摘要:
An integrated circuit, having a security supervision system, comprising a plurality of functional circuit blocks interconnected to collectively performing data processing tasks, one or more communication adaptors, having: (i) a hardware interconnection to the functional circuit blocks, whereby the communication adaptor senses the state and/or activity of the functional circuit block; (ii) memory storing definitions of state and/or activity of functional circuit block and actions for each definition; and (iii) processing circuitry comparing the state and/or activity of the functional block with each definition, such that when state and/or activity of the functional block corresponding to a stored definition is detected, perform the corresponding action. The memory stores a definition of state and/or activity characteristic of insecure operation of the functional circuit block and a corresponding action to partially disabling the functional circuit block and/or (ii) causing a message to be transmitted to a destination off the integrated circuit.
摘要:
An integrated circuit, having a security supervision system, comprising a plurality of functional circuit blocks interconnected to collectively performing data processing tasks, one or more communication adaptors, having: (i) a hardware interconnection to the functional circuit blocks, whereby the communication adaptor senses the state and/or activity of the functional circuit block; (ii) memory storing definitions of state and/or activity of functional circuit block and actions for each definition; and (iii) processing circuitry comparing the state and/or activity of the functional block with each definition, such that when state and/or activity of the functional block corresponding to a stored definition is detected, perform the corresponding action. The memory stores a definition of state and/or activity characteristic of insecure operation of the functional circuit block and a corresponding action to partially disabling the functional circuit block and/or (ii) causing a message to be transmitted to a destination off the integrated circuit.
摘要:
An integrated circuit chip device comprising: system circuitry; debugging circuitry configured to debug the system circuitry, the debugging circuitry being segmented into zones; wherein the debugging circuitry comprises an interconnect fabric configured to route debug messages through a zone from a zone entry node of the interconnect fabric to a zone exit node of the interconnect fabric; and wherein the debugging circuitry is configured to, on receiving a debug message at a zone entry node that is shorter than a specified length, modify the debug message to form a modified debug message by increasing the length of the debug message to the specified length.
摘要:
Roughly described, a method of powering down a portion of an integrated circuit chip, the portion of the integrated circuit chip comprising a plurality of peripheral circuits, each peripheral circuit being connected to a respective debug unit, the method comprising: prior to power down, extracting from each debug unit configuration information of that debug unit; storing the configuration information of the debug units in a memory on the integrated circuit chip during power down of the portion of the integrated circuit chip; and on power up, restoring the configuration information of each debug unit to that debug unit prior resuming operation of that debug unit and the peripheral circuit connected to that debug unit.
摘要:
An integrated circuit chip device comprising: system circuitry; debugging circuitry configured to debug the system circuitry, the debugging circuitry being segmented into zones; wherein the debugging circuitry comprises an interconnect fabric configured to route debug messages through a zone from a zone entry node of the interconnect fabric to a zone exit node of the interconnect fabric; and wherein the debugging circuitry is configured to, on receiving a debug message at a zone entry node that is shorter than a specified length, modify the debug message to form a modified debug message by increasing the length of the debug message to the specified length.
摘要:
A method of validating functional testing of system circuitry on an integrated circuit chip, the system circuitry configured to perform a plurality of functions, the integrated circuit chip further comprising debugging circuitry under the control of a debug controller, the debugging circuitry comprising at least one debug unit. The method comprises: at the system circuitry, performing one of the plurality of functions; applying a debug configuration to the at least one debug unit; and at the at least one debug unit, monitoring for a characteristic in the system circuitry's performance of the one of the plurality of functions according to that debug configuration, and reporting to the debug controller.
摘要:
A method of functionality testing system circuitry on an integrated circuit chip, the system circuitry comprising a plurality of sub-circuits and the integrated circuit chip further comprising debugging circuitry, the debugging circuitry comprising variability circuitry. The method comprises: at the system circuitry, performing a function by the sub-circuits performing concurrent actions; at the variability circuitry, altering relative timing of the concurrent actions so as to increase the likelihood of one or more errors in the system circuitry's performance of the function; and at the debugging circuitry, recording one or more errors in the system circuitry's performance of the function.
摘要:
A data processing apparatus having processing circuitry and debug circuitry is debugged by operating the processing circuitry to generate data. The debug circuitry is employed to generate trace elements indicative of the operation of the processing circuitry. Trace elements are caused to be output from the data processing apparatus over a communication bus capable of connecting a plurality of devices. The communication bus is controlled by a protocol for data interchange requiring data interchange from any device on the communication bus to be controlled by a single processing system. The passing of the trace elements onto the communication bus is controlled using an interface unit of the debug circuitry. The interface unit comprises a controller arranged to allow each of the interface unit and processing circuitry to be separate processing systems which can each independently control data interchange from the data processing apparatus.
摘要:
Roughly described, a method of controlling transportation of debug data on an integrated circuit chip, the integrated circuit chip comprising a shared hub and a plurality of peripheral circuits, each peripheral circuit being connected to a respective debug unit, wherein between each respective debug unit and the shared hub there is an interface configured to transport data messages over each of a plurality of flows, the flows being assigned priorities, the method comprising: transporting control data for controlling the state of a debug unit on a priority flow having a first priority; and transporting debug data output by a debug unit as a result of debugging the peripheral circuit connected to that debug unit on a flow having a second priority, wherein the first priority is higher than the second priority.
摘要:
Roughly described, a method of sending a message from a source unit to a destination unit both forming part of a hierarchical debug architecture on a chip, the units in the hierarchy using a protocol in which each unit has an internal address which is the same base address, and in which each unit addresses other units using addresses derivable relative to that unit's internal address given positions of other units in the hierarchy, comprising: the source unit in a first level of the hierarchy sending a message comprising a destination address of the destination unit, the destination address being relative to the source unit's internal address, and an intermediate unit in a second level of the hierarchy: adding an offset to the destination address to form a rebased destination address, being relative to the intermediate unit's internal address, and routing the rebased message onto the destination unit.