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 $(AR)
72 LDFLAGS_vmlinux := -Bstatic
74 CFLAGS-$(CONFIG_PPC64) := -mminimal-toc -mtraceback=none -mcall-aixdesc
75 CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 -mmultiple
76 KBUILD_CPPFLAGS += -Iarch/$(ARCH)
77 KBUILD_AFLAGS += -Iarch/$(ARCH)
78 KBUILD_CFLAGS += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
79 CPP = $(CC) -E $(KBUILD_CFLAGS)
81 CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
83 ifeq ($(CONFIG_PPC64),y)
84 GCC_BROKEN_VEC := $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi)
86 ifeq ($(CONFIG_POWER4_ONLY),y)
87 ifeq ($(CONFIG_ALTIVEC),y)
88 ifeq ($(GCC_BROKEN_VEC),y)
89 KBUILD_CFLAGS += $(call cc-option,-mcpu=970)
91 KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
94 KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
97 KBUILD_CFLAGS += $(call cc-option,-mtune=power4)
101 ifeq ($(CONFIG_TUNE_CELL),y)
102 KBUILD_CFLAGS += $(call cc-option,-mtune=cell)
105 # No AltiVec instruction when building kernel
106 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
108 # No SPE instruction when building kernel
109 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
111 # Enable unit-at-a-time mode when possible. It shrinks the
112 # kernel considerably.
113 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
115 # Never use string load/store instructions as they are
116 # often slow when they are implemented at all
117 KBUILD_CFLAGS += -mno-string
119 ifeq ($(CONFIG_6xx),y)
120 KBUILD_CFLAGS += -mcpu=powerpc
123 cpu-as-$(CONFIG_4xx) += -Wa,-m405
124 cpu-as-$(CONFIG_6xx) += -Wa,-maltivec
125 cpu-as-$(CONFIG_POWER4) += -Wa,-maltivec
126 cpu-as-$(CONFIG_E500) += -Wa,-me500
127 cpu-as-$(CONFIG_E200) += -Wa,-me200
129 KBUILD_AFLAGS += $(cpu-as-y)
130 KBUILD_CFLAGS += $(cpu-as-y)
132 head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
133 head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o
134 head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
135 head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
136 head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
138 head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
139 head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
141 core-y += arch/powerpc/kernel/ \
144 arch/powerpc/sysdev/ \
145 arch/powerpc/platforms/
146 core-$(CONFIG_MATH_EMULATION) += arch/powerpc/math-emu/
147 core-$(CONFIG_XMON) += arch/powerpc/xmon/
148 core-$(CONFIG_KVM) += arch/powerpc/kvm/
150 drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
152 # Default to zImage, override when needed
155 CPPFLAGS_vmlinux.lds := -Upowerpc
157 BOOT_TARGETS = zImage zImage.initrd uImage zImage% dtbImage% treeImage.% cuImage.%
159 PHONY += $(BOOT_TARGETS)
161 boot := arch/$(ARCH)/boot
163 $(BOOT_TARGETS): vmlinux
164 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
166 bootwrapper_install %.dtb:
167 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
170 @echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
171 @echo ' install - Install kernel using'
172 @echo ' (your) ~/bin/installkernel or'
173 @echo ' (distribution) /sbin/installkernel or'
174 @echo ' install to $$(INSTALL_PATH) and run lilo'
175 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
179 $(Q)$(MAKE) $(build)=$(boot) install
182 ifeq ($(CONFIG_PPC64),y)
183 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
185 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
188 $(Q)$(MAKE) $(clean)=$(boot)
190 archprepare: checkbin
192 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
193 # to stdout and these checks are run even on install targets.
194 TOUT := .tmp_gas_check
195 # Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
197 # gcc-3.4 and binutils-2.14 are a fatal combination.
200 @if test "$(call cc-version)" = "0304" ; then \
201 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
202 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
203 echo 'correctly with gcc-3.4 and your version of binutils.'; \
204 echo '*** Please upgrade your binutils or downgrade your gcc'; \
208 @if test "$(call cc-fullversion)" = "040200" \
209 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
210 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
211 echo 'kernel with modules enabled.' ; \
212 echo -n '*** Please use a different GCC version or ' ; \
213 echo 'disable kernel modules' ; \
216 @if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \
217 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \
218 echo 'correctly with old versions of binutils.' ; \
219 echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \
223 CLEAN_FILES += $(TOUT)