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Intel Intel NetStructure MPCHC5525 System Master Processor Board IPMI Reference Driver, MPCHC5525 3.4.3 Monitoring the IBMU

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22 Intel® NetStructure™ MPCHC5525 System Master Processor Board IPMI Reference Dri ver User’s Guide

Preparing Software for IPMI Usage

3.4.2.4 POST Code

This sensor allows you to read the board’s POST code with the IPMI command “Ge t Sens or

Reading”.

Note: This sensor does not generate event messages.

3.4.3 Monitoring the IBMU

The Intel NetStructure MPCBL5525 System Master Board provides the possibility for the system

management software to obtain information on a possible IBMU problem sourc e (missing SDRs,

memory error, or inaccessible buses). Furthermore, the IBMU guarantees uninterrupted system

operation because the IPMI controller watchdog resets the firmware if the firm ware hangs.

3.4.3.1 Self Test

The IBMU provides a self test that is run every time it is restar ted, i.e. after plugging in the board

containing the IBMU or after a crash. The self test result can be read with the IPMI command “Get

Self Test Results”.

3.4.3.2 IPMI Controller Watchdog

The IPMI controller watchdog constantly monitors the IPMI firmware. If it detects a firmware

crash, it automatically issues a reset of the IPMI controller. The board the IPMI controller is

located on will NOT be reset.

If the BMC is reset and a PM sends a message to the BMC dur ing this reset, the message is lost.

Your system management software therefore must send the command “Re-arm Sensor Events” to

the PM. Then this PM will send the event as long as the critical situation pers ists.

Note: If a PM is reset, your system management application must realize that a reset has occurred and

initialize the IPMI controller. You need to take this into consideration when programming your

system management application. Check e.g. the system time which is 0.00 after a reset.

Contents

Main Page Contents Figures Tables Page Page Intel NetStructure MPCHC5525 System Master Processor Board IPMI Reference Driver Users Guide 7 Using This Guid e Using This Guide 1 1.1 Terms and Definitions Table 1. Terms and Definitions 8Intel Using This Guide 1.2 Other Sources of Information Table 2. Reference Documents Table 1. Terms and Definitions IBMU Functionality 2 2.1 Introduction 2.1.1 Purpose of IPMI 2.1.3 Where Is IPMI-Relevant Information Stored? 2.1.4 Basic Communication Principles 2.1.5 Requirements Page 2.1.6 Available D rivers 2.2 How Does Communication Work? 2.2.1 Communication Within a Chassis 2.2.1.1 Devices with IPMI Controller 2.2.1.2 Nonintelligent Devices 2.2.1.3 On-Board Temperature Sensor 2.2.2 Communication between Chassis Page Page Preparing Software for IPMI Usage 3 3.1 Action Plan 3.2 Notes on Writing Your Own IPMI Driver 3.3 Sensor Data Records 3.3.1 Obtaining SDR Settings 3.4 Notes on Writing System Managem ent Software With your management sof tw a re and For c e -sp e cif ic O E M IP MI co mm ands, you: 3.4.2 Checking CP U Boar d Si gn als 3.4.2.4 POST Code 3.4.3 Monitoring the IBMU 3.4.3.1 Self Test 3.4.3.2 IPMI Controller Watchdog Supported IPMI Commands and BMC/PM Addresses 4 4.1 Standard IPMI Commands 4.2 Global IPM I Co m mands 4.2.1 System Interface Commands 4.2.3 SEL Commands 4.2.4 SDR Commands 4.2.5 FRU Inventory Device Commands Intel NetStructure MPCHC5525 System Master Processor Board IPMI Reference Driver Users Guide 25 4.2.6 Sensor Device Commands All commands can be used in every operation mode. 4.2.7 ICMB Bridge Commands Table 7. Implemented Optional Sensor Device Commands Table 8. Implemented Optional ICMB Bridge Commands (Sheet 1 of 2) 4.3 Force-Specific Commands 4.3.1 BMC/PMChangeRole 4.3.1.2 Response Data 4.3.1.1 Request Data 4.3.2 FlashFileSystemClear 4.3.2.1 Request Data 4.3.2.2 Response Data 4.3.3 GetGeographicalAddress 4.3.3.1 Request Data 4.3.3.2 Response Data 4.4 BMC and PM Addresses Intel NetStructure MPCHC5525 System Master Processor Board IPMI Reference Driver Users Guide 29 Page Customer Support 5