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  1. /*
  2.  * Copyright (c) 2009 Jiri Svoboda
  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 ia32
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <main/main.h>
  36. #include <arch/boot/boot.h>
  37. #include <arch/boot/cboot.h>
  38. #include <arch/boot/memmap.h>
  39. #include <config.h>
  40. #include <memstr.h>
  41. #include <string.h>
  42. #include <macros.h>
  43.  
  44. /* This is a symbol so the type is only dummy. Obtain the value using &. */
  45. extern int _hardcoded_unmapped_size;
  46.  
  47. /** Extract command name from the multiboot module command line.
  48.  *
  49.  * @param buf      Destination buffer (will always null-terminate).
  50.  * @param n        Size of destination buffer.
  51.  * @param cmd_line Input string (the command line).
  52.  *
  53.  */
  54. static void extract_command(char *buf, size_t n, const char *cmd_line)
  55. {
  56.     const char *start, *end, *cp;
  57.     size_t max_len;
  58.    
  59.     /* Find the first space. */
  60.     end = strchr(cmd_line, ' ');
  61.     if (end == NULL)
  62.         end = cmd_line + strlen(cmd_line);
  63.    
  64.     /*
  65.      * Find last occurence of '/' before 'end'. If found, place start at
  66.      * next character. Otherwise, place start at beginning of buffer.
  67.      */
  68.     cp = end;
  69.     start = buf;
  70.     while (cp != start) {
  71.         if (*cp == '/') {
  72.             start = cp + 1;
  73.             break;
  74.         }
  75.         --cp;
  76.     }
  77.    
  78.     /* Copy the command and null-terminate the string. */
  79.     max_len = min(n - 1, (size_t) (end - start));
  80.     strncpy(buf, start, max_len + 1);
  81.     buf[max_len] = '\0';
  82. }
  83.  
  84. /** C part of ia32 boot sequence.
  85.  *
  86.  * @param signature Should contain the multiboot signature.
  87.  * @param mi        Pointer to the multiboot information structure.
  88.  */
  89. void ia32_cboot(uint32_t signature, const mb_info_t *mi)
  90. {
  91.     uint32_t flags;
  92.     mb_mod_t *mods;
  93.     uint32_t i;
  94.    
  95.     if (signature == MULTIBOOT_LOADER_MAGIC)
  96.         flags = mi->flags;
  97.     else {
  98.         /* No multiboot info available. */
  99.         flags = 0;
  100.     }
  101.    
  102.     /* Copy module information. */
  103.    
  104.     if ((flags & MBINFO_FLAGS_MODS) != 0) {
  105.         init.cnt = mi->mods_count;
  106.         mods = mi->mods_addr;
  107.        
  108.         for (i = 0; i < init.cnt; i++) {
  109.             init.tasks[i].addr = mods[i].start + 0x80000000;
  110.             init.tasks[i].size = mods[i].end - mods[i].start;
  111.            
  112.             /* Copy command line, if available. */
  113.             if (mods[i].string) {
  114.                 extract_command(init.tasks[i].name,
  115.                     CONFIG_TASK_NAME_BUFLEN,
  116.                     mods[i].string);
  117.             } else
  118.                 init.tasks[i].name[0] = '\0';
  119.         }
  120.     } else
  121.         init.cnt = 0;
  122.    
  123.     /* Copy memory map. */
  124.    
  125.     int32_t mmap_length;
  126.     mb_mmap_t *mme;
  127.     uint32_t size;
  128.    
  129.     if ((flags & MBINFO_FLAGS_MMAP) != 0) {
  130.         mmap_length = mi->mmap_length;
  131.         mme = mi->mmap_addr;
  132.         e820counter = 0;
  133.        
  134.         i = 0;
  135.         while (mmap_length > 0) {
  136.             e820table[i++] = mme->mm_info;
  137.            
  138.             /* Compute address of next structure. */
  139.             size = sizeof(mme->size) + mme->size;
  140.             mme = ((void *) mme) + size;
  141.             mmap_length -= size;
  142.         }
  143.        
  144.         e820counter = i;
  145.     } else
  146.         e820counter = 0;
  147.    
  148. #ifdef CONFIG_SMP
  149.     /* Copy AP bootstrap routines below 1 MB. */
  150.     memcpy((void *) AP_BOOT_OFFSET, (void *) BOOT_OFFSET,
  151.         (size_t) &_hardcoded_unmapped_size);
  152. #endif
  153.    
  154.     main_bsp();
  155. }
  156.  
  157. /** @}
  158.  */
  159.