blob: 2bdab498b6c1dd8286281ae65721df1ecd40862c (
plain)
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
|
#include <linux/interrupt.h>
#include <asm/irq.h>
#include <asm/traps.h>
#include <asm/apollohw.h>
void dn_process_int(unsigned int irq, struct pt_regs *fp)
{
__m68k_handle_int(irq, fp);
*(volatile unsigned char *)(pica)=0x20;
*(volatile unsigned char *)(picb)=0x20;
}
unsigned int apollo_irq_startup(struct irq_data *data)
{
unsigned int irq = data->irq;
if (irq < 8)
*(volatile unsigned char *)(pica+1) &= ~(1 << irq);
else
*(volatile unsigned char *)(picb+1) &= ~(1 << (irq - 8));
return 0;
}
void apollo_irq_shutdown(struct irq_data *data)
{
unsigned int irq = data->irq;
if (irq < 8)
*(volatile unsigned char *)(pica+1) |= (1 << irq);
else
*(volatile unsigned char *)(picb+1) |= (1 << (irq - 8));
}
static struct irq_chip apollo_irq_chip = {
.name = "apollo",
.irq_startup = apollo_irq_startup,
.irq_shutdown = apollo_irq_shutdown,
};
void __init dn_init_IRQ(void)
{
m68k_setup_user_interrupt(VEC_USER + 96, 16, dn_process_int);
m68k_setup_irq_chip(&apollo_irq_chip, IRQ_APOLLO, 16);
}
|
