1 # Unified Makefile for i386 and x86_64
3 # select defconfig based on actual architecture
5 KBUILD_DEFCONFIG := i386_defconfig
7 KBUILD_DEFCONFIG := $(ARCH)_defconfig
10 # BITS is used as extension for files which are available in a 32 bit
11 # and a 64 bit version to simplify shared Makefiles.
12 # e.g.: obj-y += foo_$(BITS).o
15 ifeq ($(CONFIG_X86_32),y)
19 HAS_BIARCH := $(call cc-option-yn, -m32)
20 ifeq ($(HAS_BIARCH),y)
22 LD := $(LD) -m elf_i386
26 ifdef CONFIG_RELOCATABLE
27 LDFLAGS_vmlinux := --emit-relocs
29 CHECKFLAGS += -D__i386__
31 KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return
33 # prevent gcc from keeping the stack 16 byte aligned
34 KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
36 # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
37 # a lot more stack due to the lack of sharing of stacklots:
38 KBUILD_CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then \
39 echo $(call cc-option,-fno-unit-at-a-time); fi ;)
41 # CPU-specific tuning. Anything which can be shared with UML should go here.
42 include $(srctree)/arch/x86/Makefile_32.cpu
43 KBUILD_CFLAGS += $(cflags-y)
45 # temporary until string.h is fixed
46 KBUILD_CFLAGS += -ffreestanding
50 CHECKFLAGS += -D__x86_64__ -m64
55 # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
56 cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
57 cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
59 cflags-$(CONFIG_MCORE2) += \
60 $(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
61 cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
62 KBUILD_CFLAGS += $(cflags-y)
64 KBUILD_CFLAGS += -mno-red-zone
65 KBUILD_CFLAGS += -mcmodel=kernel
67 # -funit-at-a-time shrinks the kernel .text considerably
68 # unfortunately it makes reading oopses harder.
69 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
71 # this works around some issues with generating unwind tables in older gccs
72 # newer gccs do it by default
73 KBUILD_CFLAGS += -maccumulate-outgoing-args
75 stackp := $(CONFIG_SHELL) $(srctree)/scripts/gcc-x86_64-has-stack-protector.sh
76 stackp-$(CONFIG_CC_STACKPROTECTOR) := $(shell $(stackp) \
77 "$(CC)" -fstack-protector )
78 stackp-$(CONFIG_CC_STACKPROTECTOR_ALL) += $(shell $(stackp) \
79 "$(CC)" -fstack-protector-all )
81 KBUILD_CFLAGS += $(stackp-y)
84 # Stackpointer is addressed different for 32 bit and 64 bit x86
85 sp-$(CONFIG_X86_32) := esp
86 sp-$(CONFIG_X86_64) := rsp
88 # do binutils support CFI?
89 cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1)
90 # is .cfi_signal_frame supported too?
91 cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1)
92 KBUILD_AFLAGS += $(cfi) $(cfi-sigframe)
93 KBUILD_CFLAGS += $(cfi) $(cfi-sigframe)
95 LDFLAGS := -m elf_$(UTS_MACHINE)
96 OBJCOPYFLAGS := -O binary -R .note -R .comment -S
99 KBUILD_CFLAGS += -pipe
100 # Workaround for a gcc prelease that unfortunately was shipped in a suse release
101 KBUILD_CFLAGS += -Wno-sign-compare
103 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) := -Iinclude/asm-x86/mach-voyager
116 mcore-$(CONFIG_X86_VOYAGER) := arch/x86/mach-voyager/
118 # VISWS subarch support
119 mflags-$(CONFIG_X86_VISWS) := -Iinclude/asm-x86/mach-visws
120 mcore-$(CONFIG_X86_VISWS) := arch/x86/mach-visws/
122 # NUMAQ subarch support
123 mflags-$(CONFIG_X86_NUMAQ) := -Iinclude/asm-x86/mach-numaq
124 mcore-$(CONFIG_X86_NUMAQ) := arch/x86/mach-default/
126 # BIGSMP subarch support
127 mflags-$(CONFIG_X86_BIGSMP) := -Iinclude/asm-x86/mach-bigsmp
128 mcore-$(CONFIG_X86_BIGSMP) := arch/x86/mach-default/
130 #Summit subarch support
131 mflags-$(CONFIG_X86_SUMMIT) := -Iinclude/asm-x86/mach-summit
132 mcore-$(CONFIG_X86_SUMMIT) := arch/x86/mach-default/
134 # generic subarchitecture
135 mflags-$(CONFIG_X86_GENERICARCH):= -Iinclude/asm-x86/mach-generic
136 fcore-$(CONFIG_X86_GENERICARCH) += arch/x86/mach-generic/
137 mcore-$(CONFIG_X86_GENERICARCH) := arch/x86/mach-default/
140 # ES7000 subarch support
141 mflags-$(CONFIG_X86_ES7000) := -Iinclude/asm-x86/mach-es7000
142 fcore-$(CONFIG_X86_ES7000) := arch/x86/mach-es7000/
143 mcore-$(CONFIG_X86_ES7000) := arch/x86/mach-default/
145 # default subarch .h files
146 mflags-y += -Iinclude/asm-x86/mach-default
148 # 64 bit does not support subarch support - clear sub arch variables
149 fcore-$(CONFIG_X86_64) :=
150 mcore-$(CONFIG_X86_64) :=
151 mflags-$(CONFIG_X86_64) :=
153 KBUILD_CFLAGS += $(mflags-y)
154 KBUILD_AFLAGS += $(mflags-y)
159 head-y := arch/x86/kernel/head_$(BITS).o
160 head-$(CONFIG_X86_64) += arch/x86/kernel/head64.o
161 head-y += arch/x86/kernel/init_task.o
163 libs-y += arch/x86/lib/
165 # Sub architecture files that needs linking first
168 # Xen paravirtualization support
169 core-$(CONFIG_XEN) += arch/x86/xen/
171 # lguest paravirtualization support
172 core-$(CONFIG_LGUEST_GUEST) += arch/x86/lguest/
174 core-y += arch/x86/kernel/
175 core-y += arch/x86/mm/
177 # Remaining sub architecture files
180 core-y += arch/x86/crypto/
181 core-y += arch/x86/vdso/
182 core-$(CONFIG_IA32_EMULATION) += arch/x86/ia32/
184 # drivers-y are linked after core-y
185 drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
186 drivers-$(CONFIG_PCI) += arch/x86/pci/
188 # must be linked after kernel/
189 drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
191 ifeq ($(CONFIG_X86_32),y)
192 drivers-$(CONFIG_PM) += arch/x86/power/
193 drivers-$(CONFIG_FB) += arch/x86/video/
197 # boot loader support. Several targets are kept for legacy purposes
199 boot := arch/x86/boot
201 PHONY += zImage bzImage compressed zlilo bzlilo \
202 zdisk bzdisk fdimage fdimage144 fdimage288 isoimage install
204 # Default kernel to build
207 # KBUILD_IMAGE specify target image being built
208 KBUILD_IMAGE := $(boot)/bzImage
209 zImage zlilo zdisk: KBUILD_IMAGE := arch/x86/boot/zImage
211 zImage bzImage: vmlinux
212 $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
213 $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
214 $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/bzImage
218 zlilo bzlilo: vmlinux
219 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zlilo
221 zdisk bzdisk: vmlinux
222 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zdisk
224 fdimage fdimage144 fdimage288 isoimage: vmlinux
225 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) $@
227 install: vdso_install
228 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install
230 PHONY += vdso_install
232 $(Q)$(MAKE) $(build)=arch/x86/vdso $@
235 $(Q)rm -rf $(objtree)/arch/i386
236 $(Q)rm -rf $(objtree)/arch/x86_64
237 $(Q)$(MAKE) $(clean)=$(boot)
240 echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)'
241 echo ' install - Install kernel using'
242 echo ' (your) ~/bin/installkernel or'
243 echo ' (distribution) /sbin/installkernel or'
244 echo ' install to $$(INSTALL_PATH) and run lilo'
245 echo ' bzdisk - Create a boot floppy in /dev/fd0'
246 echo ' fdimage - Create a boot floppy image'
247 echo ' isoimage - Create a boot CD-ROM image'
250 CLEAN_FILES += arch/x86/boot/fdimage \
251 arch/x86/boot/image.iso \
252 arch/x86/boot/mtools.conf