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

   1 /*
   2  * DaVinci memory space definitions
   3  *
   4  * Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
   5  *
   6  * 2007 (c) MontaVista Software, Inc. This file is licensed under
   7  * the terms of the GNU General Public License version 2. This program
   8  * is licensed "as is" without any warranty of any kind, whether express
   9  * or implied.
  10  */
  11 #ifndef __ASM_ARCH_MEMORY_H
  12 #define __ASM_ARCH_MEMORY_H
  13
  14 /**************************************************************************
  15  * Included Files
  16  **************************************************************************/
  17 #include <asm/page.h>
  18 #include <asm/sizes.h>
  19
  20 /**************************************************************************
  21  * Definitions
  22  **************************************************************************/
  23 #define DAVINCI_DDR_BASE    0x80000000
  24
  25 #define PHYS_OFFSET DAVINCI_DDR_BASE
  26
  27 /*
  28  * Increase size of DMA-consistent memory region
  29  */
  30 #define CONSISTENT_DMA_SIZE (14<<20)
  31
  32 #ifndef __ASSEMBLY__
  33 /*
  34  * Restrict DMA-able region to workaround silicon bug.  The bug
  35  * restricts buffers available for DMA to video hardware to be
  36  * below 128M
  37  */
  38 static inline void
  39 __arch_adjust_zones(int node, unsigned long *size, unsigned long *holes)
  40 {
  41         unsigned int sz = (128<<20) >> PAGE_SHIFT;
  42
  43         if (node != 0)
  44                 sz = 0;
  45
  46         size[1] = size[0] - sz;
  47         size[0] = sz;
  48 }
  49
  50 #define arch_adjust_zones(node, zone_size, holes) \
  51         if ((meminfo.bank[0].size >> 20) > 128) __arch_adjust_zones(node, zone_size, holes)
  52
  53 #define ISA_DMA_THRESHOLD       (PHYS_OFFSET + (128<<20) - 1)
  54 #define MAX_DMA_ADDRESS         (PAGE_OFFSET + (128<<20))
  55
  56 #endif
  57
  58 #endif /* __ASM_ARCH_MEMORY_H */