IntelFrameworkModulePkg/Universal/VariablePei/VariableWorker.c

   1 /*++
   2
   3 Copyright (c) 2007, Intel Corporation
   4 All rights reserved. This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13
  14   VariableWorker.c
  15
  16 Abstract:
  17
  18   Framework PEIM to provide the Variable functionality
  19
  20 --*/
  21
  22 #include <Variable.h>
  23
  24 /**
  25   Get one variable by the index count.
  26
  27   @param  IndexTable  The pointer to variable index table.
  28   @param  Count       The index count of variable in index table.
  29
  30   @return The pointer to variable header indexed by count.
  31
  32 **/
  33 VARIABLE_HEADER *
  34 GetVariableByIndex (
  35   IN VARIABLE_INDEX_TABLE        *IndexTable,
  36   IN UINT32                      Count
  37   )
  38 {
  39   return (VARIABLE_HEADER *) (UINTN) (IndexTable->Index[Count] + ((UINTN) IndexTable->StartPtr & 0xFFFF0000));
  40 }
  41
  42 /**
  43   Record Variable in VariableIndex HOB.
  44
  45   Record Variable in VariableIndex HOB and update the length of variable index table.
  46
  47   @param  IndexTable  The pointer to variable index table.
  48   @param  Variable    The pointer to the variable that will be recorded.
  49
  50   @retval VOID
  51
  52 **/
  53 VOID
  54 VariableIndexTableUpdate (
  55   IN OUT  VARIABLE_INDEX_TABLE   *IndexTable,
  56   IN      VARIABLE_HEADER        *Variable
  57   )
  58 {
  59   IndexTable->Index[IndexTable->Length++] = (UINT16) (UINTN) Variable;
  60
  61   return;
  62 }
  63