1 files changed, 56 insertions, 0 deletions
diff --git a/CorebootPayloadPkg/Library/PlatformHookLib/PlatformHookLib.c b/CorebootPayloadPkg/Library/PlatformHookLib/PlatformHookLib.c
new file mode 100644
index 0000000000..10fd332fe5
--- /dev/null
+++ b/CorebootPayloadPkg/Library/PlatformHookLib/PlatformHookLib.c
@@ -0,0 +1,56 @@
+/** @file
+  Platform Hook Library instance for UART device upon coreboot.
+
+  Copyright (c) 2015, Intel Corporation. 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
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <Base.h>
+#include <Uefi/UefiBaseType.h>
+#include <Library/PlatformHookLib.h>
+#include <Library/CbParseLib.h>
+#include <Library/PcdLib.h>
+
+/**
+  Performs platform specific initialization required for the CPU to access
+  the hardware associated with a SerialPortLib instance.  This function does
+  not intiailzie the serial port hardware itself.  Instead, it initializes
+  hardware devices that are required for the CPU to access the serial port
+  hardware.  This function may be called more than once.
+
+  @retval RETURN_SUCCESS       The platform specific initialization succeeded.
+  @retval RETURN_DEVICE_ERROR  The platform specific initialization could not be completed.
+
+**/
+RETURN_STATUS
+EFIAPI
+PlatformHookSerialPortInitialize (
+  VOID
+  )
+{
+  RETURN_STATUS     Status;
+  UINT32            SerialRegBase;
+  UINT32            SerialRegAccessType;
+
+  Status = CbParseSerialInfo (&SerialRegBase, &SerialRegAccessType, NULL);
+  if (RETURN_ERROR (Status)) {
+    return Status;
+  }
+
+  if (SerialRegAccessType == 2) { //MMIO
+    PcdSetBoolS (PcdSerialUseMmio, TRUE);
+  } else { //IO
+    PcdSetBoolS (PcdSerialUseMmio, FALSE);
+  }
+  PcdSet64S (PcdSerialRegisterBase, (UINT64) SerialRegBase);
+
+  return RETURN_SUCCESS;
+}
+