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[new uImage] Add image_get_kernel() routine 

Legacy image specific verification is factored out to a separate helper
routine to keep get_kernel() generic and simple.

Signed-off-by: Marian Balakowicz <m8@semihalf.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Marian Balakowicz 2008-02-27 11:02:07 +01:00
parent 8a5ea3e616
commit 1efd43601f
1 changed files with 53 additions and 33 deletions
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86
common/cmd_bootm.c
View File

@ -285,6 +285,57 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
return 1;
}
/**
* get_kernel - find kernel image
* @os_data: pointer to a ulong variable, will hold os data start address
* @os_len: pointer to a ulong variable, will hold os data length
*
* get_kernel() tries to find a kernel image, verifies its integrity
* and locates kernel data.
*
* returns:
* pointer to image header if valid image was found, plus kernel start
* address and length, otherwise NULL
*/
static image_header_t *image_get_kernel (ulong img_addr, int verify)
{
image_header_t *hdr = (image_header_t *)img_addr;
if (!image_check_magic(hdr)) {
puts ("Bad Magic Number\n");
show_boot_progress (-1);
return NULL;
}
show_boot_progress (2);
if (!image_check_hcrc (hdr)) {
puts ("Bad Header Checksum\n");
show_boot_progress (-2);
return NULL;
}
show_boot_progress (3);
image_print_contents (hdr);
if (verify) {
puts (" Verifying Checksum ... ");
if (!image_check_dcrc (hdr)) {
printf ("Bad Data CRC\n");
show_boot_progress (-3);
return NULL;
}
puts ("OK\n");
}
show_boot_progress (4);
if (!image_check_target_arch (hdr)) {
printf ("Unsupported Architecture 0x%x\n", image_get_arch (hdr));
show_boot_progress (-4);
return NULL;
}
return hdr;
}
/**
* get_kernel - find kernel image
* @os_data: pointer to a ulong variable, will hold os data start address
@ -339,40 +390,9 @@ static void *get_kernel (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
case IMAGE_FORMAT_LEGACY:
debug ("* kernel: legacy format image\n");
hdr = (image_header_t *)img_addr;
if (!image_check_magic(hdr)) {
puts ("Bad Magic Number\n");
show_boot_progress (-1);
hdr = image_get_kernel (img_addr, images->verify);
if (!hdr)
return NULL;
}
show_boot_progress (2);
if (!image_check_hcrc (hdr)) {
puts ("Bad Header Checksum\n");
show_boot_progress (-2);
return NULL;
}
show_boot_progress (3);
image_print_contents (hdr);
if (images->verify) {
puts (" Verifying Checksum ... ");
if (!image_check_dcrc (hdr)) {
printf ("Bad Data CRC\n");
show_boot_progress (-3);
return NULL;
}
puts ("OK\n");
}
show_boot_progress (4);
if (!image_check_target_arch (hdr)) {
printf ("Unsupported Architecture 0x%x\n", image_get_arch (hdr));
show_boot_progress (-4);
return NULL;
}
show_boot_progress (5);
switch (image_get_type (hdr)) {