90 lines
2.8 KiB
C
90 lines
2.8 KiB
C
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/*
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* $Header: /home/cvs/BIR/ca-cpu/freebios/src/include/spd.h,v 1.1 2005/07/11 16:03:54 smagnani Exp $
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*
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* spd.h: Definitions for Serial Presence Detect (SPD) data
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* stored on SDRAM modules
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*
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* Copyright (C) 2005 Digital Design Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* $Log: spd.h,v $
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* Revision 1.1 2005/07/11 16:03:54 smagnani
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* Initial revision.
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*
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*
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*/
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#ifndef __SPD_H_DEFINED
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#define __SPD_H_DEFINED
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// Byte numbers
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#define SPD_MEMORY_TYPE 2
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#define SPD_NUM_ROWS 3
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#define SPD_NUM_COLUMNS 4
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#define SPD_NUM_DIMM_BANKS 5
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#define SPD_MODULE_DATA_WIDTH_LSB 6
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#define SPD_MODULE_DATA_WIDTH_MSB 7
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#define SPD_MODULE_VOLTAGE 8
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#define SPD_MIN_CYCLE_TIME_AT_CAS_MAX 9
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#define SPD_DIMM_CONFIG_TYPE 11
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#define SPD_REFRESH 12
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#define SPD_PRIMARY_DRAM_WIDTH 13
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#define SPD_SUPPORTED_BURST_LENGTHS 16
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#define SPD_NUM_BANKS_PER_DRAM 17
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#define SPD_ACCEPTABLE_CAS_LATENCIES 18
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#define SPD_MODULE_ATTRIBUTES 21
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#define SPD_MIN_CYCLE_TIME_AT_CAS_REDUCED_05 23
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#define SPD_MIN_CYCLE_TIME_AT_CAS_REDUCED_10 25
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#define SPD_MIN_ROW_PRECHARGE_TIME 27
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#define SPD_MIN_RAS_TO_CAS_DELAY 29
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#define SPD_MIN_ACTIVE_TO_PRECHARGE_DELAY 30
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#define SPD_ADDRESS_CMD_HOLD 33
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// SPD_MEMORY_TYPE values
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#define MEMORY_TYPE_SDRAM_DDR 7
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// SPD_MODULE_VOLTAGE values
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#define SPD_VOLTAGE_SSTL2 4
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// SPD_DIMM_CONFIG_TYPE values
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#define ERROR_SCHEME_NONE 0
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#define ERROR_SCHEME_PARITY 1
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#define ERROR_SCHEME_ECC 2
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// SPD_ACCEPTABLE_CAS_LATENCIES values
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#define SPD_CAS_LATENCY_1_0 0x01
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#define SPD_CAS_LATENCY_1_5 0x02
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#define SPD_CAS_LATENCY_2_0 0x04
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#define SPD_CAS_LATENCY_2_5 0x08
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#define SPD_CAS_LATENCY_3_0 0x10
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#define SPD_CAS_LATENCY_3_5 0x20
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#define SPD_CAS_LATENCY_4_0 0x40
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// SPD_SUPPORTED_BURST_LENGTHS values
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#define SPD_BURST_LENGTH_1 1
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#define SPD_BURST_LENGTH_2 2
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#define SPD_BURST_LENGTH_4 4
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#define SPD_BURST_LENGTH_8 8
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#define SPD_BURST_LENGTH_PAGE (1<<7)
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// SPD_MODULE_ATTRIBUTES values
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#define MODULE_BUFFERED 1
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#define MODULE_REGISTERED 2
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#endif // __SPD_H_DEFINED
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