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)
43 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
46 NM := $(NM) --synthetic
53 # It seems there are times we use this Makefile without
54 # including the config file, but this replicates the old behaviour
55 ifeq ($(CONFIG_WORD_SIZE),)
56 CONFIG_WORD_SIZE := 32
59 UTS_MACHINE := $(OLDARCH)
61 ifeq ($(HAS_BIARCH),y)
62 override AS += -a$(CONFIG_WORD_SIZE)
63 override LD += -m elf$(CONFIG_WORD_SIZE)ppc
64 override CC += -m$(CONFIG_WORD_SIZE)
65 override AR := GNUTARGET=elf$(CONFIG_WORD_SIZE)-powerpc $(AR)
68 LDFLAGS_vmlinux := -Bstatic
70 CPPFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH)
71 AFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH)
72 CFLAGS-$(CONFIG_PPC64) := -mminimal-toc -mtraceback=none -mcall-aixdesc
73 CFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH) -ffixed-r2 -mmultiple
74 CPPFLAGS += $(CPPFLAGS-y)
76 CFLAGS += -msoft-float -pipe $(CFLAGS-y)
77 CPP = $(CC) -E $(CFLAGS)
79 CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
81 ifeq ($(CONFIG_PPC64),y)
82 GCC_BROKEN_VEC := $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi)
84 ifeq ($(CONFIG_POWER4_ONLY),y)
85 ifeq ($(CONFIG_ALTIVEC),y)
86 ifeq ($(GCC_BROKEN_VEC),y)
87 CFLAGS += $(call cc-option,-mcpu=970)
89 CFLAGS += $(call cc-option,-mcpu=power4)
92 CFLAGS += $(call cc-option,-mcpu=power4)
95 CFLAGS += $(call cc-option,-mtune=power4)
99 ifeq ($(CONFIG_TUNE_CELL),y)
100 CFLAGS += $(call cc-option,-mtune=cell)
103 # No AltiVec instruction when building kernel
104 CFLAGS += $(call cc-option,-mno-altivec)
106 # Enable unit-at-a-time mode when possible. It shrinks the
107 # kernel considerably.
108 CFLAGS += $(call cc-option,-funit-at-a-time)
110 # Never use string load/store instructions as they are
111 # often slow when they are implemented at all
112 CFLAGS += -mno-string
114 ifeq ($(CONFIG_6xx),y)
115 CFLAGS += -mcpu=powerpc
118 cpu-as-$(CONFIG_4xx) += -Wa,-m405
119 cpu-as-$(CONFIG_6xx) += -Wa,-maltivec
120 cpu-as-$(CONFIG_POWER4) += -Wa,-maltivec
121 cpu-as-$(CONFIG_E500) += -Wa,-me500
122 cpu-as-$(CONFIG_E200) += -Wa,-me200
124 AFLAGS += $(cpu-as-y)
125 CFLAGS += $(cpu-as-y)
127 head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
128 head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o
129 head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
130 head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
131 head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
133 head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
134 head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
136 core-y += arch/powerpc/kernel/ \
139 arch/powerpc/sysdev/ \
140 arch/powerpc/platforms/
141 core-$(CONFIG_MATH_EMULATION) += arch/powerpc/math-emu/
142 core-$(CONFIG_XMON) += arch/powerpc/xmon/
144 drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
146 # Default to zImage, override when needed
147 defaultimage-y := zImage
148 defaultimage-$(CONFIG_DEFAULT_UIMAGE) := uImage
149 KBUILD_IMAGE := $(defaultimage-y)
152 CPPFLAGS_vmlinux.lds := -Upowerpc
154 BOOT_TARGETS = zImage zImage.initrd uImage
156 PHONY += $(BOOT_TARGETS)
158 boot := arch/$(ARCH)/boot
160 $(BOOT_TARGETS): vmlinux
161 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
164 @echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
165 @echo ' install - Install kernel using'
166 @echo ' (your) ~/bin/installkernel or'
167 @echo ' (distribution) /sbin/installkernel or'
168 @echo ' install to $$(INSTALL_PATH) and run lilo'
169 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
172 install: vdso_install
173 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install
176 ifeq ($(CONFIG_PPC64),y)
177 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
179 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
182 $(Q)$(MAKE) $(clean)=$(boot)
184 archprepare: checkbin
186 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
187 # to stdout and these checks are run even on install targets.
188 TOUT := .tmp_gas_check
189 # Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
191 # gcc-3.4 and binutils-2.14 are a fatal combination.
194 @if test "$(call cc-version)" = "0304" ; then \
195 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
196 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
197 echo 'correctly with gcc-3.4 and your version of binutils.'; \
198 echo '*** Please upgrade your binutils or downgrade your gcc'; \
202 @if test "$(call cc-fullversion)" = "040200" \
203 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
204 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
205 echo 'kernel with modules enabled.' ; \
206 echo -n '*** Please use a different GCC version or ' ; \
207 echo 'disable kernel modules' ; \
210 @if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \
211 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \
212 echo 'correctly with old versions of binutils.' ; \
213 echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \
217 CLEAN_FILES += $(TOUT)