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 #define DA8XX_DDR_BASE          0xc0000000
  25
  26 #if defined(CONFIG_ARCH_DAVINCI_DA8XX) && defined(CONFIG_ARCH_DAVINCI_DMx)
  27 #error Cannot enable DaVinci and DA8XX platforms concurrently
  28 #elif defined(CONFIG_ARCH_DAVINCI_DA8XX)
  29 #define PHYS_OFFSET DA8XX_DDR_BASE
  30 #else
  31 #define PHYS_OFFSET DAVINCI_DDR_BASE
  32 #endif
  33
  34 #define DDR2_SDRCR_OFFSET       0xc
  35 #define DDR2_SRPD_BIT           BIT(23)
  36 #define DDR2_LPMODEN_BIT        BIT(31)
  37
  38 /*
  39  * Increase size of DMA-consistent memory region
  40  */
  41 #define CONSISTENT_DMA_SIZE (14<<20)
  42
  43 #ifndef __ASSEMBLY__
  44 /*
  45  * Restrict DMA-able region to workaround silicon bug.  The bug
  46  * restricts buffers available for DMA to video hardware to be
  47  * below 128M
  48  */
  49 static inline void
  50 __arch_adjust_zones(int node, unsigned long *size, unsigned long *holes)
  51 {
  52         unsigned int sz = (128<<20) >> PAGE_SHIFT;
  53
  54         if (node != 0)
  55                 sz = 0;
  56
  57         size[1] = size[0] - sz;
  58         size[0] = sz;
  59 }
  60
  61 #define arch_adjust_zones(node, zone_size, holes) \
  62         if ((meminfo.bank[0].size >> 20) > 128) __arch_adjust_zones(node, zone_size, holes)
  63
  64 #define ISA_DMA_THRESHOLD       (PHYS_OFFSET + (128<<20) - 1)
  65 #define MAX_DMA_ADDRESS         (PAGE_OFFSET + (128<<20))
  66
  67 #endif
  68
  69 #endif /* __ASM_ARCH_MEMORY_H */