1 files changed, 77 insertions, 0 deletions
diff --git a/EdkModulePkg/Library/EdkSerialPortLibNull/SerialPortLibNull.c b/EdkModulePkg/Library/EdkSerialPortLibNull/SerialPortLibNull.c
new file mode 100644
index 0000000000..af9b95705f
--- /dev/null
+++ b/EdkModulePkg/Library/EdkSerialPortLibNull/SerialPortLibNull.c
@@ -0,0 +1,77 @@
+/** @file
+  Serial I/O Port library functions with no library constructor/destructor
+
+  Copyright (c) 2006, Intel Corporation
+  All rights reserved. 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.
+
+  Module Name:  SerialPortLibNull.c
+
+**/
+
+/**
+
+  Programmed hardware of Serial port.
+
+**/
+EFI_STATUS
+EFIAPI
+SerialPortInitialize (
+  VOID
+  )
+{
+  return EFI_UNSUPPORTED;
+}
+
+/**
+  Write data to serial device. 
+ 
+  If the buffer is NULL, then ASSERT(); 
+  if NumberOfBytes is zero, then ASSERT(). 
+
+  @param  Buffer           Point of data buffer which need to be writed.
+  @param  NumberOfBytes    Number of output bytes which are cached in Buffer.
+
+  @retval 0                Write data failed.
+  @retval !0               Actual number of bytes writed to serial device.
+
+**/
+UINTN
+EFIAPI
+SerialPortWrite (
+  IN UINT8 	   *Buffer,
+  IN UINTN 	   NumberOfBytes
+)
+{
+  return 0;
+}
+
+
+/**
+  Read data from serial device and save the datas in buffer.
+ 
+  If the buffer is NULL, then ASSERT(); 
+  if NumberOfBytes is zero, then ASSERT(). 
+
+  @param  Buffer           Point of data buffer which need to be writed.
+  @param  NumberOfBytes    Number of output bytes which are cached in Buffer.
+
+  @retval 0                Read data failed.
+  @retval !0               Aactual number of bytes read from serial device.
+
+**/
+UINTN
+EFIAPI
+SerialPortRead (
+  OUT UINT8 	*Buffer,
+  IN  UINTN 	NumberOfBytes
+)
+{
+  return 0;
+}
+