Report DDR4 Fault Isolation Address
更新时间： 2026/08/06
在Gitcode上查看源码Report DDR4 Fault Isolation Address
Change History
| openUBMC Version | Revision Date | Description |
|---|---|---|
| 25.06 | 2025/06/26 | Initial draft: add command details |
Basic Information
Function Description
Receives the DDR4 isolation result and address information reported by the BIOS.
Privilege
Command Information
Request Information
| Byte | Data Field |
|---|---|
| NetFn | 30h |
| CMD | 98h |
| 1:3 | Manufacturer ID, LS Byte first. The length is fixed to three bytes. For example, if the vendor ID is 2011 and the corresponding hexadecimal value is 0x0007DB, the first byte is DBh, the second byte is 07h, and the third byte is 00h. |
| 4 | Sub command, Subcommand = 18h, indicating the actual physical memory on the main board If the subcommand is 55h, the reported channel is a logical channel and needs to be converted to a physical channel by the BMC. |
| 5 | [7:2]: 0x00: The isolation is successful. The ADDDC function is not enabled in the BIOS for the 0x01-x4 memory. As a result, the isolation fails. The ADDDC function is enabled in the BIOS for 0x02-x4 memory chips, but the isolation capability is unavailable. 0x03-x8 memory, no isolation capability Others: reserved [1:0]: fault type 0x03: reserved 0x02: hard isolation 0x01: soft isolation 0x00: no fault |
| 6 | fault_type_1: indicates the memory fault isolation type. 0- No fault information to be isolated. 1-Row fault 2-Col fault 3-Bank fault 4- chip fault 5-Rank fault 6- single-address fault Other values: reserved |
| 7:14 | Address: reserved. Address of the faulty memory. This parameter is valid when Byte5[1:0] is 0x01. |
| 15 | CpuId |
| 16 | ChannelId When Sub command is set to 18h, this parameter indicates the physical channel ID. Logical channel ID when Sub command is 55h. |
| 17 | DimmId |
| 18 | RankId. This field is valid when Byte5[1:0] is 2. |
| 19 | SubRank ID. This field is valid when Byte5[1:0] is 2. |
| 20 | Device ID. This field is valid when Byte5[1:0] is 2. |
| 21 | Bank group ID. This field is valid when Byte5[1:0] is set to 2. |
| 22 | Bank ID. This field is valid when Byte5[1:0] is 2. |
| 23:26 | Row address. This field is valid when Byte5[1:0] is 2. |
| 27:30 | Col address. This field is valid when Byte5[1:0] is 2. |
| 31 | Reserved field. The default value is 0. |
Response Information
| Byte | Data Field |
|---|---|
| 1 | Completion Code |
| 2:4 | Manufacturer ID, LS Byte first. The length is fixed to three bytes. For example, if the vendor ID is 2011 and the corresponding hexadecimal value is 0x0007DB, the first byte is DBh, the second byte is 07h, and the third byte is 00h. |
Command Example
The BIOS successfully performs soft isolation on DIMM000.
Request:
bash
ipmicmd -k "0f 00 30 98 db 07 00 55 01 06 01 02 03 04 05 06 07 08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00" smi 0Response:
text
0f 31 00 92 00 db 07 00