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
|
#include "emu.h"
#include "h8_watchdog.h"
DEFINE_DEVICE_TYPE(H8_WATCHDOG, h8_watchdog_device, "h8_watchdog", "H8 watchdog")
const int h8_watchdog_device::div_bh[8] = { 1, 6, 7, 9, 11, 13, 15, 17 };
const int h8_watchdog_device::div_s [8] = { 1, 5, 6, 7, 8, 9, 11, 12 };
h8_watchdog_device::h8_watchdog_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
device_t(mconfig, H8_WATCHDOG, tag, owner, clock),
cpu(*this, DEVICE_SELF_OWNER)
{
}
void h8_watchdog_device::set_info(const char *_intc_tag, int _irq, int _type)
{
intc_tag = _intc_tag;
irq = _irq;
type = _type;
}
uint64_t h8_watchdog_device::internal_update(uint64_t current_time)
{
tcnt_update(current_time);
if(tcsr & TCSR_TME) {
int shift = (type == S ? div_s : div_bh)[tcsr & TCSR_CKS];
uint64_t spos = tcnt_cycle_base >> shift;
return (spos + 0x100 - tcnt) << shift;
} else
return 0;
}
void h8_watchdog_device::tcnt_update(uint64_t cur_time)
{
if(tcsr & TCSR_TME) {
int shift = (type == S ? div_s : div_bh)[tcsr & TCSR_CKS];
if(!cur_time)
cur_time = cpu->total_cycles();
uint64_t spos = tcnt_cycle_base >> shift;
uint64_t epos = cur_time >> shift;
int next_tcnt = tcnt + int(epos - spos);
tcnt = next_tcnt;
tcnt_cycle_base = cur_time;
// logerror("%10lld tcnt %02x -> %03x shift=%d\n", cur_time, tcnt, next_tcnt, shift);
if(next_tcnt >= 0x100) {
if(tcsr & TCSR_WT) {
logerror("%s watchdog triggered\n", machine().time().as_string());
if(type == B && !(tcsr & TCSR_NMI))
intc->internal_interrupt(3);
else
cpu->reset();
} else {
if(!(tcsr & TCSR_OVF)) {
tcsr |= TCSR_OVF;
intc->internal_interrupt(irq);
}
}
}
} else
tcnt = 0;
}
uint16_t h8_watchdog_device::wd_r()
{
if (!machine().side_effects_disabled())
tcnt_update();
return (tcsr << 8) | tcnt;
}
void h8_watchdog_device::wd_w(offs_t offset, uint16_t data, uint16_t mem_mask)
{
if(mem_mask != 0xffff)
return;
if((data & 0xff00) == 0xa500) {
tcnt_update();
if(!(tcsr & TCSR_TME) && (data & TCSR_TME))
tcnt_cycle_base = cpu->total_cycles();
tcsr = data & 0xff;
tcsr |= type == B ? 0x10 : 0x18;
cpu->internal_update();
}
if((data & 0xff00) == 0x5a00) {
if(tcsr & TCSR_TME) {
tcnt = data & 0xff;
tcnt_cycle_base = cpu->total_cycles();
// logerror("%10lld tcnt = %02x\n", tcnt_cycle_base, tcnt);
}
cpu->internal_update();
}
}
uint16_t h8_watchdog_device::rst_r()
{
if (!machine().side_effects_disabled())
logerror("rst_r\n");
return 0;
}
void h8_watchdog_device::rst_w(uint16_t data)
{
if((data & 0xff00) == 0xa500)
logerror("wowf_w %02x\n", data & 0xff);
if((data & 0xff00) == 0x5a00)
logerror("rtse_w %02x\n", data & 0xff);
}
void h8_watchdog_device::device_start()
{
intc = siblingdevice<h8_intc_device>(intc_tag);
}
void h8_watchdog_device::device_reset()
{
tcnt = 0x00;
tcnt_cycle_base = cpu->total_cycles();
tcsr = type == B ? 0x10 : 0x18;
rst = type == S ? 0x1f : 0x3f;
}
|