kernel2/include/memmap.h

   1 /*
   2     meinOS - A unix-like x86 microkernel operating system
   3     Copyright (C) 2008  Janosch Gräf <janosch.graef@gmx.net>
   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 3 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, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 #ifndef _MEMMAP_H_
  20 #define _MEMMAP_H_
  21
  22 #include <sizes.h>
  23 #include <memphys.h>
  24
  25 // Lower MB
  26 #define IVT_ADDRESS      0x00000
  27 #define IVT_SIZE         0x00200
  28
  29 #define BIOSCODE_ADDRESS 0xC0000
  30 #define BIOSCODE_SIZE    0x40000
  31
  32 // Memory map
  33
  34 #define PHYS_MEMORY memphys_memory          ///< phys memory available
  35 #define PHYS_PAGES  (PHYS_MEMORY/PAGE_SIZE) ///< phys pages available
  36
  37 #define BIOSDATA_ADDRESS   0                                                          ///< virt/phys address of BIOS data
  38 #define BIOSDATA_SIZE      (1*MBYTES)                                                 ///< virt/phys address of BIOS data
  39
  40 #define KERNELCODE_ADDRESS (BIOSDATA_ADDRESS+BIOSDATA_SIZE)                           ///< virt/phys address of kernel code
  41 #define KERNELCODE_SIZE    (2*MBYTES)                                                 ///< virt/phys size of kernel code
  42 /// @todo We don't need 2MB for kernel code, but for loaded programs.
  43
  44 #define STACKDATA_ADDRESS  (KERNELCODE_ADDRESS+KERNELCODE_SIZE)                       ///< virt address of stack data
  45 #define STACKDATA_SIZE     (4*MBYTES)                                                 ///< virt size of stack data
  46
  47 #define KERNELDATA_ADDRESS (STACKDATA_ADDRESS+STACKDATA_SIZE)                         ///< virt address of kernel data
  48 #define KERNELDATA_SIZE    (1*GBYTES-KERNELDATA_ADDRESS)                              ///< virt size of kernel data
  49
  50 #define USERDATA_ADDRESS   (1*GBYTES)                                                 ///< virt address of user data
  51 #define USERDATA_SIZE      (3068*MBYTES-4*KBYTES)                                     ///< virt size of user data
  52
  53 #define KERNELPD_ADDRESS   ((unsigned int)PAGEUP(KERNELCODE_ADDRESS+KERNELCODE_SIZE)) ///< phys address of Kernel PD (and PTs)
  54 #define KERNELPD_SIZE      (3*PAGE_SIZE)                                              ///< phys size of Kernel PD (and PTs)
  55
  56 #define FREEPHYS_ADDRESS   (KERNELPD_ADDRESS+KERNELPD_SIZE)                           ///< phys address of free (phys) pages
  57 #define FREEPHYS_SIZE      (PHYS_MEMORY-FREEPHYS_ADDRESS)                             ///< phys size of free (phys) pages
  58
  59 #define BUFPAGE_ADDRESS    (4092*MBYTES-4*KBYTES)                                     ///< Buffer page for writing/reading physical memory
  60 #define PAGETABLES_ADDRESS (4092*MBYTES)                                              ///< loaded Pagetables
  61 #define PAGEDIR_ADDRESS    (4*GBYTES-4*KBYTES)                                        ///< loaded Pagedir
  62
  63 #endif