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    • 41. 发明授权
    • Remapping of inoperable memory blocks
    • 重新映射不可操作的内存块
    • US09092357B2
    • 2015-07-28
    • US12915025
    • 2010-10-29
    • John D. DavisKarin StraussDouglas C. Burger
    • John D. DavisKarin StraussDouglas C. Burger
    • G06F13/00G06F13/28G06F12/10G06F12/02G11C13/00G11C29/00
    • G06F12/1027G06F12/0292G06F12/1009G06F2212/1044G06F2212/2024G11C13/0004G11C13/0035G11C29/76
    • Inoperable phase change memory (PCM) blocks in a PCM device are remapped to one or more operable PCM blocks, e.g. by maintaining an inoperable block table that includes an entry for each inoperable PCM block and an address of a remapped PCM block. Alternatively, the PCM blocks may be remapped by storing the address of the remapped block in the block itself, and setting a remapping bit that indicate the block has been remapped. Where the remapping is performed by a processor, an inoperable block bit may be set in a translation look aside buffer that indicates whether a virtual memory page is associated with an inoperable or remapped PCM block. When a request to access a virtual memory page is received, the processor references the inoperable block bit associated with the virtual memory page to determine whether to check for remapped PCM blocks in the inoperable block table.
    • PCM设备中的不可操作的相变存储器(PCM)块被重新映射到一个或多个可操作的PCM块,例如。 通过维护不可操作的块表,其包括每个不可操作的PCM块的条目和重新映射的PCM块的地址。 或者,可以通过将重映射块的地址存储在块本身中来重新映射PCM块,并且设置指示块的重映射比特已被重新映射。 在由处理器执行重新映射的情况下,可以在转换旁边的缓冲器中设置不可操作的块位,缓冲器指示虚拟存储器页是否与不可操作或重新映射的PCM块相关联。 当接收到访问虚拟存储器页面的请求时,处理器引用与虚拟存储器页面相关联的不可操作块位,以确定是否检查不可操作块表中的重新映射的PCM块。