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US Patent 7263572 Bus bridge and data transfer method

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Patent abstractTimelineTable: Further ResourcesReferences
Is a
Patent
Patent

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
7263572
Patent Inventor Names
Yoshihiro Hiji8
Date of Patent
August 28, 2007
Patent Application Number
11064084
Date Filed
February 24, 2005
Patent Citations Received
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US Patent 12124576 Systems and methods for policy violation processing
1
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US Patent 11875180 Systems and methods for stalling host processor
2
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US Patent 11977613 System and method for translating mapping policy into code
3
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US Patent 12079197 Systems and methods for updating metadata
4
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US Patent 12124566 Systems and methods for metadata encoding
5
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US Patent 11709680 Systems and methods for policy execution processing
6
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US Patent 11748457 Systems and methods for policy linking and/or loading for secure initialization
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US Patent 11782714 Metadata programmable tags
...
Patent Primary Examiner
‌
Paul R. Myers
Patent abstract

In response to a direct memory access (DMA) request, a direct memory access controller (DMAC) performs reading at a host side at which a high-speed bus master is arranged. A bus bridge sends a dummy data to the DMAC, and performs reading at an input/output (I/O) side at which a low-speed slave device is arranged. In response to a following DMA request, the DMAC performs reading at the host side. The bus bridge sends a data read for a previous DMA request at the I/O side to the DMAC, and performs reading at the I/O side. Data that is read in response to a final DMA request at the I/O side is stored in a buffer inside the bus bridge. A central processing unit (CPU) reads a last read data from the buffer.

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