1# Unified Makefile for i386 and x86_64 2 3# select defconfig based on actual architecture 4ifeq ($(ARCH),x86) 5 KBUILD_DEFCONFIG := i386_defconfig 6else 7 KBUILD_DEFCONFIG := $(ARCH)_defconfig 8endif 9 10core-$(CONFIG_KVM) += arch/x86/kvm/ 11 12# BITS is used as extension for files which are available in a 32 bit 13# and a 64 bit version to simplify shared Makefiles. 14# e.g.: obj-y += foo_$(BITS).o 15export BITS 16 17ifeq ($(CONFIG_X86_32),y) 18 BITS := 32 19 UTS_MACHINE := i386 20 CHECKFLAGS += -D__i386__ 21 22 biarch := $(call cc-option,-m32) 23 KBUILD_AFLAGS += $(biarch) 24 KBUILD_CFLAGS += $(biarch) 25 26 ifdef CONFIG_RELOCATABLE 27 LDFLAGS_vmlinux := --emit-relocs 28 endif 29 30 KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return 31 32 # prevent gcc from keeping the stack 16 byte aligned 33 KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2) 34 35 # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use 36 # a lot more stack due to the lack of sharing of stacklots: 37 KBUILD_CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then \ 38 echo $(call cc-option,-fno-unit-at-a-time); fi ;) 39 40 # CPU-specific tuning. Anything which can be shared with UML should go here. 41 include $(srctree)/arch/x86/Makefile_32.cpu 42 KBUILD_CFLAGS += $(cflags-y) 43 44 # temporary until string.h is fixed 45 KBUILD_CFLAGS += -ffreestanding 46else 47 BITS := 64 48 UTS_MACHINE := x86_64 49 CHECKFLAGS += -D__x86_64__ -m64 50 51 KBUILD_AFLAGS += -m64 52 KBUILD_CFLAGS += -m64 53 54 # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu) 55 cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8) 56 cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona) 57 58 cflags-$(CONFIG_MCORE2) += \ 59 $(call cc-option,-march=core2,$(call cc-option,-mtune=generic)) 60 cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic) 61 KBUILD_CFLAGS += $(cflags-y) 62 63 KBUILD_CFLAGS += -mno-red-zone 64 KBUILD_CFLAGS += -mcmodel=kernel 65 66 # -funit-at-a-time shrinks the kernel .text considerably 67 # unfortunately it makes reading oopses harder. 68 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) 69 70 # this works around some issues with generating unwind tables in older gccs 71 # newer gccs do it by default 72 KBUILD_CFLAGS += -maccumulate-outgoing-args 73 74 stackp := $(CONFIG_SHELL) $(srctree)/scripts/gcc-x86_64-has-stack-protector.sh 75 stackp-$(CONFIG_CC_STACKPROTECTOR) := $(shell $(stackp) \ 76 "$(CC)" -fstack-protector ) 77 stackp-$(CONFIG_CC_STACKPROTECTOR_ALL) += $(shell $(stackp) \ 78 "$(CC)" -fstack-protector-all ) 79 80 KBUILD_CFLAGS += $(stackp-y) 81endif 82 83# Stackpointer is addressed different for 32 bit and 64 bit x86 84sp-$(CONFIG_X86_32) := esp 85sp-$(CONFIG_X86_64) := rsp 86 87# do binutils support CFI? 88cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1) 89# is .cfi_signal_frame supported too? 90cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1) 91KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) 92KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) 93 94LDFLAGS := -m elf_$(UTS_MACHINE) 95OBJCOPYFLAGS := -O binary -R .note -R .comment -S 96 97# Speed up the build 98KBUILD_CFLAGS += -pipe 99# Workaround for a gcc prelease that unfortunately was shipped in a suse release 100KBUILD_CFLAGS += -Wno-sign-compare 101# 102KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 103# prevent gcc from generating any FP code by mistake 104KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,) 105 106### 107# Sub architecture support 108# fcore-y is linked before mcore-y files. 109 110# Default subarch .c files 111mcore-y := arch/x86/mach-default/ 112 113# Voyager subarch support 114mflags-$(CONFIG_X86_VOYAGER) := -Iinclude/asm-x86/mach-voyager 115mcore-$(CONFIG_X86_VOYAGER) := arch/x86/mach-voyager/ 116 117# VISWS subarch support 118mflags-$(CONFIG_X86_VISWS) := -Iinclude/asm-x86/mach-visws 119mcore-$(CONFIG_X86_VISWS) := arch/x86/mach-visws/ 120 121# NUMAQ subarch support 122mflags-$(CONFIG_X86_NUMAQ) := -Iinclude/asm-x86/mach-numaq 123mcore-$(CONFIG_X86_NUMAQ) := arch/x86/mach-default/ 124 125# BIGSMP subarch support 126mflags-$(CONFIG_X86_BIGSMP) := -Iinclude/asm-x86/mach-bigsmp 127mcore-$(CONFIG_X86_BIGSMP) := arch/x86/mach-default/ 128 129#Summit subarch support 130mflags-$(CONFIG_X86_SUMMIT) := -Iinclude/asm-x86/mach-summit 131mcore-$(CONFIG_X86_SUMMIT) := arch/x86/mach-default/ 132 133# generic subarchitecture 134mflags-$(CONFIG_X86_GENERICARCH):= -Iinclude/asm-x86/mach-generic 135fcore-$(CONFIG_X86_GENERICARCH) += arch/x86/mach-generic/ 136mcore-$(CONFIG_X86_GENERICARCH) := arch/x86/mach-default/ 137 138 139# ES7000 subarch support 140mflags-$(CONFIG_X86_ES7000) := -Iinclude/asm-x86/mach-es7000 141fcore-$(CONFIG_X86_ES7000) := arch/x86/mach-es7000/ 142mcore-$(CONFIG_X86_ES7000) := arch/x86/mach-default/ 143 144# RDC R-321x subarch support 145mflags-$(CONFIG_X86_RDC321X) := -Iinclude/asm-x86/mach-rdc321x 146mcore-$(CONFIG_X86_RDC321X) := arch/x86/mach-default/ 147core-$(CONFIG_X86_RDC321X) += arch/x86/mach-rdc321x/ 148 149# default subarch .h files 150mflags-y += -Iinclude/asm-x86/mach-default 151 152# 64 bit does not support subarch support - clear sub arch variables 153fcore-$(CONFIG_X86_64) := 154mcore-$(CONFIG_X86_64) := 155mflags-$(CONFIG_X86_64) := 156 157KBUILD_CFLAGS += $(mflags-y) 158KBUILD_AFLAGS += $(mflags-y) 159 160### 161# Kernel objects 162 163head-y := arch/x86/kernel/head_$(BITS).o 164head-$(CONFIG_X86_64) += arch/x86/kernel/head64.o 165head-y += arch/x86/kernel/init_task.o 166 167libs-y += arch/x86/lib/ 168 169# Sub architecture files that needs linking first 170core-y += $(fcore-y) 171 172# Xen paravirtualization support 173core-$(CONFIG_XEN) += arch/x86/xen/ 174 175# lguest paravirtualization support 176core-$(CONFIG_LGUEST_GUEST) += arch/x86/lguest/ 177 178core-y += arch/x86/kernel/ 179core-y += arch/x86/mm/ 180 181# Remaining sub architecture files 182core-y += $(mcore-y) 183 184core-y += arch/x86/crypto/ 185core-y += arch/x86/vdso/ 186core-$(CONFIG_IA32_EMULATION) += arch/x86/ia32/ 187 188# drivers-y are linked after core-y 189drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/ 190drivers-$(CONFIG_PCI) += arch/x86/pci/ 191 192# must be linked after kernel/ 193drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/ 194 195ifeq ($(CONFIG_X86_32),y) 196drivers-$(CONFIG_PM) += arch/x86/power/ 197drivers-$(CONFIG_FB) += arch/x86/video/ 198endif 199 200#### 201# boot loader support. Several targets are kept for legacy purposes 202 203boot := arch/x86/boot 204 205PHONY += zImage bzImage compressed zlilo bzlilo \ 206 zdisk bzdisk fdimage fdimage144 fdimage288 isoimage install 207 208# Default kernel to build 209all: bzImage 210 211# KBUILD_IMAGE specify target image being built 212 KBUILD_IMAGE := $(boot)/bzImage 213zImage zlilo zdisk: KBUILD_IMAGE := arch/x86/boot/zImage 214 215zImage bzImage: vmlinux 216 $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE) 217 $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot 218 $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/bzImage 219 220compressed: zImage 221 222zlilo bzlilo: vmlinux 223 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zlilo 224 225zdisk bzdisk: vmlinux 226 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zdisk 227 228fdimage fdimage144 fdimage288 isoimage: vmlinux 229 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) $@ 230 231install: vdso_install 232 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install 233 234PHONY += vdso_install 235vdso_install: 236 $(Q)$(MAKE) $(build)=arch/x86/vdso $@ 237 238archclean: 239 $(Q)rm -rf $(objtree)/arch/i386 240 $(Q)rm -rf $(objtree)/arch/x86_64 241 $(Q)$(MAKE) $(clean)=$(boot) 242 243define archhelp 244 echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)' 245 echo ' install - Install kernel using' 246 echo ' (your) ~/bin/installkernel or' 247 echo ' (distribution) /sbin/installkernel or' 248 echo ' install to $$(INSTALL_PATH) and run lilo' 249 echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' 250 echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' 251 echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)' 252 echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)' 253 echo ' bzdisk/fdimage*/isoimage also accept:' 254 echo ' FDARGS="..." arguments for the booted kernel' 255 echo ' FDINITRD=file initrd for the booted kernel' 256endef 257 258CLEAN_FILES += arch/x86/boot/fdimage \ 259 arch/x86/boot/image.iso \ 260 arch/x86/boot/mtools.conf 261