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    • 4. 发明授权
    • Translation lookaside buffer shutdown scheme
    • 翻译后备缓冲区关机方案
    • US5325507A
    • 1994-06-28
    • US19541
    • 1993-02-18
    • Danny L. FreitasCraig C. HansenChristopher Rowen
    • Danny L. FreitasCraig C. HansenChristopher Rowen
    • G06F11/00G06F11/07G06F12/10G06F12/16
    • G06F11/073G06F11/004G06F11/0751G06F12/1045G06F11/076
    • An apparatus for temporarily disabling a translation lookaside buffer in a computer system upon the occurrence of certain predefined system conditions. Such conditions may be of a first type which have been predetermined to indicate a greater risk that two or more virtual addresses stored in the TLB will simultaneously match the incoming virtual address, and/or of a second type in which access to the TLB is not needed. An example of the first type is a reference to an unmapped segment of memory. An example of the second type is the processing of a non-memory-access instruction. The apparatus may further include failsafe circuitry to shut down the TLB if at least a given number of matches occur at any time and for any reason, the given number being greater than 1. The apparatus prevents loss of data or damage to the chip where match comparisons are performed in parallel.
    • 一种用于在发生某些预定义的系统条件时暂时禁用计算机系统中的翻译后备缓冲器的装置。 这样的条件可以是已经被预先确定的第一类型,以表示存储在TLB中的两个或更多个虚拟地址将同时匹配进入的虚拟地址,和/或其中对TLB的访问不是的第二类型的更大的风险 需要的 第一种类型的示例是对未映射的内存段的引用。 第二种类型的示例是非存储器访问指令的处理。 如果至少给定数量的匹配发生在任何时间,并且出于任何原因,给定数量大于1,则该装置还可以包括故障安全电路来关闭TLB。该装置防止丢失数据或损坏芯片,其中匹配 并行执行比较。