发明授权
- 专利标题: Data processor having cache memory
- 专利标题(中): 数据处理器具有高速缓冲存储器
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申请号: US11014885申请日: 2004-12-20
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公开(公告)号: US07240159B2公开(公告)日: 2007-07-03
- 发明人: Takashi Hotta , Toshihiko Kurihara , Shigeya Tanaka , Hideo Sawamoto , Akiyoshi Osumi , Koji Saito , Kotaro Shimamura
- 申请人: Takashi Hotta , Toshihiko Kurihara , Shigeya Tanaka , Hideo Sawamoto , Akiyoshi Osumi , Koji Saito , Kotaro Shimamura
- 申请人地址: JP Tokyo
- 专利权人: Hitachi, Ltd.
- 当前专利权人: Hitachi, Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Mattingly, Stanger, Malur & Brundidge, P.C.
- 优先权: JP5-194482 19930805; JP5-240937 19930928
- 主分类号: G06F12/02
- IPC分类号: G06F12/02
摘要:
A data processor has a first cache memory with a large capacity and one port and a second cache memory with a small capacity and two ports disposed between a main memory and an instruction processing section. Data which is frequently used is stored in the first cache memory and data which is less frequently used is stored in the second cache memory under control of a controller responsive to prefetch instructions. One of the cache memories may be a set associative cache memory composed of a plurality of memory chips each having at least two memory banks and an output part to gain access to data sets consecutively and one at a time within the memory banks. On the basis of an address sent from the instruction processing section, a memory bank is selected, and a data set from the selected memory bank is supplied to the processing section.
公开/授权文献
- US20050102472A1 Data processor having cache memory 公开/授权日:2005-05-12