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Sam Ravnborg74b469f2007-10-25 19:42:04 +02001# Unified Makefile for i386 and x86_64
2
Sam Ravnborg2266cfd2007-10-25 20:31:19 +02003# select defconfig based on actual architecture
Sam Ravnborgd746d642007-11-12 20:14:19 +01004ifeq ($(ARCH),x86)
5 KBUILD_DEFCONFIG := i386_defconfig
6else
7 KBUILD_DEFCONFIG := $(ARCH)_defconfig
8endif
Sam Ravnborg2266cfd2007-10-25 20:31:19 +02009
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010010# BITS is used as extension for files which are available in a 32 bit
11# and a 64 bit version to simplify shared Makefiles.
12# e.g.: obj-y += foo_$(BITS).o
13export BITS
Sam Ravnborg74b469f2007-10-25 19:42:04 +020014
Sam Ravnborgd746d642007-11-12 20:14:19 +010015ifeq ($(CONFIG_X86_32),y)
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010016 BITS := 32
Andreas Herrmann8c6531f2007-11-19 23:58:57 +010017 UTS_MACHINE := i386
Sam Ravnborg4ba7e5c2008-01-30 13:32:23 +010018 CHECKFLAGS += -D__i386__
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010019
Sam Ravnborg4ba7e5c2008-01-30 13:32:23 +010020 biarch := $(call cc-option,-m32)
21 KBUILD_AFLAGS += $(biarch)
22 KBUILD_CFLAGS += $(biarch)
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010023
24 ifdef CONFIG_RELOCATABLE
25 LDFLAGS_vmlinux := --emit-relocs
26 endif
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010027
28 KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return
29
30 # prevent gcc from keeping the stack 16 byte aligned
31 KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
32
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:
Frans Popc7bd0412009-07-23 20:56:27 +020035 KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0400, \
36 $(call cc-option,-fno-unit-at-a-time))
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010037
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 += $(cflags-y)
41
42 # temporary until string.h is fixed
43 KBUILD_CFLAGS += -ffreestanding
Sam Ravnborg74b469f2007-10-25 19:42:04 +020044else
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010045 BITS := 64
Andreas Herrmann8c6531f2007-11-19 23:58:57 +010046 UTS_MACHINE := x86_64
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010047 CHECKFLAGS += -D__x86_64__ -m64
48
49 KBUILD_AFLAGS += -m64
50 KBUILD_CFLAGS += -m64
51
52 # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
53 cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
54 cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
55
56 cflags-$(CONFIG_MCORE2) += \
57 $(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
Tobias Doerffel366d19e2009-08-21 23:06:23 +020058 cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \
59 $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010060 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
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010066 # -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
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010070 # 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
Tejun Heo5d707e92009-02-09 22:17:39 +090073endif
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010074
Tejun Heo5d707e92009-02-09 22:17:39 +090075ifdef CONFIG_CC_STACKPROTECTOR
76 cc_has_sp := $(srctree)/scripts/gcc-x86_$(BITS)-has-stack-protector.sh
basile@opensource.dyc.edu08c2b392010-09-13 06:13:19 -040077 ifeq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
Tejun Heo5d707e92009-02-09 22:17:39 +090078 stackp-y := -fstack-protector
Tejun Heo5d707e92009-02-09 22:17:39 +090079 KBUILD_CFLAGS += $(stackp-y)
80 else
81 $(warning stack protector enabled but no compiler support)
82 endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +020083endif
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010084
Vegard Nossumdfec0722008-04-04 00:51:41 +020085# Don't unroll struct assignments with kmemcheck enabled
86ifeq ($(CONFIG_KMEMCHECK),y)
87 KBUILD_CFLAGS += $(call cc-option,-fno-builtin-memcpy)
88endif
89
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010090# Stackpointer is addressed different for 32 bit and 64 bit x86
91sp-$(CONFIG_X86_32) := esp
92sp-$(CONFIG_X86_64) := rsp
93
94# do binutils support CFI?
95cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1)
96# is .cfi_signal_frame supported too?
97cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1)
Roland McGrath9e565292010-05-13 21:43:03 -070098cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTIONS=1)
H. Peter Anvind7acb922010-10-13 16:00:29 -070099
100# does binutils support specific instructions?
101asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1)
102
103KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr)
104KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr)
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100105
106LDFLAGS := -m elf_$(UTS_MACHINE)
Sam Ravnborg25dfeeb2008-01-30 13:32:21 +0100107
108# Speed up the build
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100109KBUILD_CFLAGS += -pipe
Sam Ravnborg25dfeeb2008-01-30 13:32:21 +0100110# Workaround for a gcc prelease that unfortunately was shipped in a suse release
111KBUILD_CFLAGS += -Wno-sign-compare
112#
113KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
114# prevent gcc from generating any FP code by mistake
115KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100116
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100117KBUILD_CFLAGS += $(mflags-y)
118KBUILD_AFLAGS += $(mflags-y)
119
120###
121# Kernel objects
122
Eric W. Biederman700efc12008-02-23 09:58:20 +0100123head-y := arch/x86/kernel/head_$(BITS).o
124head-y += arch/x86/kernel/head$(BITS).o
Huang, Ying0c51a962008-06-02 14:26:23 +0800125head-y += arch/x86/kernel/head.o
Eric W. Biederman700efc12008-02-23 09:58:20 +0100126head-y += arch/x86/kernel/init_task.o
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100127
128libs-y += arch/x86/lib/
129
Sam Ravnborgd1f0ae52009-04-15 21:34:55 +0200130# See arch/x86/Kbuild for content of core part of the kernel
131core-y += arch/x86/
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100132
133# drivers-y are linked after core-y
134drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
135drivers-$(CONFIG_PCI) += arch/x86/pci/
136
137# must be linked after kernel/
138drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
139
Rafael J. Wysockicf7700f2008-02-09 23:24:09 +0100140# suspend and hibernation support
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100141drivers-$(CONFIG_PM) += arch/x86/power/
Rafael J. Wysockicf7700f2008-02-09 23:24:09 +0100142
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100143drivers-$(CONFIG_FB) += arch/x86/video/
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100144
145####
146# boot loader support. Several targets are kept for legacy purposes
147
148boot := arch/x86/boot
149
H. Peter Anvin1648e4f2009-04-17 10:46:37 -0700150BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage
H. Peter Anvinf9c51072009-03-12 12:50:33 -0700151
152PHONY += bzImage $(BOOT_TARGETS)
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100153
154# Default kernel to build
155all: bzImage
156
157# KBUILD_IMAGE specify target image being built
H. Peter Anvinf9c51072009-03-12 12:50:33 -0700158KBUILD_IMAGE := $(boot)/bzImage
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100159
H. Peter Anvinf9c51072009-03-12 12:50:33 -0700160bzImage: vmlinux
Masami Hiramatsuca0e9ba2009-08-13 16:34:21 -0400161ifeq ($(CONFIG_X86_DECODER_SELFTEST),y)
162 $(Q)$(MAKE) $(build)=arch/x86/tools posttest
163endif
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100164 $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
165 $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
Jan Beulich41b3eae2008-04-22 16:29:26 +0100166 $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100167
H. Peter Anvinf9c51072009-03-12 12:50:33 -0700168$(BOOT_TARGETS): vmlinux
169 $(Q)$(MAKE) $(build)=$(boot) $@
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100170
H. Peter Anvin1648e4f2009-04-17 10:46:37 -0700171PHONY += install
172install:
173 $(Q)$(MAKE) $(build)=$(boot) $@
174
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100175PHONY += vdso_install
176vdso_install:
177 $(Q)$(MAKE) $(build)=arch/x86/vdso $@
178
179archclean:
180 $(Q)rm -rf $(objtree)/arch/i386
181 $(Q)rm -rf $(objtree)/arch/x86_64
182 $(Q)$(MAKE) $(clean)=$(boot)
183
184define archhelp
Andi Kleen37f30e22008-01-30 13:32:49 +0100185 echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)'
186 echo ' install - Install kernel using'
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200187 echo ' (your) ~/bin/$(INSTALLKERNEL) or'
188 echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
Andi Kleen37f30e22008-01-30 13:32:49 +0100189 echo ' install to $$(INSTALL_PATH) and run lilo'
190 echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
191 echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
192 echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'
193 echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)'
194 echo ' bzdisk/fdimage*/isoimage also accept:'
195 echo ' FDARGS="..." arguments for the booted kernel'
196 echo ' FDINITRD=file initrd for the booted kernel'
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100197endef