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_loader.h>
  11
  12const efi_guid_t efi_u_boot_guid = U_BOOT_GUID;
  13
  14efi_handle_t efi_root = NULL;
  15
  16struct efi_root_dp {
  17        struct efi_device_path_vendor vendor;
  18        struct efi_device_path end;
  19} __packed;
  20
  21/**
  22 * efi_root_node_register() - create root node
  23 *
  24 * Create the root node on which we install all protocols that are
  25 * not related to a loaded image or a driver.
  26 *
  27 * Return:      status code
  28 */
  29efi_status_t efi_root_node_register(void)
  30{
  31        efi_status_t ret;
  32        struct efi_root_dp *dp;
  33
  34        /* Create device path protocol */
  35        dp = calloc(1, sizeof(*dp));
  36        if (!dp)
  37                return EFI_OUT_OF_RESOURCES;
  38
  39        /* Fill vendor node */
  40        dp->vendor.dp.type = DEVICE_PATH_TYPE_HARDWARE_DEVICE;
  41        dp->vendor.dp.sub_type = DEVICE_PATH_SUB_TYPE_VENDOR;
  42        dp->vendor.dp.length = sizeof(struct efi_device_path_vendor);
  43        dp->vendor.guid = efi_u_boot_guid;
  44
  45        /* Fill end node */
  46        dp->end.type = DEVICE_PATH_TYPE_END;
  47        dp->end.sub_type = DEVICE_PATH_SUB_TYPE_END;
  48        dp->end.length = sizeof(struct efi_device_path);
  49
  50        /* Create root node and install protocols */
  51        ret = EFI_CALL(efi_install_multiple_protocol_interfaces
  52                        (&efi_root,
  53                         /* Device path protocol */
  54                         &efi_guid_device_path, dp,
  55#if CONFIG_IS_ENABLED(EFI_DEVICE_PATH_TO_TEXT)
  56                         /* Device path to text protocol */
  57                         &efi_guid_device_path_to_text_protocol,
  58                         (void *)&efi_device_path_to_text,
  59#endif
  60                         /* Device path utilities protocol */
  61                         &efi_guid_device_path_utilities_protocol,
  62                         (void *)&efi_device_path_utilities,
  63#if CONFIG_IS_ENABLED(EFI_UNICODE_COLLATION_PROTOCOL2)
  64#if CONFIG_IS_ENABLED(EFI_UNICODE_COLLATION_PROTOCOL)
  65                         /* Deprecated Unicode collation protocol */
  66                         &efi_guid_unicode_collation_protocol,
  67                         (void *)&efi_unicode_collation_protocol,
  68#endif
  69                         /* Current Unicode collation protocol */
  70                         &efi_guid_unicode_collation_protocol2,
  71                         (void *)&efi_unicode_collation_protocol2,
  72#endif
  73#if CONFIG_IS_ENABLED(EFI_LOADER_HII)
  74                         /* HII string protocol */
  75                         &efi_guid_hii_string_protocol,
  76                         (void *)&efi_hii_string,
  77                         /* HII database protocol */
  78                         &efi_guid_hii_database_protocol,
  79                         (void *)&efi_hii_database,
  80                         /* HII configuration routing protocol */
  81                         &efi_guid_hii_config_routing_protocol,
  82                         (void *)&efi_hii_config_routing,
  83#endif
  84                         NULL));
  85        efi_root->type = EFI_OBJECT_TYPE_U_BOOT_FIRMWARE;
  86        return ret;
  87}
  88