Patent ID: 7249204

Claim:
A data transfer control device for transferring data among a plurality of nodes that are connected to a bus, the data transfer control device comprising: a page table fetch circuit that operates when a page table exists in the memory of another node, to fetch the page table from the other node; a page table creation circuit that operates when no page table exists in a memory of the other node, to create a virtual page table based on page boundary information; and a transfer execution circuit which executes processing to divide transfer data into packets that do not traverse page boundaries, based on the thus fetched or created page table, and transmit the packets, wherein the page table creation circuit creates a page table having a predetermined number of page table elements between Kth and Lth page boundaries of the memory of the other node, when the start address of transfer data lies between (K−1)th and Kth page boundaries or on the Kth page boundary and when the end address of the transfer data lies between Lth and (L+1)th page boundaries or on the Lth page boundary.