发明授权
US07809923B2 Direct memory access (DMA) address translation in an input/output memory management unit (IOMMU)
有权
输入/输出存储器管理单元（IOMMU）中的直接存储器访问（DMA）地址转换
- 专利标题： Direct memory access (DMA) address translation in an input/output memory management unit (IOMMU)
- 专利标题（中）： 输入/输出存储器管理单元（IOMMU）中的直接存储器访问（DMA）地址转换
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申请号： US12635385申请日： 2009-12-10
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公开(公告)号： US07809923B2公开(公告)日： 2010-10-05
- 发明人: Mark D. Hummel , Geoffrey S. Strongin , Mitchell Alsup , Michael Haertel , Andrew W. Lueck
- 申请人： Mark D. Hummel , Geoffrey S. Strongin , Mitchell Alsup , Michael Haertel , Andrew W. Lueck
- 申请人地址： KY Grand Cayman
- 专利权人： GLOBALFOUNDRIES Inc.
- 当前专利权人： GLOBALFOUNDRIES Inc.
- 当前专利权人地址： KY Grand Cayman
- 代理机构： Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.
- 代理商 Lawrence J. Merkel
- 主分类号： G06F12/10
- IPC分类号： G06F12/10
摘要：
In an embodiment, an input/output (I/O) memory management unit (IOMMU) comprises at least one memory configured to store translation data; and control logic coupled to the memory and configured to translate an I/O device-generated memory request using the translation data. The translation data corresponds to one or more device table entries in a device table stored in a memory system of a computer system that includes the IOMMU, wherein the device table entry for a given request is selected by an identifier corresponding to the I/O device that generates the request. The translation data further corresponds to one or more I/O page tables, wherein the selected device table entry for the given request includes a pointer to a set of I/O page tables to be used to translate the given request.
公开/授权文献
- US20100095085A1 DMA Address Translation in an IOMMU 公开/授权日：2010-04-15