Makefile: split romstage linking to separate rules

After change it is more clear how romstage is linked twice and with
what scripts. Also with the change, it is easier to add some
object of static size that need to be re-compiled for the 2nd link.
One such object could be md5sum of executable.

Change-Id: Ib34d1876071a51345c5c7319a0ed937868817fd1
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/803
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

diff --git a/src/arch/x86/Makefile.inc b/src/arch/x86/Makefile.inc
index 5917ce50a4a4c26f8cc50e910fd790fb74867cf4..f131af9537ed8d66ccc4692391c9764c152961d4 100755 (executable)
--- a/src/arch/x86/Makefile.inc
+++ b/src/arch/x86/Makefile.inc
@@ -274,9 +274,8 @@ $(obj)/coreboot.pre: $(obj)/coreboot.romstage $(obj)/coreboot.pre1 $(CBFSTOOL)
        @printf "    CBFS       $(subst $(obj)/,,$(@))\n"
        cp $(obj)/coreboot.pre1 $@.tmp
        $(CBFSTOOL) $@.tmp add-stage $(obj)/romstage.elf \
-           $(CONFIG_CBFS_PREFIX)/romstage x 0x$(shell cat $(obj)/location.txt)
+               $(CONFIG_CBFS_PREFIX)/romstage x $(shell cat $(obj)/location.txt)
        mv $@.tmp $@
-#FIXME: location.txt might require an offset of header size
 
 #######################################################################
 # Build the bootblock
@@ -344,26 +343,42 @@ $(obj)/bootblock.elf: $(obj)/mainboard/$(MAINBOARDDIR)/bootblock.o $(obj)/bootbl
 
 #######################################################################
 # Build the romstage
-$(obj)/coreboot.romstage: $(obj)/coreboot.pre1 $$(romstage-objs) $(obj)/romstage/ldscript.ld
+
+$(obj)/romstage.bin: $$(romstage-objs) $(obj)/romstage/link1st.ld
        @printf "    LINK       $(subst $(obj)/,,$(@))\n"
-       printf "ROMSTAGE_BASE = 0x0;\n" > $(obj)/location.ld
-       $(CC) -nostdlib -nostartfiles -static -o $(obj)/romstage.elf -L$(obj) -T $(obj)/romstage/ldscript.ld $(romstage-objs)
-       $(OBJCOPY) -O binary $(obj)/romstage.elf $(obj)/romstage.bin
-       printf "ROMSTAGE_BASE = 0x" > $(obj)/location.ld
-       $(CBFSTOOL) $(obj)/coreboot.pre1 locate $(obj)/romstage.bin $(CONFIG_CBFS_PREFIX)/romstage $(CONFIG_XIP_ROM_SIZE) > $(obj)/location.txt || { echo "The romstage is larger than XIP size. Please expand the CONFIG_XIP_ROM_SIZE" ; exit 1; }
-       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 $(romstage-objs)
+       $(CC) -nostdlib -nostartfiles -static -o $(obj)/romstage.elf -L$(obj) -T $(obj)/romstage/link1st.ld $(romstage-objs)
+       $(OBJCOPY) -O binary $(obj)/romstage.elf $@
+
+$(obj)/coreboot.romstage: $$(romstage-objs) $(obj)/romstage/link2nd.ld
+       @printf "    LINK       $(subst $(obj)/,,$(@))\n"
+       $(CC) -nostdlib -nostartfiles -static -o $(obj)/romstage.elf -L$(obj) -T $(obj)/romstage/link2nd.ld $(romstage-objs)
        $(NM) -n $(obj)/romstage.elf | sort > $(obj)/romstage.map
        $(OBJCOPY) --only-keep-debug $(obj)/romstage.elf $(obj)/romstage.debug
        $(OBJCOPY) --strip-debug $(obj)/romstage.elf
        $(OBJCOPY) --add-gnu-debuglink=$(obj)/romstage.debug $(obj)/romstage.elf
        $(OBJCOPY) -O binary $(obj)/romstage.elf $@
 
-$(obj)/romstage/ldscript.ld: $$(ldscripts) $(obj)/ldoptions
+$(obj)/romstage/link1st.ld: $$(ldscripts) $(obj)/ldoptions
        @printf "    GEN        $(subst $(obj)/,,$(@))\n"
        mkdir -p $(obj)/romstage
-       printf '$(foreach ldscript,ldoptions location.ld $(ldscripts),INCLUDE "$(ldscript:$(obj)/%=%)"\n)' > $@
+       rm -f $@
+       printf "ROMSTAGE_BASE = 0x0;\n" > $@.tmp
+       printf '$(foreach ldscript,ldoptions $(ldscripts),INCLUDE "$(ldscript:$(obj)/%=%)"\n)' >> $@.tmp
+       mv $@.tmp $@
+
+$(obj)/romstage/link2nd.ld: $(obj)/romstage/link1st.ld $(obj)/location.txt
+       @printf "    GEN        $(subst $(obj)/,,$(@))\n"
+       rm -f $@
+       sed -e 's/^/ROMSTAGE_BASE = /g' -e 's/$$/;/g' $(obj)/location.txt > $@.tmp
+       sed -e '/ROMSTAGE_BASE/d' $(obj)/romstage/link1st.ld >> $@.tmp
+       mv $@.tmp $@
+
+$(obj)/location.txt: $(obj)/coreboot.pre1 $(obj)/romstage.bin
+       rm -f $@
+       $(CBFSTOOL) $(obj)/coreboot.pre1 locate $(obj)/romstage.bin $(CONFIG_CBFS_PREFIX)/romstage $(CONFIG_XIP_ROM_SIZE) > $@.tmp \
+        || { echo "The romstage is larger than XIP size. Please expand the CONFIG_XIP_ROM_SIZE" ; exit 1; }
+       sed -i -e 's/^/0x/g' $@.tmp
+       mv $@.tmp $@
 
 $(obj)/romstage/crt0.S: $$(crt0s)
        @printf "    GEN        $(subst $(obj)/,,$(@))\n"