| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2000 MontaVista Software Inc. |
| 3 | * Author: MontaVista Software, Inc. |
| 4 | * ppopov@mvista.com or source@mvista.com |
| 5 | * |
| 6 | * This file was derived from Carsten Langgaard's |
| 7 | * arch/mips/mips-boards/atlas/atlas_int.c. |
| 8 | * |
| 9 | * Carsten Langgaard, carstenl@mips.com |
| 10 | * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved. |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify it |
| 13 | * under the terms of the GNU General Public License as published by the |
| 14 | * Free Software Foundation; either version 2 of the License, or (at your |
| 15 | * option) any later version. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 18 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 19 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
| 20 | * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| 23 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| 24 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | * |
| 28 | * You should have received a copy of the GNU General Public License along |
| 29 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 30 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 31 | */ |
| 32 | #include <linux/errno.h> |
| 33 | #include <linux/init.h> |
| 34 | #include <linux/kernel_stat.h> |
| 35 | #include <linux/irq.h> |
| 36 | #include <linux/module.h> |
| 37 | #include <linux/signal.h> |
| 38 | #include <linux/sched.h> |
| 39 | #include <linux/types.h> |
| 40 | #include <linux/interrupt.h> |
| 41 | #include <asm/irq_cpu.h> |
| 42 | |
| 43 | extern asmlinkage void ev96100IRQ(void); |
| 44 | |
| 45 | static inline unsigned int ffz8(unsigned int word) |
| 46 | { |
| 47 | unsigned long k; |
| 48 | |
| 49 | k = 7; |
| 50 | if (word & 0x0fUL) { k -= 4; word <<= 4; } |
| 51 | if (word & 0x30UL) { k -= 2; word <<= 2; } |
| 52 | if (word & 0x40UL) { k -= 1; } |
| 53 | |
| 54 | return k; |
| 55 | } |
| 56 | |
| 57 | asmlinkage void ev96100_cpu_irq(unsigned int pendin) |
| 58 | { |
| 59 | do_IRQ(ffz8(pending >> 8), regs); |
| 60 | } |
| 61 | |
| 62 | void __init arch_init_irq(void) |
| 63 | { |
| 64 | set_except_vector(0, ev96100IRQ); |
| 65 | mips_cpu_irq_init(0); |
| 66 | } |