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)
70 override CROSS32AS += -mlittle-endian
72 GNUTARGET := powerpcle
73 MULTIPLEWORD := -mno-multiple
74 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
79 MULTIPLEWORD := -mmultiple
83 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
84 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc)
85 aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
86 aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2
89 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
90 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
91 ifneq ($(cc-name),clang)
92 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
95 aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
96 aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
98 ifeq ($(HAS_BIARCH),y)
99 override AS += -a$(CONFIG_WORD_SIZE)
100 override LD += -m elf$(CONFIG_WORD_SIZE)$(LDEMULATION)
101 override CC += -m$(CONFIG_WORD_SIZE)
102 override AR := GNUTARGET=elf$(CONFIG_WORD_SIZE)-$(GNUTARGET) $(AR)
105 LDFLAGS_vmlinux-y := -Bstatic
106 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
107 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
109 ifeq ($(CONFIG_PPC64),y)
110 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
111 # -mcmodel=medium breaks modules because it uses 32bit offsets from
112 # the TOC pointer to create pointers where possible. Pointers into the
113 # percpu data area are created by this method.
115 # The kernel module loader relocates the percpu data section from the
116 # original location (starting with 0xd...) to somewhere in the base
117 # kernel percpu data space (starting with 0xc...). We need a full
118 # 64bit relocation for this to work, hence -mcmodel=large.
119 KBUILD_CFLAGS_MODULE += -mcmodel=large
121 export NO_MINIMAL_TOC := -mno-minimal-toc
125 CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
126 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
127 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
128 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
130 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
131 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
132 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
134 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
135 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
136 CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD)
138 ifeq ($(CONFIG_PPC_BOOK3S_64),y)
139 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4)
141 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
144 CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
145 CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4)
146 CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5)
147 CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6)
148 CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7)
149 CFLAGS-$(CONFIG_POWER8_CPU) += $(call cc-option,-mcpu=power8)
151 # Altivec option not allowed with e500mc64 in GCC.
152 ifeq ($(CONFIG_ALTIVEC),y)
153 E5500_CPU := -mcpu=powerpc64
155 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
157 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
158 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
160 ifeq ($(CONFIG_PPC32),y)
161 ifeq ($(CONFIG_PPC_E500MC),y)
162 CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
164 CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
168 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
170 KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr)
171 KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y)
172 KBUILD_CFLAGS += $(call cc-option,-msoft-float)
173 KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y)
174 CPP = $(CC) -E $(KBUILD_CFLAGS)
176 CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
178 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
180 ifeq ($(CONFIG_476FPE_ERR46),y)
181 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
182 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
185 # No AltiVec or VSX instructions when building kernel
186 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
187 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
189 # No SPE instruction when building kernel
190 # (We use all available options to help semi-broken compilers)
191 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
192 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
194 # Enable unit-at-a-time mode when possible. It shrinks the
195 # kernel considerably.
196 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
198 # FIXME: the module load should be taught about the additional relocs
200 # revert to pre-gcc-4.4 behaviour of .eh_frame
201 KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
203 # Never use string load/store instructions as they are
204 # often slow when they are implemented at all
205 KBUILD_CFLAGS += $(call cc-option,-mno-string)
207 ifeq ($(CONFIG_6xx),y)
208 KBUILD_CFLAGS += -mcpu=powerpc
211 # Work around a gcc code-gen bug with -fno-omit-frame-pointer.
212 ifeq ($(CONFIG_FUNCTION_TRACER),y)
213 KBUILD_CFLAGS += -mno-sched-epilog
216 cpu-as-$(CONFIG_4xx) += -Wa,-m405
217 cpu-as-$(CONFIG_ALTIVEC) += -Wa,-maltivec
218 cpu-as-$(CONFIG_E200) += -Wa,-me200
220 KBUILD_AFLAGS += $(cpu-as-y)
221 KBUILD_CFLAGS += $(cpu-as-y)
223 KBUILD_AFLAGS += $(aflags-y)
224 KBUILD_CFLAGS += $(cflags-y)
226 head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
227 head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o
228 head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
229 head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
230 head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
232 head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
233 head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
234 head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
235 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
237 core-y += arch/powerpc/kernel/ \
240 arch/powerpc/sysdev/ \
241 arch/powerpc/platforms/ \
242 arch/powerpc/math-emu/ \
243 arch/powerpc/crypto/ \
245 core-$(CONFIG_XMON) += arch/powerpc/xmon/
246 core-$(CONFIG_KVM) += arch/powerpc/kvm/
247 core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/
249 drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
251 # Default to zImage, override when needed
254 # With make 3.82 we cannot mix normal and wildcard targets
255 BOOT_TARGETS1 := zImage zImage.initrd uImage
256 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
258 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
260 boot := arch/$(ARCH)/boot
262 ifeq ($(CONFIG_RELOCATABLE),y)
263 quiet_cmd_relocs_check = CALL $<
264 cmd_relocs_check = $(CONFIG_SHELL) $< "$(OBJDUMP)" "$(obj)/vmlinux"
266 PHONY += relocs_check
267 relocs_check: arch/powerpc/relocs_check.sh vmlinux
268 $(call cmd,relocs_check)
273 $(BOOT_TARGETS1): vmlinux
274 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
275 $(BOOT_TARGETS2): vmlinux
276 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
280 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
283 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
285 # Used to create 'merged defconfigs'
286 # To use it $(call) it with the first argument as the base defconfig
287 # and the second argument as a space separated list of .config files to merge,
288 # without the .config suffix.
289 define merge_into_defconfig
290 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
291 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
292 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
293 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
296 PHONY += pseries_le_defconfig
297 pseries_le_defconfig:
298 $(call merge_into_defconfig,pseries_defconfig,le)
300 PHONY += ppc64le_defconfig
302 $(call merge_into_defconfig,ppc64_defconfig,le)
304 PHONY += mpc85xx_defconfig
306 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
307 85xx-32bit 85xx-hw fsl-emb-nonhw)
309 PHONY += mpc85xx_smp_defconfig
310 mpc85xx_smp_defconfig:
311 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
312 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
314 PHONY += corenet32_smp_defconfig
315 corenet32_smp_defconfig:
316 $(call merge_into_defconfig,corenet_basic_defconfig,\
317 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
319 PHONY += corenet64_smp_defconfig
320 corenet64_smp_defconfig:
321 $(call merge_into_defconfig,corenet_basic_defconfig,\
322 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw)
325 @echo '* zImage - Build default images selected by kernel config'
326 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
327 @echo ' uImage - U-Boot native image format'
328 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
329 @echo ' versions which do not support device trees'
330 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
331 @echo ' simpleImage.<dt> - Firmware independent image.'
332 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
333 @echo ' install - Install kernel using'
334 @echo ' (your) ~/bin/$(INSTALLKERNEL) or'
335 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
336 @echo ' install to $$(INSTALL_PATH) and run lilo'
337 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
339 @echo ' Targets with <dt> embed a device tree blob inside the image'
340 @echo ' These targets support board with firmware that does not'
341 @echo ' support passing a device tree directly. Replace <dt> with the'
342 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
343 @echo ' (minus the .dts extension).'
347 $(Q)$(MAKE) $(build)=$(boot) install
350 ifeq ($(CONFIG_PPC64),y)
351 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
354 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
358 $(Q)$(MAKE) $(clean)=$(boot)
360 archprepare: checkbin
362 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
363 # to stdout and these checks are run even on install targets.
364 TOUT := .tmp_gas_check
366 # Check gcc and binutils versions:
367 # - gcc-3.4 and binutils-2.14 are a fatal combination
368 # - Require gcc 4.0 or above on 64-bit
369 # - gcc-4.2.0 has issues compiling modules on 64-bit
371 @if test "$(cc-name)" != "clang" \
372 && test "$(cc-version)" = "0304" ; then \
373 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
374 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
375 echo 'correctly with gcc-3.4 and your version of binutils.'; \
376 echo '*** Please upgrade your binutils or downgrade your gcc'; \
380 @if test "$(cc-name)" != "clang" \
381 && test "$(cc-version)" -lt "0400" \
382 && test "x${CONFIG_PPC64}" = "xy" ; then \
383 echo -n "Sorry, GCC v4.0 or above is required to build " ; \
384 echo "the 64-bit powerpc kernel." ; \
387 @if test "$(cc-name)" != "clang" \
388 && test "$(cc-fullversion)" = "040200" \
389 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
390 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
391 echo 'kernel with modules enabled.' ; \
392 echo -n '*** Please use a different GCC version or ' ; \
393 echo 'disable kernel modules' ; \
396 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
397 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
398 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
399 echo 'in some circumstances.' ; \
400 echo -n '*** Please use a different binutils version.' ; \
405 CLEAN_FILES += $(TOUT)