发明名称 |
TECHNIQUES FOR MAPPING DEVICE ADDRESSES TO PHYSICAL MEMORY ADDRESSES |
摘要 |
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. |
申请公布号 |
US2016224496(A1) |
申请公布日期 |
2016.08.04 |
申请号 |
US201615093621 |
申请日期 |
2016.04.07 |
申请人 |
International Business Machines Corporation |
发明人 |
Bayer Gerd;Hering Hannes;Nguyen Hoang-Nam;Raisch Christoph;Themann Jan-Bernd |
分类号 |
G06F13/40;G06F12/10;G06F13/42 |
主分类号 |
G06F13/40 |
代理机构 |
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代理人 |
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主权项 |
1. A data processing system, comprising:
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 configured to perform a mapping between an allocated amount of physical memory of the main storage and a contiguous PCI address space, wherein the IOMMU is further configured to translate PCI addresses of the contiguous PCI address space to the physical memory address within the main storage. |
地址 |
Armonk NY US |