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 := $(CC) -m32 26KBUILD_ARFLAGS += --target=elf32-powerpc 27endif 28endif 29 30export CROSS32CC CROSS32AR 31 32ifeq ($(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 := $(NM) --synthetic 43endif 44endif 45 46# BITS is used as extension for files which are available in a 32 bit 47# and a 64 bit version to simplify shared Makefiles. 48# e.g.: obj-y += foo_$(BITS).o 49export BITS 50 51ifdef CONFIG_PPC64 52 BITS := 64 53else 54 BITS := 32 55endif 56 57machine-y = ppc 58machine-$(CONFIG_PPC64) += 64 59machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le 60UTS_MACHINE := $(subst $(space),,$(machine-y)) 61 62# XXX This needs to be before we override LD below 63ifdef CONFIG_PPC32 64KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 65else 66KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/powerpc/kernel/module.lds 67ifeq ($(call ld-ifversion, -ge, 225000000, y),y) 68# Have the linker provide sfpr if possible. 69# There is a corresponding test in arch/powerpc/lib/Makefile 70KBUILD_LDFLAGS_MODULE += --save-restore-funcs 71else 72KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 73endif 74endif 75 76ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) 77override LD += -EL 78LDEMULATION := lppc 79GNUTARGET := powerpcle 80MULTIPLEWORD := -mno-multiple 81KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect) 82else 83override LD += -EB 84LDEMULATION := ppc 85GNUTARGET := powerpc 86MULTIPLEWORD := -mmultiple 87endif 88 89ifdef CONFIG_PPC64 90cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 91cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc) 92aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 93aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2 94endif 95 96cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 97cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 98ifneq ($(cc-name),clang) 99 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align 100endif 101 102aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 103aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 104 105ifeq ($(HAS_BIARCH),y) 106override AS += -a$(BITS) 107override LD += -m elf$(BITS)$(LDEMULATION) 108override CC += -m$(BITS) 109KBUILD_ARFLAGS += --target=elf$(BITS)-$(GNUTARGET) 110endif 111 112LDFLAGS_vmlinux-y := -Bstatic 113LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 114LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 115LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn) 116 117ifeq ($(CONFIG_PPC64),y) 118ifeq ($(call cc-option-yn,-mcmodel=medium),y) 119 # -mcmodel=medium breaks modules because it uses 32bit offsets from 120 # the TOC pointer to create pointers where possible. Pointers into the 121 # percpu data area are created by this method. 122 # 123 # The kernel module loader relocates the percpu data section from the 124 # original location (starting with 0xd...) to somewhere in the base 125 # kernel percpu data space (starting with 0xc...). We need a full 126 # 64bit relocation for this to work, hence -mcmodel=large. 127 KBUILD_CFLAGS_MODULE += -mcmodel=large 128else 129 export NO_MINIMAL_TOC := -mno-minimal-toc 130endif 131endif 132 133CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no) 134ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) 135CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc)) 136AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2) 137else 138CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 139CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc) 140AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 141endif 142CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc)) 143CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 144CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD) 145 146ifeq ($(CONFIG_PPC_BOOK3S_64),y) 147CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4) 148CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power4 149else 150CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 151endif 152 153ifdef CONFIG_MPROFILE_KERNEL 154 ifeq ($(shell $(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__),OK) 155 CC_FLAGS_FTRACE := -pg -mprofile-kernel 156 KBUILD_CPPFLAGS += -DCC_USING_MPROFILE_KERNEL 157 else 158 # If the user asked for mprofile-kernel but the toolchain doesn't 159 # support it, emit a warning and deliberately break the build later 160 # with mprofile-kernel-not-supported. We would prefer to make this an 161 # error right here, but then the user would never be able to run 162 # oldconfig to change their configuration. 163 $(warning Compiler does not support mprofile-kernel, set CONFIG_DISABLE_MPROFILE_KERNEL) 164 CC_FLAGS_FTRACE := -mprofile-kernel-not-supported 165 endif 166endif 167 168CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell) 169CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4) 170CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5) 171CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6) 172CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7) 173CFLAGS-$(CONFIG_POWER8_CPU) += $(call cc-option,-mcpu=power8) 174 175# Altivec option not allowed with e500mc64 in GCC. 176ifeq ($(CONFIG_ALTIVEC),y) 177E5500_CPU := -mcpu=powerpc64 178else 179E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 180endif 181CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 182CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 183 184ifeq ($(CONFIG_PPC32),y) 185ifeq ($(CONFIG_PPC_E500MC),y) 186CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc) 187else 188CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc) 189endif 190endif 191 192asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 193 194KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr) 195KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y) 196KBUILD_CFLAGS += $(call cc-option,-msoft-float) 197KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y) 198CPP = $(CC) -E $(KBUILD_CFLAGS) 199 200CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ 201ifdef CONFIG_CPU_BIG_ENDIAN 202CHECKFLAGS += -D__BIG_ENDIAN__ 203else 204CHECKFLAGS += -D__LITTLE_ENDIAN__ 205endif 206 207ifeq ($(CONFIG_476FPE_ERR46),y) 208 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 209 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 210endif 211 212# No AltiVec or VSX instructions when building kernel 213KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 214KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 215 216# No SPE instruction when building kernel 217# (We use all available options to help semi-broken compilers) 218KBUILD_CFLAGS += $(call cc-option,-mno-spe) 219KBUILD_CFLAGS += $(call cc-option,-mspe=no) 220 221# Enable unit-at-a-time mode when possible. It shrinks the 222# kernel considerably. 223KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) 224 225# FIXME: the module load should be taught about the additional relocs 226# generated by this. 227# revert to pre-gcc-4.4 behaviour of .eh_frame 228KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 229 230# Never use string load/store instructions as they are 231# often slow when they are implemented at all 232KBUILD_CFLAGS += $(call cc-option,-mno-string) 233 234ifeq ($(CONFIG_6xx),y) 235KBUILD_CFLAGS += -mcpu=powerpc 236endif 237 238# Work around a gcc code-gen bug with -fno-omit-frame-pointer. 239ifeq ($(CONFIG_FUNCTION_TRACER),y) 240KBUILD_CFLAGS += -mno-sched-epilog 241endif 242 243cpu-as-$(CONFIG_4xx) += -Wa,-m405 244cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec) 245cpu-as-$(CONFIG_E200) += -Wa,-me200 246 247KBUILD_AFLAGS += $(cpu-as-y) 248KBUILD_CFLAGS += $(cpu-as-y) 249 250KBUILD_AFLAGS += $(aflags-y) 251KBUILD_CFLAGS += $(cflags-y) 252 253head-y := arch/powerpc/kernel/head_$(BITS).o 254head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o 255head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 256head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 257head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 258 259head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 260head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 261head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 262head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 263 264core-y += arch/powerpc/kernel/ \ 265 arch/powerpc/mm/ \ 266 arch/powerpc/lib/ \ 267 arch/powerpc/sysdev/ \ 268 arch/powerpc/platforms/ \ 269 arch/powerpc/math-emu/ \ 270 arch/powerpc/crypto/ \ 271 arch/powerpc/net/ 272core-$(CONFIG_XMON) += arch/powerpc/xmon/ 273core-$(CONFIG_KVM) += arch/powerpc/kvm/ 274core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/ 275core-$(CONFIG_KEXEC_FILE) += arch/powerpc/purgatory/ 276 277drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 278 279# Default to zImage, override when needed 280all: zImage 281 282# With make 3.82 we cannot mix normal and wildcard targets 283BOOT_TARGETS1 := zImage zImage.initrd uImage 284BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 285 286PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 287 288boot := arch/$(ARCH)/boot 289 290$(BOOT_TARGETS1): vmlinux 291 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 292$(BOOT_TARGETS2): vmlinux 293 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 294 295 296bootwrapper_install: 297 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 298 299%.dtb: scripts 300 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 301 302# Used to create 'merged defconfigs' 303# To use it $(call) it with the first argument as the base defconfig 304# and the second argument as a space separated list of .config files to merge, 305# without the .config suffix. 306define merge_into_defconfig 307 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 308 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \ 309 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config) 310 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 311endef 312 313PHONY += pseries_le_defconfig 314pseries_le_defconfig: 315 $(call merge_into_defconfig,pseries_defconfig,le) 316 317PHONY += ppc64le_defconfig 318ppc64le_defconfig: 319 $(call merge_into_defconfig,ppc64_defconfig,le) 320 321PHONY += powernv_be_defconfig 322powernv_be_defconfig: 323 $(call merge_into_defconfig,powernv_defconfig,be) 324 325PHONY += mpc85xx_defconfig 326mpc85xx_defconfig: 327 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 328 85xx-32bit 85xx-hw fsl-emb-nonhw) 329 330PHONY += mpc85xx_smp_defconfig 331mpc85xx_smp_defconfig: 332 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 333 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 334 335PHONY += corenet32_smp_defconfig 336corenet32_smp_defconfig: 337 $(call merge_into_defconfig,corenet_basic_defconfig,\ 338 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) 339 340PHONY += corenet64_smp_defconfig 341corenet64_smp_defconfig: 342 $(call merge_into_defconfig,corenet_basic_defconfig,\ 343 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) 344 345PHONY += mpc86xx_defconfig 346mpc86xx_defconfig: 347 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 348 86xx-hw fsl-emb-nonhw) 349 350PHONY += mpc86xx_smp_defconfig 351mpc86xx_smp_defconfig: 352 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 353 86xx-smp 86xx-hw fsl-emb-nonhw) 354 355define archhelp 356 @echo '* zImage - Build default images selected by kernel config' 357 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 358 @echo ' uImage - U-Boot native image format' 359 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 360 @echo ' versions which do not support device trees' 361 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 362 @echo ' simpleImage.<dt> - Firmware independent image.' 363 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 364 @echo ' install - Install kernel using' 365 @echo ' (your) ~/bin/$(INSTALLKERNEL) or' 366 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 367 @echo ' install to $$(INSTALL_PATH) and run lilo' 368 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 369 @echo '' 370 @echo ' Targets with <dt> embed a device tree blob inside the image' 371 @echo ' These targets support board with firmware that does not' 372 @echo ' support passing a device tree directly. Replace <dt> with the' 373 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 374 @echo ' (minus the .dts extension).' 375endef 376 377install: 378 $(Q)$(MAKE) $(build)=$(boot) install 379 380vdso_install: 381ifeq ($(CONFIG_PPC64),y) 382 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 383endif 384 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 385 386archclean: 387 $(Q)$(MAKE) $(clean)=$(boot) 388 389archprepare: checkbin 390 391# Use the file '.tmp_gas_check' for binutils tests, as gas won't output 392# to stdout and these checks are run even on install targets. 393TOUT := .tmp_gas_check 394 395# Check gcc and binutils versions: 396# - gcc-3.4 and binutils-2.14 are a fatal combination 397# - Require gcc 4.0 or above on 64-bit 398# - gcc-4.2.0 has issues compiling modules on 64-bit 399checkbin: 400 @if test "$(cc-name)" != "clang" \ 401 && test "$(cc-version)" = "0304" ; then \ 402 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \ 403 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \ 404 echo 'correctly with gcc-3.4 and your version of binutils.'; \ 405 echo '*** Please upgrade your binutils or downgrade your gcc'; \ 406 false; \ 407 fi ; \ 408 fi 409 @if test "$(cc-name)" != "clang" \ 410 && test "$(cc-version)" -lt "0400" \ 411 && test "x${CONFIG_PPC64}" = "xy" ; then \ 412 echo -n "Sorry, GCC v4.0 or above is required to build " ; \ 413 echo "the 64-bit powerpc kernel." ; \ 414 false ; \ 415 fi 416 @if test "$(cc-name)" != "clang" \ 417 && test "$(cc-fullversion)" = "040200" \ 418 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \ 419 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \ 420 echo 'kernel with modules enabled.' ; \ 421 echo -n '*** Please use a different GCC version or ' ; \ 422 echo 'disable kernel modules' ; \ 423 false ; \ 424 fi 425 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \ 426 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \ 427 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \ 428 echo 'in some circumstances.' ; \ 429 echo -n '*** Please use a different binutils version.' ; \ 430 false ; \ 431 fi 432 433 434CLEAN_FILES += $(TOUT) 435 436