Grant Likely wrote: > From: Grant Likely <[EMAIL PROTECTED]> > > 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 <[EMAIL PROTECTED]>
<snip> > diff --git a/Documentation/powerpc/bootwrapper.txt > b/Documentation/powerpc/bootwrapper.txt > new file mode 100644 > index 0000000..a03d73c > --- /dev/null > +++ b/Documentation/powerpc/bootwrapper.txt > @@ -0,0 +1,141 @@ > +The PowerPC boot wrapper > +------------------------ > +Copyright (C) Secret Lab Technologies Ltd. > + > +PowerPC image targets compresses and wraps the kernel image (vmlinux) with > +a boot wrapper to make it usable by the system firmware. There is no > +standard PowerPC firmware interface, so the boot wrapper is designed to > +be adaptable for each kind of image that needs to be built. > + > +The boot wrapper can be found in the arch/powerpc/boot/ directory. The > +Makefile in that directory has targets for all the available image types. > +The different image types are used to support all of the various firmware > +interfaces found on PowerPC platforms. OpenFirmware is the most commonly > +used firmare type on general purpose PowerPC systems from Apple, IBM and typo, s/firmare/firmware/ <snip> > diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile > index b7d4c4c..754c7eb 100644 > --- a/arch/powerpc/Makefile > +++ b/arch/powerpc/Makefile > @@ -169,12 +169,25 @@ 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-Book native image format' typo, s/U-Book/U-Boot/ > + @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 independant image.' typo, s/independant/independent/ Cheers, Anatolij _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
