linux/arch/mips/kernel/irq-rm7000.c
Thomas Koeller c42d95d6c4 [MIPS] Fix broken rm7000/rm9000 interrupt handling
Properly acknowledge RM7K and RM9K interrupts. Before this, interrupts were
permanently masked after their first occurrence, making them non-functional.

Signed-off-by: Thomas Koeller <thomas.koeller@baslerweb.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-02-19 17:01:31 +00:00

50 lines
1.2 KiB
C

/*
* Copyright (C) 2003 Ralf Baechle
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* Handler for RM7000 extended interrupts. These are a non-standard
* feature so we handle them separately from standard interrupts.
*/
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <asm/irq_cpu.h>
#include <asm/mipsregs.h>
#include <asm/system.h>
static inline void unmask_rm7k_irq(unsigned int irq)
{
set_c0_intcontrol(0x100 << (irq - RM7K_CPU_IRQ_BASE));
}
static inline void mask_rm7k_irq(unsigned int irq)
{
clear_c0_intcontrol(0x100 << (irq - RM7K_CPU_IRQ_BASE));
}
static struct irq_chip rm7k_irq_controller = {
.name = "RM7000",
.ack = mask_rm7k_irq,
.mask = mask_rm7k_irq,
.mask_ack = mask_rm7k_irq,
.unmask = unmask_rm7k_irq,
.eoi = unmask_rm7k_irq
};
void __init rm7k_cpu_irq_init(void)
{
int base = RM7K_CPU_IRQ_BASE;
int i;
clear_c0_intcontrol(0x00000f00); /* Mask all */
for (i = base; i < base + 4; i++)
set_irq_chip_and_handler(i, &rm7k_irq_controller,
handle_percpu_irq);
}