发明名称 |
Arbitrating and servicing polychronous data requests in direct memory access |
摘要 |
Systems for servicing the data and memory requirements of system devices. A DMA engine that includes a data reservoir is provided that manages and arbitrates the data requests from the system devices. An arbitration unit is provided that only allows eligible devices to make a data request in any given cycle to ensure that all devices will be serviced within a programmable time period. The data reservoir contains the data buffers for each channel of each device. A memory interface ensures that sufficient data for each channel is present in the data reservoir by making requests to a system's memory based on an analysis of each channel. Based on this analysis, a request is either made to the system's main memory, or the channel waits until it is evaluated again in the future. Each channel is thereby guaranteed a response time.
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申请公布号 |
US6976098(B2) |
申请公布日期 |
2005.12.13 |
申请号 |
US20040945052 |
申请日期 |
2004.09.20 |
申请人 |
MICROSOFT CORPORATION |
发明人 |
GRAY DONALD M.;AHSAN AGHA ZAIGHAM |
分类号 |
G06F13/28;(IPC1-7):G06F13/28 |
主分类号 |
G06F13/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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