HIGH-SPEED TRANSFER METHOD FOR DATA FROM DEVICE, AND DATA PROCESSOR

摘要

PROBLEM TO BE SOLVED: To secure a continuous physical memory space on an operating system using a virtual memory method to realize high-speed data transfer technology. SOLUTION: A continuous address space larger than a maximum continuous address space used for a virtual memory space of the operating system is allocated to configure a reference memory space inside the physical memory space 15, and data are transferred by DMA transfer from a device connected by an input/output bus thereto by a device driver 11. The reference memory space is memory-mapped and referred to from an application 16 executed on the operating system. COPYRIGHT: (C)2006,JPO&NCIPI