Nt32Pkg/MiscSubClassPlatformDxe/MiscSystemOptionStringFunction.c

   1 /*++
   2
   3 Copyright (c) 2009, Intel Corporation. All rights reserved. <BR>
   4 This software and associated documentation (if any) is furnished
   5 under a license and may only be used or copied in accordance
   6 with the terms of the license. Except as permitted by such
   7 license, no part of this software or documentation may be
   8 reproduced, stored in a retrieval system, or transmitted in any
   9 form or by any means without the express written consent of
  10 Intel Corporation.
  11
  12
  13 Module Name:
  14
  15   MiscSystemOptionStringFunction.c
  16
  17 Abstract:
  18
  19   BIOS system option string boot time changes.
  20   SMBIOS type 12.
  21
  22 --*/
  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_STRING);
  56   OptionString = HiiGetPackageString(&gEfiCallerIdGuid, TokenToGet, NULL);
  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   // Make handle chosen by smbios protocol.add automatically.
  72   //
  73   SmbiosRecord->Hdr.Handle = 0;
  74
  75   SmbiosRecord->StringCount = 1;
  76   OptionalStrStart = (CHAR8*) (SmbiosRecord + 1);
  77   UnicodeStrToAsciiStr(OptionString, OptionalStrStart);
  78   //
  79   // Now we have got the full smbios record, call smbios protocol to add this record.
  80   //
  81   SmbiosHandle = 0;
  82   Status = Smbios-> Add(
  83                       Smbios,
  84                       NULL,
  85                       &SmbiosHandle,
  86                       (EFI_SMBIOS_TABLE_HEADER *) SmbiosRecord
  87                       );
  88
  89   FreePool(SmbiosRecord);
  90   return Status;
  91 }