1 # Unified Makefile for i386 and x86_64
3 # select defconfig based on actual architecture
5 KBUILD_DEFCONFIG := i386_defconfig
7 KBUILD_DEFCONFIG := $(ARCH)_defconfig
10 core-$(CONFIG_KVM) += arch/x86/kvm/
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_$(BITS).o
17 ifeq ($(CONFIG_X86_32),y)
20 CHECKFLAGS += -D__i386__
22 biarch := $(call cc-option,-m32)
23 KBUILD_AFLAGS += $(biarch)
24 KBUILD_CFLAGS += $(biarch)
26 ifdef CONFIG_RELOCATABLE
27 LDFLAGS_vmlinux := --emit-relocs
30 KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return
32 # prevent gcc from keeping the stack 16 byte aligned
33 KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
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 ;)
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 += $(cflags-y)
44 # temporary until string.h is fixed
45 KBUILD_CFLAGS += -ffreestanding
49 CHECKFLAGS += -D__x86_64__ -m64
54 # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
55 cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
56 cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
58 cflags-$(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)
63 KBUILD_CFLAGS += -mno-red-zone
64 KBUILD_CFLAGS += -mcmodel=kernel
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)
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
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 )
80 KBUILD_CFLAGS += $(stackp-y)
83 # Stackpointer is addressed different for 32 bit and 64 bit x86
84 sp-$(CONFIG_X86_32) := esp
85 sp-$(CONFIG_X86_64) := rsp
87 # do binutils support CFI?
88 cfi := $(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?
90 cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1)
91 KBUILD_AFLAGS += $(cfi) $(cfi-sigframe)
92 KBUILD_CFLAGS += $(cfi) $(cfi-sigframe)
94 LDFLAGS := -m elf_$(UTS_MACHINE)
97 KBUILD_CFLAGS += -pipe
98 # Workaround for a gcc prelease that unfortunately was shipped in a suse release
99 KBUILD_CFLAGS += -Wno-sign-compare
101 ifneq ($(CONFIG_UNWIND_INFO),y)
102 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
104 # prevent gcc from generating any FP code by mistake
105 KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
108 # Sub architecture support
109 # fcore-y is linked before mcore-y files.
111 # Default subarch .c files
112 mcore-y := arch/x86/mach-default/
114 # Voyager subarch support
115 mflags-$(CONFIG_X86_VOYAGER) := -Iarch/x86/include/asm/mach-voyager
116 mcore-$(CONFIG_X86_VOYAGER) := arch/x86/mach-voyager/
118 # generic subarchitecture
119 mflags-$(CONFIG_X86_GENERICARCH):= -Iarch/x86/include/asm/mach-generic
120 fcore-$(CONFIG_X86_GENERICARCH) += arch/x86/mach-generic/
121 mcore-$(CONFIG_X86_GENERICARCH) := arch/x86/mach-default/
123 # default subarch .h files
124 mflags-y += -Iarch/x86/include/asm/mach-default
126 # 64 bit does not support subarch support - clear sub arch variables
127 fcore-$(CONFIG_X86_64) :=
128 mcore-$(CONFIG_X86_64) :=
130 KBUILD_CFLAGS += $(mflags-y)
131 KBUILD_AFLAGS += $(mflags-y)
136 head-y := arch/x86/kernel/head_$(BITS).o
137 head-y += arch/x86/kernel/head$(BITS).o
138 head-y += arch/x86/kernel/head.o
139 head-y += arch/x86/kernel/init_task.o
141 libs-y += arch/x86/lib/
143 # Sub architecture files that needs linking first
146 # Xen paravirtualization support
147 core-$(CONFIG_XEN) += arch/x86/xen/
149 # lguest paravirtualization support
150 core-$(CONFIG_LGUEST_GUEST) += arch/x86/lguest/
152 core-y += arch/x86/kernel/
153 core-y += arch/x86/mm/
155 core-$(CONFIG_PERFMON) += arch/x86/perfmon/
157 # Remaining sub architecture files
160 core-y += arch/x86/crypto/
161 core-y += arch/x86/vdso/
162 core-$(CONFIG_IA32_EMULATION) += arch/x86/ia32/
164 # drivers-y are linked after core-y
165 drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
166 drivers-$(CONFIG_PCI) += arch/x86/pci/
168 # must be linked after kernel/
169 drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
171 # suspend and hibernation support
172 drivers-$(CONFIG_PM) += arch/x86/power/
174 ifeq ($(CONFIG_X86_32),y)
175 drivers-$(CONFIG_FB) += arch/x86/video/
179 drivers-$(CONFIG_KDB) += arch/x86/kdb/
182 # boot loader support. Several targets are kept for legacy purposes
184 boot := arch/x86/boot
186 PHONY += zImage bzImage compressed zlilo bzlilo \
187 zdisk bzdisk fdimage fdimage144 fdimage288 isoimage install
189 # Default kernel to build
192 # KBUILD_IMAGE specify target image being built
193 KBUILD_IMAGE := $(boot)/bzImage
194 zImage zlilo zdisk: KBUILD_IMAGE := $(boot)/zImage
196 zImage bzImage: vmlinux
197 $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
198 $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
199 $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@
203 zlilo bzlilo: vmlinux
204 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zlilo
206 zdisk bzdisk: vmlinux
207 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zdisk
209 fdimage fdimage144 fdimage288 isoimage: vmlinux
210 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) $@
213 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install
215 PHONY += vdso_install
217 $(Q)$(MAKE) $(build)=arch/x86/vdso $@
220 $(Q)rm -rf $(objtree)/arch/i386
221 $(Q)rm -rf $(objtree)/arch/x86_64
222 $(Q)$(MAKE) $(clean)=$(boot)
225 echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)'
226 echo ' install - Install kernel using'
227 echo ' (your) ~/bin/installkernel or'
228 echo ' (distribution) /sbin/installkernel or'
229 echo ' install to $$(INSTALL_PATH) and run lilo'
230 echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
231 echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
232 echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'
233 echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)'
234 echo ' bzdisk/fdimage*/isoimage also accept:'
235 echo ' FDARGS="..." arguments for the booted kernel'
236 echo ' FDINITRD=file initrd for the booted kernel'
239 CLEAN_FILES += arch/x86/boot/fdimage \
240 arch/x86/boot/image.iso \
241 arch/x86/boot/mtools.conf