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   Module Name:  IoLib.c
  14
  15 **/
  16
  17 //
  18 // Include common header file for this module.
  19 //
  20 #include "BaseIoLibIntrinsicInternal.h"
  21
  22 /**
  23   Reads a 64-bit I/O port.
  24
  25   Reads the 64-bit I/O port specified by Port. The 64-bit read value is returned.
  26   This function must guarantee that all I/O read and write operations are
  27   serialized.
  28
  29   If 64-bit I/O port operations are not supported, then ASSERT().
  30
  31   @param  Port  The I/O port to read.
  32
  33   @return The value read.
  34
  35 **/
  36 UINT64
  37 EFIAPI
  38 IoRead64 (
  39   IN      UINTN                     Port
  40   )
  41 {
  42   ASSERT (FALSE);
  43   return 0;
  44 }
  45
  46 /**
  47   Writes a 64-bit I/O port.
  48
  49   Writes the 64-bit I/O port specified by Port with the value specified by Value
  50   and returns Value. This function must guarantee that all I/O read and write
  51   operations are serialized.
  52
  53   If 64-bit I/O port operations are not supported, then ASSERT().
  54
  55   @param  Port  The I/O port to write.
  56   @param  Value The value to write to the I/O port.
  57
  58   @return The value written the I/O port.
  59
  60 **/
  61 UINT64
  62 EFIAPI
  63 IoWrite64 (
  64   IN      UINTN                     Port,
  65   IN      UINT64                    Value
  66   )
  67 {
  68   ASSERT (FALSE);
  69   return 0;
  70 }
  71