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cmd: bootm: add subcommand preload

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Add a subcommand preload to bootm that execute the preload
stage on the image. Right now, it checks the signature
of the image with the pre-load header. If the check
succeed, the u-boot env variable 'loadaddr_verified'
is set to the address of the image (without the header).

It allows to run such commands:
tftp script.img && bootm preload $loadaddr && source $loadaddr_verified

Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
This commit is contained in:
Philippe Reynes 2022-03-28 22:57:07 +02:00 committed by Tom Rini
parent 776db4fa96
commit 7bebc11c42
1 changed files with 30 additions and 0 deletions
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30
cmd/bootm.c
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@ -44,6 +44,9 @@ static int do_imls(struct cmd_tbl *cmdtp, int flag, int argc,
static struct cmd_tbl cmd_bootm_sub[] = {
U_BOOT_CMD_MKENT(start, 0, 1, (void *)BOOTM_STATE_START, "", ""),
U_BOOT_CMD_MKENT(loados, 0, 1, (void *)BOOTM_STATE_LOADOS, "", ""),
#ifdef CONFIG_CMD_BOOTM_PRE_LOAD
U_BOOT_CMD_MKENT(preload, 0, 1, (void *)BOOTM_STATE_PRE_LOAD, "", ""),
#endif
#ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
U_BOOT_CMD_MKENT(ramdisk, 0, 1, (void *)BOOTM_STATE_RAMDISK, "", ""),
#endif
@ -57,6 +60,20 @@ static struct cmd_tbl cmd_bootm_sub[] = {
U_BOOT_CMD_MKENT(go, 0, 1, (void *)BOOTM_STATE_OS_GO, "", ""),
};
#if defined(CONFIG_CMD_BOOTM_PRE_LOAD)
static ulong bootm_get_addr(int argc, char *const argv[])
{
ulong addr;
if (argc > 0)
addr = hextoul(argv[0], NULL);
else
addr = image_load_addr;
return addr;
}
#endif
static int do_bootm_subcommand(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
@ -72,6 +89,10 @@ static int do_bootm_subcommand(struct cmd_tbl *cmdtp, int flag, int argc,
if (state == BOOTM_STATE_START)
state |= BOOTM_STATE_PRE_LOAD | BOOTM_STATE_FINDOS |
BOOTM_STATE_FINDOTHER;
#if defined(CONFIG_CMD_BOOTM_PRE_LOAD)
if (state == BOOTM_STATE_PRE_LOAD)
state |= BOOTM_STATE_START;
#endif
} else {
/* Unrecognized command */
return CMD_RET_USAGE;
@ -85,6 +106,12 @@ static int do_bootm_subcommand(struct cmd_tbl *cmdtp, int flag, int argc,
ret = do_bootm_states(cmdtp, flag, argc, argv, state, &images, 0);
#if defined(CONFIG_CMD_BOOTM_PRE_LOAD)
if (!ret && (state & BOOTM_STATE_PRE_LOAD))
env_set_hex("loadaddr_verified",
bootm_get_addr(argc, argv) + image_load_offset);
#endif
return ret;
}
@ -177,6 +204,9 @@ static char bootm_help_text[] =
"must be\n"
"issued in the order below (it's ok to not issue all sub-commands):\n"
"\tstart [addr [arg ...]]\n"
#if defined(CONFIG_CMD_BOOTM_PRE_LOAD)
"\tpreload [addr [arg ..]] - run only the preload stage\n"
#endif
"\tloados - load OS image\n"
#if defined(CONFIG_SYS_BOOT_RAMDISK_HIGH)
"\tramdisk - relocate initrd, set env initrd_start/initrd_end\n"