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x86: zboot: Add an 'load' subcommand

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Add a subcommand that loads the kernel into the right places in memory.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
[bmeng: adjust ZBOOT_STATE_INFO value to match the command order]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2020-09-05 14:50:46 -06:00 • committed by Bin Meng
parent 6f873f5fc6
commit 1d9e4bb755
1 changed files with 16 additions and 7 deletions
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23
arch/x86/lib/zimage.c
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@ -68,10 +68,11 @@ struct zboot_state {
enum {
ZBOOT_STATE_START = BIT(0),
ZBOOT_STATE_INFO = BIT(1),
ZBOOT_STATE_GO = BIT(2),
ZBOOT_STATE_LOAD = BIT(1),
ZBOOT_STATE_INFO = BIT(2),
ZBOOT_STATE_GO = BIT(3),
ZBOOT_STATE_COUNT = 3,
ZBOOT_STATE_COUNT = 4,
};
static void build_command_line(char *command_line, int auto_boot)
@ -342,7 +343,6 @@ int setup_zimage(struct boot_params *setup_base, char *cmd_line, int auto_boot,
static int do_zboot_start(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct boot_params *base_ptr;
const char *s;
memset(&state, '\0', sizeof(state));
@ -366,12 +366,19 @@ static int do_zboot_start(struct cmd_tbl *cmdtp, int flag, int argc,
if (argc >= 5)
state.initrd_size = simple_strtoul(argv[4], NULL, 16);
/* Lets look for */
return 0;
}
static int do_zboot_load(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
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 -1;
return CMD_RET_FAILURE;
}
state.base_ptr = base_ptr;
@ -411,6 +418,7 @@ 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(load, 1, 1, do_zboot_load, "", ""),
U_BOOT_CMD_MKENT(info, 1, 1, do_zboot_info, "", ""),
U_BOOT_CMD_MKENT(go, 1, 1, do_zboot_go, "", ""),
)
@ -452,7 +460,7 @@ int do_zboot_parent(struct cmd_tbl *cmdtp, int flag, int argc,
}
do_zboot_states(cmdtp, flag, argc, argv, ZBOOT_STATE_START |
ZBOOT_STATE_INFO | ZBOOT_STATE_GO);
ZBOOT_STATE_LOAD | ZBOOT_STATE_INFO | ZBOOT_STATE_GO);
return CMD_RET_FAILURE;
}
@ -470,6 +478,7 @@ U_BOOT_CMDREP_COMPLETE(
"\n"
"Sub-commands to do part of the zboot sequence:\n"
"\tstart [addr [arg ...]] - specify arguments\n"
"\tload - load OS image\n"
"\tinfo - show summary info\n"
"\tgo - start OS\n",
complete_zboot