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 21CROSS32AR := $(CROSS32_COMPILE)ar 22 23ifeq ($(HAS_BIARCH),y) 24ifeq ($(CROSS32_COMPILE),) 25CROSS32CC := $(CC) -m32 26CROSS32AR := GNUTARGET=elf32-powerpc $(AR) 27endif 28endif 29 30export CROSS32CC CROSS32AR 31 32ifeq ($(CROSS_COMPILE),) 33KBUILD_DEFCONFIG := $(shell uname -m)_defconfig 34else 35KBUILD_DEFCONFIG := ppc64_defconfig 36endif 37 38ifeq ($(CONFIG_PPC64),y) 39OLDARCH := ppc64 40 41new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi) 42 43ifeq ($(new_nm),y) 44NM := $(NM) --synthetic 45endif 46 47else 48OLDARCH := ppc 49endif 50 51# It seems there are times we use this Makefile without 52# including the config file, but this replicates the old behaviour 53ifeq ($(CONFIG_WORD_SIZE),) 54CONFIG_WORD_SIZE := 32 55endif 56 57UTS_MACHINE := $(OLDARCH) 58 59ifeq ($(HAS_BIARCH),y) 60override AS += -a$(CONFIG_WORD_SIZE) 61override LD += -m elf$(CONFIG_WORD_SIZE)ppc 62override CC += -m$(CONFIG_WORD_SIZE) 63override AR := GNUTARGET=elf$(CONFIG_WORD_SIZE)-powerpc $(AR) 64endif 65 66LDFLAGS_vmlinux-yy := -Bstatic 67LDFLAGS_vmlinux-$(CONFIG_PPC64)$(CONFIG_RELOCATABLE) := -pie 68LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-yy) 69 70CFLAGS-$(CONFIG_PPC64) := -mminimal-toc -mtraceback=none -mcall-aixdesc 71CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 -mmultiple 72KBUILD_CPPFLAGS += -Iarch/$(ARCH) 73KBUILD_AFLAGS += -Iarch/$(ARCH) 74KBUILD_CFLAGS += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y) 75CPP = $(CC) -E $(KBUILD_CFLAGS) 76 77CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__ 78 79ifeq ($(CONFIG_PPC64),y) 80GCC_BROKEN_VEC := $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi) 81 82ifeq ($(CONFIG_POWER4_ONLY),y) 83ifeq ($(CONFIG_ALTIVEC),y) 84ifeq ($(GCC_BROKEN_VEC),y) 85 KBUILD_CFLAGS += $(call cc-option,-mcpu=970) 86else 87 KBUILD_CFLAGS += $(call cc-option,-mcpu=power4) 88endif 89else 90 KBUILD_CFLAGS += $(call cc-option,-mcpu=power4) 91endif 92else 93 KBUILD_CFLAGS += $(call cc-option,-mtune=power4) 94endif 95else 96LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 97endif 98 99ifeq ($(CONFIG_TUNE_CELL),y) 100 KBUILD_CFLAGS += $(call cc-option,-mtune=cell) 101endif 102 103# No AltiVec instruction when building kernel 104KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 105 106# No SPE instruction when building kernel 107# (We use all available options to help semi-broken compilers) 108KBUILD_CFLAGS += $(call cc-option,-mno-spe) 109KBUILD_CFLAGS += $(call cc-option,-mspe=no) 110 111# Enable unit-at-a-time mode when possible. It shrinks the 112# kernel considerably. 113KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) 114 115# Never use string load/store instructions as they are 116# often slow when they are implemented at all 117KBUILD_CFLAGS += -mno-string 118 119ifeq ($(CONFIG_6xx),y) 120KBUILD_CFLAGS += -mcpu=powerpc 121endif 122 123# Work around a gcc code-gen bug with -fno-omit-frame-pointer. 124ifeq ($(CONFIG_FUNCTION_TRACER),y) 125KBUILD_CFLAGS += -mno-sched-epilog 126endif 127 128cpu-as-$(CONFIG_4xx) += -Wa,-m405 129cpu-as-$(CONFIG_6xx) += -Wa,-maltivec 130cpu-as-$(CONFIG_POWER4) += -Wa,-maltivec 131cpu-as-$(CONFIG_E500) += -Wa,-me500 132cpu-as-$(CONFIG_E200) += -Wa,-me200 133 134KBUILD_AFLAGS += $(cpu-as-y) 135KBUILD_CFLAGS += $(cpu-as-y) 136 137head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o 138head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o 139head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 140head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 141head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 142 143head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 144head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 145 146core-y += arch/powerpc/kernel/ \ 147 arch/powerpc/mm/ \ 148 arch/powerpc/lib/ \ 149 arch/powerpc/sysdev/ \ 150 arch/powerpc/platforms/ \ 151 arch/powerpc/math-emu/ 152core-$(CONFIG_XMON) += arch/powerpc/xmon/ 153core-$(CONFIG_KVM) += arch/powerpc/kvm/ 154 155drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 156 157# Default to zImage, override when needed 158all: zImage 159 160CPPFLAGS_vmlinux.lds := -Upowerpc 161 162BOOT_TARGETS = zImage zImage.initrd uImage zImage% dtbImage% treeImage.% cuImage.% simpleImage.% 163 164PHONY += $(BOOT_TARGETS) 165 166boot := arch/$(ARCH)/boot 167 168$(BOOT_TARGETS): vmlinux 169 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 170 171bootwrapper_install %.dtb: 172 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 173 174define archhelp 175 @echo '* zImage - Build default images selected by kernel config' 176 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 177 @echo ' uImage - U-Boot native image format' 178 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 179 @echo ' versions which do not support device trees' 180 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 181 @echo ' simpleImage.<dt> - Firmware independent image.' 182 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 183 @echo ' install - Install kernel using' 184 @echo ' (your) ~/bin/installkernel or' 185 @echo ' (distribution) /sbin/installkernel or' 186 @echo ' install to $$(INSTALL_PATH) and run lilo' 187 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 188 @echo '' 189 @echo ' Targets with <dt> embed a device tree blob inside the image' 190 @echo ' These targets support board with firmware that does not' 191 @echo ' support passing a device tree directly. Replace <dt> with the' 192 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 193 @echo ' (minus the .dts extension).' 194endef 195 196install: 197 $(Q)$(MAKE) $(build)=$(boot) install 198 199vdso_install: 200ifeq ($(CONFIG_PPC64),y) 201 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 202endif 203 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 204 205archclean: 206 $(Q)$(MAKE) $(clean)=$(boot) 207 208archprepare: checkbin 209 210# Use the file '.tmp_gas_check' for binutils tests, as gas won't output 211# to stdout and these checks are run even on install targets. 212TOUT := .tmp_gas_check 213# Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec 214# instructions. 215# gcc-3.4 and binutils-2.14 are a fatal combination. 216 217checkbin: 218 @if test "$(call cc-version)" = "0304" ; then \ 219 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \ 220 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \ 221 echo 'correctly with gcc-3.4 and your version of binutils.'; \ 222 echo '*** Please upgrade your binutils or downgrade your gcc'; \ 223 false; \ 224 fi ; \ 225 fi 226 @if test "$(call cc-fullversion)" = "040200" \ 227 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \ 228 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \ 229 echo 'kernel with modules enabled.' ; \ 230 echo -n '*** Please use a different GCC version or ' ; \ 231 echo 'disable kernel modules' ; \ 232 false ; \ 233 fi 234 @if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \ 235 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \ 236 echo 'correctly with old versions of binutils.' ; \ 237 echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \ 238 false ; \ 239 fi 240 241CLEAN_FILES += $(TOUT) 242 243