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bootstd: Add a command to read all files for a bootflow

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Some bootflows (such as EFI and ChromiumOS) delay reading the kernel until
it is needed to boot. This saves time when scanning and avoids needing to
allocate memory for something that may never be used.

To permit reading of these files, add a new 'bootflow read' command.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2023-08-10 19:33:18 -06:00
parent cbb607d2d9
commit c279224ea6
7 changed files with 197 additions and 6 deletions
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33
cmd/bootflow.c
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@ -379,6 +379,35 @@ static int do_bootflow_info(struct cmd_tbl *cmdtp, int flag, int argc,
return 0;
}
static int do_bootflow_read(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct bootstd_priv *std;
struct bootflow *bflow;
int ret;
ret = bootstd_get_priv(&std);
if (ret)
return CMD_RET_FAILURE;
/*
* Require a current bootflow. Users can use 'bootflow scan -b' to
* automatically scan and boot, if needed.
*/
if (!std->cur_bootflow) {
printf("No bootflow selected\n");
return CMD_RET_FAILURE;
}
bflow = std->cur_bootflow;
ret = bootflow_read_all(bflow);
if (ret) {
printf("Failed: err=%dE\n", ret);
return CMD_RET_FAILURE;
}
return 0;
}
static int do_bootflow_boot(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
@ -519,7 +548,8 @@ static char bootflow_help_text[] =
"bootflow list [-e] - list scanned bootflows (-e errors)\n"
"bootflow select [<num>|<name>] - select a bootflow\n"
"bootflow info [-ds] - show info on current bootflow (-d dump bootflow)\n"
"bootflow boot - boot current bootflow (or first available if none selected)\n"
"bootflow read - read all current-bootflow files\n"
"bootflow boot - boot current bootflow\n"
"bootflow menu [-t] - show a menu of available bootflows\n"
"bootflow cmdline [set|get|clear|delete|auto] <param> [<value>] - update cmdline";
#else
@ -533,6 +563,7 @@ U_BOOT_CMD_WITH_SUBCMDS(bootflow, "Boot flows", bootflow_help_text,
U_BOOT_SUBCMD_MKENT(list, 2, 1, do_bootflow_list),
U_BOOT_SUBCMD_MKENT(select, 2, 1, do_bootflow_select),
U_BOOT_SUBCMD_MKENT(info, 2, 1, do_bootflow_info),
U_BOOT_SUBCMD_MKENT(read, 1, 1, do_bootflow_read),
U_BOOT_SUBCMD_MKENT(boot, 1, 1, do_bootflow_boot),
U_BOOT_SUBCMD_MKENT(menu, 2, 1, do_bootflow_menu),
U_BOOT_SUBCMD_MKENT(cmdline, 4, 1, do_bootflow_cmdline),