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