LXR linux/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
  14struct 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
  54extern const struct mbus_dram_target_info *mv_mbus_dram_info(void);
  55#else
  56static inline const struct mbus_dram_target_info *mv_mbus_dram_info(void)
  57{
  58        return NULL;
  59}
  60#endif
  61
  62int 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);
  65int mvebu_mbus_add_window(const char *devname, phys_addr_t base,
  66                          size_t size);
  67int mvebu_mbus_del_window(phys_addr_t base, size_t size);
  68int 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 */
  73