mirror of
https://github.com/memtest86plus/memtest86plus.git
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Sam Demeulemeester
ced9529bea
* Initial commit for DDR5 Temperature report * Change smbus.h to i2c_x86.h * Change I2C includes defines name to avoid conflict * Add dummy get_ram_temp() function on LA64 * Add menu option for RAM/DDR5 Temperature polling
75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
#ifndef _SPD_H_
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#define _SPD_H_
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/**
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* SPDX-License-Identifier: GPL-2.0
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*
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* \file
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*
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* Provides access to SPD parsing and printing functions.
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*
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* Copyright (C) 2004-2025 Sam Demeulemeester.
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*/
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#define MAX_SPD_SLOT 8
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#define SPD_SKU_LEN 32
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/* DDR5 SPD Hub Configuration Registers */
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#define SPD5_HUB_ID_MSB 0x00 // MR0 - Device Type MSB
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#define SPD5_HUB_ID_LSB 0x01 // MR1 - Device Type LSB (0x18 = w/ Temp Sensor)
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#define SPD5_HUB_CAP 0x05 // MR5 - Device Capability (Bit 1 = Temp Sensor Support)
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#define SPD5_HUB_I2C_CONF 0x0B // MR11 - I²C Legacy Mode Device Configuration
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#define SPD5_HUB_CONF 0x12 // MR18 - General Device Configuration
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#define SPD5_HUB_TS_CONF 0x1A // MR26 - Temperature Sensor Configuration (Bit 0 = 1 for Disable)
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#define SPD5_HUB_TS_RES 0x24 // MR36 - TS Resolution (from 9- to 12-bit)
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#define SPD5_HUB_STATUS 0x30 // MR48 - Device Status
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#define SPD5_HUB_TS_LSB 0x31 // MR49 - TS Current Sensed Temperature - Low Byte
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#define SPD5_HUB_TS_MSB 0x32 // MR50 - TS Current Sensed Temperature - High Byte
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#define SPD5_HUB_TS_STATUS 0x33 // MR51 - Temperature Sensor Status
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typedef struct spd_infos {
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bool isValid;
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uint8_t slot_num;
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uint16_t jedec_code;
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uint32_t module_size;
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char *type;
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char sku[SPD_SKU_LEN + 1];
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uint8_t XMP;
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uint16_t freq;
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bool hasECC;
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bool hasTempSensor;
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uint8_t fab_year;
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uint8_t fab_week;
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uint16_t tCL;
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uint8_t tCL_dec;
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uint16_t tRCD;
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uint16_t tRP;
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uint16_t tRAS;
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uint16_t tRC;
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} spd_info;
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typedef struct ram_infos {
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uint16_t freq;
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uint16_t tCL;
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uint8_t tCL_dec;
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uint16_t tRCD;
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uint16_t tRP;
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uint16_t tRAS;
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char *type;
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} ram_info_t;
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typedef struct {
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uint8_t slot_idx;
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uint8_t display_idx;
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bool isPopulated;
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bool hasTempSensor;
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} ram_slot_info_t;
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extern ram_info_t ram;
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extern ram_slot_info_t ram_slot_info[MAX_SPD_SLOT];
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void print_spdi(spd_info spdi, uint8_t lidx);
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void parse_spd(spd_info *spdi, uint8_t slot_idx);
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#endif // SPD_H
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