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Enabled registered DIMMs using data from SPD. RDIMMs have registers which need to be configured before using. The register configuration words are stored in SPD byte 60~116 (JEDEC standard No.21-C). Software should read those RCWs and put into DDR controller before initialization. Signed-off-by: York Sun <yorksun@freescale.com>
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/*
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* Copyright 2008 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* Version 2 as published by the Free Software Foundation.
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*/
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#ifndef COMMON_TIMING_PARAMS_H
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#define COMMON_TIMING_PARAMS_H
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typedef struct {
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/* parameters to constrict */
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unsigned int tCKmin_X_ps;
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unsigned int tCKmax_ps;
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unsigned int tCKmax_max_ps;
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unsigned int tRCD_ps;
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unsigned int tRP_ps;
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unsigned int tRAS_ps;
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unsigned int tWR_ps; /* maximum = 63750 ps */
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unsigned int tWTR_ps; /* maximum = 63750 ps */
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unsigned int tRFC_ps; /* maximum = 255 ns + 256 ns + .75 ns
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= 511750 ps */
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unsigned int tRRD_ps; /* maximum = 63750 ps */
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unsigned int tRC_ps; /* maximum = 254 ns + .75 ns = 254750 ps */
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unsigned int refresh_rate_ps;
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unsigned int tIS_ps; /* byte 32, spd->ca_setup */
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unsigned int tIH_ps; /* byte 33, spd->ca_hold */
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unsigned int tDS_ps; /* byte 34, spd->data_setup */
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unsigned int tDH_ps; /* byte 35, spd->data_hold */
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unsigned int tRTP_ps; /* byte 38, spd->trtp */
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unsigned int tDQSQ_max_ps; /* byte 44, spd->tdqsq */
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unsigned int tQHS_ps; /* byte 45, spd->tqhs */
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unsigned int ndimms_present;
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unsigned int lowest_common_SPD_caslat;
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unsigned int highest_common_derated_caslat;
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unsigned int additive_latency;
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unsigned int all_DIMMs_burst_lengths_bitmask;
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unsigned int all_DIMMs_registered;
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unsigned int all_DIMMs_unbuffered;
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unsigned int all_DIMMs_ECC_capable;
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unsigned long long total_mem;
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unsigned long long base_address;
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/* DDR3 RDIMM */
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unsigned char rcw[16]; /* Register Control Word 0-15 */
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} common_timing_params_t;
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#endif
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