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 4# this architecture. 5# 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 8# for more details. 9# 10# Copyright (C) 1994 by Linus Torvalds 11# Changes for PPC by Gary Thomas 12# Rewritten by Cort Dougan and Paul Mackerras 13# 14 15HAS_BIARCH := $(call cc-option-yn, -m32) 16 17# Set default 32 bits cross compilers for vdso and boot wrapper 18CROSS32_COMPILE ?= 19 20CROSS32CC := $(CROSS32_COMPILE)gcc 21CROSS32AS := $(CROSS32_COMPILE)as 22CROSS32LD := $(CROSS32_COMPILE)ld 23CROSS32AR := $(CROSS32_COMPILE)ar 24CROSS32OBJCOPY := $(CROSS32_COMPILE)objcopy 25 26ifeq ($(HAS_BIARCH),y) 27ifeq ($(CROSS32_COMPILE),) 28CROSS32CC := $(CC) -m32 29CROSS32AS := $(AS) -a32 30CROSS32LD := $(LD) -m elf32ppc 31CROSS32OBJCOPY := $(OBJCOPY) 32CROSS32AR := GNUTARGET=elf32-powerpc $(AR) 33endif 34endif 35 36export CROSS32CC CROSS32AS CROSS32LD CROSS32AR CROSS32OBJCOPY 37 38ifeq ($(CROSS_COMPILE),) 39KBUILD_DEFCONFIG := $(shell uname -m)_defconfig 40else 41KBUILD_DEFCONFIG := ppc64_defconfig 42endif 43 44ifeq ($(CONFIG_PPC64),y) 45OLDARCH := ppc64 46 47new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi) 48 49ifeq ($(new_nm),y) 50NM := $(NM) --synthetic 51endif 52 53else 54OLDARCH := ppc 55endif 56 57# It seems there are times we use this Makefile without 58# including the config file, but this replicates the old behaviour 59ifeq ($(CONFIG_WORD_SIZE),) 60CONFIG_WORD_SIZE := 32 61endif 62 63UTS_MACHINE := $(OLDARCH) 64 65ifeq ($(HAS_BIARCH),y) 66override AS += -a$(CONFIG_WORD_SIZE) 67override LD += -m elf$(CONFIG_WORD_SIZE)ppc 68override CC += -m$(CONFIG_WORD_SIZE) 69override AR := GNUTARGET=elf$(CONFIG_WORD_SIZE)-powerpc $(AR) 70endif 71 72LDFLAGS_vmlinux := -Bstatic 73 74CFLAGS-$(CONFIG_PPC64) := -mminimal-toc -mtraceback=none -mcall-aixdesc 75CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 -mmultiple 76KBUILD_CPPFLAGS += -Iarch/$(ARCH) 77KBUILD_AFLAGS += -Iarch/$(ARCH) 78KBUILD_CFLAGS += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y) 79CPP = $(CC) -E $(KBUILD_CFLAGS) 80 81CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__ 82 83ifeq ($(CONFIG_PPC64),y) 84GCC_BROKEN_VEC := $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi) 85 86ifeq ($(CONFIG_POWER4_ONLY),y) 87ifeq ($(CONFIG_ALTIVEC),y) 88ifeq ($(GCC_BROKEN_VEC),y) 89 KBUILD_CFLAGS += $(call cc-option,-mcpu=970) 90else 91 KBUILD_CFLAGS += $(call cc-option,-mcpu=power4) 92endif 93else 94 KBUILD_CFLAGS += $(call cc-option,-mcpu=power4) 95endif 96else 97 KBUILD_CFLAGS += $(call cc-option,-mtune=power4) 98endif 99else 100LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 101endif 102 103ifeq ($(CONFIG_TUNE_CELL),y) 104 KBUILD_CFLAGS += $(call cc-option,-mtune=cell) 105endif 106 107# No AltiVec instruction when building kernel 108KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 109 110# No SPE instruction when building kernel 111KBUILD_CFLAGS += $(call cc-option,-mno-spe) 112 113# Enable unit-at-a-time mode when possible. It shrinks the 114# kernel considerably. 115KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) 116 117# Never use string load/store instructions as they are 118# often slow when they are implemented at all 119KBUILD_CFLAGS += -mno-string 120 121ifeq ($(CONFIG_6xx),y) 122KBUILD_CFLAGS += -mcpu=powerpc 123endif 124 125cpu-as-$(CONFIG_4xx) += -Wa,-m405 126cpu-as-$(CONFIG_6xx) += -Wa,-maltivec 127cpu-as-$(CONFIG_POWER4) += -Wa,-maltivec 128cpu-as-$(CONFIG_E500) += -Wa,-me500 129cpu-as-$(CONFIG_E200) += -Wa,-me200 130 131KBUILD_AFLAGS += $(cpu-as-y) 132KBUILD_CFLAGS += $(cpu-as-y) 133 134head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o 135head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o 136head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 137head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 138head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 139 140head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 141head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 142 143core-y += arch/powerpc/kernel/ \ 144 arch/powerpc/mm/ \ 145 arch/powerpc/lib/ \ 146 arch/powerpc/sysdev/ \ 147 arch/powerpc/platforms/ 148core-$(CONFIG_MATH_EMULATION) += arch/powerpc/math-emu/ 149core-$(CONFIG_XMON) += arch/powerpc/xmon/ 150core-$(CONFIG_KVM) += arch/powerpc/kvm/ 151 152drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 153 154# Default to zImage, override when needed 155all: zImage 156 157CPPFLAGS_vmlinux.lds := -Upowerpc 158 159BOOT_TARGETS = zImage zImage.initrd uImage zImage% dtbImage% treeImage.% cuImage.% simpleImage.% 160 161PHONY += $(BOOT_TARGETS) 162 163boot := arch/$(ARCH)/boot 164 165$(BOOT_TARGETS): vmlinux 166 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 167 168bootwrapper_install %.dtb: 169 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 170 171define archhelp 172 @echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 173 @echo ' install - Install kernel using' 174 @echo ' (your) ~/bin/installkernel or' 175 @echo ' (distribution) /sbin/installkernel or' 176 @echo ' install to $$(INSTALL_PATH) and run lilo' 177 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 178endef 179 180install: 181 $(Q)$(MAKE) $(build)=$(boot) install 182 183vdso_install: 184ifeq ($(CONFIG_PPC64),y) 185 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 186endif 187 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 188 189archclean: 190 $(Q)$(MAKE) $(clean)=$(boot) 191 192archprepare: checkbin 193 194# Use the file '.tmp_gas_check' for binutils tests, as gas won't output 195# to stdout and these checks are run even on install targets. 196TOUT := .tmp_gas_check 197# Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec 198# instructions. 199# gcc-3.4 and binutils-2.14 are a fatal combination. 200 201checkbin: 202 @if test "$(call cc-version)" = "0304" ; then \ 203 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \ 204 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \ 205 echo 'correctly with gcc-3.4 and your version of binutils.'; \ 206 echo '*** Please upgrade your binutils or downgrade your gcc'; \ 207 false; \ 208 fi ; \ 209 fi 210 @if test "$(call cc-fullversion)" = "040200" \ 211 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \ 212 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \ 213 echo 'kernel with modules enabled.' ; \ 214 echo -n '*** Please use a different GCC version or ' ; \ 215 echo 'disable kernel modules' ; \ 216 false ; \ 217 fi 218 @if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \ 219 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \ 220 echo 'correctly with old versions of binutils.' ; \ 221 echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \ 222 false ; \ 223 fi 224 225CLEAN_FILES += $(TOUT) 226 227