94dee171df
> #define hw_interrupt_type irq_chip > typedef struct irq_chip hw_irq_controller; > #define no_irq_type no_irq_chip > typedef struct irq_desc irq_desc_t; Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
149 lines
3.3 KiB
C
149 lines
3.3 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/kernel.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <asm/irq_cpu.h>
|
|
#include <asm/mipsregs.h>
|
|
#include <asm/system.h>
|
|
|
|
static int irq_base;
|
|
|
|
static inline void unmask_rm9k_irq(unsigned int irq)
|
|
{
|
|
set_c0_intcontrol(0x1000 << (irq - irq_base));
|
|
}
|
|
|
|
static inline void mask_rm9k_irq(unsigned int irq)
|
|
{
|
|
clear_c0_intcontrol(0x1000 << (irq - 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);
|
|
}
|
|
|
|
static void rm9k_cpu_irq_disable(unsigned int irq)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
mask_rm9k_irq(irq);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static unsigned int rm9k_cpu_irq_startup(unsigned int irq)
|
|
{
|
|
rm9k_cpu_irq_enable(irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define rm9k_cpu_irq_shutdown rm9k_cpu_irq_disable
|
|
|
|
/*
|
|
* 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, 0, 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, 0, 1);
|
|
}
|
|
|
|
|
|
/*
|
|
* While we ack the interrupt interrupts are disabled and thus we don't need
|
|
* to deal with concurrency issues. Same for rm9k_cpu_irq_end.
|
|
*/
|
|
static void rm9k_cpu_irq_ack(unsigned int irq)
|
|
{
|
|
mask_rm9k_irq(irq);
|
|
}
|
|
|
|
static void rm9k_cpu_irq_end(unsigned int irq)
|
|
{
|
|
if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
|
|
unmask_rm9k_irq(irq);
|
|
}
|
|
|
|
static struct irq_chip rm9k_irq_controller = {
|
|
.typename = "RM9000",
|
|
.startup = rm9k_cpu_irq_startup,
|
|
.shutdown = rm9k_cpu_irq_shutdown,
|
|
.enable = rm9k_cpu_irq_enable,
|
|
.disable = rm9k_cpu_irq_disable,
|
|
.ack = rm9k_cpu_irq_ack,
|
|
.end = rm9k_cpu_irq_end,
|
|
};
|
|
|
|
static struct irq_chip rm9k_perfcounter_irq = {
|
|
.typename = "RM9000",
|
|
.startup = rm9k_perfcounter_irq_startup,
|
|
.shutdown = rm9k_perfcounter_irq_shutdown,
|
|
.enable = rm9k_cpu_irq_enable,
|
|
.disable = rm9k_cpu_irq_disable,
|
|
.ack = rm9k_cpu_irq_ack,
|
|
.end = rm9k_cpu_irq_end,
|
|
};
|
|
|
|
unsigned int rm9000_perfcount_irq;
|
|
|
|
EXPORT_SYMBOL(rm9000_perfcount_irq);
|
|
|
|
void __init rm9k_cpu_irq_init(int base)
|
|
{
|
|
int i;
|
|
|
|
clear_c0_intcontrol(0x0000f000); /* Mask all */
|
|
|
|
for (i = base; i < base + 4; i++) {
|
|
irq_desc[i].status = IRQ_DISABLED;
|
|
irq_desc[i].action = NULL;
|
|
irq_desc[i].depth = 1;
|
|
irq_desc[i].chip = &rm9k_irq_controller;
|
|
}
|
|
|
|
rm9000_perfcount_irq = base + 1;
|
|
irq_desc[rm9000_perfcount_irq].chip = &rm9k_perfcounter_irq;
|
|
|
|
irq_base = base;
|
|
}
|