You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
109 lines
2.5 KiB
109 lines
2.5 KiB
/*
|
|
* 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 RM9000 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 <linux/module.h>
|
|
|
|
#include <asm/irq_cpu.h>
|
|
#include <asm/mipsregs.h>
|
|
#include <asm/system.h>
|
|
|
|
static inline void unmask_rm9k_irq(unsigned int irq)
|
|
{
|
|
set_c0_intcontrol(0x1000 << (irq - RM9K_CPU_IRQ_BASE));
|
|
}
|
|
|
|
static inline void mask_rm9k_irq(unsigned int irq)
|
|
{
|
|
clear_c0_intcontrol(0x1000 << (irq - RM9K_CPU_IRQ_BASE));
|
|
}
|
|
|
|
static inline void rm9k_cpu_irq_enable(unsigned int irq)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
unmask_rm9k_irq(irq);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
/*
|
|
* Performance counter interrupts are global on all processors.
|
|
*/
|
|
static void local_rm9k_perfcounter_irq_startup(void *args)
|
|
{
|
|
unsigned int irq = (unsigned int) args;
|
|
|
|
rm9k_cpu_irq_enable(irq);
|
|
}
|
|
|
|
static unsigned int rm9k_perfcounter_irq_startup(unsigned int irq)
|
|
{
|
|
on_each_cpu(local_rm9k_perfcounter_irq_startup, (void *) irq, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void local_rm9k_perfcounter_irq_shutdown(void *args)
|
|
{
|
|
unsigned int irq = (unsigned int) args;
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
mask_rm9k_irq(irq);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static void rm9k_perfcounter_irq_shutdown(unsigned int irq)
|
|
{
|
|
on_each_cpu(local_rm9k_perfcounter_irq_shutdown, (void *) irq, 1);
|
|
}
|
|
|
|
static struct irq_chip rm9k_irq_controller = {
|
|
.name = "RM9000",
|
|
.ack = mask_rm9k_irq,
|
|
.mask = mask_rm9k_irq,
|
|
.mask_ack = mask_rm9k_irq,
|
|
.unmask = unmask_rm9k_irq,
|
|
.eoi = unmask_rm9k_irq
|
|
};
|
|
|
|
static struct irq_chip rm9k_perfcounter_irq = {
|
|
.name = "RM9000",
|
|
.startup = rm9k_perfcounter_irq_startup,
|
|
.shutdown = rm9k_perfcounter_irq_shutdown,
|
|
.ack = mask_rm9k_irq,
|
|
.mask = mask_rm9k_irq,
|
|
.mask_ack = mask_rm9k_irq,
|
|
.unmask = unmask_rm9k_irq,
|
|
};
|
|
|
|
unsigned int rm9000_perfcount_irq;
|
|
|
|
EXPORT_SYMBOL(rm9000_perfcount_irq);
|
|
|
|
void __init rm9k_cpu_irq_init(void)
|
|
{
|
|
int base = RM9K_CPU_IRQ_BASE;
|
|
int i;
|
|
|
|
clear_c0_intcontrol(0x0000f000); /* Mask all */
|
|
|
|
for (i = base; i < base + 4; i++)
|
|
set_irq_chip_and_handler(i, &rm9k_irq_controller,
|
|
handle_level_irq);
|
|
|
|
rm9000_perfcount_irq = base + 1;
|
|
set_irq_chip_and_handler(rm9000_perfcount_irq, &rm9k_perfcounter_irq,
|
|
handle_percpu_irq);
|
|
}
|
|
|