x86: move i386 and x86_64 Makefiles to arch/x86

Moving the ARCH specific Makefiles for i386 and x86_64
required a litle bit tweaking in the top-lvel Makefile.

SRCARCH is now set in the top-level Makefile
because we need this info to include the correct
arch Makefile.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

1 files changed, 175 insertions, 0 deletions

diff --git a/arch/x86/Makefile_32 b/arch/x86/Makefile_32
new file mode 100644
index 000000000000..346ac0766875
--- /dev/null
+++ b/arch/x86/Makefile_32
@@ -0,0 +1,175 @@
+#
+# i386 Makefile
+#
+# This file is included by the global makefile so that you can add your own
+# architecture-specific flags and dependencies. Remember to do have actions
+# for "archclean" cleaning up for this architecture.
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+# Copyright (C) 1994 by Linus Torvalds
+#
+# 19990713  Artur Skawina <skawina@geocities.com>
+#           Added '-march' and '-mpreferred-stack-boundary' support
+#
+# 20050320  Kianusch Sayah Karadji <kianusch@sk-tech.net>
+#           Added support for GEODE CPU
+
+# BITS is used as extension for files which are available in a 32 bit
+# and a 64 bit version to simplify shared Makefiles.
+# e.g.: obj-y += foo_$(BITS).o
+BITS := 32
+export BITS
+
+HAS_BIARCH      := $(call cc-option-yn, -m32)
+ifeq ($(HAS_BIARCH),y)
+AS              := $(AS) --32
+LD              := $(LD) -m elf_i386
+CC              := $(CC) -m32
+endif
+
+LDFLAGS         := -m elf_i386
+OBJCOPYFLAGS    := -O binary -R .note -R .comment -S
+ifdef CONFIG_RELOCATABLE
+LDFLAGS_vmlinux := --emit-relocs
+endif
+CHECKFLAGS      += -D__i386__
+
+KBUILD_CFLAGS += -pipe -msoft-float -mregparm=3 -freg-struct-return
+
+# prevent gcc from keeping the stack 16 byte aligned
+KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
+
+# CPU-specific tuning. Anything which can be shared with UML should go here.
+include $(srctree)/arch/x86/Makefile_32.cpu
+
+# temporary until string.h is fixed
+cflags-y += -ffreestanding
+
+# this works around some issues with generating unwind tables in older gccs
+# newer gccs do it by default
+cflags-y += -maccumulate-outgoing-args
+
+# Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
+# a lot more stack due to the lack of sharing of stacklots:
+KBUILD_CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then echo $(call cc-option,-fno-unit-at-a-time); fi ;)
+
+# do binutils support CFI?
+cflags-y += $(call as-instr,.cfi_startproc\n.cfi_rel_offset esp${comma}0\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
+KBUILD_AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_rel_offset esp${comma}0\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
+
+# is .cfi_signal_frame supported too?
+cflags-y += $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1,)
+KBUILD_AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1,)
+
+KBUILD_CFLAGS += $(cflags-y)
+
+# Default subarch .c files
+mcore-y  := arch/x86/mach-default
+
+# Voyager subarch support
+mflags-$(CONFIG_X86_VOYAGER)    := -Iinclude/asm-x86/mach-voyager
+mcore-$(CONFIG_X86_VOYAGER)     := arch/x86/mach-voyager
+
+# VISWS subarch support
+mflags-$(CONFIG_X86_VISWS)      := -Iinclude/asm-x86/mach-visws
+mcore-$(CONFIG_X86_VISWS)       := arch/x86/mach-visws
+
+# NUMAQ subarch support
+mflags-$(CONFIG_X86_NUMAQ)      := -Iinclude/asm-x86/mach-numaq
+mcore-$(CONFIG_X86_NUMAQ)       := arch/x86/mach-default
+
+# BIGSMP subarch support
+mflags-$(CONFIG_X86_BIGSMP)     := -Iinclude/asm-x86/mach-bigsmp
+mcore-$(CONFIG_X86_BIGSMP)      := arch/x86/mach-default
+
+#Summit subarch support
+mflags-$(CONFIG_X86_SUMMIT) := -Iinclude/asm-x86/mach-summit
+mcore-$(CONFIG_X86_SUMMIT)  := arch/x86/mach-default
+
+# generic subarchitecture
+mflags-$(CONFIG_X86_GENERICARCH) := -Iinclude/asm-x86/mach-generic
+mcore-$(CONFIG_X86_GENERICARCH) := arch/x86/mach-default
+core-$(CONFIG_X86_GENERICARCH) += arch/x86/mach-generic/
+
+# ES7000 subarch support
+mflags-$(CONFIG_X86_ES7000)     := -Iinclude/asm-x86/mach-es7000
+mcore-$(CONFIG_X86_ES7000)      := arch/x86/mach-default
+core-$(CONFIG_X86_ES7000)       := arch/x86/mach-es7000/
+
+# Xen paravirtualization support
+core-$(CONFIG_XEN)              += arch/x86/xen/
+
+# lguest paravirtualization support
+core-$(CONFIG_LGUEST_GUEST)     += arch/x86/lguest/
+
+# default subarch .h files
+mflags-y += -Iinclude/asm-x86/mach-default
+
+head-y := arch/x86/kernel/head_32.o arch/x86/kernel/init_task.o
+
+libs-y                                  += arch/x86/lib/
+core-y                                  += arch/x86/kernel/ \
+                                           arch/x86/mm/ \
+                                           $(mcore-y)/ \
+                                           arch/x86/crypto/
+drivers-$(CONFIG_MATH_EMULATION)        += arch/x86/math-emu/
+drivers-$(CONFIG_PCI)                   += arch/x86/pci/
+# must be linked after kernel/
+drivers-$(CONFIG_OPROFILE)              += arch/x86/oprofile/
+drivers-$(CONFIG_PM)                    += arch/x86/power/
+drivers-$(CONFIG_FB)                    += arch/x86/video/
+
+KBUILD_CFLAGS += $(mflags-y)
+KBUILD_AFLAGS += $(mflags-y)
+
+boot := arch/x86/boot
+
+PHONY += zImage bzImage compressed zlilo bzlilo \
+         zdisk bzdisk fdimage fdimage144 fdimage288 isoimage install
+
+all: bzImage
+
+# KBUILD_IMAGE specify target image being built
+                    KBUILD_IMAGE := $(boot)/bzImage
+zImage zlilo zdisk: KBUILD_IMAGE := arch/x86/boot/zImage
+
+zImage bzImage: vmlinux
+        $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
+        $(Q)mkdir -p $(objtree)/arch/i386/boot
+        $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/i386/boot/bzImage
+
+compressed: zImage
+
+zlilo bzlilo: vmlinux
+        $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zlilo
+
+zdisk bzdisk: vmlinux
+        $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zdisk
+
+fdimage fdimage144 fdimage288 isoimage: vmlinux
+        $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) $@
+
+install:
+        $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install
+
+archclean:
+        $(Q)rm -rf $(objtree)/arch/i386/boot
+        $(Q)$(MAKE) $(clean)=arch/x86/boot
+
+define archhelp
+  echo  '* bzImage      - Compressed kernel image (arch/$(ARCH)/boot/bzImage)'
+  echo  '  install      - Install kernel using'
+  echo  '                  (your) ~/bin/installkernel or'
+  echo  '                  (distribution) /sbin/installkernel or'
+  echo  '                  install to $$(INSTALL_PATH) and run lilo'
+  echo  '  bzdisk       - Create a boot floppy in /dev/fd0'
+  echo  '  fdimage      - Create a boot floppy image'
+  echo  '  isoimage     - Create a boot CD-ROM image'
+endef
+
+CLEAN_FILES += arch/$(ARCH)/boot/fdimage \
+               arch/$(ARCH)/boot/image.iso \
+               arch/$(ARCH)/boot/mtools.conf