Today, if the user selects no payload at all, an image is created that 
will leave the system bricked when flashed. This patch adds an easy way of
selecting SeaBIOS as a payload and makes it the default (instead of "no
payload", which still exists as an option)

Signed-off-by: Stefan Reinauer <stepan@coreboot.org>

Index: src/Kconfig
===================================================================
--- src/Kconfig	(revision 6205)
+++ src/Kconfig	(working copy)
@@ -333,7 +333,8 @@
 
 choice
 	prompt "Add a payload"
-	default PAYLOAD_NONE
+	default PAYLOAD_NONE if !ARCH_X86
+	default PAYLOAD_SEABIOS if ARCH_X86
 
 config PAYLOAD_NONE
 	bool "None"
@@ -355,6 +356,16 @@
 	  You will be able to specify the location and file name of the
 	  payload image later.
 
+config PAYLOAD_SEABIOS
+	bool "SeaBIOS"
+	depends on ARCH_X86
+	help
+	  Select this option if you want to build a coreboot image
+	  with a SeaBIOS payload. If you don't know what this is
+	  about, just leave it enabled.
+
+	  See http://coreboot.org/Payloads for more information.
+
 endchoice
 
 config PAYLOAD_FILE
@@ -364,11 +375,15 @@
 	help
 	  The path and filename of the ELF executable file to use as payload.
 
+config PAYLOAD_FILE
+	depends on PAYLOAD_SEABIOS
+	default "payloads/external/SeaBIOS/seabios/out/bios.bin.elf"
+
 # TODO: Defined if no payload? Breaks build?
 config COMPRESSED_PAYLOAD_LZMA
 	bool "Use LZMA compression for payloads"
 	default y
-	depends on PAYLOAD_ELF
+	depends on PAYLOAD_ELF || PAYLOAD_SEABIOS
 	help
 	  In order to reduce the size payloads take up in the ROM chip
 	  coreboot can compress them using the LZMA algorithm.
Index: src/arch/x86/Makefile.inc
===================================================================
--- src/arch/x86/Makefile.inc	(revision 6205)
+++ src/arch/x86/Makefile.inc	(working copy)
@@ -34,9 +34,12 @@
 #######################################################################
 # Build the final rom image
 COREBOOT_ROM_DEPENDENCIES:=
-ifneq ($(CONFIG_PAYLOAD_NONE),y)
+ifeq ($(CONFIG_PAYLOAD_ELF),y)
 COREBOOT_ROM_DEPENDENCIES+=$(CONFIG_PAYLOAD_FILE)
 endif
+ifeq ($(CONFIG_PAYLOAD_SEABIOS),y)
+COREBOOT_ROM_DEPENDENCIES+=seabios
+endif
 ifeq ($(CONFIG_VGA_BIOS),y)
 COREBOOT_ROM_DEPENDENCIES+=$(CONFIG_VGA_BIOS_FILE)
 endif
@@ -80,10 +83,15 @@
 	$(CBFSTOOL) $@.tmp add-stage $(obj)/coreboot_ram $(CONFIG_CBFS_PREFIX)/coreboot_ram $(CBFS_COMPRESS_FLAG)
 ifeq ($(CONFIG_PAYLOAD_NONE),y)
 	@printf "    PAYLOAD    \e[1;31mnone (as specified by user)\e[0m\n"
-else
+endif
+ifeq ($(CONFIG_PAYLOAD_ELF),y)
 	@printf "    PAYLOAD    $(CONFIG_PAYLOAD_FILE) (compression: $(CBFS_PAYLOAD_COMPRESS_NAME))\n"
 	$(CBFSTOOL) $@.tmp add-payload $(CONFIG_PAYLOAD_FILE) $(CONFIG_CBFS_PREFIX)/payload $(CBFS_PAYLOAD_COMPRESS_FLAG)
 endif
+ifeq ($(CONFIG_PAYLOAD_SEABIOS),y)
+	@printf "    PAYLOAD    SeaBIOS (internal, compression: $(CBFS_PAYLOAD_COMPRESS_NAME))\n"
+	$(CBFSTOOL) $@.tmp add-payload $(CONFIG_PAYLOAD_FILE) $(CONFIG_CBFS_PREFIX)/payload $(CBFS_PAYLOAD_COMPRESS_FLAG)
+endif
 ifeq ($(CONFIG_VGA_BIOS),y)
 	@printf "    VGABIOS    $(CONFIG_VGA_BIOS_FILE) $(CONFIG_VGA_BIOS_ID)\n"
 	$(CBFSTOOL) $@.tmp add $(CONFIG_VGA_BIOS_FILE) "pci$(CONFIG_VGA_BIOS_ID).rom" optionrom
@@ -272,3 +280,7 @@
 else
 include $(src)/arch/x86/Makefile.bigbootblock.inc
 endif
+
+seabios:
+	$(MAKE) -C payloads/external/SeaBIOS CC="$(CC)" LD="$(LD)"
+
Index: payloads/external/SeaBIOS/Makefile
===================================================================
--- payloads/external/SeaBIOS/Makefile	(revision 0)
+++ payloads/external/SeaBIOS/Makefile	(revision 0)
@@ -0,0 +1,25 @@
+all: seabios
+
+seabios: patch
+	cd seabios; $(MAKE) CC="$(CC)" LD="$(LD)"
+
+patch: checkout
+	test -r seabios/.patched || \
+	perl -pi -e "s,#define CONFIG_COREBOOT 0,#define CONFIG_COREBOOT 1,;" \
+		 -e "s,#define CONFIG_DEBUG_SERIAL 0,#define CONFIG_DEBUG_SERIAL 1,;" \
+		 -e "s,#define CONFIG_VGAHOOKS 0,#define CONFIG_VGAHOOKS 1,;" \
+		 -e "s,#define CONFIG_AHCI 0,#define CONFIG_AHCI 1," \
+		 seabios/src/config.h
+	touch seabios/.patched
+
+checkout:
+	test -d seabios && ( cd seabios; git pull ) || \
+	git clone git://git.linuxtogo.org/home/kevin/seabios.git seabios
+
+clean:
+	test -d seabios && (cd seabios; $(MAKE) CC="$(CC)" LD="$(LD)" clean) || exit 0
+
+distclean:
+	rm -rf seabios
+
+.PHONY: seabios
Index: util/abuild/abuild
===================================================================
--- util/abuild/abuild	(revision 6205)
+++ util/abuild/abuild	(working copy)
@@ -175,6 +175,7 @@
 		echo "CONFIG_CBFS_PREFIX=\"$cbfs_prefix\"" >> ${build_dir}/config.build
 		if [ "$PAYLOAD" != "/dev/null" ]; then
 			echo "# CONFIG_PAYLOAD_NONE is not set" >> ${build_dir}/config.build
+			echo "# CONFIG_PAYLOAD_SEABIOS is not set" >> ${build_dir}/config.build
 			echo "CONFIG_PAYLOAD_ELF=y" >> ${build_dir}/config.build
 			echo "CONFIG_PAYLOAD_FILE=\"$PAYLOAD\"" >> ${build_dir}/config.build
 		fi
Index: Makefile
===================================================================
--- Makefile	(revision 6205)
+++ Makefile	(working copy)
@@ -363,6 +363,7 @@
 	rm -f $(obj)/mainboard/$(MAINBOARDDIR)/bootblock.* $(obj)/mainboard/$(MAINBOARDDIR)/dsdt.*
 	rm -f $(obj)/cpu/x86/smm/smm_bin.c $(obj)/cpu/x86/smm/smm.* $(obj)/cpu/x86/smm/smm
 	rmdir -p $(alldirs) 2>/dev/null >/dev/null || true
+	make -C payloads/external/SeaBIOS clean
 
 clean: clean-for-update
 	rm -f $(obj)/coreboot* .ccwrap