STATIC
EFI_STATUS
CpuIoMemRW (
IN EFI_CPU_IO_PROTOCOL_WIDTH Width,
IN UINTN Count,
IN BOOLEAN DestinationStrideFlag,
OUT PTR Destination,
IN BOOLEAN SourceStrideFlag,
IN PTR Source
)
/*++
Routine Description:
Private service to perform memory mapped I/O read/write
Arguments:
Width - Width of the memory mapped I/O operation
Count - Count of the number of accesses to perform
DestinationStrideFlag - Boolean flag indicates if the destination is to be incremented
Destination - Destination of the memory mapped I/O operation
SourceStrideFlag - Boolean flag indicates if the source is to be incremented
Source - Source of the memory mapped I/O operation
Returns:
EFI_SUCCESS - Successful operation
EFI_INVALID_PARAMETER - Width is invalid
--*/
{
UINTN Stride;
UINTN DestinationStride;
UINTN SourceStride;
Width = Width & 0x03;
Stride = (UINTN)1 << Width;
DestinationStride = DestinationStrideFlag ? Stride : 0;
SourceStride = SourceStrideFlag ? Stride : 0;
//
// Loop for each iteration and move the data
//
switch (Width) {
case EfiCpuIoWidthUint8:
for (; Count > 0; Count--, Destination.buf += DestinationStride, Source.buf += SourceStride) {
MEMORY_FENCE ();
*Destination.ui8 = *Source.ui8;
MEMORY_FENCE ();
}
break;
case EfiCpuIoWidthUint16:
for (; Count > 0; Count--, Destination.buf += DestinationStride, Source.buf += SourceStride) {
MEMORY_FENCE ();
*Destination.ui16 = *Source.ui16;
MEMORY_FENCE ();
}
break;
case EfiCpuIoWidthUint32:
for (; Count > 0; Count--, Destination.buf += DestinationStride, Source.buf += SourceStride) {
MEMORY_FENCE ();
*Destination.ui32 = *Source.ui32;
MEMORY_FENCE ();
}
break;
case EfiCpuIoWidthUint64:
for (; Count > 0; Count--, Destination.buf += DestinationStride, Source.buf += SourceStride) {
MEMORY_FENCE ();
*Destination.ui64 = *Source.ui64;
MEMORY_FENCE ();
}
break;
default:
return EFI_INVALID_PARAMETER;
}
return EFI_SUCCESS;
}
EFI_STATUS
PcatRootBridgeIoIoRead (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
IN UINT64 UserAddress,
IN UINTN Count,
IN OUT VOID *UserBuffer
)
{
PCAT_PCI_ROOT_BRIDGE_INSTANCE *PrivateData;
UINTN InStride;
UINTN OutStride;
UINTN AlignMask;
UINTN Address;
PTR Buffer;
UINT16 Data16;
UINT32 Data32;
if ( UserBuffer == NULL ) {
return EFI_INVALID_PARAMETER;
}
PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS(This);
Address = (UINTN) UserAddress;
Buffer.buf = (UINT8 *)UserBuffer;
if ( Address < PrivateData->IoBase || Address > PrivateData->IoLimit ) {
return EFI_INVALID_PARAMETER;
}
if ((UINT32)Width >= EfiPciWidthMaximum) {
return EFI_INVALID_PARAMETER;
}
if ((Width & 0x03) == EfiPciWidthUint64) {
return EFI_INVALID_PARAMETER;
}
AlignMask = (1 << (Width & 0x03)) - 1;
if ( Address & AlignMask ) {
return EFI_INVALID_PARAMETER;
}
InStride = 1 << (Width & 0x03);
OutStride = InStride;
if (Width >=EfiPciWidthFifoUint8 && Width <= EfiPciWidthFifoUint64) {
InStride = 0;
}
if (Width >=EfiPciWidthFillUint8 && Width <= EfiPciWidthFillUint64) {
OutStride = 0;
}
Width = Width & 0x03;
Address += PrivateData->PhysicalIoBase;
//
// Loop for each iteration and move the data
//
switch (Width) {
case EfiPciWidthUint8:
for (; Count > 0; Count--, Buffer.buf += OutStride, Address += InStride) {
MEMORY_FENCE();
*Buffer.ui8 = PORT_TO_MEM8(Address);
MEMORY_FENCE();
}
break;
case EfiPciWidthUint16:
for (; Count > 0; Count--, Buffer.buf += OutStride, Address += InStride) {
MEMORY_FENCE();
if (Buffer.ui & 0x1) {
Data16 = PORT_TO_MEM16(Address);
*Buffer.ui8 = (UINT8)(Data16 & 0xff);
*(Buffer.ui8+1) = (UINT8)((Data16 >> 8) & 0xff);
} else {
*Buffer.ui16 = PORT_TO_MEM16(Address);
}
MEMORY_FENCE();
}
EFI_STATUS
CpuIoMemRW (
IN EFI_CPU_IO_PROTOCOL_WIDTH Width,
IN UINTN Count,
IN BOOLEAN InStrideFlag,
IN PTR In,
IN BOOLEAN OutStrideFlag,
OUT PTR Out
)
/*++
Routine Description:
Private service to provide the memory read/write
Arguments:
Width of the Memory Access
Count of the number of accesses to perform
Returns:
Status
EFI_SUCCESS - Successful transaction
EFI_INVALID_PARAMETER - Unsupported width and address combination
--*/
// TODO: InStrideFlag - add argument and description to function comment
// TODO: In - add argument and description to function comment
// TODO: OutStrideFlag - add argument and description to function comment
// TODO: Out - add argument and description to function comment
{
UINTN Stride;
UINTN InStride;
UINTN OutStride;
LONG ReturnedLength;
Width = Width & 0x03;
Stride = 1 << Width;
InStride = InStrideFlag ? Stride : 0;
OutStride = OutStrideFlag ? Stride : 0;
//
// Loop for each iteration and move the data
//
switch (Width) {
case EfiCpuIoWidthUint8:
for (; Count > 0; Count--, In.buf += InStride, Out.buf += OutStride) {
MEMORY_FENCE ();
gWinNtThunk->DeviceIoControl (
gDeviceHandle, // Handle to device
IOCTL_MEM_COPY, // IO Control code to use
Out.ui8, // Out Buffer to communicate to driver
Count, // Length of buffer in bytes.
In.ui8, // In Buffer to fill in by kernel driver.
Count, // Length of buffer in bytes.
&ReturnedLength, // Bytes placed in In buffer.
NULL // NULL means wait till op. completes.
);
MEMORY_FENCE ();
}
break;
case EfiCpuIoWidthUint16:
for (; Count > 0; Count--, In.buf += InStride, Out.buf += OutStride) {
MEMORY_FENCE ();
gWinNtThunk->DeviceIoControl (
gDeviceHandle, // Handle to device
IOCTL_MEM_COPY, // IO Control code to use
Out.ui16, // Out Buffer to communicate to driver
Count * 2, // Length of buffer in bytes.
In.ui16, // In Buffer to fill in by kernel driver.
Count * 2, // Length of buffer in bytes.
&ReturnedLength, // Bytes placed in In buffer.
NULL // NULL means wait till op. completes.
);
MEMORY_FENCE ();
}
break;
case EfiCpuIoWidthUint32:
for (; Count > 0; Count--, In.buf += InStride, Out.buf += OutStride) {
MEMORY_FENCE ();
gWinNtThunk->DeviceIoControl (
gDeviceHandle, // Handle to device
IOCTL_MEM_COPY, // IO Control code to use
Out.ui32, // Out Buffer to communicate to driver
Count * 4, // Length of buffer in bytes.
In.ui32, // In Buffer to fill in by kernel driver.
Count * 4, // Length of buffer in bytes.
&ReturnedLength, // Bytes placed in In buffer.
NULL // NULL means wait till op. completes.
);
MEMORY_FENCE ();
}
break;
default:
return EFI_INVALID_PARAMETER;
}
return EFI_SUCCESS;
}