include/linux/mbus.h

   1 /*
   2  * Marvell MBUS common definitions.
   3  *
   4  * Copyright (C) 2008 Marvell Semiconductor
   5  *
   6  * This file is licensed under the terms of the GNU General Public
   7  * License version 2.  This program is licensed "as is" without any
   8  * warranty of any kind, whether express or implied.
   9  */
  10
  11 #ifndef __LINUX_MBUS_H
  12 #define __LINUX_MBUS_H
  13
  14 struct mbus_dram_target_info
  15 {
  16         /*
  17          * The 4-bit MBUS target ID of the DRAM controller.
  18          */
  19         u8              mbus_dram_target_id;
  20
  21         /*
  22          * The base address, size, and MBUS attribute ID for each
  23          * of the possible DRAM chip selects.  Peripherals are
  24          * required to support at least 4 decode windows.
  25          */
  26         int             num_cs;
  27         struct mbus_dram_window {
  28                 u8      cs_index;
  29                 u8      mbus_attr;
  30                 u32     base;
  31                 u32     size;
  32         } cs[4];
  33 };
  34
  35 /*
  36  * The Marvell mbus is to be found only on SOCs from the Orion family
  37  * at the moment.  Provide a dummy stub for other architectures.
  38  */
  39 #ifdef CONFIG_PLAT_ORION
  40 extern const struct mbus_dram_target_info *mv_mbus_dram_info(void);
  41 #else
  42 static inline const struct mbus_dram_target_info *mv_mbus_dram_info(void)
  43 {
  44         return NULL;
  45 }
  46 #endif
  47 #endif