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 <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>
#include <arch/drivers/keyboard.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 KEYBOARD_IRQ:
                    keyboard();
                    break;
                case 4: /* IRQ2 */
                case 5: /* IRQ3 */
                case 6: /* IRQ4 */
                default:
                    print_regdump(pstate);
                    panic("unhandled interrupt %d\n", i);
                    break;
                case TIMER_IRQ:
                    /* clear timer interrupt & set new */
                    cp0_compare_write(cp0_count_read() + cp0_compare_value);
                    clock();
                    keyboard_poll();
                    break;
            }
        }
    }
 
}
 

Rev 534	Rev 567
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	#include <arch/drivers/keyboard.h>	38	#include <arch/drivers/keyboard.h>
39		39
40	static void print_regdump(struct exception_regdump *pstate)	40	static void print_regdump(struct exception_regdump *pstate)
41	{	41	{
42	char *pcsymbol = "";	42	char *pcsymbol = "";
43	char *rasymbol = "";	43	char *rasymbol = "";
44		44
45	char *s = get_symtab_entry(pstate->epc);	45	char *s = get_symtab_entry(pstate->epc);
46	if (s)	46	if (s)
47	pcsymbol = s;	47	pcsymbol = s;
48	s = get_symtab_entry(pstate->ra);	48	s = get_symtab_entry(pstate->ra);
49	if (s)	49	if (s)
50	rasymbol = s;	50	rasymbol = s;
51		51
52	printf("PC: %X(%s) RA: %X(%s)\n",pstate->epc,pcsymbol,	52	printf("PC: %X(%s) RA: %X(%s)\n",pstate->epc,pcsymbol,
53	pstate->ra,rasymbol);	53	pstate->ra,rasymbol);
54	}	54	}
55		55
56	/** Disable interrupts.	56	/** Disable interrupts.
57	*	57	*
58	* @return Old interrupt priority level.	58	* @return Old interrupt priority level.
59	*/	59	*/
60	ipl_t interrupts_disable(void)	60	ipl_t interrupts_disable(void)
61	{	61	{
62	ipl_t ipl = (ipl_t) cp0_status_read();	62	ipl_t ipl = (ipl_t) cp0_status_read();
63	cp0_status_write(ipl & ~cp0_status_ie_enabled_bit);	63	cp0_status_write(ipl & ~cp0_status_ie_enabled_bit);
64	return ipl;	64	return ipl;
65	}	65	}
66		66
67	/** Enable interrupts.	67	/** Enable interrupts.
68	*	68	*
69	* @return Old interrupt priority level.	69	* @return Old interrupt priority level.
70	*/	70	*/
71	ipl_t interrupts_enable(void)	71	ipl_t interrupts_enable(void)
72	{	72	{
73	ipl_t ipl = (ipl_t) cp0_status_read();	73	ipl_t ipl = (ipl_t) cp0_status_read();
74	cp0_status_write(ipl \| cp0_status_ie_enabled_bit);	74	cp0_status_write(ipl \| cp0_status_ie_enabled_bit);
75	return ipl;	75	return ipl;
76	}	76	}
77		77
78	/** Restore interrupt priority level.	78	/** Restore interrupt priority level.
79	*	79	*
80	* @param ipl Saved interrupt priority level.	80	* @param ipl Saved interrupt priority level.
81	*/	81	*/
82	void interrupts_restore(ipl_t ipl)	82	void interrupts_restore(ipl_t ipl)
83	{	83	{
84	cp0_status_write(cp0_status_read() \| (ipl & cp0_status_ie_enabled_bit));	84	cp0_status_write(cp0_status_read() \| (ipl & cp0_status_ie_enabled_bit));
85	}	85	}
86		86
87	/** Read interrupt priority level.	87	/** Read interrupt priority level.
88	*	88	*
89	* @return Current interrupt priority level.	89	* @return Current interrupt priority level.
90	*/	90	*/
91	ipl_t interrupts_read(void)	91	ipl_t interrupts_read(void)
92	{	92	{
93	return cp0_status_read();	93	return cp0_status_read();
94	}	94	}
95		95
96	void interrupt(struct exception_regdump *pstate)	96	void interrupt(struct exception_regdump *pstate)
97	{	97	{
98	__u32 cause;	98	__u32 cause;
99	int i;	99	int i;
100		100
101	/* decode interrupt number and process the interrupt */	101	/* decode interrupt number and process the interrupt */
102	cause = (cp0_cause_read() >> 8) &0xff;	102	cause = (cp0_cause_read() >> 8) &0xff;
103		103
104	for (i = 0; i < 8; i++) {	104	for (i = 0; i < 8; i++) {
105	if (cause & (1 << i)) {	105	if (cause & (1 << i)) {
106	switch (i) {	106	switch (i) {
107	case 0: /* SW0 - Software interrupt 0 */	107	case 0: /* SW0 - Software interrupt 0 */
108	cp0_cause_write(cp0_cause_read() & ~(1 << 8)); /* clear SW0 interrupt */	108	cp0_cause_write(cp0_cause_read() & ~(1 << 8)); /* clear SW0 interrupt */
109	break;	109	break;
110	case 1: /* SW1 - Software interrupt 1 */	110	case 1: /* SW1 - Software interrupt 1 */
111	cp0_cause_write(cp0_cause_read() & ~(1 << 9)); /* clear SW1 interrupt */	111	cp0_cause_write(cp0_cause_read() & ~(1 << 9)); /* clear SW1 interrupt */
112	break;	112	break;
113	case 2: /* IRQ0 */	113	case 2: /* IRQ0 */
114	case KEYBOARD_IRQ:	114	case KEYBOARD_IRQ:
115	keyboard();	115	keyboard();
116	break;	116	break;
117	case 4: /* IRQ2 */	117	case 4: /* IRQ2 */
118	case 5: /* IRQ3 */	118	case 5: /* IRQ3 */
119	case 6: /* IRQ4 */	119	case 6: /* IRQ4 */
120	default:	120	default:
121	print_regdump(pstate);	121	print_regdump(pstate);
122	panic("unhandled interrupt %d\n", i);	122	panic("unhandled interrupt %d\n", i);
123	break;	123	break;
124	case TIMER_IRQ:	124	case TIMER_IRQ:
125	/* clear timer interrupt & set new */	125	/* clear timer interrupt & set new */
126	cp0_compare_write(cp0_count_read() + cp0_compare_value);	126	cp0_compare_write(cp0_count_read() + cp0_compare_value);
127	clock();	127	clock();
-		128	keyboard_poll();
128	break;	129	break;
129	}	130	}
130	}	131	}
131	}	132	}
132		133
133	}	134	}
134		135

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/mips32/src/interrupt.c – Rev 534 → 567