67 lines
2.2 KiB
C
67 lines
2.2 KiB
C
|
/*
|
||
|
|
* 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>
|
||
|
|
|
||
|
|
extern asmlinkage void ev96100IRQ(void);
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
asmlinkage void ev96100_cpu_irq(unsigned int pendin)
|
||
|
|
{
|
||
|
|
do_IRQ(ffz8(pending >> 8), regs);
|
||
|
|
}
|
||
|
|
|
||
|
|
void __init arch_init_irq(void)
|
||
|
|
{
|
||
|
|
set_except_vector(0, ev96100IRQ);
|
||
|
|
mips_cpu_irq_init(0);
|
||
|
|
}
|