EFI_STATUS
EFIAPI
RootBridgeIoCopyMem (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
IN UINT64 DestAddress,
IN UINT64 SrcAddress,
IN UINTN Count
)
/*++
Routine Description:
Copy one region of PCI root bridge memory space to be copied to
another region of PCI root bridge memory space.
Arguments:
This - A pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
Width - Signifies the width of the memory operation.
DestAddress - Destination address of the memory operation.
SrcAddress - Source address of the memory operation.
Count - Number of memory operations to perform.
Returns:
EFI_SUCCESS - The data was copied successfully.
EFI_INVALID_PARAMETER - Invalid parameters found.
EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of
resources.
--*/
{
EFI_STATUS Status;
BOOLEAN Direction;
UINTN Stride;
UINTN Index;
UINT64 Result;
if (Width < 0 || Width > EfiPciWidthUint64) {
return EFI_INVALID_PARAMETER;
}
if (DestAddress == SrcAddress) {
return EFI_SUCCESS;
}
Stride = (UINTN)1 << Width;
Direction = TRUE;
if ((DestAddress > SrcAddress) && (DestAddress < (SrcAddress + Count * Stride))) {
Direction = FALSE;
SrcAddress = SrcAddress + (Count - 1) * Stride;
DestAddress = DestAddress + (Count - 1) * Stride;
}
for (Index = 0; Index < Count; Index++) {
Status = RootBridgeIoMemRead (
This,
Width,
SrcAddress,
1,
&Result
);
if (EFI_ERROR (Status)) {
return Status;
}
Status = RootBridgeIoMemWrite (
This,
Width,
DestAddress,
1,
&Result
);
if (EFI_ERROR (Status)) {
return Status;
}
if (Direction) {
SrcAddress += Stride;
DestAddress += Stride;
} else {
SrcAddress -= Stride;
DestAddress -= Stride;
}
}
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
RootBridgeIoCopyMem (
IN struct _EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
IN UINT64 DestAddress,
IN UINT64 SrcAddress,
IN UINTN Count
)
/*++
Routine Description:
Memory copy
Arguments:
Returns:
--*/
{
EFI_STATUS Status;
BOOLEAN Direction;
UINTN Stride;
UINTN Index;
UINT64 Result;
if (Width < 0 || Width > EfiPciWidthUint64) {
return EFI_INVALID_PARAMETER;
}
if (DestAddress == SrcAddress) {
return EFI_SUCCESS;
}
Stride = (UINTN)(1 << Width);
Direction = TRUE;
if ((DestAddress > SrcAddress) && (DestAddress < (SrcAddress + Count * Stride))) {
Direction = FALSE;
SrcAddress = SrcAddress + (Count-1) * Stride;
DestAddress = DestAddress + (Count-1) * Stride;
}
for (Index = 0;Index < Count;Index++) {
Status = RootBridgeIoMemRead (
This,
Width,
SrcAddress,
1,
&Result
);
if (EFI_ERROR (Status)) {
return Status;
}
Status = RootBridgeIoMemWrite (
This,
Width,
DestAddress,
1,
&Result
);
if (EFI_ERROR (Status)) {
return Status;
}
if (Direction) {
SrcAddress += Stride;
DestAddress += Stride;
} else {
SrcAddress -= Stride;
DestAddress -= Stride;
}
}
return EFI_SUCCESS;
}
