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/*
* Copyright (C) 2000 RidgeRun, Inc.
* Author: RidgeRun, Inc.
* glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com
*
* Copyright 2001 MontaVista Software Inc.
* Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
* Copyright (C) 2000, 2001 Ralf Baechle (ralf@gnu.org)
*
* Copyright 2004 PMC-Sierra
* Author: Manish Lachwani (lachwani@pmc-sierra.com)
*
* 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.
*
* Copyright (C) 2004 MontaVista Software Inc.
* Author: Manish Lachwani, mlachwani@mvista.com
*
*/
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/kernel_stat.h>
#include <linux/module.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/timex.h>
#include <linux/slab.h>
#include <linux/random.h>
#include <asm/bitops.h>
#include <asm/bootinfo.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/mipsregs.h>
#include <asm/system.h>
static struct irqaction cascade_mv64340 = {
no_action, SA_INTERRUPT, CPU_MASK_NONE, "MV64340-Cascade", NULL, NULL
};
void __init arch_init_irq(void)
{
/*
* Clear all of the interrupts while we change the able around a bit.
* int-handler is not on bootstrap
*/
clear_c0_status(ST0_IM | ST0_BEV);
rm7k_cpu_irq_init(8);
/* set up the cascading interrupts */
setup_irq(8, &cascade_mv64340); /* unmask intControl IM8, IRQ 9 */
mv64340_irq_init(16);
set_c0_status(ST0_IM); /* IE in the status register */
}
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned int pending = read_c0_cause() & read_c0_status();
if (pending & STATUSF_IP0)
do_IRQ(0, regs);
else if (pending & STATUSF_IP1)
do_IRQ(1, regs);
else if (pending & STATUSF_IP2)
do_IRQ(2, regs);
else if (pending & STATUSF_IP3)
do_IRQ(3, regs);
else if (pending & STATUSF_IP4)
do_IRQ(4, regs);
else if (pending & STATUSF_IP5)
do_IRQ(5, regs);
else if (pending & STATUSF_IP6)
do_IRQ(6, regs);
else if (pending & STATUSF_IP7)
do_IRQ(7, regs);
else {
/*
* Now look at the extended interrupts
*/
pending = (read_c0_cause() & (read_c0_intcontrol() << 8)) >> 16;
if (pending & STATUSF_IP8)
ll_mv64340_irq(regs);
else
spurious_interrupt(regs);
}
}
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