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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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#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>
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#include <typedefs.h>
607 palkovsky 35
#include <console/kconsole.h>
1 jermar 36
 
631 palkovsky 37
atomic_t haltstate = {0}; /**< Halt flag */
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62 decky 39
 
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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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 */
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void halt()
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{
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#ifdef CONFIG_DEBUG
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    bool rundebugger = false;
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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 60
    interrupts_disable();
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#ifdef CONFIG_DEBUG
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    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      
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    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 71
    cpu_halt();
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}
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517 jermar 74
/** 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 89
 
62 decky 90
/** Compare two NULL terminated strings
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 *
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 * 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.
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 *
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 * @param src First string to compare.
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 * @param dst Second string to compare.
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 * @param len Maximal length for comparison.
62 decky 100
 *
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 * @return 0 if the strings are equal, -1 if first is smaller, 1 if second smaller.
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 *
1 jermar 103
 */
518 jermar 104
int strncmp(const char *src, const char *dst, size_t len)
1 jermar 105
{
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    int i;
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    i = 0;
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    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;
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    }
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    if (i == len || *src == *dst)
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        return 0;
635 palkovsky 117
    if (!*src)
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        return -1;
1 jermar 119
    return 1;
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}
331 bondari 121
 
518 jermar 122
/** 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.
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 * @param dst Destination buffer.
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 * @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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    }
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    dest[i-1] = '\0';
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}
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/** Convert ascii representation to __native
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 *
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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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 */
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__native atoi(const char *text)
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{
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    int base = 10;
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    __native result = 0;
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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) {
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        if (base != 16 && \
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            ((*text >= 'A' && *text <= 'F' )
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             || (*text >='a' && *text <='f')))
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            break;
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        if (base == 8 && *text >='8')
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            break;
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591 palkovsky 169
        if (*text >= '0' && *text <= '9') {
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            result *= base;
582 palkovsky 171
            result += *text - '0';
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        } else if (*text >= 'A' && *text <= 'F') {
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            result *= base;
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            result += *text - 'A' + 10;
603 palkovsky 175
        } else if (*text >= 'a' && *text <= 'f') {
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            result *= base;
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            result += *text - 'a' + 10;
591 palkovsky 178
        } else
582 palkovsky 179
            break;
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        text++;
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    }
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    return result;
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}