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 /* Flags for PCI/PCIe address decoding regions */
  36 #define MVEBU_MBUS_PCI_IO  0x1
  37 #define MVEBU_MBUS_PCI_MEM 0x2
  38 #define MVEBU_MBUS_PCI_WA  0x3
  39
  40 /*
  41  * Magic value that explicits that we don't need a remapping-capable
  42  * address decoding window.
  43  */
  44 #define MVEBU_MBUS_NO_REMAP (0xffffffff)
  45
  46 /* Maximum size of a mbus window name */
  47 #define MVEBU_MBUS_MAX_WINNAME_SZ 32
  48
  49 /*
  50  * The Marvell mbus is to be found only on SOCs from the Orion family
  51  * at the moment.  Provide a dummy stub for other architectures.
  52  */
  53 #ifdef CONFIG_PLAT_ORION
  54 extern const struct mbus_dram_target_info *mv_mbus_dram_info(void);
  55 #else
  56 static inline const struct mbus_dram_target_info *mv_mbus_dram_info(void)
  57 {
  58         return NULL;
  59 }
  60 #endif
  61
  62 int mvebu_mbus_add_window_remap_flags(const char *devname, phys_addr_t base,
  63                                       size_t size, phys_addr_t remap,
  64                                       unsigned int flags);
  65 int mvebu_mbus_add_window(const char *devname, phys_addr_t base,
  66                           size_t size);
  67 int mvebu_mbus_del_window(phys_addr_t base, size_t size);
  68 int mvebu_mbus_init(const char *soc, phys_addr_t mbus_phys_base,
  69                     size_t mbus_size, phys_addr_t sdram_phys_base,
  70                     size_t sdram_size);
  71
  72 #endif /* __LINUX_MBUS_H */