[POWERPC] zImage: Cleanup and improve prep_kernel()

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This patch rewrites prep_kernel() in the zImage wrapper code to be
clearer and more flexible.  Notable changes:

	- Handling of the initrd image from prep_kernel() has moved
into a new prep_initrd() function.
	- The address of the initrd image is now added as device tree
properties, as the kernel expects.
	- We only copy a packaged initrd image to a new location if it
is in danger of being clobbered when the kernel moves to its final
location, instead of always.
	- By default we decompress the kernel directly to address 0,
instead of requiring it to relocate itself.  Platforms (such as OF)
where doing this could clobber still-live firmware data structures can
override the vmlinux_alloc hook to provide an alternate place to
decompress the kernel.
	- We no longer pass lots of information between functions in
global variables.

Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

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This commit is contained in:

David Gibson 2007-03-05 14:24:52 +11:00 • committed by Paul Mackerras

parent ad9d2716cf

commit 79c8541924

3 changed files with 114 additions and 66 deletions

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179

arch/powerpc/boot/main.c

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12

arch/powerpc/boot/of.c

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1

arch/powerpc/boot/ops.h

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