公开(公告)号：WO2015061731A1

公开(公告)日：2015-04-30

申请号：PCT/US2014/062249

申请日：2014-10-24

Applicant: ADVANCED MICRO DEVICES, INC. ,  ATI TECHNOLOGIES ULC

Inventor： KALYANASUNDHARAM, Vydhyanathan ,  NG, Philip ,  CHAN, Maggie ,  CUEVA, Vincent ,  CHEN, Liang ,  ASARO, Anthony ,  MIRZA, Jimshed ,  DONLEY, Greggory Douglas ,  BROUSSARD, Bryan ,  TSIEN, Benjamin ,  ADIRI, Yaniv

IPC: G06F12/02 ,  G06F12/06 ,  G11C7/10

CPC classification number: G06F12/1009 ,  G06F12/1045 ,  G06F12/12 ,  G06F2212/684

Abstract: The present invention provides for page table access and dirty bit management in hardware via a new atomic test[0] and OR and Mask. The present invention also provides for a gasket that enables ACE to CCI translations. This gasket further provides request translation between ACE and CCI, deadlock avoidance for victim and probe collision, ARM barrier handling, and power management interactions. The present invention also provides a solution for ARM victim/ probe collision handling which deadlocks the unified northbridge. These solutions includes a dedicated writeback virtual channel, probes for IO requests using 4-hop protocol, and a WrBack Reorder Ability in MCT where victims update older requests with data as they pass the requests.

Abstract translation: 本发明通过新的原子测试[0]和OR和Mask来提供在硬件中的页表访问和脏位管理。 本发明还提供了一种使ACE能够进行CCI翻译的垫圈。 该垫片进一步提供了ACE和CCI之间的请求转换，针对受害者和探针冲突的死锁避免，ARM屏障处理和电源管理交互。 本发明还提供了一种用于ARM受害者/探测器碰撞处理的解决方案，其使统一的北桥陷入僵局。 这些解决方案包括一个专用的回写虚拟通道，使用4跳协议的IO请求的探测器和MCT中的WrBack重新排序能力，其中受害者通过数据通过请求时更新旧的请求。