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
208 # FIXME: the module load should be taught about the additional relocs
210 # revert to pre-gcc-4.4 behaviour of .eh_frame
211 KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
213 # Never use string load/store instructions as they are
214 # often slow when they are implemented at all
215 KBUILD_CFLAGS += $(call cc-option,-mno-string)
217 ifeq ($(CONFIG_6xx),y)
218 KBUILD_CFLAGS += -mcpu=powerpc
221 # Work around a gcc code-gen bug with -fno-omit-frame-pointer.
222 ifeq ($(CONFIG_FUNCTION_TRACER),y)
223 KBUILD_CFLAGS += -mno-sched-epilog
226 cpu-as-$(CONFIG_4xx) += -Wa,-m405
227 cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
228 cpu-as-$(CONFIG_E200) += -Wa,-me200
230 KBUILD_AFLAGS += $(cpu-as-y)
231 KBUILD_CFLAGS += $(cpu-as-y)
233 KBUILD_AFLAGS += $(aflags-y)
234 KBUILD_CFLAGS += $(cflags-y)
236 head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
237 head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o
238 head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
239 head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
240 head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
242 head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
243 head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
244 head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
245 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
247 core-y += arch/powerpc/kernel/ \
250 arch/powerpc/sysdev/ \
251 arch/powerpc/platforms/ \
252 arch/powerpc/math-emu/ \
253 arch/powerpc/crypto/ \
255 core-$(CONFIG_XMON) += arch/powerpc/xmon/
256 core-$(CONFIG_KVM) += arch/powerpc/kvm/
257 core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/
259 drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
261 # Default to zImage, override when needed
264 # With make 3.82 we cannot mix normal and wildcard targets
265 BOOT_TARGETS1 := zImage zImage.initrd uImage
266 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
268 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
270 boot := arch/$(ARCH)/boot
272 ifeq ($(CONFIG_RELOCATABLE),y)
273 quiet_cmd_relocs_check = CALL $<
274 cmd_relocs_check = $(CONFIG_SHELL) $< "$(OBJDUMP)" "$(obj)/vmlinux"
276 PHONY += relocs_check
277 relocs_check: arch/powerpc/relocs_check.sh vmlinux
278 $(call cmd,relocs_check)
283 $(BOOT_TARGETS1): vmlinux
284 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
285 $(BOOT_TARGETS2): vmlinux
286 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
290 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
293 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
295 # Used to create 'merged defconfigs'
296 # To use it $(call) it with the first argument as the base defconfig
297 # and the second argument as a space separated list of .config files to merge,
298 # without the .config suffix.
299 define merge_into_defconfig
300 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
301 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
302 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
303 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
306 PHONY += pseries_le_defconfig
307 pseries_le_defconfig:
308 $(call merge_into_defconfig,pseries_defconfig,le)
310 PHONY += ppc64le_defconfig
312 $(call merge_into_defconfig,ppc64_defconfig,le)
314 PHONY += mpc85xx_defconfig
316 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
317 85xx-32bit 85xx-hw fsl-emb-nonhw)
319 PHONY += mpc85xx_smp_defconfig
320 mpc85xx_smp_defconfig:
321 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
322 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
324 PHONY += corenet32_smp_defconfig
325 corenet32_smp_defconfig:
326 $(call merge_into_defconfig,corenet_basic_defconfig,\
327 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
329 PHONY += corenet64_smp_defconfig
330 corenet64_smp_defconfig:
331 $(call merge_into_defconfig,corenet_basic_defconfig,\
332 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw)
334 PHONY += mpc86xx_defconfig
336 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
337 86xx-hw fsl-emb-nonhw)
339 PHONY += mpc86xx_smp_defconfig
340 mpc86xx_smp_defconfig:
341 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
342 86xx-smp 86xx-hw fsl-emb-nonhw)
345 @echo '* zImage - Build default images selected by kernel config'
346 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
347 @echo ' uImage - U-Boot native image format'
348 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
349 @echo ' versions which do not support device trees'
350 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
351 @echo ' simpleImage.<dt> - Firmware independent image.'
352 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
353 @echo ' install - Install kernel using'
354 @echo ' (your) ~/bin/$(INSTALLKERNEL) or'
355 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
356 @echo ' install to $$(INSTALL_PATH) and run lilo'
357 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
359 @echo ' Targets with <dt> embed a device tree blob inside the image'
360 @echo ' These targets support board with firmware that does not'
361 @echo ' support passing a device tree directly. Replace <dt> with the'
362 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
363 @echo ' (minus the .dts extension).'
367 $(Q)$(MAKE) $(build)=$(boot) install
370 ifeq ($(CONFIG_PPC64),y)
371 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
373 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
376 $(Q)$(MAKE) $(clean)=$(boot)
378 archprepare: checkbin
380 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
381 # to stdout and these checks are run even on install targets.
382 TOUT := .tmp_gas_check
384 # Check gcc and binutils versions:
385 # - gcc-3.4 and binutils-2.14 are a fatal combination
386 # - Require gcc 4.0 or above on 64-bit
387 # - gcc-4.2.0 has issues compiling modules on 64-bit
389 @if test "$(cc-name)" != "clang" \
390 && test "$(cc-version)" = "0304" ; then \
391 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
392 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
393 echo 'correctly with gcc-3.4 and your version of binutils.'; \
394 echo '*** Please upgrade your binutils or downgrade your gcc'; \
398 @if test "$(cc-name)" != "clang" \
399 && test "$(cc-version)" -lt "0400" \
400 && test "x${CONFIG_PPC64}" = "xy" ; then \
401 echo -n "Sorry, GCC v4.0 or above is required to build " ; \
402 echo "the 64-bit powerpc kernel." ; \
405 @if test "$(cc-name)" != "clang" \
406 && test "$(cc-fullversion)" = "040200" \
407 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
408 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
409 echo 'kernel with modules enabled.' ; \
410 echo -n '*** Please use a different GCC version or ' ; \
411 echo 'disable kernel modules' ; \
414 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
415 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
416 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
417 echo 'in some circumstances.' ; \
418 echo -n '*** Please use a different binutils version.' ; \
423 CLEAN_FILES += $(TOUT)