1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * (c) 2015 Purna Chandra Mandal <purna.mandal@microchip.com> 4 * 5 */ 6 7 #ifndef __MICROCHIP_PIC32_DDR_H 8 #define __MICROCHIP_PIC32_DDR_H 9 10 /* called by dram_init() function */ 11 void ddr2_phy_init(void); 12 void ddr2_ctrl_init(void); 13 phys_size_t ddr2_calculate_size(void); 14 15 /* Maximum number of agents */ 16 #define NUM_AGENTS 5 17 18 /* Board can provide agent specific parameters for arbitration by 19 * filling struct ddr2_arbiter_params for all the agents and 20 * implementing board_get_ddr_arbiter_params() to return the filled 21 * structure. 22 */ 23 struct ddr2_arbiter_params { 24 u32 min_limit; /* min bursts to execute per arbitration */ 25 u32 req_period; /* request period threshold for accepted cmds */ 26 u32 min_cmd_acpt; /* min number of accepted cmds */ 27 }; 28 29 const struct ddr2_arbiter_params *board_get_ddr_arbiter_params(void); 30 31 #endif /* __MICROCHIP_PIC32_DDR_H */ 32