1 // SPDX-License-Identifier: GPL-2.0+
5 * Copyright (c) 2016-2018 Alexander Graf et al.
10 #include <efi_loader.h>
11 #include <efi_variable.h>
13 #define OBJ_LIST_NOT_INITIALIZED 1
15 efi_status_t efi_obj_list_initialized = OBJ_LIST_NOT_INITIALIZED;
18 * Allow unaligned memory access.
20 * This routine is overridden by architectures providing this feature.
22 void __weak allow_unaligned(void)
27 * efi_init_platform_lang() - define supported languages
29 * Set the PlatformLangCodes and PlatformLang variables.
33 static efi_status_t efi_init_platform_lang(void)
36 efi_uintn_t data_size = 0;
37 char *lang = CONFIG_EFI_PLATFORM_LANG_CODES;
41 * Variable PlatformLangCodes defines the language codes that the
42 * machine can support.
44 ret = efi_set_variable_int(L"PlatformLangCodes",
45 &efi_global_variable_guid,
46 EFI_VARIABLE_BOOTSERVICE_ACCESS |
47 EFI_VARIABLE_RUNTIME_ACCESS |
48 EFI_VARIABLE_READ_ONLY,
49 sizeof(CONFIG_EFI_PLATFORM_LANG_CODES),
50 CONFIG_EFI_PLATFORM_LANG_CODES, false);
51 if (ret != EFI_SUCCESS)
55 * Variable PlatformLang defines the language that the machine has been
58 ret = efi_get_variable_int(L"PlatformLang",
59 &efi_global_variable_guid,
60 NULL, &data_size, &pos, NULL);
61 if (ret == EFI_BUFFER_TOO_SMALL) {
62 /* The variable is already set. Do not change it. */
68 * The list of supported languages is semicolon separated. Use the first
69 * language to initialize PlatformLang.
71 pos = strchr(lang, ';');
75 ret = efi_set_variable_int(L"PlatformLang",
76 &efi_global_variable_guid,
77 EFI_VARIABLE_NON_VOLATILE |
78 EFI_VARIABLE_BOOTSERVICE_ACCESS |
79 EFI_VARIABLE_RUNTIME_ACCESS,
80 1 + strlen(lang), lang, false);
82 if (ret != EFI_SUCCESS)
83 printf("EFI: cannot initialize platform language settings\n");
87 #ifdef CONFIG_EFI_SECURE_BOOT
89 * efi_init_secure_boot - initialize secure boot state
93 static efi_status_t efi_init_secure_boot(void)
95 efi_guid_t signature_types[] = {
101 ret = efi_set_variable_int(L"SignatureSupport",
102 &efi_global_variable_guid,
103 EFI_VARIABLE_BOOTSERVICE_ACCESS |
104 EFI_VARIABLE_RUNTIME_ACCESS |
105 EFI_VARIABLE_READ_ONLY,
106 sizeof(signature_types),
107 &signature_types, false);
108 if (ret != EFI_SUCCESS)
109 printf("EFI: cannot initialize SignatureSupport variable\n");
114 static efi_status_t efi_init_secure_boot(void)
118 #endif /* CONFIG_EFI_SECURE_BOOT */
121 * efi_init_obj_list() - Initialize and populate EFI object list
123 * Return: status code
125 efi_status_t efi_init_obj_list(void)
127 u64 os_indications_supported = 0; /* None */
128 efi_status_t ret = EFI_SUCCESS;
130 /* Initialize once only */
131 if (efi_obj_list_initialized != OBJ_LIST_NOT_INITIALIZED)
132 return efi_obj_list_initialized;
134 /* Allow unaligned memory access */
137 /* On ARM switch from EL3 or secure mode to EL2 or non-secure mode */
138 switch_to_non_secure_mode();
140 /* Initialize root node */
141 ret = efi_root_node_register();
142 if (ret != EFI_SUCCESS)
145 ret = efi_console_register();
146 if (ret != EFI_SUCCESS)
149 #ifdef CONFIG_PARTITIONS
150 ret = efi_disk_register();
151 if (ret != EFI_SUCCESS)
154 if (IS_ENABLED(CONFIG_EFI_RNG_PROTOCOL)) {
155 ret = efi_rng_register();
156 if (ret != EFI_SUCCESS)
160 if (IS_ENABLED(CONFIG_EFI_TCG2_PROTOCOL)) {
161 ret = efi_tcg2_register();
162 if (ret != EFI_SUCCESS)
166 /* Initialize variable services */
167 ret = efi_init_variables();
168 if (ret != EFI_SUCCESS)
171 /* Define supported languages */
172 ret = efi_init_platform_lang();
173 if (ret != EFI_SUCCESS)
176 /* Indicate supported features */
177 ret = efi_set_variable_int(L"OsIndicationsSupported",
178 &efi_global_variable_guid,
179 EFI_VARIABLE_BOOTSERVICE_ACCESS |
180 EFI_VARIABLE_RUNTIME_ACCESS |
181 EFI_VARIABLE_READ_ONLY,
182 sizeof(os_indications_supported),
183 &os_indications_supported, false);
184 if (ret != EFI_SUCCESS)
187 /* Initialize system table */
188 ret = efi_initialize_system_table();
189 if (ret != EFI_SUCCESS)
193 ret = efi_init_secure_boot();
194 if (ret != EFI_SUCCESS)
197 /* Indicate supported runtime services */
198 ret = efi_init_runtime_supported();
199 if (ret != EFI_SUCCESS)
202 /* Initialize EFI driver uclass */
203 ret = efi_driver_init();
204 if (ret != EFI_SUCCESS)
207 #if defined(CONFIG_LCD) || defined(CONFIG_DM_VIDEO)
208 ret = efi_gop_register();
209 if (ret != EFI_SUCCESS)
212 #ifdef CONFIG_EFI_LOAD_FILE2_INITRD
213 ret = efi_initrd_register();
214 if (ret != EFI_SUCCESS)
218 ret = efi_net_register();
219 if (ret != EFI_SUCCESS)
222 #ifdef CONFIG_GENERATE_ACPI_TABLE
223 ret = efi_acpi_register();
224 if (ret != EFI_SUCCESS)
227 #ifdef CONFIG_GENERATE_SMBIOS_TABLE
228 ret = efi_smbios_register();
229 if (ret != EFI_SUCCESS)
232 ret = efi_watchdog_register();
233 if (ret != EFI_SUCCESS)
236 /* Initialize EFI runtime services */
237 ret = efi_reset_system_init();
238 if (ret != EFI_SUCCESS)
242 efi_obj_list_initialized = ret;