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

   1 /*++
   2
   3 Copyright (c) 2006, 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   IpfFtwMisc.c
  15
  16 Abstract:
  17
  18   Ipf platform related code to support FtwLite..
  19
  20 Revision History
  21
  22 --*/
  23
  24
  25 #include <FtwLite.h>
  26
  27 //
  28 // MACROs for boot block update
  29 //
  30 #define BOOT_BLOCK_BASE
  31
  32 STATIC
  33 EFI_STATUS
  34 GetSwapState (
  35   IN EFI_FTW_LITE_DEVICE    *FtwLiteDevice,
  36   OUT BOOLEAN               *SwapState
  37   )
  38 /*++
  39
  40 Routine Description:
  41
  42   Get swap state
  43
  44 Arguments:
  45
  46   FtwLiteDevice - Calling context
  47   SwapState     - Swap state
  48
  49 Returns:
  50
  51   EFI_SUCCESS - State successfully got
  52
  53 --*/
  54 {
  55   return EFI_SUCCESS;
  56 }
  57
  58 STATIC
  59 EFI_STATUS
  60 SetSwapState (
  61   IN EFI_FTW_LITE_DEVICE    *FtwLiteDevice,
  62   IN  BOOLEAN               TopSwap
  63   )
  64 /*++
  65
  66 Routine Description:
  67     Set swap state.
  68
  69 Arguments:
  70     FtwLiteDevice  - Indicates a pointer to the calling context.
  71     TopSwap        - New swap state
  72
  73 Returns:
  74     EFI_SUCCESS   - The function completed successfully
  75
  76 Note:
  77     the Top-Swap bit (bit 13, D31: F0, Offset D4h). Note that
  78     software will not be able to clear the Top-Swap bit until the system is
  79     rebooted without GNT[A]# being pulled down.
  80
  81 --*/
  82 {
  83   return EFI_SUCCESS;
  84 }
  85
  86 BOOLEAN
  87 IsBootBlock (
  88   EFI_FTW_LITE_DEVICE                 *FtwLiteDevice,
  89   EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL  *FvBlock,
  90   EFI_LBA                             Lba
  91   )
  92 /*++
  93
  94 Routine Description:
  95
  96   Check whether the block is a boot block.
  97
  98 Arguments:
  99
 100   FtwLiteDevice - Calling context
 101   FvBlock       - Fvb protocol instance
 102   Lba           - Lba value
 103
 104 Returns:
 105
 106   Is a boot block or not
 107
 108 --*/
 109 {
 110   //
 111   // IPF doesn't support safe bootblock update
 112   // so treat bootblock as normal block
 113   //
 114   return FALSE;
 115 }
 116
 117 EFI_STATUS
 118 FlushSpareBlockToBootBlock (
 119   EFI_FTW_LITE_DEVICE      *FtwLiteDevice
 120   )
 121 /*++
 122
 123 Routine Description:
 124     Copy the content of spare block to a boot block. Size is FTW_BLOCK_SIZE.
 125     Spare block is accessed by FTW backup FVB protocol interface. LBA is
 126     FtwLiteDevice->FtwSpareLba.
 127     Boot block is accessed by BootFvb protocol interface. LBA is 0.
 128
 129 Arguments:
 130     FtwLiteDevice  - The private data of FTW_LITE driver
 131
 132 Returns:
 133     EFI_SUCCESS              - Spare block content is copied to boot block
 134     EFI_INVALID_PARAMETER    - Input parameter error
 135     EFI_OUT_OF_RESOURCES     - Allocate memory error
 136     EFI_ABORTED              - The function could not complete successfully
 137
 138 Notes:
 139
 140 --*/
 141 {
 142   return EFI_SUCCESS;
 143 }