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/** @file
This file contains definitions for the SPD fields on an SDRAM.
Copyright (c) 2007 - 2008, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef _SDRAM_SPD_H_
#define _SDRAM_SPD_H_
//
// SDRAM SPD field definitions
//
#define SPD_MEMORY_TYPE 2
#define SPD_SDRAM_ROW_ADDR 3
#define SPD_SDRAM_COL_ADDR 4
#define SPD_SDRAM_MODULE_ROWS 5
#define SPD_SDRAM_MODULE_DATA_WIDTH_LSB 6
#define SPD_SDRAM_MODULE_DATA_WIDTH_MSB 7
#define SPD_SDRAM_ECC_SUPPORT 11
#define SPD_SDRAM_REFRESH 12
#define SPD_SDRAM_WIDTH 13
#define SPD_SDRAM_ERROR_WIDTH 14
#define SPD_SDRAM_BURST_LENGTH 16
#define SPD_SDRAM_NO_OF_BANKS 17
#define SPD_SDRAM_CAS_LATENCY 18
#define SPD_SDRAM_MODULE_ATTR 21
#define SPD_SDRAM_TCLK1_PULSE 9 ///< cycle time for highest cas latency
#define SPD_SDRAM_TAC1_PULSE 10 ///< access time for highest cas latency
#define SPD_SDRAM_TCLK2_PULSE 23 ///< cycle time for 2nd highest cas latency
#define SPD_SDRAM_TAC2_PULSE 24 ///< access time for 2nd highest cas latency
#define SPD_SDRAM_TCLK3_PULSE 25 ///< cycle time for 3rd highest cas latency
#define SPD_SDRAM_TAC3_PULSE 26 ///< access time for 3rd highest cas latency
#define SPD_SDRAM_MIN_PRECHARGE 27
#define SPD_SDRAM_ACTIVE_MIN 28
#define SPD_SDRAM_RAS_CAS 29
#define SPD_SDRAM_RAS_PULSE 30
#define SPD_SDRAM_DENSITY 31
//
// Memory Type Definitions
//
#define SPD_VAL_SDR_TYPE 4 ///< SDR SDRAM memory
#define SPD_VAL_DDR_TYPE 7 ///< DDR SDRAM memory
#define SPD_VAL_DDR2_TYPE 8 ///< DDR2 SDRAM memory
//
// ECC Type Definitions
//
#define SPD_ECC_TYPE_NONE 0x00 ///< No error checking
#define SPD_ECC_TYPE_PARITY 0x01 ///< No error checking
#define SPD_ECC_TYPE_ECC 0x02 ///< Error checking only
//
// Module Attributes (Bit positions)
//
#define SPD_BUFFERED 0x01
#define SPD_REGISTERED 0x02
#endif
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