1/*
2 * Copyright (C) 2003 Ralf Baechle
3 *
4 * This program is free software; you can redistribute	it and/or modify it
5 * under  the terms of	the GNU General	 Public License as published by the
6 * Free Software Foundation;  either version 2 of the  License, or (at your
7 * option) any later version.
8 *
9 * Handler for RM7000 extended interrupts.  These are a non-standard
10 * feature so we handle them separately from standard interrupts.
11 */
12#include <linux/init.h>
13#include <linux/interrupt.h>
14#include <linux/irq.h>
15#include <linux/kernel.h>
16
17#include <asm/irq_cpu.h>
18#include <asm/mipsregs.h>
19
20static inline void unmask_rm7k_irq(struct irq_data *d)
21{
22	set_c0_intcontrol(0x100 << (d->irq - RM7K_CPU_IRQ_BASE));
23}
24
25static inline void mask_rm7k_irq(struct irq_data *d)
26{
27	clear_c0_intcontrol(0x100 << (d->irq - RM7K_CPU_IRQ_BASE));
28}
29
30static struct irq_chip rm7k_irq_controller = {
31	.name = "RM7000",
32	.irq_ack = mask_rm7k_irq,
33	.irq_mask = mask_rm7k_irq,
34	.irq_mask_ack = mask_rm7k_irq,
35	.irq_unmask = unmask_rm7k_irq,
36	.irq_eoi = unmask_rm7k_irq
37};
38
39void __init rm7k_cpu_irq_init(void)
40{
41	int base = RM7K_CPU_IRQ_BASE;
42	int i;
43
44	clear_c0_intcontrol(0x00000f00);		/* Mask all */
45
46	for (i = base; i < base + 4; i++)
47		irq_set_chip_and_handler(i, &rm7k_irq_controller,
48					 handle_percpu_irq);
49}
50