Rev 1004 | Rev 1265 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1004 | decky | 1 | /* |
| 2 | * Copyright (C) 2006 Martin Decky |
||
| 3 | * All rights reserved. |
||
| 4 | * |
||
| 5 | * Redistribution and use in source and binary forms, with or without |
||
| 6 | * modification, are permitted provided that the following conditions |
||
| 7 | * are met: |
||
| 8 | * |
||
| 9 | * - Redistributions of source code must retain the above copyright |
||
| 10 | * notice, this list of conditions and the following disclaimer. |
||
| 11 | * - Redistributions in binary form must reproduce the above copyright |
||
| 12 | * notice, this list of conditions and the following disclaimer in the |
||
| 13 | * documentation and/or other materials provided with the distribution. |
||
| 14 | * - The name of the author may not be used to endorse or promote products |
||
| 15 | * derived from this software without specific prior written permission. |
||
| 16 | * |
||
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
||
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 20 | * IN 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 USE, |
||
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||
| 24 | * 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 | |||
| 29 | #include <interrupt.h> |
||
| 30 | #include <arch/interrupt.h> |
||
| 31 | #include <arch/types.h> |
||
| 32 | #include <arch.h> |
||
| 33 | #include <time/clock.h> |
||
| 34 | #include <print.h> |
||
| 35 | |||
| 1007 | decky | 36 | |
| 37 | void start_decrementer(void) |
||
| 38 | { |
||
| 39 | asm volatile ( |
||
| 40 | "mtdec %0\n" |
||
| 41 | :: "r" (1000) |
||
| 42 | ); |
||
| 43 | } |
||
| 44 | |||
| 45 | |||
| 1004 | decky | 46 | static void exception_decrementer(int n, istate_t *istate) |
| 47 | { |
||
| 48 | clock(); |
||
| 1007 | decky | 49 | start_decrementer(); |
| 1004 | decky | 50 | } |
| 51 | |||
| 52 | |||
| 53 | /* Initialize basic tables for exception dispatching */ |
||
| 54 | void interrupt_init(void) |
||
| 55 | { |
||
| 56 | exc_register(VECTOR_DECREMENTER, "timer", exception_decrementer); |
||
| 57 | } |