Embedded Controller Firmware Bit Error Correction
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Solution Overview
Problem
Information handling systems face challenges in detecting and correcting single bit errors in firmware, which can lead to system failure and require costly replacements, as existing security measures prevent execution if even a single bit error is detected in firmware stored in flash memory.
Innovation Solution
A system and method that utilize an embedded controller to compare chipset firmware against expected values, apply error correction checksums to correct single bit errors, and confirm error-free execution before initiating chipset firmware, thereby avoiding unnecessary replacements and providing error indications if corrections fail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If firmware security measures are implemented to detect bit errors, then system security is improved, but system availability deteriorates because execution is prevented when errors are detected
Solution Approach 1:
The patent applies preliminary action by implementing error correction code (ECC) logic that proactively detects and corrects bit errors in firmware images before they are executed. The ECC logic calculates expected ECC values during firmware loading and compares them with stored ECC values, allowing correction of single-bit errors before they can cause system failure or security issues.
Solution Approach 2:
The patent uses an intermediary approach by introducing ECC logic as a mediator between the firmware image and the execution environment. This intermediary layer performs error detection and correction, allowing the system to maintain both security (through error detection) and availability (through error correction) simultaneously.
2Measurement precision
If error detection is implemented in firmware, then error detection capability is improved, but system complexity increases due to additional correction logic
Solution Approach 1:
The patent applies local quality by implementing ECC logic specifically for firmware image validation rather than throughout the entire system. The ECC calculation and comparison is performed locally at the point where firmware is loaded into memory, minimizing the scope of added complexity while maximizing error detection effectiveness.
Solution Approach 2:
The patent uses parameter changes by implementing simple ECC algorithms that calculate checksum values based on firmware image data. The complexity is managed by using well-established ECC parameters and algorithms (such as XOR-based or cyclic redundancy check methods) rather than complex error correction schemes.
3Reliability
If firmware validation is performed before execution, then firmware reliability is improved, but boot time increases due to additional validation steps
Solution Approach 1:
The patent performs ECC validation as a preliminary action during the firmware loading phase, which occurs anyway during system boot. By integrating ECC validation into the existing firmware loading process rather than adding separate validation steps, the time overhead is minimized while ensuring reliability.
Solution Approach 2:
The patent implements efficient ECC validation that can quickly process firmware images. When no errors are detected (the common case), the validation passes rapidly without significant delay. The system rushes through the validation process using optimized algorithms and hardware acceleration where applicable.
Data Source
AI summary
An information handling system embedded controller does not initiate a chipset having secure execution of chipset firmware unless the chipset firmware validates against error correcting checksums inserted into the embedded controller firmware. Comparing checksums calculated from chipset firmware against expected checksum values for the chipset firmware prevents secure chipset initiation failure due to bit errors associated with chipset firmware storage in flash memory.