MECHANISM FOR MANAGING ACCESS TO AT LEAST ONE SHARED INTEGRATED PERIPHERAL OF A PROCESSING UNIT AND A METHOD OF OPERATING THEREOF

摘要

The present application relates to a mechanism for managing access to at least one shared integrated peripheral of a processing unit and a method of operating thereof. The mechanism is operative in an available state and a locked state. The mechanism comprises at least one context register and a bus interface for receiving a request. A filtering unit obtains information relating to a context of the received request. If in the available state, a managing unit loads the context register with the obtained context information; and grants access in response to the received request. If in the locked state, the managing unit detects whether the obtained context information matches with the context information stored in the context register; and if the obtained and stored context information match, grants access in response to the received request. Otherwise, access is denied.

主权项

1. A mechanism for managing access to at least one shared integrated peripheral of a processing unit, wherein the mechanism is operative in one of at least two operational states comprising an available state and a locked state, wherein the mechanism comprises:
at least one context register for storing context information; a bus interface for receiving a request communicated via a bus to the integrated peripheral of the processing device, a managing unit operably coupled to the bus interface, and a filtering unit operably inter-coupled between the bus interface and one or more circuitries of the integrated peripheral and further operably coupled to the managing unit, wherein the filtering unit is arranged to obtain information relating to a context of the received request; wherein the managing unit is arranged to if the operative state of the mechanism is in the available state:
load the context register with the obtained context information, andgrant access in response to the received request; and if the operative state of the mechanism is in the locked state:
detect whether the obtained context information matches with the context information stored in the context register; andif the obtained and stored context information match, grant access in response to the received request.