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x86: Add support for booting Linux using the 32 bit boot protocol

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This change conditionally modifies the zboot command so that it can use the
32 bit boot protocol. This is necessary because the 16 bit realmode entry
point assumes that it can call BIOS services which neither coreboot nor
u-boot provide.

Signed-off-by: Gabe Black <gabeblack@chromium.org>
This commit is contained in:
Gabe Black
2011-12-05 12:09:24 +00:00
committed by Graeme Russ
parent d3a2bc3fd1
commit 233dbc1194
3 changed files with 62 additions and 17 deletions
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6
arch/x86/lib/bootm.c
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@ -38,6 +38,7 @@ int do_bootm_linux(int flag, int argc, char * const argv[],
void *base_ptr = NULL;
ulong os_data, os_len;
image_header_t *hdr;
void *load_address;
#if defined(CONFIG_FIT)
const void *data;
@ -75,7 +76,8 @@ int do_bootm_linux(int flag, int argc, char * const argv[],
#ifdef CONFIG_CMD_ZBOOT
base_ptr = load_zimage((void *)os_data, os_len,
images->rd_start, images->rd_end - images->rd_start, 0);
images->rd_start, images->rd_end - images->rd_start,
0, &load_address);
#endif
if (NULL == base_ptr) {
@ -92,7 +94,7 @@ int do_bootm_linux(int flag, int argc, char * const argv[],
/* we assume that the kernel is in place */
printf("\nStarting kernel ...\n\n");
boot_zimage(base_ptr);
boot_zimage(base_ptr, load_address);
/* does not return */
error: