efi_setup.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* EFI setup code
*
* Copyright (c) 2016-2018 Alexander Graf et al.
*/
#include <common.h>
#include <bootm.h>
#include <efi_loader.h>
#define OBJ_LIST_NOT_INITIALIZED 1
static 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_CALL(efi_set_variable(L"PlatformLangCodes",
&efi_global_variable_guid,
EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS,
sizeof(CONFIG_EFI_PLATFORM_LANG_CODES),
CONFIG_EFI_PLATFORM_LANG_CODES));
if (ret != EFI_SUCCESS)
goto out;
/*
* Variable PlatformLang defines the language that the machine has been
* configured for.
*/
ret = EFI_CALL(efi_get_variable(L"PlatformLang",
&efi_global_variable_guid,
NULL, &data_size, &pos));
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_CALL(efi_set_variable(L"PlatformLang",
&efi_global_variable_guid,
EFI_VARIABLE_NON_VOLATILE |
EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS,
1 + strlen(lang), lang));
out:
if (ret != EFI_SUCCESS)
printf("EFI: cannot initialize platform language settings\n");
return ret;
}
/**
* efi_init_obj_list() - Initialize and populate EFI object list
*
* Return: status code
*/
efi_status_t efi_init_obj_list(void)
{
u64 os_indications_supported = 0; /* None */
efi_status_t 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();
/* On ARM switch from EL3 or secure mode to EL2 or non-secure mode */
switch_to_non_secure_mode();
/* 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_CALL(efi_set_variable(L"OsIndicationsSupported",
&efi_global_variable_guid,
EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS,
sizeof(os_indications_supported),
&os_indications_supported));
if (ret != EFI_SUCCESS)
goto out;
/* Initialize system table */
ret = efi_initialize_system_table();
if (ret != EFI_SUCCESS)
goto out;
/* Indicate supported runtime services */
ret = efi_init_runtime_supported();
if (ret != EFI_SUCCESS)
goto out;
/* Initialize root node */
ret = efi_root_node_register();
if (ret != EFI_SUCCESS)
goto out;
/* Initialize EFI driver uclass */
ret = efi_driver_init();
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 defined(CONFIG_LCD) || defined(CONFIG_DM_VIDEO)
ret = efi_gop_register();
if (ret != EFI_SUCCESS)
goto out;
#endif
#ifdef CONFIG_EFI_LOAD_FILE2_INITRD
ret = efi_initrd_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;
/* Initialize EFI runtime services */
ret = efi_reset_system_init();
if (ret != EFI_SUCCESS)
goto out;
out:
efi_obj_list_initialized = ret;
return ret;
}