iopl.c 1.1 KB

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  1. /* Copyright (C) 1998, 1999 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. Contributed by Phil Blundell, based on the Alpha version by
  4. David Mosberger.
  5. The GNU C Library is free software; you can redistribute it and/or
  6. modify it under the terms of the GNU Lesser General Public
  7. License as published by the Free Software Foundation; either
  8. version 2.1 of the License, or (at your option) any later version.
  9. The GNU C Library is distributed in the hope that it will be useful,
  10. but WITHOUT ANY WARRANTY; without even the implied warranty of
  11. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12. Lesser General Public License for more details.
  13. You should have received a copy of the GNU Lesser General Public
  14. License along with the GNU C Library; if not, see
  15. <http://www.gnu.org/licenses/>. */
  16. #include <sys/io.h>
  17. #include <errno.h>
  18. #define MAX_PORT 0x10000
  19. int iopl(int level)
  20. {
  21. if (level > 3) {
  22. __set_errno(EINVAL);
  23. return -1;
  24. }
  25. if (level)
  26. return ioperm(0, MAX_PORT, 1);
  27. return 0;
  28. }