diff options
Diffstat (limited to 'include/linux/edd.h')
| -rw-r--r-- | include/linux/edd.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/include/linux/edd.h b/include/linux/edd.h new file mode 100644 index 000000000..1c16fbcb8 --- /dev/null +++ b/include/linux/edd.h @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * linux/include/linux/edd.h + * Copyright (C) 2002, 2003, 2004 Dell Inc. + * by Matt Domsch <Matt_Domsch@dell.com> + * + * structures and definitions for the int 13h, ax={41,48}h + * BIOS Enhanced Disk Drive Services + * This is based on the T13 group document D1572 Revision 0 (August 14 2002) + * available at http://www.t13.org/docs2002/d1572r0.pdf. It is + * very similar to D1484 Revision 3 http://www.t13.org/docs2002/d1484r3.pdf + * + * In a nutshell, arch/{i386,x86_64}/boot/setup.S populates a scratch + * table in the boot_params that contains a list of BIOS-enumerated + * boot devices. + * In arch/{i386,x86_64}/kernel/setup.c, this information is + * transferred into the edd structure, and in drivers/firmware/edd.c, that + * information is used to identify BIOS boot disk. The code in setup.S + * is very sensitive to the size of these structures. + */ +#ifndef _LINUX_EDD_H +#define _LINUX_EDD_H + +#include <uapi/linux/edd.h> + +#ifndef __ASSEMBLY__ +extern struct edd edd; +#endif /*!__ASSEMBLY__ */ +#endif /* _LINUX_EDD_H */ |