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x86: zboot: Add an 'info' subcommand

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Add a little subcommand that prints out where the kernel was loaded and
its setup pointer. Run it by default in the normal boot.

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>
This commit is contained in:
Simon Glass 2020-09-05 14:50:45 -06:00 committed by Bin Meng
parent 88f1cd6c2a
commit 6f873f5fc6
1 changed files with 15 additions and 3 deletions
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18
arch/x86/lib/zimage.c
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@ -68,9 +68,10 @@ struct zboot_state {
enum {
ZBOOT_STATE_START = BIT(0),
ZBOOT_STATE_GO = BIT(1),
ZBOOT_STATE_INFO = BIT(1),
ZBOOT_STATE_GO = BIT(2),
ZBOOT_STATE_COUNT = 2,
ZBOOT_STATE_COUNT = 3,
};
static void build_command_line(char *command_line, int auto_boot)
@ -383,6 +384,15 @@ static int do_zboot_start(struct cmd_tbl *cmdtp, int flag, int argc,
return 0;
}
static int do_zboot_info(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
printf("Kernel loaded at %08lx, setup_base=%p\n",
state.load_address, state.base_ptr);
return 0;
}
static int do_zboot_go(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
@ -401,6 +411,7 @@ 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(info, 1, 1, do_zboot_info, "", ""),
U_BOOT_CMD_MKENT(go, 1, 1, do_zboot_go, "", ""),
)
@ -441,7 +452,7 @@ int do_zboot_parent(struct cmd_tbl *cmdtp, int flag, int argc,
}
do_zboot_states(cmdtp, flag, argc, argv, ZBOOT_STATE_START |
ZBOOT_STATE_GO);
ZBOOT_STATE_INFO | ZBOOT_STATE_GO);
return CMD_RET_FAILURE;
}
@ -459,6 +470,7 @@ U_BOOT_CMDREP_COMPLETE(
"\n"
"Sub-commands to do part of the zboot sequence:\n"
"\tstart [addr [arg ...]] - specify arguments\n"
"\tinfo - show summary info\n"
"\tgo - start OS\n",
complete_zboot
);