mirror of
https://github.com/u-boot/u-boot.git
synced 2024-11-30 08:03:32 +08:00
d9409244b3
Add a bootmeth driver which handles distro boot from a disk via a U-Boot script, so we can boot a bootflow using this commonly used mechanism. This is required by Armbian, for example. Signed-off-by: Simon Glass <sjg@chromium.org>
140 lines
3.2 KiB
C
140 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Bootmethod for booting via a U-Boot script
|
|
*
|
|
* Copyright 2021 Google LLC
|
|
* Written by Simon Glass <sjg@chromium.org>
|
|
*/
|
|
|
|
#define LOG_CATEGORY UCLASS_BOOTSTD
|
|
|
|
#include <common.h>
|
|
#include <blk.h>
|
|
#include <bootflow.h>
|
|
#include <bootmeth.h>
|
|
#include <bootstd.h>
|
|
#include <dm.h>
|
|
#include <env.h>
|
|
#include <fs.h>
|
|
#include <image.h>
|
|
#include <malloc.h>
|
|
#include <mapmem.h>
|
|
|
|
#define SCRIPT_FNAME1 "boot.scr.uimg"
|
|
#define SCRIPT_FNAME2 "boot.scr"
|
|
|
|
static int script_check(struct udevice *dev, struct bootflow_iter *iter)
|
|
{
|
|
int ret;
|
|
|
|
/* This only works on block devices */
|
|
ret = bootflow_iter_uses_blk_dev(iter);
|
|
if (ret)
|
|
return log_msg_ret("blk", ret);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int script_read_bootflow(struct udevice *dev, struct bootflow *bflow)
|
|
{
|
|
struct blk_desc *desc = NULL;
|
|
const char *const *prefixes;
|
|
struct udevice *bootstd;
|
|
const char *prefix;
|
|
int ret, i;
|
|
|
|
ret = uclass_first_device_err(UCLASS_BOOTSTD, &bootstd);
|
|
if (ret)
|
|
return log_msg_ret("std", ret);
|
|
|
|
/* We require a partition table */
|
|
if (!bflow->part)
|
|
return -ENOENT;
|
|
|
|
if (bflow->blk)
|
|
desc = dev_get_uclass_plat(bflow->blk);
|
|
|
|
prefixes = bootstd_get_prefixes(bootstd);
|
|
i = 0;
|
|
do {
|
|
prefix = prefixes ? prefixes[i] : NULL;
|
|
|
|
ret = bootmeth_try_file(bflow, desc, prefix, SCRIPT_FNAME1);
|
|
if (ret)
|
|
ret = bootmeth_try_file(bflow, desc, prefix,
|
|
SCRIPT_FNAME2);
|
|
} while (ret && prefixes && prefixes[++i]);
|
|
if (ret)
|
|
return log_msg_ret("try", ret);
|
|
|
|
bflow->subdir = strdup(prefix ? prefix : "");
|
|
if (!bflow->subdir)
|
|
return log_msg_ret("prefix", -ENOMEM);
|
|
|
|
ret = bootmeth_alloc_file(bflow, 0x10000, 1);
|
|
if (ret)
|
|
return log_msg_ret("read", ret);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int script_boot(struct udevice *dev, struct bootflow *bflow)
|
|
{
|
|
struct blk_desc *desc = dev_get_uclass_plat(bflow->blk);
|
|
ulong addr;
|
|
int ret;
|
|
|
|
ret = env_set("devtype", blk_get_devtype(bflow->blk));
|
|
if (!ret)
|
|
ret = env_set_hex("devnum", desc->devnum);
|
|
if (!ret)
|
|
ret = env_set("prefix", bflow->subdir);
|
|
if (!ret && IS_ENABLED(CONFIG_ARCH_SUNXI) &&
|
|
!strcmp("mmc", blk_get_devtype(bflow->blk)))
|
|
ret = env_set_hex("mmc_bootdev", desc->devnum);
|
|
if (ret)
|
|
return log_msg_ret("env", ret);
|
|
|
|
log_debug("devtype: %s\n", env_get("devtype"));
|
|
log_debug("devnum: %s\n", env_get("devnum"));
|
|
log_debug("prefix: %s\n", env_get("prefix"));
|
|
log_debug("mmc_bootdev: %s\n", env_get("mmc_bootdev"));
|
|
|
|
addr = map_to_sysmem(bflow->buf);
|
|
ret = image_source_script(addr, NULL);
|
|
if (ret)
|
|
return log_msg_ret("boot", ret);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int script_bootmeth_bind(struct udevice *dev)
|
|
{
|
|
struct bootmeth_uc_plat *plat = dev_get_uclass_plat(dev);
|
|
|
|
plat->desc = IS_ENABLED(CONFIG_BOOTSTD_FULL) ?
|
|
"Script boot from a block device" : "script";
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct bootmeth_ops script_bootmeth_ops = {
|
|
.check = script_check,
|
|
.read_bootflow = script_read_bootflow,
|
|
.read_file = bootmeth_common_read_file,
|
|
.boot = script_boot,
|
|
};
|
|
|
|
static const struct udevice_id script_bootmeth_ids[] = {
|
|
{ .compatible = "u-boot,script" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(bootmeth_script) = {
|
|
.name = "bootmeth_script",
|
|
.id = UCLASS_BOOTMETH,
|
|
.of_match = script_bootmeth_ids,
|
|
.ops = &script_bootmeth_ops,
|
|
.bind = script_bootmeth_bind,
|
|
};
|