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3809fd35a5
We have previously added logic to allow a "fallback" option to be
specified in the extlinux configuration. Provide a command that allows
us to set this as the preferred default option when booting.
Combined with the bootcount functionality, this allows the "altbootcmd"
to provide a means of falling back to a previously known good state
after a failed update. For example, if "bootcmd" is set to:
bootflow scan -lb
We would set "altbootcmd" to:
bootmeth set extlinux fallback 1; bootflow scan -lb
Causing the boot process to boot from the fallback option.
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Martyn Welch <martyn.welch@collabora.com>
134 lines
3.0 KiB
C
134 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* 'bootmeth' command
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*
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* Copyright 2021 Google LLC
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#include <bootdev.h>
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#include <bootmeth.h>
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#include <bootstd.h>
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#include <command.h>
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#include <dm.h>
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#include <malloc.h>
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#include <dm/uclass-internal.h>
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static int do_bootmeth_list(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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struct bootstd_priv *std;
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struct udevice *dev;
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bool use_order;
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bool all = false;
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int ret;
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int i;
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if (argc > 1 && *argv[1] == '-') {
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all = strchr(argv[1], 'a');
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argc--;
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argv++;
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}
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ret = bootstd_get_priv(&std);
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if (ret) {
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printf("Cannot get bootstd (err=%d)\n", ret);
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return CMD_RET_FAILURE;
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}
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printf("Order Seq Name Description\n");
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printf("----- --- ------------------ ------------------\n");
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/*
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* Use the ordering if we have one, so long as we are not trying to list
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* all bootmethds
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*/
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use_order = std->bootmeth_count && !all;
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if (use_order)
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dev = std->bootmeth_order[0];
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else
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ret = uclass_find_first_device(UCLASS_BOOTMETH, &dev);
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for (i = 0; dev;) {
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struct bootmeth_uc_plat *ucp = dev_get_uclass_plat(dev);
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int order = i;
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/*
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* With the -a flag we may list bootdevs that are not in the
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* ordering. Find their place in the order
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*/
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if (all && std->bootmeth_count) {
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int j;
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/* Find the position of this bootmeth in the order */
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order = -1;
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for (j = 0; j < std->bootmeth_count; j++) {
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if (std->bootmeth_order[j] == dev)
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order = j;
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}
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}
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if (ucp->flags & BOOTMETHF_GLOBAL)
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printf("%5s", "glob");
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else if (order == -1)
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printf("%5s", "-");
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else
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printf("%5x", order);
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printf(" %3x %-19.19s %s\n", dev_seq(dev), dev->name,
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ucp->desc);
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i++;
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if (use_order)
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dev = std->bootmeth_order[i];
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else
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uclass_find_next_device(&dev);
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}
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printf("----- --- ------------------ ------------------\n");
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printf("(%d bootmeth%s)\n", i, i != 1 ? "s" : "");
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return 0;
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}
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static int do_bootmeth_order(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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int ret;
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ret = bootmeth_set_order(argv[1]);
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if (ret) {
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printf("Failed (err=%d)\n", ret);
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return CMD_RET_FAILURE;
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}
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env_set("bootmeths", argv[1]);
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return 0;
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}
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static int do_bootmeth_set(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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int ret;
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if (argc < 4) {
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printf("Required parameters not provided\n");
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return CMD_RET_FAILURE;
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}
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ret = bootmeth_set_property(argv[1], argv[2], argv[3]);
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if (ret) {
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printf("Failed (err=%d)\n", ret);
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return CMD_RET_FAILURE;
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}
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return 0;
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}
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U_BOOT_LONGHELP(bootmeth,
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"list [-a] - list available bootmeths (-a all)\n"
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"bootmeth order [<bd> ...] - select bootmeth order / subset to use\n"
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"bootmeth set <bootmeth> <property> <value> - set optional property");
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U_BOOT_CMD_WITH_SUBCMDS(bootmeth, "Boot methods", bootmeth_help_text,
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U_BOOT_SUBCMD_MKENT(list, 2, 1, do_bootmeth_list),
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U_BOOT_SUBCMD_MKENT(order, CONFIG_SYS_MAXARGS, 1, do_bootmeth_order),
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U_BOOT_SUBCMD_MKENT(set, CONFIG_SYS_MAXARGS, 1, do_bootmeth_set));
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