WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/sparc64/src/drivers/tick.c


/*
 * 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();
}
 

Rev 665	Rev 958
1	/*	1	/*
2	* Copyright (C) 2005 Jakub Jermar	2	* Copyright (C) 2005 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	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	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.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	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	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	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	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	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	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.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	#include <arch/drivers/tick.h>	29	#include <arch/drivers/tick.h>
30	#include <arch/interrupt.h>	30	#include <arch/interrupt.h>
31	#include <arch/asm.h>	31	#include <arch/asm.h>
32	#include <arch/register.h>	32	#include <arch/register.h>
33	#include <debug.h>	33	#include <debug.h>
34	#include <time/clock.h>	34	#include <time/clock.h>
-		35	#include <typedefs.h>
35		36
36	/** Initialize tick interrupt. */	37	/** Initialize tick interrupt. */
37	void tick_init(void)	38	void tick_init(void)
38	{	39	{
39	tick_compare_reg_t compare;	40	tick_compare_reg_t compare;
40		41
41	interrupt_register(14, "tick_int", tick_interrupt);	42	interrupt_register(14, "tick_int", tick_interrupt);
42	compare.int_dis = false;	43	compare.int_dis = false;
43	compare.tick_cmpr = TICK_DELTA;	44	compare.tick_cmpr = TICK_DELTA;
44	tick_compare_write(compare.value);	45	tick_compare_write(compare.value);
45	tick_write(0);	46	tick_write(0);
46	}	47	}
47		48
48	/** Process tick interrupt.	49	/** Process tick interrupt.
49	*	50	*
50	* @param n Interrupt Level, 14, (can be ignored)	51	* @param n Interrupt Level, 14, (can be ignored)
51	* @param stack Stack pointer of the interrupted context.	52	* @param istate Interrupted state.
52	*/	53	*/
53	void tick_interrupt(int n, void *stack)	54	void tick_interrupt(int n, istate_t *istate)
54	{	55	{
55	softint_reg_t softint, clear;	56	softint_reg_t softint, clear;
56		57
57	softint.value = softint_read();	58	softint.value = softint_read();
58		59
59	/*	60	/*
60	* Make sure we are servicing interrupt_level_14	61	* Make sure we are servicing interrupt_level_14
61	*/	62	*/
62	ASSERT(n == 14);	63	ASSERT(n == 14);
63		64
64	/*	65	/*
65	* Make sure we are servicing TICK_INT.	66	* Make sure we are servicing TICK_INT.
66	*/	67	*/
67	ASSERT(softint.tick_int);	68	ASSERT(softint.tick_int);
68		69
69	/*	70	/*
70	* Clear tick interrupt.	71	* Clear tick interrupt.
71	*/	72	*/
72	clear.value = 0;	73	clear.value = 0;
73	clear.tick_int = 1;	74	clear.tick_int = 1;
74	clear_softint_write(clear.value);	75	clear_softint_write(clear.value);
75		76
76	/*	77	/*
77	* Restart counter.	78	* Restart counter.
78	*/	79	*/
79	tick_write(0);	80	tick_write(0);
80		81
81	clock();	82	clock();
82	}	83	}
83		84

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/sparc64/src/drivers/tick.c @ 1702 – Rev 665 → 958