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  1. /*
  2.  * Copyright (C) 2001-2004 Jakub Jermar
  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.  
  29. #include <func.h>
  30. #include <print.h>
  31. #include <cpu.h>
  32. #include <arch/asm.h>
  33. #include <arch.h>
  34. #include <typedefs.h>
  35. #include <console/kconsole.h>
  36.  
  37. __u32   haltstate = 0; /**< Halt flag */
  38.  
  39.  
  40. /** Halt wrapper
  41.  *
  42.  * Set halt flag and halt the cpu.
  43.  *
  44.  */
  45. void halt(void)
  46. {
  47.     haltstate = 1;
  48.     interrupts_disable();
  49. #ifdef CONFIG_DEBUG
  50.     printf("\n");
  51.     kconsole(NULL); /* Run kconsole as a last resort to user */
  52. #endif      
  53.  
  54.     if (CPU)
  55.         printf("cpu%d: halted\n", CPU->id);
  56.     else
  57.         printf("cpu: halted\n");
  58.     cpu_halt();
  59. }
  60.  
  61. /** Return number of characters in a string.
  62.  *
  63.  * @param str NULL terminated string.
  64.  *
  65.  * @return Number of characters in str.
  66.  */
  67. size_t strlen(const char *str)
  68. {
  69.     int i;
  70.    
  71.     for (i = 0; str[i]; i++)
  72.         ;
  73.    
  74.     return i;
  75. }
  76.  
  77. /** Compare two NULL terminated strings
  78.  *
  79.  * Do a char-by-char comparison of two NULL terminated strings.
  80.  * The strings are considered equal iff they consist of the same
  81.  * characters on the minimum of their lengths and specified maximal
  82.  * length.
  83.  *
  84.  * @param src First string to compare.
  85.  * @param dst Second string to compare.
  86.  * @param len Maximal length for comparison.
  87.  *
  88.  * @return 0 if the strings are equal, -1 if first is smaller, 1 if second smaller.
  89.  *
  90.  */
  91. int strncmp(const char *src, const char *dst, size_t len)
  92. {
  93.     int i;
  94.    
  95.     i = 0;
  96.     for (;*src && *dst && i < len;src++,dst++,i++) {
  97.         if (*src < *dst)
  98.             return -1;
  99.         if (*src > *dst)
  100.             return 1;
  101.     }
  102.     if (i == len || *src == *dst)
  103.         return 0;
  104.     if (*src < *dst)
  105.         return -1;
  106.     return 1;
  107. }
  108.  
  109. /** Copy NULL terminated string.
  110.  *
  111.  * Copy at most 'len' characters from string 'src' to 'dest'.
  112.  * If 'src' is shorter than 'len', '\0' is inserted behind the
  113.  * last copied character.
  114.  *
  115.  * @param src Source string.
  116.  * @param dst Destination buffer.
  117.  * @param len Size of destination buffer.
  118.  */
  119. void strncpy(char *dest, const char *src, size_t len)
  120. {
  121.     int i;
  122.     for (i = 0; i < len; i++) {
  123.         if (!(dest[i] = src[i]))
  124.             return;
  125.     }
  126.     dest[i-1] = '\0';
  127. }
  128.  
  129. /** Convert ascii representation to __native
  130.  *
  131.  * Supports 0x for hexa & 0 for octal notation.
  132.  * Does not check for overflows, does not support negative numbers
  133.  *
  134.  * @param text Textual representation of number
  135.  * @return Converted number or 0 if no valid number ofund
  136.  */
  137. __native atoi(const char *text)
  138. {
  139.     int base = 10;
  140.     __native result = 0;
  141.  
  142.     if (text[0] == '0' && text[1] == 'x') {
  143.         base = 16;
  144.         text += 2;
  145.     } else if (text[0] == '0')
  146.         base = 8;
  147.  
  148.     while (*text) {
  149.         if (base != 16 && \
  150.             ((*text >= 'A' && *text <= 'F' )
  151.              || (*text >='a' && *text <='f')))
  152.             break;
  153.         if (base == 8 && *text >='8')
  154.             break;
  155.  
  156.         if (*text >= '0' && *text <= '9') {
  157.             result *= base;
  158.             result += *text - '0';
  159.         } else if (*text >= 'A' && *text <= 'F') {
  160.             result *= base;
  161.             result += *text - 'A' + 10;
  162.         } else if (*text >= 'a' && *text <= 'f') {
  163.             result *= base;
  164.             result += *text - 'a' + 10;
  165.         } else
  166.             break;
  167.         text++;
  168.     }
  169.  
  170.     return result;
  171. }
  172.