| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve security by controlling access to devices. <P>SOLUTION: The computer system including a plurality of bus masters and devices comprises: a control information storage device which stores access control information showing whether each of the plurality of bus masters accessing the devices is accessible to each device or not; a detection part which detects an access request to device by each bus master; an acquisition part which acquires, upon detection of the access request, the access control information of the bus master which outputs the access request from the control information storage device; and first and second address conversion devices which converts the address of the access destination in the access request using the acquired access control information as a filter for performing no address conversion if the information shows the accessibility to the device, and performing address conversion if the information shows inaccessibility to the device. <P>COPYRIGHT: (C)2009,JPO&INPIT |
