Controller for direct access to a memory for the direct transfer of data between memories of several peripheral devices, method and computer program enabling the implementation of such a controller

摘要

The subject of the invention is in particular the direct transfer of data between first and second peripherals connected via a communication bus. For this purpose, the first peripheral comprises a controller for direct access to a memory having means (425) for initiating at least one command for direct access to a region of a memory external to said first peripheral and means (400) for receiving at least one command for direct access to a region of a memory of said first peripheral, said command being received from said at least one second peripheral, and means (415) for transmitting said at least one received direct access command to a component of said first peripheral. The controller thus allows a controller of direct access to a memory of said at least one second peripheral to carry out a direct transfer of at least one data item to or from a memory of said first peripheral from or to said second peripheral.

主权项

1. A controller configured to control direct access to or from a memory for a first peripheral device, wherein the first peripheral device is configured to be connected to at least one second peripheral device via a communication bus, the controller comprising:
a memory; and a processing unit in communication with the memory, wherein the processing unit is configured to:
register the first peripheral device and describe its type so as to be identifiable by the second peripheral device and so as to identify the second peripheral device;initiate a command for direct access to an area of a memory external to the first peripheral device;receive at least one command for direct access to an area of a memory of the first peripheral device, the received command being received from the second peripheral device;send the received command to a component of the first peripheral device; andenable a controller for direct access to a memory of the second peripheral device to perform a direct transfer of data to or from the area of the memory of the first peripheral device from or to the memory of the second peripheral device.