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575 palkovsky 1
/*
2071 jermar 2
 * Copyright (c) 2005 Ondrej Palkovsky
575 palkovsky 3
 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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1757 jermar 29
/** @addtogroup genericinterrupt
1702 cejka 30
 * @{
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 */
1264 jermar 32
/**
1702 cejka 33
 * @file
1264 jermar 34
 * @brief   Interrupt redirector.
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 *
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 * This file provides means of registering interrupt handlers
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 * by kernel functions and calling the handlers when interrupts
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 * occur.
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 */
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575 palkovsky 41
#include <interrupt.h>
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#include <debug.h>
578 palkovsky 43
#include <console/kconsole.h>
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#include <console/console.h>
673 jermar 45
#include <console/cmd.h>
578 palkovsky 46
#include <panic.h>
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#include <print.h>
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#include <symtab.h>
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static struct {
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    const char *name;
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    iroutine f;
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} exc_table[IVT_ITEMS];
575 palkovsky 54
 
623 jermar 55
SPINLOCK_INITIALIZE(exctbl_lock);
578 palkovsky 56
 
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/** Register exception handler
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 *
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 * @param n Exception number
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 * @param name Description
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 * @param f Exception handler
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 */
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iroutine exc_register(int n, const char *name, iroutine f)
575 palkovsky 64
{
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    ASSERT(n < IVT_ITEMS);
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    iroutine old;
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578 palkovsky 69
    spinlock_lock(&exctbl_lock);
4085 decky 70
 
578 palkovsky 71
    old = exc_table[n].f;
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    exc_table[n].f = f;
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    exc_table[n].name = name;
4085 decky 74
 
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    spinlock_unlock(&exctbl_lock);
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575 palkovsky 77
    return old;
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}
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578 palkovsky 80
/** Dispatch exception according to exception table
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 *
575 palkovsky 82
 * Called directly from the assembler code.
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 * CPU is interrupts_disable()'d.
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 */
958 jermar 85
void exc_dispatch(int n, istate_t *istate)
575 palkovsky 86
{
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    ASSERT(n < IVT_ITEMS);
3613 svoboda 88
 
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#ifdef CONFIG_UDEBUG
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    if (THREAD) THREAD->udebug.uspace_state = istate;
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#endif
575 palkovsky 92
 
958 jermar 93
    exc_table[n].f(n + IVT_FIRST, istate);
3613 svoboda 94
 
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#ifdef CONFIG_UDEBUG
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    if (THREAD) THREAD->udebug.uspace_state = NULL;
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#endif
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1597 palkovsky 99
    /* This is a safe place to exit exiting thread */
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    if (THREAD && THREAD->interrupted && istate_from_uspace(istate))
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        thread_exit();
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}
578 palkovsky 103
 
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/** Default 'null' exception handler */
958 jermar 105
static void exc_undef(int n, istate_t *istate)
578 palkovsky 106
{
3790 svoboda 107
    fault_if_from_uspace(istate, "Unhandled exception %d.", n);
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    panic("Unhandled exception %d.", n);
578 palkovsky 109
}
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3707 decky 111
#ifdef CONFIG_KCONSOLE
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664 jermar 113
/** kconsole cmd - print all exceptions */
3707 decky 114
static int cmd_exc_print(cmd_arg_t *argv)
578 palkovsky 115
{
2745 decky 116
#if (IVT_ITEMS > 0)
2712 decky 117
    unsigned int i;
578 palkovsky 118
    char *symbol;
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120
    spinlock_lock(&exctbl_lock);
3055 decky 121
 
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#ifdef __32_BITS__
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    printf("Exc Description          Handler    Symbol\n");
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    printf("--- -------------------- ---------- --------\n");
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#endif
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#ifdef __64_BITS__
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    printf("Exc Description          Handler            Symbol\n");
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    printf("--- -------------------- ------------------ --------\n");
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#endif
2712 decky 131
 
132
    for (i = 0; i < IVT_ITEMS; i++) {
4137 svoboda 133
        symbol = symtab_fmt_name_lookup((unative_t) exc_table[i].f);
3055 decky 134
 
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#ifdef __32_BITS__
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        printf("%-3u %-20s %10p %s\n", i + IVT_FIRST, exc_table[i].name,
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            exc_table[i].f, symbol);
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#endif
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#ifdef __64_BITS__
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        printf("%-3u %-20s %18p %s\n", i + IVT_FIRST, exc_table[i].name,
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            exc_table[i].f, symbol);
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#endif
2712 decky 144
 
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        if (((i + 1) % 20) == 0) {
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            printf(" -- Press any key to continue -- ");
579 palkovsky 147
            spinlock_unlock(&exctbl_lock);
4310 decky 148
            indev_pop_character(stdin);
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            spinlock_lock(&exctbl_lock);
578 palkovsky 150
            printf("\n");
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        }
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    }
2712 decky 153
 
578 palkovsky 154
    spinlock_unlock(&exctbl_lock);
2745 decky 155
#endif
578 palkovsky 156
 
157
    return 1;
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}
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3707 decky 160
 
578 palkovsky 161
static cmd_info_t exc_info = {
673 jermar 162
    .name = "exc",
586 jermar 163
    .description = "Print exception table.",
3707 decky 164
    .func = cmd_exc_print,
578 palkovsky 165
    .help = NULL,
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    .argc = 0,
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    .argv = NULL
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};
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3707 decky 170
#endif
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578 palkovsky 172
/** Initialize generic exception handling support */
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void exc_init(void)
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{
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    int i;
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3055 decky 177
    for (i = 0; i < IVT_ITEMS; i++)
958 jermar 178
        exc_register(i, "undef", (iroutine) exc_undef);
578 palkovsky 179
 
3707 decky 180
#ifdef CONFIG_KCONSOLE
673 jermar 181
    cmd_initialize(&exc_info);
578 palkovsky 182
    if (!cmd_register(&exc_info))
3707 decky 183
        printf("Cannot register command %s\n", exc_info.name);
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#endif
578 palkovsky 185
}
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1757 jermar 187
/** @}
1702 cejka 188
 */