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    • 3. 发明授权
    • Pipelined microprocessor with branch misprediction cache circuits,
systems and methods
    • 流水线微处理器具有分支错误预测缓存电路,系统和方法
    • US5881277A
    • 1999-03-09
    • US874786
    • 1997-06-13
    • James O. BondiSimonjit DuttaAshwini K. Nanda
    • James O. BondiSimonjit DuttaAshwini K. Nanda
    • G06F9/38
    • G06F9/382G06F9/3804G06F9/3842
    • A microprocessor comprising an instruction pipeline (36) comprising a plurality of successive instruction stages. An instruction passes from a beginning stage (38), through a plurality of intermediary stages (40 through 52), and to an ending stage (54) of the plurality of successive instruction stages. The microprocessor also comprises a storage circuit (58) coupled to receive program thread information output from a first stage (48) of the intermediary stages. Still further, the microprocessor comprises selection circuitry (56) comprising a first input, a second input, and an output for outputting output information from its first and second inputs. The first input of the selection circuitry is coupled to receive output information output from the first stage. The second input of the selection circuitry is coupled to receive program thread information output from the storage circuit. The output of the multiplexer is coupled to an input of a second stage (50) of the intermediary stages, wherein the second stage follows the first stage. Other circuits, systems, and methods are also disclosed and claimed.
    • 一种微处理器,包括包括多个连续指令级的指令流水线(36)。 指令通过多个中间级(40至52)和多个连续指令级的结束级(54)从初始阶段(38)传递。 微处理器还包括一个存储电路(58),它被耦合以接收从中间级的第一级(48)输出的程序线程信息。 此外,微处理器包括选择电路(56),其包括第一输入端,第二输入端和用于从其第一和第二输入端输出输出信号的输出端。 选择电路的第一输入被耦合以接收从第一级输出的输出信息。 选择电路的第二输入被耦合以接收从存储电路输出的程序线程信息。 多路复用器的输出耦合到中间级的第二级(50)的输入端,其中第二级跟随第一级。 还公开并要求保护其他电路,系统和方法。
    • 10. 发明授权
    • Microprocessor system with burstable, non-cacheable memory access support
    • 微处理器系统具有可突发,不可缓存的内存访问支持
    • US06032225A
    • 2000-02-29
    • US769194
    • 1996-12-18
    • Jonathan H. ShiellAshwini K. NandaIan ChenSteven D. Krueger
    • Jonathan H. ShiellAshwini K. NandaIan ChenSteven D. Krueger
    • G06F12/08G06F13/28G06F12/00
    • G06F13/28G06F12/0888
    • A microprocessor-based system (2) is disclosed, based on an x86-architecture microprocessor (5). The system includes a memory address space (30) and a input/output address space (40), where input/output operations are performed in an I/O mapped manner. According to a first embodiment of the invention, burstable access is performed to areas of the main memory (32) which are blocked from cache access, by the microprocessor (5) asserting the cache request signal (CACHE#) in combination with the control signal (M/IO#) indicating that an I/O operation is requested. The memory controller (10) interprets this combination as a burst request to the non-cacheable memory location (32), indicates the grant of burst access by asserting the cache acknowledge control signal (KEN#), and the burst memory access is then effected. According to a second embodiment of the invention, burst access to non-cacheable memory space (32) is acknowledged by the memory controller (60) by way of a burst acknowledge signal (BEN#) that is separate from the cache acknowledgment signal (KEN#).
    • 基于x86架构的微处理器(5)公开了一种基于微处理器的系统(2)。 该系统包括存储器地址空间(30)和输入/输出地址空间(40),其中以I / O映射方式执行输入/输出操作。 根据本发明的第一实施例,微处理器(5)结合控制信号来确定高速缓存请求信号(CACHE#),对主存储器(32)的被高速缓存访​​问阻止的区域执行突发存取 (M / IO#),表示请求I / O操作。 存储器控制器(10)将该组合解释为对非可缓存存储器位置(32)的突发请求,指示通过断言高速缓存确认控制信号(KEN#)来准许突发存取,然后实现突发存储器访问 。 根据本发明的第二实施例,通过与高速缓存确认信号(KEN)分离的突发确认信号(BEN#),由存储器控制器(60)确认对非可缓存存储器空间(32)的突发访问 #)。