treewide: Add Kconfig variable MEMLAYOUT_LD_FILE

This change defines a Kconfig variable MEMLAYOUT_LD_FILE which allows
SoC/mainboard to provide a linker file for the platform. x86 already
provides a default memlayout.ld under src/arch/x86. With this new
Kconfig variable, it is possible for the SoC/mainboard code for x86 to
provide a custom linker file as well.

Makefile.inc is updated for all architectures to use this new Kconfig
variable instead of assuming memlayout.ld files under a certain
path. All non-x86 boards used memlayout.ld under mainboard
directory. However, a lot of these boards were simply including the
memlayout from SoC. So, this change also updates these mainboards and
SoCs to define the Kconfig as required.

BUG=b:155322763
TEST=Verified that abuild with --timeless option results in the same
coreboot.rom image for all boards.

Change-Id: I6a7f96643ed0519c93967ea2c3bcd881a5d6a4d6
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42292
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

2 files changed, 8 insertions, 7 deletions

diff --git a/src/arch/x86/Kconfig b/src/arch/x86/Kconfig
index 0a207e19b0..18c1ed3d9f 100644
--- a/src/arch/x86/Kconfig
+++ b/src/arch/x86/Kconfig
@@ -316,4 +316,8 @@ config MAX_ACPI_TABLE_SIZE_KB
 	help
 	  Set the maximum size of all ACPI tables in KiB.
 
+config MEMLAYOUT_LD_FILE
+	string
+	default "src/arch/x86/memlayout.ld"
+
 endif
diff --git a/src/arch/x86/Makefile.inc b/src/arch/x86/Makefile.inc
index 8d4c45714d..1b70fec582 100644
--- a/src/arch/x86/Makefile.inc
+++ b/src/arch/x86/Makefile.inc
@@ -67,14 +67,13 @@ endef
 define early_x86_stage
 # $1 stage name
 # $2 oformat
-$(1)-y += memlayout.ld
 
 # The '.' include path is needed for the generated assembly.inc file.
 $(1)-S-ccopts += -I.
 
 $$(objcbfs)/$(1).debug: $$$$($(1)-libs) $$$$($(1)-objs)
 	@printf "    LINK       $$(subst $$(obj)/,,$$(@))\n"
-	$$(LD_$(1)) $$(LDFLAGS_$(1)) -o $$@ -L$$(obj) $$(COMPILER_RT_FLAGS_$(1)) --whole-archive --start-group $$(filter-out %.ld,$$($(1)-objs)) $$($(1)-libs) --no-whole-archive $$(COMPILER_RT_$(1)) --end-group -T $(call src-to-obj,$(1),$(dir)/memlayout.ld) --oformat $(2)
+	$$(LD_$(1)) $$(LDFLAGS_$(1)) -o $$@ -L$$(obj) $$(COMPILER_RT_FLAGS_$(1)) --whole-archive --start-group $$(filter-out %.ld,$$($(1)-objs)) $$($(1)-libs) --no-whole-archive $$(COMPILER_RT_$(1)) --end-group -T $(call src-to-obj,$(1),$(CONFIG_MEMLAYOUT_LD_FILE)) --oformat $(2)
 	-LANG=C LC_ALL= $$(OBJCOPY_$(1)) --only-section .illegal_globals $$(@) $$(objcbfs)/$(1)_null.offenders >/dev/null 2>&1
 	if [ -z "$$$$($$(NM_$(1)) $$(objcbfs)/$(1)_null.offenders 2>&1 | grep 'no symbols')" ];then \
 		echo "Forbidden global variables in $(1):"; \
@@ -201,7 +200,6 @@ postcar-$(CONFIG_IDT_IN_EVERY_STAGE) += exception.c
 postcar-$(CONFIG_IDT_IN_EVERY_STAGE) += idt.S
 postcar-y += exit_car.S
 postcar-y += memmove.c
-postcar-y += memlayout.ld
 postcar-$(CONFIG_X86_TOP4G_BOOTMEDIA_MAP) += mmap_boot.c
 postcar-y += postcar.c
 postcar-$(CONFIG_COLLECT_TIMESTAMPS_TSC) += timestamp.c
@@ -210,7 +208,7 @@ LDFLAGS_postcar += -Map $(objcbfs)/postcar.map
 
 $(objcbfs)/postcar.debug: $$(postcar-objs)
 	@printf "    LINK       $(subst $(obj)/,,$(@))\n"
-	$(LD_postcar) $(LDFLAGS_postcar) -o $@ -L$(obj) $(COMPILER_RT_FLAGS_postcar) --whole-archive --start-group $(filter-out %.ld,$^) --no-whole-archive $(COMPILER_RT_postcar) --end-group -T $(call src-to-obj,postcar,src/arch/x86/memlayout.ld)
+	$(LD_postcar) $(LDFLAGS_postcar) -o $@ -L$(obj) $(COMPILER_RT_FLAGS_postcar) --whole-archive --start-group $(filter-out %.ld,$^) --no-whole-archive $(COMPILER_RT_postcar) --end-group -T $(call src-to-obj,postcar,$(CONFIG_MEMLAYOUT_LD_FILE))
 
 $(objcbfs)/postcar.elf: $(objcbfs)/postcar.debug.rmod
 	cp $< $@
@@ -236,7 +234,6 @@ ramstage-y += exception.c
 ramstage-y += idt.S
 ramstage-y += gdt.c
 ramstage-$(CONFIG_IOAPIC) += ioapic.c
-ramstage-y += memlayout.ld
 ramstage-y += memmove.c
 ramstage-$(CONFIG_X86_TOP4G_BOOTMEDIA_MAP) += mmap_boot.c
 ramstage-$(CONFIG_GENERATE_MP_TABLE) += mpspec.c
@@ -289,9 +286,9 @@ $(objcbfs)/ramstage.elf: $(objcbfs)/ramstage.debug.rmod
 
 endif
 
-$(objcbfs)/ramstage.debug: $(objgenerated)/ramstage.o $(call src-to-obj,ramstage,src/arch/x86/memlayout.ld)
+$(objcbfs)/ramstage.debug: $(objgenerated)/ramstage.o $(call src-to-obj,ramstage,$(CONFIG_MEMLAYOUT_LD_FILE))
 	@printf "    CC         $(subst $(obj)/,,$(@))\n"
-	$(LD_ramstage) $(CPPFLAGS) $(LDFLAGS_ramstage) -o $@ -L$(obj) $< -T $(call src-to-obj,ramstage,src/arch/x86/memlayout.ld)
+	$(LD_ramstage) $(CPPFLAGS) $(LDFLAGS_ramstage) -o $@ -L$(obj) $< -T $(call src-to-obj,ramstage,$(CONFIG_MEMLAYOUT_LD_FILE))
 
 $(objgenerated)/ramstage.o: $$(ramstage-objs) $(COMPILER_RT_ramstage) $$(ramstage-libs)
 	@printf "    CC         $(subst $(obj)/,,$(@))\n"