1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Root node for system services
4 *
5 * Copyright (c) 2018 Heinrich Schuchardt
6 */
7
8 #include <common.h>
9 #include <malloc.h>
10 #include <efi_dt_fixup.h>
11 #include <efi_loader.h>
12
13 const efi_guid_t efi_u_boot_guid = U_BOOT_GUID;
14
15 efi_handle_t efi_root = NULL;
16
17 struct efi_root_dp {
18 struct efi_device_path_vendor vendor;
19 struct efi_device_path end;
20 } __packed;
21
22 /**
23 * efi_root_node_register() - create root node
24 *
25 * Create the root node on which we install all protocols that are
26 * not related to a loaded image or a driver.
27 *
28 * Return: status code
29 */
efi_root_node_register(void)30 efi_status_t efi_root_node_register(void)
31 {
32 efi_status_t ret;
33 struct efi_root_dp *dp;
34
35 /* Create device path protocol */
36 dp = calloc(1, sizeof(*dp));
37 if (!dp)
38 return EFI_OUT_OF_RESOURCES;
39
40 /* Fill vendor node */
41 dp->vendor.dp.type = DEVICE_PATH_TYPE_HARDWARE_DEVICE;
42 dp->vendor.dp.sub_type = DEVICE_PATH_SUB_TYPE_VENDOR;
43 dp->vendor.dp.length = sizeof(struct efi_device_path_vendor);
44 dp->vendor.guid = efi_u_boot_guid;
45
46 /* Fill end node */
47 dp->end.type = DEVICE_PATH_TYPE_END;
48 dp->end.sub_type = DEVICE_PATH_SUB_TYPE_END;
49 dp->end.length = sizeof(struct efi_device_path);
50
51 /* Create root node and install protocols */
52 ret = EFI_CALL(efi_install_multiple_protocol_interfaces
53 (&efi_root,
54 /* Device path protocol */
55 &efi_guid_device_path, dp,
56 #if CONFIG_IS_ENABLED(EFI_DEVICE_PATH_TO_TEXT)
57 /* Device path to text protocol */
58 &efi_guid_device_path_to_text_protocol,
59 (void *)&efi_device_path_to_text,
60 #endif
61 #ifdef CONFIG_EFI_DEVICE_PATH_UTIL
62 /* Device path utilities protocol */
63 &efi_guid_device_path_utilities_protocol,
64 (void *)&efi_device_path_utilities,
65 #endif
66 #ifdef CONFIG_EFI_DT_FIXUP
67 /* Device-tree fix-up protocol */
68 &efi_guid_dt_fixup_protocol,
69 (void *)&efi_dt_fixup_prot,
70 #endif
71 #if CONFIG_IS_ENABLED(EFI_UNICODE_COLLATION_PROTOCOL2)
72 &efi_guid_unicode_collation_protocol2,
73 (void *)&efi_unicode_collation_protocol2,
74 #endif
75 #if CONFIG_IS_ENABLED(EFI_LOADER_HII)
76 /* HII string protocol */
77 &efi_guid_hii_string_protocol,
78 (void *)&efi_hii_string,
79 /* HII database protocol */
80 &efi_guid_hii_database_protocol,
81 (void *)&efi_hii_database,
82 #endif
83 NULL));
84 efi_root->type = EFI_OBJECT_TYPE_U_BOOT_FIRMWARE;
85 return ret;
86 }
87