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 70ifneq ($(cc-name),clang) 71override CC += -mno-strict-align 72endif 73override AS += -mlittle-endian 74override LD += -EL 75override CROSS32CC += -mlittle-endian 76override CROSS32AS += -mlittle-endian 77LDEMULATION := lppc 78GNUTARGET := powerpcle 79MULTIPLEWORD := -mno-multiple 80KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect) 81else 82ifeq ($(call cc-option-yn,-mbig-endian),y) 83override CC += -mbig-endian 84override AS += -mbig-endian 85endif 86override LD += -EB 87LDEMULATION := ppc 88GNUTARGET := powerpc 89MULTIPLEWORD := -mmultiple 90endif 91 92ifeq ($(HAS_BIARCH),y) 93override AS += -a$(CONFIG_WORD_SIZE) 94override LD += -m elf$(CONFIG_WORD_SIZE)$(LDEMULATION) 95override CC += -m$(CONFIG_WORD_SIZE) 96override AR := GNUTARGET=elf$(CONFIG_WORD_SIZE)-$(GNUTARGET) $(AR) 97endif 98 99LDFLAGS_vmlinux-y := -Bstatic 100LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 101LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 102 103ifeq ($(CONFIG_PPC64),y) 104ifeq ($(call cc-option-yn,-mcmodel=medium),y) 105 # -mcmodel=medium breaks modules because it uses 32bit offsets from 106 # the TOC pointer to create pointers where possible. Pointers into the 107 # percpu data area are created by this method. 108 # 109 # The kernel module loader relocates the percpu data section from the 110 # original location (starting with 0xd...) to somewhere in the base 111 # kernel percpu data space (starting with 0xc...). We need a full 112 # 64bit relocation for this to work, hence -mcmodel=large. 113 KBUILD_CFLAGS_MODULE += -mcmodel=large 114else 115 export NO_MINIMAL_TOC := -mno-minimal-toc 116endif 117endif 118 119CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no) 120ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) 121CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc)) 122AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2) 123else 124CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc) 125endif 126CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc)) 127CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 128CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD) 129 130ifeq ($(CONFIG_PPC_BOOK3S_64),y) 131CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4) 132else 133CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 134endif 135 136CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell) 137CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4) 138CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5) 139CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6) 140CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7) 141CFLAGS-$(CONFIG_POWER8_CPU) += $(call cc-option,-mcpu=power8) 142 143# Altivec option not allowed with e500mc64 in GCC. 144ifeq ($(CONFIG_ALTIVEC),y) 145E5500_CPU := -mcpu=powerpc64 146else 147E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 148endif 149CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 150CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 151 152ifeq ($(CONFIG_PPC32),y) 153ifeq ($(CONFIG_PPC_E500MC),y) 154CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc) 155else 156CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc) 157endif 158endif 159 160asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 161 162KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr) 163KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y) 164KBUILD_CFLAGS += $(call cc-option,-msoft-float) 165KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y) 166CPP = $(CC) -E $(KBUILD_CFLAGS) 167 168CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__ 169 170KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 171 172ifeq ($(CONFIG_476FPE_ERR46),y) 173 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 174 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 175endif 176 177# No AltiVec or VSX instructions when building kernel 178KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 179KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 180 181# No SPE instruction when building kernel 182# (We use all available options to help semi-broken compilers) 183KBUILD_CFLAGS += $(call cc-option,-mno-spe) 184KBUILD_CFLAGS += $(call cc-option,-mspe=no) 185 186# Enable unit-at-a-time mode when possible. It shrinks the 187# kernel considerably. 188KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) 189 190# FIXME: the module load should be taught about the additional relocs 191# generated by this. 192# revert to pre-gcc-4.4 behaviour of .eh_frame 193KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 194 195# Never use string load/store instructions as they are 196# often slow when they are implemented at all 197KBUILD_CFLAGS += $(call cc-option,-mno-string) 198 199ifeq ($(CONFIG_6xx),y) 200KBUILD_CFLAGS += -mcpu=powerpc 201endif 202 203# Work around a gcc code-gen bug with -fno-omit-frame-pointer. 204ifeq ($(CONFIG_FUNCTION_TRACER),y) 205KBUILD_CFLAGS += -mno-sched-epilog 206endif 207 208cpu-as-$(CONFIG_4xx) += -Wa,-m405 209cpu-as-$(CONFIG_ALTIVEC) += -Wa,-maltivec 210cpu-as-$(CONFIG_E200) += -Wa,-me200 211 212KBUILD_AFLAGS += $(cpu-as-y) 213KBUILD_CFLAGS += $(cpu-as-y) 214 215head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o 216head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o 217head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 218head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 219head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 220 221head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 222head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 223head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 224head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 225 226core-y += arch/powerpc/kernel/ \ 227 arch/powerpc/mm/ \ 228 arch/powerpc/lib/ \ 229 arch/powerpc/sysdev/ \ 230 arch/powerpc/platforms/ \ 231 arch/powerpc/math-emu/ \ 232 arch/powerpc/crypto/ \ 233 arch/powerpc/net/ 234core-$(CONFIG_XMON) += arch/powerpc/xmon/ 235core-$(CONFIG_KVM) += arch/powerpc/kvm/ 236core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/ 237 238drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 239 240# Default to zImage, override when needed 241all: zImage 242 243# With make 3.82 we cannot mix normal and wildcard targets 244BOOT_TARGETS1 := zImage zImage.initrd uImage 245BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 246 247PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 248 249boot := arch/$(ARCH)/boot 250 251ifeq ($(CONFIG_RELOCATABLE),y) 252quiet_cmd_relocs_check = CALL $< 253 cmd_relocs_check = $(CONFIG_SHELL) $< "$(OBJDUMP)" "$(obj)/vmlinux" 254 255PHONY += relocs_check 256relocs_check: arch/powerpc/relocs_check.sh vmlinux 257 $(call cmd,relocs_check) 258 259zImage: relocs_check 260endif 261 262$(BOOT_TARGETS1): vmlinux 263 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 264$(BOOT_TARGETS2): vmlinux 265 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 266 267 268bootwrapper_install: 269 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 270 271%.dtb: scripts 272 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 273 274# Used to create 'merged defconfigs' 275# To use it $(call) it with the first argument as the base defconfig 276# and the second argument as a space separated list of .config files to merge, 277# without the .config suffix. 278define merge_into_defconfig 279 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 280 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \ 281 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config) 282 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 283endef 284 285PHONY += pseries_le_defconfig 286pseries_le_defconfig: 287 $(call merge_into_defconfig,pseries_defconfig,le) 288 289PHONY += ppc64le_defconfig 290ppc64le_defconfig: 291 $(call merge_into_defconfig,ppc64_defconfig,le) 292 293PHONY += mpc85xx_defconfig 294mpc85xx_defconfig: 295 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 296 85xx-32bit 85xx-hw fsl-emb-nonhw) 297 298PHONY += mpc85xx_smp_defconfig 299mpc85xx_smp_defconfig: 300 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 301 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 302 303PHONY += corenet32_smp_defconfig 304corenet32_smp_defconfig: 305 $(call merge_into_defconfig,corenet_basic_defconfig,\ 306 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 307 308PHONY += corenet64_smp_defconfig 309corenet64_smp_defconfig: 310 $(call merge_into_defconfig,corenet_basic_defconfig,\ 311 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw) 312 313define archhelp 314 @echo '* zImage - Build default images selected by kernel config' 315 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 316 @echo ' uImage - U-Boot native image format' 317 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 318 @echo ' versions which do not support device trees' 319 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 320 @echo ' simpleImage.<dt> - Firmware independent image.' 321 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 322 @echo ' install - Install kernel using' 323 @echo ' (your) ~/bin/$(INSTALLKERNEL) or' 324 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 325 @echo ' install to $$(INSTALL_PATH) and run lilo' 326 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 327 @echo '' 328 @echo ' Targets with <dt> embed a device tree blob inside the image' 329 @echo ' These targets support board with firmware that does not' 330 @echo ' support passing a device tree directly. Replace <dt> with the' 331 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 332 @echo ' (minus the .dts extension).' 333endef 334 335install: 336 $(Q)$(MAKE) $(build)=$(boot) install 337 338vdso_install: 339ifeq ($(CONFIG_PPC64),y) 340 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 341endif 342 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 343 344archclean: 345 $(Q)$(MAKE) $(clean)=$(boot) 346 347archprepare: checkbin 348 349# Use the file '.tmp_gas_check' for binutils tests, as gas won't output 350# to stdout and these checks are run even on install targets. 351TOUT := .tmp_gas_check 352 353# Check gcc and binutils versions: 354# - gcc-3.4 and binutils-2.14 are a fatal combination 355# - Require gcc 4.0 or above on 64-bit 356# - gcc-4.2.0 has issues compiling modules on 64-bit 357checkbin: 358 @if test "$(cc-name)" != "clang" \ 359 && test "$(cc-version)" = "0304" ; then \ 360 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \ 361 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \ 362 echo 'correctly with gcc-3.4 and your version of binutils.'; \ 363 echo '*** Please upgrade your binutils or downgrade your gcc'; \ 364 false; \ 365 fi ; \ 366 fi 367 @if test "$(cc-name)" != "clang" \ 368 && test "$(cc-version)" -lt "0400" \ 369 && test "x${CONFIG_PPC64}" = "xy" ; then \ 370 echo -n "Sorry, GCC v4.0 or above is required to build " ; \ 371 echo "the 64-bit powerpc kernel." ; \ 372 false ; \ 373 fi 374 @if test "$(cc-name)" != "clang" \ 375 && test "$(cc-fullversion)" = "040200" \ 376 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \ 377 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \ 378 echo 'kernel with modules enabled.' ; \ 379 echo -n '*** Please use a different GCC version or ' ; \ 380 echo 'disable kernel modules' ; \ 381 false ; \ 382 fi 383 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \ 384 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \ 385 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \ 386 echo 'in some circumstances.' ; \ 387 echo -n '*** Please use a different binutils version.' ; \ 388 false ; \ 389 fi 390 391 392CLEAN_FILES += $(TOUT) 393 394