LXR uboot/lib/efi_loader/efi_root

   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
  13const efi_guid_t efi_u_boot_guid = U_BOOT_GUID;
  14
  15efi_handle_t efi_root = NULL;
  16
  17struct 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 */
  30efi_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