WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/mips32/src/interrupt.c


/*
 * Copyright (C) 2003-2004 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 <interrupt.h>
#include <arch/interrupt.h>
#include <arch/types.h>
#include <arch.h>
#include <arch/cp0.h>
#include <time/clock.h>
#include <arch/drivers/arc.h>
 
/** Disable interrupts.
 *
 * @return Old interrupt priority level.
 */
ipl_t interrupts_disable(void)
{
    ipl_t ipl = (ipl_t) cp0_status_read();
    cp0_status_write(ipl & ~cp0_status_ie_enabled_bit);
    return ipl;
}
 
/** Enable interrupts.
 *
 * @return Old interrupt priority level.
 */
ipl_t interrupts_enable(void)
{
    ipl_t ipl = (ipl_t) cp0_status_read();
    cp0_status_write(ipl | cp0_status_ie_enabled_bit);
    return ipl;
}
 
/** Restore interrupt priority level.
 *
 * @param ipl Saved interrupt priority level.
 */
void interrupts_restore(ipl_t ipl)
{
    cp0_status_write(cp0_status_read() | (ipl & cp0_status_ie_enabled_bit));
}
 
/** Read interrupt priority level.
 *
 * @return Current interrupt priority level.
 */
ipl_t interrupts_read(void)
{
    return cp0_status_read();
}
 
static void timer_exception(int n, istate_t *istate)
{
    cp0_compare_write(cp0_count_read() + cp0_compare_value);
    clock();
}
 
static void swint0(int n, istate_t *istate)
{
    cp0_cause_write(cp0_cause_read() & ~(1 << 8)); /* clear SW0 interrupt */
}
 
static void swint1(int n, istate_t *istate)
{
    cp0_cause_write(cp0_cause_read() & ~(1 << 9)); /* clear SW1 interrupt */
}
 
/* Initialize basic tables for exception dispatching */
void interrupt_init(void)
{
    int_register(TIMER_IRQ, "timer", timer_exception);
    int_register(0, "swint0", swint0);
    int_register(1, "swint1", swint1);
}
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/mips32/src/interrupt.c – Rev 610 → 958

Rev 610		Rev 958
1	/*	1	/*
2	* Copyright (C) 2003-2004 Jakub Jermar	2	* Copyright (C) 2003-2004 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 <interrupt.h>	29	#include <interrupt.h>
30	#include <arch/interrupt.h>	30	#include <arch/interrupt.h>
31	#include <arch/types.h>	31	#include <arch/types.h>
32	#include <arch.h>	32	#include <arch.h>
33	#include <arch/cp0.h>	33	#include <arch/cp0.h>
34	#include <time/clock.h>	34	#include <time/clock.h>
35	#include <arch/drivers/arc.h>	35	#include <arch/drivers/arc.h>
36		36
37	/** Disable interrupts.	37	/** Disable interrupts.
38	*	38	*
39	* @return Old interrupt priority level.	39	* @return Old interrupt priority level.
40	*/	40	*/
41	ipl_t interrupts_disable(void)	41	ipl_t interrupts_disable(void)
42	{	42	{
43	ipl_t ipl = (ipl_t) cp0_status_read();	43	ipl_t ipl = (ipl_t) cp0_status_read();
44	cp0_status_write(ipl & ~cp0_status_ie_enabled_bit);	44	cp0_status_write(ipl & ~cp0_status_ie_enabled_bit);
45	return ipl;	45	return ipl;
46	}	46	}
47		47
48	/** Enable interrupts.	48	/** Enable interrupts.
49	*	49	*
50	* @return Old interrupt priority level.	50	* @return Old interrupt priority level.
51	*/	51	*/
52	ipl_t interrupts_enable(void)	52	ipl_t interrupts_enable(void)
53	{	53	{
54	ipl_t ipl = (ipl_t) cp0_status_read();	54	ipl_t ipl = (ipl_t) cp0_status_read();
55	cp0_status_write(ipl \| cp0_status_ie_enabled_bit);	55	cp0_status_write(ipl \| cp0_status_ie_enabled_bit);
56	return ipl;	56	return ipl;
57	}	57	}
58		58
59	/** Restore interrupt priority level.	59	/** Restore interrupt priority level.
60	*	60	*
61	* @param ipl Saved interrupt priority level.	61	* @param ipl Saved interrupt priority level.
62	*/	62	*/
63	void interrupts_restore(ipl_t ipl)	63	void interrupts_restore(ipl_t ipl)
64	{	64	{
65	cp0_status_write(cp0_status_read() \| (ipl & cp0_status_ie_enabled_bit));	65	cp0_status_write(cp0_status_read() \| (ipl & cp0_status_ie_enabled_bit));
66	}	66	}
67		67
68	/** Read interrupt priority level.	68	/** Read interrupt priority level.
69	*	69	*
70	* @return Current interrupt priority level.	70	* @return Current interrupt priority level.
71	*/	71	*/
72	ipl_t interrupts_read(void)	72	ipl_t interrupts_read(void)
73	{	73	{
74	return cp0_status_read();	74	return cp0_status_read();
75	}	75	}
76		76
77	static void timer_exception(int n, void *stack)	77	static void timer_exception(int n, istate_t *istate)
78	{	78	{
79	cp0_compare_write(cp0_count_read() + cp0_compare_value);	79	cp0_compare_write(cp0_count_read() + cp0_compare_value);
80	clock();	80	clock();
81	}	81	}
82		82
83	static void swint0(int n, void *stack)	83	static void swint0(int n, istate_t *istate)
84	{	84	{
85	cp0_cause_write(cp0_cause_read() & ~(1 << 8)); /* clear SW0 interrupt */	85	cp0_cause_write(cp0_cause_read() & ~(1 << 8)); /* clear SW0 interrupt */
86	}	86	}
87		87
88	static void swint1(int n, void *stack)	88	static void swint1(int n, istate_t *istate)
89	{	89	{
90	cp0_cause_write(cp0_cause_read() & ~(1 << 9)); /* clear SW1 interrupt */	90	cp0_cause_write(cp0_cause_read() & ~(1 << 9)); /* clear SW1 interrupt */
91	}	91	}
92		92
93	/* Initialize basic tables for exception dispatching */	93	/* Initialize basic tables for exception dispatching */
94	void interrupt_init(void)	94	void interrupt_init(void)
95	{	95	{
96	int_register(TIMER_IRQ, "timer", timer_exception);	96	int_register(TIMER_IRQ, "timer", timer_exception);
97	int_register(0, "swint0", swint0);	97	int_register(0, "swint0", swint0);
98	int_register(1, "swint1", swint1);	98	int_register(1, "swint1", swint1);
99	}	99	}
100		100