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authorGrant Likely <grant.likely@secretlab.ca>2008-06-25 13:14:36 -0700
committerGrant Likely <grant.likely@secretlab.ca>2008-07-04 00:59:03 -0600
commit70bf0333d72cd66daf7664c44708f65518b267cc (patch)
tree7bdf4851106f4d0c528a7cd07d017d68bb94e8ba /arch/powerpc/Makefile
parent94ec359e45f2d6ec27027055f64bece03ea2bf07 (diff)
downloadlinaro-lsk-70bf0333d72cd66daf7664c44708f65518b267cc.tar.gz
powerpc/bootwrapper: Add documentation of boot wrapper targets
There have been many questions on and off the mailing list about how exactly the bootwrapper is used for embedded targets. Add some documentation and help text to try and clarify the system. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'arch/powerpc/Makefile')
-rw-r--r--arch/powerpc/Makefile15
1 files changed, 14 insertions, 1 deletions
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 59ae7d9cdcc..9155c9312c1 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -163,12 +163,25 @@ bootwrapper_install %.dtb:
$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
define archhelp
- @echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
+ @echo '* zImage - Build default images selected by kernel config'
+ @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
+ @echo ' uImage - U-Boot native image format'
+ @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
+ @echo ' versions which do not support device trees'
+ @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
+ @echo ' simpleImage.<dt> - Firmware independent image.'
+ @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
@echo ' install - Install kernel using'
@echo ' (your) ~/bin/installkernel or'
@echo ' (distribution) /sbin/installkernel or'
@echo ' install to $$(INSTALL_PATH) and run lilo'
@echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
+ @echo ''
+ @echo ' Targets with <dt> embed a device tree blob inside the image'
+ @echo ' These targets support board with firmware that does not'
+ @echo ' support passing a device tree directly. Replace <dt> with the'
+ @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
+ @echo ' (minus the .dts extension).'
endef
install: