e77c232cfc
__do_IRQ() is needed only by irq handlers that can't use default handlers defined in kernel/irq/chip.c. For others platforms there's no need to compile this function since it won't be used. For those platforms this patch defines GENERIC_HARDIRQS_NO__DO_IRQ symbol which is used exactly for this purpose. Futhermore for platforms which do not use __do_IRQ(), end() method which is part of the 'irq_chip' structure is not used. This patch simply removes this method in this case. Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
52 lines
1.2 KiB
C
52 lines
1.2 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 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,
|
|
};
|
|
|
|
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;
|
|
}
|