efiemu/i386/pc/cfgtables.c

   1 /* Register SMBIOS and ACPI tables. */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2009  Free Software Foundation, Inc.
   5  *
   6  *  GRUB is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  GRUB is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <grub/err.h>
  21 #include <grub/efiemu/efiemu.h>
  22 #include <grub/machine/efiemu.h>
  23 #include <grub/misc.h>
  24 #include <grub/mm.h>
  25 #include <grub/acpi.h>
  26
  27 grub_err_t
  28 grub_machine_efiemu_init_tables ()
  29 {
  30   grub_uint8_t *ptr;
  31   void *table;
  32   grub_err_t err;
  33   grub_efi_guid_t smbios = GRUB_EFI_SMBIOS_TABLE_GUID;
  34   grub_efi_guid_t acpi20 = GRUB_EFI_ACPI_20_TABLE_GUID;
  35   grub_efi_guid_t acpi = GRUB_EFI_ACPI_TABLE_GUID;
  36
  37   err = grub_efiemu_unregister_configuration_table (smbios);
  38   if (err)
  39     return err;
  40   err = grub_efiemu_unregister_configuration_table (acpi);
  41   if (err)
  42     return err;
  43   err = grub_efiemu_unregister_configuration_table (acpi20);
  44   if (err)
  45     return err;
  46
  47   table = grub_acpi_get_rsdpv1 ();
  48   if (table)
  49     {
  50       err = grub_efiemu_register_configuration_table (acpi, 0, 0, table);
  51       if (err)
  52         return err;
  53     }
  54   table = grub_acpi_get_rsdpv2 ();
  55   if (table)
  56     {
  57       err = grub_efiemu_register_configuration_table (acpi20, 0, 0, table);
  58       if (err)
  59         return err;
  60     }
  61
  62   for (ptr = (grub_uint8_t *) 0xf0000; ptr < (grub_uint8_t *) 0x100000;
  63        ptr += 16)
  64     if (grub_memcmp (ptr, "_SM_", 4) == 0
  65         && grub_byte_checksum (ptr, *(ptr + 5)) == 0)
  66       break;
  67
  68   if (ptr < (grub_uint8_t *) 0x100000)
  69     {
  70       grub_dprintf ("efiemu", "Registering SMBIOS\n");
  71       if ((err = grub_efiemu_register_configuration_table (smbios, 0, 0, ptr)))
  72         return err;
  73     }
  74
  75   return GRUB_ERR_NONE;
  76 }