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zimage: separate uImage loader from try_this_kernel

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Finally all the restructuring pays off: we can cleanly separate the
uImage loader from all the rest, which will make it easy to add
loaders for other kernel image formats.

Signed-off-by: Werner Almesberger <werner@openmoko.org>
This commit is contained in:
Werner Almesberger 2009-01-09 04:32:52 +00:00 committed by Andy Green
parent 31448578d1
commit 188fff8fc3
1 changed files with 38 additions and 30 deletions
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68
qiboot/src/phase2.c
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@ -277,6 +277,42 @@ static int do_crc(const image_header_t *hdr, const void *kernel_dram)
return 0; return 0;
} }
static the_kernel_fn load_uimage(void *kernel_dram)
{
image_header_t *hdr;
u32 kernel_size;
hdr = (image_header_t *)kernel_dram;
if (__be32_to_cpu(hdr->ih_magic) != IH_MAGIC) {
puts("bad magic ");
print32(hdr->ih_magic);
puts("\n");
return NULL;
}
puts(" Found: \"");
puts((const char *)hdr->ih_name);
puts("\"\n Size: ");
printdec(__be32_to_cpu(hdr->ih_size) >> 10);
puts(" KiB\n");
kernel_size = ((__be32_to_cpu(hdr->ih_size) +
sizeof(image_header_t) + 2048) & ~(2048 - 1));
if (read_file(this_kernel->filepath, kernel_dram, kernel_size) < 0) {
indicate(UI_IND_KERNEL_PULL_FAIL);
return NULL;
}
indicate(UI_IND_KERNEL_PULL_OK);
if (!do_crc(hdr, kernel_dram))
return NULL;
return (the_kernel_fn) (((char *)hdr) + sizeof(image_header_t));
}
static void try_this_kernel(void) static void try_this_kernel(void)
{ {
the_kernel_fn the_kernel; the_kernel_fn the_kernel;
@ -284,8 +320,6 @@ static void try_this_kernel(void)
static char commandline_rootfs_append[512] = ""; static char commandline_rootfs_append[512] = "";
int ret; int ret;
void * kernel_dram = (void *)this_board->linux_mem_start + 0x8000; void * kernel_dram = (void *)this_board->linux_mem_start + 0x8000;
image_header_t *hdr;
u32 kernel_size;
partition_offset_blocks = 0; partition_offset_blocks = 0;
partition_length_blocks = 0; partition_length_blocks = 0;
@ -328,30 +362,9 @@ static void try_this_kernel(void)
if (read_file(this_kernel->filepath, kernel_dram, 4096) < 0) if (read_file(this_kernel->filepath, kernel_dram, 4096) < 0)
return; return;
hdr = (image_header_t *)kernel_dram; the_kernel = load_uimage(kernel_dram);
if (!the_kernel)
if (__be32_to_cpu(hdr->ih_magic) != IH_MAGIC) {
puts("bad magic ");
print32(hdr->ih_magic);
puts("\n");
return; return;
}
puts(" Found: \"");
puts((const char *)hdr->ih_name);
puts("\"\n Size: ");
printdec(__be32_to_cpu(hdr->ih_size) >> 10);
puts(" KiB\n");
kernel_size = ((__be32_to_cpu(hdr->ih_size) +
sizeof(image_header_t) + 2048) & ~(2048 - 1));
if (read_file(this_kernel->filepath, kernel_dram, kernel_size) < 0) {
indicate(UI_IND_KERNEL_PULL_FAIL);
return;
}
indicate(UI_IND_KERNEL_PULL_OK);
/* initramfs if needed */ /* initramfs if needed */
@ -368,11 +381,6 @@ static void try_this_kernel(void)
indicate(UI_IND_INITRAMFS_PULL_OK); indicate(UI_IND_INITRAMFS_PULL_OK);
} }
if (!do_crc(hdr, kernel_dram))
return;
the_kernel = (the_kernel_fn) (((char *)hdr) + sizeof(image_header_t));
do_params(initramfs_len, commandline_rootfs_append); do_params(initramfs_len, commandline_rootfs_append);
/* give board implementation a chance to shut down /* give board implementation a chance to shut down