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 38KBUILD_DEFCONFIG := $(shell uname -m)_defconfig 39 40ifeq ($(CONFIG_PPC64),y) 41OLDARCH := ppc64 42SZ := 64 43 44new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi) 45 46ifeq ($(new_nm),y) 47NM := $(NM) --synthetic 48endif 49 50else 51OLDARCH := ppc 52SZ := 32 53endif 54 55UTS_MACHINE := $(OLDARCH) 56 57ifeq ($(HAS_BIARCH),y) 58override AS += -a$(SZ) 59override LD += -m elf$(SZ)ppc 60override CC += -m$(SZ) 61override AR := GNUTARGET=elf$(SZ)-powerpc $(AR) 62endif 63 64LDFLAGS_vmlinux := -Bstatic 65 66# The -Iarch/$(ARCH)/include is temporary while we are merging 67CPPFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH) -Iarch/$(ARCH)/include 68AFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH) 69CFLAGS-$(CONFIG_PPC64) := -mminimal-toc -mtraceback=none -mcall-aixdesc 70CFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH) -ffixed-r2 -mmultiple 71CPPFLAGS += $(CPPFLAGS-y) 72AFLAGS += $(AFLAGS-y) 73CFLAGS += -msoft-float -pipe $(CFLAGS-y) 74CPP = $(CC) -E $(CFLAGS) 75# Temporary hack until we have migrated to asm-powerpc 76LINUXINCLUDE-$(CONFIG_PPC32) := -Iarch/$(ARCH)/include 77LINUXINCLUDE += $(LINUXINCLUDE-y) 78 79CHECKFLAGS += -m$(SZ) -D__powerpc__ -D__powerpc$(SZ)__ 80 81ifeq ($(CONFIG_PPC64),y) 82GCC_BROKEN_VEC := $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi) 83 84ifeq ($(CONFIG_POWER4_ONLY),y) 85ifeq ($(CONFIG_ALTIVEC),y) 86ifeq ($(GCC_BROKEN_VEC),y) 87 CFLAGS += $(call cc-option,-mcpu=970) 88else 89 CFLAGS += $(call cc-option,-mcpu=power4) 90endif 91else 92 CFLAGS += $(call cc-option,-mcpu=power4) 93endif 94else 95 CFLAGS += $(call cc-option,-mtune=power4) 96endif 97endif 98 99# No AltiVec instruction when building kernel 100CFLAGS += $(call cc-option,-mno-altivec) 101 102# Enable unit-at-a-time mode when possible. It shrinks the 103# kernel considerably. 104CFLAGS += $(call cc-option,-funit-at-a-time) 105 106# Never use string load/store instructions as they are 107# often slow when they are implemented at all 108CFLAGS += -mno-string 109 110ifeq ($(CONFIG_6xx),y) 111CFLAGS += -mcpu=powerpc 112endif 113 114cpu-as-$(CONFIG_4xx) += -Wa,-m405 115cpu-as-$(CONFIG_6xx) += -Wa,-maltivec 116cpu-as-$(CONFIG_POWER4) += -Wa,-maltivec 117cpu-as-$(CONFIG_E500) += -Wa,-me500 118cpu-as-$(CONFIG_E200) += -Wa,-me200 119 120AFLAGS += $(cpu-as-y) 121CFLAGS += $(cpu-as-y) 122 123head-y := arch/powerpc/kernel/head_32.o 124head-$(CONFIG_PPC64) := arch/powerpc/kernel/head_64.o 125head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o 126head-$(CONFIG_4xx) := arch/powerpc/kernel/head_4xx.o 127head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 128head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 129 130head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 131head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 132 133core-y += arch/powerpc/kernel/ \ 134 arch/powerpc/mm/ \ 135 arch/powerpc/lib/ \ 136 arch/powerpc/sysdev/ \ 137 arch/powerpc/platforms/ 138core-$(CONFIG_MATH_EMULATION) += arch/powerpc/math-emu/ 139core-$(CONFIG_XMON) += arch/powerpc/xmon/ 140 141drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 142 143# Default to zImage, override when needed 144defaultimage-y := zImage 145defaultimage-$(CONFIG_PPC_ISERIES) := vmlinux 146defaultimage-$(CONFIG_DEFAULT_UIMAGE) := uImage 147KBUILD_IMAGE := $(defaultimage-y) 148all: $(KBUILD_IMAGE) 149 150CPPFLAGS_vmlinux.lds := -Upowerpc 151 152BOOT_TARGETS = zImage zImage.initrd zImage.dts zImage.dts_initrd uImage 153 154PHONY += $(BOOT_TARGETS) 155 156boot := arch/$(ARCH)/boot 157 158$(BOOT_TARGETS): vmlinux 159 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 160 161define archhelp 162 @echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 163 @echo ' install - Install kernel using' 164 @echo ' (your) ~/bin/installkernel or' 165 @echo ' (distribution) /sbin/installkernel or' 166 @echo ' install to $$(INSTALL_PATH) and run lilo' 167 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 168endef 169 170install: 171 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install 172 173archclean: 174 $(Q)$(MAKE) $(clean)=$(boot) 175 176archmrproper: 177 $(Q)rm -rf arch/$(ARCH)/include 178 179archprepare: checkbin 180 181ifeq ($(CONFIG_PPC32),y) 182# Temporary hack until we have migrated to asm-powerpc 183include/asm: arch/$(ARCH)/include/asm 184arch/$(ARCH)/include/asm: FORCE 185 $(Q)if [ ! -d arch/$(ARCH)/include ]; then mkdir -p arch/$(ARCH)/include; fi 186 $(Q)ln -fsn $(srctree)/include/asm-$(OLDARCH) arch/$(ARCH)/include/asm 187endif 188 189# Use the file '.tmp_gas_check' for binutils tests, as gas won't output 190# to stdout and these checks are run even on install targets. 191TOUT := .tmp_gas_check 192# Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec 193# instructions. 194# gcc-3.4 and binutils-2.14 are a fatal combination. 195 196checkbin: 197 @if test "$(call cc-version)" = "0304" ; then \ 198 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \ 199 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \ 200 echo 'correctly with gcc-3.4 and your version of binutils.'; \ 201 echo '*** Please upgrade your binutils or downgrade your gcc'; \ 202 false; \ 203 fi ; \ 204 fi 205 @if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \ 206 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \ 207 echo 'correctly with old versions of binutils.' ; \ 208 echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \ 209 false ; \ 210 fi 211 212CLEAN_FILES += $(TOUT) 213 214