SMI Handler Update Without Platform Reset

The patent segments the SMI handler into multiple versions stored in different regions of SMRAM (first SMI handler region and second SMI handler region). This allows the system to maintain the current handler while storing updates separately, enabling updates without resetting the platform. The segmentation principle resolves the contradiction by allowing concurrent existence of multiple handler versions without requiring exclusive access during updates.

The patent implements preliminary action by storing the updated SMI handler code in the second SMI handler region before actually using it. The update process prepares the new handler in advance in a separate region, then switches to it when needed. This preliminary preparation allows the system to update handlers without interrupting current operations, eliminating the need for platform resets during the update process.

The patent divides the SMI handler functionality into separate regions within SMRAM - a first SMI handler region for the current active handler and a second SMI handler region for updates. This segmentation maintains relative structural simplicity while enabling update capability, as each region contains a complete but independent handler implementation.

The patent introduces dynamic switching capability between different SMI handler versions by modifying the SMI handler selection mechanism. Instead of a static single handler, the system can dynamically switch between the first and second SMI handler regions based on update status and operational requirements, providing adaptability without significant complexity increase.

The patent segments the BIOS update process into two independent phases: (1) downloading and storing the updated BIOS image in the second SMI handler region, and (2) activating the updated BIOS by switching from the first to second region. This segmentation allows the update to be prepared and activated without requiring platform reset, maintaining service availability throughout the process.

The patent enables continuous operation during BIOS updates by maintaining the ability to switch between handler regions without platform reset. The useful action of running the SMI handler continues uninterrupted, while updates are applied in the background. This continuity principle resolves the contradiction by eliminating the platform reset step that would otherwise interrupt service availability.