Data processing system and method for generating virtual memory descriptors including pretranslated physical addresses

摘要

A data processing system and method are described for generating virtual memory descriptors which include pretranslated physical addresses. The data processing system has a virtual memory address space and a main memory. The main memory includes a first plurality of physical addresses. A temporary association is established between a region of the main memory and a segment of the virtual memory address space. The region of main memory is addressed utilizing a second plurality of physical addresses. The segment of virtual memory is addressed utilizing a plurality of virtual addresses. In response to the establishment of the temporary association, a virtual memory descriptor is generated and is utilized to address the segment. Each of the plurality of virtual addresses is translated to one of the second plurality of physical addresses. Each translated one of the second plurality of physical addresses is stored in the memory descriptor. The plurality of virtual addresses are translated to the second plurality of physical addresses and stored prior to the virtual memory descriptor being utilized to access the main memory.