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)
41 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
44 NM := $(NM) --synthetic
51 # It seems there are times we use this Makefile without
52 # including the config file, but this replicates the old behaviour
53 ifeq ($(CONFIG_WORD_SIZE),)
54 CONFIG_WORD_SIZE := 32
57 UTS_MACHINE := $(OLDARCH)
59 ifeq ($(HAS_BIARCH),y)
60 override AS += -a$(CONFIG_WORD_SIZE)
61 override LD += -m elf$(CONFIG_WORD_SIZE)ppc
62 override CC += -m$(CONFIG_WORD_SIZE)
63 override AR := GNUTARGET=elf$(CONFIG_WORD_SIZE)-powerpc $(AR)
66 LDFLAGS_vmlinux-y := -Bstatic
67 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
68 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
70 ifeq ($(CONFIG_PPC64),y)
71 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
72 # -mcmodel=medium breaks modules because it uses 32bit offsets from
73 # the TOC pointer to create pointers where possible. Pointers into the
74 # percpu data area are created by this method.
76 # The kernel module loader relocates the percpu data section from the
77 # original location (starting with 0xd...) to somewhere in the base
78 # kernel percpu data space (starting with 0xc...). We need a full
79 # 64bit relocation for this to work, hence -mcmodel=large.
80 KBUILD_CFLAGS_MODULE += -mcmodel=large
82 export NO_MINIMAL_TOC := -mno-minimal-toc
86 CFLAGS-$(CONFIG_PPC64) := -mtraceback=no -mcall-aixdesc
87 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,-mminimal-toc)
88 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
89 CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 -mmultiple
91 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4)
92 CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
93 CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4)
94 CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5)
95 CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6)
96 CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7)
98 CFLAGS-$(CONFIG_TUNE_CELL) += $(call cc-option,-mtune=cell)
100 KBUILD_CPPFLAGS += -Iarch/$(ARCH)
101 KBUILD_AFLAGS += -Iarch/$(ARCH)
102 KBUILD_CFLAGS += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
103 CPP = $(CC) -E $(KBUILD_CFLAGS)
105 CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
107 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
109 # No AltiVec or VSX instructions when building kernel
110 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
111 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
113 # No SPE instruction when building kernel
114 # (We use all available options to help semi-broken compilers)
115 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
116 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
118 # Enable unit-at-a-time mode when possible. It shrinks the
119 # kernel considerably.
120 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
122 # FIXME: the module load should be taught about the additional relocs
124 # revert to pre-gcc-4.4 behaviour of .eh_frame
125 KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
127 # Never use string load/store instructions as they are
128 # often slow when they are implemented at all
129 KBUILD_CFLAGS += -mno-string
131 ifeq ($(CONFIG_6xx),y)
132 KBUILD_CFLAGS += -mcpu=powerpc
135 # Work around a gcc code-gen bug with -fno-omit-frame-pointer.
136 ifeq ($(CONFIG_FUNCTION_TRACER),y)
137 KBUILD_CFLAGS += -mno-sched-epilog
140 cpu-as-$(CONFIG_4xx) += -Wa,-m405
141 cpu-as-$(CONFIG_ALTIVEC) += -Wa,-maltivec
142 cpu-as-$(CONFIG_E500) += -Wa,-me500
143 cpu-as-$(CONFIG_E200) += -Wa,-me200
145 KBUILD_AFLAGS += $(cpu-as-y)
146 KBUILD_CFLAGS += $(cpu-as-y)
148 head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
149 head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o
150 head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
151 head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
152 head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
154 head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
155 head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
156 head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
157 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
159 core-y += arch/powerpc/kernel/ \
162 arch/powerpc/sysdev/ \
163 arch/powerpc/platforms/ \
164 arch/powerpc/math-emu/ \
165 arch/powerpc/crypto/ \
167 core-$(CONFIG_XMON) += arch/powerpc/xmon/
168 core-$(CONFIG_KVM) += arch/powerpc/kvm/
169 core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/
171 drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
173 # Default to zImage, override when needed
176 # With make 3.82 we cannot mix normal and wildcard targets
177 BOOT_TARGETS1 := zImage zImage.initrd uImage
178 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
180 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
182 boot := arch/$(ARCH)/boot
184 ifeq ($(CONFIG_RELOCATABLE),y)
185 quiet_cmd_relocs_check = CALL $<
186 cmd_relocs_check = perl $< "$(OBJDUMP)" "$(obj)/vmlinux"
188 PHONY += relocs_check
189 relocs_check: arch/powerpc/relocs_check.pl vmlinux
190 $(call cmd,relocs_check)
195 $(BOOT_TARGETS1): vmlinux
196 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
197 $(BOOT_TARGETS2): vmlinux
198 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
202 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
205 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
208 @echo '* zImage - Build default images selected by kernel config'
209 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
210 @echo ' uImage - U-Boot native image format'
211 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
212 @echo ' versions which do not support device trees'
213 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
214 @echo ' simpleImage.<dt> - Firmware independent image.'
215 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
216 @echo ' install - Install kernel using'
217 @echo ' (your) ~/bin/$(INSTALLKERNEL) or'
218 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
219 @echo ' install to $$(INSTALL_PATH) and run lilo'
220 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
222 @echo ' Targets with <dt> embed a device tree blob inside the image'
223 @echo ' These targets support board with firmware that does not'
224 @echo ' support passing a device tree directly. Replace <dt> with the'
225 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
226 @echo ' (minus the .dts extension).'
230 $(Q)$(MAKE) $(build)=$(boot) install
233 ifeq ($(CONFIG_PPC64),y)
234 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
236 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
239 $(Q)$(MAKE) $(clean)=$(boot)
241 archprepare: checkbin
243 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
244 # to stdout and these checks are run even on install targets.
245 TOUT := .tmp_gas_check
247 # Check gcc and binutils versions:
248 # - gcc-3.4 and binutils-2.14 are a fatal combination
249 # - Require gcc 4.0 or above on 64-bit
250 # - gcc-4.2.0 has issues compiling modules on 64-bit
252 @if test "$(call cc-version)" = "0304" ; then \
253 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
254 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
255 echo 'correctly with gcc-3.4 and your version of binutils.'; \
256 echo '*** Please upgrade your binutils or downgrade your gcc'; \
260 @if test "$(call cc-version)" -lt "0400" \
261 && test "x${CONFIG_PPC64}" = "xy" ; then \
262 echo -n "Sorry, GCC v4.0 or above is required to build " ; \
263 echo "the 64-bit powerpc kernel." ; \
266 @if test "$(call cc-fullversion)" = "040200" \
267 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
268 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
269 echo 'kernel with modules enabled.' ; \
270 echo -n '*** Please use a different GCC version or ' ; \
271 echo 'disable kernel modules' ; \
275 CLEAN_FILES += $(TOUT)