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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 <mm/frame.h>
  30. #include <arch/mm/frame.h>
  31. #include <mm/vm.h>
  32. #include <config.h>
  33. #include <arch/boot/boot.h>
  34. #include <arch/boot/memmap.h>
  35. #include <panic.h>
  36. #include <debug.h>
  37. #include <align.h>
  38.  
  39. size_t hardcoded_unmapped_ktext_size = 0;
  40. size_t hardcoded_unmapped_kdata_size = 0;
  41.  
  42. __address last_frame = 0;
  43.  
  44. void frame_arch_init(void)
  45. {
  46.     __u8 i;
  47.    
  48.     if (config.cpu_active == 1) {
  49.  
  50.         /* Reserve frame 0 (BIOS data) */
  51.         frame_region_not_free(0, FRAME_SIZE);
  52.        
  53.         /* Reserve real mode bootstrap memory */
  54.         frame_region_not_free(BOOTSTRAP_OFFSET, hardcoded_unmapped_ktext_size + hardcoded_unmapped_kdata_size);
  55.        
  56.         for (i = 0; i < e820counter; i++) {
  57.             if (e820table[i].type == MEMMAP_MEMORY_AVAILABLE) {
  58.                 zone_create_in_region(e820table[i].base_address, e820table[i].size & ~(FRAME_SIZE-1));
  59.                 if (last_frame < ALIGN_UP(e820table[i].base_address + e820table[i].size, FRAME_SIZE))
  60.                     last_frame = ALIGN_UP(e820table[i].base_address + e820table[i].size, FRAME_SIZE);
  61.             }          
  62.         }
  63.     }
  64. }
  65.