1 /* SPDX-License-Identifier: GPL-2.0-only */ <<
2 /* 1 /*
3 * linux/include/linux/edd.h 2 * linux/include/linux/edd.h
4 * Copyright (C) 2002, 2003, 2004 Dell Inc. 3 * Copyright (C) 2002, 2003, 2004 Dell Inc.
5 * by Matt Domsch <Matt_Domsch@dell.com> 4 * by Matt Domsch <Matt_Domsch@dell.com>
6 * 5 *
7 * structures and definitions for the int 13h, 6 * structures and definitions for the int 13h, ax={41,48}h
8 * BIOS Enhanced Disk Drive Services 7 * BIOS Enhanced Disk Drive Services
9 * This is based on the T13 group document D15 8 * This is based on the T13 group document D1572 Revision 0 (August 14 2002)
10 * available at http://www.t13.org/docs2002/d1 9 * available at http://www.t13.org/docs2002/d1572r0.pdf. It is
11 * very similar to D1484 Revision 3 http://www 10 * very similar to D1484 Revision 3 http://www.t13.org/docs2002/d1484r3.pdf
12 * 11 *
13 * In a nutshell, arch/{i386,x86_64}/boot/setu 12 * In a nutshell, arch/{i386,x86_64}/boot/setup.S populates a scratch
14 * table in the boot_params that contains a li 13 * table in the boot_params that contains a list of BIOS-enumerated
15 * boot devices. 14 * boot devices.
16 * In arch/{i386,x86_64}/kernel/setup.c, this 15 * In arch/{i386,x86_64}/kernel/setup.c, this information is
17 * transferred into the edd structure, and in 16 * transferred into the edd structure, and in drivers/firmware/edd.c, that
18 * information is used to identify BIOS boot d 17 * information is used to identify BIOS boot disk. The code in setup.S
19 * is very sensitive to the size of these stru 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 *
20 */ 29 */
21 #ifndef _LINUX_EDD_H 30 #ifndef _LINUX_EDD_H
22 #define _LINUX_EDD_H 31 #define _LINUX_EDD_H
23 32
24 #include <uapi/linux/edd.h> 33 #include <uapi/linux/edd.h>
25 34
26 #ifndef __ASSEMBLY__ 35 #ifndef __ASSEMBLY__
27 extern struct edd edd; 36 extern struct edd edd;
28 #endif /*!__ASSEMBLY_ 37 #endif /*!__ASSEMBLY__ */
29 #endif /* _LINUX_EDD_ 38 #endif /* _LINUX_EDD_H */
30 39
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