发明授权
US4937736A Memory controller for protected memory with automatic access granting
capability
失效
具有自动访问授权功能的受保护内存的内存控制器
- 专利标题： Memory controller for protected memory with automatic access granting capability
- 专利标题（中）： 具有自动访问授权功能的受保护内存的内存控制器
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申请号： US126529申请日： 1987-11-30
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公开(公告)号： US4937736A公开(公告)日： 1990-06-26
- 发明人: Albert Chang , John Cocke , Mark F. Mergen , Richard R. Oehler
- 申请人： Albert Chang , John Cocke , Mark F. Mergen , Richard R. Oehler
- 申请人地址： 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： NY Armonk
- 主分类号： G06F12/00
- IPC分类号： G06F12/00 ; G06F12/14
摘要：
A method and apparatus for controlling access to data blocks stored by addresses in a memory and concurrently accessible by a plurality of transactions is provided. The method includes the steps of receiving an address of a data block to be accessed by a first transaction, deriving from the address an access table entry corresponding to the data block where the entry includes lock data that governs access to the data block, and providing the access if permitted by the lock data, or providing the access, if not permitted by the lock data, and recording the occurrence of the access in the lock data.