From ff5d3cc25f68eaa8ad058ffdf63db79ae67e841b Mon Sep 17 00:00:00 2001
From: Leo Duran <leo.duran@amd.com>
Date: Sat, 14 Jan 2017 04:09:53 +0800
Subject: [PATCH 1/1] UefiCpuPkg: Modify CpuIoPei to support new IoLib library

The IO_PPI supports Fifo types by invoking the Fifo routines in the
new BaseIoLibIntrinsic (IoLib class) library.

Cc: Jeff Fan <jeff.fan@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Leo Duran  <leo.duran@amd.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>
---
 UefiCpuPkg/CpuIoPei/CpuIoPei.c | 52 ++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/UefiCpuPkg/CpuIoPei/CpuIoPei.c b/UefiCpuPkg/CpuIoPei/CpuIoPei.c
index 3c5c8a74b3..b6d538b166 100644
--- a/UefiCpuPkg/CpuIoPei/CpuIoPei.c
+++ b/UefiCpuPkg/CpuIoPei/CpuIoPei.c
@@ -2,6 +2,8 @@
   Produces the CPU I/O PPI.
 
 Copyright (c) 2009 - 2012, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
+
 This program and the accompanying materials                          
 are licensed and made available under the terms and conditions of the BSD License         
 which accompanies this distribution.  The full text of the license may be found at        
@@ -375,6 +377,31 @@ CpuIoServiceRead (
   InStride = mInStride[Width];
   OutStride = mOutStride[Width];
   OperationWidth = (EFI_PEI_CPU_IO_PPI_WIDTH) (Width & 0x03);
+
+  //
+  // Fifo operations supported for (mInStride[Width] == 0)
+  //
+  if (InStride == 0) {
+    switch (OperationWidth) {
+    case EfiPeiCpuIoWidthUint8:
+      IoReadFifo8 ((UINTN)Address, Count, Buffer);
+      return EFI_SUCCESS;
+    case EfiPeiCpuIoWidthUint16:
+      IoReadFifo16 ((UINTN)Address, Count, Buffer);
+      return EFI_SUCCESS;
+    case EfiPeiCpuIoWidthUint32:
+      IoReadFifo32 ((UINTN)Address, Count, Buffer);
+      return EFI_SUCCESS;
+    default:
+      //
+      // The CpuIoCheckParameter call above will ensure that this
+      // path is not taken.
+      //
+      ASSERT (FALSE);
+      break;
+    }
+  }
+
   Aligned = (BOOLEAN)(((UINTN)Buffer & (mInStride[OperationWidth] - 1)) == 0x00);
   for (Uint8Buffer = Buffer; Count > 0; Address += InStride, Uint8Buffer += OutStride, Count--) {
     if (OperationWidth == EfiPeiCpuIoWidthUint8) {
@@ -447,6 +474,31 @@ CpuIoServiceWrite (
   InStride = mInStride[Width];
   OutStride = mOutStride[Width];
   OperationWidth = (EFI_PEI_CPU_IO_PPI_WIDTH) (Width & 0x03);
+
+  //
+  // Fifo operations supported for (mInStride[Width] == 0)
+  //
+  if (InStride == 0) {
+    switch (OperationWidth) {
+    case EfiPeiCpuIoWidthUint8:
+      IoWriteFifo8 ((UINTN)Address, Count, Buffer);
+      return EFI_SUCCESS;
+    case EfiPeiCpuIoWidthUint16:
+      IoWriteFifo16 ((UINTN)Address, Count, Buffer);
+      return EFI_SUCCESS;
+    case EfiPeiCpuIoWidthUint32:
+      IoWriteFifo32 ((UINTN)Address, Count, Buffer);
+      return EFI_SUCCESS;
+    default:
+      //
+      // The CpuIoCheckParameter call above will ensure that this
+      // path is not taken.
+      //
+      ASSERT (FALSE);
+      break;
+    }
+  }
+
   Aligned = (BOOLEAN)(((UINTN)Buffer & (mInStride[OperationWidth] - 1)) == 0x00);
   for (Uint8Buffer = (UINT8 *)Buffer; Count > 0; Address += InStride, Uint8Buffer += OutStride, Count--) {
     if (OperationWidth == EfiPeiCpuIoWidthUint8) {
-- 
2.39.2