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/kernel.h>
15
16#include <asm/irq_cpu.h>
17#include <asm/mipsregs.h>
18#include <asm/system.h>
19
20static inline void unmask_rm7k_irq(unsigned int irq)
21{
22	set_c0_intcontrol(0x100 << (irq - RM7K_CPU_IRQ_BASE));
23}
24
25static inline void mask_rm7k_irq(unsigned int irq)
26{
27	clear_c0_intcontrol(0x100 << (irq - RM7K_CPU_IRQ_BASE));
28}
29
30static struct irq_chip rm7k_irq_controller = {
31	.name = "RM7000",
32	.ack = mask_rm7k_irq,
33	.mask = mask_rm7k_irq,
34	.mask_ack = mask_rm7k_irq,
35	.unmask = unmask_rm7k_irq,
36};
37
38void __init rm7k_cpu_irq_init(void)
39{
40	int base = RM7K_CPU_IRQ_BASE;
41	int i;
42
43	clear_c0_intcontrol(0x00000f00);		/* Mask all */
44
45	for (i = base; i < base + 4; i++)
46		set_irq_chip_and_handler(i, &rm7k_irq_controller,
47					 handle_level_irq);
48}
49