发明申请
- 专利标题： DMA transfer controller
- 专利标题（中）： DMA传输控制器
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申请号： US10901294申请日： 2004-07-29
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公开(公告)号： US20050050241A1公开(公告)日： 2005-03-03
- 发明人: Akihiro Furuta , Nobuo Higaki , Tetsuya Tanaka , Tsuneyuki Suzuki
- 申请人： Akihiro Furuta , Nobuo Higaki , Tetsuya Tanaka , Tsuneyuki Suzuki
- 优先权： JPP.2003-285080 20030801
- 主分类号： G06F13/362
- IPC分类号： G06F13/362 ; G06F13/28 ; G06F13/32
摘要：
The present invention provides a DMA transfer controller includes: a transfer parameter storing unit for storing a bus occupation time value and transfer parameters of one set or a plurality of sets of DMA transfers for each of a plurality of logical processors; a data transfer performing unit for performing the DMA transfer on the basis of the DMA transfer parameters; a control unit for controlling the receive and transmit of the DMA transfer parameters and the start and the interruption of the DMA transfers; and a time measuring unit for starting to measure bus occupation elapse time when a first DMA transfer is started for each of the logical processors. When the bus occupation elapse time reaches the bus occupation time value, the control unit interrupts the DMA transfer that is currently performed to start the DMA transfers based on the transfer parameters related to the logical processors of a prescribed sequence.
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