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 := $(OLDARCH)
68 ifeq ($(HAS_BIARCH),y)
69 override AS += -a$(CONFIG_WORD_SIZE)
70 override LD += -m elf$(CONFIG_WORD_SIZE)ppc
71 override CC += -m$(CONFIG_WORD_SIZE)
72 override AR := GNUTARGET=elf$(CONFIG_WORD_SIZE)-powerpc $(AR)
75 LDFLAGS_vmlinux-y := -Bstatic
76 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
77 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
79 ifeq ($(CONFIG_PPC64),y)
80 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
81 # -mcmodel=medium breaks modules because it uses 32bit offsets from
82 # the TOC pointer to create pointers where possible. Pointers into the
83 # percpu data area are created by this method.
85 # The kernel module loader relocates the percpu data section from the
86 # original location (starting with 0xd...) to somewhere in the base
87 # kernel percpu data space (starting with 0xc...). We need a full
88 # 64bit relocation for this to work, hence -mcmodel=large.
89 KBUILD_CFLAGS_MODULE += -mcmodel=large
91 export NO_MINIMAL_TOC := -mno-minimal-toc
95 CFLAGS-$(CONFIG_PPC64) := -mtraceback=no -mcall-aixdesc
96 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,-mminimal-toc)
97 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
98 CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 -mmultiple
100 ifeq ($(CONFIG_PPC_BOOK3S_64),y)
101 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4)
103 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
106 CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
107 CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4)
108 CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5)
109 CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6)
110 CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7)
112 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
113 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
114 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
116 ifeq ($(CONFIG_PPC32),y)
117 ifeq ($(CONFIG_PPC_E500MC),y)
118 CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
120 CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
124 CFLAGS-$(CONFIG_TUNE_CELL) += $(call cc-option,-mtune=cell)
126 KBUILD_CPPFLAGS += -Iarch/$(ARCH)
127 KBUILD_AFLAGS += -Iarch/$(ARCH)
128 KBUILD_CFLAGS += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
129 CPP = $(CC) -E $(KBUILD_CFLAGS)
131 CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
133 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
135 # No AltiVec or VSX instructions when building kernel
136 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
137 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
139 # No SPE instruction when building kernel
140 # (We use all available options to help semi-broken compilers)
141 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
142 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
144 # Enable unit-at-a-time mode when possible. It shrinks the
145 # kernel considerably.
146 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
148 # FIXME: the module load should be taught about the additional relocs
150 # revert to pre-gcc-4.4 behaviour of .eh_frame
151 KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
153 # Never use string load/store instructions as they are
154 # often slow when they are implemented at all
155 KBUILD_CFLAGS += -mno-string
157 ifeq ($(CONFIG_6xx),y)
158 KBUILD_CFLAGS += -mcpu=powerpc
161 # Work around a gcc code-gen bug with -fno-omit-frame-pointer.
162 ifeq ($(CONFIG_FUNCTION_TRACER),y)
163 KBUILD_CFLAGS += -mno-sched-epilog
166 cpu-as-$(CONFIG_4xx) += -Wa,-m405
167 cpu-as-$(CONFIG_ALTIVEC) += -Wa,-maltivec
168 cpu-as-$(CONFIG_E200) += -Wa,-me200
170 KBUILD_AFLAGS += $(cpu-as-y)
171 KBUILD_CFLAGS += $(cpu-as-y)
173 head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
174 head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o
175 head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
176 head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
177 head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
179 head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
180 head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
181 head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
182 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
184 core-y += arch/powerpc/kernel/ \
187 arch/powerpc/sysdev/ \
188 arch/powerpc/platforms/ \
189 arch/powerpc/math-emu/ \
190 arch/powerpc/crypto/ \
192 core-$(CONFIG_XMON) += arch/powerpc/xmon/
193 core-$(CONFIG_KVM) += arch/powerpc/kvm/
194 core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/
196 drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
198 # Default to zImage, override when needed
201 # With make 3.82 we cannot mix normal and wildcard targets
202 BOOT_TARGETS1 := zImage zImage.initrd uImage
203 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
205 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
207 boot := arch/$(ARCH)/boot
209 ifeq ($(CONFIG_RELOCATABLE),y)
210 quiet_cmd_relocs_check = CALL $<
211 cmd_relocs_check = perl $< "$(OBJDUMP)" "$(obj)/vmlinux"
213 PHONY += relocs_check
214 relocs_check: arch/powerpc/relocs_check.pl vmlinux
215 $(call cmd,relocs_check)
220 $(BOOT_TARGETS1): vmlinux
221 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
222 $(BOOT_TARGETS2): vmlinux
223 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
227 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
230 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
233 @echo '* zImage - Build default images selected by kernel config'
234 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
235 @echo ' uImage - U-Boot native image format'
236 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
237 @echo ' versions which do not support device trees'
238 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
239 @echo ' simpleImage.<dt> - Firmware independent image.'
240 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
241 @echo ' install - Install kernel using'
242 @echo ' (your) ~/bin/$(INSTALLKERNEL) or'
243 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
244 @echo ' install to $$(INSTALL_PATH) and run lilo'
245 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
247 @echo ' Targets with <dt> embed a device tree blob inside the image'
248 @echo ' These targets support board with firmware that does not'
249 @echo ' support passing a device tree directly. Replace <dt> with the'
250 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
251 @echo ' (minus the .dts extension).'
255 $(Q)$(MAKE) $(build)=$(boot) install
258 ifeq ($(CONFIG_PPC64),y)
259 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
261 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
264 $(Q)$(MAKE) $(clean)=$(boot)
266 archprepare: checkbin
268 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
269 # to stdout and these checks are run even on install targets.
270 TOUT := .tmp_gas_check
272 # Check gcc and binutils versions:
273 # - gcc-3.4 and binutils-2.14 are a fatal combination
274 # - Require gcc 4.0 or above on 64-bit
275 # - gcc-4.2.0 has issues compiling modules on 64-bit
277 @if test "$(call cc-version)" = "0304" ; then \
278 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
279 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
280 echo 'correctly with gcc-3.4 and your version of binutils.'; \
281 echo '*** Please upgrade your binutils or downgrade your gcc'; \
285 @if test "$(call cc-version)" -lt "0400" \
286 && test "x${CONFIG_PPC64}" = "xy" ; then \
287 echo -n "Sorry, GCC v4.0 or above is required to build " ; \
288 echo "the 64-bit powerpc kernel." ; \
291 @if test "$(call cc-fullversion)" = "040200" \
292 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
293 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
294 echo 'kernel with modules enabled.' ; \
295 echo -n '*** Please use a different GCC version or ' ; \
296 echo 'disable kernel modules' ; \
300 CLEAN_FILES += $(TOUT)