1 files changed, 91 insertions, 0 deletions
diff --git a/UnixPkg/MiscSubClassPlatformDxe/MiscSystemOptionStringFunction.c b/UnixPkg/MiscSubClassPlatformDxe/MiscSystemOptionStringFunction.c
new file mode 100644
index 000000000..8731b7507
--- /dev/null
+++ b/UnixPkg/MiscSubClassPlatformDxe/MiscSystemOptionStringFunction.c
@@ -0,0 +1,91 @@
+/*++
+ 
+Copyright (c) 2009, Intel Corporation. All rights reserved. <BR> 
+This software and associated documentation (if any) is furnished
+under a license and may only be used or copied in accordance
+with the terms of the license. Except as permitted by such
+license, no part of this software or documentation may be
+reproduced, stored in a retrieval system, or transmitted in any
+form or by any means without the express written consent of
+Intel Corporation.
+
+
+Module Name:
+
+  MiscSystemOptionStringFunction.c
+  
+Abstract: 
+
+  BIOS system option string boot time changes.
+  SMBIOS type 12.
+
+--*/
+
+#include "MiscSubClassDriver.h"
+
+
+/**
+  This function makes boot time changes to the contents of the
+  MiscSystemOptionString (Type 12).
+
+  @param  RecordData                 Pointer to copy of RecordData from the Data Table.  
+
+  @retval EFI_SUCCESS                All parameters were valid.
+  @retval EFI_UNSUPPORTED            Unexpected RecordType value.
+  @retval EFI_INVALID_PARAMETER      Invalid parameter was found.
+
+**/
+MISC_SMBIOS_TABLE_FUNCTION(SystemOptionString)
+{
+  CHAR8                             *OptionalStrStart;
+  UINTN                             OptStrLen;
+  EFI_STRING                        OptionString;
+  EFI_STATUS                        Status;
+  STRING_REF                        TokenToGet;
+  EFI_SMBIOS_HANDLE                 SmbiosHandle;
+  SMBIOS_TABLE_TYPE12               *SmbiosRecord;
+
+  //
+  // First check for invalid parameters.
+  //
+  if (RecordData == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  TokenToGet = STRING_TOKEN (STR_MISC_SYSTEM_OPTION_STRING);
+  OptionString = HiiGetPackageString(&gEfiCallerIdGuid, TokenToGet, NULL);
+  OptStrLen = StrLen(OptionString);
+  if (OptStrLen > SMBIOS_STRING_MAX_LENGTH) {
+    return EFI_UNSUPPORTED;
+  }
+ 
+  //
+  // Two zeros following the last string.
+  //
+  SmbiosRecord = AllocatePool(sizeof (SMBIOS_TABLE_TYPE12) + OptStrLen + 1 + 1);
+  ZeroMem(SmbiosRecord, sizeof (SMBIOS_TABLE_TYPE12) + OptStrLen + 1 + 1);
+
+  SmbiosRecord->Hdr.Type = EFI_SMBIOS_TYPE_SYSTEM_CONFIGURATION_OPTIONS;
+  SmbiosRecord->Hdr.Length = sizeof (SMBIOS_TABLE_TYPE12);
+  //
+  // Make handle chosen by smbios protocol.add automatically.
+  //
+  SmbiosRecord->Hdr.Handle = 0;  
+
+  SmbiosRecord->StringCount = 1;
+  OptionalStrStart = (CHAR8*) (SmbiosRecord + 1);
+  UnicodeStrToAsciiStr(OptionString, OptionalStrStart);
+  //
+  // Now we have got the full smbios record, call smbios protocol to add this record.
+  //
+  SmbiosHandle = 0;
+  Status = Smbios-> Add(
+                      Smbios, 
+                      NULL,
+                      &SmbiosHandle, 
+                      (EFI_SMBIOS_TABLE_HEADER *) SmbiosRecord
+                      );
+
+  FreePool(SmbiosRecord);
+  return Status;
+}