| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 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 */ |