1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Bootmethod for EFI boot manager
4 *
5 * Copyright 2021 Google LLC
6 * Written by Simon Glass <sjg@chromium.org>
7 */
8
9 #define LOG_CATEGORY UCLASS_BOOTSTD
10
11 #include <common.h>
12 #include <bootdev.h>
13 #include <bootflow.h>
14 #include <bootmeth.h>
15 #include <command.h>
16 #include <dm.h>
17
18 /**
19 * struct efi_mgr_priv - private info for the efi-mgr driver
20 *
21 * @fake_bootflow: Fake a valid bootflow for testing
22 */
23 struct efi_mgr_priv {
24 bool fake_dev;
25 };
26
sandbox_set_fake_efi_mgr_dev(struct udevice * dev,bool fake_dev)27 void sandbox_set_fake_efi_mgr_dev(struct udevice *dev, bool fake_dev)
28 {
29 struct efi_mgr_priv *priv = dev_get_priv(dev);
30
31 priv->fake_dev = fake_dev;
32 }
33
efi_mgr_check(struct udevice * dev,struct bootflow_iter * iter)34 static int efi_mgr_check(struct udevice *dev, struct bootflow_iter *iter)
35 {
36 int ret;
37
38 /* Must be an bootstd device */
39 ret = bootflow_iter_check_system(iter);
40 if (ret)
41 return log_msg_ret("net", ret);
42
43 return 0;
44 }
45
efi_mgr_read_bootflow(struct udevice * dev,struct bootflow * bflow)46 static int efi_mgr_read_bootflow(struct udevice *dev, struct bootflow *bflow)
47 {
48 struct efi_mgr_priv *priv = dev_get_priv(dev);
49
50 if (priv->fake_dev) {
51 bflow->state = BOOTFLOWST_READY;
52 return 0;
53 }
54
55 /* To be implemented */
56
57 return -EINVAL;
58 }
59
efi_mgr_read_file(struct udevice * dev,struct bootflow * bflow,const char * file_path,ulong addr,ulong * sizep)60 static int efi_mgr_read_file(struct udevice *dev, struct bootflow *bflow,
61 const char *file_path, ulong addr, ulong *sizep)
62 {
63 /* Files are loaded by the 'bootefi bootmgr' command */
64
65 return -ENOSYS;
66 }
67
efi_mgr_boot(struct udevice * dev,struct bootflow * bflow)68 static int efi_mgr_boot(struct udevice *dev, struct bootflow *bflow)
69 {
70 int ret;
71
72 /* Booting is handled by the 'bootefi bootmgr' command */
73 ret = run_command("bootefi bootmgr", 0);
74
75 return 0;
76 }
77
bootmeth_efi_mgr_bind(struct udevice * dev)78 static int bootmeth_efi_mgr_bind(struct udevice *dev)
79 {
80 struct bootmeth_uc_plat *plat = dev_get_uclass_plat(dev);
81
82 plat->desc = "EFI bootmgr flow";
83 plat->flags = BOOTMETHF_GLOBAL;
84
85 return 0;
86 }
87
88 static struct bootmeth_ops efi_mgr_bootmeth_ops = {
89 .check = efi_mgr_check,
90 .read_bootflow = efi_mgr_read_bootflow,
91 .read_file = efi_mgr_read_file,
92 .boot = efi_mgr_boot,
93 };
94
95 static const struct udevice_id efi_mgr_bootmeth_ids[] = {
96 { .compatible = "u-boot,efi-bootmgr" },
97 { }
98 };
99
100 U_BOOT_DRIVER(bootmeth_efi_mgr) = {
101 .name = "bootmeth_efi_mgr",
102 .id = UCLASS_BOOTMETH,
103 .of_match = efi_mgr_bootmeth_ids,
104 .ops = &efi_mgr_bootmeth_ops,
105 .bind = bootmeth_efi_mgr_bind,
106 .priv_auto = sizeof(struct efi_mgr_priv),
107 };
108