u-boot/lib/efi_loader/efi_setup.c

// SPDX-License-Identifier: GPL-2.0+
/*
 *  EFI setup code
 *
 *  Copyright (c) 2016-2018 Alexander Graf et al.
 */

#include <common.h>
#include <efi_loader.h>

#define OBJ_LIST_NOT_INITIALIZED 1

/* Language code for American English according to RFC 4646 */
#define EN_US L"en-US"

static efi_status_t efi_obj_list_initialized = OBJ_LIST_NOT_INITIALIZED;

/* Initialize and populate EFI object list */
efi_status_t efi_init_obj_list(void)
{
	efi_status_t ret = EFI_SUCCESS;

	/*
	 * On the ARM architecture gd is mapped to a fixed register (r9 or x18).
	 * As this register may be overwritten by an EFI payload we save it here
	 * and restore it on every callback entered.
	 */
	efi_save_gd();

	/*
	 * Variable PlatformLang defines the language that the machine has been
	 * configured for.
	 */
	ret = EFI_CALL(efi_set_variable(L"PlatformLang",
					&efi_global_variable_guid,
					EFI_VARIABLE_BOOTSERVICE_ACCESS |
					EFI_VARIABLE_RUNTIME_ACCESS,
					sizeof(EN_US), EN_US));
	if (ret != EFI_SUCCESS)
		goto out;

	/*
	 * 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(EN_US), EN_US));
	if (ret != EFI_SUCCESS)
		goto out;

	/* Initialize once only */
	if (efi_obj_list_initialized != OBJ_LIST_NOT_INITIALIZED)
		return efi_obj_list_initialized;

	/* Initialize system table */
	ret = efi_initialize_system_table();
	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_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;
}