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
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
|
/*
* QEMU ICH9 TCO emulation
*
* Copyright (c) 2015 Paulo Alcantara <pcacjr@zytor.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "sysemu/watchdog.h"
#include "hw/i386/ich9.h"
#include "hw/acpi/tco.h"
//#define DEBUG
#ifdef DEBUG
#define TCO_DEBUG(fmt, ...) \
do { \
fprintf(stderr, "%s "fmt, __func__, ## __VA_ARGS__); \
} while (0)
#else
#define TCO_DEBUG(fmt, ...) do { } while (0)
#endif
enum {
TCO_RLD_DEFAULT = 0x0000,
TCO_DAT_IN_DEFAULT = 0x00,
TCO_DAT_OUT_DEFAULT = 0x00,
TCO1_STS_DEFAULT = 0x0000,
TCO2_STS_DEFAULT = 0x0000,
TCO1_CNT_DEFAULT = 0x0000,
TCO2_CNT_DEFAULT = 0x0008,
TCO_MESSAGE1_DEFAULT = 0x00,
TCO_MESSAGE2_DEFAULT = 0x00,
TCO_WDCNT_DEFAULT = 0x00,
TCO_TMR_DEFAULT = 0x0004,
SW_IRQ_GEN_DEFAULT = 0x03,
};
static inline void tco_timer_reload(TCOIORegs *tr)
{
tr->expire_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
((int64_t)(tr->tco.tmr & TCO_TMR_MASK) * TCO_TICK_NSEC);
timer_mod(tr->tco_timer, tr->expire_time);
}
static inline void tco_timer_stop(TCOIORegs *tr)
{
tr->expire_time = -1;
timer_del(tr->tco_timer);
}
static void tco_timer_expired(void *opaque)
{
TCOIORegs *tr = opaque;
ICH9LPCPMRegs *pm = container_of(tr, ICH9LPCPMRegs, tco_regs);
ICH9LPCState *lpc = container_of(pm, ICH9LPCState, pm);
uint32_t gcs = pci_get_long(lpc->chip_config + ICH9_CC_GCS);
tr->tco.rld = 0;
tr->tco.sts1 |= TCO_TIMEOUT;
if (++tr->timeouts_no == 2) {
tr->tco.sts2 |= TCO_SECOND_TO_STS;
tr->tco.sts2 |= TCO_BOOT_STS;
tr->timeouts_no = 0;
if (!lpc->pin_strap.spkr_hi && !(gcs & ICH9_CC_GCS_NO_REBOOT)) {
watchdog_perform_action();
tco_timer_stop(tr);
return;
}
}
if (pm->smi_en & ICH9_PMIO_SMI_EN_TCO_EN) {
ich9_generate_smi();
}
tr->tco.rld = tr->tco.tmr;
tco_timer_reload(tr);
}
/* NOTE: values of 0 or 1 will be ignored by ICH */
static inline int can_start_tco_timer(TCOIORegs *tr)
{
return !(tr->tco.cnt1 & TCO_TMR_HLT) && tr->tco.tmr > 1;
}
static uint32_t tco_ioport_readw(TCOIORegs *tr, uint32_t addr)
{
uint16_t rld;
switch (addr) {
case TCO_RLD:
if (tr->expire_time != -1) {
int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
int64_t elapsed = (tr->expire_time - now) / TCO_TICK_NSEC;
rld = (uint16_t)elapsed | (tr->tco.rld & ~TCO_RLD_MASK);
} else {
rld = tr->tco.rld;
}
return rld;
case TCO_DAT_IN:
return tr->tco.din;
case TCO_DAT_OUT:
return tr->tco.dout;
case TCO1_STS:
return tr->tco.sts1;
case TCO2_STS:
return tr->tco.sts2;
case TCO1_CNT:
return tr->tco.cnt1;
case TCO2_CNT:
return tr->tco.cnt2;
case TCO_MESSAGE1:
return tr->tco.msg1;
case TCO_MESSAGE2:
return tr->tco.msg2;
case TCO_WDCNT:
return tr->tco.wdcnt;
case TCO_TMR:
return tr->tco.tmr;
case SW_IRQ_GEN:
return tr->sw_irq_gen;
}
return 0;
}
static void tco_ioport_writew(TCOIORegs *tr, uint32_t addr, uint32_t val)
{
switch (addr) {
case TCO_RLD:
tr->timeouts_no = 0;
if (can_start_tco_timer(tr)) {
tr->tco.rld = tr->tco.tmr;
tco_timer_reload(tr);
} else {
tr->tco.rld = val;
}
break;
case TCO_DAT_IN:
tr->tco.din = val;
tr->tco.sts1 |= SW_TCO_SMI;
ich9_generate_smi();
break;
case TCO_DAT_OUT:
tr->tco.dout = val;
tr->tco.sts1 |= TCO_INT_STS;
/* TODO: cause an interrupt, as selected by the TCO_INT_SEL bits */
break;
case TCO1_STS:
tr->tco.sts1 = val & TCO1_STS_MASK;
break;
case TCO2_STS:
tr->tco.sts2 = val & TCO2_STS_MASK;
break;
case TCO1_CNT:
val &= TCO1_CNT_MASK;
/*
* once TCO_LOCK bit is set, it can not be cleared by software. a reset
* is required to change this bit from 1 to 0 -- it defaults to 0.
*/
tr->tco.cnt1 = val | (tr->tco.cnt1 & TCO_LOCK);
if (can_start_tco_timer(tr)) {
tr->tco.rld = tr->tco.tmr;
tco_timer_reload(tr);
} else {
tco_timer_stop(tr);
}
break;
case TCO2_CNT:
tr->tco.cnt2 = val;
break;
case TCO_MESSAGE1:
tr->tco.msg1 = val;
break;
case TCO_MESSAGE2:
tr->tco.msg2 = val;
break;
case TCO_WDCNT:
tr->tco.wdcnt = val;
break;
case TCO_TMR:
tr->tco.tmr = val;
break;
case SW_IRQ_GEN:
tr->sw_irq_gen = val;
break;
}
}
static uint64_t tco_io_readw(void *opaque, hwaddr addr, unsigned width)
{
TCOIORegs *tr = opaque;
return tco_ioport_readw(tr, addr);
}
static void tco_io_writew(void *opaque, hwaddr addr, uint64_t val,
unsigned width)
{
TCOIORegs *tr = opaque;
tco_ioport_writew(tr, addr, val);
}
static const MemoryRegionOps tco_io_ops = {
.read = tco_io_readw,
.write = tco_io_writew,
.valid.min_access_size = 1,
.valid.max_access_size = 4,
.impl.min_access_size = 1,
.impl.max_access_size = 2,
.endianness = DEVICE_LITTLE_ENDIAN,
};
void acpi_pm_tco_init(TCOIORegs *tr, MemoryRegion *parent)
{
*tr = (TCOIORegs) {
.tco = {
.rld = TCO_RLD_DEFAULT,
.din = TCO_DAT_IN_DEFAULT,
.dout = TCO_DAT_OUT_DEFAULT,
.sts1 = TCO1_STS_DEFAULT,
.sts2 = TCO2_STS_DEFAULT,
.cnt1 = TCO1_CNT_DEFAULT,
.cnt2 = TCO2_CNT_DEFAULT,
.msg1 = TCO_MESSAGE1_DEFAULT,
.msg2 = TCO_MESSAGE2_DEFAULT,
.wdcnt = TCO_WDCNT_DEFAULT,
.tmr = TCO_TMR_DEFAULT,
},
.sw_irq_gen = SW_IRQ_GEN_DEFAULT,
.tco_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, tco_timer_expired, tr),
.expire_time = -1,
.timeouts_no = 0,
};
memory_region_init_io(&tr->io, memory_region_owner(parent),
&tco_io_ops, tr, "sm-tco", ICH9_PMIO_TCO_LEN);
memory_region_add_subregion(parent, ICH9_PMIO_TCO_RLD, &tr->io);
}
const VMStateDescription vmstate_tco_io_sts = {
.name = "tco io device status",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT16(tco.rld, TCOIORegs),
VMSTATE_UINT8(tco.din, TCOIORegs),
VMSTATE_UINT8(tco.dout, TCOIORegs),
VMSTATE_UINT16(tco.sts1, TCOIORegs),
VMSTATE_UINT16(tco.sts2, TCOIORegs),
VMSTATE_UINT16(tco.cnt1, TCOIORegs),
VMSTATE_UINT16(tco.cnt2, TCOIORegs),
VMSTATE_UINT8(tco.msg1, TCOIORegs),
VMSTATE_UINT8(tco.msg2, TCOIORegs),
VMSTATE_UINT8(tco.wdcnt, TCOIORegs),
VMSTATE_UINT16(tco.tmr, TCOIORegs),
VMSTATE_UINT8(sw_irq_gen, TCOIORegs),
VMSTATE_TIMER_PTR(tco_timer, TCOIORegs),
VMSTATE_INT64(expire_time, TCOIORegs),
VMSTATE_UINT8(timeouts_no, TCOIORegs),
VMSTATE_END_OF_LIST()
}
};
|
