1#include <linux/interrupt.h>
 
 2
 3#include <asm/irq.h>
 4#include <asm/traps.h>
 5#include <asm/apollohw.h>
 6
 7void dn_process_int(unsigned int irq, struct pt_regs *fp)
 8{
 9	__m68k_handle_int(irq, fp);
10
11	*(volatile unsigned char *)(pica)=0x20;
12	*(volatile unsigned char *)(picb)=0x20;
13}
14
15int apollo_irq_startup(unsigned int irq)
16{
 
 
17	if (irq < 8)
18		*(volatile unsigned char *)(pica+1) &= ~(1 << irq);
19	else
20		*(volatile unsigned char *)(picb+1) &= ~(1 << (irq - 8));
21	return 0;
22}
23
24void apollo_irq_shutdown(unsigned int irq)
25{
 
 
26	if (irq < 8)
27		*(volatile unsigned char *)(pica+1) |= (1 << irq);
28	else
29		*(volatile unsigned char *)(picb+1) |= (1 << (irq - 8));
30}
31
32static struct irq_controller apollo_irq_controller = {
 
 
 
 
 
 
33	.name           = "apollo",
34	.lock           = __SPIN_LOCK_UNLOCKED(apollo_irq_controller.lock),
35	.startup        = apollo_irq_startup,
36	.shutdown       = apollo_irq_shutdown,
37};
38
39
40void __init dn_init_IRQ(void)
41{
42	m68k_setup_user_interrupt(VEC_USER + 96, 16, dn_process_int);
43	m68k_setup_irq_controller(&apollo_irq_controller, IRQ_APOLLO, 16);
 
44}

 1// SPDX-License-Identifier: GPL-2.0
 2#include <linux/interrupt.h>
 3#include <linux/irq.h>
 4
 
 5#include <asm/traps.h>
 6#include <asm/apollohw.h>
 7
 8#include "apollo.h"
 
 
 
 
 
 
 9
10static unsigned int apollo_irq_startup(struct irq_data *data)
11{
12	unsigned int irq = data->irq;
13
14	if (irq < 8)
15		*(volatile unsigned char *)(pica+1) &= ~(1 << irq);
16	else
17		*(volatile unsigned char *)(picb+1) &= ~(1 << (irq - 8));
18	return 0;
19}
20
21static void apollo_irq_shutdown(struct irq_data *data)
22{
23	unsigned int irq = data->irq;
24
25	if (irq < 8)
26		*(volatile unsigned char *)(pica+1) |= (1 << irq);
27	else
28		*(volatile unsigned char *)(picb+1) |= (1 << (irq - 8));
29}
30
31static void apollo_irq_eoi(struct irq_data *data)
32{
33	*(volatile unsigned char *)(pica) = 0x20;
34	*(volatile unsigned char *)(picb) = 0x20;
35}
36
37static struct irq_chip apollo_irq_chip = {
38	.name           = "apollo",
39	.irq_startup    = apollo_irq_startup,
40	.irq_shutdown   = apollo_irq_shutdown,
41	.irq_eoi	= apollo_irq_eoi,
42};
43
44
45void __init dn_init_IRQ(void)
46{
47	m68k_setup_user_interrupt(VEC_USER + 96, 16);
48	m68k_setup_irq_controller(&apollo_irq_chip, handle_fasteoi_irq,
49				  IRQ_APOLLO, 16);
50}