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 CC += -mlittle-endian -mno-strict-align 70override AS += -mlittle-endian 71override LD += -EL 72override CROSS32CC += -mlittle-endian 73override CROSS32AS += -mlittle-endian 74LDEMULATION := lppc 75GNUTARGET := powerpcle 76MULTIPLEWORD := -mno-multiple 77else 78ifeq ($(call cc-option-yn,-mbig-endian),y) 79override CC += -mbig-endian 80override AS += -mbig-endian 81endif 82override LD += -EB 83LDEMULATION := ppc 84GNUTARGET := powerpc 85MULTIPLEWORD := -mmultiple 86endif 87 88ifeq ($(HAS_BIARCH),y) 89override AS += -a$(CONFIG_WORD_SIZE) 90override LD += -m elf$(CONFIG_WORD_SIZE)$(LDEMULATION) 91override CC += -m$(CONFIG_WORD_SIZE) 92override AR := GNUTARGET=elf$(CONFIG_WORD_SIZE)-$(GNUTARGET) $(AR) 93endif 94 95LDFLAGS_vmlinux-y := -Bstatic 96LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 97LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 98 99ifeq ($(CONFIG_PPC64),y) 100ifeq ($(call cc-option-yn,-mcmodel=medium),y) 101 # -mcmodel=medium breaks modules because it uses 32bit offsets from 102 # the TOC pointer to create pointers where possible. Pointers into the 103 # percpu data area are created by this method. 104 # 105 # The kernel module loader relocates the percpu data section from the 106 # original location (starting with 0xd...) to somewhere in the base 107 # kernel percpu data space (starting with 0xc...). We need a full 108 # 64bit relocation for this to work, hence -mcmodel=large. 109 KBUILD_CFLAGS_MODULE += -mcmodel=large 110else 111 export NO_MINIMAL_TOC := -mno-minimal-toc 112endif 113endif 114 115CFLAGS-$(CONFIG_PPC64) := -mtraceback=no -mcall-aixdesc 116CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 117CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,-mminimal-toc) 118CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 119CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD) 120 121ifeq ($(CONFIG_PPC_BOOK3S_64),y) 122CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4) 123else 124CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 125endif 126 127CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell) 128CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4) 129CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5) 130CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6) 131CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7) 132 133# Altivec option not allowed with e500mc64 in GCC. 134ifeq ($(CONFIG_ALTIVEC),y) 135E5500_CPU := -mcpu=powerpc64 136else 137E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 138endif 139CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 140CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 141 142ifeq ($(CONFIG_PPC32),y) 143ifeq ($(CONFIG_PPC_E500MC),y) 144CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc) 145else 146CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc) 147endif 148endif 149 150CFLAGS-$(CONFIG_TUNE_CELL) += $(call cc-option,-mtune=cell) 151 152KBUILD_CPPFLAGS += -Iarch/$(ARCH) 153KBUILD_AFLAGS += -Iarch/$(ARCH) 154KBUILD_CFLAGS += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y) 155CPP = $(CC) -E $(KBUILD_CFLAGS) 156 157CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__ 158 159KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 160 161# No AltiVec or VSX instructions when building kernel 162KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 163KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 164 165# No SPE instruction when building kernel 166# (We use all available options to help semi-broken compilers) 167KBUILD_CFLAGS += $(call cc-option,-mno-spe) 168KBUILD_CFLAGS += $(call cc-option,-mspe=no) 169 170# Enable unit-at-a-time mode when possible. It shrinks the 171# kernel considerably. 172KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) 173 174# FIXME: the module load should be taught about the additional relocs 175# generated by this. 176# revert to pre-gcc-4.4 behaviour of .eh_frame 177KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 178 179# Never use string load/store instructions as they are 180# often slow when they are implemented at all 181KBUILD_CFLAGS += -mno-string 182 183ifeq ($(CONFIG_6xx),y) 184KBUILD_CFLAGS += -mcpu=powerpc 185endif 186 187# Work around a gcc code-gen bug with -fno-omit-frame-pointer. 188ifeq ($(CONFIG_FUNCTION_TRACER),y) 189KBUILD_CFLAGS += -mno-sched-epilog 190endif 191 192cpu-as-$(CONFIG_4xx) += -Wa,-m405 193cpu-as-$(CONFIG_ALTIVEC) += -Wa,-maltivec 194cpu-as-$(CONFIG_E200) += -Wa,-me200 195 196KBUILD_AFLAGS += $(cpu-as-y) 197KBUILD_CFLAGS += $(cpu-as-y) 198 199head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o 200head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o 201head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 202head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 203head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 204 205head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 206head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 207head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 208head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 209 210core-y += arch/powerpc/kernel/ \ 211 arch/powerpc/mm/ \ 212 arch/powerpc/lib/ \ 213 arch/powerpc/sysdev/ \ 214 arch/powerpc/platforms/ \ 215 arch/powerpc/math-emu/ \ 216 arch/powerpc/crypto/ \ 217 arch/powerpc/net/ 218core-$(CONFIG_XMON) += arch/powerpc/xmon/ 219core-$(CONFIG_KVM) += arch/powerpc/kvm/ 220core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/ 221 222drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 223 224# Default to zImage, override when needed 225all: zImage 226 227# With make 3.82 we cannot mix normal and wildcard targets 228BOOT_TARGETS1 := zImage zImage.initrd uImage 229BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 230 231PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 232 233boot := arch/$(ARCH)/boot 234 235ifeq ($(CONFIG_RELOCATABLE),y) 236quiet_cmd_relocs_check = CALL $< 237 cmd_relocs_check = perl $< "$(OBJDUMP)" "$(obj)/vmlinux" 238 239PHONY += relocs_check 240relocs_check: arch/powerpc/relocs_check.pl vmlinux 241 $(call cmd,relocs_check) 242 243zImage: relocs_check 244endif 245 246$(BOOT_TARGETS1): vmlinux 247 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 248$(BOOT_TARGETS2): vmlinux 249 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 250 251 252bootwrapper_install: 253 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 254 255%.dtb: scripts 256 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 257 258define archhelp 259 @echo '* zImage - Build default images selected by kernel config' 260 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 261 @echo ' uImage - U-Boot native image format' 262 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 263 @echo ' versions which do not support device trees' 264 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 265 @echo ' simpleImage.<dt> - Firmware independent image.' 266 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 267 @echo ' install - Install kernel using' 268 @echo ' (your) ~/bin/$(INSTALLKERNEL) or' 269 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 270 @echo ' install to $$(INSTALL_PATH) and run lilo' 271 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 272 @echo '' 273 @echo ' Targets with <dt> embed a device tree blob inside the image' 274 @echo ' These targets support board with firmware that does not' 275 @echo ' support passing a device tree directly. Replace <dt> with the' 276 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 277 @echo ' (minus the .dts extension).' 278endef 279 280install: 281 $(Q)$(MAKE) $(build)=$(boot) install 282 283vdso_install: 284ifeq ($(CONFIG_PPC64),y) 285 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 286endif 287 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 288 289archclean: 290 $(Q)$(MAKE) $(clean)=$(boot) 291 292archprepare: checkbin 293 294# Use the file '.tmp_gas_check' for binutils tests, as gas won't output 295# to stdout and these checks are run even on install targets. 296TOUT := .tmp_gas_check 297 298# Check gcc and binutils versions: 299# - gcc-3.4 and binutils-2.14 are a fatal combination 300# - Require gcc 4.0 or above on 64-bit 301# - gcc-4.2.0 has issues compiling modules on 64-bit 302checkbin: 303 @if test "$(call cc-version)" = "0304" ; then \ 304 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \ 305 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \ 306 echo 'correctly with gcc-3.4 and your version of binutils.'; \ 307 echo '*** Please upgrade your binutils or downgrade your gcc'; \ 308 false; \ 309 fi ; \ 310 fi 311 @if test "$(call cc-version)" -lt "0400" \ 312 && test "x${CONFIG_PPC64}" = "xy" ; then \ 313 echo -n "Sorry, GCC v4.0 or above is required to build " ; \ 314 echo "the 64-bit powerpc kernel." ; \ 315 false ; \ 316 fi 317 @if test "$(call cc-fullversion)" = "040200" \ 318 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \ 319 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \ 320 echo 'kernel with modules enabled.' ; \ 321 echo -n '*** Please use a different GCC version or ' ; \ 322 echo 'disable kernel modules' ; \ 323 false ; \ 324 fi 325 326CLEAN_FILES += $(TOUT) 327 328