b81947c646
Disintegrate asm/system.h for MIPS. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> cc: linux-mips@linux-mips.org
106 lines
2.5 KiB
C
106 lines
2.5 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 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/irq.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <asm/irq_cpu.h>
|
|
#include <asm/mipsregs.h>
|
|
|
|
static inline void unmask_rm9k_irq(struct irq_data *d)
|
|
{
|
|
set_c0_intcontrol(0x1000 << (d->irq - RM9K_CPU_IRQ_BASE));
|
|
}
|
|
|
|
static inline void mask_rm9k_irq(struct irq_data *d)
|
|
{
|
|
clear_c0_intcontrol(0x1000 << (d->irq - RM9K_CPU_IRQ_BASE));
|
|
}
|
|
|
|
static inline void rm9k_cpu_irq_enable(struct irq_data *d)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
unmask_rm9k_irq(d);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
/*
|
|
* Performance counter interrupts are global on all processors.
|
|
*/
|
|
static void local_rm9k_perfcounter_irq_startup(void *args)
|
|
{
|
|
rm9k_cpu_irq_enable(args);
|
|
}
|
|
|
|
static unsigned int rm9k_perfcounter_irq_startup(struct irq_data *d)
|
|
{
|
|
on_each_cpu(local_rm9k_perfcounter_irq_startup, d, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void local_rm9k_perfcounter_irq_shutdown(void *args)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
mask_rm9k_irq(args);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static void rm9k_perfcounter_irq_shutdown(struct irq_data *d)
|
|
{
|
|
on_each_cpu(local_rm9k_perfcounter_irq_shutdown, d, 1);
|
|
}
|
|
|
|
static struct irq_chip rm9k_irq_controller = {
|
|
.name = "RM9000",
|
|
.irq_ack = mask_rm9k_irq,
|
|
.irq_mask = mask_rm9k_irq,
|
|
.irq_mask_ack = mask_rm9k_irq,
|
|
.irq_unmask = unmask_rm9k_irq,
|
|
.irq_eoi = unmask_rm9k_irq
|
|
};
|
|
|
|
static struct irq_chip rm9k_perfcounter_irq = {
|
|
.name = "RM9000",
|
|
.irq_startup = rm9k_perfcounter_irq_startup,
|
|
.irq_shutdown = rm9k_perfcounter_irq_shutdown,
|
|
.irq_ack = mask_rm9k_irq,
|
|
.irq_mask = mask_rm9k_irq,
|
|
.irq_mask_ack = mask_rm9k_irq,
|
|
.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++)
|
|
irq_set_chip_and_handler(i, &rm9k_irq_controller,
|
|
handle_level_irq);
|
|
|
|
rm9000_perfcount_irq = base + 1;
|
|
irq_set_chip_and_handler(rm9000_perfcount_irq, &rm9k_perfcounter_irq,
|
|
handle_percpu_irq);
|
|
}
|