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
  14#include <linux/errno.h>
  15
  16struct resource;
  17
  18struct mbus_dram_target_info
  19{
  20        /*
  21         * The 4-bit MBUS target ID of the DRAM controller.
  22         */
  23        u8              mbus_dram_target_id;
  24
  25        /*
  26         * The base address, size, and MBUS attribute ID for each
  27         * of the possible DRAM chip selects.  Peripherals are
  28         * required to support at least 4 decode windows.
  29         */
  30        int             num_cs;
  31        struct mbus_dram_window {
  32                u8      cs_index;
  33                u8      mbus_attr;
  34                u64     base;
  35                u64     size;
  36        } cs[4];
  37};
  38
  39/* Flags for PCI/PCIe address decoding regions */
  40#define MVEBU_MBUS_PCI_IO  0x1
  41#define MVEBU_MBUS_PCI_MEM 0x2
  42#define MVEBU_MBUS_PCI_WA  0x3
  43
  44/*
  45 * Magic value that explicits that we don't need a remapping-capable
  46 * address decoding window.
  47 */
  48#define MVEBU_MBUS_NO_REMAP (0xffffffff)
  49
  50/* Maximum size of a mbus window name */
  51#define MVEBU_MBUS_MAX_WINNAME_SZ 32
  52
  53/*
  54 * The Marvell mbus is to be found only on SOCs from the Orion family
  55 * at the moment.  Provide a dummy stub for other architectures.
  56 */
  57#ifdef CONFIG_PLAT_ORION
  58extern const struct mbus_dram_target_info *mv_mbus_dram_info(void);
  59extern const struct mbus_dram_target_info *mv_mbus_dram_info_nooverlap(void);
  60int mvebu_mbus_get_io_win_info(phys_addr_t phyaddr, u32 *size, u8 *target,
  61                               u8 *attr);
  62#else
  63static inline const struct mbus_dram_target_info *mv_mbus_dram_info(void)
  64{
  65        return NULL;
  66}
  67static inline const struct mbus_dram_target_info *mv_mbus_dram_info_nooverlap(void)
  68{
  69        return NULL;
  70}
  71static inline int mvebu_mbus_get_io_win_info(phys_addr_t phyaddr, u32 *size,
  72                                             u8 *target, u8 *attr)
  73{
  74        /*
  75         * On all ARM32 MVEBU platforms with MBus support, this stub
  76         * function will not get called. The real function from the
  77         * MBus driver is called instead. ARM64 MVEBU platforms like
  78         * the Armada 3700 could use the mv_xor device driver which calls
  79         * into this function
  80         */
  81        return -EINVAL;
  82}
  83#endif
  84
  85#ifdef CONFIG_MVEBU_MBUS
  86int mvebu_mbus_save_cpu_target(u32 __iomem *store_addr);
  87void mvebu_mbus_get_pcie_mem_aperture(struct resource *res);
  88void mvebu_mbus_get_pcie_io_aperture(struct resource *res);
  89int mvebu_mbus_get_dram_win_info(phys_addr_t phyaddr, u8 *target, u8 *attr);
  90int mvebu_mbus_add_window_remap_by_id(unsigned int target,
  91                                      unsigned int attribute,
  92                                      phys_addr_t base, size_t size,
  93                                      phys_addr_t remap);
  94int mvebu_mbus_add_window_by_id(unsigned int target, unsigned int attribute,
  95                                phys_addr_t base, size_t size);
  96int mvebu_mbus_del_window(phys_addr_t base, size_t size);
  97int mvebu_mbus_init(const char *soc, phys_addr_t mbus_phys_base,
  98                    size_t mbus_size, phys_addr_t sdram_phys_base,
  99                    size_t sdram_size);
 100int mvebu_mbus_dt_init(bool is_coherent);
 101#else
 102static inline int mvebu_mbus_get_dram_win_info(phys_addr_t phyaddr, u8 *target,
 103                                               u8 *attr)
 104{
 105        return -EINVAL;
 106}
 107#endif /* CONFIG_MVEBU_MBUS */
 108
 109#endif /* __LINUX_MBUS_H */
 110