arch/i386/kernel/acpi.c

   1 /*
   2  *  acpi.c - Linux ACPI arch-specific functions
   3  *
   4  *  Copyright (C) 1999-2000 Andrew Henroid
   5  *
   6  *  This program 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 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program 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 this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 /*
  22  * Changes:
  23  * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 2000/08/31
  24  * - check copy*user return
  25  * - get rid of check_region
  26  * - get rid of verify_area
  27  * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 2000/09/28
  28  * - do proper release on failure in acpi_claim_ioports and acpi_init
  29  * Andrew Grover <andrew.grover@intel.com> - 2000/11/13
  30  * - Took out support for user-level interpreter. ACPI 2.0 changes preclude
  31  *   its maintenance.
  32  */
  33
  34 #include <linux/config.h>
  35 #include <linux/module.h>
  36 #include <linux/init.h>
  37 #include <linux/pm.h>
  38
  39 #define _LINUX
  40 #include <linux/acpi.h>
  41 /* Is there a better way to include this? */
  42 #include <../drivers/acpi/include/acpi.h>
  43
  44 ACPI_PHYSICAL_ADDRESS
  45 acpi_get_rsdp_ptr()
  46 {
  47         ACPI_PHYSICAL_ADDRESS rsdp_phys;
  48
  49         if(ACPI_SUCCESS(acpi_find_root_pointer(&rsdp_phys)))
  50                 return rsdp_phys;
  51         else
  52                 return 0;
  53 }