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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * EFI setup code
- *
- * Copyright (c) 2016-2018 Alexander Graf et al.
- */
- #define LOG_CATEGORY LOGC_EFI
- #include <common.h>
- #include <efi_loader.h>
- #include <efi_variable.h>
- #include <log.h>
- #define OBJ_LIST_NOT_INITIALIZED 1
- efi_status_t efi_obj_list_initialized = OBJ_LIST_NOT_INITIALIZED;
- /*
- * Allow unaligned memory access.
- *
- * This routine is overridden by architectures providing this feature.
- */
- void __weak allow_unaligned(void)
- {
- }
- /**
- * efi_init_platform_lang() - define supported languages
- *
- * Set the PlatformLangCodes and PlatformLang variables.
- *
- * Return: status code
- */
- static efi_status_t efi_init_platform_lang(void)
- {
- efi_status_t ret;
- efi_uintn_t data_size = 0;
- char *lang = CONFIG_EFI_PLATFORM_LANG_CODES;
- char *pos;
- /*
- * Variable PlatformLangCodes defines the language codes that the
- * machine can support.
- */
- ret = efi_set_variable_int(L"PlatformLangCodes",
- &efi_global_variable_guid,
- EFI_VARIABLE_BOOTSERVICE_ACCESS |
- EFI_VARIABLE_RUNTIME_ACCESS |
- EFI_VARIABLE_READ_ONLY,
- sizeof(CONFIG_EFI_PLATFORM_LANG_CODES),
- CONFIG_EFI_PLATFORM_LANG_CODES, false);
- if (ret != EFI_SUCCESS)
- goto out;
- /*
- * Variable PlatformLang defines the language that the machine has been
- * configured for.
- */
- ret = efi_get_variable_int(L"PlatformLang",
- &efi_global_variable_guid,
- NULL, &data_size, &pos, NULL);
- if (ret == EFI_BUFFER_TOO_SMALL) {
- /* The variable is already set. Do not change it. */
- ret = EFI_SUCCESS;
- goto out;
- }
- /*
- * The list of supported languages is semicolon separated. Use the first
- * language to initialize PlatformLang.
- */
- pos = strchr(lang, ';');
- if (pos)
- *pos = 0;
- ret = efi_set_variable_int(L"PlatformLang",
- &efi_global_variable_guid,
- EFI_VARIABLE_NON_VOLATILE |
- EFI_VARIABLE_BOOTSERVICE_ACCESS |
- EFI_VARIABLE_RUNTIME_ACCESS,
- 1 + strlen(lang), lang, false);
- out:
- if (ret != EFI_SUCCESS)
- printf("EFI: cannot initialize platform language settings\n");
- return ret;
- }
- #ifdef CONFIG_EFI_SECURE_BOOT
- /**
- * efi_init_secure_boot - initialize secure boot state
- *
- * Return: status code
- */
- static efi_status_t efi_init_secure_boot(void)
- {
- efi_guid_t signature_types[] = {
- EFI_CERT_SHA256_GUID,
- EFI_CERT_X509_GUID,
- };
- efi_status_t ret;
- ret = efi_set_variable_int(L"SignatureSupport",
- &efi_global_variable_guid,
- EFI_VARIABLE_READ_ONLY |
- EFI_VARIABLE_BOOTSERVICE_ACCESS |
- EFI_VARIABLE_RUNTIME_ACCESS,
- sizeof(signature_types),
- &signature_types, false);
- if (ret != EFI_SUCCESS)
- printf("EFI: cannot initialize SignatureSupport variable\n");
- return ret;
- }
- #else
- static efi_status_t efi_init_secure_boot(void)
- {
- return EFI_SUCCESS;
- }
- #endif /* CONFIG_EFI_SECURE_BOOT */
- /**
- * efi_init_capsule - initialize capsule update state
- *
- * Return: status code
- */
- static efi_status_t efi_init_capsule(void)
- {
- efi_status_t ret = EFI_SUCCESS;
- if (IS_ENABLED(CONFIG_EFI_HAVE_CAPSULE_UPDATE)) {
- ret = efi_set_variable_int(L"CapsuleMax",
- &efi_guid_capsule_report,
- EFI_VARIABLE_READ_ONLY |
- EFI_VARIABLE_BOOTSERVICE_ACCESS |
- EFI_VARIABLE_RUNTIME_ACCESS,
- 22, L"CapsuleFFFF", false);
- if (ret != EFI_SUCCESS)
- printf("EFI: cannot initialize CapsuleMax variable\n");
- }
- return ret;
- }
- /**
- * efi_init_os_indications() - indicate supported features for OS requests
- *
- * Set the OsIndicationsSupported variable.
- *
- * Return: status code
- */
- static efi_status_t efi_init_os_indications(void)
- {
- u64 os_indications_supported = 0;
- if (IS_ENABLED(CONFIG_EFI_HAVE_CAPSULE_SUPPORT))
- os_indications_supported |=
- EFI_OS_INDICATIONS_CAPSULE_RESULT_VAR_SUPPORTED;
- if (IS_ENABLED(CONFIG_EFI_CAPSULE_ON_DISK))
- os_indications_supported |=
- EFI_OS_INDICATIONS_FILE_CAPSULE_DELIVERY_SUPPORTED;
- if (IS_ENABLED(CONFIG_EFI_CAPSULE_FIRMWARE_MANAGEMENT))
- os_indications_supported |=
- EFI_OS_INDICATIONS_FMP_CAPSULE_SUPPORTED;
- return efi_set_variable_int(L"OsIndicationsSupported",
- &efi_global_variable_guid,
- EFI_VARIABLE_BOOTSERVICE_ACCESS |
- EFI_VARIABLE_RUNTIME_ACCESS |
- EFI_VARIABLE_READ_ONLY,
- sizeof(os_indications_supported),
- &os_indications_supported, false);
- }
- /**
- * efi_clear_os_indications() - clear OsIndications
- *
- * Clear EFI_OS_INDICATIONS_FILE_CAPSULE_DELIVERY_SUPPORTED
- */
- static efi_status_t efi_clear_os_indications(void)
- {
- efi_uintn_t size;
- u64 os_indications;
- efi_status_t ret;
- size = sizeof(os_indications);
- ret = efi_get_variable_int(L"OsIndications", &efi_global_variable_guid,
- NULL, &size, &os_indications, NULL);
- if (ret != EFI_SUCCESS)
- os_indications = 0;
- else
- os_indications &=
- ~EFI_OS_INDICATIONS_FILE_CAPSULE_DELIVERY_SUPPORTED;
- ret = efi_set_variable_int(L"OsIndications", &efi_global_variable_guid,
- EFI_VARIABLE_NON_VOLATILE |
- EFI_VARIABLE_BOOTSERVICE_ACCESS |
- EFI_VARIABLE_RUNTIME_ACCESS,
- sizeof(os_indications), &os_indications,
- false);
- if (ret != EFI_SUCCESS)
- log_err("Setting %ls failed\n", L"OsIndications");
- return ret;
- }
- /**
- * efi_init_obj_list() - Initialize and populate EFI object list
- *
- * Return: status code
- */
- efi_status_t efi_init_obj_list(void)
- {
- efi_status_t r, ret = EFI_SUCCESS;
- /* Initialize once only */
- if (efi_obj_list_initialized != OBJ_LIST_NOT_INITIALIZED)
- return efi_obj_list_initialized;
- /* Allow unaligned memory access */
- allow_unaligned();
- /* Initialize root node */
- ret = efi_root_node_register();
- if (ret != EFI_SUCCESS)
- goto out;
- ret = efi_console_register();
- if (ret != EFI_SUCCESS)
- goto out;
- #ifdef CONFIG_PARTITIONS
- ret = efi_disk_register();
- if (ret != EFI_SUCCESS)
- goto out;
- #endif
- if (IS_ENABLED(CONFIG_EFI_RNG_PROTOCOL)) {
- ret = efi_rng_register();
- if (ret != EFI_SUCCESS)
- goto out;
- }
- /* Initialize variable services */
- ret = efi_init_variables();
- if (ret != EFI_SUCCESS)
- goto out;
- /* Define supported languages */
- ret = efi_init_platform_lang();
- if (ret != EFI_SUCCESS)
- goto out;
- /* Indicate supported features */
- ret = efi_init_os_indications();
- if (ret != EFI_SUCCESS)
- goto out;
- /* Initialize system table */
- ret = efi_initialize_system_table();
- if (ret != EFI_SUCCESS)
- goto out;
- if (IS_ENABLED(CONFIG_EFI_ESRT)) {
- ret = efi_esrt_register();
- if (ret != EFI_SUCCESS)
- goto out;
- }
- if (IS_ENABLED(CONFIG_EFI_TCG2_PROTOCOL)) {
- ret = efi_tcg2_register();
- if (ret != EFI_SUCCESS)
- goto out;
- }
- if (IS_ENABLED(CONFIG_EFI_RISCV_BOOT_PROTOCOL)) {
- ret = efi_riscv_register();
- if (ret != EFI_SUCCESS)
- goto out;
- }
- /* Secure boot */
- ret = efi_init_secure_boot();
- if (ret != EFI_SUCCESS)
- goto out;
- /* Indicate supported runtime services */
- ret = efi_init_runtime_supported();
- if (ret != EFI_SUCCESS)
- goto out;
- /* Initialize EFI driver uclass */
- ret = efi_driver_init();
- if (ret != EFI_SUCCESS)
- goto out;
- if (IS_ENABLED(CONFIG_EFI_HAVE_CAPSULE_SUPPORT)) {
- ret = efi_load_capsule_drivers();
- if (ret != EFI_SUCCESS)
- goto out;
- }
- #if defined(CONFIG_LCD) || defined(CONFIG_DM_VIDEO)
- ret = efi_gop_register();
- if (ret != EFI_SUCCESS)
- goto out;
- #endif
- #ifdef CONFIG_NET
- ret = efi_net_register();
- if (ret != EFI_SUCCESS)
- goto out;
- #endif
- #ifdef CONFIG_GENERATE_ACPI_TABLE
- ret = efi_acpi_register();
- if (ret != EFI_SUCCESS)
- goto out;
- #endif
- #ifdef CONFIG_GENERATE_SMBIOS_TABLE
- ret = efi_smbios_register();
- if (ret != EFI_SUCCESS)
- goto out;
- #endif
- ret = efi_watchdog_register();
- if (ret != EFI_SUCCESS)
- goto out;
- ret = efi_init_capsule();
- if (ret != EFI_SUCCESS)
- goto out;
- /* Initialize EFI runtime services */
- ret = efi_reset_system_init();
- if (ret != EFI_SUCCESS)
- goto out;
- /* Execute capsules after reboot */
- if (IS_ENABLED(CONFIG_EFI_CAPSULE_ON_DISK) &&
- !IS_ENABLED(CONFIG_EFI_CAPSULE_ON_DISK_EARLY))
- ret = efi_launch_capsules();
- out:
- r = efi_clear_os_indications();
- if (ret == EFI_SUCCESS)
- ret = r;
- efi_obj_list_initialized = ret;
- return ret;
- }
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