Subversion Repositories HelenOS-historic

Rev

Rev 1264 | Rev 1597 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
575 palkovsky 1 
/*
2 
 * Copyright (C) 2005 Ondrej Palkovsky
3 
 * All rights reserved.
4 
 *
5 
 * Redistribution and use in source and binary forms, with or without
6 
 * modification, are permitted provided that the following conditions
7 
 * are met:
8 
 *
9 
 * - Redistributions of source code must retain the above copyright
10 
 *   notice, this list of conditions and the following disclaimer.
11 
 * - Redistributions in binary form must reproduce the above copyright
12 
 *   notice, this list of conditions and the following disclaimer in the
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
15 
 *   derived from this software without specific prior written permission.
16 
 *
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
19 
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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
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
26 
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 
 */
28 
 
1264 jermar 29 
/**
30 
 * @file    interrupt.c
31 
 * @brief   Interrupt redirector.
32 
 *
33 
 * This file provides means of registering interrupt handlers
34 
 * by kernel functions and calling the handlers when interrupts
35 
 * occur.
36 
 */
37 
 
575 palkovsky 38 
#include <interrupt.h>
39 
#include <debug.h>
578 palkovsky 40 
#include <console/kconsole.h>
41 
#include <console/console.h>
42 
#include <console/chardev.h>
673 jermar 43 
#include <console/cmd.h>
578 palkovsky 44 
#include <panic.h>
45 
#include <print.h>
46 
#include <symtab.h>
575 palkovsky 47 
 
48 
static struct {
578 palkovsky 49 
    const char *name;
575 palkovsky 50 
    iroutine f;
578 palkovsky 51 
} exc_table[IVT_ITEMS];
575 palkovsky 52 
 
623 jermar 53 
SPINLOCK_INITIALIZE(exctbl_lock);
578 palkovsky 54 
 
55 
/** Register exception handler
56 
 *
57 
 * @param n Exception number
58 
 * @param name Description
59 
 * @param f Exception handler
60 
 */
61 
iroutine exc_register(int n, const char *name, iroutine f)
575 palkovsky 62 
{
63 
    ASSERT(n < IVT_ITEMS);
64 
 
65 
    iroutine old;
66 
 
578 palkovsky 67 
    spinlock_lock(&exctbl_lock);
68 
 
69 
    old = exc_table[n].f;
70 
    exc_table[n].f = f;
71 
    exc_table[n].name = name;
72 
 
73 
    spinlock_unlock(&exctbl_lock); 
74 
 
575 palkovsky 75 
    return old;
76 
}
77 
 
578 palkovsky 78 
/** Dispatch exception according to exception table
79 
 *
575 palkovsky 80 
 * Called directly from the assembler code.
81 
 * CPU is interrupts_disable()'d.
82 
 */
958 jermar 83 
void exc_dispatch(int n, istate_t *istate)
575 palkovsky 84 
{
85 
    ASSERT(n < IVT_ITEMS);
86 
 
958 jermar 87 
    exc_table[n].f(n + IVT_FIRST, istate);
575 palkovsky 88 
}
578 palkovsky 89 
 
90 
/** Default 'null' exception handler */
958 jermar 91 
static void exc_undef(int n, istate_t *istate)
578 palkovsky 92 
{
1595 palkovsky 93 
    fault_if_from_uspace(istate, "Unhandled exception %d.", n);
578 palkovsky 94 
    panic("Unhandled exception %d.", n);
95 
}
96 
 
664 jermar 97 
/** kconsole cmd - print all exceptions */
578 palkovsky 98 
static int exc_print_cmd(cmd_arg_t *argv)
99 
{
100 
    int i;
101 
    char *symbol;
102 
 
103 
    spinlock_lock(&exctbl_lock);
582 palkovsky 104 
    printf("Exc Description Handler\n");
578 palkovsky 105 
    for (i=0; i < IVT_ITEMS; i++) {
106 
        symbol = get_symtab_entry((__native)exc_table[i].f);
107 
        if (!symbol)
108 
            symbol = "not found";
1224 cejka 109 
        printf("%d %s %.*p(%s)\n", i + IVT_FIRST, exc_table[i].name,
110 
               sizeof(__address) * 2, exc_table[i].f,symbol);      
578 palkovsky 111 
        if (!((i+1) % 20)) {
112 
            printf("Press any key to continue.");
579 palkovsky 113 
            spinlock_unlock(&exctbl_lock);
578 palkovsky 114 
            getc(stdin);
579 palkovsky 115 
            spinlock_lock(&exctbl_lock);
578 palkovsky 116 
            printf("\n");
117 
        }
118 
    }
119 
    spinlock_unlock(&exctbl_lock);
120 
 
121 
    return 1;
122 
}
123 
 
124 
static cmd_info_t exc_info = {
673 jermar 125 
    .name = "exc",
586 jermar 126 
    .description = "Print exception table.",
578 palkovsky 127 
    .func = exc_print_cmd,
128 
    .help = NULL,
129 
    .argc = 0,
130 
    .argv = NULL
131 
};
132 
 
133 
/** Initialize generic exception handling support */
134 
void exc_init(void)
135 
{
136 
    int i;
137 
 
138 
    for (i=0;i < IVT_ITEMS; i++)
958 jermar 139 
        exc_register(i, "undef", (iroutine) exc_undef);
578 palkovsky 140 
 
673 jermar 141 
    cmd_initialize(&exc_info);
578 palkovsky 142 
    if (!cmd_register(&exc_info))
143 
        panic("could not register command %s\n", exc_info.name);
144 
}
145