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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
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
42typedef struct IB700state {
43 ISADevice parent_obj;
44
45 QEMUTimer *timer;
46
47 PortioList port_list;
48} IB700State;
49
50
51
52
53
54
55
56static 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
72static 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
82static 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
92static 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
102static 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
108static 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
120static 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
129static WatchdogTimerModel model = {
130 .wdt_name = "ib700",
131 .wdt_description = "iBASE 700",
132};
133
134static 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
144static 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
151static void wdt_ib700_register_types(void)
152{
153 watchdog_add_model(&model);
154 type_register_static(&wdt_ib700_info);
155}
156
157type_init(wdt_ib700_register_types)
158