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1. 发明申请

US20070180196A1 Data processing system, cache system and method for handling a flush operation in a data processing system having multiple coherency domains 失效
标题翻译：数据处理系统，缓存系统和用于处理具有多个相干域的数据处理系统中的刷新操作的方法
公开(公告)号：US20070180196A1
公开(公告)日：2007-08-02
申请号：US11342951
申请日：2006-01-30
申请人： Guy Guthrie , John Hollaway , William Starke , Derek Williams
发明人： Guy Guthrie , John Hollaway , William Starke , Derek Williams
IPC分类号： G06F13/28
CPC分类号： G06F12/0822 , G06F12/0804 , G06F12/0831
摘要： A cache coherent data processing system includes at least first and second coherency domains. The first coherency domain contains a memory controller, an associated system memory having a target memory block identified by a target address, and a domain indicator indicating whether the target memory block is cached outside the first coherency domain. During operation, the first coherency domain receives a flush operation broadcast to the first and second coherency domains, where the flush operation specifies the target address of the target memory block. The first coherency domain also receives a combined response for the flush operation representing a system-wide response to the flush operation. In response to receipt in the first coherency domain of the combined response, a determination is made if the combined response indicates that a cached copy of the target memory block may remain within the data processing system. In response to a determination that the combined response indicates that a cached copy of the target memory block may remain in the data processing system, the domain indicator is updated to indicate that the target memory block is cached outside of the first coherency domain.
摘要翻译：缓存相干数据处理系统至少包括第一和第二相干域。第一相干域包括存储器控制器，具有由目标地址标识的目标存储器块的相关系统存储器，以及指示目标存储器块是否被高速缓存在第一相干域之外的域指示符。在操作期间，第一相干域接收向第一和第二相干域广播的刷新操作，其中刷新操作指定目标存储器块的目标地址。第一个相干域还接收表示对刷新操作的系统范围响应的刷新操作的组合响应。响应于在组合响应的第一相关域中的接收，确定组合响应是否指示目标存储器块的高速缓存副本可能保留在数据处理系统内。响应于组合响应指示目标存储器块的高速缓存副本可能保留在数据处理系统中的确定，更新域指示符以指示目标存储器块被高速缓存在第一相干域之外。

2. 发明申请

US20070088926A1 Data processing system and method in which a participant initiating a read operation protects data integrity 失效
标题翻译：数据处理系统和方法，其中发起读取操作的参与者保护数据完整性
公开(公告)号：US20070088926A1
公开(公告)日：2007-04-19
申请号：US11250022
申请日：2005-10-13
申请人： James Fields , Guy Guthrie , John Hollaway , Derek Williams
发明人： James Fields , Guy Guthrie , John Hollaway , Derek Williams
IPC分类号： G06F12/14
CPC分类号： G06F12/0831 , G06F12/0815 , G06F12/0824
摘要： A data processing system includes a plurality of requestors and a memory controller for a system memory. In response to receiving from the requestor a read-type request targeting a memory block in the system memory, the memory controller protects the memory block from modification, and in response to an indication that the memory controller is responsible for servicing the read-type request, the memory controller transmits the memory block to the requestor. Prior to receipt of the memory block by the requestor, the memory controller ends protection of the memory block from modification, and the requestor begins protection of the memory block from modification. In response to receipt of the memory block, the requestor ends its protection of the memory block from modification.
摘要翻译：数据处理系统包括多个请求者和用于系统存储器的存储器控制器。响应于从请求者接收到针对系统存储器中的存储器块的读取型请求，存储器控制器保护存储器块免受修改，并且响应于存储器控制器负责维护读取类型请求的指示存储器控制器将该存储器块发送给请求者。在请求者接收到存储器块之前，存储器控制器结束对存储器块的保护而不被修改，并且请求者开始保护存储器块免受修改。响应于存储器块的接收，请求者结束其对存储器块的保护以免修改。

3. 发明申请

US20060271741A1 Data processing system, cache system and method for scrubbing a domain indication in response to execution of program code 有权
标题翻译：数据处理系统，缓存系统和用于响应于程序代码的执行来擦除域指示的方法
公开(公告)号：US20060271741A1
公开(公告)日：2006-11-30
申请号：US11136642
申请日：2005-05-24
申请人： Leo Clark , James Fields , Guy Guthrie , William Starke , Derek Williams
发明人： Leo Clark , James Fields , Guy Guthrie , William Starke , Derek Williams
IPC分类号： G06F13/28
CPC分类号： G06F12/0831 , G06F12/0813
摘要： In response to execution of program code, a control register within scrubbing logic in a local coherency domain is initialized with at least a target address of a target memory block. In response to the initialization, the scrubbing logic issues to at least one cache hierarchy in a remote coherency domain a domain indication scrubbing request targeting a target memory block that may be cached by the at least one cache hierarchy. In response to receipt of a coherency response indicating that the target memory block is not cached in the remote coherency domain, a domain indication in the local coherency domain is updated to indicate that the target memory block is cached, if at all, only within the local coherency domain.
摘要翻译：响应于程序代码的执行，用至少目标存储器块的目标地址初始化局部一致性域内的擦除逻辑中的控制寄存器。响应于初始化，擦除逻辑向远程一致性域中的至少一个高速缓存层级发出针对可由所述至少一个高速缓存层级缓存的目标存储器块的域指示擦除请求。响应于接收到指示目标存储器块未被缓存在远程一致性域中的一致性响应，本地一致性域中的域指示被更新以指示目标存储器块被缓存，如果完全只在局部一致性域。

4. 发明申请

US20060184749A1 Reducing number of rejected snoop requests by extending time to respond to snoop request 有权
公开(公告)号：US20060184749A1
公开(公告)日：2006-08-17
申请号：US11056764
申请日：2005-02-11
申请人： Guy Guthrie , Hugh Shen , William Starke , Derek Williams
发明人： Guy Guthrie , Hugh Shen , William Starke , Derek Williams
IPC分类号： G06F13/28
CPC分类号： G06F12/0831
摘要： A cache, system and method for reducing the number of rejected snoop requests. An incoming snoop request is entered in the first available latch in a pipeline of latches in a stall/reorder unit if the stall/reorder unit is not full. The entered snoop request is dispatched to a selector upon entering a bottom latch in the pipeline. The stall/reorder unit is not informed as to whether the dispatched snoop request is accepted by an arbitration mechanism for several clock cycles after the dispatch occurred. A copy of the dispatched snoop request is stored in a top latch in an overrun pipeline of latches in the first unit upon dispatching the snoop request. By maintaining information about the snoop request, the snoop request may be dispatched again to the selector in case the dispatched snoop request was rejected thereby increasing the chance that the snoop request will ultimately be accepted.

5. 发明申请

US20060085603A1 Processor, data processing system and method for synchronzing access to data in shared memory 有权
标题翻译：处理器，数据处理系统和方法，用于同步共享存储器中数据的访问
公开(公告)号：US20060085603A1
公开(公告)日：2006-04-20
申请号：US10965113
申请日：2004-10-14
申请人： Guy Guthrie , Sheldon Levenstein , William Starke , Derek Williams
发明人： Guy Guthrie , Sheldon Levenstein , William Starke , Derek Williams
IPC分类号： G06F12/00
CPC分类号： G06F9/3834 , G06F9/3004 , G06F9/30072 , G06F9/30087 , G06F9/3851 , G06F12/0811 , G06F12/0831 , G06F12/0855
摘要： A processing unit for a multiprocessor data processing system includes a store-through upper level cache, an instruction sequencing unit that fetches instructions for execution, at least one instruction execution unit that executes a store-conditional instruction to determine a store target address, a store queue that, following execution of the store-conditional instruction, buffers a corresponding store operation, sequencer logic associated with the store queue. The sequencer logic, responsive to receipt of a latency indication indicating that resolution of the store-conditional operation as passing or failing is subject to significant latency, invalidates, prior to resolution of the store-conditional operation, a cache line in the store-through upper level cache to which a load-reserve operation previously bound.
摘要翻译：一种用于多处理器数据处理系统的处理单元，包括存储器上级缓存器，取指令执行指令排序单元，执行存储条件指令以确定存储目标地址的至少一个指令执行单元，存储器在存储条件指令的执行之后，缓存与存储队列相关联的对应存储操作，定序器逻辑的队列。定序器逻辑响应于指示存储条件操作的解析作为传递或失败的等待时间指示受到重大等待时间的影响，在存储条件操作的解析之前无效，存储器中的高速缓存行加载预备操作先前绑定到的高级缓存。

6. 发明申请

US20070168618A1 Data processing system, cache system and method for precisely forming an invalid coherency state indicating a broadcast scope 失效
标题翻译：数据处理系统，缓存系统和精确形成指示广播范围的无效一致性状态的方法
公开(公告)号：US20070168618A1
公开(公告)日：2007-07-19
申请号：US11333615
申请日：2006-01-17
申请人： Leo Clark , Guy Guthrie , William Starke , Jeffrey Stuecheli , Derek Williams
发明人： Leo Clark , Guy Guthrie , William Starke , Jeffrey Stuecheli , Derek Williams
IPC分类号： G06F13/28
CPC分类号： G06F12/0831
摘要： A cache coherent data processing system includes at least first and second coherency domains. In a first cache memory within the first coherency domain of the data processing system, a memory block is held in a storage location associated with an address tag and a coherency state field. A determination is made if a home system memory assigned an address associated with the memory block is within the first coherency domain. If not, the coherency state field is set to a coherency state that indicates that the address tag is valid, that the storage location does not contain valid data, the first coherency domain does not contain the home system memory, and that, following formation of the coherency state, the memory block is cached outside of the first coherency domain.
摘要翻译：缓存相干数据处理系统至少包括第一和第二相干域。在数据处理系统的第一相关域内的第一高速缓存存储器中，存储块被保存在与地址标签和一致性状态字段相关联的存储位置中。如果分配了与存储器块相关联的地址的归属系统存储器在第一相干域内，则确定。如果不是，则将一致性状态字段设置为指示地址标签有效的一致性状态，即存储位置不包含有效数据，第一相干域不包含家庭系统存储器，并且在形成一致性状态下，内存块被缓存在第一个相干域之外。

7. 发明申请

US20060277370A1 Data processing system and method for selectively updating an invalid coherency state in response to snooping a castout 有权
公开(公告)号：US20060277370A1
公开(公告)日：2006-12-07
申请号：US11146443
申请日：2005-06-06
申请人： Guy Guthrie , William Starke , Jeffrey Stuecheli , Derek Williams
发明人： Guy Guthrie , William Starke , Jeffrey Stuecheli , Derek Williams
IPC分类号： G06F13/28
CPC分类号： G06F12/0831 , G06F12/0813
摘要： In an entry of a first cache memory within a first coherency domain of a data processing system including at least first and second coherency domains, a coherency state field is set to a first state that indicates that an associated address tag is valid, an associated storage location does not contain valid data, and a memory block identified by the address tag is likely cached outside the first coherency domain. In response to snooping a castout operation, the first cache memory determines if the castout operation hits in the entry and, if so, updates the coherency state field from the first state to a second state indicating that the associated address tag is invalid.

8. 发明申请

US20060271742A1 Data processing system, cache system and method for actively scrubbing a domain indication 失效
公开(公告)号：US20060271742A1
公开(公告)日：2006-11-30
申请号：US11136651
申请日：2005-05-24
申请人： Leo Clark , James Fields , Guy Guthrie , William Starke , Derek Williams
发明人： Leo Clark , James Fields , Guy Guthrie , William Starke , Derek Williams
IPC分类号： G06F13/28
CPC分类号： G06F12/0817 , G06F12/0822
摘要： Scrubbing logic in a local coherency domain issues to at least one cache hierarchy in a remote coherency domain a domain reset request that forces invalidation of any cached copy of a target memory block then held in said remote coherency domain. A coherency response to said domain reset request is received. In response to said coherency response indicating that said target memory block is not cached in said remote coherency domain, a domain indication of said local coherency domain is updated to indicate that said target memory block is cached, if at all, only within said local coherency domain.

9. 发明申请

US20060184748A1 Reducing number of rejected snoop requests by extending time to respond to snoop request 失效
公开(公告)号：US20060184748A1
公开(公告)日：2006-08-17
申请号：US11056740
申请日：2005-02-11
申请人： Benjiman Goodman , Guy Guthrie , William Starke , Jeffrey Stuecheli , Derek Williams
发明人： Benjiman Goodman , Guy Guthrie , William Starke , Jeffrey Stuecheli , Derek Williams
IPC分类号： G06F13/28
CPC分类号： G06F12/0831
摘要： A cache, system and method for reducing the number of rejected snoop requests. A “stall/reorder unit” in a cache receives a snoop request from an interconnect. Information, such as the address, of the snoop request is stored in a queue of the stall/reorder unit. The stall/reorder unit forwards the snoop request to a selector which also receives a request from a processor. An arbitration mechanism selects either the snoop request or the request from the processor. If the snoop request is denied by the arbitration mechanism, information, e.g., address, about the snoop request may be maintained in the stall/reorder unit. The request may be later resent to the selector. This process may be repeated up to “n” clock cycles. By providing the snoop request additional opportunities (n clock cycles) to be accepted by the arbitration mechanism, fewer snoop requests may ultimately be denied.

10. 发明申请

US20060179226A1 System and method of re-ordering store operations within a processor 失效
标题翻译：在处理器内重新排序存储操作的系统和方法
公开(公告)号：US20060179226A1
公开(公告)日：2006-08-10
申请号：US11054450
申请日：2005-02-09
申请人： Guy Guthrie , Hugh Shen , William Starke , Derek Williams
发明人： Guy Guthrie , Hugh Shen , William Starke , Derek Williams
IPC分类号： G06F12/00
CPC分类号： G06F9/3834 , G06F9/30043 , G06F9/3824 , G06F12/0817
摘要： A system and method for re-ordering store operations from a processor core to a store queue. When a store queue receives a new processor-issued store operation from the processor core, a store queue controller allocates a new entry in the store queue. In response to allocating the new entry in the store queue, the store queue controller determines whether or not the new entry is dependent on at least one other valid entry in the store queue. In response to determining the new entry is dependent on at least one other valid entry in the store queue, the store queue controller inhibits requesting of the new entry to the RC dispatch logic until each valid entry on which the new entry is dependent has been successfully dispatched to an RC machine by the RC dispatch logic.
摘要翻译：一种用于重新排序从处理器核到存储队列的存储操作的系统和方法。当存储队列从处理器核心接收到新的处理器发出的存储操作时，存储队列控制器在存储队列中分配新的条目。响应于在商店队列中分配新条目，商店队列控制器确定新条目是否依赖于商店队列中的至少一个其他有效条目。响应于确定新条目取决于存储队列中的至少一个其他有效条目，存储队列控制器禁止向RC调度逻辑请求新条目，直到新条目依赖于其上的每个有效条目已经成功通过RC调度逻辑调度到RC机器。

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