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__ 27 extern struct edd edd; 28 #endif /*!__ASSEMBLY__ */ 29 #endif /* _LINUX_EDD_H */ 30
