| Stefan Reinauer | eca92fb | 2006-08-23 14:28:37 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * spd.h: Definitions for Serial Presence Detect (SPD) data |
| 3 | * stored on SDRAM modules |
| 4 | * |
| 5 | * Copyright (C) 2005 Digital Design Corporation |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | #ifndef __SPD_H_DEFINED |
| 23 | #define __SPD_H_DEFINED |
| 24 | |
| 25 | // Byte numbers |
| 26 | #define SPD_MEMORY_TYPE 2 |
| 27 | #define SPD_NUM_ROWS 3 |
| 28 | #define SPD_NUM_COLUMNS 4 |
| 29 | #define SPD_NUM_DIMM_BANKS 5 |
| 30 | #define SPD_MODULE_DATA_WIDTH_LSB 6 |
| 31 | #define SPD_MODULE_DATA_WIDTH_MSB 7 |
| 32 | #define SPD_MODULE_VOLTAGE 8 |
| 33 | #define SPD_MIN_CYCLE_TIME_AT_CAS_MAX 9 |
| 34 | #define SPD_DIMM_CONFIG_TYPE 11 |
| 35 | #define SPD_REFRESH 12 |
| 36 | #define SPD_PRIMARY_DRAM_WIDTH 13 |
| 37 | #define SPD_SUPPORTED_BURST_LENGTHS 16 |
| 38 | #define SPD_NUM_BANKS_PER_DRAM 17 |
| 39 | #define SPD_ACCEPTABLE_CAS_LATENCIES 18 |
| 40 | #define SPD_MODULE_ATTRIBUTES 21 |
| 41 | #define SPD_MIN_CYCLE_TIME_AT_CAS_REDUCED_05 23 |
| 42 | #define SPD_MIN_CYCLE_TIME_AT_CAS_REDUCED_10 25 |
| 43 | #define SPD_MIN_ROW_PRECHARGE_TIME 27 |
| 44 | #define SPD_MIN_RAS_TO_CAS_DELAY 29 |
| 45 | #define SPD_MIN_ACTIVE_TO_PRECHARGE_DELAY 30 |
| 46 | #define SPD_ADDRESS_CMD_HOLD 33 |
| 47 | |
| 48 | |
| 49 | // SPD_MEMORY_TYPE values |
| 50 | #define MEMORY_TYPE_SDRAM_DDR 7 |
| 51 | |
| 52 | // SPD_MODULE_VOLTAGE values |
| 53 | #define SPD_VOLTAGE_SSTL2 4 |
| 54 | |
| 55 | // SPD_DIMM_CONFIG_TYPE values |
| 56 | #define ERROR_SCHEME_NONE 0 |
| 57 | #define ERROR_SCHEME_PARITY 1 |
| 58 | #define ERROR_SCHEME_ECC 2 |
| 59 | |
| 60 | // SPD_ACCEPTABLE_CAS_LATENCIES values |
| 61 | #define SPD_CAS_LATENCY_1_0 0x01 |
| 62 | #define SPD_CAS_LATENCY_1_5 0x02 |
| 63 | #define SPD_CAS_LATENCY_2_0 0x04 |
| 64 | #define SPD_CAS_LATENCY_2_5 0x08 |
| 65 | #define SPD_CAS_LATENCY_3_0 0x10 |
| 66 | #define SPD_CAS_LATENCY_3_5 0x20 |
| 67 | #define SPD_CAS_LATENCY_4_0 0x40 |
| 68 | |
| 69 | // SPD_SUPPORTED_BURST_LENGTHS values |
| 70 | #define SPD_BURST_LENGTH_1 1 |
| 71 | #define SPD_BURST_LENGTH_2 2 |
| 72 | #define SPD_BURST_LENGTH_4 4 |
| 73 | #define SPD_BURST_LENGTH_8 8 |
| 74 | #define SPD_BURST_LENGTH_PAGE (1<<7) |
| 75 | |
| 76 | |
| 77 | // SPD_MODULE_ATTRIBUTES values |
| 78 | #define MODULE_BUFFERED 1 |
| 79 | #define MODULE_REGISTERED 2 |
| 80 | |
| 81 | #endif // __SPD_H_DEFINED |