memory.h 1.2 KB

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  1. /*
  2. * include/asm-arm/arch-ixp23xx/memory.h
  3. *
  4. * Copyright (c) 2003-2004 Intel Corp.
  5. *
  6. * This program is free software; you can redistribute it and/or modify it
  7. * under the terms of the GNU General Public License as published by the
  8. * Free Software Foundation; either version 2 of the License, or (at your
  9. * option) any later version.
  10. */
  11. #ifndef __ASM_ARCH_MEMORY_H
  12. #define __ASM_ARCH_MEMORY_H
  13. #include <asm/hardware.h>
  14. /*
  15. * Physical DRAM offset.
  16. */
  17. #define PHYS_OFFSET (0x00000000)
  18. /*
  19. * Virtual view <-> DMA view memory address translations
  20. * virt_to_bus: Used to translate the virtual address to an
  21. * address suitable to be passed to set_dma_addr
  22. * bus_to_virt: Used to convert an address for DMA operations
  23. * to an address that the kernel can use.
  24. */
  25. #ifndef __ASSEMBLY__
  26. #include <asm/mach-types.h>
  27. #define __virt_to_bus(v) \
  28. ({ unsigned int ret; \
  29. ret = ((__virt_to_phys(v) - 0x00000000) + \
  30. (*((volatile int *)IXP23XX_PCI_SDRAM_BAR) & 0xfffffff0)); \
  31. ret; })
  32. #define __bus_to_virt(b) \
  33. ({ unsigned int data; \
  34. data = *((volatile int *)IXP23XX_PCI_SDRAM_BAR); \
  35. __phys_to_virt((((b - (data & 0xfffffff0)) + 0x00000000))); })
  36. #define arch_is_coherent() 1
  37. #endif
  38. #endif