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 LD += -EL 70override CROSS32AS += -mlittle-endian 71LDEMULATION := lppc 72GNUTARGET := powerpcle 73MULTIPLEWORD := -mno-multiple 74KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect) 75else 76override LD += -EB 77LDEMULATION := ppc 78GNUTARGET := powerpc 79MULTIPLEWORD := -mmultiple 80endif 81 82cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 83cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 84ifneq ($(cc-name),clang) 85 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align 86endif 87 88aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 89aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 90 91ifeq ($(HAS_BIARCH),y) 92override AS += -a$(CONFIG_WORD_SIZE) 93override LD += -m elf$(CONFIG_WORD_SIZE)$(LDEMULATION) 94override CC += -m$(CONFIG_WORD_SIZE) 95override AR := GNUTARGET=elf$(CONFIG_WORD_SIZE)-$(GNUTARGET) $(AR) 96endif 97 98LDFLAGS_vmlinux-y := -Bstatic 99LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 100LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 101 102ifeq ($(CONFIG_PPC64),y) 103ifeq ($(call cc-option-yn,-mcmodel=medium),y) 104 # -mcmodel=medium breaks modules because it uses 32bit offsets from 105 # the TOC pointer to create pointers where possible. Pointers into the 106 # percpu data area are created by this method. 107 # 108 # The kernel module loader relocates the percpu data section from the 109 # original location (starting with 0xd...) to somewhere in the base 110 # kernel percpu data space (starting with 0xc...). We need a full 111 # 64bit relocation for this to work, hence -mcmodel=large. 112 KBUILD_CFLAGS_MODULE += -mcmodel=large 113else 114 export NO_MINIMAL_TOC := -mno-minimal-toc 115endif 116endif 117 118CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no) 119ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) 120CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc)) 121AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2) 122else 123CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc) 124endif 125CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc)) 126CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 127CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD) 128 129ifeq ($(CONFIG_PPC_BOOK3S_64),y) 130CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4) 131else 132CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 133endif 134 135ifdef CONFIG_MPROFILE_KERNEL 136 ifeq ($(shell $(srctree)/arch/powerpc/scripts/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__),OK) 137 CC_FLAGS_FTRACE := -pg -mprofile-kernel 138 KBUILD_CPPFLAGS += -DCC_USING_MPROFILE_KERNEL 139 else 140 # If the user asked for mprofile-kernel but the toolchain doesn't 141 # support it, emit a warning and deliberately break the build later 142 # with mprofile-kernel-not-supported. We would prefer to make this an 143 # error right here, but then the user would never be able to run 144 # oldconfig to change their configuration. 145 $(warning Compiler does not support mprofile-kernel, set CONFIG_DISABLE_MPROFILE_KERNEL) 146 CC_FLAGS_FTRACE := -mprofile-kernel-not-supported 147 endif 148endif 149 150CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell) 151CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4) 152CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5) 153CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6) 154CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7) 155CFLAGS-$(CONFIG_POWER8_CPU) += $(call cc-option,-mcpu=power8) 156 157# Altivec option not allowed with e500mc64 in GCC. 158ifeq ($(CONFIG_ALTIVEC),y) 159E5500_CPU := -mcpu=powerpc64 160else 161E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 162endif 163CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 164CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 165 166ifeq ($(CONFIG_PPC32),y) 167ifeq ($(CONFIG_PPC_E500MC),y) 168CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc) 169else 170CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc) 171endif 172endif 173 174asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 175 176KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr) 177KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y) 178KBUILD_CFLAGS += $(call cc-option,-msoft-float) 179KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y) 180CPP = $(CC) -E $(KBUILD_CFLAGS) 181 182CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__ 183ifdef CONFIG_CPU_BIG_ENDIAN 184CHECKFLAGS += -D__BIG_ENDIAN__ 185else 186CHECKFLAGS += -D__LITTLE_ENDIAN__ 187endif 188 189KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 190 191ifeq ($(CONFIG_476FPE_ERR46),y) 192 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 193 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 194endif 195 196# No AltiVec or VSX instructions when building kernel 197KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 198KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 199 200# No SPE instruction when building kernel 201# (We use all available options to help semi-broken compilers) 202KBUILD_CFLAGS += $(call cc-option,-mno-spe) 203KBUILD_CFLAGS += $(call cc-option,-mspe=no) 204 205# Enable unit-at-a-time mode when possible. It shrinks the 206# kernel considerably. 207KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) 208 209# FIXME: the module load should be taught about the additional relocs 210# generated by this. 211# revert to pre-gcc-4.4 behaviour of .eh_frame 212KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 213 214# Never use string load/store instructions as they are 215# often slow when they are implemented at all 216KBUILD_CFLAGS += $(call cc-option,-mno-string) 217 218ifeq ($(CONFIG_6xx),y) 219KBUILD_CFLAGS += -mcpu=powerpc 220endif 221 222# Work around a gcc code-gen bug with -fno-omit-frame-pointer. 223ifeq ($(CONFIG_FUNCTION_TRACER),y) 224KBUILD_CFLAGS += -mno-sched-epilog 225endif 226 227cpu-as-$(CONFIG_4xx) += -Wa,-m405 228cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec) 229cpu-as-$(CONFIG_E200) += -Wa,-me200 230 231KBUILD_AFLAGS += $(cpu-as-y) 232KBUILD_CFLAGS += $(cpu-as-y) 233 234KBUILD_AFLAGS += $(aflags-y) 235KBUILD_CFLAGS += $(cflags-y) 236 237head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o 238head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o 239head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 240head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 241head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 242 243head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 244head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 245head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 246head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 247 248core-y += arch/powerpc/kernel/ \ 249 arch/powerpc/mm/ \ 250 arch/powerpc/lib/ \ 251 arch/powerpc/sysdev/ \ 252 arch/powerpc/platforms/ \ 253 arch/powerpc/math-emu/ \ 254 arch/powerpc/crypto/ \ 255 arch/powerpc/net/ 256core-$(CONFIG_XMON) += arch/powerpc/xmon/ 257core-$(CONFIG_KVM) += arch/powerpc/kvm/ 258core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/ 259 260drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 261 262# Default to zImage, override when needed 263all: zImage 264 265# With make 3.82 we cannot mix normal and wildcard targets 266BOOT_TARGETS1 := zImage zImage.initrd uImage 267BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 268 269PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 270 271boot := arch/$(ARCH)/boot 272 273ifeq ($(CONFIG_RELOCATABLE),y) 274quiet_cmd_relocs_check = CALL $< 275 cmd_relocs_check = $(CONFIG_SHELL) $< "$(OBJDUMP)" "$(obj)/vmlinux" 276 277PHONY += relocs_check 278relocs_check: arch/powerpc/relocs_check.sh vmlinux 279 $(call cmd,relocs_check) 280 281zImage: relocs_check 282endif 283 284$(BOOT_TARGETS1): vmlinux 285 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 286$(BOOT_TARGETS2): vmlinux 287 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 288 289 290bootwrapper_install: 291 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 292 293%.dtb: scripts 294 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 295 296# Used to create 'merged defconfigs' 297# To use it $(call) it with the first argument as the base defconfig 298# and the second argument as a space separated list of .config files to merge, 299# without the .config suffix. 300define merge_into_defconfig 301 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 302 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \ 303 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config) 304 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 305endef 306 307PHONY += pseries_le_defconfig 308pseries_le_defconfig: 309 $(call merge_into_defconfig,pseries_defconfig,le) 310 311PHONY += ppc64le_defconfig 312ppc64le_defconfig: 313 $(call merge_into_defconfig,ppc64_defconfig,le) 314 315PHONY += mpc85xx_defconfig 316mpc85xx_defconfig: 317 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 318 85xx-32bit 85xx-hw fsl-emb-nonhw) 319 320PHONY += mpc85xx_smp_defconfig 321mpc85xx_smp_defconfig: 322 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 323 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 324 325PHONY += corenet32_smp_defconfig 326corenet32_smp_defconfig: 327 $(call merge_into_defconfig,corenet_basic_defconfig,\ 328 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 329 330PHONY += corenet64_smp_defconfig 331corenet64_smp_defconfig: 332 $(call merge_into_defconfig,corenet_basic_defconfig,\ 333 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw) 334 335PHONY += mpc86xx_defconfig 336mpc86xx_defconfig: 337 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 338 86xx-hw fsl-emb-nonhw) 339 340PHONY += mpc86xx_smp_defconfig 341mpc86xx_smp_defconfig: 342 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 343 86xx-smp 86xx-hw fsl-emb-nonhw) 344 345define archhelp 346 @echo '* zImage - Build default images selected by kernel config' 347 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 348 @echo ' uImage - U-Boot native image format' 349 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 350 @echo ' versions which do not support device trees' 351 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 352 @echo ' simpleImage.<dt> - Firmware independent image.' 353 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 354 @echo ' install - Install kernel using' 355 @echo ' (your) ~/bin/$(INSTALLKERNEL) or' 356 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 357 @echo ' install to $$(INSTALL_PATH) and run lilo' 358 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 359 @echo '' 360 @echo ' Targets with <dt> embed a device tree blob inside the image' 361 @echo ' These targets support board with firmware that does not' 362 @echo ' support passing a device tree directly. Replace <dt> with the' 363 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 364 @echo ' (minus the .dts extension).' 365endef 366 367install: 368 $(Q)$(MAKE) $(build)=$(boot) install 369 370vdso_install: 371ifeq ($(CONFIG_PPC64),y) 372 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 373endif 374 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 375 376archclean: 377 $(Q)$(MAKE) $(clean)=$(boot) 378 379archprepare: checkbin 380 381# Use the file '.tmp_gas_check' for binutils tests, as gas won't output 382# to stdout and these checks are run even on install targets. 383TOUT := .tmp_gas_check 384 385# Check gcc and binutils versions: 386# - gcc-3.4 and binutils-2.14 are a fatal combination 387# - Require gcc 4.0 or above on 64-bit 388# - gcc-4.2.0 has issues compiling modules on 64-bit 389checkbin: 390 @if test "$(cc-name)" != "clang" \ 391 && test "$(cc-version)" = "0304" ; then \ 392 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \ 393 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \ 394 echo 'correctly with gcc-3.4 and your version of binutils.'; \ 395 echo '*** Please upgrade your binutils or downgrade your gcc'; \ 396 false; \ 397 fi ; \ 398 fi 399 @if test "$(cc-name)" != "clang" \ 400 && test "$(cc-version)" -lt "0400" \ 401 && test "x${CONFIG_PPC64}" = "xy" ; then \ 402 echo -n "Sorry, GCC v4.0 or above is required to build " ; \ 403 echo "the 64-bit powerpc kernel." ; \ 404 false ; \ 405 fi 406 @if test "$(cc-name)" != "clang" \ 407 && test "$(cc-fullversion)" = "040200" \ 408 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \ 409 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \ 410 echo 'kernel with modules enabled.' ; \ 411 echo -n '*** Please use a different GCC version or ' ; \ 412 echo 'disable kernel modules' ; \ 413 false ; \ 414 fi 415 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \ 416 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \ 417 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \ 418 echo 'in some circumstances.' ; \ 419 echo -n '*** Please use a different binutils version.' ; \ 420 false ; \ 421 fi 422 423 424CLEAN_FILES += $(TOUT) 425 426