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 $(AR) 64endif 65 66LDFLAGS_vmlinux-y := -Bstatic 67LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 68LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 69 70ifeq ($(CONFIG_PPC64),y) 71ifeq ($(call cc-option-yn,-mcmodel=medium),y) 72 # -mcmodel=medium breaks modules because it uses 32bit offsets from 73 # the TOC pointer to create pointers where possible. Pointers into the 74 # percpu data area are created by this method. 75 # 76 # The kernel module loader relocates the percpu data section from the 77 # original location (starting with 0xd...) to somewhere in the base 78 # kernel percpu data space (starting with 0xc...). We need a full 79 # 64bit relocation for this to work, hence -mcmodel=large. 80 KBUILD_CFLAGS_MODULE += -mcmodel=large 81else 82 export NO_MINIMAL_TOC := -mno-minimal-toc 83endif 84endif 85 86CFLAGS-$(CONFIG_PPC64) := -mtraceback=no -mcall-aixdesc 87CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,-mminimal-toc) 88CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 89CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 -mmultiple 90 91CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4) 92CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell) 93CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4) 94CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5) 95CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6) 96CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7) 97 98CFLAGS-$(CONFIG_TUNE_CELL) += $(call cc-option,-mtune=cell) 99 100KBUILD_CPPFLAGS += -Iarch/$(ARCH) 101KBUILD_AFLAGS += -Iarch/$(ARCH) 102KBUILD_CFLAGS += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y) 103CPP = $(CC) -E $(KBUILD_CFLAGS) 104 105CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__ 106 107KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 108 109# No AltiVec or VSX instructions when building kernel 110KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 111KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 112 113# No SPE instruction when building kernel 114# (We use all available options to help semi-broken compilers) 115KBUILD_CFLAGS += $(call cc-option,-mno-spe) 116KBUILD_CFLAGS += $(call cc-option,-mspe=no) 117 118# Enable unit-at-a-time mode when possible. It shrinks the 119# kernel considerably. 120KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) 121 122# FIXME: the module load should be taught about the additional relocs 123# generated by this. 124# revert to pre-gcc-4.4 behaviour of .eh_frame 125KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 126 127# Never use string load/store instructions as they are 128# often slow when they are implemented at all 129KBUILD_CFLAGS += -mno-string 130 131ifeq ($(CONFIG_6xx),y) 132KBUILD_CFLAGS += -mcpu=powerpc 133endif 134 135# Work around a gcc code-gen bug with -fno-omit-frame-pointer. 136ifeq ($(CONFIG_FUNCTION_TRACER),y) 137KBUILD_CFLAGS += -mno-sched-epilog 138endif 139 140cpu-as-$(CONFIG_4xx) += -Wa,-m405 141cpu-as-$(CONFIG_ALTIVEC) += -Wa,-maltivec 142cpu-as-$(CONFIG_E500) += -Wa,-me500 143cpu-as-$(CONFIG_E200) += -Wa,-me200 144 145KBUILD_AFLAGS += $(cpu-as-y) 146KBUILD_CFLAGS += $(cpu-as-y) 147 148head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o 149head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o 150head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 151head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 152head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 153 154head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 155head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 156head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 157head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 158 159core-y += arch/powerpc/kernel/ \ 160 arch/powerpc/mm/ \ 161 arch/powerpc/lib/ \ 162 arch/powerpc/sysdev/ \ 163 arch/powerpc/platforms/ \ 164 arch/powerpc/math-emu/ \ 165 arch/powerpc/crypto/ \ 166 arch/powerpc/net/ 167core-$(CONFIG_XMON) += arch/powerpc/xmon/ 168core-$(CONFIG_KVM) += arch/powerpc/kvm/ 169core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/ 170 171drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 172 173# Default to zImage, override when needed 174all: zImage 175 176# With make 3.82 we cannot mix normal and wildcard targets 177BOOT_TARGETS1 := zImage zImage.initrd uImage 178BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 179 180PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 181 182boot := arch/$(ARCH)/boot 183 184ifeq ($(CONFIG_RELOCATABLE),y) 185quiet_cmd_relocs_check = CALL $< 186 cmd_relocs_check = perl $< "$(OBJDUMP)" "$(obj)/vmlinux" 187 188PHONY += relocs_check 189relocs_check: arch/powerpc/relocs_check.pl vmlinux 190 $(call cmd,relocs_check) 191 192zImage: relocs_check 193endif 194 195$(BOOT_TARGETS1): vmlinux 196 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 197$(BOOT_TARGETS2): vmlinux 198 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 199 200 201bootwrapper_install: 202 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 203 204%.dtb: scripts 205 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 206 207define archhelp 208 @echo '* zImage - Build default images selected by kernel config' 209 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 210 @echo ' uImage - U-Boot native image format' 211 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 212 @echo ' versions which do not support device trees' 213 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 214 @echo ' simpleImage.<dt> - Firmware independent image.' 215 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 216 @echo ' install - Install kernel using' 217 @echo ' (your) ~/bin/$(INSTALLKERNEL) or' 218 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 219 @echo ' install to $$(INSTALL_PATH) and run lilo' 220 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 221 @echo '' 222 @echo ' Targets with <dt> embed a device tree blob inside the image' 223 @echo ' These targets support board with firmware that does not' 224 @echo ' support passing a device tree directly. Replace <dt> with the' 225 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 226 @echo ' (minus the .dts extension).' 227endef 228 229install: 230 $(Q)$(MAKE) $(build)=$(boot) install 231 232vdso_install: 233ifeq ($(CONFIG_PPC64),y) 234 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 235endif 236 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 237 238archclean: 239 $(Q)$(MAKE) $(clean)=$(boot) 240 241archprepare: checkbin 242 243# Use the file '.tmp_gas_check' for binutils tests, as gas won't output 244# to stdout and these checks are run even on install targets. 245TOUT := .tmp_gas_check 246 247# Check gcc and binutils versions: 248# - gcc-3.4 and binutils-2.14 are a fatal combination 249# - Require gcc 4.0 or above on 64-bit 250# - gcc-4.2.0 has issues compiling modules on 64-bit 251checkbin: 252 @if test "$(call cc-version)" = "0304" ; then \ 253 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \ 254 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \ 255 echo 'correctly with gcc-3.4 and your version of binutils.'; \ 256 echo '*** Please upgrade your binutils or downgrade your gcc'; \ 257 false; \ 258 fi ; \ 259 fi 260 @if test "$(call cc-version)" -lt "0400" \ 261 && test "x${CONFIG_PPC64}" = "xy" ; then \ 262 echo -n "Sorry, GCC v4.0 or above is required to build " ; \ 263 echo "the 64-bit powerpc kernel." ; \ 264 false ; \ 265 fi 266 @if test "$(call cc-fullversion)" = "040200" \ 267 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \ 268 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \ 269 echo 'kernel with modules enabled.' ; \ 270 echo -n '*** Please use a different GCC version or ' ; \ 271 echo 'disable kernel modules' ; \ 272 false ; \ 273 fi 274 275CLEAN_FILES += $(TOUT) 276 277