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