Mapping device addresses to physical memory addresses

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United States of America Patent

PATENT NO 9785597
SERIAL NO

15093621

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Abstract

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A data processing system includes a main storage, an input/output memory management unit (IOMMU) coupled to the main storage, a peripheral component interconnect (PCI) device coupled to the IOMMU, and a mapper. The system is configured to allocate an amount of physical memory in the main storage and the IOMMU is configured to provide access to the main storage and to map a PCI address from the PCI device to a physical memory address within the main storage. The mapper is configured to perform a mapping between the allocated amount of physical memory of the main storage and a contiguous PCI address space. The IOMMU is further configured to translate PCI addresses of the contiguous PCI address space to the physical memory address within the main storage.

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Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINES CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bayer, Gerd Boeblingen, DE 10 277
Hering, Hannes Boeblingen, DE 2 39
Nguyen, Hoang-Nam Boeblingen, DE 13 160
Raisch, Christoph Boeblingen, DE 94 909
Themann, Jan-Bernd Boeblingen, DE 11 136

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