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/*
* 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 int irq_base;
static inline void unmask_rm7k_irq(unsigned int irq)
{
set_c0_intcontrol(0x100 << (irq - irq_base));
}
static inline void mask_rm7k_irq(unsigned int irq)
{
clear_c0_intcontrol(0x100 << (irq - irq_base));
}
static void rm7k_cpu_irq_end(unsigned int irq)
{
if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
unmask_rm7k_irq(irq);
}
static struct irq_chip rm7k_irq_controller = {
.typename = "RM7000",
.ack = mask_rm7k_irq,
.mask = mask_rm7k_irq,
.mask_ack = mask_rm7k_irq,
.unmask = unmask_rm7k_irq,
.end = rm7k_cpu_irq_end,
};
void __init rm7k_cpu_irq_init(int 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_level_irq);
irq_base = base;
}
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