1 /*++ 2 3 Copyright (c) 2007, Intel Corporation. All rights reserved.<BR> 4 This program and the accompanying materials 5 are licensed and made available under the terms and conditions of the BSD License 6 which accompanies this distribution. The full text of the license may be found at 7 http://opensource.org/licenses/bsd-license.php 8 9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 11 12 Module Name: 13 14 SdramSpd.h 15 16 Abstract: 17 18 This file contains definitions for the SPD fields on an SDRAM. 19 20 --*/ 21 22 #ifndef _SDRAM_SPD_H 23 #define _SDRAM_SPD_H 24 25 // 26 // SDRAM SPD field definitions 27 // 28 #define SPD_MEMORY_TYPE 2 29 #define SPD_SDRAM_ROW_ADDR 3 30 #define SPD_SDRAM_COL_ADDR 4 31 #define SPD_SDRAM_MODULE_ROWS 5 32 #define SPD_SDRAM_MODULE_DATA_WIDTH_LSB 6 33 #define SPD_SDRAM_MODULE_DATA_WIDTH_MSB 7 34 #define SPD_SDRAM_ECC_SUPPORT 11 35 #define SPD_SDRAM_REFRESH 12 36 #define SPD_SDRAM_WIDTH 13 37 #define SPD_SDRAM_ERROR_WIDTH 14 38 #define SPD_SDRAM_BURST_LENGTH 16 39 #define SPD_SDRAM_NO_OF_BANKS 17 40 #define SPD_SDRAM_CAS_LATENCY 18 41 #define SPD_SDRAM_MODULE_ATTR 21 42 43 #define SPD_SDRAM_TCLK1_PULSE 9 // cycle time for highest cas latency 44 #define SPD_SDRAM_TAC1_PULSE 10 // access time for highest cas latency 45 #define SPD_SDRAM_TCLK2_PULSE 23 // cycle time for 2nd highest cas latency 46 #define SPD_SDRAM_TAC2_PULSE 24 // access time for 2nd highest cas latency 47 #define SPD_SDRAM_TCLK3_PULSE 25 // cycle time for 3rd highest cas latency 48 #define SPD_SDRAM_TAC3_PULSE 26 // access time for 3rd highest cas latency 49 #define SPD_SDRAM_MIN_PRECHARGE 27 50 #define SPD_SDRAM_ACTIVE_MIN 28 51 #define SPD_SDRAM_RAS_CAS 29 52 #define SPD_SDRAM_RAS_PULSE 30 53 #define SPD_SDRAM_DENSITY 31 54 55 // 56 // Memory Type Definitions 57 // 58 #define SPD_VAL_SDR_TYPE 4 // SDR SDRAM memory 59 #define SPD_VAL_DDR_TYPE 7 // DDR SDRAM memory 60 #define SPD_VAL_DDR2_TYPE 8 // DDR2 SDRAM memory 61 // 62 // ECC Type Definitions 63 // 64 #define SPD_ECC_TYPE_NONE 0x00 // No error checking 65 #define SPD_ECC_TYPE_PARITY 0x01 // No error checking 66 #define SPD_ECC_TYPE_ECC 0x02 // Error checking only 67 // 68 // Module Attributes (Bit positions) 69 // 70 #define SPD_BUFFERED 0x01 71 #define SPD_REGISTERED 0x02 72 73 #endif 74