edd.h 1.4 KB

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  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. #include <uapi/linux/edd.h>
  33. #ifndef __ASSEMBLY__
  34. extern struct edd edd;
  35. #endif /*!__ASSEMBLY__ */
  36. #endif /* _LINUX_EDD_H */