lib/efi_loader/efi_setup.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  *  EFI setup code
   4  *
   5  *  Copyright (c) 2016-2018 Alexander Graf et al.
   6  */
   7
   8 #include <common.h>
   9 #include <efi_loader.h>
  10
  11 #define OBJ_LIST_NOT_INITIALIZED 1
  12
  13 /* Language code for American English according to RFC 4646 */
  14 #define EN_US L"en-US"
  15
  16 static efi_status_t efi_obj_list_initialized = OBJ_LIST_NOT_INITIALIZED;
  17
  18 /* Initialize and populate EFI object list */
  19 efi_status_t efi_init_obj_list(void)
  20 {
  21         efi_status_t ret = EFI_SUCCESS;
  22
  23         /*
  24          * On the ARM architecture gd is mapped to a fixed register (r9 or x18).
  25          * As this register may be overwritten by an EFI payload we save it here
  26          * and restore it on every callback entered.
  27          */
  28         efi_save_gd();
  29
  30         /*
  31          * Variable PlatformLang defines the language that the machine has been
  32          * configured for.
  33          */
  34         ret = EFI_CALL(efi_set_variable(L"PlatformLang",
  35                                         &efi_global_variable_guid,
  36                                         EFI_VARIABLE_BOOTSERVICE_ACCESS |
  37                                         EFI_VARIABLE_RUNTIME_ACCESS,
  38                                         sizeof(EN_US), EN_US));
  39         if (ret != EFI_SUCCESS)
  40                 goto out;
  41
  42         /*
  43          * Variable PlatformLangCodes defines the language codes that the
  44          * machine can support.
  45          */
  46         ret = EFI_CALL(efi_set_variable(L"PlatformLangCodes",
  47                                         &efi_global_variable_guid,
  48                                         EFI_VARIABLE_BOOTSERVICE_ACCESS |
  49                                         EFI_VARIABLE_RUNTIME_ACCESS,
  50                                         sizeof(EN_US), EN_US));
  51         if (ret != EFI_SUCCESS)
  52                 goto out;
  53
  54         /* Initialize once only */
  55         if (efi_obj_list_initialized != OBJ_LIST_NOT_INITIALIZED)
  56                 return efi_obj_list_initialized;
  57
  58         /* Initialize system table */
  59         ret = efi_initialize_system_table();
  60         if (ret != EFI_SUCCESS)
  61                 goto out;
  62
  63         /* Initialize root node */
  64         ret = efi_root_node_register();
  65         if (ret != EFI_SUCCESS)
  66                 goto out;
  67
  68         /* Initialize EFI driver uclass */
  69         ret = efi_driver_init();
  70         if (ret != EFI_SUCCESS)
  71                 goto out;
  72
  73         ret = efi_console_register();
  74         if (ret != EFI_SUCCESS)
  75                 goto out;
  76 #ifdef CONFIG_PARTITIONS
  77         ret = efi_disk_register();
  78         if (ret != EFI_SUCCESS)
  79                 goto out;
  80 #endif
  81 #if defined(CONFIG_LCD) || defined(CONFIG_DM_VIDEO)
  82         ret = efi_gop_register();
  83         if (ret != EFI_SUCCESS)
  84                 goto out;
  85 #endif
  86 #ifdef CONFIG_NET
  87         ret = efi_net_register();
  88         if (ret != EFI_SUCCESS)
  89                 goto out;
  90 #endif
  91 #ifdef CONFIG_GENERATE_ACPI_TABLE
  92         ret = efi_acpi_register();
  93         if (ret != EFI_SUCCESS)
  94                 goto out;
  95 #endif
  96 #ifdef CONFIG_GENERATE_SMBIOS_TABLE
  97         ret = efi_smbios_register();
  98         if (ret != EFI_SUCCESS)
  99                 goto out;
 100 #endif
 101         ret = efi_watchdog_register();
 102         if (ret != EFI_SUCCESS)
 103                 goto out;
 104
 105         /* Initialize EFI runtime services */
 106         ret = efi_reset_system_init();
 107         if (ret != EFI_SUCCESS)
 108                 goto out;
 109
 110 out:
 111         efi_obj_list_initialized = ret;
 112         return ret;
 113 }