include/asm-arm/arch-ixp2000/memory.h

   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
  13 #ifndef __ASM_ARCH_MEMORY_H
  14 #define __ASM_ARCH_MEMORY_H
  15
  16 #define PHYS_OFFSET     UL(0x00000000)
  17
  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 #include <asm/arch/ixp2000-regs.h>
  26
  27 #define __virt_to_bus(v) \
  28         (((__virt_to_phys(v) - 0x0) + (*IXP2000_PCI_SDRAM_BAR & 0xfffffff0)))
  29
  30 #define __bus_to_virt(b) \
  31         __phys_to_virt((((b - (*IXP2000_PCI_SDRAM_BAR & 0xfffffff0)) + 0x0)))
  32
  33 #endif
  34