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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. /** @addtogroup generic
  30.  * @{
  31.  */
  32.  
  33. /**
  34.  * @file
  35.  * @brief   Miscellaneous functions.
  36.  */
  37.  
  38. #include <func.h>
  39. #include <print.h>
  40. #include <cpu.h>
  41. #include <arch/asm.h>
  42. #include <arch.h>
  43. #include <console/kconsole.h>
  44.  
  45. atomic_t haltstate = {0}; /**< Halt flag */
  46.  
  47.  
  48. /** Halt wrapper
  49.  *
  50.  * Set halt flag and halt the cpu.
  51.  *
  52.  */
  53. void halt()
  54. {
  55. #ifdef CONFIG_DEBUG
  56.     bool rundebugger = false;
  57.  
  58.     if (!atomic_get(&haltstate)) {
  59.         atomic_set(&haltstate, 1);
  60.         rundebugger = true;
  61.     }
  62. #else
  63.     atomic_set(&haltstate, 1);
  64. #endif
  65.  
  66.     interrupts_disable();
  67.    
  68. #if (defined(CONFIG_DEBUG)) && (defined(CONFIG_KCONSOLE))
  69.     if (rundebugger)
  70.         kconsole("panic", "\nLast resort kernel console ready\n", false);
  71. #endif
  72.    
  73.     if (CPU)
  74.         printf("cpu%u: halted\n", CPU->id);
  75.     else
  76.         printf("cpu: halted\n");
  77.     cpu_halt();
  78. }
  79.  
  80. /** Convert ascii representation to unative_t
  81.  *
  82.  * Supports 0x for hexa & 0 for octal notation.
  83.  * Does not check for overflows, does not support negative numbers
  84.  *
  85.  * @param text Textual representation of number
  86.  * @return Converted number or 0 if no valid number ofund
  87.  */
  88. unative_t atoi(const char *text)
  89. {
  90.     int base = 10;
  91.     unative_t result = 0;
  92.  
  93.     if (text[0] == '0' && text[1] == 'x') {
  94.         base = 16;
  95.         text += 2;
  96.     } else if (text[0] == '0')
  97.         base = 8;
  98.  
  99.     while (*text) {
  100.         if (base != 16 && \
  101.             ((*text >= 'A' && *text <= 'F' )
  102.              || (*text >='a' && *text <='f')))
  103.             break;
  104.         if (base == 8 && *text >='8')
  105.             break;
  106.  
  107.         if (*text >= '0' && *text <= '9') {
  108.             result *= base;
  109.             result += *text - '0';
  110.         } else if (*text >= 'A' && *text <= 'F') {
  111.             result *= base;
  112.             result += *text - 'A' + 10;
  113.         } else if (*text >= 'a' && *text <= 'f') {
  114.             result *= base;
  115.             result += *text - 'a' + 10;
  116.         } else
  117.             break;
  118.         text++;
  119.     }
  120.  
  121.     return result;
  122. }
  123.  
  124.  
  125. void order(const uint64_t val, uint64_t *rv, char *suffix)
  126. {
  127.     if (val > 10000000000000000000ULL) {
  128.         *rv = val / 1000000000000000000ULL;
  129.         *suffix = 'Z';
  130.     } else if (val > 1000000000000000000ULL) {
  131.         *rv = val / 1000000000000000ULL;
  132.         *suffix = 'E';
  133.     } else if (val > 1000000000000000ULL) {
  134.         *rv = val / 1000000000000ULL;
  135.         *suffix = 'T';
  136.     } else if (val > 1000000000000ULL) {
  137.         *rv = val / 1000000000ULL;
  138.         *suffix = 'G';
  139.     } else if (val > 1000000000ULL) {
  140.         *rv = val / 1000000ULL;
  141.         *suffix = 'M';
  142.     } else if (val > 1000000ULL) {
  143.         *rv = val / 1000ULL;
  144.         *suffix = 'k';
  145.     } else {
  146.         *rv = val;
  147.         *suffix = ' ';
  148.     }
  149. }
  150.  
  151. /** @}
  152.  */
  153.