MdeModulePkg/Universal/FirmwareVolume/FaultTolerantWriteDxe/Ipf/IpfFtwMisc.c

   1 /** @file
   2
   3   Ipf platform related code to support FtwLite..
   4
   5 Copyright (c) 2006 - 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
  17 #include <FtwLite.h>
  18
  19 //
  20 // MACROs for boot block update
  21 //
  22 #define BOOT_BLOCK_BASE
  23
  24 STATIC
  25 EFI_STATUS
  26 GetSwapState (
  27   IN EFI_FTW_LITE_DEVICE    *FtwLiteDevice,
  28   OUT BOOLEAN               *SwapState
  29   )
  30 /*++
  31
  32 Routine Description:
  33
  34   Get swap state
  35
  36 Arguments:
  37
  38   FtwLiteDevice - Calling context
  39   SwapState     - Swap state
  40
  41 Returns:
  42
  43   EFI_SUCCESS - State successfully got
  44
  45 --*/
  46 {
  47   return EFI_SUCCESS;
  48 }
  49
  50 STATIC
  51 EFI_STATUS
  52 SetSwapState (
  53   IN EFI_FTW_LITE_DEVICE    *FtwLiteDevice,
  54   IN  BOOLEAN               TopSwap
  55   )
  56 /*++
  57
  58 Routine Description:
  59     Set swap state.
  60
  61 Arguments:
  62     FtwLiteDevice  - Indicates a pointer to the calling context.
  63     TopSwap        - New swap state
  64
  65 Returns:
  66     EFI_SUCCESS   - The function completed successfully
  67
  68 Note:
  69     the Top-Swap bit (bit 13, D31: F0, Offset D4h). Note that
  70     software will not be able to clear the Top-Swap bit until the system is
  71     rebooted without GNT[A]# being pulled down.
  72
  73 --*/
  74 {
  75   return EFI_SUCCESS;
  76 }
  77
  78 BOOLEAN
  79 IsBootBlock (
  80   EFI_FTW_LITE_DEVICE                 *FtwLiteDevice,
  81   EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL  *FvBlock,
  82   EFI_LBA                             Lba
  83   )
  84 /*++
  85
  86 Routine Description:
  87
  88   Check whether the block is a boot block.
  89
  90 Arguments:
  91
  92   FtwLiteDevice - Calling context
  93   FvBlock       - Fvb protocol instance
  94   Lba           - Lba value
  95
  96 Returns:
  97
  98   Is a boot block or not
  99
 100 --*/
 101 {
 102   //
 103   // IPF doesn't support safe bootblock update
 104   // so treat bootblock as normal block
 105   //
 106   return FALSE;
 107 }
 108
 109 EFI_STATUS
 110 FlushSpareBlockToBootBlock (
 111   EFI_FTW_LITE_DEVICE      *FtwLiteDevice
 112   )
 113 /*++
 114
 115 Routine Description:
 116     Copy the content of spare block to a boot block. Size is FTW_BLOCK_SIZE.
 117     Spare block is accessed by FTW backup FVB protocol interface. LBA is
 118     FtwLiteDevice->FtwSpareLba.
 119     Boot block is accessed by BootFvb protocol interface. LBA is 0.
 120
 121 Arguments:
 122     FtwLiteDevice  - The private data of FTW_LITE driver
 123
 124 Returns:
 125     EFI_SUCCESS              - Spare block content is copied to boot block
 126     EFI_INVALID_PARAMETER    - Input parameter error
 127     EFI_OUT_OF_RESOURCES     - Allocate memory error
 128     EFI_ABORTED              - The function could not complete successfully
 129
 130 Notes:
 131
 132 --*/
 133 {
 134   return EFI_SUCCESS;
 135 }