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roll back the changes as NT32 could not use PciLib

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5517 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
eric_tian
2008-07-18 08:03:26 +00:00
parent 9b937a73b0
commit ca4eb92e3b
2 changed files with 75 additions and 8 deletions
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71
MdeModulePkg/Universal/FirmwareVolume/FaultTolerantWriteDxe/Ia32/Ia32FtwMisc.c
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@@ -35,7 +35,51 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
/**
Get swap state.
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
)
{
EFI_STATUS Status;
UINT32 Value;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;
Value = 0;
Status = gBS->LocateProtocol (&gEfiPciRootBridgeIoProtocolGuid, NULL, (VOID **) &PciRootBridgeIo);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "FtwLite: Locate PCI root bridge io protocol - %r", Status));
return 0;
}
Status = PciRootBridgeIo->Pci.Read (
PciRootBridgeIo,
EfiPciWidthUint32,
EFI_PCI_ADDRESS (
LPC_BUS_NUMBER,
LPC_DEVICE_NUMBER,
LPC_IF,
Offset
),
1,
&Value
);
ASSERT_EFI_ERROR (Status);
return Value;
}
/**
Get swap state
This is a internal function.
@@ -51,13 +95,10 @@ GetSwapState (
OUT BOOLEAN *SwapState
)
{
UINT32 Value;
Value = PciRead32(EFI_PCI_ADDRESS (LPC_BUS_NUMBER, LPC_DEVICE_NUMBER, LPC_IF, GEN_STATUS))
//
// Top swap status is 13 bit
//
*SwapState = (BOOLEAN) ((Value & TOP_SWAP_BIT) != 0);
*SwapState = (BOOLEAN) ((ReadPciRegister (GEN_STATUS) & TOP_SWAP_BIT) != 0);
return EFI_SUCCESS;
}
@@ -90,7 +131,7 @@ SetSwapState (
//
// Top-Swap bit (bit 13, D31: F0, Offset D4h)
//
GenStatus = PciRead32(EFI_PCI_ADDRESS (LPC_BUS_NUMBER, LPC_DEVICE_NUMBER, LPC_IF, GEN_STATUS));
GenStatus = ReadPciRegister (GEN_STATUS);
//
// Set 13 bit, according to input NewSwapState
@@ -101,10 +142,26 @@ SetSwapState (
GenStatus &= ~TOP_SWAP_BIT;
}
Status = gBS->LocateProtocol (&gEfiPciRootBridgeIoProtocolGuid, NULL, (VOID **) &PciRootBridgeIo);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "FtwLite: Locate PCI root bridge io protocol - %r", Status));
return Status;
}
//
// Write back the GenStatus register
//
PciWrite32(EFI_PCI_ADDRESS (LPC_BUS_NUMBER, LPC_DEVICE_NUMBER, LPC_IF, GEN_STATUS), GenStatus);
Status = PciRootBridgeIo->Pci.Write (
PciRootBridgeIo,
EfiPciWidthUint32,
EFI_PCI_ADDRESS (
LPC_BUS_NUMBER,
LPC_DEVICE_NUMBER,
LPC_IF,
GEN_STATUS
),
1,
&GenStatus
);
DEBUG_CODE_BEGIN ();
if (TopSwap) {