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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.  
  42. /* This is a symbol so the type is only dummy. Obtain the value using &. */
  43. extern int _hardcoded_unmapped_size;
  44.  
  45. /** C part of ia32 boot sequence.
  46.  * @param signature Should contain the multiboot signature.
  47.  * @param mi        Pointer to the multiboot information structure.
  48.  */
  49. void ia32_cboot(uint32_t signature, const mb_info_t *mi)
  50. {
  51.     uint32_t flags;
  52.     mb_mod_t *mods;
  53.     uint32_t i;
  54.  
  55.     if (signature == MULTIBOOT_LOADER_MAGIC) {
  56.         flags = mi->flags;
  57.     } else {
  58.         /* No multiboot info available. */
  59.         flags = 0;
  60.     }
  61.  
  62.     /* Copy module information. */
  63.  
  64.     if ((flags & MBINFO_FLAGS_MODS) != 0) {
  65.         init.cnt = mi->mods_count;
  66.         mods = mi->mods_addr;
  67.  
  68.         for (i = 0; i < init.cnt; i++) {
  69.             init.tasks[i].addr = mods[i].start + 0x80000000;
  70.             init.tasks[i].size = mods[i].end - mods[i].start;
  71.         }
  72.     } else {
  73.         init.cnt = 0;
  74.     }
  75.  
  76.     /* Copy memory map. */
  77.  
  78.     int32_t mmap_length;
  79.     mb_mmap_t *mme;
  80.     uint32_t size;
  81.  
  82.     if ((flags & MBINFO_FLAGS_MMAP) != 0) {
  83.         mmap_length = mi->mmap_length;
  84.         mme = mi->mmap_addr;
  85.         e820counter = 0;
  86.  
  87.         i = 0;
  88.         while (mmap_length > 0) {
  89.             e820table[i++] = mme->mm_info;
  90.  
  91.             /* Compute address of next structure. */
  92.             size = sizeof(mme->size) + mme->size;
  93.             mme = ((void *) mme) + size;
  94.             mmap_length -= size;
  95.         }
  96.  
  97.         e820counter = i;
  98.     } else {
  99.         e820counter = 0;
  100.     }
  101.  
  102. #ifdef CONFIG_SMP
  103.     /* Copy AP bootstrap routines below 1 MB. */
  104.     memcpy((void *) AP_BOOT_OFFSET, (void *) BOOT_OFFSET,
  105.         (size_t) &_hardcoded_unmapped_size);
  106. #endif
  107.  
  108.     main_bsp();
  109. }
  110.  
  111. /** @}
  112.  */
  113.