[U-Boot] [RFC PATCH v1 3/9] Extend build-system for SPL framework

Daniel Schwierzeck
2011-07-13T15:11:03Z

Signed-off-by: Aneesh V <aneesh@ti.com>
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@googlemail.com>
---
Makefile | 3 ++-
config.mk | 36 +++++++++++++++++++++++++++++++++++-
2 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 62c2078..9478059 100644
--- a/Makefile
+++ b/Makefile
@@ -104,10 +104,11 @@ $(if $(BUILD_DIR),,$(error output directory "$(saved-output)" does not exist))
endif # ifneq ($(BUILD_DIR),)

OBJTREE := $(if $(BUILD_DIR),$(BUILD_DIR),$(CURDIR))
+SPLTREE := $(OBJTREE)/spl
SRCTREE := $(CURDIR)
TOPDIR := $(SRCTREE)
LNDIR := $(OBJTREE)
-export TOPDIR SRCTREE OBJTREE
+export TOPDIR SRCTREE OBJTREE SPLTREE

MKCONFIG := $(SRCTREE)/mkconfig
export MKCONFIG
diff --git a/config.mk b/config.mk
index 2eb7fa2..8809d7a 100644
--- a/config.mk
+++ b/config.mk
@@ -23,19 +23,31 @@

#########################################################################

-ifneq ($(OBJTREE),$(SRCTREE))
ifeq ($(CURDIR),$(SRCTREE))
dir :=
else
dir := $(subst $(SRCTREE)/,,$(CURDIR))
endif

+ifneq ($(OBJTREE),$(SRCTREE))
+# Create object files for SPL in a separate directory
+ifeq ($(CONFIG_SPL_BUILD),y)
+obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
+else
obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
+endif
src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)

$(shell mkdir -p $(obj))
else
+# Create object files for SPL in a separate directory
+ifeq ($(CONFIG_SPL_BUILD),y)
+obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
+
+$(shell mkdir -p $(obj))
+else
obj :=
+endif
src :=
endif

@@ -158,12 +170,29 @@ OBJCFLAGS += --gap-fill=0xff

gccincdir := $(shell $(CC) -print-file-name=include)

+# Use section garbage collect for SPL if enabled by board config
+# and current ARCH, CPU or SOC did not enable it already
+ifeq ($(CONFIG_SPL_BUILD),y)
+ifeq ($(CONFIG_SPL_GC_SECTIONS),y)
+RELFLAGS += -ffunction-sections -fdata-sections
+LDFLAGS_FINAL += --gc-sections
+endif
+endif
+
CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
-D__KERNEL__
ifneq ($(CONFIG_SYS_TEXT_BASE),)
CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
endif

+ifneq ($(CONFIG_SPL_TEXT_BASE),)
+CPPFLAGS += -DCONFIG_SPL_TEXT_BASE=$(CONFIG_SPL_TEXT_BASE)
+endif
+
+ifeq ($(CONFIG_SPL_BUILD),y)
+CPPFLAGS += -DCONFIG_SPL_BUILD
+endif
+
ifneq ($(RESET_VECTOR_ADDRESS),)
CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
endif
@@ -206,6 +235,11 @@ ifneq ($(CONFIG_SYS_TEXT_BASE),)
LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
endif

+LDFLAGS_u-boot-spl += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL)
+ifneq ($(CONFIG_SPL_TEXT_BASE),)
+LDFLAGS_u-boot-spl += -Ttext $(CONFIG_SPL_TEXT_BASE)
+endif
+
# Location of a usable BFD library, where we define "usable" as
# "built for ${HOST}, supports ${TARGET}". Sensible values are
# - When cross-compiling: the root of the cross-environment
--
1.7.6