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 resource;
15
16 struct mbus_dram_target_info
17 {
18 /*
19 * The 4-bit MBUS target ID of the DRAM controller.
20 */
21 u8 mbus_dram_target_id;
22
23 /*
24 * The base address, size, and MBUS attribute ID for each
25 * of the possible DRAM chip selects. Peripherals are
26 * required to support at least 4 decode windows.
27 */
28 int num_cs;
29 struct mbus_dram_window {
30 u8 cs_index;
31 u8 mbus_attr;
32 u32 base;
33 u32 size;
34 } cs[4];
35 };
36
37 /* Flags for PCI/PCIe address decoding regions */
38 #define MVEBU_MBUS_PCI_IO 0x1
39 #define MVEBU_MBUS_PCI_MEM 0x2
40 #define MVEBU_MBUS_PCI_WA 0x3
41
42 /*
43 * Magic value that explicits that we don't need a remapping-capable
44 * address decoding window.
45 */
46 #define MVEBU_MBUS_NO_REMAP (0xffffffff)
47
48 /* Maximum size of a mbus window name */
49 #define MVEBU_MBUS_MAX_WINNAME_SZ 32
50
51 /*
52 * The Marvell mbus is to be found only on SOCs from the Orion family
53 * at the moment. Provide a dummy stub for other architectures.
54 */
55 #ifdef CONFIG_PLAT_ORION
56 extern const struct mbus_dram_target_info *mv_mbus_dram_info(void);
57 extern const struct mbus_dram_target_info *mv_mbus_dram_info_nooverlap(void);
58 #else
mv_mbus_dram_info(void)59 static inline const struct mbus_dram_target_info *mv_mbus_dram_info(void)
60 {
61 return NULL;
62 }
mv_mbus_dram_info_nooverlap(void)63 static inline const struct mbus_dram_target_info *mv_mbus_dram_info_nooverlap(void)
64 {
65 return NULL;
66 }
67 #endif
68
69 int mvebu_mbus_save_cpu_target(u32 *store_addr);
70 void mvebu_mbus_get_pcie_mem_aperture(struct resource *res);
71 void mvebu_mbus_get_pcie_io_aperture(struct resource *res);
72 int mvebu_mbus_add_window_remap_by_id(unsigned int target,
73 unsigned int attribute,
74 phys_addr_t base, size_t size,
75 phys_addr_t remap);
76 int mvebu_mbus_add_window_by_id(unsigned int target, unsigned int attribute,
77 phys_addr_t base, size_t size);
78 int mvebu_mbus_del_window(phys_addr_t base, size_t size);
79 int mvebu_mbus_init(const char *soc, phys_addr_t mbus_phys_base,
80 size_t mbus_size, phys_addr_t sdram_phys_base,
81 size_t sdram_size);
82 int mvebu_mbus_dt_init(bool is_coherent);
83
84 #endif /* __LINUX_MBUS_H */
85