memory.h 1.0 KB

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  1. /*
  2. * linux/include/asm-arm/arch-ixp2000/memory.h
  3. *
  4. * Copyright (c) 2002 Intel Corp.
  5. * Copyright (c) 2003-2004 MontaVista Software, Inc.
  6. *
  7. * This program is free software; you can redistribute it and/or modify it
  8. * under the terms of the GNU General Public License as published by the
  9. * Free Software Foundation; either version 2 of the License, or (at your
  10. * option) any later version.
  11. */
  12. #ifndef __ASM_ARCH_MEMORY_H
  13. #define __ASM_ARCH_MEMORY_H
  14. #define PHYS_OFFSET UL(0x00000000)
  15. /*
  16. * Virtual view <-> DMA view memory address translations
  17. * virt_to_bus: Used to translate the virtual address to an
  18. * address suitable to be passed to set_dma_addr
  19. * bus_to_virt: Used to convert an address for DMA operations
  20. * to an address that the kernel can use.
  21. */
  22. #include <asm/arch/ixp2000-regs.h>
  23. #define __virt_to_bus(v) \
  24. (((__virt_to_phys(v) - 0x0) + (*IXP2000_PCI_SDRAM_BAR & 0xfffffff0)))
  25. #define __bus_to_virt(b) \
  26. __phys_to_virt((((b - (*IXP2000_PCI_SDRAM_BAR & 0xfffffff0)) + 0x0)))
  27. #endif