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d9523678 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
1da177e4 LT |
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. | |
1da177e4 LT |
20 | */ |
21 | #ifndef _LINUX_EDD_H | |
22 | #define _LINUX_EDD_H | |
23 | ||
607ca46e | 24 | #include <uapi/linux/edd.h> |
1da177e4 LT |
25 | |
26 | #ifndef __ASSEMBLY__ | |
1da177e4 | 27 | extern struct edd edd; |
1da177e4 | 28 | #endif /*!__ASSEMBLY__ */ |
1da177e4 | 29 | #endif /* _LINUX_EDD_H */ |