vmxnet3: Use common MAC address tracing macros
[qemu.git] / hw / watchdog / wdt_ib700.c
1 /*
2 * Virtual hardware watchdog.
3 *
4 * Copyright (C) 2009 Red Hat Inc.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 *
19 * By Richard W.M. Jones (rjones@redhat.com).
20 */
21
22 #include "qemu/osdep.h"
23 #include "qemu-common.h"
24 #include "qemu/timer.h"
25 #include "sysemu/watchdog.h"
26 #include "hw/hw.h"
27 #include "hw/isa/isa.h"
28 #include "hw/i386/pc.h"
29
30 /*#define IB700_DEBUG 1*/
31
32 #ifdef IB700_DEBUG
33 #define ib700_debug(fs,...) \
34 fprintf(stderr,"ib700: %s: "fs,__func__,##__VA_ARGS__)
35 #else
36 #define ib700_debug(fs,...)
37 #endif
38
39 #define TYPE_IB700 "ib700"
40 #define IB700(obj) OBJECT_CHECK(IB700State, (obj), TYPE_IB700)
41
42 typedef struct IB700state {
43 ISADevice parent_obj;
44
45 QEMUTimer *timer;
46
47 PortioList port_list;
48 } IB700State;
49
50 /* This is the timer. We use a global here because the watchdog
51 * code ensures there is only one watchdog (it is located at a fixed,
52 * unchangeable IO port, so there could only ever be one anyway).
53 */
54
55 /* A write to this register enables the timer. */
56 static void ib700_write_enable_reg(void *vp, uint32_t addr, uint32_t data)
57 {
58 IB700State *s = vp;
59 static int time_map[] = {
60 30, 28, 26, 24, 22, 20, 18, 16,
61 14, 12, 10, 8, 6, 4, 2, 0
62 };
63 int64_t timeout;
64
65 ib700_debug("addr = %x, data = %x\n", addr, data);
66
67 timeout = (int64_t) time_map[data & 0xF] * NANOSECONDS_PER_SECOND;
68 timer_mod(s->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + timeout);
69 }
70
71 /* A write (of any value) to this register disables the timer. */
72 static void ib700_write_disable_reg(void *vp, uint32_t addr, uint32_t data)
73 {
74 IB700State *s = vp;
75
76 ib700_debug("addr = %x, data = %x\n", addr, data);
77
78 timer_del(s->timer);
79 }
80
81 /* This is called when the watchdog expires. */
82 static void ib700_timer_expired(void *vp)
83 {
84 IB700State *s = vp;
85
86 ib700_debug("watchdog expired\n");
87
88 watchdog_perform_action();
89 timer_del(s->timer);
90 }
91
92 static const VMStateDescription vmstate_ib700 = {
93 .name = "ib700_wdt",
94 .version_id = 0,
95 .minimum_version_id = 0,
96 .fields = (VMStateField[]) {
97 VMSTATE_TIMER_PTR(timer, IB700State),
98 VMSTATE_END_OF_LIST()
99 }
100 };
101
102 static const MemoryRegionPortio wdt_portio_list[] = {
103 { 0x441, 2, 1, .write = ib700_write_disable_reg, },
104 { 0x443, 2, 1, .write = ib700_write_enable_reg, },
105 PORTIO_END_OF_LIST(),
106 };
107
108 static void wdt_ib700_realize(DeviceState *dev, Error **errp)
109 {
110 IB700State *s = IB700(dev);
111
112 ib700_debug("watchdog init\n");
113
114 s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, ib700_timer_expired, s);
115
116 portio_list_init(&s->port_list, OBJECT(s), wdt_portio_list, s, "ib700");
117 portio_list_add(&s->port_list, isa_address_space_io(&s->parent_obj), 0);
118 }
119
120 static void wdt_ib700_reset(DeviceState *dev)
121 {
122 IB700State *s = IB700(dev);
123
124 ib700_debug("watchdog reset\n");
125
126 timer_del(s->timer);
127 }
128
129 static WatchdogTimerModel model = {
130 .wdt_name = "ib700",
131 .wdt_description = "iBASE 700",
132 };
133
134 static void wdt_ib700_class_init(ObjectClass *klass, void *data)
135 {
136 DeviceClass *dc = DEVICE_CLASS(klass);
137
138 dc->realize = wdt_ib700_realize;
139 dc->reset = wdt_ib700_reset;
140 dc->vmsd = &vmstate_ib700;
141 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
142 }
143
144 static const TypeInfo wdt_ib700_info = {
145 .name = TYPE_IB700,
146 .parent = TYPE_ISA_DEVICE,
147 .instance_size = sizeof(IB700State),
148 .class_init = wdt_ib700_class_init,
149 };
150
151 static void wdt_ib700_register_types(void)
152 {
153 watchdog_add_model(&model);
154 type_register_static(&wdt_ib700_info);
155 }
156
157 type_init(wdt_ib700_register_types)