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 CROSS32AS := $(CROSS32_COMPILE)as
22 CROSS32LD := $(CROSS32_COMPILE)ld
23 CROSS32AR := $(CROSS32_COMPILE)ar
24 CROSS32OBJCOPY := $(CROSS32_COMPILE)objcopy
26 ifeq ($(HAS_BIARCH),y)
27 ifeq ($(CROSS32_COMPILE),)
28 CROSS32CC := $(CC) -m32
29 CROSS32AS := $(AS) -a32
30 CROSS32LD := $(LD) -m elf32ppc
31 CROSS32OBJCOPY := $(OBJCOPY)
32 CROSS32AR := GNUTARGET=elf32-powerpc $(AR)
36 export CROSS32CC CROSS32AS CROSS32LD CROSS32AR CROSS32OBJCOPY
38 ifeq ($(CROSS_COMPILE),)
39 KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
41 KBUILD_DEFCONFIG := ppc64_defconfig
44 ifeq ($(CONFIG_PPC64),y)
47 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
50 NM := $(NM) --synthetic
57 # It seems there are times we use this Makefile without
58 # including the config file, but this replicates the old behaviour
59 ifeq ($(CONFIG_WORD_SIZE),)
60 CONFIG_WORD_SIZE := 32
63 UTS_MACHINE := $(OLDARCH)
65 ifeq ($(HAS_BIARCH),y)
66 override AS += -a$(CONFIG_WORD_SIZE)
67 override LD += -m elf$(CONFIG_WORD_SIZE)ppc
68 override CC += -m$(CONFIG_WORD_SIZE)
69 override AR := GNUTARGET=elf$(CONFIG_WORD_SIZE)-powerpc $(AR)
72 LDFLAGS_vmlinux := -Bstatic
74 CPPFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH)
75 AFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH)
76 CFLAGS-$(CONFIG_PPC64) := -mminimal-toc -mtraceback=none -mcall-aixdesc
77 CFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH) -ffixed-r2 -mmultiple
78 KBUILD_CPPFLAGS += $(CPPFLAGS-y)
79 KBUILD_AFLAGS += $(AFLAGS-y)
80 KBUILD_CFLAGS += -msoft-float -pipe $(CFLAGS-y)
81 CPP = $(CC) -E $(KBUILD_CFLAGS)
83 CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
85 ifeq ($(CONFIG_PPC64),y)
86 GCC_BROKEN_VEC := $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi)
88 ifeq ($(CONFIG_POWER4_ONLY),y)
89 ifeq ($(CONFIG_ALTIVEC),y)
90 ifeq ($(GCC_BROKEN_VEC),y)
91 KBUILD_CFLAGS += $(call cc-option,-mcpu=970)
93 KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
96 KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
99 KBUILD_CFLAGS += $(call cc-option,-mtune=power4)
103 ifeq ($(CONFIG_TUNE_CELL),y)
104 KBUILD_CFLAGS += $(call cc-option,-mtune=cell)
107 # No AltiVec instruction when building kernel
108 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
110 # No SPE instruction when building kernel
111 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
113 # Enable unit-at-a-time mode when possible. It shrinks the
114 # kernel considerably.
115 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
117 # Never use string load/store instructions as they are
118 # often slow when they are implemented at all
119 KBUILD_CFLAGS += -mno-string
121 ifeq ($(CONFIG_6xx),y)
122 KBUILD_CFLAGS += -mcpu=powerpc
125 cpu-as-$(CONFIG_4xx) += -Wa,-m405
126 cpu-as-$(CONFIG_6xx) += -Wa,-maltivec
127 cpu-as-$(CONFIG_POWER4) += -Wa,-maltivec
128 cpu-as-$(CONFIG_E500) += -Wa,-me500
129 cpu-as-$(CONFIG_E200) += -Wa,-me200
131 KBUILD_AFLAGS += $(cpu-as-y)
132 KBUILD_CFLAGS += $(cpu-as-y)
134 head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
135 head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o
136 head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
137 head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
138 head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
140 head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
141 head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
143 core-y += arch/powerpc/kernel/ \
146 arch/powerpc/sysdev/ \
147 arch/powerpc/platforms/
148 core-$(CONFIG_MATH_EMULATION) += arch/powerpc/math-emu/
149 core-$(CONFIG_XMON) += arch/powerpc/xmon/
151 drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
153 # Default to zImage, override when needed
154 defaultimage-y := zImage
155 defaultimage-$(CONFIG_DEFAULT_UIMAGE) := uImage
156 KBUILD_IMAGE := $(defaultimage-y)
159 CPPFLAGS_vmlinux.lds := -Upowerpc
161 BOOT_TARGETS = zImage zImage.initrd uImage
163 PHONY += $(BOOT_TARGETS)
165 boot := arch/$(ARCH)/boot
167 $(BOOT_TARGETS): vmlinux
168 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
171 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
174 @echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
175 @echo ' install - Install kernel using'
176 @echo ' (your) ~/bin/installkernel or'
177 @echo ' (distribution) /sbin/installkernel or'
178 @echo ' install to $$(INSTALL_PATH) and run lilo'
179 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
182 install: vdso_install
183 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install
186 ifeq ($(CONFIG_PPC64),y)
187 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
189 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
192 $(Q)$(MAKE) $(clean)=$(boot)
194 archprepare: checkbin
196 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
197 # to stdout and these checks are run even on install targets.
198 TOUT := .tmp_gas_check
199 # Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
201 # gcc-3.4 and binutils-2.14 are a fatal combination.
204 @if test "$(call cc-version)" = "0304" ; then \
205 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
206 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
207 echo 'correctly with gcc-3.4 and your version of binutils.'; \
208 echo '*** Please upgrade your binutils or downgrade your gcc'; \
212 @if test "$(call cc-fullversion)" = "040200" \
213 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
214 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
215 echo 'kernel with modules enabled.' ; \
216 echo -n '*** Please use a different GCC version or ' ; \
217 echo 'disable kernel modules' ; \
220 @if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \
221 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \
222 echo 'correctly with old versions of binutils.' ; \
223 echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \
227 CLEAN_FILES += $(TOUT)