commands/efi/acpi.c

   1 /* acpi.c - get 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/acpi.h>
  21 #include <grub/misc.h>
  22 #include <grub/efi/efi.h>
  23 #include <grub/efi/api.h>
  24
  25 struct grub_acpi_rsdp_v10 *
  26 grub_machine_acpi_get_rsdpv1 (void)
  27 {
  28   unsigned i;
  29   static grub_efi_guid_t acpi_guid = GRUB_EFI_ACPI_TABLE_GUID;
  30
  31   for (i = 0; i < grub_efi_system_table->num_table_entries; i++)
  32     {
  33       grub_efi_guid_t *guid =
  34         &grub_efi_system_table->configuration_table[i].vendor_guid;
  35
  36       if (! grub_memcmp (guid, &acpi_guid, sizeof (grub_efi_guid_t)))
  37         return (struct grub_acpi_rsdp_v10 *)
  38           grub_efi_system_table->configuration_table[i].vendor_table;
  39     }
  40   return 0;
  41 }
  42
  43 struct grub_acpi_rsdp_v20 *
  44 grub_machine_acpi_get_rsdpv2 (void)
  45 {
  46   unsigned i;
  47   static grub_efi_guid_t acpi20_guid = GRUB_EFI_ACPI_20_TABLE_GUID;
  48
  49   for (i = 0; i < grub_efi_system_table->num_table_entries; i++)
  50     {
  51       grub_efi_guid_t *guid =
  52         &grub_efi_system_table->configuration_table[i].vendor_guid;
  53
  54       if (! grub_memcmp (guid, &acpi20_guid, sizeof (grub_efi_guid_t)))
  55         return (struct grub_acpi_rsdp_v20 *)
  56           grub_efi_system_table->configuration_table[i].vendor_table;
  57     }
  58   return 0;
  59 }