kern/i386/pc/mmap.c

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2002,2003,2004,2005,2006,2007,2008  Free Software Foundation, Inc.
   4  *
   5  *  GRUB 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  *  GRUB 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 GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <grub/machine/init.h>
  20 #include <grub/machine/memory.h>
  21 #include <grub/err.h>
  22 #include <grub/types.h>
  23
  24 grub_err_t
  25 grub_machine_mmap_iterate (int NESTED_FUNC_ATTR (*hook) (grub_uint64_t, grub_uint64_t, grub_uint32_t))
  26 {
  27   grub_uint32_t cont;
  28   struct grub_machine_mmap_entry *entry
  29     = (struct grub_machine_mmap_entry *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR;
  30
  31   /* Check if grub_get_mmap_entry works.  */
  32   cont = grub_get_mmap_entry (entry, 0);
  33
  34   if (entry->size)
  35     do
  36       {
  37         if (hook (entry->addr, entry->len,
  38                   /* Multiboot mmaps have been defined to match with the E820 definition.
  39                      Therefore, we can just pass type through.  */
  40                   entry->type))
  41           break;
  42
  43         if (! cont)
  44           break;
  45
  46         cont = grub_get_mmap_entry (entry, cont);
  47       }
  48     while (entry->size);
  49   else
  50     {
  51       grub_uint32_t eisa_mmap = grub_get_eisa_mmap ();
  52
  53       if (eisa_mmap)
  54         {
  55           if (hook (0x100000, (eisa_mmap & 0xFFFF) << 10, GRUB_MACHINE_MEMORY_AVAILABLE) == 0)
  56             hook (0x1000000, eisa_mmap & ~0xFFFF, GRUB_MACHINE_MEMORY_AVAILABLE);
  57         }
  58       else
  59         hook (0x100000, grub_get_memsize (1) << 10, GRUB_MACHINE_MEMORY_AVAILABLE);
  60     }
  61
  62   return 0;
  63 }