Cache updating from multiple sources

A method for updating cached code, comprising:

• in a peripheral device comprising a processor executing software code, a cache memory caching a portion of the software code, and a cache controller communicating with a non-volatile memory (NVM) that stores a replica of the software code, and further communicating over a peripheral bus with one or more hosts that store additional respective replicas of the software code,
• receiving a request from the processor for a segment of the software code;
• when the segment is available in the cache memory, fetching the segment from the cache memory;
• when the segment is unavailable in the cache memory, fetching the segment from one of the hosts;
• and
• serving the fetched segment to the processor.

A computing system, comprising:

• one or more hosts;
• and
• a peripheral device, comprising:
• a processor, to execute software code;
• a cache memory, to cache a portion of the software code;
• a memory interface, to communicate with a non-volatile memory (NVM) that stores a replica of the software code;
• a host interface, to communicate over a peripheral bus with the one or more hosts, wherein the one or more hosts store additional respective replicas of the software code;
• and
• a cache controller, to:
• receive a request from the processor for a segment of the software code;
• when the segment is available in the cache memory, fetch the segment from the cache memory;
• when the segment is unavailable in the cache memory, fetch the segment from one of the hosts, via the host interface;
• and
• serve the fetched segment to the processor.