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Clean up FaultTolerantWriteDxe for Doxygen comments requirement.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5463 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
qwang12
2008-07-14 08:19:45 +00:00
parent b414ea4b21
commit 6aab82140b
7 changed files with 787 additions and 971 deletions
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186
MdeModulePkg/Universal/FirmwareVolume/FaultTolerantWriteDxe/Ia32/Ia32FtwMisc.c
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@@ -33,26 +33,21 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#define GEN_STATUS 0xD4
#define TOP_SWAP_BIT (1 << 13)
STATIC
/**
Read PCI register value.
This is a internal function.
@param Offset Offset of the register
@return The pci register value.
**/
UINT32
ReadPciRegister (
IN UINT32 Offset
)
/*++
Routine Description:
Read PCI register value.
Arguments:
Offset - Offset of the register
Returns:
The value.
--*/
{
EFI_STATUS Status;
UINT32 Value;
@@ -82,28 +77,23 @@ Returns:
return Value;
}
STATIC
/**
Get swap state
This is a internal function.
@param FtwLiteDevice Calling context
@param SwapState Swap state
@retval EFI_SUCCESS State successfully got
**/
EFI_STATUS
GetSwapState (
IN EFI_FTW_LITE_DEVICE *FtwLiteDevice,
OUT BOOLEAN *SwapState
)
/*++
Routine Description:
Get swap state
Arguments:
FtwLiteDevice - Calling context
SwapState - Swap state
Returns:
EFI_SUCCESS - State successfully got
--*/
{
//
// Top swap status is 13 bit
@@ -113,30 +103,26 @@ Returns:
return EFI_SUCCESS;
}
STATIC
/**
Set swap state.
This is a internal function.
@param FtwLiteDevice Indicates a pointer to the calling context.
@param TopSwap New swap state
@retval EFI_SUCCESS The function completed successfully
Note:
the Top-Swap bit (bit 13, D31: F0, Offset D4h). Note that
software will not be able to clear the Top-Swap bit until the system is
rebooted without GNT[A]# being pulled down.
**/
EFI_STATUS
SetSwapState (
IN EFI_FTW_LITE_DEVICE *FtwLiteDevice,
IN BOOLEAN TopSwap
)
/*++
Routine Description:
Set swap state.
Arguments:
FtwLiteDevice - Indicates a pointer to the calling context.
TopSwap - New swap state
Returns:
EFI_SUCCESS - The function completed successfully
Note:
the Top-Swap bit (bit 13, D31: F0, Offset D4h). Note that
software will not be able to clear the Top-Swap bit until the system is
rebooted without GNT[A]# being pulled down.
--*/
{
UINT32 GenStatus;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;
@@ -188,29 +174,25 @@ Note:
return EFI_SUCCESS;
}
/**
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
)
/*++
Routine Description:
Check whether the block is a boot block.
Arguments:
FtwLiteDevice - Calling context
FvBlock - Fvb protocol instance
Lba - Lba value
Returns:
Is a boot block or not
--*/
{
EFI_STATUS Status;
EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *BootFvb;
@@ -225,46 +207,40 @@ Returns:
return (BOOLEAN) (FvBlock == BootFvb);
}
/**
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:
FTW will do extra work on boot block update.
FTW should depend on a protocol of EFI_ADDRESS_RANGE_SWAP_PROTOCOL,
which is produced by a chipset driver.
FTW updating boot block steps:
1. Erase top swap block (0xFFFE-0xFFFEFFFF) and write data to it ready
2. Read data from top swap block to memory buffer
3. SetSwapState(EFI_SWAPPED)
4. Erasing boot block (0xFFFF-0xFFFFFFFF)
5. Programming boot block until the boot block is ok.
6. SetSwapState(UNSWAPPED)
Notes:
1. Since the SwapState bit is saved in CMOS, FTW can restore and continue
even in the scenario of power failure.
2. FTW shall not allow to update boot block when battery state is error.
**/
EFI_STATUS
FlushSpareBlockToBootBlock (
EFI_FTW_LITE_DEVICE *FtwLiteDevice
)
/*++
Routine Description:
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.
Arguments:
FtwLiteDevice - The private data of FTW_LITE driver
Returns:
EFI_SUCCESS - Spare block content is copied to boot block
EFI_INVALID_PARAMETER - Input parameter error
EFI_OUT_OF_RESOURCES - Allocate memory error
EFI_ABORTED - The function could not complete successfully
Notes:
FTW will do extra work on boot block update.
FTW should depend on a protocol of EFI_ADDRESS_RANGE_SWAP_PROTOCOL,
which is produced by a chipset driver.
FTW updating boot block steps:
1. Erase top swap block (0xFFFE-0xFFFEFFFF) and write data to it ready
2. Read data from top swap block to memory buffer
3. SetSwapState(EFI_SWAPPED)
4. Erasing boot block (0xFFFF-0xFFFFFFFF)
5. Programming boot block until the boot block is ok.
6. SetSwapState(UNSWAPPED)
Notes:
1. Since the SwapState bit is saved in CMOS, FTW can restore and continue
even in the scenario of power failure.
2. FTW shall not allow to update boot block when battery state is error.
--*/
{
EFI_STATUS Status;
UINTN Length;