/** @file\r
Produces the CPU I/O 2 Protocol.\r
\r
-Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2009 - 2017, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>\r
+\r
This program and the accompanying materials \r
are licensed and made available under the terms and conditions of the BSD License \r
which accompanies this distribution. The full text of the license may be found at \r
//\r
// Check to see if Width is in the valid range\r
//\r
- if (Width < 0 || Width >= EfiCpuIoWidthMaximum) {\r
+ if ((UINT32)Width >= EfiCpuIoWidthMaximum) {\r
return EFI_INVALID_PARAMETER;\r
}\r
\r
//\r
// Check to see if Address is aligned\r
//\r
- if ((Address & (UINT64)(mInStride[Width] - 1)) != 0) {\r
+ if ((Address & ((UINT64)mInStride[Width] - 1)) != 0) {\r
return EFI_UNSUPPORTED;\r
}\r
\r
InStride = mInStride[Width];\r
OutStride = mOutStride[Width];\r
OperationWidth = (EFI_CPU_IO_PROTOCOL_WIDTH) (Width & 0x03);\r
+\r
+ //\r
+ // Fifo operations supported for (mInStride[Width] == 0)\r
+ //\r
+ if (InStride == 0) {\r
+ switch (OperationWidth) {\r
+ case EfiCpuIoWidthUint8:\r
+ IoReadFifo8 ((UINTN)Address, Count, Buffer);\r
+ return EFI_SUCCESS;\r
+ case EfiCpuIoWidthUint16:\r
+ IoReadFifo16 ((UINTN)Address, Count, Buffer);\r
+ return EFI_SUCCESS;\r
+ case EfiCpuIoWidthUint32:\r
+ IoReadFifo32 ((UINTN)Address, Count, Buffer);\r
+ return EFI_SUCCESS;\r
+ default:\r
+ //\r
+ // The CpuIoCheckParameter call above will ensure that this\r
+ // path is not taken.\r
+ //\r
+ ASSERT (FALSE);\r
+ break;\r
+ }\r
+ }\r
+\r
for (Uint8Buffer = Buffer; Count > 0; Address += InStride, Uint8Buffer += OutStride, Count--) {\r
if (OperationWidth == EfiCpuIoWidthUint8) {\r
*Uint8Buffer = IoRead8 ((UINTN)Address);\r
InStride = mInStride[Width];\r
OutStride = mOutStride[Width];\r
OperationWidth = (EFI_CPU_IO_PROTOCOL_WIDTH) (Width & 0x03);\r
+\r
+ //\r
+ // Fifo operations supported for (mInStride[Width] == 0)\r
+ //\r
+ if (InStride == 0) {\r
+ switch (OperationWidth) {\r
+ case EfiCpuIoWidthUint8:\r
+ IoWriteFifo8 ((UINTN)Address, Count, Buffer);\r
+ return EFI_SUCCESS;\r
+ case EfiCpuIoWidthUint16:\r
+ IoWriteFifo16 ((UINTN)Address, Count, Buffer);\r
+ return EFI_SUCCESS;\r
+ case EfiCpuIoWidthUint32:\r
+ IoWriteFifo32 ((UINTN)Address, Count, Buffer);\r
+ return EFI_SUCCESS;\r
+ default:\r
+ //\r
+ // The CpuIoCheckParameter call above will ensure that this\r
+ // path is not taken.\r
+ //\r
+ ASSERT (FALSE);\r
+ break;\r
+ }\r
+ }\r
+\r
for (Uint8Buffer = (UINT8 *)Buffer; Count > 0; Address += InStride, Uint8Buffer += OutStride, Count--) {\r
if (OperationWidth == EfiCpuIoWidthUint8) {\r
IoWrite8 ((UINTN)Address, *Uint8Buffer);\r