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 KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
40 ifeq ($(CONFIG_PPC64),y)
44 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
47 NM := $(NM) --synthetic
55 UTS_MACHINE := $(OLDARCH)
57 ifeq ($(HAS_BIARCH),y)
58 override AS += -a$(SZ)
59 override LD += -m elf$(SZ)ppc
60 override CC += -m$(SZ)
61 override AR := GNUTARGET=elf$(SZ)-powerpc $(AR)
64 LDFLAGS_vmlinux := -Bstatic
66 CPPFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH)
67 AFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH)
68 CFLAGS-$(CONFIG_PPC64) := -mminimal-toc -mtraceback=none -mcall-aixdesc
69 CFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH) -ffixed-r2 -mmultiple
70 CPPFLAGS += $(CPPFLAGS-y)
72 CFLAGS += -msoft-float -pipe $(CFLAGS-y)
73 CPP = $(CC) -E $(CFLAGS)
75 CHECKFLAGS += -m$(SZ) -D__powerpc__ -D__powerpc$(SZ)__
77 ifeq ($(CONFIG_PPC64),y)
78 GCC_BROKEN_VEC := $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi)
80 ifeq ($(CONFIG_POWER4_ONLY),y)
81 ifeq ($(CONFIG_ALTIVEC),y)
82 ifeq ($(GCC_BROKEN_VEC),y)
83 CFLAGS += $(call cc-option,-mcpu=970)
85 CFLAGS += $(call cc-option,-mcpu=power4)
88 CFLAGS += $(call cc-option,-mcpu=power4)
91 CFLAGS += $(call cc-option,-mtune=power4)
95 # No AltiVec instruction when building kernel
96 CFLAGS += $(call cc-option,-mno-altivec)
98 # Enable unit-at-a-time mode when possible. It shrinks the
99 # kernel considerably.
100 CFLAGS += $(call cc-option,-funit-at-a-time)
102 # Never use string load/store instructions as they are
103 # often slow when they are implemented at all
104 CFLAGS += -mno-string
106 ifeq ($(CONFIG_6xx),y)
107 CFLAGS += -mcpu=powerpc
110 cpu-as-$(CONFIG_4xx) += -Wa,-m405
111 cpu-as-$(CONFIG_6xx) += -Wa,-maltivec
112 cpu-as-$(CONFIG_POWER4) += -Wa,-maltivec
113 cpu-as-$(CONFIG_E500) += -Wa,-me500
114 cpu-as-$(CONFIG_E200) += -Wa,-me200
116 AFLAGS += $(cpu-as-y)
117 CFLAGS += $(cpu-as-y)
119 head-y := arch/powerpc/kernel/head_32.o
120 head-$(CONFIG_PPC64) := arch/powerpc/kernel/head_64.o
121 head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o
122 head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
123 head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
124 head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
126 head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
127 head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
129 core-y += arch/powerpc/kernel/ \
132 arch/powerpc/sysdev/ \
133 arch/powerpc/platforms/
134 core-$(CONFIG_MATH_EMULATION) += arch/powerpc/math-emu/
135 core-$(CONFIG_XMON) += arch/powerpc/xmon/
137 drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
139 # Default to zImage, override when needed
140 defaultimage-y := zImage
141 defaultimage-$(CONFIG_DEFAULT_UIMAGE) := uImage
142 KBUILD_IMAGE := $(defaultimage-y)
145 CPPFLAGS_vmlinux.lds := -Upowerpc
147 BOOT_TARGETS = zImage zImage.initrd uImage
149 PHONY += $(BOOT_TARGETS)
151 boot := arch/$(ARCH)/boot
153 $(BOOT_TARGETS): vmlinux
154 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
157 @echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
158 @echo ' install - Install kernel using'
159 @echo ' (your) ~/bin/installkernel or'
160 @echo ' (distribution) /sbin/installkernel or'
161 @echo ' install to $$(INSTALL_PATH) and run lilo'
162 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
166 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install
169 $(Q)$(MAKE) $(clean)=$(boot)
171 archprepare: checkbin
173 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
174 # to stdout and these checks are run even on install targets.
175 TOUT := .tmp_gas_check
176 # Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
178 # gcc-3.4 and binutils-2.14 are a fatal combination.
181 @if test "$(call cc-version)" = "0304" ; then \
182 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
183 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
184 echo 'correctly with gcc-3.4 and your version of binutils.'; \
185 echo '*** Please upgrade your binutils or downgrade your gcc'; \
189 @if test "$(call cc-fullversion)" = "040200" \
190 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
191 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
192 echo 'kernel with modules enabled.' ; \
193 echo -n '*** Please use a different GCC version or ' ; \
194 echo 'disable kernel modules' ; \
197 @if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \
198 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \
199 echo 'correctly with old versions of binutils.' ; \
200 echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \
204 CLEAN_FILES += $(TOUT)