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MIPS: Add uImage build target

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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.

It's enabled conditionally on load-y >= 0xffffffff80000000 which
hopefully allows 64bit kernels to also work as long as the load and
entry address can be represented by the 32bit addresses in the U-Boot
image format.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5795/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
James Hogan
2013-08-30 16:42:42 +01:00
committed by Ralf Baechle
parent 3185557d1a
commit 4defe4559e
3 changed files with 22 additions and 0 deletions
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1
arch/mips/boot/.gitignore vendored
View File

@@ -4,3 +4,4 @@ vmlinux.*
zImage
zImage.tmp
calc_vmlinuz_load_addr
uImage

15
arch/mips/boot/Makefile
View File

@@ -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 = $(VMLINUX_LOAD_ADDRESS)
UIMAGE_ENTRYADDR = $(VMLINUX_ENTRY_ADDRESS)
$(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'