| /* |
| * spd.h: Definitions for Serial Presence Detect (SPD) data |
| * stored on SDRAM modules |
| * |
| * Copyright (C) 2005 Digital Design Corporation |
| * |
| * 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. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #ifndef __SPD_H_DEFINED |
| #define __SPD_H_DEFINED |
| |
| // Byte numbers |
| #define SPD_MEMORY_TYPE 2 |
| #define SPD_NUM_ROWS 3 |
| #define SPD_NUM_COLUMNS 4 |
| #define SPD_NUM_DIMM_BANKS 5 |
| #define SPD_MODULE_DATA_WIDTH_LSB 6 |
| #define SPD_MODULE_DATA_WIDTH_MSB 7 |
| #define SPD_MODULE_VOLTAGE 8 |
| #define SPD_MIN_CYCLE_TIME_AT_CAS_MAX 9 |
| #define SPD_DIMM_CONFIG_TYPE 11 |
| #define SPD_REFRESH 12 |
| #define SPD_PRIMARY_DRAM_WIDTH 13 |
| #define SPD_SUPPORTED_BURST_LENGTHS 16 |
| #define SPD_NUM_BANKS_PER_DRAM 17 |
| #define SPD_ACCEPTABLE_CAS_LATENCIES 18 |
| #define SPD_MODULE_ATTRIBUTES 21 |
| #define SPD_MIN_CYCLE_TIME_AT_CAS_REDUCED_05 23 |
| #define SPD_MIN_CYCLE_TIME_AT_CAS_REDUCED_10 25 |
| #define SPD_MIN_ROW_PRECHARGE_TIME 27 |
| #define SPD_MIN_RAS_TO_CAS_DELAY 29 |
| #define SPD_MIN_ACTIVE_TO_PRECHARGE_DELAY 30 |
| #define SPD_ADDRESS_CMD_HOLD 33 |
| |
| |
| // SPD_MEMORY_TYPE values |
| #define MEMORY_TYPE_SDRAM_DDR 7 |
| |
| // SPD_MODULE_VOLTAGE values |
| #define SPD_VOLTAGE_SSTL2 4 |
| |
| // SPD_DIMM_CONFIG_TYPE values |
| #define ERROR_SCHEME_NONE 0 |
| #define ERROR_SCHEME_PARITY 1 |
| #define ERROR_SCHEME_ECC 2 |
| |
| // SPD_ACCEPTABLE_CAS_LATENCIES values |
| #define SPD_CAS_LATENCY_1_0 0x01 |
| #define SPD_CAS_LATENCY_1_5 0x02 |
| #define SPD_CAS_LATENCY_2_0 0x04 |
| #define SPD_CAS_LATENCY_2_5 0x08 |
| #define SPD_CAS_LATENCY_3_0 0x10 |
| #define SPD_CAS_LATENCY_3_5 0x20 |
| #define SPD_CAS_LATENCY_4_0 0x40 |
| |
| // SPD_SUPPORTED_BURST_LENGTHS values |
| #define SPD_BURST_LENGTH_1 1 |
| #define SPD_BURST_LENGTH_2 2 |
| #define SPD_BURST_LENGTH_4 4 |
| #define SPD_BURST_LENGTH_8 8 |
| #define SPD_BURST_LENGTH_PAGE (1<<7) |
| |
| |
| // SPD_MODULE_ATTRIBUTES values |
| #define MODULE_BUFFERED 1 |
| #define MODULE_REGISTERED 2 |
| |
| #endif // __SPD_H_DEFINED |