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/*
* Copyright 2000 MontaVista Software Inc.
* Author: MontaVista Software, Inc.
* ppopov@mvista.com or source@mvista.com
*
* This file was derived from Carsten Langgaard's
* arch/mips/mips-boards/atlas/atlas_int.c.
*
* Carsten Langgaard, carstenl@mips.com
* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/kernel_stat.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <asm/irq_cpu.h>
static inline unsigned int ffz8(unsigned int word)
{
unsigned long k;
k = 7;
if (word & 0x0fUL) { k -= 4; word <<= 4; }
if (word & 0x30UL) { k -= 2; word <<= 2; }
if (word & 0x40UL) { k -= 1; }
return k;
}
extern void mips_timer_interrupt(struct pt_regs *regs);
asmlinkage void ev96100_cpu_irq(unsigned int pending, struct pt_regs *regs)
{
do_IRQ(ffz8(pending >> 8), regs);
}
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
if (pending & CAUSEF_IP7)
mips_timer_interrupt(regs);
else if (pending)
ev96100_cpu_irq(pending, regs);
else
spurious_interrupt(regs);
}
void __init arch_init_irq(void)
{
mips_cpu_irq_init(0);
}
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