Open Menu / boot / bootmeth_efi_mgr.c
Loading...
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
// SPDX-License-Identifier: GPL-2.0+
/*
 * Bootmethod for EFI boot manager
 *
 * Copyright 2021 Google LLC
 * Written by Simon Glass <sjg@chromium.org>
 */

#define LOG_CATEGORY UCLASS_BOOTSTD

#include <common.h>
#include <bootdev.h>
#include <bootflow.h>
#include <bootmeth.h>
#include <command.h>
#include <dm.h>

/**
 * struct efi_mgr_priv - private info for the efi-mgr driver
 *
 * @fake_bootflow: Fake a valid bootflow for testing
 */
struct efi_mgr_priv {
	bool fake_dev;
};

void sandbox_set_fake_efi_mgr_dev(struct udevice *dev, bool fake_dev)
{
	struct efi_mgr_priv *priv = dev_get_priv(dev);

	priv->fake_dev = fake_dev;
}

static int efi_mgr_check(struct udevice *dev, struct bootflow_iter *iter)
{
	int ret;

	/* Must be an bootstd device */
	ret = bootflow_iter_check_system(iter);
	if (ret)
		return log_msg_ret("net", ret);

	return 0;
}

static int efi_mgr_read_bootflow(struct udevice *dev, struct bootflow *bflow)
{
	struct efi_mgr_priv *priv = dev_get_priv(dev);

	if (priv->fake_dev) {
		bflow->state = BOOTFLOWST_READY;
		return 0;
	}

	/* To be implemented */

	return -EINVAL;
}

static int efi_mgr_read_file(struct udevice *dev, struct bootflow *bflow,
				const char *file_path, ulong addr, ulong *sizep)
{
	/* Files are loaded by the 'bootefi bootmgr' command */

	return -ENOSYS;
}

static int efi_mgr_boot(struct udevice *dev, struct bootflow *bflow)
{
	int ret;

	/* Booting is handled by the 'bootefi bootmgr' command */
	ret = run_command("bootefi bootmgr", 0);

	return 0;
}

static int bootmeth_efi_mgr_bind(struct udevice *dev)
{
	struct bootmeth_uc_plat *plat = dev_get_uclass_plat(dev);

	plat->desc = "EFI bootmgr flow";
	plat->flags = BOOTMETHF_GLOBAL;

	return 0;
}

static struct bootmeth_ops efi_mgr_bootmeth_ops = {
	.check		= efi_mgr_check,
	.read_bootflow	= efi_mgr_read_bootflow,
	.read_file	= efi_mgr_read_file,
	.boot		= efi_mgr_boot,
};

static const struct udevice_id efi_mgr_bootmeth_ids[] = {
	{ .compatible = "u-boot,efi-bootmgr" },
	{ }
};

U_BOOT_DRIVER(bootmeth_efi_mgr) = {
	.name		= "bootmeth_efi_mgr",
	.id		= UCLASS_BOOTMETH,
	.of_match	= efi_mgr_bootmeth_ids,
	.ops		= &efi_mgr_bootmeth_ops,
	.bind		= bootmeth_efi_mgr_bind,
	.priv_auto	= sizeof(struct efi_mgr_priv),
};