grub-core/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/misc.h>
  23 #include <grub/mm.h>
  24 #include <grub/acpi.h>
  25
  26 grub_err_t
  27 grub_machine_efiemu_init_tables (void)
  28 {
  29   grub_uint8_t *ptr;
  30   void *table;
  31   grub_err_t err;
  32   grub_efi_guid_t smbios = GRUB_EFI_SMBIOS_TABLE_GUID;
  33   grub_efi_guid_t acpi20 = GRUB_EFI_ACPI_20_TABLE_GUID;
  34   grub_efi_guid_t acpi = GRUB_EFI_ACPI_TABLE_GUID;
  35
  36   err = grub_efiemu_unregister_configuration_table (smbios);
  37   if (err)
  38     return err;
  39   err = grub_efiemu_unregister_configuration_table (acpi);
  40   if (err)
  41     return err;
  42   err = grub_efiemu_unregister_configuration_table (acpi20);
  43   if (err)
  44     return err;
  45
  46   table = grub_acpi_get_rsdpv1 ();
  47   if (table)
  48     {
  49       err = grub_efiemu_register_configuration_table (acpi, 0, 0, table);
  50       if (err)
  51         return err;
  52     }
  53   table = grub_acpi_get_rsdpv2 ();
  54   if (table)
  55     {
  56       err = grub_efiemu_register_configuration_table (acpi20, 0, 0, table);
  57       if (err)
  58         return err;
  59     }
  60
  61   for (ptr = (grub_uint8_t *) 0xf0000; ptr < (grub_uint8_t *) 0x100000;
  62        ptr += 16)
  63     if (grub_memcmp (ptr, "_SM_", 4) == 0
  64         && grub_byte_checksum (ptr, *(ptr + 5)) == 0)
  65       break;
  66
  67   if (ptr < (grub_uint8_t *) 0x100000)
  68     {
  69       grub_dprintf ("efiemu", "Registering SMBIOS\n");
  70       if ((err = grub_efiemu_register_configuration_table (smbios, 0, 0, ptr)))
  71         return err;
  72     }
  73
  74   return GRUB_ERR_NONE;
  75 }