READ-AS-X PROPERTY FOR PAGE OF MEMORY ADDRESS SPACE

Abstract: processing circuitry () performs data processing in response to instructions. memory management circuitry () controls access to memory based on page table information capable of associating a given page of memory address space with a read-as-x property indicative that reads to an address in the given page of memory address space should be treated as returning a specified value x. in response to determining, for a read request issued to read a read target value for a read target block of memory address space, that at least part of the read target block corresponds to a page associated with the read-as-x property, the memory management circuitry () controls the specified value x to be returned to the processing circuitry () as at least part of the read target value. this enables large regions of memory address space to be treated as storing a specified value without needing to commit physical memory for those regions.

Inventor(s): Graeme Peter Barnes, Simon John Craske

CPC Classification: G06F12/1009 (Address translation)

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