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 := $(call cc-option-yn, -m32) 16 17# Set default 32 bits cross compilers for vdso and boot wrapper 18CROSS32_COMPILE ?= 19 20ifeq ($(HAS_BIARCH),y) 21ifeq ($(CROSS32_COMPILE),) 22ifdef CONFIG_PPC32 23# These options will be overridden by any -mcpu option that the CPU 24# or platform code sets later on the command line, but they are needed 25# to set a sane 32-bit cpu target for the 64-bit cross compiler which 26# may default to the wrong ISA. 27KBUILD_CFLAGS += -mcpu=powerpc 28KBUILD_AFLAGS += -mcpu=powerpc 29endif 30endif 31endif 32 33ifeq ($(CROSS_COMPILE),) 34KBUILD_DEFCONFIG := $(shell uname -m)_defconfig 35else 36KBUILD_DEFCONFIG := ppc64_defconfig 37endif 38 39ifdef CONFIG_PPC64 40new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi) 41 42ifeq ($(new_nm),y) 43NM := $(NM) --synthetic 44endif 45endif 46 47# BITS is used as extension for files which are available in a 32 bit 48# and a 64 bit version to simplify shared Makefiles. 49# e.g.: obj-y += foo_$(BITS).o 50export BITS 51 52ifdef CONFIG_PPC64 53 BITS := 64 54else 55 BITS := 32 56endif 57 58machine-y = ppc 59machine-$(CONFIG_PPC64) += 64 60machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le 61UTS_MACHINE := $(subst $(space),,$(machine-y)) 62 63# XXX This needs to be before we override LD below 64ifdef CONFIG_PPC32 65KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 66else 67KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/powerpc/kernel/module.lds 68ifeq ($(call ld-ifversion, -ge, 225000000, y),y) 69# Have the linker provide sfpr if possible. 70# There is a corresponding test in arch/powerpc/lib/Makefile 71KBUILD_LDFLAGS_MODULE += --save-restore-funcs 72else 73KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 74endif 75endif 76 77ifdef CONFIG_CPU_LITTLE_ENDIAN 78KBUILD_CFLAGS += -mlittle-endian 79KBUILD_LDFLAGS += -EL 80LDEMULATION := lppc 81GNUTARGET := powerpcle 82MULTIPLEWORD := -mno-multiple 83KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect) 84else 85KBUILD_CFLAGS += $(call cc-option,-mbig-endian) 86KBUILD_LDFLAGS += -EB 87LDEMULATION := ppc 88GNUTARGET := powerpc 89MULTIPLEWORD := -mmultiple 90endif 91 92ifdef CONFIG_PPC64 93cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 94cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc) 95aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 96aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2 97endif 98 99ifneq ($(cc-name),clang) 100 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align 101endif 102 103cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 104cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 105aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 106aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 107 108ifeq ($(HAS_BIARCH),y) 109KBUILD_CFLAGS += -m$(BITS) 110KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS) 111KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION) 112KBUILD_ARFLAGS += --target=elf$(BITS)-$(GNUTARGET) 113endif 114 115LDFLAGS_vmlinux-y := -Bstatic 116LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 117LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 118LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn) 119 120ifdef CONFIG_PPC64 121ifeq ($(call cc-option-yn,-mcmodel=medium),y) 122 # -mcmodel=medium breaks modules because it uses 32bit offsets from 123 # the TOC pointer to create pointers where possible. Pointers into the 124 # percpu data area are created by this method. 125 # 126 # The kernel module loader relocates the percpu data section from the 127 # original location (starting with 0xd...) to somewhere in the base 128 # kernel percpu data space (starting with 0xc...). We need a full 129 # 64bit relocation for this to work, hence -mcmodel=large. 130 KBUILD_CFLAGS_MODULE += -mcmodel=large 131else 132 export NO_MINIMAL_TOC := -mno-minimal-toc 133endif 134endif 135 136CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no) 137ifdef CONFIG_CPU_LITTLE_ENDIAN 138CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc)) 139AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2) 140else 141CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 142CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc) 143AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 144endif 145CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc)) 146CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 147 148CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD) 149CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata) 150 151ifdef CONFIG_PPC_BOOK3S_64 152ifdef CONFIG_CPU_LITTLE_ENDIAN 153CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8 154CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8) 155else 156CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5)) 157CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4) 158endif 159else 160CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 161endif 162 163ifdef CONFIG_MPROFILE_KERNEL 164 CC_FLAGS_FTRACE := -pg -mprofile-kernel 165endif 166 167CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) 168 169# Altivec option not allowed with e500mc64 in GCC. 170ifdef CONFIG_ALTIVEC 171E5500_CPU := -mcpu=powerpc64 172else 173E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 174endif 175CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 176CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 177 178ifdef CONFIG_PPC32 179ifdef CONFIG_PPC_E500MC 180CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc) 181else 182CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc) 183endif 184endif 185 186asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 187 188KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr) 189KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y) 190KBUILD_CFLAGS += $(call cc-option,-msoft-float) 191KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y) 192CPP = $(CC) -E $(KBUILD_CFLAGS) 193 194CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ 195ifdef CONFIG_CPU_BIG_ENDIAN 196CHECKFLAGS += -D__BIG_ENDIAN__ 197else 198CHECKFLAGS += -D__LITTLE_ENDIAN__ 199endif 200 201ifdef CONFIG_476FPE_ERR46 202 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 203 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 204endif 205 206# No AltiVec or VSX instructions when building kernel 207KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 208KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 209 210# No SPE instruction when building kernel 211# (We use all available options to help semi-broken compilers) 212KBUILD_CFLAGS += $(call cc-option,-mno-spe) 213KBUILD_CFLAGS += $(call cc-option,-mspe=no) 214 215# Enable unit-at-a-time mode when possible. It shrinks the 216# kernel considerably. 217KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) 218 219# FIXME: the module load should be taught about the additional relocs 220# generated by this. 221# revert to pre-gcc-4.4 behaviour of .eh_frame 222KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 223 224# Never use string load/store instructions as they are 225# often slow when they are implemented at all 226KBUILD_CFLAGS += $(call cc-option,-mno-string) 227 228ifdef CONFIG_6xx 229KBUILD_CFLAGS += -mcpu=powerpc 230endif 231 232# Work around a gcc code-gen bug with -fno-omit-frame-pointer. 233ifdef CONFIG_FUNCTION_TRACER 234KBUILD_CFLAGS += -mno-sched-epilog 235endif 236 237cpu-as-$(CONFIG_4xx) += -Wa,-m405 238cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec) 239cpu-as-$(CONFIG_E200) += -Wa,-me200 240cpu-as-$(CONFIG_E500) += -Wa,-me500 241cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 242cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc) 243 244KBUILD_AFLAGS += $(cpu-as-y) 245KBUILD_CFLAGS += $(cpu-as-y) 246 247KBUILD_AFLAGS += $(aflags-y) 248KBUILD_CFLAGS += $(cflags-y) 249 250head-y := arch/powerpc/kernel/head_$(BITS).o 251head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o 252head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 253head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 254head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 255 256head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 257head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 258head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 259head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 260 261core-y += arch/powerpc/kernel/ \ 262 arch/powerpc/mm/ \ 263 arch/powerpc/lib/ \ 264 arch/powerpc/sysdev/ \ 265 arch/powerpc/platforms/ \ 266 arch/powerpc/math-emu/ \ 267 arch/powerpc/crypto/ \ 268 arch/powerpc/net/ 269core-$(CONFIG_XMON) += arch/powerpc/xmon/ 270core-$(CONFIG_KVM) += arch/powerpc/kvm/ 271core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/ 272core-$(CONFIG_KEXEC_FILE) += arch/powerpc/purgatory/ 273 274drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 275 276# Default to zImage, override when needed 277all: zImage 278 279# With make 3.82 we cannot mix normal and wildcard targets 280BOOT_TARGETS1 := zImage zImage.initrd uImage 281BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 282 283PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 284 285boot := arch/$(ARCH)/boot 286 287$(BOOT_TARGETS1): vmlinux 288 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 289$(BOOT_TARGETS2): vmlinux 290 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 291 292 293bootwrapper_install: 294 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 295 296%.dtb: scripts 297 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 298 299# Used to create 'merged defconfigs' 300# To use it $(call) it with the first argument as the base defconfig 301# and the second argument as a space separated list of .config files to merge, 302# without the .config suffix. 303define merge_into_defconfig 304 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 305 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \ 306 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config) 307 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 308endef 309 310PHONY += pseries_le_defconfig 311pseries_le_defconfig: 312 $(call merge_into_defconfig,pseries_defconfig,le) 313 314PHONY += ppc64le_defconfig 315ppc64le_defconfig: 316 $(call merge_into_defconfig,ppc64_defconfig,le) 317 318PHONY += powernv_be_defconfig 319powernv_be_defconfig: 320 $(call merge_into_defconfig,powernv_defconfig,be) 321 322PHONY += mpc85xx_defconfig 323mpc85xx_defconfig: 324 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 325 85xx-32bit 85xx-hw fsl-emb-nonhw) 326 327PHONY += mpc85xx_smp_defconfig 328mpc85xx_smp_defconfig: 329 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 330 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 331 332PHONY += corenet32_smp_defconfig 333corenet32_smp_defconfig: 334 $(call merge_into_defconfig,corenet_basic_defconfig,\ 335 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) 336 337PHONY += corenet64_smp_defconfig 338corenet64_smp_defconfig: 339 $(call merge_into_defconfig,corenet_basic_defconfig,\ 340 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) 341 342PHONY += mpc86xx_defconfig 343mpc86xx_defconfig: 344 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 345 86xx-hw fsl-emb-nonhw) 346 347PHONY += mpc86xx_smp_defconfig 348mpc86xx_smp_defconfig: 349 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 350 86xx-smp 86xx-hw fsl-emb-nonhw) 351 352PHONY += ppc32_allmodconfig 353ppc32_allmodconfig: 354 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \ 355 -f $(srctree)/Makefile allmodconfig 356 357PHONY += ppc64le_allmodconfig 358ppc64le_allmodconfig: 359 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \ 360 -f $(srctree)/Makefile allmodconfig 361 362PHONY += ppc64_book3e_allmodconfig 363ppc64_book3e_allmodconfig: 364 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \ 365 -f $(srctree)/Makefile allmodconfig 366 367define archhelp 368 @echo '* zImage - Build default images selected by kernel config' 369 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 370 @echo ' uImage - U-Boot native image format' 371 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 372 @echo ' versions which do not support device trees' 373 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 374 @echo ' simpleImage.<dt> - Firmware independent image.' 375 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 376 @echo ' install - Install kernel using' 377 @echo ' (your) ~/bin/$(INSTALLKERNEL) or' 378 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 379 @echo ' install to $$(INSTALL_PATH) and run lilo' 380 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 381 @echo '' 382 @echo ' Targets with <dt> embed a device tree blob inside the image' 383 @echo ' These targets support board with firmware that does not' 384 @echo ' support passing a device tree directly. Replace <dt> with the' 385 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 386 @echo ' (minus the .dts extension).' 387endef 388 389install: 390 $(Q)$(MAKE) $(build)=$(boot) install 391 392vdso_install: 393ifdef CONFIG_PPC64 394 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 395endif 396 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 397 398archclean: 399 $(Q)$(MAKE) $(clean)=$(boot) 400 401archprepare: checkbin 402 403# Use the file '.tmp_gas_check' for binutils tests, as gas won't output 404# to stdout and these checks are run even on install targets. 405TOUT := .tmp_gas_check 406 407# Check gcc and binutils versions: 408# - gcc-3.4 and binutils-2.14 are a fatal combination 409# - Require gcc 4.0 or above on 64-bit 410# - gcc-4.2.0 has issues compiling modules on 64-bit 411checkbin: 412 @if test "$(cc-name)" != "clang" \ 413 && test "$(cc-version)" = "0304" ; then \ 414 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \ 415 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \ 416 echo 'correctly with gcc-3.4 and your version of binutils.'; \ 417 echo '*** Please upgrade your binutils or downgrade your gcc'; \ 418 false; \ 419 fi ; \ 420 fi 421 @if test "$(cc-name)" != "clang" \ 422 && test "$(cc-version)" -lt "0400" \ 423 && test "x${CONFIG_PPC64}" = "xy" ; then \ 424 echo -n "Sorry, GCC v4.0 or above is required to build " ; \ 425 echo "the 64-bit powerpc kernel." ; \ 426 false ; \ 427 fi 428 @if test "$(cc-name)" != "clang" \ 429 && test "$(cc-fullversion)" = "040200" \ 430 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \ 431 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \ 432 echo 'kernel with modules enabled.' ; \ 433 echo -n '*** Please use a different GCC version or ' ; \ 434 echo 'disable kernel modules' ; \ 435 false ; \ 436 fi 437 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \ 438 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \ 439 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \ 440 echo 'in some circumstances.' ; \ 441 echo -n '*** Please use a different binutils version.' ; \ 442 false ; \ 443 fi 444 445 446CLEAN_FILES += $(TOUT) 447 448