Bus bridge

Abstract

Disclosed is a bus bridge for mutually connecting a memory bus having memories connected thereto and an I/O bus having plural I/O devices connected thereto, which comprises a conversion table in which pairs of entry and physical address are included and which is divided into a fixed part and a refillable part; an address conversion means for converting a logical address supplied from the I/O device to a physical address supplied to the memory, while selectively using the fixed part or the refillable part in accordance with whether the logical address is in address remapping space or in I/O-TBL space; and refilling means for refilling the contents of the refillable part from a mother address conversion table on a memory in case that the logical address is in the I/O-TBL space and the entry corresponding to the logical address does not exist in the refillable part.

Dependencies are inferred from the claim text.