MdePkg/Library/BaseIoLibIntrinsic/IoLib.c

   1 /** @file
   2   Common I/O Library routines.
   3
   4   Copyright (c) 2006, Intel Corporation<BR>
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 //
  16 // Include common header file for this module.
  17 //
  18 #include "BaseIoLibIntrinsicInternal.h"
  19
  20 /**
  21   Reads a 64-bit I/O port.
  22
  23   Reads the 64-bit I/O port specified by Port. The 64-bit read value is returned.
  24   This function must guarantee that all I/O read and write operations are
  25   serialized.
  26
  27   If 64-bit I/O port operations are not supported, then ASSERT().
  28
  29   @param  Port  The I/O port to read.
  30
  31   @return The value read.
  32
  33 **/
  34 UINT64
  35 EFIAPI
  36 IoRead64 (
  37   IN      UINTN                     Port
  38   )
  39 {
  40   ASSERT (FALSE);
  41   return 0;
  42 }
  43
  44 /**
  45   Writes a 64-bit I/O port.
  46
  47   Writes the 64-bit I/O port specified by Port with the value specified by Value
  48   and returns Value. This function must guarantee that all I/O read and write
  49   operations are serialized.
  50
  51   If 64-bit I/O port operations are not supported, then ASSERT().
  52
  53   @param  Port  The I/O port to write.
  54   @param  Value The value to write to the I/O port.
  55
  56   @return The value written the I/O port.
  57
  58 **/
  59 UINT64
  60 EFIAPI
  61 IoWrite64 (
  62   IN      UINTN                     Port,
  63   IN      UINT64                    Value
  64   )
  65 {
  66   ASSERT (FALSE);
  67   return 0;
  68 }
  69