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)
18 CHECKFLAGS += -D__i386__
20 biarch := $(call cc-option,-m32)
21 KBUILD_AFLAGS += $(biarch)
22 KBUILD_CFLAGS += $(biarch)
24 ifdef CONFIG_RELOCATABLE
25 LDFLAGS_vmlinux := --emit-relocs
28 KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return
30 # prevent gcc from keeping the stack 16 byte aligned
31 KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
33 # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
34 # a lot more stack due to the lack of sharing of stacklots:
35 KBUILD_CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then \
36 echo $(call cc-option,-fno-unit-at-a-time); fi ;)
38 # CPU-specific tuning. Anything which can be shared with UML should go here.
39 include $(srctree)/arch/x86/Makefile_32.cpu
40 KBUILD_CFLAGS += $(cflags-y)
42 # temporary until string.h is fixed
43 KBUILD_CFLAGS += -ffreestanding
47 CHECKFLAGS += -D__x86_64__ -m64
52 # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
53 cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
54 cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
56 cflags-$(CONFIG_MCORE2) += \
57 $(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
58 cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
59 KBUILD_CFLAGS += $(cflags-y)
61 KBUILD_CFLAGS += -mno-red-zone
62 KBUILD_CFLAGS += -mcmodel=kernel
64 # -funit-at-a-time shrinks the kernel .text considerably
65 # unfortunately it makes reading oopses harder.
66 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
68 # this works around some issues with generating unwind tables in older gccs
69 # newer gccs do it by default
70 KBUILD_CFLAGS += -maccumulate-outgoing-args
72 stackp := $(CONFIG_SHELL) $(srctree)/scripts/gcc-x86_64-has-stack-protector.sh
73 stackp-$(CONFIG_CC_STACKPROTECTOR) := $(shell $(stackp) \
74 "$(CC)" -fstack-protector )
75 stackp-$(CONFIG_CC_STACKPROTECTOR_ALL) += $(shell $(stackp) \
76 "$(CC)" -fstack-protector-all )
78 KBUILD_CFLAGS += $(stackp-y)
81 # Stackpointer is addressed different for 32 bit and 64 bit x86
82 sp-$(CONFIG_X86_32) := esp
83 sp-$(CONFIG_X86_64) := rsp
85 # do binutils support CFI?
86 cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1)
87 # is .cfi_signal_frame supported too?
88 cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1)
89 KBUILD_AFLAGS += $(cfi) $(cfi-sigframe)
90 KBUILD_CFLAGS += $(cfi) $(cfi-sigframe)
92 LDFLAGS := -m elf_$(UTS_MACHINE)
93 OBJCOPYFLAGS := -O binary -R .note -R .comment -S
96 KBUILD_CFLAGS += -pipe
97 # Workaround for a gcc prelease that unfortunately was shipped in a suse release
98 KBUILD_CFLAGS += -Wno-sign-compare
100 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
101 # prevent gcc from generating any FP code by mistake
102 KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
105 # Sub architecture support
106 # fcore-y is linked before mcore-y files.
108 # Default subarch .c files
109 mcore-y := arch/x86/mach-default/
111 # Voyager subarch support
112 mflags-$(CONFIG_X86_VOYAGER) := -Iinclude/asm-x86/mach-voyager
113 mcore-$(CONFIG_X86_VOYAGER) := arch/x86/mach-voyager/
115 # VISWS subarch support
116 mflags-$(CONFIG_X86_VISWS) := -Iinclude/asm-x86/mach-visws
117 mcore-$(CONFIG_X86_VISWS) := arch/x86/mach-visws/
119 # NUMAQ subarch support
120 mflags-$(CONFIG_X86_NUMAQ) := -Iinclude/asm-x86/mach-numaq
121 mcore-$(CONFIG_X86_NUMAQ) := arch/x86/mach-default/
123 # BIGSMP subarch support
124 mflags-$(CONFIG_X86_BIGSMP) := -Iinclude/asm-x86/mach-bigsmp
125 mcore-$(CONFIG_X86_BIGSMP) := arch/x86/mach-default/
127 #Summit subarch support
128 mflags-$(CONFIG_X86_SUMMIT) := -Iinclude/asm-x86/mach-summit
129 mcore-$(CONFIG_X86_SUMMIT) := arch/x86/mach-default/
131 # generic subarchitecture
132 mflags-$(CONFIG_X86_GENERICARCH):= -Iinclude/asm-x86/mach-generic
133 fcore-$(CONFIG_X86_GENERICARCH) += arch/x86/mach-generic/
134 mcore-$(CONFIG_X86_GENERICARCH) := arch/x86/mach-default/
137 # ES7000 subarch support
138 mflags-$(CONFIG_X86_ES7000) := -Iinclude/asm-x86/mach-es7000
139 fcore-$(CONFIG_X86_ES7000) := arch/x86/mach-es7000/
140 mcore-$(CONFIG_X86_ES7000) := arch/x86/mach-default/
142 # default subarch .h files
143 mflags-y += -Iinclude/asm-x86/mach-default
145 # 64 bit does not support subarch support - clear sub arch variables
146 fcore-$(CONFIG_X86_64) :=
147 mcore-$(CONFIG_X86_64) :=
148 mflags-$(CONFIG_X86_64) :=
150 KBUILD_CFLAGS += $(mflags-y)
151 KBUILD_AFLAGS += $(mflags-y)
156 head-y := arch/x86/kernel/head_$(BITS).o
157 head-$(CONFIG_X86_64) += arch/x86/kernel/head64.o
158 head-y += arch/x86/kernel/init_task.o
160 libs-y += arch/x86/lib/
162 # Sub architecture files that needs linking first
165 # Xen paravirtualization support
166 core-$(CONFIG_XEN) += arch/x86/xen/
168 # lguest paravirtualization support
169 core-$(CONFIG_LGUEST_GUEST) += arch/x86/lguest/
171 core-y += arch/x86/kernel/
172 core-y += arch/x86/mm/
174 # Remaining sub architecture files
177 core-y += arch/x86/crypto/
178 core-y += arch/x86/vdso/
179 core-$(CONFIG_IA32_EMULATION) += arch/x86/ia32/
181 # drivers-y are linked after core-y
182 drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
183 drivers-$(CONFIG_PCI) += arch/x86/pci/
185 # must be linked after kernel/
186 drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
188 ifeq ($(CONFIG_X86_32),y)
189 drivers-$(CONFIG_PM) += arch/x86/power/
190 drivers-$(CONFIG_FB) += arch/x86/video/
194 # boot loader support. Several targets are kept for legacy purposes
196 boot := arch/x86/boot
198 PHONY += zImage bzImage compressed zlilo bzlilo \
199 zdisk bzdisk fdimage fdimage144 fdimage288 isoimage install
201 # Default kernel to build
204 # KBUILD_IMAGE specify target image being built
205 KBUILD_IMAGE := $(boot)/bzImage
206 zImage zlilo zdisk: KBUILD_IMAGE := arch/x86/boot/zImage
208 zImage bzImage: vmlinux
209 $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
210 $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
211 $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/bzImage
215 zlilo bzlilo: vmlinux
216 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zlilo
218 zdisk bzdisk: vmlinux
219 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zdisk
221 fdimage fdimage144 fdimage288 isoimage: vmlinux
222 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) $@
224 install: vdso_install
225 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install
227 PHONY += vdso_install
229 $(Q)$(MAKE) $(build)=arch/x86/vdso $@
232 $(Q)rm -rf $(objtree)/arch/i386
233 $(Q)rm -rf $(objtree)/arch/x86_64
234 $(Q)$(MAKE) $(clean)=$(boot)
237 echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)'
238 echo ' install - Install kernel using'
239 echo ' (your) ~/bin/installkernel or'
240 echo ' (distribution) /sbin/installkernel or'
241 echo ' install to $$(INSTALL_PATH) and run lilo'
242 echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
243 echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
244 echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'
245 echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)'
246 echo ' bzdisk/fdimage*/isoimage also accept:'
247 echo ' FDARGS="..." arguments for the booted kernel'
248 echo ' FDINITRD=file initrd for the booted kernel'
251 CLEAN_FILES += arch/x86/boot/fdimage \
252 arch/x86/boot/image.iso \
253 arch/x86/boot/mtools.conf