mbus.h (3168B)
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 */