Bull S.a.

Christophe Dionet

Jean-Francedillaois Autechaud

Jean-Fran&ccedil;ois Autechaud

Jack Abily

Process for detecting errors in a serial link of an integrated circuit and device for implementing the process

Process and system for initializing a serial link between two integrated circuits comprising a parallel-serial port using two clocks with different frequencies

A device for detecting errors with an integrated self-check, on an integrated circuit comprising a serial link control function for constituting an input-output port (,) between a parallel bus (L2CB, C2LB) and a serial link. The integrated circuit comprises a serializer circuit (,) on output and a deserializer circuit (,) on input. An insertion buffer I-sb has each of its outputs connected to one input of an exclusive OR operation with two inputs. The second input of the exclusive OR operation receives a piece of information (o-s) to be transmitted in order to constitute, with the insertion information issuing from the insertion buffer, a piece of substitute information. An additional buffer (I-tb) makes it possible to compare the sequence supplied as output from the exclusive OR with a sequence stored in the additional buffer (I-tb) in order to validate the transmission of the substitute sequence. A history buffer (HIB) stores characters received from the deserializer and makes it possible to diagnose the error.

Device and process for detecting errors in an integrated circuit comprising a parallel-serial port

In order to allow a plurality of remote data processing systems (1, 2) to communicate with one another by means of a storage unit (8) shared among these remote systems, each data processing system (1, 2) has the capability to reserve itself temporary exclusive access to the storage unit (8) by means of atomic operations. One particular atomic operation used is comprised of replacing a current value of a register (OPA) in the storage unit (8) with a new value communicated by the data processing system (1, 2) remote from the storage unit, it being understood that the remote data processing system knows an old value of the register (OPA) that is not necessarily equal to its current value. A device is installed in a storage controller (7, 16, 27) for the purpose of executing the atomic operation locally relative to the storage unit (8).

Atomic operation in remote storage and device for executing this

Electrical circuit (5) arranged to move data blocks from a source memory unit (8, 9, 12) to a target memory unit (9, 12, 8) by a data path (5, 6, 7), to send, in a given order, requests to read blocks in the source memory, to generate an end marker in the request to read the last block of the source memory, to receive the blocks read, in the form of response messages, in the order in which the requests were sent, and to send requests to write the received blocks, in the target memory, during receiving of response messages until receiving a message from the source memory with the end marker.

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Ivry sur Seine, France

Christophe Dionet