sysrq, intel_fb: fix sysrq g collision
[linux-2.6/mini2440.git] / arch / x86 / Makefile
blob8c86b72afdc2d39bc8957692e35335ebabae82bc
1 # Unified Makefile for i386 and x86_64
3 # select defconfig based on actual architecture
4 ifeq ($(ARCH),x86)
5 KBUILD_DEFCONFIG := i386_defconfig
6 else
7 KBUILD_DEFCONFIG := $(ARCH)_defconfig
8 endif
10 core-$(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_$(BITS).o
15 export BITS
17 ifeq ($(CONFIG_X86_32),y)
18 BITS := 32
19 UTS_MACHINE := i386
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
28 endif
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 += $(cflags-y)
44 # temporary until string.h is fixed
45 KBUILD_CFLAGS += -ffreestanding
46 else
47 BITS := 64
48 UTS_MACHINE := x86_64
49 CHECKFLAGS += -D__x86_64__ -m64
51 KBUILD_AFLAGS += -m64
52 KBUILD_CFLAGS += -m64
54 # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
55 cflags-$(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
73 endif
75 ifdef CONFIG_CC_STACKPROTECTOR
76 cc_has_sp := $(srctree)/scripts/gcc-x86_$(BITS)-has-stack-protector.sh
77 ifeq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC)),y)
78 stackp-y := -fstack-protector
79 stackp-$(CONFIG_CC_STACKPROTECTOR_ALL) += -fstack-protector-all
80 KBUILD_CFLAGS += $(stackp-y)
81 else
82 $(warning stack protector enabled but no compiler support)
83 endif
84 endif
86 # Stackpointer is addressed different for 32 bit and 64 bit x86
87 sp-$(CONFIG_X86_32) := esp
88 sp-$(CONFIG_X86_64) := rsp
90 # do binutils support CFI?
91 cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1)
92 # is .cfi_signal_frame supported too?
93 cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1)
94 KBUILD_AFLAGS += $(cfi) $(cfi-sigframe)
95 KBUILD_CFLAGS += $(cfi) $(cfi-sigframe)
97 LDFLAGS := -m elf_$(UTS_MACHINE)
99 # Speed up the build
100 KBUILD_CFLAGS += -pipe
101 # Workaround for a gcc prelease that unfortunately was shipped in a suse release
102 KBUILD_CFLAGS += -Wno-sign-compare
104 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
105 # prevent gcc from generating any FP code by mistake
106 KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
108 KBUILD_CFLAGS += $(mflags-y)
109 KBUILD_AFLAGS += $(mflags-y)
112 # Kernel objects
114 head-y := arch/x86/kernel/head_$(BITS).o
115 head-y += arch/x86/kernel/head$(BITS).o
116 head-y += arch/x86/kernel/head.o
117 head-y += arch/x86/kernel/init_task.o
119 libs-y += arch/x86/lib/
121 # Sub architecture files that needs linking first
122 core-y += $(fcore-y)
124 # Xen paravirtualization support
125 core-$(CONFIG_XEN) += arch/x86/xen/
127 # lguest paravirtualization support
128 core-$(CONFIG_LGUEST_GUEST) += arch/x86/lguest/
130 core-y += arch/x86/kernel/
131 core-y += arch/x86/mm/
133 core-y += arch/x86/crypto/
134 core-y += arch/x86/vdso/
135 core-$(CONFIG_IA32_EMULATION) += arch/x86/ia32/
137 # drivers-y are linked after core-y
138 drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
139 drivers-$(CONFIG_PCI) += arch/x86/pci/
141 # must be linked after kernel/
142 drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
144 # suspend and hibernation support
145 drivers-$(CONFIG_PM) += arch/x86/power/
147 ifeq ($(CONFIG_X86_32),y)
148 drivers-$(CONFIG_FB) += arch/x86/video/
149 endif
151 ####
152 # boot loader support. Several targets are kept for legacy purposes
154 boot := arch/x86/boot
156 BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage
158 PHONY += bzImage $(BOOT_TARGETS)
160 # Default kernel to build
161 all: bzImage
163 # KBUILD_IMAGE specify target image being built
164 KBUILD_IMAGE := $(boot)/bzImage
166 bzImage: vmlinux
167 $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
168 $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
169 $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@
171 $(BOOT_TARGETS): vmlinux
172 $(Q)$(MAKE) $(build)=$(boot) $@
174 PHONY += install
175 install:
176 $(Q)$(MAKE) $(build)=$(boot) $@
178 PHONY += vdso_install
179 vdso_install:
180 $(Q)$(MAKE) $(build)=arch/x86/vdso $@
182 archclean:
183 $(Q)rm -rf $(objtree)/arch/i386
184 $(Q)rm -rf $(objtree)/arch/x86_64
185 $(Q)$(MAKE) $(clean)=$(boot)
187 define archhelp
188 echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)'
189 echo ' install - Install kernel using'
190 echo ' (your) ~/bin/installkernel or'
191 echo ' (distribution) /sbin/installkernel or'
192 echo ' install to $$(INSTALL_PATH) and run lilo'
193 echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
194 echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
195 echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'
196 echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)'
197 echo ' bzdisk/fdimage*/isoimage also accept:'
198 echo ' FDARGS="..." arguments for the booted kernel'
199 echo ' FDINITRD=file initrd for the booted kernel'
200 endef