Add a uImage build target for MIPS, which builds uImage.gz (a U-Boot
image of vmlinux.bin.gz), and then symlinks it to uImage. This allows
for the use of other compression algorithms in future, and is how a few
other architectures do it.
The load address and entry address are calculated from the address of
the _text and kernel_entry symbols, by running nm on the main vmlinux
(based on arch/mips/lasat/image/Makefile).
Signed-off-by: James Hogan <james.hogan@xxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
---
arch/mips/Makefile | 3 ++-
arch/mips/boot/.gitignore | 1 +
arch/mips/boot/Makefile | 15 +++++++++++++++
3 files changed, 18 insertions(+), 1 deletion(-)
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index b2be6b8..c4f339e 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -284,7 +284,7 @@ vmlinux.64: vmlinux
all: $(all-y)
# boot
-vmlinux.bin vmlinux.ecoff vmlinux.srec: $(vmlinux-32) FORCE
+vmlinux.bin vmlinux.ecoff vmlinux.srec uImage: $(vmlinux-32) FORCE
$(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) arch/mips/boot/$@
# boot/compressed
@@ -327,6 +327,7 @@ define archhelp
echo ' vmlinuz.ecoff - ECOFF zboot image'
echo ' vmlinuz.bin - Raw binary zboot image'
echo ' vmlinuz.srec - SREC zboot image'
+ echo ' uImage - U-Boot image (gzip)'
echo
echo ' These will be default as appropriate for a configured platform.'
endef
diff --git a/arch/mips/boot/.gitignore b/arch/mips/boot/.gitignore
index f210b09..a73d6e2 100644
--- a/arch/mips/boot/.gitignore
+++ b/arch/mips/boot/.gitignore
@@ -4,3 +4,4 @@ vmlinux.*
zImage
zImage.tmp
calc_vmlinuz_load_addr
+uImage
diff --git a/arch/mips/boot/Makefile b/arch/mips/boot/Makefile
index 851261e..8169d42 100644
--- a/arch/mips/boot/Makefile
+++ b/arch/mips/boot/Makefile
@@ -40,3 +40,18 @@ quiet_cmd_srec = OBJCOPY $@
cmd_srec = $(OBJCOPY) -S -O srec $(strip-flags) $(VMLINUX) $@
$(obj)/vmlinux.srec: $(VMLINUX) FORCE
$(call if_changed,srec)
+
+UIMAGE_LOADADDR = $(shell $(NM) $(VMLINUX) | grep "\b_text\b" | cut -f1 -d\ )
+UIMAGE_ENTRYADDR = $(shell $(NM) $(VMLINUX) | grep '\bkernel_entry\b' | cut -f1 -d\ )
+
+$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
+ $(call if_changed,gzip)
+
+targets += uImage.gz
+$(obj)/uImage.gz: $(obj)/vmlinux.bin.gz FORCE
+ $(call if_changed,uimage,gzip)
+
+targets += uImage
+$(obj)/uImage: $(obj)/uImage.gz FORCE
+ @ln -sf $(notdir $<) $@
+ @echo ' Image $@ is ready'
--
1.8.1.2
