include/linux/edd.h

   1 /*
   2  * linux/include/linux/edd.h
   3  *  Copyright (C) 2002, 2003, 2004 Dell Inc.
   4  *  by Matt Domsch <Matt_Domsch@dell.com>
   5  *
   6  * structures and definitions for the int 13h, ax={41,48}h
   7  * BIOS Enhanced Disk Drive Services
   8  * This is based on the T13 group document D1572 Revision 0 (August 14 2002)
   9  * available at http://www.t13.org/docs2002/d1572r0.pdf.  It is
  10  * very similar to D1484 Revision 3 http://www.t13.org/docs2002/d1484r3.pdf
  11  *
  12  * In a nutshell, arch/{i386,x86_64}/boot/setup.S populates a scratch
  13  * table in the boot_params that contains a list of BIOS-enumerated
  14  * boot devices.
  15  * In arch/{i386,x86_64}/kernel/setup.c, this information is
  16  * transferred into the edd structure, and in drivers/firmware/edd.c, that
  17  * information is used to identify BIOS boot disk.  The code in setup.S
  18  * is very sensitive to the size of these structures.
  19  *
  20  * This program is free software; you can redistribute it and/or modify
  21  * it under the terms of the GNU General Public License v2.0 as published by
  22  * the Free Software Foundation
  23  *
  24  * This program is distributed in the hope that it will be useful,
  25  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  26  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27  * GNU General Public License for more details.
  28  *
  29  */
  30 #ifndef _LINUX_EDD_H
  31 #define _LINUX_EDD_H
  32
  33 #include <uapi/linux/edd.h>
  34
  35 #ifndef __ASSEMBLY__
  36 extern struct edd edd;
  37 #endif                          /*!__ASSEMBLY__ */
  38 #endif                          /* _LINUX_EDD_H */