WebSVN – HelenOS-historic – Diff – /SPARTAN/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 <arch/interrupt.h>
#include <arch/types.h>
#include <arch.h>
#include <arch/cp0.h>
#include <time/clock.h>
#include <panic.h>
#include <print.h>
#include <symtab.h>
#include <arch/drivers/arc.h>
 
static void print_regdump(struct exception_regdump *pstate)
{
    char *pcsymbol = "";
    char *rasymbol = "";
 
    char *s = get_symtab_entry(pstate->epc);
    if (s)
        pcsymbol = s;
    s = get_symtab_entry(pstate->ra);
    if (s)
        rasymbol = s;
   
    printf("PC: %X(%s) RA: %X(%s)\n",pstate->epc,pcsymbol,
           pstate->ra,rasymbol);
}
 
/** 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();
}
 
void interrupt(struct exception_regdump *pstate)
{
    __u32 cause;
    int i;
   
    /* decode interrupt number and process the interrupt */
    cause = (cp0_cause_read() >> 8) &0xff;
   
    for (i = 0; i < 8; i++) {
        if (cause & (1 << i)) {
            switch (i) {
                case 0: /* SW0 - Software interrupt 0 */
                    cp0_cause_write(cp0_cause_read() & ~(1 << 8)); /* clear SW0 interrupt */
                    break;
                case 1: /* SW1 - Software interrupt 1 */
                    cp0_cause_write(cp0_cause_read() & ~(1 << 9)); /* clear SW1 interrupt */
                    break;
                case 2: /* IRQ0 */
                case 3: /* IRQ1 */
                case 4: /* IRQ2 */
                case 5: /* IRQ3 */
                case 6: /* IRQ4 */
                default:
                    print_regdump(pstate);
                    panic("unhandled interrupt %d\n", i);
                    break;
                case TIMER_INTERRUPT:
                    /* clear timer interrupt & set new */
                    cp0_compare_write(cp0_count_read() + cp0_compare_value);
                    clock();
                    break;
            }
        }
    }
 
}
 

Rev 413	Rev 483
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 <arch/interrupt.h>	29	#include <arch/interrupt.h>
30	#include <arch/types.h>	30	#include <arch/types.h>
31	#include <arch.h>	31	#include <arch.h>
32	#include <arch/cp0.h>	32	#include <arch/cp0.h>
33	#include <time/clock.h>	33	#include <time/clock.h>
34	#include <panic.h>	34	#include <panic.h>
35	#include <print.h>	35	#include <print.h>
36	#include <symtab.h>	36	#include <symtab.h>
37	#include <arch/drivers/arc.h>	37	#include <arch/drivers/arc.h>
38		38
39	static void print_regdump(struct exception_regdump *pstate)	39	static void print_regdump(struct exception_regdump *pstate)
40	{	40	{
41	char *pcsymbol = "";	41	char *pcsymbol = "";
42	char *rasymbol = "";	42	char *rasymbol = "";
43		43
44	char *s = get_symtab_entry(pstate->epc);	44	char *s = get_symtab_entry(pstate->epc);
45	if (s)	45	if (s)
46	pcsymbol = s;	46	pcsymbol = s;
47	s = get_symtab_entry(pstate->ra);	47	s = get_symtab_entry(pstate->ra);
48	if (s)	48	if (s)
49	rasymbol = s;	49	rasymbol = s;
50		50
51	printf("PC: %X(%s) RA: %X(%s)\n",pstate->epc,pcsymbol,	51	printf("PC: %X(%s) RA: %X(%s)\n",pstate->epc,pcsymbol,
52	pstate->ra,rasymbol);	52	pstate->ra,rasymbol);
53	}	53	}
54		54
55	/** Disable interrupts.	55	/** Disable interrupts.
56	*	56	*
57	* @return Old interrupt priority level.	57	* @return Old interrupt priority level.
58	*/	58	*/
59	ipl_t interrupts_disable(void)	59	ipl_t interrupts_disable(void)
60	{	60	{
61	ipl_t ipl = (ipl_t) cp0_status_read();	61	ipl_t ipl = (ipl_t) cp0_status_read();
62	cp0_status_write(ipl & ~cp0_status_ie_enabled_bit);	62	cp0_status_write(ipl & ~cp0_status_ie_enabled_bit);
63	return ipl;	63	return ipl;
64	}	64	}
65		65
66	/** Enable interrupts.	66	/** Enable interrupts.
67	*	67	*
68	* @return Old interrupt priority level.	68	* @return Old interrupt priority level.
69	*/	69	*/
70	ipl_t interrupts_enable(void)	70	ipl_t interrupts_enable(void)
71	{	71	{
72	ipl_t ipl = (ipl_t) cp0_status_read();	72	ipl_t ipl = (ipl_t) cp0_status_read();
73	cp0_status_write(ipl \| cp0_status_ie_enabled_bit);	73	cp0_status_write(ipl \| cp0_status_ie_enabled_bit);
74	return ipl;	74	return ipl;
75	}	75	}
76		76
77	/** Restore interrupt priority level.	77	/** Restore interrupt priority level.
78	*	78	*
79	* @param ipl Saved interrupt priority level.	79	* @param ipl Saved interrupt priority level.
80	*/	80	*/
81	void interrupts_restore(ipl_t ipl)	81	void interrupts_restore(ipl_t ipl)
82	{	82	{
83	cp0_status_write(cp0_status_read() \| (ipl & cp0_status_ie_enabled_bit));	83	cp0_status_write(cp0_status_read() \| (ipl & cp0_status_ie_enabled_bit));
84	}	84	}
85		85
86	/** Read interrupt priority level.	86	/** Read interrupt priority level.
87	*	87	*
88	* @return Current interrupt priority level.	88	* @return Current interrupt priority level.
89	*/	89	*/
90	ipl_t interrupts_read(void)	90	ipl_t interrupts_read(void)
91	{	91	{
92	return cp0_status_read();	92	return cp0_status_read();
93	}	93	}
94		94
95	void interrupt(struct exception_regdump *pstate)	95	void interrupt(struct exception_regdump *pstate)
96	{	96	{
97	__u32 cause;	97	__u32 cause;
98	int i;	98	int i;
99		99
100	/* decode interrupt number and process the interrupt */	100	/* decode interrupt number and process the interrupt */
101	cause = (cp0_cause_read() >> 8) &0xff;	101	cause = (cp0_cause_read() >> 8) &0xff;
102		102
103	for (i = 0; i < 8; i++) {	103	for (i = 0; i < 8; i++) {
104	if (cause & (1 << i)) {	104	if (cause & (1 << i)) {
105	switch (i) {	105	switch (i) {
106	case 0: /* SW0 - Software interrupt 0 */	106	case 0: /* SW0 - Software interrupt 0 */
107	cp0_cause_write(cp0_cause_read() & ~(1 << 8)); /* clear SW0 interrupt */	107	cp0_cause_write(cp0_cause_read() & ~(1 << 8)); /* clear SW0 interrupt */
108	break;	108	break;
109	case 1: /* SW1 - Software interrupt 1 */	109	case 1: /* SW1 - Software interrupt 1 */
110	cp0_cause_write(cp0_cause_read() & ~(1 << 9)); /* clear SW1 interrupt */	110	cp0_cause_write(cp0_cause_read() & ~(1 << 9)); /* clear SW1 interrupt */
111	break;	111	break;
112	case 2: /* IRQ0 */	112	case 2: /* IRQ0 */
113	case 3: /* IRQ1 */	113	case 3: /* IRQ1 */
114	case 4: /* IRQ2 */	114	case 4: /* IRQ2 */
115	case 5: /* IRQ3 */	115	case 5: /* IRQ3 */
116	case 6: /* IRQ4 */	116	case 6: /* IRQ4 */
-		117	default:
117	print_regdump(pstate);	118	print_regdump(pstate);
118	panic("unhandled interrupt %d\n", i);	119	panic("unhandled interrupt %d\n", i);
119	break;	120	break;
120	case TIMER_INTERRUPT:	121	case TIMER_INTERRUPT:
121	/* clear timer interrupt & set new */	122	/* clear timer interrupt & set new */
122	cp0_compare_write(cp0_count_read() + cp0_compare_value);	123	cp0_compare_write(cp0_count_read() + cp0_compare_value);
123	clock();	124	clock();
124	break;	125	break;
125	}	126	}
126	}	127	}
127	}	128	}
128		129
129	}	130	}
130		131

Subversion Repositories HelenOS-historic

(root)/SPARTAN/trunk/arch/mips32/src/interrupt.c – Rev 413 → 483