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x86: zboot: Allow setting a separate setup base address

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At present the setup block is always obtained from the image
automatically. In some cases it can be useful to use a setup block
obtained elsewhere, e.g. if the image has already been unpacked. Add an
argument to support this and update the logic to use it if provided.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
[bmeng: adjust maxargs to 7 for 'zboot start']
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2020-09-05 14:50:49 -06:00 committed by Bin Meng
parent 126f47c3b8
commit f82cd7b725
1 changed files with 35 additions and 8 deletions
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43
arch/x86/lib/zimage.c
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@ -366,6 +366,22 @@ static int do_zboot_start(struct cmd_tbl *cmdtp, int flag, int argc,
state.initrd_addr = simple_strtoul(argv[3], NULL, 16);
if (argc >= 5)
state.initrd_size = simple_strtoul(argv[4], NULL, 16);
if (argc >= 6) {
/*
* When the base_ptr is passed in, we assume that the image is
* already loaded at the address given by argv[1] and therefore
* the original bzImage is somewhere else, or not accessible.
* In any case, we don't need access to the bzImage since all
* the processing is assumed to be done.
*
* So set the base_ptr to the given address, use this arg as the
* load address and set bzimage_addr to 0 so we know that it
* cannot be proceesed (or processed again).
*/
state.base_ptr = (void *)simple_strtoul(argv[5], NULL, 16);
state.load_address = state.bzimage_addr;
state.bzimage_addr = 0;
}
return 0;
}
@ -375,11 +391,20 @@ static int do_zboot_load(struct cmd_tbl *cmdtp, int flag, int argc,
{
struct boot_params *base_ptr;
base_ptr = load_zimage((void *)state.bzimage_addr, state.bzimage_size,
&state.load_address);
if (!base_ptr) {
puts("## Kernel loading failed ...\n");
return CMD_RET_FAILURE;
if (state.base_ptr) {
struct boot_params *from = (struct boot_params *)state.base_ptr;
base_ptr = (struct boot_params *)DEFAULT_SETUP_BASE;
printf("Building boot_params at 0x%8.8lx\n", (ulong)base_ptr);
memset(base_ptr, '\0', sizeof(*base_ptr));
base_ptr->hdr = from->hdr;
} else {
base_ptr = load_zimage((void *)state.bzimage_addr, state.bzimage_size,
&state.load_address);
if (!base_ptr) {
puts("## Kernel loading failed ...\n");
return CMD_RET_FAILURE;
}
}
state.base_ptr = base_ptr;
if (env_set_hex("zbootbase", (ulong)base_ptr) ||
@ -435,7 +460,7 @@ static int do_zboot_go(struct cmd_tbl *cmdtp, int flag, int argc,
/* Note: This defines the complete_zboot() function */
U_BOOT_SUBCMDS(zboot,
U_BOOT_CMD_MKENT(start, 6, 1, do_zboot_start, "", ""),
U_BOOT_CMD_MKENT(start, 7, 1, do_zboot_start, "", ""),
U_BOOT_CMD_MKENT(load, 1, 1, do_zboot_load, "", ""),
U_BOOT_CMD_MKENT(setup, 1, 1, do_zboot_setup, "", ""),
U_BOOT_CMD_MKENT(info, 1, 1, do_zboot_info, "", ""),
@ -486,8 +511,8 @@ int do_zboot_parent(struct cmd_tbl *cmdtp, int flag, int argc,
}
U_BOOT_CMDREP_COMPLETE(
zboot, 6, do_zboot_parent, "Boot bzImage",
"[addr] [size] [initrd addr] [initrd size]\n"
zboot, 7, do_zboot_parent, "Boot bzImage",
"[addr] [size] [initrd addr] [initrd size] [setup]\n"
" addr - The optional starting address of the bzimage.\n"
" If not set it defaults to the environment\n"
" variable \"fileaddr\".\n"
@ -495,6 +520,8 @@ U_BOOT_CMDREP_COMPLETE(
" zero.\n"
" initrd addr - The address of the initrd image to use, if any.\n"
" initrd size - The size of the initrd image to use, if any.\n"
" setup - The address of the kernel setup region, if this\n"
" is not at addr\n"
"\n"
"Sub-commands to do part of the zboot sequence:\n"
"\tstart [addr [arg ...]] - specify arguments\n"