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
IoRead8(IN UINTN Port)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
IoWrite8(IN UINTN Port,IN UINT8 Value)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
IoRead16(IN UINTN Port)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
IoWrite16(IN UINTN Port,IN UINT16 Value)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
IoRead32(IN UINTN Port)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
IoWrite32(IN UINTN Port,IN UINT32 Value)164 IoWrite32 (
165 IN UINTN Port,
166 IN UINT32 Value
167 )
168 {
169 ASSERT (FALSE);
170 return 0;
171 }
172