Invention Grant
US08549255B2 Microprocessor, method and computer program product for direct page prefetch in millicode capable computer system
有权
微处理器,方法和计算机程序产品,用于在具有计算机能力的计算机系统中进行直接页面预取
- Patent Title: Microprocessor, method and computer program product for direct page prefetch in millicode capable computer system
- Patent Title (中): 微处理器,方法和计算机程序产品,用于在具有计算机能力的计算机系统中进行直接页面预取
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Application No.: US12032041Application Date: 2008-02-15
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Publication No.: US08549255B2Publication Date: 2013-10-01
- Inventor: David A. Schroter , Mark S. Farrell , Jennifer Navarro , Chung-Lung Kevin Shum , Charles F. Webb
- Applicant: David A. Schroter , Mark S. Farrell , Jennifer Navarro , Chung-Lung Kevin Shum , Charles F. Webb
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Cantor Colburn LLP
- Agent John Campbell
- Main IPC: G06F12/00
- IPC: G06F12/00

Abstract:
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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