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Linux/include/linux/edd.h

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  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 */
 39 

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