Tiny Bootblock, step 1/n.

[coreboot.git] / src / arch / i386 / Makefile.tinybootblock.inc

diff --git a/src/arch/i386/Makefile.tinybootblock.inc b/src/arch/i386/Makefile.tinybootblock.inc
new file mode 100644 (file)
index 0000000..86a71a8
--- /dev/null
+++ b/src/arch/i386/Makefile.tinybootblock.inc
@@ -0,0 +1,87 @@
+ifdef POST_EVALUATION
+
+#######################################################################
+# Build the final rom image
+
+$(obj)/coreboot.pre1: $(obj)/coreboot.bootblock $(CBFSTOOL)
+       rm -f $@
+       $(CBFSTOOL) $@ create $(CONFIG_COREBOOT_ROMSIZE_KB)K $(obj)/coreboot.bootblock
+
+$(obj)/coreboot.pre: $(obj)/coreboot.romstage $(obj)/coreboot.pre1 $(CBFSTOOL)
+       rm -f $@
+       cp $(obj)/coreboot.pre1 $@
+       $(CBFSTOOL) $@ add-stage $(obj)/romstage.elf fallback/romstage x 0x$(shell cat $(obj)/location.txt)
+#FIXME: location.txt might require an offset of header size
+
+#######################################################################
+# Build the bootblock
+
+$(obj)/coreboot.bootblock: $(obj)/bootblock.elf
+       @printf "    OBJCOPY    $(subst $(obj)/,,$(@))\n"
+       $(OBJCOPY) -O binary $< $@
+
+bootblock_lds := $(src)/arch/i386/init/ldscript_failover.lb
+bootblock_lds += $(src)/cpu/x86/16bit/entry16.lds
+bootblock_lds += $(src)/cpu/x86/16bit/reset16.lds
+bootblock_lds += $(src)/arch/i386/lib/id.lds
+
+bootblock_inc := $(src)/arch/i386/init/bootblock_prologue.c
+bootblock_inc += $(src)/cpu/x86/16bit/entry16.inc
+bootblock_inc += $(src)/cpu/x86/16bit/reset16.inc
+bootblock_inc += $(src)/cpu/x86/32bit/entry32.inc
+bootblock_inc += $(src)/arch/i386/lib/id.inc
+bootblock_inc += $(obj)/mainboard/$(MAINBOARDDIR)/bootblock.inc
+bootblock_inc += $(src)/arch/i386/lib/walkcbfs.S
+
+$(obj)/bootblock/ldscript.ld: $(bootblock_ldscripts) $(obj)/ldoptions
+       mkdir -p $(obj)/bootblock
+       printf '$(foreach ldscript,ldoptions $(bootblock_lds),INCLUDE "$(ldscript)"\n)' > $@
+
+$(obj)/bootblock/bootblock.c: $(bootblock_inc)
+       mkdir -p $(obj)/bootblock
+       printf '$(foreach crt0,config.h $(bootblock_inc),#include "$(crt0)"\n)' > $@
+
+$(obj)/mainboard/$(MAINBOARDDIR)/bootblock.o: $(obj)/mainboard/$(MAINBOARDDIR)/bootblock.s
+       $(CC) -I$(obj) -Wa,-acdlns -c -o $@ $<  > $(dir $@)/crt0.disasm
+
+$(obj)/mainboard/$(MAINBOARDDIR)/bootblock.s: $(obj)/bootblock/bootblock.c
+       $(CC) -x assembler-with-cpp -DASSEMBLY -E -I$(src)/include -I$(src)/arch/i386/include -I$(obj) -I$(obj)/bootblock -include $(obj)/config.h -I. -I$(src) $< > $@.new && mv $@.new $@
+
+$(obj)/mainboard/$(MAINBOARDDIR)/bootblock.inc: $(obj)/romcc $(src)/arch/i386/init/bootblock.c
+       $(obj)/romcc $(ROMCCFLAGS) $(INCLUDES) $(src)/arch/i386/init/bootblock.c -o $@
+
+$(obj)/bootblock.elf: $(obj)/mainboard/$(MAINBOARDDIR)/bootblock.o $(obj)/bootblock/ldscript.ld
+       @printf "    LINK       $(subst $(obj)/,,$(@))\n"
+       $(CC) -nostdlib -nostartfiles -static -o $@ -L$(obj) -T $(obj)/bootblock/ldscript.ld $<
+       $(NM) -n $(obj)/bootblock.elf | sort > $(obj)/bootblock.map
+
+#######################################################################
+# Build the romstage
+$(obj)/coreboot.romstage: $(obj)/coreboot.pre1 $(initobjs) $(obj)/romstage/ldscript.ld
+       @printf "    LINK       $(subst $(obj)/,,$(@))\n"
+       printf "CONFIG_ROMBASE = 0x0;\n" > $(obj)/location.ld
+       $(CC) -nostdlib -nostartfiles -static -o $(obj)/romstage.elf -L$(obj) -T $(obj)/romstage/ldscript.ld $(initobjs)
+       $(OBJCOPY) -O binary $(obj)/romstage.elf $(obj)/romstage.bin
+       printf "CONFIG_ROMBASE = 0x" > $(obj)/location.ld
+       $(CBFSTOOL) $(obj)/coreboot.pre1 locate $(obj)/romstage.bin fallback/romstage $(CONFIG_XIP_ROM_SIZE) > $(obj)/location.txt
+       cat $(obj)/location.txt >> $(obj)/location.ld
+       printf ";\n" >> $(obj)/location.ld
+       $(CC) -nostdlib -nostartfiles -static -o $(obj)/romstage.elf -L$(obj) -T $(obj)/romstage/ldscript.ld $(initobjs)
+       $(NM) -n $(obj)/romstage.elf | sort > $(obj)/romstage.map
+       $(OBJCOPY) -O binary $(obj)/romstage.elf $@
+
+$(obj)/romstage/ldscript.ld: $(ldscripts) $(obj)/ldoptions
+       mkdir -p $(obj)/romstage
+       printf '$(foreach ldscript,ldoptions location.ld $(ldscripts),INCLUDE "$(ldscript:$(obj)/%=%)"\n)' > $@
+
+$(obj)/romstage/crt0_includes.h: $(crt0s)
+       mkdir -p $(obj)/romstage
+       printf '$(foreach crt0,config.h $(crt0s),#include "$(crt0:$(obj)/%=%)"\n)' > $@
+
+$(obj)/mainboard/$(MAINBOARDDIR)/crt0.o: $(obj)/mainboard/$(MAINBOARDDIR)/crt0.s
+       $(CC) -I$(obj) -Wa,-acdlns -c -o $@ $<  > $(dir $@)/crt0.disasm
+
+$(obj)/mainboard/$(MAINBOARDDIR)/crt0.s: $(src)/arch/i386/init/crt0.S.lb $(obj)/romstage/crt0_includes.h
+       $(CC) -x assembler-with-cpp -DASSEMBLY -E -I$(src)/include -I$(src)/arch/i386/include -I$(obj) -I$(obj)/romstage -include $(obj)/config.h -I. -I$(src) $< > $@.new && mv $@.new $@
+
+endif