arch/arm/mach-pxa/include/mach/memory.h

   1 /*
   2  *  arch/arm/mach-pxa/include/mach/memory.h
   3  *
   4  * Author:      Nicolas Pitre
   5  * Copyright:   (C) 2001 MontaVista Software Inc.
   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 version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #ifndef __ASM_ARCH_MEMORY_H
  13 #define __ASM_ARCH_MEMORY_H
  14
  15 /*
  16  * Physical DRAM offset.
  17  */
  18 #define PHYS_OFFSET     UL(0xa0000000)
  19
  20 /*
  21  * Virtual view <-> DMA view memory address translations
  22  * virt_to_bus: Used to translate the virtual address to an
  23  *              address suitable to be passed to set_dma_addr
  24  * bus_to_virt: Used to convert an address for DMA operations
  25  *              to an address that the kernel can use.
  26  */
  27 #define __virt_to_bus(x)         __virt_to_phys(x)
  28 #define __bus_to_virt(x)         __phys_to_virt(x)
  29
  30 /*
  31  * The nodes are matched with the physical SDRAM banks as follows:
  32  *
  33  *      node 0:  0xa0000000-0xa3ffffff  -->  0xc0000000-0xc3ffffff
  34  *      node 1:  0xa4000000-0xa7ffffff  -->  0xc4000000-0xc7ffffff
  35  *      node 2:  0xa8000000-0xabffffff  -->  0xc8000000-0xcbffffff
  36  *      node 3:  0xac000000-0xafffffff  -->  0xcc000000-0xcfffffff
  37  *
  38  * This needs a node mem size of 26 bits.
  39  */
  40 #define NODE_MEM_SIZE_BITS      26
  41
  42 #if !defined(__ASSEMBLY__) && defined(CONFIG_MACH_ARMCORE) && defined(CONFIG_PCI)
  43 void cmx270_pci_adjust_zones(int node, unsigned long *size,
  44                              unsigned long *holes);
  45
  46 #define arch_adjust_zones(node, size, holes) \
  47         cmx270_pci_adjust_zones(node, size, holes)
  48
  49 #define ISA_DMA_THRESHOLD       (PHYS_OFFSET + SZ_64M - 1)
  50 #endif
  51
  52 #endif