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 91ifeq ($(CONFIG_PPC_BOOK3S_64),y) 92CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4) 93else 94CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 95endif 96 97CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell) 98CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4) 99CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5) 100CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6) 101CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7) 102 103E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 104CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 105CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 106 107ifeq ($(CONFIG_PPC32),y) 108ifeq ($(CONFIG_PPC_E500MC),y) 109CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc) 110else 111CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc) 112endif 113endif 114 115CFLAGS-$(CONFIG_TUNE_CELL) += $(call cc-option,-mtune=cell) 116 117KBUILD_CPPFLAGS += -Iarch/$(ARCH) 118KBUILD_AFLAGS += -Iarch/$(ARCH) 119KBUILD_CFLAGS += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y) 120CPP = $(CC) -E $(KBUILD_CFLAGS) 121 122CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__ 123 124KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 125 126# No AltiVec or VSX instructions when building kernel 127KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 128KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 129 130# No SPE instruction when building kernel 131# (We use all available options to help semi-broken compilers) 132KBUILD_CFLAGS += $(call cc-option,-mno-spe) 133KBUILD_CFLAGS += $(call cc-option,-mspe=no) 134 135# Enable unit-at-a-time mode when possible. It shrinks the 136# kernel considerably. 137KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) 138 139# FIXME: the module load should be taught about the additional relocs 140# generated by this. 141# revert to pre-gcc-4.4 behaviour of .eh_frame 142KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 143 144# Never use string load/store instructions as they are 145# often slow when they are implemented at all 146KBUILD_CFLAGS += -mno-string 147 148ifeq ($(CONFIG_6xx),y) 149KBUILD_CFLAGS += -mcpu=powerpc 150endif 151 152# Work around a gcc code-gen bug with -fno-omit-frame-pointer. 153ifeq ($(CONFIG_FUNCTION_TRACER),y) 154KBUILD_CFLAGS += -mno-sched-epilog 155endif 156 157cpu-as-$(CONFIG_4xx) += -Wa,-m405 158cpu-as-$(CONFIG_ALTIVEC) += -Wa,-maltivec 159cpu-as-$(CONFIG_E200) += -Wa,-me200 160 161KBUILD_AFLAGS += $(cpu-as-y) 162KBUILD_CFLAGS += $(cpu-as-y) 163 164head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o 165head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o 166head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 167head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 168head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 169 170head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 171head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 172head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 173head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 174 175core-y += arch/powerpc/kernel/ \ 176 arch/powerpc/mm/ \ 177 arch/powerpc/lib/ \ 178 arch/powerpc/sysdev/ \ 179 arch/powerpc/platforms/ \ 180 arch/powerpc/math-emu/ \ 181 arch/powerpc/crypto/ \ 182 arch/powerpc/net/ 183core-$(CONFIG_XMON) += arch/powerpc/xmon/ 184core-$(CONFIG_KVM) += arch/powerpc/kvm/ 185core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/ 186 187drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 188 189# Default to zImage, override when needed 190all: zImage 191 192# With make 3.82 we cannot mix normal and wildcard targets 193BOOT_TARGETS1 := zImage zImage.initrd uImage 194BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 195 196PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 197 198boot := arch/$(ARCH)/boot 199 200ifeq ($(CONFIG_RELOCATABLE),y) 201quiet_cmd_relocs_check = CALL $< 202 cmd_relocs_check = perl $< "$(OBJDUMP)" "$(obj)/vmlinux" 203 204PHONY += relocs_check 205relocs_check: arch/powerpc/relocs_check.pl vmlinux 206 $(call cmd,relocs_check) 207 208zImage: relocs_check 209endif 210 211$(BOOT_TARGETS1): vmlinux 212 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 213$(BOOT_TARGETS2): vmlinux 214 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 215 216 217bootwrapper_install: 218 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 219 220%.dtb: scripts 221 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 222 223define archhelp 224 @echo '* zImage - Build default images selected by kernel config' 225 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 226 @echo ' uImage - U-Boot native image format' 227 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 228 @echo ' versions which do not support device trees' 229 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 230 @echo ' simpleImage.<dt> - Firmware independent image.' 231 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 232 @echo ' install - Install kernel using' 233 @echo ' (your) ~/bin/$(INSTALLKERNEL) or' 234 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 235 @echo ' install to $$(INSTALL_PATH) and run lilo' 236 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 237 @echo '' 238 @echo ' Targets with <dt> embed a device tree blob inside the image' 239 @echo ' These targets support board with firmware that does not' 240 @echo ' support passing a device tree directly. Replace <dt> with the' 241 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 242 @echo ' (minus the .dts extension).' 243endef 244 245install: 246 $(Q)$(MAKE) $(build)=$(boot) install 247 248vdso_install: 249ifeq ($(CONFIG_PPC64),y) 250 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 251endif 252 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 253 254archclean: 255 $(Q)$(MAKE) $(clean)=$(boot) 256 257archprepare: checkbin 258 259# Use the file '.tmp_gas_check' for binutils tests, as gas won't output 260# to stdout and these checks are run even on install targets. 261TOUT := .tmp_gas_check 262 263# Check gcc and binutils versions: 264# - gcc-3.4 and binutils-2.14 are a fatal combination 265# - Require gcc 4.0 or above on 64-bit 266# - gcc-4.2.0 has issues compiling modules on 64-bit 267checkbin: 268 @if test "$(call cc-version)" = "0304" ; then \ 269 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \ 270 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \ 271 echo 'correctly with gcc-3.4 and your version of binutils.'; \ 272 echo '*** Please upgrade your binutils or downgrade your gcc'; \ 273 false; \ 274 fi ; \ 275 fi 276 @if test "$(call cc-version)" -lt "0400" \ 277 && test "x${CONFIG_PPC64}" = "xy" ; then \ 278 echo -n "Sorry, GCC v4.0 or above is required to build " ; \ 279 echo "the 64-bit powerpc kernel." ; \ 280 false ; \ 281 fi 282 @if test "$(call cc-fullversion)" = "040200" \ 283 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \ 284 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \ 285 echo 'kernel with modules enabled.' ; \ 286 echo -n '*** Please use a different GCC version or ' ; \ 287 echo 'disable kernel modules' ; \ 288 false ; \ 289 fi 290 291CLEAN_FILES += $(TOUT) 292 293