Electrical computers and digital processing systems: memory – Addressing combined with specific memory configuration or... – For multiple memory modules
Reexamination Certificate
2005-06-14
2005-06-14
Anderson, Matthew (Department: 2186)
Electrical computers and digital processing systems: memory
Addressing combined with specific memory configuration or...
For multiple memory modules
C711S004000, C711S100000, C711S114000, C711S200000, C711S202000, C711S209000, C711S161000, C711S162000
Reexamination Certificate
active
06907494
ABSTRACT:
A processor contains a move engine and a memory controller contains a mapping engine that, together, transparently reconfigure physical memory to accomplish addition, subtraction, or replacement of a memory module. A mapping engine register stores current and new real addresses that enable the engines to virtualize the physical address of the memory module being reconfigured and provide the reconfiguration in real-time through the use of hardware functionality and not software. Using the current and new real addresses to select a source and a target, the move engine copies the contents of the memory module to be removed or reconfigured into the remaining or inserted memory modules. Then, the real address associated with the reconfigured memory module is re-assigned to the memory module receiving the copied contents, thereby creating a virtualized physical mapping from the addressable real address space being utilized by the operating system into a virtual physical address space. During the process of moving the memory contents, the mapping engine responds to Write memory requests addressed to either the current or new real address space. As will be appreciated, a memory module can be inserted, removed or replaced in physical memory without the operating system having to direct and control the reconfiguration of physical memory to accomplish the physical memory change.
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Arimilli Ravi Kumar
Dodson John Steven
Ghai Sanjeev
Wright Kenneth Lee
Anderson Matthew
Dillon & Yudell LLP
International Business Machines - Corporation
Li Zhuo H.
Salys Casimer K.
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