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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007 Advanced Micro Devices, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <spd.h>
struct spd_entry {
unsigned int address;
unsigned int data;
};
/* Save space by using a short list of SPD values used by Geode LX Memory init */
/* 128MB */
const struct spd_entry spd_table [] =
{
{SPD_MEMORY_TYPE, 0x07}, /* (Fundamental) memory type */
{SPD_NUM_ROWS, 0x0D}, /* Number of row address bits */
{SPD_NUM_COLUMNS, 0x09}, /* Number of column address bits */
{SPD_NUM_DIMM_BANKS, 0x01}, /* Number of module rows (banks) */
{SPD_MIN_CYCLE_TIME_AT_CAS_MAX, 0x50}, /* SDRAM cycle time (highest CAS latency), RAS access time (tRAC) */
{SPD_REFRESH, 0x82}, /* Refresh rate/type */
{SPD_PRIMARY_SDRAM_WIDTH, 0x08}, /* SDRAM width (primary SDRAM) */
{SPD_NUM_BANKS_PER_SDRAM, 0x04}, /* SDRAM device attributes, number of banks on SDRAM device */
{SPD_ACCEPTABLE_CAS_LATENCIES, 0x1C}, /* SDRAM device attributes, CAS latency */
{SPD_MODULE_ATTRIBUTES, 0x20}, /* SDRAM module attributes */
{SPD_DEVICE_ATTRIBUTES_GENERAL, 0xC0}, /* SDRAM device attributes, general */
{SPD_SDRAM_CYCLE_TIME_2ND, 0x60}, /* SDRAM cycle time (2nd highest CAS latency) */
{SPD_SDRAM_CYCLE_TIME_3RD, 0x75}, /* SDRAM cycle time (3rd highest CAS latency) */
{SPD_MIN_ROW_PRECHARGE_TIME, 0x3C}, /* Minimum row precharge time (Trp) */
{SPD_MIN_ROWACTIVE_TO_ROWACTIVE, 0x28}, /* Minimum row active to row active (Trrd) */
{SPD_MIN_RAS_TO_CAS_DELAY, 0x3C}, /* Minimum RAS to CAS delay (Trcd) */
{SPD_MIN_ACTIVE_TO_PRECHARGE_DELAY, 0x28}, /* Minimum RAS pulse width (Tras) */
{SPD_DENSITY_OF_EACH_ROW_ON_MODULE, 0x20}, /* Density of each row on module */
{SPD_CMD_SIGNAL_INPUT_HOLD_TIME, 0x60}, /* Command and address signal input hold time */
{SPD_tRC, 0x37}, /* SDRAM Device Minimum Active to Active/Auto Refresh Time (tRC) */
{SPD_tRFC, 0x46} /* SDRAM Device Minimum Auto Refresh to Active/Auto Refresh (tRFC) */
};
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