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
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
/* $Id$ */
/* @file
* Tsunami UART
*/
/*
* Copyright (C) 1998 by the Board of Trustees
* of Leland Stanford Junior University.
* Copyright (C) 1998 Digital Equipment Corporation
*
* This file is part of the SimOS distribution.
* See LICENSE file for terms of the license.
*
*/
#include <string>
#include <vector>
#include "base/inifile.hh"
#include "base/str.hh" // for to_number
#include "base/trace.hh"
#include "dev/console.hh"
#include "dev/tsunami_uart.hh"
#include "mem/functional_mem/memory_control.hh"
#include "sim/builder.hh"
#include "targetarch/ev5.hh"
using namespace std;
#define CONS_INT_TX 0x01 // interrupt enable / state bits
#define CONS_INT_RX 0x02
TsunamiUart::TsunamiUart(const string &name, SimConsole *c,
Addr addr, Addr mask, MemoryController *mmu)
: MmapDevice(name, addr, mask, mmu),
cons(c), status_store(0), next_char(-1)
{
}
Fault
TsunamiUart::read(MemReqPtr req, uint8_t *data)
{
Addr daddr = req->paddr & addr_mask;
switch (req->size) {
case sizeof(uint64_t):
*(uint64_t *)data = 0;
break;
case sizeof(uint32_t):
*(uint32_t *)data = 0;
break;
case sizeof(uint16_t):
*(uint16_t *)data = 0;
break;
case sizeof(uint8_t):
*(uint8_t *)data = 0;
break;
}
switch (daddr) {
case 0xD: // Status Register
{
int status = cons->intStatus();
if (next_char < 0) {
next_char = cons->in();
if (next_char < 0) {
status &= ~CONS_INT_RX;
}
} else {
status |= CONS_INT_RX;
}
if (status_store == 3) {
// RR3 stuff? Don't really understand it, btw
status_store = 0;
if (status & CONS_INT_TX) {
*data = (1 << 4);
return No_Fault;
} else if (status & CONS_INT_RX) {
*data = (1 << 5);
return No_Fault;
} else {
DPRINTF(TsunamiUart, "spurious read\n");
return No_Fault;
}
} else {
int reg = (1 << 2);
if (status & CONS_INT_RX)
reg |= (1 << 0);
*data = reg;
return No_Fault;
}
break;
}
case 0x8: // Data register (RX)
if (next_char < 0)
panic("Invalid character");
DPRINTF(TsunamiUart, "read data register \'%c\' %#02x\n",
isprint(next_char) ? next_char : ' ', next_char);
*data = next_char;
next_char = -1;
// cons.next();
return No_Fault;
}
panic("%s: read daddr=%#x type=read *data=%#x\n", name(), daddr, *data);
return No_Fault;
}
Fault
TsunamiUart::write(MemReqPtr req, const uint8_t *data)
{
Addr daddr = req->paddr & addr_mask;
switch (daddr) {
case 0xb:
status_store = *data;
switch (*data) {
case 0x03: // going to read RR3
return No_Fault;
case 0x28: // Ack of TX
{
if ((cons->intStatus() & CONS_INT_TX) == 0)
panic("Ack of transmit, though there was no interrupt");
cons->clearInt(CONS_INT_TX);
return No_Fault;
}
case 0x00:
case 0x01:
case 0x12:
// going to write data???
return No_Fault;
default:
DPRINTF(TsunamiUart, "writing status register %#x \n",
*(uint64_t *)data);
return No_Fault;
}
case 0x8: // Data register (TX)
cons->out(*(uint64_t *)data);
return No_Fault;
case 0x9: // DLM
DPRINTF(TsunamiUart, "writing to DLM/IER %#x\n", *(uint64_t*)data);
return No_Fault;
case 0xc: // MCR
DPRINTF(TsunamiUart, "writing to MCR %#x\n", *(uint64_t*)data);
return No_Fault;
}
return No_Fault;
}
void
TsunamiUart::serialize(ostream &os)
{
SERIALIZE_SCALAR(status_store);
SERIALIZE_SCALAR(next_char);
}
void
TsunamiUart::unserialize(Checkpoint *cp, const std::string §ion)
{
UNSERIALIZE_SCALAR(status_store);
UNSERIALIZE_SCALAR(next_char);
}
BEGIN_DECLARE_SIM_OBJECT_PARAMS(TsunamiUart)
SimObjectParam<SimConsole *> console;
SimObjectParam<MemoryController *> mmu;
Param<Addr> addr;
Param<Addr> mask;
END_DECLARE_SIM_OBJECT_PARAMS(TsunamiUart)
BEGIN_INIT_SIM_OBJECT_PARAMS(TsunamiUart)
INIT_PARAM(console, "The console"),
INIT_PARAM(mmu, "Memory Controller"),
INIT_PARAM(addr, "Device Address"),
INIT_PARAM(mask, "Address Mask")
END_INIT_SIM_OBJECT_PARAMS(TsunamiUart)
CREATE_SIM_OBJECT(TsunamiUart)
{
return new TsunamiUart(getInstanceName(), console, addr, mask, mmu);
}
REGISTER_SIM_OBJECT("TsunamiUart", TsunamiUart)
|
