Update Comments

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@7110 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Universal/FirmwareVolume/FaultTolerantWriteDxe/FtwLite.c

@@ -17,7 +17,7 @@
   
   The write record has three states to specify the different phase of write operation.
   1) WRITE_ALLOCATED is that the record is allocated in write space.
-     The write record structure records the information of write operation.
+     The information of write operation is stored in write record structure.
   2) SPARE_COMPLETED is that the data from write buffer is writed into the spare block as the backup.
   3) WRITE_COMPLETED is that the data is copied from the spare block to the target block.
 
@@ -423,7 +423,6 @@ FtwWriteRecord (
 
   //
   // IF target block is working block, THEN Flush Spare Block To Working Block;
-  // ELSE IF target block is boot block, THEN Flush Spare Block To boot Block;
   // ELSE flush spare block to normal target block.ENDIF
   //
   if (IsInWorkingBlock (FtwLiteDevice, Fvb, Record->Lba)) {
@@ -444,7 +443,7 @@ FtwWriteRecord (
     Status = FlushSpareBlockToWorkingBlock (FtwLiteDevice);
   } else {
     //
-    // Update blocks other than working block or boot block
+    // Update blocks other than working block
     //
     Status = FlushSpareBlockToTargetBlock (FtwLiteDevice, Fvb, Record->Lba);
   }

MdeModulePkg/Universal/FirmwareVolume/FaultTolerantWriteDxe/FtwLite.h

@@ -68,16 +68,6 @@ typedef struct {
 
 #define FTW_LITE_DEVICE_SIGNATURE SIGNATURE_32 ('F', 'T', 'W', 'L')
 
-//
-// MACRO for Block size.
-// Flash Erasing will do in block granularity.
-//
-#ifdef FV_BLOCK_SIZE
-#define FTW_BLOCK_SIZE  FV_BLOCK_SIZE
-#else
-#define FV_BLOCK_SIZE   0x10000
-#define FTW_BLOCK_SIZE  FV_BLOCK_SIZE
-#endif
 //
 // MACRO for FTW WORK SPACE Base & Size
 //
@@ -249,7 +239,7 @@ FtwWriteRecord (
   );
 
 /**
-  To Erase one block. The size is FTW_BLOCK_SIZE
+  To erase the block with the spare block size.
 
 
   @param FtwLiteDevice   Calling context
@@ -348,26 +338,6 @@ IsInWorkingBlock (
   EFI_LBA                             Lba
   );
 
-/**
-
-  Check whether the block is a boot block.
-
-
-  @param FtwLiteDevice   Calling context
-  @param FvBlock         Fvb protocol instance
-  @param Lba             Lba value
-
-  @retval FALSE           This is a boot block.
-  @retval TRUE            This is not a boot block.
-
-**/
-BOOLEAN
-IsBootBlock (
-  EFI_FTW_LITE_DEVICE                 *FtwLiteDevice,
-  EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL  *FvBlock,
-  EFI_LBA                             Lba
-  );
-
 /**
   Copy the content of spare block to a target block. Size is FTW_BLOCK_SIZE.
   Spare block is accessed by FTW backup FVB protocol interface. LBA is
@@ -416,27 +386,6 @@ FlushSpareBlockToWorkingBlock (
   EFI_FTW_LITE_DEVICE                 *FtwLiteDevice
   );
 
-/**
-  Copy the content of spare block to a boot block. Size is FTW_BLOCK_SIZE.
-  Spare block is accessed by FTW backup FVB protocol interface. LBA is
-  FtwLiteDevice->FtwSpareLba.
-  Boot block is accessed by BootFvb protocol interface. LBA is 0.
-
-
-  @param FtwLiteDevice   The private data of FTW_LITE driver
-
-  @retval  EFI_SUCCESS               Spare block content is copied to boot block
-  @retval  EFI_INVALID_PARAMETER     Input parameter error
-  @retval  EFI_OUT_OF_RESOURCES      Allocate memory error
-  @retval  EFI_ABORTED               The function could not complete successfully
-                                     Notes:
-
-**/
-EFI_STATUS
-FlushSpareBlockToBootBlock (
-  EFI_FTW_LITE_DEVICE                 *FtwLiteDevice
-  );
-
 /**
   Update a bit of state on a block device. The location of the bit is
   calculated by the (Lba, Offset, bit). Here bit is determined by the