0,0 → 1,83 |
/* |
* Copyright (C) 2005 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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. |
*/ |
|
#include <arch/drivers/tick.h> |
#include <arch/interrupt.h> |
#include <arch/asm.h> |
#include <arch/register.h> |
#include <debug.h> |
#include <time/clock.h> |
#include <typedefs.h> |
|
/** Initialize tick interrupt. */ |
void tick_init(void) |
{ |
tick_compare_reg_t compare; |
|
interrupt_register(14, "tick_int", tick_interrupt); |
compare.int_dis = false; |
compare.tick_cmpr = TICK_DELTA; |
tick_compare_write(compare.value); |
tick_write(0); |
} |
|
/** Process tick interrupt. |
* |
* @param n Interrupt Level, 14, (can be ignored) |
* @param istate Interrupted state. |
*/ |
void tick_interrupt(int n, istate_t *istate) |
{ |
softint_reg_t softint, clear; |
|
softint.value = softint_read(); |
|
/* |
* Make sure we are servicing interrupt_level_14 |
*/ |
ASSERT(n == 14); |
|
/* |
* Make sure we are servicing TICK_INT. |
*/ |
ASSERT(softint.tick_int); |
|
/* |
* Clear tick interrupt. |
*/ |
clear.value = 0; |
clear.tick_int = 1; |
clear_softint_write(clear.value); |
|
/* |
* Restart counter. |
*/ |
tick_write(0); |
|
clock(); |
} |