MdeModulePkg/Universal/Variable/Pei/Ipf/VariableWorker.c

   1 /** @file
   2
   3   Variable worker functions specific for IPF arch.
   4
   5   Copyright (c) 2006 - 2008, Intel Corporation<BR>
   6   All rights reserved. This program and the accompanying materials
   7   are licensed and made available under the terms and conditions of the BSD License
   8   which accompanies this distribution.  The full text of the license may be found at
   9   http://opensource.org/licenses/bsd-license.php
  10
  11   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14 **/
  15
  16 #include "Variable.h"
  17
  18
  19 /**
  20   Get one variable by the index count.
  21
  22   @param  IndexTable  The pointer to variable index table.
  23   @param  Count       The index count of variable in index table.
  24
  25   @return The pointer to variable header indexed by count.
  26
  27 **/
  28 VARIABLE_HEADER *
  29 GetVariableByIndex (
  30   IN VARIABLE_INDEX_TABLE        *IndexTable,
  31   IN UINT32                      Count
  32   )
  33 {
  34   return (VARIABLE_HEADER *) (UINTN) ((((UINT32)IndexTable->Index[Count]) << 2) + ((UINT32)(UINTN)IndexTable->StartPtr & 0xFFFC0000) );
  35 }
  36
  37 /**
  38   Record Variable in VariableIndex HOB.
  39
  40   Record Variable in VariableIndex HOB and update the length of variable index table.
  41
  42   @param  IndexTable  The pointer to variable index table.
  43   @param  Variable    The pointer to the variable that will be recorded.
  44
  45 **/
  46 VOID
  47 VariableIndexTableUpdate (
  48   IN OUT  VARIABLE_INDEX_TABLE   *IndexTable,
  49   IN      VARIABLE_HEADER        *Variable
  50   )
  51 {
  52   IndexTable->Index[IndexTable->Length++] = (UINT16) (((UINT32)(UINTN) Variable) >> 2);
  53
  54   return;
  55 }
  56