MdePkg/Include/IndustryStandard/SdramSpd.h

/** @file
  This file contains definitions for the SPD fields on an SDRAM.

  Copyright (c) 2007 - 2016, Intel Corporation. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent
**/

#ifndef _SDRAM_SPD_H_
#define _SDRAM_SPD_H_

#include <IndustryStandard/SdramSpdDdr3.h>
#include <IndustryStandard/SdramSpdDdr4.h>
#include <IndustryStandard/SdramSpdLpDdr.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
#define SPD_VAL_DDR3_TYPE    11   ///< DDR3 SDRAM memory
#define SPD_VAL_DDR4_TYPE    12   ///< DDR4 SDRAM memory
#define SPD_VAL_LPDDR3_TYPE  15   ///< LPDDR3 SDRAM memory
#define SPD_VAL_LPDDR4_TYPE  16   ///< LPDDR4 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