projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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 | ||
| 1da177e4 LT |
43 | static inline unsigned int ffz8(unsigned int word) |
| 44 | { | |
| 45 | unsigned long k; | |
| 46 | ||
| 47 | k = 7; | |
| 48 | if (word & 0x0fUL) { k -= 4; word <<= 4; } | |
| 49 | if (word & 0x30UL) { k -= 2; word <<= 2; } | |
| 50 | if (word & 0x40UL) { k -= 1; } | |
| 51 | ||
| 52 | return k; | |
| 53 | } | |
| 54 | ||
| e4ac58af RB |
55 | extern void mips_timer_interrupt(struct pt_regs *regs); |
| 56 | ||
| 67cbeb33 | 57 | asmlinkage void ev96100_cpu_irq(unsigned int pending, struct pt_regs *regs) |
| 1da177e4 LT |
58 | { |
| 59 | do_IRQ(ffz8(pending >> 8), regs); | |
| 60 | } | |
| 61 | ||
| e4ac58af RB |
62 | asmlinkage void plat_irq_dispatch(struct pt_regs *regs) |
| 63 | { | |
| 64 | unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM; | |
| 65 | ||
| 66 | if (pending & CAUSEF_IP7) | |
| 67 | mips_timer_interrupt(regs); | |
| 68 | else if (pending) | |
| 69 | ev96100_cpu_irq(pending, regs); | |
| 70 | else | |
| 71 | spurious_interrupt(regs); | |
| 72 | } | |
| 73 | ||
| 1da177e4 LT |
74 | void __init arch_init_irq(void) |
| 75 | { | |
| 1da177e4 LT |
76 | mips_cpu_irq_init(0); |
| 77 | } |