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1 jermar 1
/*
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 * Copyright (C) 2001-2004 Jakub Jermar
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 * 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 generic
1702 cejka 30
 * @{
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 */
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1264 jermar 33
/**
1702 cejka 34
 * @file
1264 jermar 35
 * @brief   Miscellaneous functions.
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 */
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1 jermar 38
#include <func.h>
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#include <print.h>
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#include <cpu.h>
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#include <arch/asm.h>
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#include <arch.h>
517 jermar 43
#include <typedefs.h>
607 palkovsky 44
#include <console/kconsole.h>
1 jermar 45
 
631 palkovsky 46
atomic_t haltstate = {0}; /**< Halt flag */
1 jermar 47
 
62 decky 48
 
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/** Halt wrapper
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 *
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 * Set halt flag and halt the cpu.
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 *
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 */
631 palkovsky 54
void halt()
1 jermar 55
{
631 palkovsky 56
#ifdef CONFIG_DEBUG
659 jermar 57
    bool rundebugger = false;
631 palkovsky 58
 
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//      TODO test_and_set not defined on all arches
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//  if (!test_and_set(&haltstate))
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    if (!atomic_get(&haltstate)) {
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        atomic_set(&haltstate, 1);
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        rundebugger = true;
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    }
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#else
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    atomic_set(&haltstate, 1);
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#endif
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413 jermar 69
    interrupts_disable();
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#ifdef CONFIG_DEBUG
631 palkovsky 71
    if (rundebugger) {
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        printf("\n");
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        kconsole("panic"); /* Run kconsole as a last resort to user */
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    }
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#endif      
227 jermar 76
    if (CPU)
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        printf("cpu%d: halted\n", CPU->id);
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    else
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        printf("cpu: halted\n");
1 jermar 80
    cpu_halt();
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}
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517 jermar 83
/** Return number of characters in a string.
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 *
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 * @param str NULL terminated string.
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 *
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 * @return Number of characters in str.
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 */
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size_t strlen(const char *str)
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{
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    int i;
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    for (i = 0; str[i]; i++)
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        ;
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    return i;
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}
1 jermar 98
 
62 decky 99
/** Compare two NULL terminated strings
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 *
517 jermar 101
 * Do a char-by-char comparison of two NULL terminated strings.
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 * The strings are considered equal iff they consist of the same
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 * characters on the minimum of their lengths and specified maximal
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 * length.
62 decky 105
 *
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 * @param src First string to compare.
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 * @param dst Second string to compare.
517 jermar 108
 * @param len Maximal length for comparison.
62 decky 109
 *
601 palkovsky 110
 * @return 0 if the strings are equal, -1 if first is smaller, 1 if second smaller.
62 decky 111
 *
1 jermar 112
 */
518 jermar 113
int strncmp(const char *src, const char *dst, size_t len)
1 jermar 114
{
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    int i;
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    i = 0;
601 palkovsky 118
    for (;*src && *dst && i < len;src++,dst++,i++) {
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        if (*src < *dst)
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            return -1;
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        if (*src > *dst)
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            return 1;
1 jermar 123
    }
601 palkovsky 124
    if (i == len || *src == *dst)
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        return 0;
635 palkovsky 126
    if (!*src)
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        return -1;
1 jermar 128
    return 1;
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}
331 bondari 130
 
518 jermar 131
/** Copy NULL terminated string.
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 *
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 * Copy at most 'len' characters from string 'src' to 'dest'.
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 * If 'src' is shorter than 'len', '\0' is inserted behind the
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 * last copied character.
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 *
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 * @param src Source string.
1708 jermar 138
 * @param dest Destination buffer.
518 jermar 139
 * @param len Size of destination buffer.
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 */
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void strncpy(char *dest, const char *src, size_t len)
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{
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    int i;
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    for (i = 0; i < len; i++) {
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        if (!(dest[i] = src[i]))
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            return;
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    }
585 palkovsky 148
    dest[i-1] = '\0';
518 jermar 149
}
582 palkovsky 150
 
1780 jermar 151
/** Convert ascii representation to unative_t
582 palkovsky 152
 *
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 * Supports 0x for hexa & 0 for octal notation.
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 * Does not check for overflows, does not support negative numbers
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 *
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 * @param text Textual representation of number
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 * @return Converted number or 0 if no valid number ofund
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 */
1780 jermar 159
unative_t atoi(const char *text)
582 palkovsky 160
{
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    int base = 10;
1780 jermar 162
    unative_t result = 0;
582 palkovsky 163
 
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    if (text[0] == '0' && text[1] == 'x') {
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        base = 16;
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        text += 2;
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    } else if (text[0] == '0')
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        base = 8;
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    while (*text) {
603 palkovsky 171
        if (base != 16 && \
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            ((*text >= 'A' && *text <= 'F' )
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             || (*text >='a' && *text <='f')))
582 palkovsky 174
            break;
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        if (base == 8 && *text >='8')
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            break;
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591 palkovsky 178
        if (*text >= '0' && *text <= '9') {
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            result *= base;
582 palkovsky 180
            result += *text - '0';
591 palkovsky 181
        } else if (*text >= 'A' && *text <= 'F') {
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            result *= base;
582 palkovsky 183
            result += *text - 'A' + 10;
603 palkovsky 184
        } else if (*text >= 'a' && *text <= 'f') {
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            result *= base;
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            result += *text - 'a' + 10;
591 palkovsky 187
        } else
582 palkovsky 188
            break;
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        text++;
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    }
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192
    return result;
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}
1702 cejka 194
 
1757 jermar 195
/** @}
1702 cejka 196
 */