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author | David Gibson <david@gibson.dropbear.id.au> | 2007-03-05 03:24:52 (GMT) |
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committer | Paul Mackerras <paulus@samba.org> | 2007-03-13 02:35:01 (GMT) |
commit | 79c8541924a220964f9f2cbed31eaa9fdb042eab (patch) | |
tree | 94e75bf65ea5cb0d40dfae7215ae432e1f914296 /arch/powerpc/boot/of.c | |
parent | ad9d2716cfc1cda5a7e0d7bc0db45e3af8a4adbb (diff) | |
download | linux-fsl-qoriq-79c8541924a220964f9f2cbed31eaa9fdb042eab.tar.xz |
[POWERPC] zImage: Cleanup and improve prep_kernel()
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>
Diffstat (limited to 'arch/powerpc/boot/of.c')
-rw-r--r-- | arch/powerpc/boot/of.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/powerpc/boot/of.c b/arch/powerpc/boot/of.c index 0182f38..044f347 100644 --- a/arch/powerpc/boot/of.c +++ b/arch/powerpc/boot/of.c @@ -208,6 +208,17 @@ static void of_image_hdr(const void *hdr) } } +static void *of_vmlinux_alloc(unsigned long size) +{ + void *p = malloc(size); + + if (!p) { + printf("Can't allocate memory for kernel image!\n\r"); + exit(); + } + return p; +} + static void of_exit(void) { call_prom("exit", 0, 0); @@ -261,6 +272,7 @@ int platform_init(void *promptr, char *dt_blob_start, char *dt_blob_end) platform_ops.image_hdr = of_image_hdr; platform_ops.malloc = of_try_claim; platform_ops.exit = of_exit; + platform_ops.vmlinux_alloc = of_vmlinux_alloc; dt_ops.finddevice = of_finddevice; dt_ops.getprop = of_getprop; |