发明申请
US20090210662A1 MICROPROCESSOR, METHOD AND COMPUTER PROGRAM PRODUCT FOR DIRECT PAGE PREFETCH IN MILLICODE CAPABLE COMPUTER SYSTEM
有权
MICROPROCESSOR,方法和计算机程序产品,用于在MILLICODE可编程计算机系统中直接提取
- 专利标题: MICROPROCESSOR, METHOD AND COMPUTER PROGRAM PRODUCT FOR DIRECT PAGE PREFETCH IN MILLICODE CAPABLE COMPUTER SYSTEM
- 专利标题(中): MICROPROCESSOR,方法和计算机程序产品,用于在MILLICODE可编程计算机系统中直接提取
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申请号: US12032041申请日: 2008-02-15
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公开(公告)号: US20090210662A1公开(公告)日: 2009-08-20
- 发明人: David A. Schroter , Mark S. Farrell , Jennifer Navarro , Chung-Lung Kevin Shum , Charles F. Webb
- 申请人: David A. Schroter , Mark S. Farrell , Jennifer Navarro , Chung-Lung Kevin Shum , Charles F. Webb
- 申请人地址: US NY Armonk
- 专利权人: INTERNATIONAL BUSINESS MACHINES CORPORATION
- 当前专利权人: INTERNATIONAL BUSINESS MACHINES CORPORATION
- 当前专利权人地址: US NY Armonk
- 主分类号: G06F9/30
- IPC分类号: G06F9/30 ; G06F12/08
摘要:
A microprocessor equipped to provide hardware initiated prefetching, includes at least one architecture for performing: issuance of a prefetch instruction; writing of a prefetch address into a prefetch fetch address register (PFAR); attempting a prefetch according to the address; detecting one of a cache miss and a cache hit; and if there is a cache miss, then sending a miss request to a next cache level and attempting cache access in a non-busy cycle; and if there is a cache hit, then incrementing the address in the PFAR and completing the prefetch. A method and a computer program product are provided.
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