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 $(AR) 64endif 65 66LDFLAGS_vmlinux := -Bstatic 67 68CFLAGS-$(CONFIG_PPC64) := -mminimal-toc -mtraceback=none -mcall-aixdesc 69CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 -mmultiple 70KBUILD_CPPFLAGS += -Iarch/$(ARCH) 71KBUILD_AFLAGS += -Iarch/$(ARCH) 72KBUILD_CFLAGS += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y) 73CPP = $(CC) -E $(KBUILD_CFLAGS) 74 75CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__ 76 77ifeq ($(CONFIG_PPC64),y) 78GCC_BROKEN_VEC := $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi) 79 80ifeq ($(CONFIG_POWER4_ONLY),y) 81ifeq ($(CONFIG_ALTIVEC),y) 82ifeq ($(GCC_BROKEN_VEC),y) 83 KBUILD_CFLAGS += $(call cc-option,-mcpu=970) 84else 85 KBUILD_CFLAGS += $(call cc-option,-mcpu=power4) 86endif 87else 88 KBUILD_CFLAGS += $(call cc-option,-mcpu=power4) 89endif 90else 91 KBUILD_CFLAGS += $(call cc-option,-mtune=power4) 92endif 93else 94LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 95endif 96 97ifeq ($(CONFIG_TUNE_CELL),y) 98 KBUILD_CFLAGS += $(call cc-option,-mtune=cell) 99endif 100 101# No AltiVec instruction when building kernel 102KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 103 104# No SPE instruction when building kernel 105KBUILD_CFLAGS += $(call cc-option,-mno-spe) 106 107# Enable unit-at-a-time mode when possible. It shrinks the 108# kernel considerably. 109KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) 110 111# Never use string load/store instructions as they are 112# often slow when they are implemented at all 113KBUILD_CFLAGS += -mno-string 114 115ifeq ($(CONFIG_6xx),y) 116KBUILD_CFLAGS += -mcpu=powerpc 117endif 118 119cpu-as-$(CONFIG_4xx) += -Wa,-m405 120cpu-as-$(CONFIG_6xx) += -Wa,-maltivec 121cpu-as-$(CONFIG_POWER4) += -Wa,-maltivec 122cpu-as-$(CONFIG_E500) += -Wa,-me500 123cpu-as-$(CONFIG_E200) += -Wa,-me200 124 125KBUILD_AFLAGS += $(cpu-as-y) 126KBUILD_CFLAGS += $(cpu-as-y) 127 128head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o 129head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o 130head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 131head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 132head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 133 134head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 135head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 136 137core-y += arch/powerpc/kernel/ \ 138 arch/powerpc/mm/ \ 139 arch/powerpc/lib/ \ 140 arch/powerpc/sysdev/ \ 141 arch/powerpc/platforms/ 142core-$(CONFIG_MATH_EMULATION) += arch/powerpc/math-emu/ 143core-$(CONFIG_XMON) += arch/powerpc/xmon/ 144core-$(CONFIG_KVM) += arch/powerpc/kvm/ 145 146drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 147 148# Default to zImage, override when needed 149all: zImage 150 151CPPFLAGS_vmlinux.lds := -Upowerpc 152 153BOOT_TARGETS = zImage zImage.initrd uImage zImage% dtbImage% treeImage.% cuImage.% simpleImage.% 154 155PHONY += $(BOOT_TARGETS) 156 157boot := arch/$(ARCH)/boot 158 159$(BOOT_TARGETS): vmlinux 160 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 161 162bootwrapper_install %.dtb: 163 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 164 165define archhelp 166 @echo '* zImage - Build default images selected by kernel config' 167 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 168 @echo ' uImage - U-Boot native image format' 169 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 170 @echo ' versions which do not support device trees' 171 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 172 @echo ' simpleImage.<dt> - Firmware independent image.' 173 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 174 @echo ' install - Install kernel using' 175 @echo ' (your) ~/bin/installkernel or' 176 @echo ' (distribution) /sbin/installkernel or' 177 @echo ' install to $$(INSTALL_PATH) and run lilo' 178 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 179 @echo '' 180 @echo ' Targets with <dt> embed a device tree blob inside the image' 181 @echo ' These targets support board with firmware that does not' 182 @echo ' support passing a device tree directly. Replace <dt> with the' 183 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 184 @echo ' (minus the .dts extension).' 185endef 186 187install: 188 $(Q)$(MAKE) $(build)=$(boot) install 189 190vdso_install: 191ifeq ($(CONFIG_PPC64),y) 192 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 193endif 194 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 195 196archclean: 197 $(Q)$(MAKE) $(clean)=$(boot) 198 199archprepare: checkbin 200 201# Use the file '.tmp_gas_check' for binutils tests, as gas won't output 202# to stdout and these checks are run even on install targets. 203TOUT := .tmp_gas_check 204# Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec 205# instructions. 206# gcc-3.4 and binutils-2.14 are a fatal combination. 207 208checkbin: 209 @if test "$(call cc-version)" = "0304" ; then \ 210 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \ 211 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \ 212 echo 'correctly with gcc-3.4 and your version of binutils.'; \ 213 echo '*** Please upgrade your binutils or downgrade your gcc'; \ 214 false; \ 215 fi ; \ 216 fi 217 @if test "$(call cc-fullversion)" = "040200" \ 218 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \ 219 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \ 220 echo 'kernel with modules enabled.' ; \ 221 echo -n '*** Please use a different GCC version or ' ; \ 222 echo 'disable kernel modules' ; \ 223 false ; \ 224 fi 225 @if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \ 226 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \ 227 echo 'correctly with old versions of binutils.' ; \ 228 echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \ 229 false ; \ 230 fi 231 232CLEAN_FILES += $(TOUT) 233 234