LXR linux/include/linux/edd.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * linux/include/linux/edd.h
   4 *  Copyright (C) 2002, 2003, 2004 Dell Inc.
   5 *  by Matt Domsch <Matt_Domsch@dell.com>
   6 *
   7 * structures and definitions for the int 13h, ax={41,48}h
   8 * BIOS Enhanced Disk Drive Services
   9 * This is based on the T13 group document D1572 Revision 0 (August 14 2002)
  10 * available at http://www.t13.org/docs2002/d1572r0.pdf.  It is
  11 * very similar to D1484 Revision 3 http://www.t13.org/docs2002/d1484r3.pdf
  12 *
  13 * In a nutshell, arch/{i386,x86_64}/boot/setup.S populates a scratch
  14 * table in the boot_params that contains a list of BIOS-enumerated
  15 * boot devices.
  16 * In arch/{i386,x86_64}/kernel/setup.c, this information is
  17 * transferred into the edd structure, and in drivers/firmware/edd.c, that
  18 * information is used to identify BIOS boot disk.  The code in setup.S
  19 * is very sensitive to the size of these structures.
  20 */
  21#ifndef _LINUX_EDD_H
  22#define _LINUX_EDD_H
  23
  24#include <uapi/linux/edd.h>
  25
  26#ifndef __ASSEMBLY__
  27extern struct edd edd;
  28#endif                          /*!__ASSEMBLY__ */
  29#endif                          /* _LINUX_EDD_H */
  30