MdeModulePkg/Universal/Variable/Pei/VariableWorker.c

   1 /** @file
   2
   3   Variable worker functions specific for IA32, X64 and EBC.
   4
   5 Copyright (c) 2007 - 2008, Intel Corporation
   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   Get one variable by the index count.
  20
  21   @param  IndexTable  The pointer to variable index table.
  22   @param  Count       The index count of variable in index table.
  23
  24   @return The pointer to variable header indexed by count.
  25
  26 **/
  27 VARIABLE_HEADER *
  28 GetVariableByIndex (
  29   IN VARIABLE_INDEX_TABLE        *IndexTable,
  30   IN UINT32                      Count
  31   )
  32 {
  33   return (VARIABLE_HEADER *) (UINTN) (IndexTable->Index[Count] + ((UINTN) IndexTable->StartPtr & 0xFFFF0000));
  34 }
  35
  36 /**
  37   Record Variable in VariableIndex HOB.
  38
  39   Record Variable in VariableIndex HOB and update the length of variable index table.
  40
  41   @param  IndexTable  The pointer to variable index table.
  42   @param  Variable    The pointer to the variable that will be recorded.
  43
  44 **/
  45 VOID
  46 VariableIndexTableUpdate (
  47   IN OUT  VARIABLE_INDEX_TABLE   *IndexTable,
  48   IN      VARIABLE_HEADER        *Variable
  49   )
  50 {
  51   IndexTable->Index[IndexTable->Length++] = (UINT16) (UINTN) Variable;
  52
  53   return;
  54 }
  55