mips: Simplify architecture specific Makefile.inc

The mips Makefile was inherited from x86 and so included lots
of stuff that is necessary on x86 but nowhere else.
That cruft is now gone.

It also adopts the non-x86 approach of handling linker scripts,
hardcoding an include to ldoptions there, instead of manual
concatenation (of just one file plus options).

This is inspired by the commit listed below, but rewritten to match
upstream, and split in smaller pieces to keep intent clear.

Change-Id: Ibf0c7096f9425572d8f83837aa6a253fd91e212c
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Based-On-Change-Id: I50af7dacf616e0f8ff4c43f4acc679089ad7022b
Based-On-Signed-off-by: Julius Werner <jwerner@chromium.org>
Based-On-Reviewed-on: https://chromium-review.googlesource.com/219170
Reviewed-on: http://review.coreboot.org/9163
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/arch/mips/Makefile.inc

@@ -35,6 +35,8 @@ endif
 ifeq ($(CONFIG_ARCH_BOOTBLOCK_MIPS),y)
 
 bootblock-y += boot.c
+bootblock-y += bootblock.S
+bootblock-y += bootblock_simple.c
 bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += early_console.c
 bootblock-y += stages.c
 bootblock-y += timer.c
@@ -44,44 +46,15 @@ bootblock-y += ../../lib/memset.c
 
 bootblock_lds = $(src)/arch/mips/bootblock.ld
 
-bootblock_inc += $(src)/arch/mips/bootblock.S
-bootblock_inc += $(objgenerated)/bootblock.inc
-
 # Much of the assembly code is generated by the compiler, and may contain
 # terms which the preprocessor will happily go on to replace. For example
 # "mips" would be replaced with "1". Clear all the built in definitions to
 # prevent that.
 bootblock-S-ccopts += -undef
 
-$(objgenerated)/bootblock.ld: $$(bootblock_lds) $(obj)/ldoptions
+$(objcbfs)/bootblock.debug:  $(src)/arch/mips/bootblock.ld $$(bootblock-objs) $(obj)/config.h $(obj)/ldoptions
-	@printf "    GEN        $(subst $(obj)/,,$(@))\n"
-	printf '$(foreach ldscript,ldoptions $(bootblock_lds),INCLUDE "$(ldscript)"\n)' > $@
-
-$(objgenerated)/bootblock_inc.S: $$(bootblock_inc)
-	@printf "    GEN        $(subst $(obj)/,,$(@))\n"
-	printf '$(foreach crt0,$(bootblock_inc),#include "$(crt0)"\n)' > $@
-
-$(objgenerated)/bootblock.o: $(objgenerated)/bootblock.s
-	@printf "    CC         $(subst $(obj)/,,$(@))\n"
-	$(CC_bootblock) $(bootblock-S-ccopts) -Wa,-acdlns -c -o $@ $<  > $(basename $@).disasm
-
-$(objgenerated)/bootblock.s: $(objgenerated)/bootblock_inc.S $(obj)/config.h $(obj)/build.h
-	@printf "    CC         $(subst $(obj)/,,$(@))\n"
-	$(CC_bootblock) $(bootblock-S-ccopts) -MMD -x assembler-with-cpp -E \
-			-I$(src)/include -I$(src)/arch/mips/include -I$(obj) \
-			-include $(obj)/build.h -include $(obj)/config.h -I. \
-			-I$(src) $< -o $@
-
-$(objgenerated)/bootblock.inc: $(src)/arch/mips/$(subst ",,$(CONFIG_BOOTBLOCK_SOURCE)) $(bootblock_custom) $(obj)/config.h
-	@printf "    CC      $(subst $(obj)/,,$(@))\n"
-	$(CC_bootblock) $(bootblock-c-ccopts) $(CFLAGS_bootblock) -MM \
-		-MT$(objgenerated)/bootblock.inc \
-		$< > $(objgenerated)/bootblock.inc.d
-	$(CC_bootblock) $(bootblock-c-ccopts) -c -S $(CFLAGS_bootblock) -I. $< -o $@
-
-$(objcbfs)/bootblock.debug:  $(objgenerated)/bootblock.o $(objgenerated)/bootblock.ld $$(bootblock-objs) $(obj)/config.h
 	@printf "    LINK       $(subst $(obj)/,,$(@))\n"
-	$(CC_bootblock)  $(CFLAGS_bootblock) -nostdlib -Wl,--gc-sections -nostartfiles -include $(obj)/config.h -static -o $@ -L$(obj) -T $(objgenerated)/bootblock.ld -Wl,--start-group $(objgenerated)/bootblock.o $(bootblock-objs) -Wl,--end-group
+	$(LD_bootblock) --gc-sections -static -o $@ -L$(obj) -T $(src)/arch/mips/bootblock.ld --start-group $(bootblock-objs) --end-group
 
 endif # CONFIG_ARCH_BOOTBLOCK_MIPS
 
@@ -99,17 +72,9 @@ romstage-y += ../../lib/memcpy.c
 romstage-y += ../../lib/memmove.c
 romstage-y += ../../lib/memset.c
 
-romstage-lds = $(src)/arch/mips/romstage.ld
+$(objcbfs)/romstage.debug: $$(romstage-objs) $(src)/arch/mips/romstage.ld $(obj)/ldoptions
-
-$(objcbfs)/romstage.debug: $$(romstage-objs) $(objgenerated)/romstage.ld
 	@printf "    LINK       $(subst $(obj)/,,$(@))\n"
-	$(CC_romstage) -nostdlib -Wl,--gc-sections -nostartfiles -static -o $@ -L$(obj) -T $(objgenerated)/romstage.ld -Wl,--start-group $(romstage-objs) -Wl,--end-group
+	$(LD_romstage) --gc-sections -static -o $@ -L$(obj) -T $(src)/arch/mips/romstage.ld --start-group $(romstage-objs) --end-group
-
-$(objgenerated)/romstage.ld: $$(romstage-lds) $(obj)/ldoptions
-	@printf "    GEN        $(subst $(obj)/,,$(@))\n"
-	rm -f $@
-	printf '$(foreach ldscript,ldoptions $(romstage-lds),INCLUDE "$(ldscript:$(obj)/%=%)"\n)' >> $@.tmp
-	mv $@.tmp $@
 
 endif # CONFIG_ARCH_ROMSTAGE_MIPS
 
@@ -129,20 +94,8 @@ ramstage-y += ../../lib/memmove.c
 ramstage-y += ../../lib/memset.c
 ramstage-srcs += $(wildcard src/mainboard/$(MAINBOARDDIR)/mainboard.c)
 
-ramstage-lds = $(src)/arch/mips/ramstage.ld
+$(objcbfs)/ramstage.debug: $$(ramstage-objs) $(src)/arch/mips/ramstage.ld $(obj)/ldoptions
-
-$(objgenerated)/ramstage.ld: $$(ramstage-lds) $(obj)/ldoptions
-	@printf "    GEN        $(subst $(obj)/,,$(@))\n"
-	rm -f $@
-	printf '$(foreach ldscript,ldoptions $(ramstage-lds),INCLUDE "$(ldscript:$(obj)/%=%)"\n)' >> $@.tmp
-	mv $@.tmp $@
-
-$(objcbfs)/ramstage.debug: $(objgenerated)/ramstage.o $(objgenerated)/ramstage.ld
 	@printf "    CC         $(subst $(obj)/,,$(@))\n"
-	$(CC_ramstage) -nostdlib -Wl,--gc-sections -nostartfiles -static -o $@ -L$(obj) -T $(objgenerated)/ramstage.ld $<
+	$(LD_ramstage) --gc-sections -static -o $@ -L$(obj) -T $(src)/arch/mips/ramstage.ld --start-group $(ramstage-objs) --end-group
-
-$(objgenerated)/ramstage.o: $$(ramstage-objs)
-	@printf "    CC         $(subst $(obj)/,,$(@))\n"
-	$(CC_ramstage) $(CFLAGS_ramstage) -nostdlib -r -o $@ -Wl,--start-group $(ramstage-objs) -Wl,--end-group
 
 endif # CONFIG_ARCH_RAMSTAGE_MIPS

src/arch/mips/bootblock.ld

@@ -20,6 +20,7 @@
  */
 
 OUTPUT_ARCH(mips)
+INCLUDE ldoptions
 
 ENTRY(_start)
 

src/arch/mips/ramstage.ld

@@ -24,6 +24,7 @@
  */
 
 OUTPUT_ARCH(mips)
+INCLUDE ldoptions
 
 ENTRY(stage_entry)
 

src/arch/mips/romstage.ld

@@ -20,6 +20,7 @@
  */
 
 OUTPUT_ARCH(mips)
+INCLUDE ldoptions
 
 ENTRY(stage_entry)