1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/Assertions.h>
#include <AK/LogStream.h>
#include <AK/String.h>
#include <AK/Types.h>
#include <Kernel/Arch/i386/CPU.h>
namespace IO {
inline u8 in8(u16 port)
{
u8 value;
asm volatile("inb %1, %0"
: "=a"(value)
: "Nd"(port));
return value;
}
inline u16 in16(u16 port)
{
u16 value;
asm volatile("inw %1, %0"
: "=a"(value)
: "Nd"(port));
return value;
}
inline u32 in32(u16 port)
{
u32 value;
asm volatile("inl %1, %0"
: "=a"(value)
: "Nd"(port));
return value;
}
inline void repeated_in16(u16 port, u16* buffer, int buffer_size)
{
asm volatile("rep insw"
: "+D"(buffer), "+c"(buffer_size)
: "d"(port)
: "memory");
}
inline void out8(u16 port, u8 value)
{
asm volatile("outb %0, %1" ::"a"(value), "Nd"(port));
}
inline void out16(u16 port, u16 value)
{
asm volatile("outw %0, %1" ::"a"(value), "Nd"(port));
}
inline void out32(u16 port, u32 value)
{
asm volatile("outl %0, %1" ::"a"(value), "Nd"(port));
}
inline void repeated_out16(u16 port, const u16* data, int data_size)
{
asm volatile("rep outsw"
: "+S"(data), "+c"(data_size)
: "d"(port));
}
inline void delay(size_t microseconds)
{
for (size_t i = 0; i < microseconds; ++i)
IO::in8(0x80);
}
}
class IOAddress {
public:
IOAddress() { }
explicit IOAddress(u16 address)
: m_address(address)
{
}
IOAddress offset(u16 o) const { return IOAddress(m_address + o); }
u16 get() const { return m_address; }
void set(u16 address) { m_address = address; }
void mask(u16 m) { m_address &= m; }
template<typename T>
ALWAYS_INLINE T in()
{
if constexpr (sizeof(T) == 4)
return IO::in32(get());
if constexpr (sizeof(T) == 2)
return IO::in16(get());
if constexpr (sizeof(T) == 1)
return IO::in8(get());
ASSERT_NOT_REACHED();
}
template<typename T>
ALWAYS_INLINE void out(T value)
{
if constexpr (sizeof(T) == 4) {
IO::out32(get(), value);
return;
}
if constexpr (sizeof(T) == 2) {
IO::out16(get(), value);
return;
}
if constexpr (sizeof(T) == 1) {
IO::out8(get(), value);
return;
}
ASSERT_NOT_REACHED();
}
inline void out(u32 value, u8 bit_width)
{
if (bit_width == 32) {
IO::out32(get(), value);
return;
}
if (bit_width == 16) {
IO::out16(get(), value);
return;
}
if (bit_width == 8) {
IO::out8(get(), value);
return;
}
ASSERT_NOT_REACHED();
}
bool is_null() const { return m_address == 0; }
bool operator==(const IOAddress& other) const { return m_address == other.m_address; }
bool operator!=(const IOAddress& other) const { return m_address != other.m_address; }
bool operator>(const IOAddress& other) const { return m_address > other.m_address; }
bool operator>=(const IOAddress& other) const { return m_address >= other.m_address; }
bool operator<(const IOAddress& other) const { return m_address < other.m_address; }
bool operator<=(const IOAddress& other) const { return m_address <= other.m_address; }
private:
u16 m_address { 0 };
};
inline const LogStream& operator<<(const LogStream& stream, IOAddress value)
{
return stream << "IO " << String::format("%x", value.get());
}
|
