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) 95 96# Speed up the build 97KBUILD_CFLAGS += -pipe 98# Workaround for a gcc prelease that unfortunately was shipped in a suse release 99KBUILD_CFLAGS += -Wno-sign-compare 100# 101KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 102# prevent gcc from generating any FP code by mistake 103KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,) 104 105### 106# Sub architecture support 107# fcore-y is linked before mcore-y files. 108 109# Default subarch .c files 110mcore-y := arch/x86/mach-default/ 111 112# Voyager subarch support 113mflags-$(CONFIG_X86_VOYAGER) := -Iinclude/asm-x86/mach-voyager 114mcore-$(CONFIG_X86_VOYAGER) := arch/x86/mach-voyager/ 115 116# generic subarchitecture 117mflags-$(CONFIG_X86_GENERICARCH):= -Iinclude/asm-x86/mach-generic 118fcore-$(CONFIG_X86_GENERICARCH) += arch/x86/mach-generic/ 119mcore-$(CONFIG_X86_GENERICARCH) := arch/x86/mach-default/ 120 121# default subarch .h files 122mflags-y += -Iinclude/asm-x86/mach-default 123 124# 64 bit does not support subarch support - clear sub arch variables 125fcore-$(CONFIG_X86_64) := 126mcore-$(CONFIG_X86_64) := 127 128KBUILD_CFLAGS += $(mflags-y) 129KBUILD_AFLAGS += $(mflags-y) 130 131### 132# Kernel objects 133 134head-y := arch/x86/kernel/head_$(BITS).o 135head-y += arch/x86/kernel/head$(BITS).o 136head-y += arch/x86/kernel/head.o 137head-y += arch/x86/kernel/init_task.o 138 139libs-y += arch/x86/lib/ 140 141# Sub architecture files that needs linking first 142core-y += $(fcore-y) 143 144# Xen paravirtualization support 145core-$(CONFIG_XEN) += arch/x86/xen/ 146 147# lguest paravirtualization support 148core-$(CONFIG_LGUEST_GUEST) += arch/x86/lguest/ 149 150core-y += arch/x86/kernel/ 151core-y += arch/x86/mm/ 152 153# Remaining sub architecture files 154core-y += $(mcore-y) 155 156core-y += arch/x86/crypto/ 157core-y += arch/x86/vdso/ 158core-$(CONFIG_IA32_EMULATION) += arch/x86/ia32/ 159 160# drivers-y are linked after core-y 161drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/ 162drivers-$(CONFIG_PCI) += arch/x86/pci/ 163 164# must be linked after kernel/ 165drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/ 166 167# suspend and hibernation support 168drivers-$(CONFIG_PM) += arch/x86/power/ 169 170ifeq ($(CONFIG_X86_32),y) 171drivers-$(CONFIG_FB) += arch/x86/video/ 172endif 173 174#### 175# boot loader support. Several targets are kept for legacy purposes 176 177boot := arch/x86/boot 178 179PHONY += zImage bzImage compressed zlilo bzlilo \ 180 zdisk bzdisk fdimage fdimage144 fdimage288 isoimage install 181 182# Default kernel to build 183all: bzImage 184 185# KBUILD_IMAGE specify target image being built 186 KBUILD_IMAGE := $(boot)/bzImage 187zImage zlilo zdisk: KBUILD_IMAGE := $(boot)/zImage 188 189zImage bzImage: vmlinux 190 $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE) 191 $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot 192 $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@ 193 194compressed: zImage 195 196zlilo bzlilo: vmlinux 197 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zlilo 198 199zdisk bzdisk: vmlinux 200 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zdisk 201 202fdimage fdimage144 fdimage288 isoimage: vmlinux 203 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) $@ 204 205install: 206 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install 207 208PHONY += vdso_install 209vdso_install: 210 $(Q)$(MAKE) $(build)=arch/x86/vdso $@ 211 212archclean: 213 $(Q)rm -rf $(objtree)/arch/i386 214 $(Q)rm -rf $(objtree)/arch/x86_64 215 $(Q)$(MAKE) $(clean)=$(boot) 216 217define archhelp 218 echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)' 219 echo ' install - Install kernel using' 220 echo ' (your) ~/bin/installkernel or' 221 echo ' (distribution) /sbin/installkernel or' 222 echo ' install to $$(INSTALL_PATH) and run lilo' 223 echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' 224 echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' 225 echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)' 226 echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)' 227 echo ' bzdisk/fdimage*/isoimage also accept:' 228 echo ' FDARGS="..." arguments for the booted kernel' 229 echo ' FDINITRD=file initrd for the booted kernel' 230endef 231 232CLEAN_FILES += arch/x86/boot/fdimage \ 233 arch/x86/boot/image.iso \ 234 arch/x86/boot/mtools.conf 235