| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120 |
- /*
- * Copyright 2008-2014 Freescale Semiconductor, Inc.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * Version 2 as published by the Free Software Foundation.
- */
- #ifndef DDR2_DIMM_PARAMS_H
- #define DDR2_DIMM_PARAMS_H
- #define EDC_DATA_PARITY 1
- #define EDC_ECC 2
- #define EDC_AC_PARITY 4
- /* Parameters for a DDR dimm computed from the SPD */
- typedef struct dimm_params_s {
- /* DIMM organization parameters */
- char mpart[19]; /* guaranteed null terminated */
- unsigned int n_ranks;
- unsigned long long rank_density;
- unsigned long long capacity;
- unsigned int data_width;
- unsigned int primary_sdram_width;
- unsigned int ec_sdram_width;
- unsigned int registered_dimm;
- unsigned int device_width; /* x4, x8, x16 components */
- /* SDRAM device parameters */
- unsigned int n_row_addr;
- unsigned int n_col_addr;
- unsigned int edc_config; /* 0 = none, 1 = parity, 2 = ECC */
- #ifdef CONFIG_SYS_FSL_DDR4
- unsigned int bank_addr_bits;
- unsigned int bank_group_bits;
- #else
- unsigned int n_banks_per_sdram_device;
- #endif
- unsigned int burst_lengths_bitmask; /* BL=4 bit 2, BL=8 = bit 3 */
- unsigned int row_density;
- /* used in computing base address of DIMMs */
- unsigned long long base_address;
- /* mirrored DIMMs */
- unsigned int mirrored_dimm; /* only for ddr3 */
- /* DIMM timing parameters */
- int mtb_ps; /* medium timebase ps */
- int ftb_10th_ps; /* fine timebase, in 1/10 ps */
- int taa_ps; /* minimum CAS latency time */
- int tfaw_ps; /* four active window delay */
- /*
- * SDRAM clock periods
- * The range for these are 1000-10000 so a short should be sufficient
- */
- int tckmin_x_ps;
- int tckmin_x_minus_1_ps;
- int tckmin_x_minus_2_ps;
- int tckmax_ps;
- /* SPD-defined CAS latencies */
- unsigned int caslat_x;
- unsigned int caslat_x_minus_1;
- unsigned int caslat_x_minus_2;
- unsigned int caslat_lowest_derated; /* Derated CAS latency */
- /* basic timing parameters */
- int trcd_ps;
- int trp_ps;
- int tras_ps;
- #ifdef CONFIG_SYS_FSL_DDR4
- int trfc1_ps;
- int trfc2_ps;
- int trfc4_ps;
- int trrds_ps;
- int trrdl_ps;
- int tccdl_ps;
- #else
- int twr_ps; /* maximum = 63750 ps */
- int trfc_ps; /* max = 255 ns + 256 ns + .75 ns
- = 511750 ps */
- int trrd_ps; /* maximum = 63750 ps */
- int twtr_ps; /* maximum = 63750 ps */
- int trtp_ps; /* byte 38, spd->trtp */
- #endif
- int trc_ps; /* maximum = 254 ns + .75 ns = 254750 ps */
- int refresh_rate_ps;
- int extended_op_srt;
- #if defined(CONFIG_SYS_FSL_DDR1) || defined(CONFIG_SYS_FSL_DDR2)
- int tis_ps; /* byte 32, spd->ca_setup */
- int tih_ps; /* byte 33, spd->ca_hold */
- int tds_ps; /* byte 34, spd->data_setup */
- int tdh_ps; /* byte 35, spd->data_hold */
- int tdqsq_max_ps; /* byte 44, spd->tdqsq */
- int tqhs_ps; /* byte 45, spd->tqhs */
- #endif
- /* DDR3 RDIMM */
- unsigned char rcw[16]; /* Register Control Word 0-15 */
- #ifdef CONFIG_SYS_FSL_DDR4
- unsigned int dq_mapping[18];
- unsigned int dq_mapping_ors;
- #endif
- } dimm_params_t;
- extern unsigned int ddr_compute_dimm_parameters(
- const generic_spd_eeprom_t *spd,
- dimm_params_t *pdimm,
- unsigned int dimm_number);
- #endif
|
