1603b5aca4
This is a big irq cleanup patch. * Use set_irq_chip() to register irq_chip. * Initialize .mask, .unmask, .mask_ack field. Functions for these method are already exist in most case. * Do not initialize .startup, .shutdown, .enable, .disable fields if default routines provided by irq_chip_set_defaults() were suitable. * Remove redundant irq_desc initializations. * Remove unnecessary local_irq_save/local_irq_restore, spin_lock. With this cleanup, it would be easy to switch to slightly lightwait irq flow handlers (handle_level_irq(), etc.) instead of __do_IRQ(). Though whole this patch is quite large, changes in each irq_chip are not quite simple. Please review and test on your platform. Thanks. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
58 lines
1.3 KiB
C
58 lines
1.3 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 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(i, &rm7k_irq_controller);
|
|
|
|
irq_base = base;
|
|
}
|