Move redundant Makefile rules from arch to top level.

Remove all the common Makefile rules like coreboot.pre, coreboot.pre1 and others
from arch level Makefile.inc to top level Makefile.inc.
Also, organize Makefile.inc at arch level into per-stage rules and variables.

Change-Id: I7dc5b2d31c959b55bb92d9c7811427c4dada1db5
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: http://review.coreboot.org/5571
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

1 files changed, 136 insertions, 281 deletions

diff --git a/src/arch/x86/Makefile.inc b/src/arch/x86/Makefile.inc
index db8e500412..eff201a05c 100644
--- a/src/arch/x86/Makefile.inc
+++ b/src/arch/x86/Makefile.inc
@@ -19,9 +19,9 @@
 ## along with this program; if not, write to the Free Software
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 ##
-################################################################################
-
+###############################################################################
 # Take care of subdirectories
+###############################################################################
 subdirs-y += boot
 # subdirs-y += init
 subdirs-y += lib
@@ -42,128 +42,6 @@ cmos_layout.bin-type = 0x01aa
 OPTION_TABLE_H:=$(obj)/option_table.h
 endif
 
-################################################################################
-# Build the final rom image
-COREBOOT_ROM_DEPENDENCIES:=
-ifeq ($(CONFIG_PAYLOAD_ELF),y)
-COREBOOT_ROM_DEPENDENCIES+=$(CONFIG_PAYLOAD_FILE)
-endif
-ifeq ($(CONFIG_PAYLOAD_SEABIOS),y)
-COREBOOT_ROM_DEPENDENCIES+=seabios
-endif
-ifeq ($(CONFIG_PAYLOAD_FILO),y)
-COREBOOT_ROM_DEPENDENCIES+=filo
-endif
-ifeq ($(CONFIG_PAYLOAD_GRUB2),y)
-COREBOOT_ROM_DEPENDENCIES+=grub2
-endif
-
-extract_nth=$(word $(1), $(subst |, ,$(2)))
-
-ifneq ($(CONFIG_UPDATE_IMAGE),y)
-prebuild-files = \
-	$(foreach file,$(cbfs-files), \
-	$(CBFSTOOL) $@.tmp \
-	add$(if $(filter stage,$(call extract_nth,3,$(file))),-stage)$(if $(filter payload,$(call extract_nth,3,$(file))),-payload) \
-	-f $(call extract_nth,1,$(file)) \
-	-n $(call extract_nth,2,$(file)) $(if $(filter-out stage,$(call extract_nth,3,$(file))),-t $(call extract_nth,3,$(file))) \
-	$(if $(call extract_nth,4,$(file)),-b $(call extract_nth,4,$(file))) &&)
-prebuilt-files = $(foreach file,$(cbfs-files), $(call extract_nth,1,$(file)))
-
-$(obj)/coreboot.pre1: $(objcbfs)/bootblock.bin $$(prebuilt-files) $(CBFSTOOL) $$(cpu_ucode_cbfs_file)
-	$(CBFSTOOL) $@.tmp create -m x86 -s $(CONFIG_COREBOOT_ROMSIZE_KB)K \
-		-B $(objcbfs)/bootblock.bin -a 64 \
-		-o $$(( $(CONFIG_ROM_SIZE) - $(CONFIG_CBFS_SIZE) ))
-	$(prebuild-files) true
-	$(call add-cpu-microcode-to-cbfs,$@.tmp)
-	mv $@.tmp $@
-else
-.PHONY: $(obj)/coreboot.pre1
-$(obj)/coreboot.pre1: $(CBFSTOOL)
-	mv $(obj)/coreboot.rom $@
-endif
-
-ifeq ($(CONFIG_PAYLOAD_LINUX),y)
-LINUX_ADDITIONAL_CONFIG:=
-ifneq ($(strip $(call strip_quotes,$(CONFIG_LINUX_COMMAND_LINE))),)
-  LINUX_ADDITIONAL_CONFIG+=-C $(CONFIG_LINUX_COMMAND_LINE)
-endif
-ifneq ($(strip $(call strip_quotes,$(CONFIG_LINUX_INITRD))),)
-  LINUX_ADDITIONAL_CONFIG+=-I $(CONFIG_LINUX_INITRD)
-endif
-endif
-
-ifeq ($(CONFIG_HAVE_REFCODE_BLOB),y)
-REFCODE_BLOB=$(obj)/refcode.rmod
-$(REFCODE_BLOB): $(RMODTOOL)
-	$(RMODTOOL) -i $(CONFIG_REFCODE_BLOB_FILE) -o $@
-endif
-
-$(obj)/coreboot.rom: $(obj)/coreboot.pre $(objcbfs)/ramstage.elf $(CBFSTOOL) $(call strip_quotes,$(COREBOOT_ROM_DEPENDENCIES)) $$(INTERMEDIATE) $$(VBOOT_STUB) $(REFCODE_BLOB)
-	@printf "    CBFS       $(subst $(obj)/,,$(@))\n"
-	cp $(obj)/coreboot.pre $@.tmp
-	$(CBFSTOOL) $@.tmp add-stage -f $(objcbfs)/ramstage.elf -n $(CONFIG_CBFS_PREFIX)/ramstage -c $(CBFS_COMPRESS_FLAG)
-ifeq ($(CONFIG_PAYLOAD_NONE),y)
-	@printf "    PAYLOAD    none (as specified by user)\n"
-endif
-ifeq ($(CONFIG_PAYLOAD_ELF),y)
-	@printf "    PAYLOAD    $(CONFIG_PAYLOAD_FILE) (compression: $(CBFS_PAYLOAD_COMPRESS_FLAG))\n"
-	$(CBFSTOOL) $@.tmp add-payload -f $(CONFIG_PAYLOAD_FILE) -n $(CONFIG_CBFS_PREFIX)/payload -c $(CBFS_PAYLOAD_COMPRESS_FLAG)
-endif
-ifeq ($(CONFIG_PAYLOAD_LINUX),y)
-	@printf "    PAYLOAD    $(CONFIG_PAYLOAD_FILE) (compression: $(CBFS_PAYLOAD_COMPRESS_FLAG))\n"
-	$(CBFSTOOL) $@.tmp add-payload -f $(CONFIG_PAYLOAD_FILE) -n $(CONFIG_CBFS_PREFIX)/payload -c $(CBFS_PAYLOAD_COMPRESS_FLAG) $(LINUX_ADDITIONAL_CONFIG)
-endif
-ifeq ($(CONFIG_PAYLOAD_SEABIOS),y)
-	@printf "    PAYLOAD    SeaBIOS (internal, compression: $(CBFS_PAYLOAD_COMPRESS_FLAG))\n"
-	$(CBFSTOOL) $@.tmp add-payload -f $(CONFIG_PAYLOAD_FILE) -n $(CONFIG_CBFS_PREFIX)/payload -c $(CBFS_PAYLOAD_COMPRESS_FLAG)
-ifneq ($(CONFIG_SEABIOS_PS2_TIMEOUT),)
-ifneq ($(CONFIG_SEABIOS_PS2_TIMEOUT),0)
-	@printf "    SeaBIOS    Wait up to $(CONFIG_SEABIOS_PS2_TIMEOUT) ms for PS/2 keyboard controller initialization\n"
-	$(CBFSTOOL) $@.tmp add-int -i $(CONFIG_SEABIOS_PS2_TIMEOUT) -n etc/ps2-keyboard-spinup
-endif
-endif
-endif
-ifeq ($(CONFIG_PAYLOAD_FILO),y)
-	@printf "    PAYLOAD    FILO (internal, compression: $(CBFS_PAYLOAD_COMPRESS_FLAG))\n"
-	$(CBFSTOOL) $@.tmp add-payload -f $(CONFIG_PAYLOAD_FILE) -n $(CONFIG_CBFS_PREFIX)/payload -c $(CBFS_PAYLOAD_COMPRESS_FLAG)
-endif
-
-ifeq ($(CONFIG_PAYLOAD_GRUB2),y)
-	@printf "    PAYLOAD    GRUB2 (internal, compression: $(CBFS_PAYLOAD_COMPRESS_FLAG))\n"
-	$(CBFSTOOL) $@.tmp add-payload -f $(CONFIG_PAYLOAD_FILE) -n $(CONFIG_CBFS_PREFIX)/payload -c $(CBFS_PAYLOAD_COMPRESS_FLAG)
-endif
-
-ifeq ($(CONFIG_PAYLOAD_TIANOCORE),y)
-	@printf "    PAYLOAD    Tiano Core (compression: $(CBFS_PAYLOAD_COMPRESS_FLAG))\n"
-	$(CBFSTOOL) $@.tmp add-payload -f $(CONFIG_PAYLOAD_FILE) -n $(CONFIG_CBFS_PREFIX)/payload -c $(CBFS_PAYLOAD_COMPRESS_FLAG)
-endif
-ifeq ($(CONFIG_INCLUDE_CONFIG_FILE),y)
-	@printf "    CONFIG     $(DOTCONFIG)\n"
-	if [ -f $(DOTCONFIG) ]; then \
-	echo "# This image was built using git revision" `git rev-parse HEAD` > $(obj)/config.tmp ; \
-	sed -e '/^#/d' -e '/^ *$$/d' $(DOTCONFIG) >> $(obj)/config.tmp ; \
-	$(CBFSTOOL) $@.tmp add -f $(obj)/config.tmp -n config -t raw; rm -f $(obj)/config.tmp ; fi
-endif
-ifeq ($(CONFIG_VBOOT_VERIFY_FIRMWARE),y)
-	$(CBFSTOOL) $@.tmp add-stage -f $(VBOOT_STUB) -n $(CONFIG_CBFS_PREFIX)/vboot -c $(CBFS_COMPRESS_FLAG)
-endif
-ifeq ($(CONFIG_HAVE_REFCODE_BLOB),y)
-	$(CBFSTOOL) $@.tmp add-stage -f $(CONFIG_REFCODE_BLOB_FILE) -n $(CONFIG_CBFS_PREFIX)/refcode -c $(CBFS_COMPRESS_FLAG)
-endif
-ifeq ($(CONFIG_PXE_ROM),y)
-	$(CBFSTOOL) $@.tmp add -f $(CONFIG_PXE_ROM_FILE) -n pci$(CONFIG_PXE_ROM_ID).rom -t raw
-endif
-ifeq ($(CONFIG_CPU_INTEL_FIRMWARE_INTERFACE_TABLE),y)
-ifeq ($(CONFIG_CPU_MICROCODE_ADDED_DURING_BUILD),y)
-	@printf "    UPDATE-FIT \n"
-	$(CBFSTOOL) $@.tmp update-fit -n cpu_microcode_blob.bin -x $(CONFIG_CPU_INTEL_NUM_FIT_ENTRIES)
-endif
-endif
-	mv $@.tmp $@
-	@printf "    CBFSPRINT  $(subst $(obj)/,,$(@))\n\n"
-	$(CBFSTOOL) $@ print
-
 stripped_vgabios_id = $(call strip_quotes,$(CONFIG_VGA_BIOS_ID))
 cbfs-files-$(CONFIG_VGA_BIOS) += pci$(stripped_vgabios_id).rom
 pci$(stripped_vgabios_id).rom-file := $(call strip_quotes,$(CONFIG_VGA_BIOS_FILE))
@@ -173,9 +51,8 @@ cbfs-files-$(CONFIG_INTEL_MBI) += mbi.bin
 mbi.bin-file := $(call strip_quotes,$(CONFIG_MBI_FILE))
 mbi.bin-type := mbi
 
-cbfs-files-$(CONFIG_BOOTSPLASH) += bootsplash.jpg
-bootsplash.jpg-file := $(call strip_quotes,$(CONFIG_BOOTSPLASH_FILE))
-bootsplash.jpg-type := bootsplash
+CBFSTOOL_PRE1_OPTS = -m x86 -o $$(( $(CONFIG_ROM_SIZE) - $(CONFIG_CBFS_SIZE) ))
+CBFSTOOL_PRE_OPTS  = -b $(shell cat $(objcbfs)/base_xip.txt)
 
 ################################################################################
 # i386 specific tools
@@ -189,159 +66,10 @@ $(obj)/cmos_layout.bin: $(NVRAMTOOL) $(top)/src/mainboard/$(MAINBOARDDIR)/cmos.l
 	@printf "    OPTION     $(subst $(obj)/,,$(@))\n"
 	$(NVRAMTOOL) -y $(top)/src/mainboard/$(MAINBOARDDIR)/cmos.layout -L $@
 
-################################################################################
-# Common recipes for all stages
-
-$(objcbfs)/%.bin: $(objcbfs)/%.elf
-	@printf "    OBJCOPY    $(subst $(obj)/,,$(@))\n"
-	$(OBJCOPY) -O binary $< $@
-
-$(objcbfs)/%.elf: $(objcbfs)/%.debug
-	@printf "    OBJCOPY    $(subst $(obj)/,,$(@))\n"
-	cp $< $@.tmp
-	$(NM) -n $@.tmp | sort > $(basename $@).map
-	$(OBJCOPY) --strip-debug $@.tmp
-	$(OBJCOPY) --add-gnu-debuglink=$< $@.tmp
-	mv $@.tmp $@
-
-################################################################################
-# Build the ramstage (stage 2)
-
-ramstage-libs ?=
-
-ifeq ($(CONFIG_RELOCATABLE_RAMSTAGE),y)
-
-$(eval $(call rmodule_link,$(objcbfs)/ramstage.debug, $(objgenerated)/ramstage.o, $(CONFIG_HEAP_SIZE)))
-
-# The rmodule_link defintion creates an elf file with .rmod extension.
-$(objcbfs)/ramstage.elf: $(objcbfs)/ramstage.debug.rmod
-	cp $< $@
-
-else
-
-$(objcbfs)/ramstage.debug: $(objgenerated)/ramstage.o $(src)/arch/x86/ramstage.ld
-	@printf "    CC         $(subst $(obj)/,,$(@))\n"
-ifeq ($(CONFIG_COMPILER_LLVM_CLANG),y)
-	$(LD) -m elf_i386 -o $@ -L$(obj) $< -T $(src)/arch/x86/ramstage.ld
-else
-	$(CC) -nostdlib -nostartfiles -static -o $@ -L$(obj) -T $(src)/arch/x86/ramstage.ld $<
-endif
-
-endif
-
-$(objgenerated)/ramstage.o: $$(ramstage-objs) $(LIBGCC_FILE_NAME) $$(ramstage-libs)
-	@printf "    CC         $(subst $(obj)/,,$(@))\n"
-ifeq ($(CONFIG_COMPILER_LLVM_CLANG),y)
-	$(LD) -m elf_i386 -r -o $@ --wrap __divdi3 --wrap __udivdi3 --wrap __moddi3 --wrap __umoddi3 --start-group $(ramstage-objs) $(ramstage-libs) $(LIBGCC_FILE_NAME) --end-group
-else
-	$(CC) $(CFLAGS) -nostdlib -r -o $@ -Wl,--wrap,__divdi3 -Wl,--wrap,__udivdi3 -Wl,--wrap,__moddi3 -Wl,--wrap,__umoddi3 -Wl,--start-group $(ramstage-objs) $(ramstage-libs) $(LIBGCC_FILE_NAME) -Wl,--end-group
-endif
-
-################################################################################
-# done
-
-crt0s = $(src)/arch/x86/init/prologue.inc
-ldscripts =
-ldscripts += $(src)/arch/x86/init/romstage.ld
-crt0s += $(src)/cpu/x86/32bit/entry32.inc
-ldscripts += $(src)/cpu/x86/32bit/entry32.lds
-
-crt0s += $(src)/cpu/x86/fpu_enable.inc
-ifeq ($(CONFIG_SSE),y)
-crt0s += $(src)/cpu/x86/sse_enable.inc
-endif
-
-crt0s += $(cpu_incs)
-crt0s += $(cpu_incs-y)
-
-crt0s += $(obj)/mainboard/$(MAINBOARDDIR)/romstage.inc
-
-ifeq ($(CONFIG_ROMCC),y)
-crt0s += $(src)/arch/x86/init/crt0_romcc_epilogue.inc
-endif
-
-ifeq ($(CONFIG_ROMCC),y)
-ifeq ($(CONFIG_MMX),y)
- ifeq ($(CONFIG_SSE),y)
-  ROMCCFLAGS := -mcpu=p4 -O2 # MMX, SSE
- else
-  ROMCCFLAGS := -mcpu=p2 -O2 # MMX, !SSE
- endif
-else
- ROMCCFLAGS := -mcpu=i386 -O2 # !MMX, !SSE
-endif
-
-$(obj)/mainboard/$(MAINBOARDDIR)/romstage.inc: $(src)/mainboard/$(MAINBOARDDIR)/romstage.c $(objutil)/romcc/romcc $(OPTION_TABLE_H) $(obj)/build.h $(obj)/config.h
-	printf "    ROMCC      romstage.inc\n"
-	$(ROMCC) -c -S $(ROMCCFLAGS) -D__PRE_RAM__ -I. $(INCLUDES) $< -o $@
-else
-
-$(obj)/mainboard/$(MAINBOARDDIR)/romstage.pre.inc: $(src)/mainboard/$(MAINBOARDDIR)/romstage.c $(OPTION_TABLE_H) $(obj)/build.h $(obj)/config.h
-	@printf "    CC         romstage.inc\n"
-	$(CC) -MMD $(CFLAGS) -D__PRE_RAM__ -I$(src) -I. -I$(obj) -c -S $< -o $@
-
-$(obj)/mainboard/$(MAINBOARDDIR)/romstage.inc: $(obj)/mainboard/$(MAINBOARDDIR)/romstage.pre.inc
-	@printf "    POST       romstage.inc\n"
-	sed -e 's/\.rodata/.rom.data/g' -e 's/\^\.text/.section .rom.text/g' \
-		-e 's/\^\.section \.text/.section .rom.text/g' $^ > $@.tmp
-	mv $@.tmp $@
-endif
-
-# Things that appear in every board
-romstage-srcs += $(objgenerated)/crt0.s
-ramstage-srcs += $(wildcard src/mainboard/$(MAINBOARDDIR)/mainboard.c)
-ifeq ($(CONFIG_GENERATE_MP_TABLE),y)
-ifneq ($(wildcard src/mainboard/$(MAINBOARDDIR)/mptable.c),)
-ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/mptable.c
-endif
-endif
-ifeq ($(CONFIG_GENERATE_PIRQ_TABLE),y)
-ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/irq_tables.c
-endif
-ifneq ($(wildcard src/mainboard/$(MAINBOARDDIR)/reset.c),)
-ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/reset.c
-endif
-ifeq ($(CONFIG_GENERATE_ACPI_TABLES),y)
-ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/acpi_tables.c
-ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/dsdt.asl
-ifneq ($(wildcard src/mainboard/$(MAINBOARDDIR)/ssdt2.asl),)
-ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/ssdt2.asl
-endif
-ifneq ($(wildcard src/mainboard/$(MAINBOARDDIR)/ssdt3.asl),)
-ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/ssdt3.asl
-endif
-ifneq ($(wildcard src/mainboard/$(MAINBOARDDIR)/ssdt4.asl),)
-ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/ssdt4.asl
-endif
-ifneq ($(wildcard src/mainboard/$(MAINBOARDDIR)/ssdt5.asl),)
-ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/ssdt5.asl
-endif
-ifneq ($(wildcard src/mainboard/$(MAINBOARDDIR)/fadt.c),)
-ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/fadt.c
-endif
-endif
-ifeq ($(CONFIG_HAVE_SMI_HANDLER),y)
-ifneq ($(wildcard src/mainboard/$(MAINBOARDDIR)/smihandler.c),)
-smm-srcs += src/mainboard/$(MAINBOARDDIR)/smihandler.c
-endif
-endif
-ifneq ($(wildcard src/mainboard/$(MAINBOARDDIR)/get_bus_conf.c),)
-ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/get_bus_conf.c
-endif
-
-################################################################################
-# Build the final rom image
-
-$(obj)/coreboot.pre: $(objcbfs)/romstage_xip.elf $(obj)/coreboot.pre1 $(CBFSTOOL)
-	@printf "    CBFS       $(subst $(obj)/,,$(@))\n"
-	cp $(obj)/coreboot.pre1 $@.tmp
-	$(CBFSTOOL) $@.tmp add-stage -f $(objcbfs)/romstage_xip.elf \
-		-n $(CONFIG_CBFS_PREFIX)/romstage -c none \
-		-b $(shell cat $(objcbfs)/base_xip.txt)
-	mv $@.tmp $@
 
-################################################################################
-# Build the bootblock
+###############################################################################
+# bootblock
+###############################################################################
 
 bootblock_lds = $(src)/arch/x86/init/ldscript_failover.lb
 bootblock_lds += $(src)/cpu/x86/16bit/entry16.lds
@@ -403,8 +131,58 @@ else
 	$(CC) -nostdlib -nostartfiles -static -o $@ -L$(obj) -T $(objgenerated)/bootblock.ld $<
 endif
 
-################################################################################
-# Build the romstage
+###############################################################################
+# romstage
+###############################################################################
+
+crt0s = $(src)/arch/x86/init/prologue.inc
+ldscripts =
+ldscripts += $(src)/arch/x86/init/romstage.ld
+crt0s += $(src)/cpu/x86/32bit/entry32.inc
+ldscripts += $(src)/cpu/x86/32bit/entry32.lds
+
+crt0s += $(src)/cpu/x86/fpu_enable.inc
+ifeq ($(CONFIG_SSE),y)
+crt0s += $(src)/cpu/x86/sse_enable.inc
+endif
+
+crt0s += $(cpu_incs)
+crt0s += $(cpu_incs-y)
+
+crt0s += $(obj)/mainboard/$(MAINBOARDDIR)/romstage.inc
+
+ifeq ($(CONFIG_ROMCC),y)
+crt0s += $(src)/arch/x86/init/crt0_romcc_epilogue.inc
+endif
+
+ifeq ($(CONFIG_ROMCC),y)
+ifeq ($(CONFIG_MMX),y)
+	ifeq ($(CONFIG_SSE),y)
+		ROMCCFLAGS := -mcpu=p4 -O2 # MMX, SSE
+	else
+		ROMCCFLAGS := -mcpu=p2 -O2 # MMX, !SSE
+	endif
+else
+	ROMCCFLAGS := -mcpu=i386 -O2 # !MMX, !SSE
+endif
+
+$(obj)/mainboard/$(MAINBOARDDIR)/romstage.inc: $(src)/mainboard/$(MAINBOARDDIR)/romstage.c $(objutil)/romcc/romcc $(OPTION_TABLE_H) $(obj)/build.h $(obj)/config.h
+	printf "    ROMCC      romstage.inc\n"
+	$(ROMCC) -c -S $(ROMCCFLAGS) -D__PRE_RAM__ -I. $(INCLUDES) $< -o $@
+else
+
+$(obj)/mainboard/$(MAINBOARDDIR)/romstage.pre.inc: $(src)/mainboard/$(MAINBOARDDIR)/romstage.c $(OPTION_TABLE_H) $(obj)/build.h $(obj)/config.h
+	@printf "    CC         romstage.inc\n"
+	$(CC) -MMD $(CFLAGS) -D__PRE_RAM__ -I$(src) -I. -I$(obj) -c -S $< -o $@
+
+$(obj)/mainboard/$(MAINBOARDDIR)/romstage.inc: $(obj)/mainboard/$(MAINBOARDDIR)/romstage.pre.inc
+	@printf "    POST       romstage.inc\n"
+	sed -e 's/\.rodata/.rom.data/g' -e 's/\^\.text/.section .rom.text/g' \
+		-e 's/\^\.section \.text/.section .rom.text/g' $^ > $@.tmp
+	mv $@.tmp $@
+endif
+
+romstage-srcs += $(objgenerated)/crt0.s
 
 romstage-libs ?=
 
@@ -460,6 +238,83 @@ $(objgenerated)/crt0.s: $(objgenerated)/crt0.romstage.S $(obj)/config.h $(obj)/b
 	@printf "    CC         $(subst $(obj)/,,$(@))\n"
 	$(CC) -MMD -x assembler-with-cpp -E -I$(src)/include -I$(src)/arch/x86/include -I$(obj) -include $(obj)/config.h -include $(obj)/build.h -I. -I$(src) $< -o $@
 
+###############################################################################
+# ramstage
+###############################################################################
+
+ramstage-srcs += $(wildcard src/mainboard/$(MAINBOARDDIR)/mainboard.c)
+ifeq ($(CONFIG_GENERATE_MP_TABLE),y)
+ifneq ($(wildcard src/mainboard/$(MAINBOARDDIR)/mptable.c),)
+ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/mptable.c
+endif
+endif
+ifeq ($(CONFIG_GENERATE_PIRQ_TABLE),y)
+ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/irq_tables.c
+endif
+ifneq ($(wildcard src/mainboard/$(MAINBOARDDIR)/reset.c),)
+ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/reset.c
+endif
+ifeq ($(CONFIG_GENERATE_ACPI_TABLES),y)
+ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/acpi_tables.c
+ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/dsdt.asl
+ifneq ($(wildcard src/mainboard/$(MAINBOARDDIR)/ssdt2.asl),)
+ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/ssdt2.asl
+endif
+ifneq ($(wildcard src/mainboard/$(MAINBOARDDIR)/ssdt3.asl),)
+ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/ssdt3.asl
+endif
+ifneq ($(wildcard src/mainboard/$(MAINBOARDDIR)/ssdt4.asl),)
+ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/ssdt4.asl
+endif
+ifneq ($(wildcard src/mainboard/$(MAINBOARDDIR)/ssdt5.asl),)
+ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/ssdt5.asl
+endif
+ifneq ($(wildcard src/mainboard/$(MAINBOARDDIR)/fadt.c),)
+ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/fadt.c
+endif
+endif
+ifeq ($(CONFIG_HAVE_SMI_HANDLER),y)
+ifneq ($(wildcard src/mainboard/$(MAINBOARDDIR)/smihandler.c),)
+smm-srcs += src/mainboard/$(MAINBOARDDIR)/smihandler.c
+endif
+endif
+ifneq ($(wildcard src/mainboard/$(MAINBOARDDIR)/get_bus_conf.c),)
+ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/get_bus_conf.c
+endif
+
+ramstage-libs ?=
+
+ifeq ($(CONFIG_RELOCATABLE_RAMSTAGE),y)
+
+$(eval $(call rmodule_link,$(objcbfs)/ramstage.debug, $(objgenerated)/ramstage.o, $(CONFIG_HEAP_SIZE)))
+
+# The rmodule_link defintion creates an elf file with .rmod extension.
+$(objcbfs)/ramstage.elf: $(objcbfs)/ramstage.debug.rmod
+	cp $< $@
+
+else
+
+$(objcbfs)/ramstage.debug: $(objgenerated)/ramstage.o $(src)/arch/x86/ramstage.ld
+	@printf "    CC         $(subst $(obj)/,,$(@))\n"
+ifeq ($(CONFIG_COMPILER_LLVM_CLANG),y)
+	$(LD) -m elf_i386 -o $@ -L$(obj) $< -T $(src)/arch/x86/ramstage.ld
+else
+	$(CC) -nostdlib -nostartfiles -static -o $@ -L$(obj) -T $(src)/arch/x86/ramstage.ld $<
+endif
+
+endif
+
+$(objgenerated)/ramstage.o: $$(ramstage-objs) $(LIBGCC_FILE_NAME) $$(ramstage-libs)
+	@printf "    CC         $(subst $(obj)/,,$(@))\n"
+ifeq ($(CONFIG_COMPILER_LLVM_CLANG),y)
+	$(LD) -m elf_i386 -r -o $@ --wrap __divdi3 --wrap __udivdi3 --wrap __moddi3 --wrap __umoddi3 --start-group $(ramstage-objs) $(ramstage-libs) $(LIBGCC_FILE_NAME) --end-group
+else
+	$(CC) $(CFLAGS) -nostdlib -r -o $@ -Wl,--wrap,__divdi3 -Wl,--wrap,__udivdi3 -Wl,--wrap,__moddi3 -Wl,--wrap,__umoddi3 -Wl,--start-group $(ramstage-objs) $(ramstage-libs) $(LIBGCC_FILE_NAME) -Wl,--end-group
+endif
+
+
+################################################################################
+
 seabios:
 	$(MAKE) -C payloads/external/SeaBIOS -f Makefile.inc \
 			HOSTCC="$(HOSTCC)" \