uClibc_page.h 1.2 KB

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  1. /* Copyright (C) 2004 Erik Andersen
  2. *
  3. * This library is free software; you can redistribute it and/or
  4. * modify it under the terms of the GNU Lesser General Public
  5. * License as published by the Free Software Foundation; either
  6. * version 2.1 of the License, or (at your option) any later version.
  7. *
  8. * The GNU C Library is distributed in the hope that it will be useful,
  9. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. * Lesser General Public License for more details.
  12. *
  13. * You should have received a copy of the GNU Lesser General Public
  14. * License along with the GNU C Library; see the file COPYING.LIB. If
  15. * not, see <http://www.gnu.org/licenses/>.
  16. */
  17. /* Supply an architecture specific value for PAGE_SIZE and friends. */
  18. #ifndef _UCLIBC_PAGE_H
  19. #define _UCLIBC_PAGE_H
  20. /* PAGE_SHIFT determines the page size -- in this case 4096 */
  21. #define PAGE_SHIFT 12
  22. #define PAGE_SIZE (1UL << PAGE_SHIFT)
  23. #define PAGE_MASK (~(PAGE_SIZE-1))
  24. /* Some architectures always use 12 as page shift for mmap2() eventhough the
  25. * real PAGE_SHIFT != 12. Other architectures use the same value as
  26. * PAGE_SHIFT...
  27. */
  28. #define MMAP2_PAGE_SHIFT PAGE_SHIFT
  29. #endif /* _UCLIBC_PAGE_H */