Vlv2TbltDevicePkg/SmBiosMiscDxe/MiscSystemOptionStringFunction.c

   1 /*++
   2
   3 Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>
   4
   5   SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7
   8
   9
  10 Module Name:
  11
  12   MiscSystemOptionStringFunction.c
  13
  14 Abstract:
  15
  16   BIOS system option string boot time changes.
  17   SMBIOS type 12.
  18
  19 --*/
  20
  21
  22 #include "CommonHeader.h"
  23
  24 #include "MiscSubclassDriver.h"
  25
  26
  27 /**
  28   This function makes boot time changes to the contents of the
  29   MiscSystemOptionString (Type 12).
  30
  31   @param  RecordData                 Pointer to copy of RecordData from the Data Table.
  32
  33   @retval EFI_SUCCESS                All parameters were valid.
  34   @retval EFI_UNSUPPORTED            Unexpected RecordType value.
  35   @retval EFI_INVALID_PARAMETER      Invalid parameter was found.
  36
  37 **/
  38 MISC_SMBIOS_TABLE_FUNCTION(SystemOptionString)
  39 {
  40   CHAR8                             *OptionalStrStart;
  41   UINTN                             OptStrLen;
  42   EFI_STRING                        OptionString;
  43   EFI_STATUS                        Status;
  44   STRING_REF                        TokenToGet;
  45   EFI_SMBIOS_HANDLE                 SmbiosHandle;
  46   SMBIOS_TABLE_TYPE12               *SmbiosRecord;
  47
  48   //
  49   // First check for invalid parameters.
  50   //
  51   if (RecordData == NULL) {
  52     return EFI_INVALID_PARAMETER;
  53   }
  54
  55   TokenToGet = STRING_TOKEN (STR_MISC_SYSTEM_OPTION_EN_US);
  56   OptionString = SmbiosMiscGetString (TokenToGet);
  57   OptStrLen = StrLen(OptionString);
  58   if (OptStrLen > SMBIOS_STRING_MAX_LENGTH) {
  59     return EFI_UNSUPPORTED;
  60   }
  61
  62   //
  63   // Two zeros following the last string.
  64   //
  65   SmbiosRecord = AllocatePool(sizeof (SMBIOS_TABLE_TYPE12) + OptStrLen + 1 + 1);
  66   ZeroMem(SmbiosRecord, sizeof (SMBIOS_TABLE_TYPE12) + OptStrLen + 1 + 1);
  67
  68   SmbiosRecord->Hdr.Type = EFI_SMBIOS_TYPE_SYSTEM_CONFIGURATION_OPTIONS;
  69   SmbiosRecord->Hdr.Length = sizeof (SMBIOS_TABLE_TYPE12);
  70
  71   //
  72   // Make handle chosen by smbios protocol.add automatically.
  73   //
  74   SmbiosRecord->Hdr.Handle = 0;
  75
  76   SmbiosRecord->StringCount = 1;
  77   OptionalStrStart = (CHAR8*) (SmbiosRecord + 1);
  78   UnicodeStrToAsciiStr(OptionString, OptionalStrStart);
  79
  80   //
  81   // Now we have got the full smbios record, call smbios protocol to add this record.
  82   //
  83   SmbiosHandle = SMBIOS_HANDLE_PI_RESERVED;
  84   Status = Smbios-> Add(
  85                       Smbios,
  86                       NULL,
  87                       &SmbiosHandle,
  88                       (EFI_SMBIOS_TABLE_HEADER *) SmbiosRecord
  89                       );
  90
  91   FreePool(SmbiosRecord);
  92   return Status;
  93 }