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Commit 4defe455 authored by James Hogan's avatar James Hogan Committed by Ralf Baechle
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MIPS: Add uImage build target 



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: default avatarJames 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: default avatarRalf Baechle <ralf@linux-mips.org>
parent 3185557d

arch/mips/Makefile

+6 −0
Original line number Diff line number Diff line
@@ -263,6 +263,10 @@ drivers-$(CONFIG_PM) += arch/mips/power/ 
boot-y			:= vmlinux.bin

boot-y			+= vmlinux.ecoff

boot-y			+= vmlinux.srec

ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)

boot-y			+= uImage

boot-y			+= uImage.gz

endif



# compressed boot image targets (arch/mips/boot/compressed/)

bootz-y			:= vmlinuz
@@ -341,6 +345,8 @@ 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'

	echo '  uImage.gz            - U-Boot image (gzip)'

	echo

	echo '  These will be default as appropriate for a configured platform.'

endef

arch/mips/boot/.gitignore

+1 −0
Original line number Diff line number Diff line
@@ -4,3 +4,4 @@ vmlinux.* 
zImage

zImage.tmp

calc_vmlinuz_load_addr

uImage

arch/mips/boot/Makefile

+15 −0
Original line number Diff line number Diff line
@@ -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'