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 := $(CC) -m32
26 KBUILD_ARFLAGS += --target=elf32-powerpc
30 export CROSS32CC CROSS32AR
32 ifeq ($(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 := $(NM) --synthetic
46 # BITS is used as extension for files which are available in a 32 bit
47 # and a 64 bit version to simplify shared Makefiles.
48 # e.g.: obj-y += foo_$(BITS).o
58 machine-$(CONFIG_PPC64) += 64
59 machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
60 UTS_MACHINE := $(subst $(space),,$(machine-y))
62 # XXX This needs to be before we override LD below
64 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
66 KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/powerpc/kernel/module.lds
67 ifeq ($(call ld-ifversion, -ge, 225000000, y),y)
68 # Have the linker provide sfpr if possible.
69 # There is a corresponding test in arch/powerpc/lib/Makefile
70 KBUILD_LDFLAGS_MODULE += --save-restore-funcs
72 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
76 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
79 GNUTARGET := powerpcle
80 MULTIPLEWORD := -mno-multiple
81 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
86 MULTIPLEWORD := -mmultiple
90 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
91 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc)
92 aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
93 aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2
96 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
97 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
98 ifneq ($(cc-name),clang)
99 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
102 aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
103 aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
105 ifeq ($(HAS_BIARCH),y)
106 override AS += -a$(BITS)
107 override LD += -m elf$(BITS)$(LDEMULATION)
108 override CC += -m$(BITS)
109 KBUILD_ARFLAGS += --target=elf$(BITS)-$(GNUTARGET)
112 LDFLAGS_vmlinux-y := -Bstatic
113 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
114 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
115 LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn)
117 ifeq ($(CONFIG_PPC64),y)
118 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
119 # -mcmodel=medium breaks modules because it uses 32bit offsets from
120 # the TOC pointer to create pointers where possible. Pointers into the
121 # percpu data area are created by this method.
123 # The kernel module loader relocates the percpu data section from the
124 # original location (starting with 0xd...) to somewhere in the base
125 # kernel percpu data space (starting with 0xc...). We need a full
126 # 64bit relocation for this to work, hence -mcmodel=large.
127 KBUILD_CFLAGS_MODULE += -mcmodel=large
129 export NO_MINIMAL_TOC := -mno-minimal-toc
133 CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
134 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
135 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
136 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
138 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
139 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
140 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
142 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
143 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
145 CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD)
146 CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
148 ifeq ($(CONFIG_PPC_BOOK3S_64),y)
149 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
150 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
152 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
155 ifdef CONFIG_MPROFILE_KERNEL
156 ifeq ($(shell $(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__),OK)
157 CC_FLAGS_FTRACE := -pg -mprofile-kernel
158 KBUILD_CPPFLAGS += -DCC_USING_MPROFILE_KERNEL
160 # If the user asked for mprofile-kernel but the toolchain doesn't
161 # support it, emit a warning and deliberately break the build later
162 # with mprofile-kernel-not-supported. We would prefer to make this an
163 # error right here, but then the user would never be able to run
164 # oldconfig to change their configuration.
165 $(warning Compiler does not support mprofile-kernel, set CONFIG_DISABLE_MPROFILE_KERNEL)
166 CC_FLAGS_FTRACE := -mprofile-kernel-not-supported
170 CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
171 CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5)
172 CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6)
173 CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7)
174 CFLAGS-$(CONFIG_POWER8_CPU) += $(call cc-option,-mcpu=power8)
176 # Altivec option not allowed with e500mc64 in GCC.
177 ifeq ($(CONFIG_ALTIVEC),y)
178 E5500_CPU := -mcpu=powerpc64
180 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
182 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
183 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
185 ifeq ($(CONFIG_PPC32),y)
186 ifeq ($(CONFIG_PPC_E500MC),y)
187 CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
189 CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
193 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
195 KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr)
196 KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y)
197 KBUILD_CFLAGS += $(call cc-option,-msoft-float)
198 KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y)
199 CPP = $(CC) -E $(KBUILD_CFLAGS)
201 CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
202 ifdef CONFIG_CPU_BIG_ENDIAN
203 CHECKFLAGS += -D__BIG_ENDIAN__
205 CHECKFLAGS += -D__LITTLE_ENDIAN__
208 ifeq ($(CONFIG_476FPE_ERR46),y)
209 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
210 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
213 # No AltiVec or VSX instructions when building kernel
214 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
215 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
217 # No SPE instruction when building kernel
218 # (We use all available options to help semi-broken compilers)
219 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
220 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
222 # Enable unit-at-a-time mode when possible. It shrinks the
223 # kernel considerably.
224 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
226 # FIXME: the module load should be taught about the additional relocs
228 # revert to pre-gcc-4.4 behaviour of .eh_frame
229 KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
231 # Never use string load/store instructions as they are
232 # often slow when they are implemented at all
233 KBUILD_CFLAGS += $(call cc-option,-mno-string)
235 ifeq ($(CONFIG_6xx),y)
236 KBUILD_CFLAGS += -mcpu=powerpc
239 # Work around a gcc code-gen bug with -fno-omit-frame-pointer.
240 ifeq ($(CONFIG_FUNCTION_TRACER),y)
241 KBUILD_CFLAGS += -mno-sched-epilog
244 cpu-as-$(CONFIG_4xx) += -Wa,-m405
245 cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
246 cpu-as-$(CONFIG_E200) += -Wa,-me200
247 cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4
249 KBUILD_AFLAGS += $(cpu-as-y)
250 KBUILD_CFLAGS += $(cpu-as-y)
252 KBUILD_AFLAGS += $(aflags-y)
253 KBUILD_CFLAGS += $(cflags-y)
255 head-y := arch/powerpc/kernel/head_$(BITS).o
256 head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o
257 head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
258 head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
259 head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
261 head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
262 head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
263 head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
264 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
266 core-y += arch/powerpc/kernel/ \
269 arch/powerpc/sysdev/ \
270 arch/powerpc/platforms/ \
271 arch/powerpc/math-emu/ \
272 arch/powerpc/crypto/ \
274 core-$(CONFIG_XMON) += arch/powerpc/xmon/
275 core-$(CONFIG_KVM) += arch/powerpc/kvm/
276 core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/
277 core-$(CONFIG_KEXEC_FILE) += arch/powerpc/purgatory/
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)/%,$@)
302 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
304 # Used to create 'merged defconfigs'
305 # To use it $(call) it with the first argument as the base defconfig
306 # and the second argument as a space separated list of .config files to merge,
307 # without the .config suffix.
308 define merge_into_defconfig
309 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
310 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
311 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
312 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
315 PHONY += pseries_le_defconfig
316 pseries_le_defconfig:
317 $(call merge_into_defconfig,pseries_defconfig,le)
319 PHONY += ppc64le_defconfig
321 $(call merge_into_defconfig,ppc64_defconfig,le)
323 PHONY += powernv_be_defconfig
324 powernv_be_defconfig:
325 $(call merge_into_defconfig,powernv_defconfig,be)
327 PHONY += mpc85xx_defconfig
329 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
330 85xx-32bit 85xx-hw fsl-emb-nonhw)
332 PHONY += mpc85xx_smp_defconfig
333 mpc85xx_smp_defconfig:
334 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
335 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
337 PHONY += corenet32_smp_defconfig
338 corenet32_smp_defconfig:
339 $(call merge_into_defconfig,corenet_basic_defconfig,\
340 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
342 PHONY += corenet64_smp_defconfig
343 corenet64_smp_defconfig:
344 $(call merge_into_defconfig,corenet_basic_defconfig,\
345 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
347 PHONY += mpc86xx_defconfig
349 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
350 86xx-hw fsl-emb-nonhw)
352 PHONY += mpc86xx_smp_defconfig
353 mpc86xx_smp_defconfig:
354 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
355 86xx-smp 86xx-hw fsl-emb-nonhw)
358 @echo '* zImage - Build default images selected by kernel config'
359 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
360 @echo ' uImage - U-Boot native image format'
361 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
362 @echo ' versions which do not support device trees'
363 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
364 @echo ' simpleImage.<dt> - Firmware independent image.'
365 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
366 @echo ' install - Install kernel using'
367 @echo ' (your) ~/bin/$(INSTALLKERNEL) or'
368 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
369 @echo ' install to $$(INSTALL_PATH) and run lilo'
370 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
372 @echo ' Targets with <dt> embed a device tree blob inside the image'
373 @echo ' These targets support board with firmware that does not'
374 @echo ' support passing a device tree directly. Replace <dt> with the'
375 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
376 @echo ' (minus the .dts extension).'
380 $(Q)$(MAKE) $(build)=$(boot) install
383 ifeq ($(CONFIG_PPC64),y)
384 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
386 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
389 $(Q)$(MAKE) $(clean)=$(boot)
391 archprepare: checkbin
393 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
394 # to stdout and these checks are run even on install targets.
395 TOUT := .tmp_gas_check
397 # Check gcc and binutils versions:
398 # - gcc-3.4 and binutils-2.14 are a fatal combination
399 # - Require gcc 4.0 or above on 64-bit
400 # - gcc-4.2.0 has issues compiling modules on 64-bit
402 @if test "$(cc-name)" != "clang" \
403 && test "$(cc-version)" = "0304" ; then \
404 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
405 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
406 echo 'correctly with gcc-3.4 and your version of binutils.'; \
407 echo '*** Please upgrade your binutils or downgrade your gcc'; \
411 @if test "$(cc-name)" != "clang" \
412 && test "$(cc-version)" -lt "0400" \
413 && test "x${CONFIG_PPC64}" = "xy" ; then \
414 echo -n "Sorry, GCC v4.0 or above is required to build " ; \
415 echo "the 64-bit powerpc kernel." ; \
418 @if test "$(cc-name)" != "clang" \
419 && test "$(cc-fullversion)" = "040200" \
420 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
421 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
422 echo 'kernel with modules enabled.' ; \
423 echo -n '*** Please use a different GCC version or ' ; \
424 echo 'disable kernel modules' ; \
427 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
428 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
429 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
430 echo 'in some circumstances.' ; \
431 echo -n '*** Please use a different binutils version.' ; \
436 CLEAN_FILES += $(TOUT)