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


/*
 * Copyright (C) 2005 Ondrej Palkovsky
 * 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.
 */
 
/**
 * @file    interrupt.c
 * @brief   Interrupt redirector.
 *
 * This file provides means of registering interrupt handlers
 * by kernel functions and calling the handlers when interrupts
 * occur.
 */
 
#include <interrupt.h>
#include <debug.h>
#include <console/kconsole.h>
#include <console/console.h>
#include <console/chardev.h>
#include <console/cmd.h>
#include <panic.h>
#include <print.h>
#include <symtab.h>
 
static struct {
    const char *name;
    iroutine f;
} exc_table[IVT_ITEMS];
 
SPINLOCK_INITIALIZE(exctbl_lock);
 
/** Register exception handler
 *
 * @param n Exception number
 * @param name Description
 * @param f Exception handler
 */
iroutine exc_register(int n, const char *name, iroutine f)
{
    ASSERT(n < IVT_ITEMS);
   
    iroutine old;
   
    spinlock_lock(&exctbl_lock);
 
    old = exc_table[n].f;
    exc_table[n].f = f;
    exc_table[n].name = name;
 
    spinlock_unlock(&exctbl_lock); 
 
    return old;
}
 
/** Dispatch exception according to exception table
 *
 * Called directly from the assembler code.
 * CPU is interrupts_disable()'d.
 */
void exc_dispatch(int n, istate_t *istate)
{
    ASSERT(n < IVT_ITEMS);
   
    exc_table[n].f(n + IVT_FIRST, istate);
    /* This is a safe place to exit exiting thread */
    if (THREAD && THREAD->interrupted && istate_from_uspace(istate))
        thread_exit();
}
 
/** Default 'null' exception handler */
static void exc_undef(int n, istate_t *istate)
{
    fault_if_from_uspace(istate, "Unhandled exception %d.", n);
    panic("Unhandled exception %d.", n);
}
 
/** kconsole cmd - print all exceptions */
static int exc_print_cmd(cmd_arg_t *argv)
{
    int i;
    char *symbol;
 
    spinlock_lock(&exctbl_lock);
    printf("Exc Description Handler\n");
    for (i=0; i < IVT_ITEMS; i++) {
        symbol = get_symtab_entry((__native)exc_table[i].f);
        if (!symbol)
            symbol = "not found";
        printf("%d %s %.*p(%s)\n", i + IVT_FIRST, exc_table[i].name,
               sizeof(__address) * 2, exc_table[i].f,symbol);      
        if (!((i+1) % 20)) {
            printf("Press any key to continue.");
            spinlock_unlock(&exctbl_lock);
            getc(stdin);
            spinlock_lock(&exctbl_lock);
            printf("\n");
        }
    }
    spinlock_unlock(&exctbl_lock);
   
    return 1;
}
 
static cmd_info_t exc_info = {
    .name = "exc",
    .description = "Print exception table.",
    .func = exc_print_cmd,
    .help = NULL,
    .argc = 0,
    .argv = NULL
};
 
/** Initialize generic exception handling support */
void exc_init(void)
{
    int i;
 
    for (i=0;i < IVT_ITEMS; i++)
        exc_register(i, "undef", (iroutine) exc_undef);
 
    cmd_initialize(&exc_info);
    if (!cmd_register(&exc_info))
        panic("could not register command %s\n", exc_info.name);
}
 
 

Rev 1595	Rev 1597
1	/*	1	/*
2	* Copyright (C) 2005 Ondrej Palkovsky	2	* Copyright (C) 2005 Ondrej Palkovsky
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	/**	29	/**
30	* @file interrupt.c	30	* @file interrupt.c
31	* @brief Interrupt redirector.	31	* @brief Interrupt redirector.
32	*	32	*
33	* This file provides means of registering interrupt handlers	33	* This file provides means of registering interrupt handlers
34	* by kernel functions and calling the handlers when interrupts	34	* by kernel functions and calling the handlers when interrupts
35	* occur.	35	* occur.
36	*/	36	*/
37		37
38	#include <interrupt.h>	38	#include <interrupt.h>
39	#include <debug.h>	39	#include <debug.h>
40	#include <console/kconsole.h>	40	#include <console/kconsole.h>
41	#include <console/console.h>	41	#include <console/console.h>
42	#include <console/chardev.h>	42	#include <console/chardev.h>
43	#include <console/cmd.h>	43	#include <console/cmd.h>
44	#include <panic.h>	44	#include <panic.h>
45	#include <print.h>	45	#include <print.h>
46	#include <symtab.h>	46	#include <symtab.h>
47		47
48	static struct {	48	static struct {
49	const char *name;	49	const char *name;
50	iroutine f;	50	iroutine f;
51	} exc_table[IVT_ITEMS];	51	} exc_table[IVT_ITEMS];
52		52
53	SPINLOCK_INITIALIZE(exctbl_lock);	53	SPINLOCK_INITIALIZE(exctbl_lock);
54		54
55	/** Register exception handler	55	/** Register exception handler
56	*	56	*
57	* @param n Exception number	57	* @param n Exception number
58	* @param name Description	58	* @param name Description
59	* @param f Exception handler	59	* @param f Exception handler
60	*/	60	*/
61	iroutine exc_register(int n, const char *name, iroutine f)	61	iroutine exc_register(int n, const char *name, iroutine f)
62	{	62	{
63	ASSERT(n < IVT_ITEMS);	63	ASSERT(n < IVT_ITEMS);
64		64
65	iroutine old;	65	iroutine old;
66		66
67	spinlock_lock(&exctbl_lock);	67	spinlock_lock(&exctbl_lock);
68		68
69	old = exc_table[n].f;	69	old = exc_table[n].f;
70	exc_table[n].f = f;	70	exc_table[n].f = f;
71	exc_table[n].name = name;	71	exc_table[n].name = name;
72		72
73	spinlock_unlock(&exctbl_lock);	73	spinlock_unlock(&exctbl_lock);
74		74
75	return old;	75	return old;
76	}	76	}
77		77
78	/** Dispatch exception according to exception table	78	/** Dispatch exception according to exception table
79	*	79	*
80	* Called directly from the assembler code.	80	* Called directly from the assembler code.
81	* CPU is interrupts_disable()'d.	81	* CPU is interrupts_disable()'d.
82	*/	82	*/
83	void exc_dispatch(int n, istate_t *istate)	83	void exc_dispatch(int n, istate_t *istate)
84	{	84	{
85	ASSERT(n < IVT_ITEMS);	85	ASSERT(n < IVT_ITEMS);
86		86
87	exc_table[n].f(n + IVT_FIRST, istate);	87	exc_table[n].f(n + IVT_FIRST, istate);
-		88	/* This is a safe place to exit exiting thread */
-		89	if (THREAD && THREAD->interrupted && istate_from_uspace(istate))
-		90	thread_exit();
88	}	91	}
89		92
90	/** Default 'null' exception handler */	93	/** Default 'null' exception handler */
91	static void exc_undef(int n, istate_t *istate)	94	static void exc_undef(int n, istate_t *istate)
92	{	95	{
93	fault_if_from_uspace(istate, "Unhandled exception %d.", n);	96	fault_if_from_uspace(istate, "Unhandled exception %d.", n);
94	panic("Unhandled exception %d.", n);	97	panic("Unhandled exception %d.", n);
95	}	98	}
96		99
97	/** kconsole cmd - print all exceptions */	100	/** kconsole cmd - print all exceptions */
98	static int exc_print_cmd(cmd_arg_t *argv)	101	static int exc_print_cmd(cmd_arg_t *argv)
99	{	102	{
100	int i;	103	int i;
101	char *symbol;	104	char *symbol;
102		105
103	spinlock_lock(&exctbl_lock);	106	spinlock_lock(&exctbl_lock);
104	printf("Exc Description Handler\n");	107	printf("Exc Description Handler\n");
105	for (i=0; i < IVT_ITEMS; i++) {	108	for (i=0; i < IVT_ITEMS; i++) {
106	symbol = get_symtab_entry((__native)exc_table[i].f);	109	symbol = get_symtab_entry((__native)exc_table[i].f);
107	if (!symbol)	110	if (!symbol)
108	symbol = "not found";	111	symbol = "not found";
109	printf("%d %s %.*p(%s)\n", i + IVT_FIRST, exc_table[i].name,	112	printf("%d %s %.*p(%s)\n", i + IVT_FIRST, exc_table[i].name,
110	sizeof(__address) * 2, exc_table[i].f,symbol);	113	sizeof(__address) * 2, exc_table[i].f,symbol);
111	if (!((i+1) % 20)) {	114	if (!((i+1) % 20)) {
112	printf("Press any key to continue.");	115	printf("Press any key to continue.");
113	spinlock_unlock(&exctbl_lock);	116	spinlock_unlock(&exctbl_lock);
114	getc(stdin);	117	getc(stdin);
115	spinlock_lock(&exctbl_lock);	118	spinlock_lock(&exctbl_lock);
116	printf("\n");	119	printf("\n");
117	}	120	}
118	}	121	}
119	spinlock_unlock(&exctbl_lock);	122	spinlock_unlock(&exctbl_lock);
120		123
121	return 1;	124	return 1;
122	}	125	}
123		126
124	static cmd_info_t exc_info = {	127	static cmd_info_t exc_info = {
125	.name = "exc",	128	.name = "exc",
126	.description = "Print exception table.",	129	.description = "Print exception table.",
127	.func = exc_print_cmd,	130	.func = exc_print_cmd,
128	.help = NULL,	131	.help = NULL,
129	.argc = 0,	132	.argc = 0,
130	.argv = NULL	133	.argv = NULL
131	};	134	};
132		135
133	/** Initialize generic exception handling support */	136	/** Initialize generic exception handling support */
134	void exc_init(void)	137	void exc_init(void)
135	{	138	{
136	int i;	139	int i;
137		140
138	for (i=0;i < IVT_ITEMS; i++)	141	for (i=0;i < IVT_ITEMS; i++)
139	exc_register(i, "undef", (iroutine) exc_undef);	142	exc_register(i, "undef", (iroutine) exc_undef);
140		143
141	cmd_initialize(&exc_info);	144	cmd_initialize(&exc_info);
142	if (!cmd_register(&exc_info))	145	if (!cmd_register(&exc_info))
143	panic("could not register command %s\n", exc_info.name);	146	panic("could not register command %s\n", exc_info.name);
144	}	147	}
145		148
146		149

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/src/interrupt/interrupt.c – Rev 1595 → 1597