2 * Copyright (C) 2002 Momentum Computer, Inc.
3 * Author: Matthew Dharm, mdharm@momenco.com
6 * Copyright (C) 2000 RidgeRun, Inc.
7 * Author: RidgeRun, Inc.
8 * glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com
10 * Copyright 2001 MontaVista Software Inc.
11 * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
13 * Copyright (C) 2000, 01, 06 Ralf Baechle (ralf@linux-mips.org)
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the
17 * Free Software Foundation; either version 2 of the License, or (at your
18 * option) any later version.
20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
21 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
23 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
26 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
27 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 * You should have received a copy of the GNU General Public License along
32 * with this program; if not, write to the Free Software Foundation, Inc.,
33 * 675 Mass Ave, Cambridge, MA 02139, USA.
35 #include <linux/init.h>
36 #include <linux/interrupt.h>
37 #include <linux/signal.h>
38 #include <linux/types.h>
39 #include <asm/irq_cpu.h>
40 #include <asm/mipsregs.h>
43 asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
45 unsigned int pending = read_c0_cause() & read_c0_status();
47 if (pending & STATUSF_IP0)
49 else if (pending & STATUSF_IP1)
51 else if (pending & STATUSF_IP2)
53 else if (pending & STATUSF_IP3)
55 else if (pending & STATUSF_IP4)
57 else if (pending & STATUSF_IP5)
59 else if (pending & STATUSF_IP6)
61 else if (pending & STATUSF_IP7)
62 ll_timer_interrupt(7, regs);
65 * Now look at the extended interrupts
67 pending = (read_c0_cause() & (read_c0_intcontrol() << 8)) >> 16;
68 if (pending & STATUSF_IP8)
73 static struct irqaction cascade_mv64340 = {
74 no_action, IRQF_DISABLED, CPU_MASK_NONE, "MV64340-Cascade", NULL, NULL
77 void __init arch_init_irq(void)
80 * Clear all of the interrupts while we change the able around a bit.
81 * int-handler is not on bootstrap
83 clear_c0_status(ST0_IM);
88 /* set up the cascading interrupts */
89 setup_irq(8, &cascade_mv64340);
93 set_c0_status(ST0_IM);