MdePkg/Library/BaseIoLibIntrinsic/IoLibEbc.c

   1 /** @file
   2   I/O Library for EBC.
   3
   4   EBC does not support port I/O.  All APIs in this file ASSERT().
   5
   6   Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
   7   This program and the accompanying materials
   8   are licensed and made available under the terms and conditions of the BSD License
   9   which accompanies this distribution.  The full text of the license may be found at
  10   http://opensource.org/licenses/bsd-license.php.
  11
  12   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  13   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  14
  15 **/
  16
  17 #include "BaseIoLibIntrinsicInternal.h"
  18
  19 /**
  20   Reads an 8-bit I/O port.
  21
  22   Reads the 8-bit I/O port specified by Port. The 8-bit read value is returned.
  23   This function must guarantee that all I/O read and write operations are
  24   serialized.
  25
  26   If 8-bit I/O port operations are not supported, then ASSERT().
  27
  28   @param  Port  The I/O port to read.
  29
  30   @return The value read.
  31
  32 **/
  33 UINT8
  34 EFIAPI
  35 IoRead8 (
  36   IN      UINTN                     Port
  37   )
  38 {
  39   ASSERT (FALSE);
  40   return 0;
  41 }
  42
  43 /**
  44   Writes an 8-bit I/O port.
  45
  46   Writes the 8-bit I/O port specified by Port with the value specified by Value
  47   and returns Value. This function must guarantee that all I/O read and write
  48   operations are serialized.
  49
  50   If 8-bit I/O port operations are not supported, then ASSERT().
  51
  52   @param  Port  The I/O port to write.
  53   @param  Value The value to write to the I/O port.
  54
  55   @return The value written to the I/O port.
  56
  57 **/
  58 UINT8
  59 EFIAPI
  60 IoWrite8 (
  61   IN      UINTN                     Port,
  62   IN      UINT8                     Value
  63   )
  64 {
  65   ASSERT (FALSE);
  66   return 0;
  67 }
  68
  69 /**
  70   Reads a 16-bit I/O port.
  71
  72   Reads the 16-bit I/O port specified by Port. The 16-bit read value is returned.
  73   This function must guarantee that all I/O read and write operations are
  74   serialized.
  75
  76   If 16-bit I/O port operations are not supported, then ASSERT().
  77   If Port is not aligned on a 16-bit boundary, then ASSERT().
  78
  79   @param  Port  The I/O port to read.
  80
  81   @return The value read.
  82
  83 **/
  84 UINT16
  85 EFIAPI
  86 IoRead16 (
  87   IN      UINTN                     Port
  88   )
  89 {
  90   ASSERT (FALSE);
  91   return 0;
  92 }
  93
  94 /**
  95   Writes a 16-bit I/O port.
  96
  97   Writes the 16-bit I/O port specified by Port with the value specified by Value
  98   and returns Value. This function must guarantee that all I/O read and write
  99   operations are serialized.
 100
 101   If 16-bit I/O port operations are not supported, then ASSERT().
 102   If Port is not aligned on a 16-bit boundary, then ASSERT().
 103
 104   @param  Port  The I/O port to write.
 105   @param  Value The value to write to the I/O port.
 106
 107   @return The value written to the I/O port.
 108
 109 **/
 110 UINT16
 111 EFIAPI
 112 IoWrite16 (
 113   IN      UINTN                     Port,
 114   IN      UINT16                    Value
 115   )
 116 {
 117   ASSERT (FALSE);
 118   return 0;
 119 }
 120
 121 /**
 122   Reads a 32-bit I/O port.
 123
 124   Reads the 32-bit I/O port specified by Port. The 32-bit read value is returned.
 125   This function must guarantee that all I/O read and write operations are
 126   serialized.
 127
 128   If 32-bit I/O port operations are not supported, then ASSERT().
 129   If Port is not aligned on a 32-bit boundary, then ASSERT().
 130
 131   @param  Port  The I/O port to read.
 132
 133   @return The value read.
 134
 135 **/
 136 UINT32
 137 EFIAPI
 138 IoRead32 (
 139   IN      UINTN                     Port
 140   )
 141 {
 142   ASSERT (FALSE);
 143   return 0;
 144 }
 145
 146 /**
 147   Writes a 32-bit I/O port.
 148
 149   Writes the 32-bit I/O port specified by Port with the value specified by Value
 150   and returns Value. This function must guarantee that all I/O read and write
 151   operations are serialized.
 152
 153   If 32-bit I/O port operations are not supported, then ASSERT().
 154   If Port is not aligned on a 32-bit boundary, then ASSERT().
 155
 156   @param  Port  The I/O port to write.
 157   @param  Value The value to write to the I/O port.
 158
 159   @return The value written to the I/O port.
 160
 161 **/
 162 UINT32
 163 EFIAPI
 164 IoWrite32 (
 165   IN      UINTN                     Port,
 166   IN      UINT32                    Value
 167   )
 168 {
 169   ASSERT (FALSE);
 170   return 0;
 171 }