cache.h 1.1 KB

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  1. /*
  2. * Copyright (C) 2012 ARM Ltd.
  3. *
  4. * This program is free software; you can redistribute it and/or modify
  5. * it under the terms of the GNU General Public License version 2 as
  6. * published by the Free Software Foundation.
  7. *
  8. * This program 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
  11. * GNU General Public License for more details.
  12. *
  13. * You should have received a copy of the GNU General Public License
  14. * along with this program. If not, see <http://www.gnu.org/licenses/>.
  15. */
  16. #ifndef __ASM_CACHE_H
  17. #define __ASM_CACHE_H
  18. #define L1_CACHE_SHIFT 6
  19. #define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
  20. /*
  21. * Memory returned by kmalloc() may be used for DMA, so we must make
  22. * sure that all such allocations are cache aligned. Otherwise,
  23. * unrelated code may cause parts of the buffer to be read into the
  24. * cache before the transfer is done, causing old data to be seen by
  25. * the CPU.
  26. */
  27. #define ARCH_DMA_MINALIGN L1_CACHE_BYTES
  28. #define ARCH_SLAB_MINALIGN 8
  29. #endif