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 62ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) 63override LD += -EL 64LDEMULATION := lppc 65GNUTARGET := powerpcle 66MULTIPLEWORD := -mno-multiple 67KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect) 68else 69override LD += -EB 70LDEMULATION := ppc 71GNUTARGET := powerpc 72MULTIPLEWORD := -mmultiple 73endif 74 75cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 76cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 77ifneq ($(cc-name),clang) 78 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align 79endif 80 81aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 82aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 83 84ifeq ($(HAS_BIARCH),y) 85override AS += -a$(BITS) 86override LD += -m elf$(BITS)$(LDEMULATION) 87override CC += -m$(BITS) 88KBUILD_ARFLAGS += --target=elf$(BITS)-$(GNUTARGET) 89endif 90 91LDFLAGS_vmlinux-y := -Bstatic 92LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 93LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 94 95ifeq ($(CONFIG_PPC64),y) 96ifeq ($(call cc-option-yn,-mcmodel=medium),y) 97 # -mcmodel=medium breaks modules because it uses 32bit offsets from 98 # the TOC pointer to create pointers where possible. Pointers into the 99 # percpu data area are created by this method. 100 # 101 # The kernel module loader relocates the percpu data section from the 102 # original location (starting with 0xd...) to somewhere in the base 103 # kernel percpu data space (starting with 0xc...). We need a full 104 # 64bit relocation for this to work, hence -mcmodel=large. 105 KBUILD_CFLAGS_MODULE += -mcmodel=large 106else 107 export NO_MINIMAL_TOC := -mno-minimal-toc 108endif 109endif 110 111CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no) 112ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) 113CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc)) 114AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2) 115else 116CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc) 117endif 118CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc)) 119CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 120CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD) 121 122ifeq ($(CONFIG_PPC_BOOK3S_64),y) 123CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4) 124CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power4 125else 126CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 127endif 128 129ifdef CONFIG_MPROFILE_KERNEL 130 ifeq ($(shell $(srctree)/arch/powerpc/scripts/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__),OK) 131 CC_FLAGS_FTRACE := -pg -mprofile-kernel 132 KBUILD_CPPFLAGS += -DCC_USING_MPROFILE_KERNEL 133 else 134 # If the user asked for mprofile-kernel but the toolchain doesn't 135 # support it, emit a warning and deliberately break the build later 136 # with mprofile-kernel-not-supported. We would prefer to make this an 137 # error right here, but then the user would never be able to run 138 # oldconfig to change their configuration. 139 $(warning Compiler does not support mprofile-kernel, set CONFIG_DISABLE_MPROFILE_KERNEL) 140 CC_FLAGS_FTRACE := -mprofile-kernel-not-supported 141 endif 142endif 143 144CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell) 145CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4) 146CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5) 147CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6) 148CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7) 149CFLAGS-$(CONFIG_POWER8_CPU) += $(call cc-option,-mcpu=power8) 150 151# Altivec option not allowed with e500mc64 in GCC. 152ifeq ($(CONFIG_ALTIVEC),y) 153E5500_CPU := -mcpu=powerpc64 154else 155E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 156endif 157CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 158CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 159 160ifeq ($(CONFIG_PPC32),y) 161ifeq ($(CONFIG_PPC_E500MC),y) 162CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc) 163else 164CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc) 165endif 166endif 167 168asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 169 170KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr) 171KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y) 172KBUILD_CFLAGS += $(call cc-option,-msoft-float) 173KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y) 174CPP = $(CC) -E $(KBUILD_CFLAGS) 175 176CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ 177ifdef CONFIG_CPU_BIG_ENDIAN 178CHECKFLAGS += -D__BIG_ENDIAN__ 179else 180CHECKFLAGS += -D__LITTLE_ENDIAN__ 181endif 182 183KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 184 185ifeq ($(CONFIG_476FPE_ERR46),y) 186 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 187 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 188endif 189 190# No AltiVec or VSX instructions when building kernel 191KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 192KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 193 194# No SPE instruction when building kernel 195# (We use all available options to help semi-broken compilers) 196KBUILD_CFLAGS += $(call cc-option,-mno-spe) 197KBUILD_CFLAGS += $(call cc-option,-mspe=no) 198 199# Enable unit-at-a-time mode when possible. It shrinks the 200# kernel considerably. 201KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) 202 203# FIXME: the module load should be taught about the additional relocs 204# generated by this. 205# revert to pre-gcc-4.4 behaviour of .eh_frame 206KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 207 208# Never use string load/store instructions as they are 209# often slow when they are implemented at all 210KBUILD_CFLAGS += $(call cc-option,-mno-string) 211 212ifeq ($(CONFIG_6xx),y) 213KBUILD_CFLAGS += -mcpu=powerpc 214endif 215 216# Work around a gcc code-gen bug with -fno-omit-frame-pointer. 217ifeq ($(CONFIG_FUNCTION_TRACER),y) 218KBUILD_CFLAGS += -mno-sched-epilog 219endif 220 221cpu-as-$(CONFIG_4xx) += -Wa,-m405 222cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec) 223cpu-as-$(CONFIG_E200) += -Wa,-me200 224 225KBUILD_AFLAGS += $(cpu-as-y) 226KBUILD_CFLAGS += $(cpu-as-y) 227 228KBUILD_AFLAGS += $(aflags-y) 229KBUILD_CFLAGS += $(cflags-y) 230 231head-y := arch/powerpc/kernel/head_$(BITS).o 232head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o 233head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 234head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 235head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 236 237head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 238head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 239head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 240head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 241 242core-y += arch/powerpc/kernel/ \ 243 arch/powerpc/mm/ \ 244 arch/powerpc/lib/ \ 245 arch/powerpc/sysdev/ \ 246 arch/powerpc/platforms/ \ 247 arch/powerpc/math-emu/ \ 248 arch/powerpc/crypto/ \ 249 arch/powerpc/net/ 250core-$(CONFIG_XMON) += arch/powerpc/xmon/ 251core-$(CONFIG_KVM) += arch/powerpc/kvm/ 252core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/ 253core-$(CONFIG_KEXEC_FILE) += arch/powerpc/purgatory/ 254 255drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 256 257# Default to zImage, override when needed 258all: zImage 259 260# With make 3.82 we cannot mix normal and wildcard targets 261BOOT_TARGETS1 := zImage zImage.initrd uImage 262BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 263 264PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 265 266boot := arch/$(ARCH)/boot 267 268ifeq ($(CONFIG_RELOCATABLE),y) 269quiet_cmd_relocs_check = CALL $< 270 cmd_relocs_check = $(CONFIG_SHELL) $< "$(OBJDUMP)" "$(obj)/vmlinux" 271 272PHONY += relocs_check 273relocs_check: arch/powerpc/relocs_check.sh vmlinux 274 $(call cmd,relocs_check) 275 276zImage: relocs_check 277endif 278 279$(BOOT_TARGETS1): vmlinux 280 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 281$(BOOT_TARGETS2): vmlinux 282 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 283 284 285bootwrapper_install: 286 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 287 288%.dtb: scripts 289 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 290 291# Used to create 'merged defconfigs' 292# To use it $(call) it with the first argument as the base defconfig 293# and the second argument as a space separated list of .config files to merge, 294# without the .config suffix. 295define merge_into_defconfig 296 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 297 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \ 298 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config) 299 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 300endef 301 302PHONY += pseries_le_defconfig 303pseries_le_defconfig: 304 $(call merge_into_defconfig,pseries_defconfig,le) 305 306PHONY += ppc64le_defconfig 307ppc64le_defconfig: 308 $(call merge_into_defconfig,ppc64_defconfig,le) 309 310PHONY += mpc85xx_defconfig 311mpc85xx_defconfig: 312 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 313 85xx-32bit 85xx-hw fsl-emb-nonhw) 314 315PHONY += mpc85xx_smp_defconfig 316mpc85xx_smp_defconfig: 317 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 318 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 319 320PHONY += corenet32_smp_defconfig 321corenet32_smp_defconfig: 322 $(call merge_into_defconfig,corenet_basic_defconfig,\ 323 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) 324 325PHONY += corenet64_smp_defconfig 326corenet64_smp_defconfig: 327 $(call merge_into_defconfig,corenet_basic_defconfig,\ 328 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) 329 330PHONY += mpc86xx_defconfig 331mpc86xx_defconfig: 332 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 333 86xx-hw fsl-emb-nonhw) 334 335PHONY += mpc86xx_smp_defconfig 336mpc86xx_smp_defconfig: 337 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 338 86xx-smp 86xx-hw fsl-emb-nonhw) 339 340define archhelp 341 @echo '* zImage - Build default images selected by kernel config' 342 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 343 @echo ' uImage - U-Boot native image format' 344 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 345 @echo ' versions which do not support device trees' 346 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 347 @echo ' simpleImage.<dt> - Firmware independent image.' 348 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 349 @echo ' install - Install kernel using' 350 @echo ' (your) ~/bin/$(INSTALLKERNEL) or' 351 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 352 @echo ' install to $$(INSTALL_PATH) and run lilo' 353 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 354 @echo '' 355 @echo ' Targets with <dt> embed a device tree blob inside the image' 356 @echo ' These targets support board with firmware that does not' 357 @echo ' support passing a device tree directly. Replace <dt> with the' 358 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 359 @echo ' (minus the .dts extension).' 360endef 361 362install: 363 $(Q)$(MAKE) $(build)=$(boot) install 364 365vdso_install: 366ifeq ($(CONFIG_PPC64),y) 367 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 368endif 369 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 370 371archclean: 372 $(Q)$(MAKE) $(clean)=$(boot) 373 374archprepare: checkbin 375 376# Use the file '.tmp_gas_check' for binutils tests, as gas won't output 377# to stdout and these checks are run even on install targets. 378TOUT := .tmp_gas_check 379 380# Check gcc and binutils versions: 381# - gcc-3.4 and binutils-2.14 are a fatal combination 382# - Require gcc 4.0 or above on 64-bit 383# - gcc-4.2.0 has issues compiling modules on 64-bit 384checkbin: 385 @if test "$(cc-name)" != "clang" \ 386 && test "$(cc-version)" = "0304" ; then \ 387 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \ 388 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \ 389 echo 'correctly with gcc-3.4 and your version of binutils.'; \ 390 echo '*** Please upgrade your binutils or downgrade your gcc'; \ 391 false; \ 392 fi ; \ 393 fi 394 @if test "$(cc-name)" != "clang" \ 395 && test "$(cc-version)" -lt "0400" \ 396 && test "x${CONFIG_PPC64}" = "xy" ; then \ 397 echo -n "Sorry, GCC v4.0 or above is required to build " ; \ 398 echo "the 64-bit powerpc kernel." ; \ 399 false ; \ 400 fi 401 @if test "$(cc-name)" != "clang" \ 402 && test "$(cc-fullversion)" = "040200" \ 403 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \ 404 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \ 405 echo 'kernel with modules enabled.' ; \ 406 echo -n '*** Please use a different GCC version or ' ; \ 407 echo 'disable kernel modules' ; \ 408 false ; \ 409 fi 410 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \ 411 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \ 412 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \ 413 echo 'in some circumstances.' ; \ 414 echo -n '*** Please use a different binutils version.' ; \ 415 false ; \ 416 fi 417 418 419CLEAN_FILES += $(TOUT) 420 421