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
  41     .globl _startup_pagedirectorytable_pae
  42     .globl _startup_pagedirectory_pae
  43     .globl _lowmem_pagetable_pae
  44     .globl _kernel_pagetable_pae
  45     .globl _hyperspace_pagetable_pae
  46     .globl _apic_pagetable_pae
  47     .globl _kpcr_pagetable_pae
  48
  49     .globl _PageDirectoryEnd
  50
  51         //
  52         // Boot information structure
  53         //
  54
  55 EXTERN(_multiboot_memory_map_descriptor_size)
  56         .long   0
  57
  58 EXTERN(_multiboot_memory_map)
  59         .rept   (32 * /*sizeof(memory_map_t)*/24)
  60         .byte   0
  61         .endr
  62
  63 .bss
  64 _PageDirectoryStart:
  65 _startup_pagedirectory:
  66         .fill 4096, 1, 0
  67
  68 _lowmem_pagetable:
  69         .fill 4096, 1, 0
  70
  71 _kernel_pagetable:
  72         .fill 2*4096, 1, 0
  73
  74 _hyperspace_pagetable:
  75         .fill 2*4096, 1, 0
  76
  77 _apic_pagetable:
  78         .fill 4096, 1, 0
  79
  80 _kpcr_pagetable:
  81         .fill 4096, 1, 0
  82
  83 _startup_pagedirectory_pae:
  84         .fill 4 * 4096, 1, 0
  85
  86 _lowmem_pagetable_pae:
  87         .fill 2 * 4096, 1, 0
  88
  89 _kernel_pagetable_pae:
  90         .fill 3*4096, 1, 0
  91
  92 _hyperspace_pagetable_pae:
  93         .fill 2*4096, 1, 0
  94
  95 _apic_pagetable_pae:
  96         .fill 2*4096, 1, 0
  97
  98 _kpcr_pagetable_pae:
  99         .fill 4*4096, 1, 0
 100
 101 _startup_pagedirectorytable_pae:
 102         .fill 4096, 1, 0
 103 _PageDirectoryEnd: