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Thomas Gleixner2874c5f2019-05-27 08:55:01 +02001// SPDX-License-Identifier: GPL-2.0-or-later
Linus Torvalds1da177e2005-04-16 15:20:36 -07002/*
3 * Copyright (C) 2003 Ralf Baechle
4 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * Handler for RM7000 extended interrupts. These are a non-standard
6 * feature so we handle them separately from standard interrupts.
7 */
8#include <linux/init.h>
9#include <linux/interrupt.h>
David Howellsca4d3e672010-10-07 14:08:54 +010010#include <linux/irq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#include <linux/kernel.h>
12
13#include <asm/irq_cpu.h>
14#include <asm/mipsregs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015
Thomas Gleixnere0598522011-03-23 21:09:00 +000016static inline void unmask_rm7k_irq(struct irq_data *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -070017{
Thomas Gleixnere0598522011-03-23 21:09:00 +000018 set_c0_intcontrol(0x100 << (d->irq - RM7K_CPU_IRQ_BASE));
Linus Torvalds1da177e2005-04-16 15:20:36 -070019}
20
Thomas Gleixnere0598522011-03-23 21:09:00 +000021static inline void mask_rm7k_irq(struct irq_data *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -070022{
Thomas Gleixnere0598522011-03-23 21:09:00 +000023 clear_c0_intcontrol(0x100 << (d->irq - RM7K_CPU_IRQ_BASE));
Linus Torvalds1da177e2005-04-16 15:20:36 -070024}
25
Ralf Baechle94dee172006-07-02 14:41:42 +010026static struct irq_chip rm7k_irq_controller = {
Atsushi Nemoto70d21cd2007-01-15 00:07:25 +090027 .name = "RM7000",
Thomas Gleixnere0598522011-03-23 21:09:00 +000028 .irq_ack = mask_rm7k_irq,
29 .irq_mask = mask_rm7k_irq,
30 .irq_mask_ack = mask_rm7k_irq,
31 .irq_unmask = unmask_rm7k_irq,
32 .irq_eoi = unmask_rm7k_irq
Linus Torvalds1da177e2005-04-16 15:20:36 -070033};
34
Atsushi Nemoto97dcb822007-01-08 02:14:29 +090035void __init rm7k_cpu_irq_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070036{
Atsushi Nemoto97dcb822007-01-08 02:14:29 +090037 int base = RM7K_CPU_IRQ_BASE;
Linus Torvalds1da177e2005-04-16 15:20:36 -070038 int i;
39
40 clear_c0_intcontrol(0x00000f00); /* Mask all */
41
Atsushi Nemoto1603b5a2006-11-02 02:08:36 +090042 for (i = base; i < base + 4; i++)
Thomas Gleixnere4ec7982011-03-27 15:19:28 +020043 irq_set_chip_and_handler(i, &rm7k_irq_controller,
Ralf Baechle30e748a2007-11-15 19:37:15 +000044 handle_percpu_irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -070045}