25 |
* SUCH DAMAGE. |
* SUCH DAMAGE. |
26 |
* |
* |
27 |
* |
* |
28 |
* $Id: dev_8253.c,v 1.5 2005/10/26 14:37:03 debug Exp $ |
* $Id: dev_8253.c,v 1.7 2005/11/13 00:14:08 debug Exp $ |
29 |
* |
* |
30 |
* 8253/8254 Programmable Interval Timer. |
* 8253/8254 Programmable Interval Timer. |
31 |
* |
* |
51 |
|
|
52 |
struct pit8253_data { |
struct pit8253_data { |
53 |
int irq_nr; |
int irq_nr; |
54 |
|
int in_use; |
55 |
int counter_select; |
int counter_select; |
56 |
}; |
}; |
57 |
|
|
62 |
void dev_8253_tick(struct cpu *cpu, void *extra) |
void dev_8253_tick(struct cpu *cpu, void *extra) |
63 |
{ |
{ |
64 |
struct pit8253_data *d = (struct pit8253_data *) extra; |
struct pit8253_data *d = (struct pit8253_data *) extra; |
65 |
|
|
66 |
|
if (!d->in_use) |
67 |
|
return; |
68 |
|
|
69 |
cpu_interrupt(cpu, d->irq_nr); |
cpu_interrupt(cpu, d->irq_nr); |
70 |
} |
} |
71 |
|
|
83 |
if (writeflag == MEM_WRITE) |
if (writeflag == MEM_WRITE) |
84 |
idata = memory_readmax64(cpu, data, len); |
idata = memory_readmax64(cpu, data, len); |
85 |
|
|
86 |
|
d->in_use = 1; |
87 |
|
|
88 |
/* TODO: ack somewhere else */ |
/* TODO: ack somewhere else */ |
89 |
cpu_interrupt_ack(cpu, d->irq_nr); |
cpu_interrupt_ack(cpu, d->irq_nr); |
90 |
|
|
94 |
/* TODO */ |
/* TODO */ |
95 |
} else { |
} else { |
96 |
/* TODO */ |
/* TODO */ |
97 |
odata = 1; |
/* odata = 1; */ |
98 |
odata = random(); |
odata = random(); |
99 |
} |
} |
100 |
break; |
break; |
101 |
case 0x03: |
case 0x03: |
136 |
} |
} |
137 |
memset(d, 0, sizeof(struct pit8253_data)); |
memset(d, 0, sizeof(struct pit8253_data)); |
138 |
d->irq_nr = devinit->irq_nr; |
d->irq_nr = devinit->irq_nr; |
139 |
|
d->in_use = devinit->in_use; |
140 |
|
|
141 |
memory_device_register(devinit->machine->memory, devinit->name, |
memory_device_register(devinit->machine->memory, devinit->name, |
142 |
devinit->addr, DEV_8253_LENGTH, dev_8253_access, (void *)d, |
devinit->addr, DEV_8253_LENGTH, dev_8253_access, (void *)d, |
143 |
MEM_DEFAULT, NULL); |
DM_DEFAULT, NULL); |
144 |
|
|
145 |
machine_add_tickfunction(devinit->machine, dev_8253_tick, |
machine_add_tickfunction(devinit->machine, dev_8253_tick, |
146 |
d, TICK_SHIFT); |
d, TICK_SHIFT); |