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)
69 override CC += -mlittle-endian -mno-strict-align
70 override AS += -mlittle-endian
72 override CROSS32CC += -mlittle-endian
73 override CROSS32AS += -mlittle-endian
75 GNUTARGET := powerpcle
76 MULTIPLEWORD := -mno-multiple
78 override CC += -mbig-endian
79 override AS += -mbig-endian
83 MULTIPLEWORD := -mmultiple
86 ifeq ($(HAS_BIARCH),y)
87 override AS += -a$(CONFIG_WORD_SIZE)
88 override LD += -m elf$(CONFIG_WORD_SIZE)$(LDEMULATION)
89 override CC += -m$(CONFIG_WORD_SIZE)
90 override AR := GNUTARGET=elf$(CONFIG_WORD_SIZE)-$(GNUTARGET) $(AR)
93 LDFLAGS_vmlinux-y := -Bstatic
94 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
95 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
97 ifeq ($(CONFIG_PPC64),y)
98 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
99 # -mcmodel=medium breaks modules because it uses 32bit offsets from
100 # the TOC pointer to create pointers where possible. Pointers into the
101 # percpu data area are created by this method.
103 # The kernel module loader relocates the percpu data section from the
104 # original location (starting with 0xd...) to somewhere in the base
105 # kernel percpu data space (starting with 0xc...). We need a full
106 # 64bit relocation for this to work, hence -mcmodel=large.
107 KBUILD_CFLAGS_MODULE += -mcmodel=large
109 export NO_MINIMAL_TOC := -mno-minimal-toc
113 CFLAGS-$(CONFIG_PPC64) := -mtraceback=no -mcall-aixdesc
114 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
115 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,-mminimal-toc)
116 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
117 CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD)
119 ifeq ($(CONFIG_PPC_BOOK3S_64),y)
120 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4)
122 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
125 CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
126 CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4)
127 CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5)
128 CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6)
129 CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7)
131 # Altivec option not allowed with e500mc64 in GCC.
132 ifeq ($(CONFIG_ALTIVEC),y)
133 E5500_CPU := -mcpu=powerpc64
135 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
137 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
138 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
140 ifeq ($(CONFIG_PPC32),y)
141 ifeq ($(CONFIG_PPC_E500MC),y)
142 CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
144 CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
148 CFLAGS-$(CONFIG_TUNE_CELL) += $(call cc-option,-mtune=cell)
150 KBUILD_CPPFLAGS += -Iarch/$(ARCH)
151 KBUILD_AFLAGS += -Iarch/$(ARCH)
152 KBUILD_CFLAGS += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
153 CPP = $(CC) -E $(KBUILD_CFLAGS)
155 CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
157 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
159 # No AltiVec or VSX instructions when building kernel
160 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
161 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
163 # No SPE instruction when building kernel
164 # (We use all available options to help semi-broken compilers)
165 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
166 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
168 # Enable unit-at-a-time mode when possible. It shrinks the
169 # kernel considerably.
170 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
172 # FIXME: the module load should be taught about the additional relocs
174 # revert to pre-gcc-4.4 behaviour of .eh_frame
175 KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
177 # Never use string load/store instructions as they are
178 # often slow when they are implemented at all
179 KBUILD_CFLAGS += -mno-string
181 ifeq ($(CONFIG_6xx),y)
182 KBUILD_CFLAGS += -mcpu=powerpc
185 # Work around a gcc code-gen bug with -fno-omit-frame-pointer.
186 ifeq ($(CONFIG_FUNCTION_TRACER),y)
187 KBUILD_CFLAGS += -mno-sched-epilog
190 cpu-as-$(CONFIG_4xx) += -Wa,-m405
191 cpu-as-$(CONFIG_ALTIVEC) += -Wa,-maltivec
192 cpu-as-$(CONFIG_E200) += -Wa,-me200
194 KBUILD_AFLAGS += $(cpu-as-y)
195 KBUILD_CFLAGS += $(cpu-as-y)
197 head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
198 head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o
199 head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
200 head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
201 head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
203 head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
204 head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
205 head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
206 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
208 core-y += arch/powerpc/kernel/ \
211 arch/powerpc/sysdev/ \
212 arch/powerpc/platforms/ \
213 arch/powerpc/math-emu/ \
214 arch/powerpc/crypto/ \
216 core-$(CONFIG_XMON) += arch/powerpc/xmon/
217 core-$(CONFIG_KVM) += arch/powerpc/kvm/
218 core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/
220 drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
222 # Default to zImage, override when needed
225 # With make 3.82 we cannot mix normal and wildcard targets
226 BOOT_TARGETS1 := zImage zImage.initrd uImage
227 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
229 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
231 boot := arch/$(ARCH)/boot
233 ifeq ($(CONFIG_RELOCATABLE),y)
234 quiet_cmd_relocs_check = CALL $<
235 cmd_relocs_check = perl $< "$(OBJDUMP)" "$(obj)/vmlinux"
237 PHONY += relocs_check
238 relocs_check: arch/powerpc/relocs_check.pl vmlinux
239 $(call cmd,relocs_check)
244 $(BOOT_TARGETS1): vmlinux
245 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
246 $(BOOT_TARGETS2): vmlinux
247 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
251 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
254 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
257 @echo '* zImage - Build default images selected by kernel config'
258 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
259 @echo ' uImage - U-Boot native image format'
260 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
261 @echo ' versions which do not support device trees'
262 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
263 @echo ' simpleImage.<dt> - Firmware independent image.'
264 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
265 @echo ' install - Install kernel using'
266 @echo ' (your) ~/bin/$(INSTALLKERNEL) or'
267 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
268 @echo ' install to $$(INSTALL_PATH) and run lilo'
269 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
271 @echo ' Targets with <dt> embed a device tree blob inside the image'
272 @echo ' These targets support board with firmware that does not'
273 @echo ' support passing a device tree directly. Replace <dt> with the'
274 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
275 @echo ' (minus the .dts extension).'
279 $(Q)$(MAKE) $(build)=$(boot) install
282 ifeq ($(CONFIG_PPC64),y)
283 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
285 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
288 $(Q)$(MAKE) $(clean)=$(boot)
290 archprepare: checkbin
292 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
293 # to stdout and these checks are run even on install targets.
294 TOUT := .tmp_gas_check
296 # Check gcc and binutils versions:
297 # - gcc-3.4 and binutils-2.14 are a fatal combination
298 # - Require gcc 4.0 or above on 64-bit
299 # - gcc-4.2.0 has issues compiling modules on 64-bit
301 @if test "$(call cc-version)" = "0304" ; then \
302 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
303 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
304 echo 'correctly with gcc-3.4 and your version of binutils.'; \
305 echo '*** Please upgrade your binutils or downgrade your gcc'; \
309 @if test "$(call cc-version)" -lt "0400" \
310 && test "x${CONFIG_PPC64}" = "xy" ; then \
311 echo -n "Sorry, GCC v4.0 or above is required to build " ; \
312 echo "the 64-bit powerpc kernel." ; \
315 @if test "$(call cc-fullversion)" = "040200" \
316 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
317 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
318 echo 'kernel with modules enabled.' ; \
319 echo -n '*** Please use a different GCC version or ' ; \
320 echo 'disable kernel modules' ; \
324 CLEAN_FILES += $(TOUT)