reactos/boot/freeldr/freeldr/arch/i386/mb.S

   1 /*
   2  *  FreeLoader
   3  *  Copyright (C) 1998-2002  Brian Palmer  <brianp@sginet.com>
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20         .text
  21         .code16
  22
  23 #define ASM
  24 #include <arch.h>
  25 #include <multiboot.h>
  26
  27         /*
  28          * Here we assume the kernel is loaded at 1mb
  29          * This boots the kernel
  30          */
  31         .code32
  32     .globl _PageDirectoryStart
  33
  34     .globl _startup_pagedirectory
  35     .globl _lowmem_pagetable
  36     .globl _kernel_pagetable
  37     .globl _hyperspace_pagetable
  38     .globl _apic_pagetable
  39     .globl _kpcr_pagetable
  40     .globl _kuser_pagetable
  41
  42     .globl _PageDirectoryEnd
  43
  44         //
  45         // Boot information structure
  46         //
  47
  48 EXTERN(_reactos_memory_map_descriptor_size)
  49         .long   0
  50
  51 EXTERN(_reactos_memory_map)
  52         .rept   (32 * /*sizeof(memory_map_t)*/24)
  53         .byte   0
  54         .endr
  55
  56 .bss
  57 _PageDirectoryStart:
  58 _startup_pagedirectory:
  59         .fill 4096, 1, 0
  60
  61 _lowmem_pagetable:
  62         .fill 4096, 1, 0
  63
  64 _kernel_pagetable:
  65         .fill 2*4096, 1, 0
  66
  67 _hyperspace_pagetable:
  68         .fill 4096, 1, 0
  69
  70 _apic_pagetable:
  71         .fill 4096, 1, 0
  72
  73 _kpcr_pagetable:
  74         .fill 4096, 1, 0
  75
  76 _kuser_pagetable:
  77         .fill 4096, 1, 0
  78
  79 _PageDirectoryEnd: