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 := $(shell uname -m)_defconfig
36 KBUILD_DEFCONFIG := ppc64_defconfig
39 ifeq ($(CONFIG_PPC64),y)
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 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
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 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 += $(call ld-option,--orphan-handling=warn)
120 ifeq ($(CONFIG_PPC64),y)
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) := $(call cc-option,-mtraceback=no)
137 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
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) += $(call cc-option,-mno-readonly-in-sdata)
151 ifeq ($(CONFIG_PPC_BOOK3S_64),y)
152 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
153 CFLAGS-$(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_CELL_CPU) += $(call cc-option,-mcpu=cell)
168 CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5)
169 CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6)
170 CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7)
171 CFLAGS-$(CONFIG_POWER8_CPU) += $(call cc-option,-mcpu=power8)
172 CFLAGS-$(CONFIG_POWER9_CPU) += $(call cc-option,-mcpu=power9)
173 CFLAGS-$(CONFIG_PPC_8xx) += $(call cc-option,-mcpu=860)
175 # Altivec option not allowed with e500mc64 in GCC.
176 ifeq ($(CONFIG_ALTIVEC),y)
177 E5500_CPU := -mcpu=powerpc64
179 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
181 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
182 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
184 ifeq ($(CONFIG_PPC32),y)
185 ifeq ($(CONFIG_PPC_E500MC),y)
186 CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
188 CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
192 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
194 KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr)
195 KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y)
196 KBUILD_CFLAGS += $(call cc-option,-msoft-float)
197 KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y)
198 CPP = $(CC) -E $(KBUILD_CFLAGS)
200 CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
201 ifdef CONFIG_CPU_BIG_ENDIAN
202 CHECKFLAGS += -D__BIG_ENDIAN__
204 CHECKFLAGS += -D__LITTLE_ENDIAN__
207 ifeq ($(CONFIG_476FPE_ERR46),y)
208 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
209 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
212 # No AltiVec or VSX instructions when building kernel
213 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
214 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
216 # No SPE instruction when building kernel
217 # (We use all available options to help semi-broken compilers)
218 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
219 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
221 # Enable unit-at-a-time mode when possible. It shrinks the
222 # kernel considerably.
223 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
225 # FIXME: the module load should be taught about the additional relocs
227 # revert to pre-gcc-4.4 behaviour of .eh_frame
228 KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
230 # Never use string load/store instructions as they are
231 # often slow when they are implemented at all
232 KBUILD_CFLAGS += $(call cc-option,-mno-string)
234 ifeq ($(CONFIG_6xx),y)
235 KBUILD_CFLAGS += -mcpu=powerpc
238 # Work around a gcc code-gen bug with -fno-omit-frame-pointer.
239 ifeq ($(CONFIG_FUNCTION_TRACER),y)
240 KBUILD_CFLAGS += -mno-sched-epilog
243 cpu-as-$(CONFIG_4xx) += -Wa,-m405
244 cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
245 cpu-as-$(CONFIG_E200) += -Wa,-me200
246 cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4
248 KBUILD_AFLAGS += $(cpu-as-y)
249 KBUILD_CFLAGS += $(cpu-as-y)
251 KBUILD_AFLAGS += $(aflags-y)
252 KBUILD_CFLAGS += $(cflags-y)
254 head-y := arch/powerpc/kernel/head_$(BITS).o
255 head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o
256 head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
257 head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
258 head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
260 head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
261 head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
262 head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
263 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
265 core-y += arch/powerpc/kernel/ \
268 arch/powerpc/sysdev/ \
269 arch/powerpc/platforms/ \
270 arch/powerpc/math-emu/ \
271 arch/powerpc/crypto/ \
273 core-$(CONFIG_XMON) += arch/powerpc/xmon/
274 core-$(CONFIG_KVM) += arch/powerpc/kvm/
275 core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/
276 core-$(CONFIG_KEXEC_FILE) += arch/powerpc/purgatory/
278 drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
280 # Default to zImage, override when needed
283 # With make 3.82 we cannot mix normal and wildcard targets
284 BOOT_TARGETS1 := zImage zImage.initrd uImage
285 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
287 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
289 boot := arch/$(ARCH)/boot
291 $(BOOT_TARGETS1): vmlinux
292 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
293 $(BOOT_TARGETS2): vmlinux
294 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
298 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
301 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
303 # Used to create 'merged defconfigs'
304 # To use it $(call) it with the first argument as the base defconfig
305 # and the second argument as a space separated list of .config files to merge,
306 # without the .config suffix.
307 define merge_into_defconfig
308 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
309 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
310 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
311 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
314 PHONY += pseries_le_defconfig
315 pseries_le_defconfig:
316 $(call merge_into_defconfig,pseries_defconfig,le)
318 PHONY += ppc64le_defconfig
320 $(call merge_into_defconfig,ppc64_defconfig,le)
322 PHONY += powernv_be_defconfig
323 powernv_be_defconfig:
324 $(call merge_into_defconfig,powernv_defconfig,be)
326 PHONY += mpc85xx_defconfig
328 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
329 85xx-32bit 85xx-hw fsl-emb-nonhw)
331 PHONY += mpc85xx_smp_defconfig
332 mpc85xx_smp_defconfig:
333 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
334 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
336 PHONY += corenet32_smp_defconfig
337 corenet32_smp_defconfig:
338 $(call merge_into_defconfig,corenet_basic_defconfig,\
339 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
341 PHONY += corenet64_smp_defconfig
342 corenet64_smp_defconfig:
343 $(call merge_into_defconfig,corenet_basic_defconfig,\
344 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
346 PHONY += mpc86xx_defconfig
348 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
349 86xx-hw fsl-emb-nonhw)
351 PHONY += mpc86xx_smp_defconfig
352 mpc86xx_smp_defconfig:
353 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
354 86xx-smp 86xx-hw fsl-emb-nonhw)
357 @echo '* zImage - Build default images selected by kernel config'
358 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
359 @echo ' uImage - U-Boot native image format'
360 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
361 @echo ' versions which do not support device trees'
362 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
363 @echo ' simpleImage.<dt> - Firmware independent image.'
364 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
365 @echo ' install - Install kernel using'
366 @echo ' (your) ~/bin/$(INSTALLKERNEL) or'
367 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
368 @echo ' install to $$(INSTALL_PATH) and run lilo'
369 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
371 @echo ' Targets with <dt> embed a device tree blob inside the image'
372 @echo ' These targets support board with firmware that does not'
373 @echo ' support passing a device tree directly. Replace <dt> with the'
374 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
375 @echo ' (minus the .dts extension).'
379 $(Q)$(MAKE) $(build)=$(boot) install
382 ifeq ($(CONFIG_PPC64),y)
383 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
385 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
388 $(Q)$(MAKE) $(clean)=$(boot)
390 archprepare: checkbin
392 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
393 # to stdout and these checks are run even on install targets.
394 TOUT := .tmp_gas_check
396 # Check gcc and binutils versions:
397 # - gcc-3.4 and binutils-2.14 are a fatal combination
398 # - Require gcc 4.0 or above on 64-bit
399 # - gcc-4.2.0 has issues compiling modules on 64-bit
401 @if test "$(cc-name)" != "clang" \
402 && test "$(cc-version)" = "0304" ; then \
403 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
404 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
405 echo 'correctly with gcc-3.4 and your version of binutils.'; \
406 echo '*** Please upgrade your binutils or downgrade your gcc'; \
410 @if test "$(cc-name)" != "clang" \
411 && test "$(cc-version)" -lt "0400" \
412 && test "x${CONFIG_PPC64}" = "xy" ; then \
413 echo -n "Sorry, GCC v4.0 or above is required to build " ; \
414 echo "the 64-bit powerpc kernel." ; \
417 @if test "$(cc-name)" != "clang" \
418 && test "$(cc-fullversion)" = "040200" \
419 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
420 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
421 echo 'kernel with modules enabled.' ; \
422 echo -n '*** Please use a different GCC version or ' ; \
423 echo 'disable kernel modules' ; \
426 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
427 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
428 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
429 echo 'in some circumstances.' ; \
430 echo -n '*** Please use a different binutils version.' ; \
435 CLEAN_FILES += $(TOUT)