memory.h 1.3 KB

123456789101112131415161718192021222324252627282930313233343536
  1. /*
  2. * linux/include/asm-arm/arch-imx/memory.h
  3. *
  4. * Copyright (C) 1999 ARM Limited
  5. * Copyright (C) 2002 Shane Nay (shane@minirl.com)
  6. *
  7. * This program is free software; you can redistribute it and/or modify
  8. * it under the terms of the GNU General Public License as published by
  9. * the Free Software Foundation; either version 2 of the License, or
  10. * (at your option) any later version.
  11. *
  12. * This program is distributed in the hope that it will be useful,
  13. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15. * GNU General Public License for more details.
  16. *
  17. * You should have received a copy of the GNU General Public License
  18. * along with this program; if not, write to the Free Software
  19. * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20. */
  21. #ifndef __ASM_ARCH_MMU_H
  22. #define __ASM_ARCH_MMU_H
  23. #define PHYS_OFFSET UL(0x08000000)
  24. /*
  25. * Virtual view <-> DMA view memory address translations
  26. * virt_to_bus: Used to translate the virtual address to an
  27. * address suitable to be passed to set_dma_addr
  28. * bus_to_virt: Used to convert an address for DMA operations
  29. * to an address that the kernel can use.
  30. */
  31. #define __virt_to_bus(x) (x - PAGE_OFFSET + PHYS_OFFSET)
  32. #define __bus_to_virt(x) (x - PHYS_OFFSET + PAGE_OFFSET)
  33. #endif