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Add compilation macro for each BL stage

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This patch defines a compile time macro for each boot loader stage
which allows compilation of code only for a specific stage.

Change-Id: I3a4068404cd3dc26d652556ca9ca7afea8dd28ef
This commit is contained in:
Soby Mathew 2014-07-16 15:12:21 +01:00
parent c1efc4c066
commit 27905d0a10
2 changed files with 10 additions and 5 deletions
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10
Makefile
View file

@ -300,7 +300,7 @@ $(eval PREREQUISITES := $(patsubst %.o,%.d,$(OBJ)))
$(OBJ) : $(2)
@echo " CC $$<"
$$(Q)$$(CC) $$(CFLAGS) -c $$< -o $$@
$$(Q)$$(CC) $$(CFLAGS) -DIMAGE_BL$(3) -c $$< -o $$@
$(PREREQUISITES) : $(2)
@ -322,7 +322,7 @@ $(eval PREREQUISITES := $(patsubst %.o,%.d,$(OBJ)))
$(OBJ) : $(2)
@echo " AS $$<"
$$(Q)$$(AS) $$(ASFLAGS) -c $$< -o $$@
$$(Q)$$(AS) $$(ASFLAGS) -DIMAGE_BL$(3) -c $$< -o $$@
$(PREREQUISITES) : $(2)
@echo " DEPS $$@"
@ -359,11 +359,11 @@ endef
define MAKE_OBJS
$(eval C_OBJS := $(filter %.c,$(2)))
$(eval REMAIN := $(filter-out %.c,$(2)))
$(eval $(foreach obj,$(C_OBJS),$(call MAKE_C,$(1),$(obj))))
$(eval $(foreach obj,$(C_OBJS),$(call MAKE_C,$(1),$(obj),$(3))))
$(eval S_OBJS := $(filter %.S,$(REMAIN)))
$(eval REMAIN := $(filter-out %.S,$(REMAIN)))
$(eval $(foreach obj,$(S_OBJS),$(call MAKE_S,$(1),$(obj))))
$(eval $(foreach obj,$(S_OBJS),$(call MAKE_S,$(1),$(obj),$(3))))
$(and $(REMAIN),$(error Unexpected source files present: $(REMAIN)))
endef
@ -387,7 +387,7 @@ define MAKE_BL
$(eval DUMP := $(BUILD_DIR)/bl$(1).dump)
$(eval BIN := $(BUILD_PLAT)/bl$(1).bin)
$(eval $(call MAKE_OBJS,$(BUILD_DIR),$(SOURCES)))
$(eval $(call MAKE_OBJS,$(BUILD_DIR),$(SOURCES),$(1)))
$(eval $(call MAKE_LD,$(LINKERFILE),$(BL$(1)_LINKERFILE)))
$(BUILD_DIR) :

5
docs/firmware-design.md
View file

@ -1226,6 +1226,11 @@ categories. Based upon the above, the code layout looks like this:
lib Yes Yes Yes
services No No Yes
The build system provides a non configurable build option IMAGE_BLx for each
boot loader stage (where x = BL stage). e.g. for BL1 , IMAGE_BL1 will be
defined by the build system. This enables the Trusted Firmware to compile
certain code only for specific boot loader stages
All assembler files have the `.S` extension. The linker source files for each
boot stage have the extension `.ld.S`. These are processed by GCC to create the
linker scripts which have the extension `.ld`.