Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#include <linux/interrupt.h>
2#include <linux/irq.h>
3
4#include <asm/traps.h>
5#include <asm/apollohw.h>
6
7unsigned int apollo_irq_startup(struct irq_data *data)
8{
9 unsigned int irq = data->irq;
10
11 if (irq < 8)
12 *(volatile unsigned char *)(pica+1) &= ~(1 << irq);
13 else
14 *(volatile unsigned char *)(picb+1) &= ~(1 << (irq - 8));
15 return 0;
16}
17
18void apollo_irq_shutdown(struct irq_data *data)
19{
20 unsigned int irq = data->irq;
21
22 if (irq < 8)
23 *(volatile unsigned char *)(pica+1) |= (1 << irq);
24 else
25 *(volatile unsigned char *)(picb+1) |= (1 << (irq - 8));
26}
27
28void apollo_irq_eoi(struct irq_data *data)
29{
30 *(volatile unsigned char *)(pica) = 0x20;
31 *(volatile unsigned char *)(picb) = 0x20;
32}
33
34static struct irq_chip apollo_irq_chip = {
35 .name = "apollo",
36 .irq_startup = apollo_irq_startup,
37 .irq_shutdown = apollo_irq_shutdown,
38 .irq_eoi = apollo_irq_eoi,
39};
40
41
42void __init dn_init_IRQ(void)
43{
44 m68k_setup_user_interrupt(VEC_USER + 96, 16);
45 m68k_setup_irq_controller(&apollo_irq_chip, handle_fasteoi_irq,
46 IRQ_APOLLO, 16);
47}