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) 39new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi) 40 41ifeq ($(new_nm),y) 42NM := $(NM) --synthetic 43endif 44endif 45 46ifeq ($(CONFIG_PPC64),y) 47ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) 48OLDARCH := ppc64le 49else 50OLDARCH := ppc64 51endif 52else 53ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) 54OLDARCH := ppcle 55else 56OLDARCH := ppc 57endif 58endif 59 60# It seems there are times we use this Makefile without 61# including the config file, but this replicates the old behaviour 62ifeq ($(CONFIG_WORD_SIZE),) 63CONFIG_WORD_SIZE := 32 64endif 65 66UTS_MACHINE := $(OLDARCH) 67 68ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) 69override CC += -mlittle-endian -mno-strict-align 70override AS += -mlittle-endian 71override LD += -EL 72override CROSS32CC += -mlittle-endian 73override CROSS32AS += -mlittle-endian 74LDEMULATION := lppc 75GNUTARGET := powerpcle 76MULTIPLEWORD := -mno-multiple 77KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect) 78else 79ifeq ($(call cc-option-yn,-mbig-endian),y) 80override CC += -mbig-endian 81override AS += -mbig-endian 82endif 83override LD += -EB 84LDEMULATION := ppc 85GNUTARGET := powerpc 86MULTIPLEWORD := -mmultiple 87endif 88 89ifeq ($(HAS_BIARCH),y) 90override AS += -a$(CONFIG_WORD_SIZE) 91override LD += -m elf$(CONFIG_WORD_SIZE)$(LDEMULATION) 92override CC += -m$(CONFIG_WORD_SIZE) 93override AR := GNUTARGET=elf$(CONFIG_WORD_SIZE)-$(GNUTARGET) $(AR) 94endif 95 96LDFLAGS_vmlinux-y := -Bstatic 97LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 98LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 99 100ifeq ($(CONFIG_PPC64),y) 101ifeq ($(call cc-option-yn,-mcmodel=medium),y) 102 # -mcmodel=medium breaks modules because it uses 32bit offsets from 103 # the TOC pointer to create pointers where possible. Pointers into the 104 # percpu data area are created by this method. 105 # 106 # The kernel module loader relocates the percpu data section from the 107 # original location (starting with 0xd...) to somewhere in the base 108 # kernel percpu data space (starting with 0xc...). We need a full 109 # 64bit relocation for this to work, hence -mcmodel=large. 110 KBUILD_CFLAGS_MODULE += -mcmodel=large 111else 112 export NO_MINIMAL_TOC := -mno-minimal-toc 113endif 114endif 115 116CFLAGS-$(CONFIG_PPC64) := -mtraceback=no 117ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) 118CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,-mcall-aixdesc) 119AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2) 120else 121CFLAGS-$(CONFIG_PPC64) += -mcall-aixdesc 122endif 123CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,-mminimal-toc) 124CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 125CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD) 126 127ifeq ($(CONFIG_PPC_BOOK3S_64),y) 128CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4) 129else 130CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 131endif 132 133CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell) 134CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4) 135CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5) 136CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6) 137CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7) 138CFLAGS-$(CONFIG_POWER8_CPU) += $(call cc-option,-mcpu=power8) 139 140# Altivec option not allowed with e500mc64 in GCC. 141ifeq ($(CONFIG_ALTIVEC),y) 142E5500_CPU := -mcpu=powerpc64 143else 144E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 145endif 146CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 147CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 148 149ifeq ($(CONFIG_PPC32),y) 150ifeq ($(CONFIG_PPC_E500MC),y) 151CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc) 152else 153CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc) 154endif 155endif 156 157CFLAGS-$(CONFIG_TUNE_CELL) += $(call cc-option,-mtune=cell) 158 159asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 160 161KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr) 162KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y) 163KBUILD_CFLAGS += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y) 164CPP = $(CC) -E $(KBUILD_CFLAGS) 165 166CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__ 167 168KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 169 170ifeq ($(CONFIG_476FPE_ERR46),y) 171 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 172 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 173endif 174 175# No AltiVec or VSX instructions when building kernel 176KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 177KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 178 179# No SPE instruction when building kernel 180# (We use all available options to help semi-broken compilers) 181KBUILD_CFLAGS += $(call cc-option,-mno-spe) 182KBUILD_CFLAGS += $(call cc-option,-mspe=no) 183 184# Enable unit-at-a-time mode when possible. It shrinks the 185# kernel considerably. 186KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) 187 188# FIXME: the module load should be taught about the additional relocs 189# generated by this. 190# revert to pre-gcc-4.4 behaviour of .eh_frame 191KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 192 193# Never use string load/store instructions as they are 194# often slow when they are implemented at all 195KBUILD_CFLAGS += -mno-string 196 197ifeq ($(CONFIG_6xx),y) 198KBUILD_CFLAGS += -mcpu=powerpc 199endif 200 201# Work around a gcc code-gen bug with -fno-omit-frame-pointer. 202ifeq ($(CONFIG_FUNCTION_TRACER),y) 203KBUILD_CFLAGS += -mno-sched-epilog 204endif 205 206cpu-as-$(CONFIG_4xx) += -Wa,-m405 207cpu-as-$(CONFIG_ALTIVEC) += -Wa,-maltivec 208cpu-as-$(CONFIG_E200) += -Wa,-me200 209 210KBUILD_AFLAGS += $(cpu-as-y) 211KBUILD_CFLAGS += $(cpu-as-y) 212 213head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o 214head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o 215head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 216head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 217head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 218 219head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 220head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 221head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 222head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 223 224core-y += arch/powerpc/kernel/ \ 225 arch/powerpc/mm/ \ 226 arch/powerpc/lib/ \ 227 arch/powerpc/sysdev/ \ 228 arch/powerpc/platforms/ \ 229 arch/powerpc/math-emu/ \ 230 arch/powerpc/crypto/ \ 231 arch/powerpc/net/ 232core-$(CONFIG_XMON) += arch/powerpc/xmon/ 233core-$(CONFIG_KVM) += arch/powerpc/kvm/ 234core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/ 235 236drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 237 238# Default to zImage, override when needed 239all: zImage 240 241# With make 3.82 we cannot mix normal and wildcard targets 242BOOT_TARGETS1 := zImage zImage.initrd uImage 243BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 244 245PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 246 247boot := arch/$(ARCH)/boot 248 249ifeq ($(CONFIG_RELOCATABLE),y) 250quiet_cmd_relocs_check = CALL $< 251 cmd_relocs_check = perl $< "$(OBJDUMP)" "$(obj)/vmlinux" 252 253PHONY += relocs_check 254relocs_check: arch/powerpc/relocs_check.pl vmlinux 255 $(call cmd,relocs_check) 256 257zImage: relocs_check 258endif 259 260$(BOOT_TARGETS1): vmlinux 261 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 262$(BOOT_TARGETS2): vmlinux 263 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 264 265 266bootwrapper_install: 267 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 268 269%.dtb: scripts 270 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 271 272define archhelp 273 @echo '* zImage - Build default images selected by kernel config' 274 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 275 @echo ' uImage - U-Boot native image format' 276 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 277 @echo ' versions which do not support device trees' 278 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 279 @echo ' simpleImage.<dt> - Firmware independent image.' 280 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 281 @echo ' install - Install kernel using' 282 @echo ' (your) ~/bin/$(INSTALLKERNEL) or' 283 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 284 @echo ' install to $$(INSTALL_PATH) and run lilo' 285 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 286 @echo '' 287 @echo ' Targets with <dt> embed a device tree blob inside the image' 288 @echo ' These targets support board with firmware that does not' 289 @echo ' support passing a device tree directly. Replace <dt> with the' 290 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 291 @echo ' (minus the .dts extension).' 292endef 293 294install: 295 $(Q)$(MAKE) $(build)=$(boot) install 296 297vdso_install: 298ifeq ($(CONFIG_PPC64),y) 299 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 300endif 301 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 302 303archclean: 304 $(Q)$(MAKE) $(clean)=$(boot) 305 306archprepare: checkbin 307 308# Use the file '.tmp_gas_check' for binutils tests, as gas won't output 309# to stdout and these checks are run even on install targets. 310TOUT := .tmp_gas_check 311 312# Check gcc and binutils versions: 313# - gcc-3.4 and binutils-2.14 are a fatal combination 314# - Require gcc 4.0 or above on 64-bit 315# - gcc-4.2.0 has issues compiling modules on 64-bit 316checkbin: 317 @if test "$(cc-version)" = "0304" ; then \ 318 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \ 319 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \ 320 echo 'correctly with gcc-3.4 and your version of binutils.'; \ 321 echo '*** Please upgrade your binutils or downgrade your gcc'; \ 322 false; \ 323 fi ; \ 324 fi 325 @if test "$(cc-version)" -lt "0400" \ 326 && test "x${CONFIG_PPC64}" = "xy" ; then \ 327 echo -n "Sorry, GCC v4.0 or above is required to build " ; \ 328 echo "the 64-bit powerpc kernel." ; \ 329 false ; \ 330 fi 331 @if test "$(cc-fullversion)" = "040200" \ 332 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \ 333 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \ 334 echo 'kernel with modules enabled.' ; \ 335 echo -n '*** Please use a different GCC version or ' ; \ 336 echo 'disable kernel modules' ; \ 337 false ; \ 338 fi 339 340CLEAN_FILES += $(TOUT) 341 342