edd.h 1.1 KB

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  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. #include <uapi/linux/edd.h>
  24. #ifndef __ASSEMBLY__
  25. extern struct edd edd;
  26. #endif /*!__ASSEMBLY__ */
  27. #endif /* _LINUX_EDD_H */