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 # If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use
33 # ppc64_defconfig because we have nothing better to go on.
34 uname := $(shell uname -m)
35 KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64)_defconfig
37 ifeq ($(CONFIG_PPC64),y)
38 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
41 NM := $(NM) --synthetic
45 # BITS is used as extension for files which are available in a 32 bit
46 # and a 64 bit version to simplify shared Makefiles.
47 # e.g.: obj-y += foo_$(BITS).o
57 machine-$(CONFIG_PPC64) += 64
58 machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
59 UTS_MACHINE := $(subst $(space),,$(machine-y))
61 # XXX This needs to be before we override LD below
63 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
65 ifeq ($(call ld-ifversion, -ge, 225000000, y),y)
66 # Have the linker provide sfpr if possible.
67 # There is a corresponding test in arch/powerpc/lib/Makefile
68 KBUILD_LDFLAGS_MODULE += --save-restore-funcs
70 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
74 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
77 GNUTARGET := powerpcle
78 MULTIPLEWORD := -mno-multiple
79 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
84 MULTIPLEWORD := -mmultiple
88 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
89 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc)
90 aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
91 aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2
94 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
95 cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
96 ifneq ($(cc-name),clang)
97 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
100 aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
101 aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
103 ifeq ($(HAS_BIARCH),y)
104 override AS += -a$(BITS)
105 override LD += -m elf$(BITS)$(LDEMULATION)
106 override CC += -m$(BITS)
107 KBUILD_ARFLAGS += --target=elf$(BITS)-$(GNUTARGET)
110 LDFLAGS_vmlinux-y := -Bstatic
111 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
112 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
113 LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn)
115 ifeq ($(CONFIG_PPC64),y)
116 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
117 # -mcmodel=medium breaks modules because it uses 32bit offsets from
118 # the TOC pointer to create pointers where possible. Pointers into the
119 # percpu data area are created by this method.
121 # The kernel module loader relocates the percpu data section from the
122 # original location (starting with 0xd...) to somewhere in the base
123 # kernel percpu data space (starting with 0xc...). We need a full
124 # 64bit relocation for this to work, hence -mcmodel=large.
125 KBUILD_CFLAGS_MODULE += -mcmodel=large
127 export NO_MINIMAL_TOC := -mno-minimal-toc
131 CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
132 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
133 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
134 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
136 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
137 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
138 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
140 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
141 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
142 CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD)
144 ifeq ($(CONFIG_PPC_BOOK3S_64),y)
145 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4)
146 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power4
148 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
151 ifdef CONFIG_MPROFILE_KERNEL
152 ifeq ($(shell $(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__),OK)
153 CC_FLAGS_FTRACE := -pg -mprofile-kernel
154 KBUILD_CPPFLAGS += -DCC_USING_MPROFILE_KERNEL
156 # If the user asked for mprofile-kernel but the toolchain doesn't
157 # support it, emit a warning and deliberately break the build later
158 # with mprofile-kernel-not-supported. We would prefer to make this an
159 # error right here, but then the user would never be able to run
160 # oldconfig to change their configuration.
161 $(warning Compiler does not support mprofile-kernel, set CONFIG_DISABLE_MPROFILE_KERNEL)
162 CC_FLAGS_FTRACE := -mprofile-kernel-not-supported
166 CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
167 CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4)
168 CFLAGS-$(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) += $(call cc-option,-mcpu=power8)
173 # Altivec option not allowed with e500mc64 in GCC.
174 ifeq ($(CONFIG_ALTIVEC),y)
175 E5500_CPU := -mcpu=powerpc64
177 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
179 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
180 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
182 ifeq ($(CONFIG_PPC32),y)
183 ifeq ($(CONFIG_PPC_E500MC),y)
184 CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
186 CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
190 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
192 KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr)
193 KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y)
194 KBUILD_CFLAGS += $(call cc-option,-msoft-float)
195 KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y)
196 CPP = $(CC) -E $(KBUILD_CFLAGS)
198 CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
199 ifdef CONFIG_CPU_BIG_ENDIAN
200 CHECKFLAGS += -D__BIG_ENDIAN__
202 CHECKFLAGS += -D__LITTLE_ENDIAN__
205 ifeq ($(CONFIG_476FPE_ERR46),y)
206 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
207 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
210 # No AltiVec or VSX instructions when building kernel
211 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
212 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
214 # No SPE instruction when building kernel
215 # (We use all available options to help semi-broken compilers)
216 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
217 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
219 # Enable unit-at-a-time mode when possible. It shrinks the
220 # kernel considerably.
221 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
223 # FIXME: the module load should be taught about the additional relocs
225 # revert to pre-gcc-4.4 behaviour of .eh_frame
226 KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
228 # Never use string load/store instructions as they are
229 # often slow when they are implemented at all
230 KBUILD_CFLAGS += $(call cc-option,-mno-string)
232 ifeq ($(CONFIG_6xx),y)
233 KBUILD_CFLAGS += -mcpu=powerpc
236 # Work around a gcc code-gen bug with -fno-omit-frame-pointer.
237 ifeq ($(CONFIG_FUNCTION_TRACER),y)
238 # Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8
239 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199
240 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828
241 ifneq ($(cc-name),clang)
242 KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog)
246 cpu-as-$(CONFIG_4xx) += -Wa,-m405
247 cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
248 cpu-as-$(CONFIG_E200) += -Wa,-me200
250 KBUILD_AFLAGS += $(cpu-as-y)
251 KBUILD_CFLAGS += $(cpu-as-y)
253 KBUILD_AFLAGS += $(aflags-y)
254 KBUILD_CFLAGS += $(cflags-y)
256 head-y := arch/powerpc/kernel/head_$(BITS).o
257 head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o
258 head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
259 head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
260 head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
262 head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
263 head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
264 head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
265 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
267 core-y += arch/powerpc/kernel/ \
270 arch/powerpc/sysdev/ \
271 arch/powerpc/platforms/ \
272 arch/powerpc/math-emu/ \
273 arch/powerpc/crypto/ \
275 core-$(CONFIG_XMON) += arch/powerpc/xmon/
276 core-$(CONFIG_KVM) += arch/powerpc/kvm/
277 core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/
278 core-$(CONFIG_KEXEC_FILE) += arch/powerpc/purgatory/
280 drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
282 # Default to zImage, override when needed
285 # With make 3.82 we cannot mix normal and wildcard targets
286 BOOT_TARGETS1 := zImage zImage.initrd uImage
287 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
289 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
291 boot := arch/$(ARCH)/boot
293 $(BOOT_TARGETS1): vmlinux
294 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
295 $(BOOT_TARGETS2): vmlinux
296 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
300 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
303 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
305 # Used to create 'merged defconfigs'
306 # To use it $(call) it with the first argument as the base defconfig
307 # and the second argument as a space separated list of .config files to merge,
308 # without the .config suffix.
309 define merge_into_defconfig
310 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
311 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
312 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
313 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
316 PHONY += pseries_le_defconfig
317 pseries_le_defconfig:
318 $(call merge_into_defconfig,pseries_defconfig,le)
320 PHONY += ppc64le_defconfig
322 $(call merge_into_defconfig,ppc64_defconfig,le)
324 PHONY += powernv_be_defconfig
325 powernv_be_defconfig:
326 $(call merge_into_defconfig,powernv_defconfig,be)
328 PHONY += mpc85xx_defconfig
330 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
331 85xx-32bit 85xx-hw fsl-emb-nonhw)
333 PHONY += mpc85xx_smp_defconfig
334 mpc85xx_smp_defconfig:
335 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
336 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
338 PHONY += corenet32_smp_defconfig
339 corenet32_smp_defconfig:
340 $(call merge_into_defconfig,corenet_basic_defconfig,\
341 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
343 PHONY += corenet64_smp_defconfig
344 corenet64_smp_defconfig:
345 $(call merge_into_defconfig,corenet_basic_defconfig,\
346 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
348 PHONY += mpc86xx_defconfig
350 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
351 86xx-hw fsl-emb-nonhw)
353 PHONY += mpc86xx_smp_defconfig
354 mpc86xx_smp_defconfig:
355 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
356 86xx-smp 86xx-hw fsl-emb-nonhw)
359 @echo '* zImage - Build default images selected by kernel config'
360 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
361 @echo ' uImage - U-Boot native image format'
362 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
363 @echo ' versions which do not support device trees'
364 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
365 @echo ' simpleImage.<dt> - Firmware independent image.'
366 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
367 @echo ' install - Install kernel using'
368 @echo ' (your) ~/bin/$(INSTALLKERNEL) or'
369 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
370 @echo ' install to $$(INSTALL_PATH) and run lilo'
371 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
373 @echo ' Targets with <dt> embed a device tree blob inside the image'
374 @echo ' These targets support board with firmware that does not'
375 @echo ' support passing a device tree directly. Replace <dt> with the'
376 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
377 @echo ' (minus the .dts extension).'
381 $(Q)$(MAKE) $(build)=$(boot) install
384 ifeq ($(CONFIG_PPC64),y)
385 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
388 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
392 $(Q)$(MAKE) $(clean)=$(boot)
394 archprepare: checkbin
396 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
397 # to stdout and these checks are run even on install targets.
398 TOUT := .tmp_gas_check
400 # Check toolchain versions:
401 # - gcc-4.6 is the minimum kernel-wide version so nothing required.
403 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
404 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
405 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
406 echo 'in some circumstances.' ; \
407 echo -n '*** Please use a different binutils version.' ; \
412 CLEAN_FILES += $(TOUT)