Subversion Repositories HelenOS

Rev

Rev 2071 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
575 palkovsky 1
/*
2071 jermar 2
 * Copyright (c) 2005 Ondrej Palkovsky
575 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
 
1757 jermar 29
/** @addtogroup genericinterrupt
1702 cejka 30
 * @{
31
 */
1264 jermar 32
/**
1702 cejka 33
 * @file
1264 jermar 34
 * @brief   Interrupt redirector.
35
 *
36
 * This file provides means of registering interrupt handlers
37
 * by kernel functions and calling the handlers when interrupts
38
 * occur.
39
 */
40
 
575 palkovsky 41
#include <interrupt.h>
42
#include <debug.h>
578 palkovsky 43
#include <console/kconsole.h>
44
#include <console/console.h>
45
#include <console/chardev.h>
673 jermar 46
#include <console/cmd.h>
578 palkovsky 47
#include <panic.h>
48
#include <print.h>
49
#include <symtab.h>
575 palkovsky 50
 
51
static struct {
578 palkovsky 52
    const char *name;
575 palkovsky 53
    iroutine f;
578 palkovsky 54
} exc_table[IVT_ITEMS];
575 palkovsky 55
 
623 jermar 56
SPINLOCK_INITIALIZE(exctbl_lock);
578 palkovsky 57
 
58
/** Register exception handler
59
 *
60
 * @param n Exception number
61
 * @param name Description
62
 * @param f Exception handler
63
 */
64
iroutine exc_register(int n, const char *name, iroutine f)
575 palkovsky 65
{
66
    ASSERT(n < IVT_ITEMS);
67
 
68
    iroutine old;
69
 
578 palkovsky 70
    spinlock_lock(&exctbl_lock);
71
 
72
    old = exc_table[n].f;
73
    exc_table[n].f = f;
74
    exc_table[n].name = name;
75
 
76
    spinlock_unlock(&exctbl_lock); 
77
 
575 palkovsky 78
    return old;
79
}
80
 
578 palkovsky 81
/** Dispatch exception according to exception table
82
 *
575 palkovsky 83
 * Called directly from the assembler code.
84
 * CPU is interrupts_disable()'d.
85
 */
958 jermar 86
void exc_dispatch(int n, istate_t *istate)
575 palkovsky 87
{
88
    ASSERT(n < IVT_ITEMS);
89
 
958 jermar 90
    exc_table[n].f(n + IVT_FIRST, istate);
1597 palkovsky 91
    /* This is a safe place to exit exiting thread */
92
    if (THREAD && THREAD->interrupted && istate_from_uspace(istate))
93
        thread_exit();
575 palkovsky 94
}
578 palkovsky 95
 
96
/** Default 'null' exception handler */
958 jermar 97
static void exc_undef(int n, istate_t *istate)
578 palkovsky 98
{
1595 palkovsky 99
    fault_if_from_uspace(istate, "Unhandled exception %d.", n);
578 palkovsky 100
    panic("Unhandled exception %d.", n);
101
}
102
 
664 jermar 103
/** kconsole cmd - print all exceptions */
578 palkovsky 104
static int exc_print_cmd(cmd_arg_t *argv)
105
{
106
    int i;
107
    char *symbol;
108
 
109
    spinlock_lock(&exctbl_lock);
582 palkovsky 110
    printf("Exc Description Handler\n");
578 palkovsky 111
    for (i=0; i < IVT_ITEMS; i++) {
1780 jermar 112
        symbol = get_symtab_entry((unative_t)exc_table[i].f);
578 palkovsky 113
        if (!symbol)
114
            symbol = "not found";
1224 cejka 115
        printf("%d %s %.*p(%s)\n", i + IVT_FIRST, exc_table[i].name,
1780 jermar 116
               sizeof(uintptr_t) * 2, exc_table[i].f,symbol);      
578 palkovsky 117
        if (!((i+1) % 20)) {
118
            printf("Press any key to continue.");
579 palkovsky 119
            spinlock_unlock(&exctbl_lock);
578 palkovsky 120
            getc(stdin);
579 palkovsky 121
            spinlock_lock(&exctbl_lock);
578 palkovsky 122
            printf("\n");
123
        }
124
    }
125
    spinlock_unlock(&exctbl_lock);
126
 
127
    return 1;
128
}
129
 
130
static cmd_info_t exc_info = {
673 jermar 131
    .name = "exc",
586 jermar 132
    .description = "Print exception table.",
578 palkovsky 133
    .func = exc_print_cmd,
134
    .help = NULL,
135
    .argc = 0,
136
    .argv = NULL
137
};
138
 
139
/** Initialize generic exception handling support */
140
void exc_init(void)
141
{
142
    int i;
143
 
144
    for (i=0;i < IVT_ITEMS; i++)
958 jermar 145
        exc_register(i, "undef", (iroutine) exc_undef);
578 palkovsky 146
 
673 jermar 147
    cmd_initialize(&exc_info);
578 palkovsky 148
    if (!cmd_register(&exc_info))
149
        panic("could not register command %s\n", exc_info.name);
150
}
151
 
1757 jermar 152
/** @}
1702 cejka 153
 */