Method for executing a request to exchange data between first and second disjoint physical addressing spaces of chip or card circuit

2:

• The method for executing a request to exchange data as claimed in claim 1, wherein the translation of the virtual addressing space of the second software process into its physical addressing space is used by a memory management unit of the second circuit in order to determine which physical address of the second physical addressing space corresponds to the virtual address designated in the request using the data for identification of the communication channel added to this virtual address.

3:

• The method for executing a request to exchange data as claimed in claim 1, wherein the data for identification of the communication channel added to the virtual address designated in the request comprises an identifier of the second circuit, of an operating system whereon the second software process is executed and of the second access port obtained by the second software process, and an identifier of an exchange buffer memory defined on the side of the second circuit.

4:

• The method for executing a request to exchange data as claimed in claim 1, wherein the data for identification of the communication channel is added to the virtual address designated in the request by the manager of the first access port of the first circuit.

5:

• The method for executing a request to exchange data as claimed in claim 1, wherein the adding of data for identification of the communication channel to the virtual address designated in the request is carried out through encapsulation of this virtual address with this data for identification of the communication channel in a transport address, with this transport address being sent then processed by the manager of the second access port as a virtual address to be translated.

6:

• The method for executing a request to exchange data as claimed in claim 1, wherein the execution of the request is managed by direct communication established between the processor of the first circuit and a local memory of the second circuit.

7:

• The method for executing a request to exchange data according to claim 6, wherein:
• the translation of the virtual addressing space of the first software process into its physical addressing space is used by a memory management unit of the processor of the first circuit, and
• this memory management unit further makes use of the translation of the virtual addressing space of the second software process into a temporary physical addressing space used to index a look-up table wherein the data for identification of the communication channel is stored.

8:

• The method for executing a request to exchange data as claimed in claim 1, wherein the execution of the request is managed by an indirect communication established between the processor of the first circuit and a local memory of the second circuit with the invoking of a direct memory access controller for read and write access, in local memory or remotely, independent of the processor of the first circuit.

9:

• The method for executing a request to exchange data as claimed in claim 8, wherein:
• The translation of the virtual addressing space of the first software process into its physical addressing space is used by a memory management unit associated specifically with the direct memory access controller, and
• this memory management unit further makes use of the translation of the virtual addressing space of the second software process into a temporary physical addressing space used to index a look-up table wherein the data for identification of the communication channel is stored.

10:

• The method for executing a request to exchange data as claimed in claim 1, wherein the request to exchange data sent by the first software process concerns:
• a reading of the data stored in the first physical addressing space wherein the first software process is executed and a writing of this data in the second physical addressing space wherein the second software process is executed, or
• a reading of the data stored in the second physical addressing space wherein the second software process is executed and a writing of this data in the first physical addressing space wherein the first software process is executed.

11:

• The method for executing a request to exchange data as claimed in claim 1, wherein at least one of the first and second software processes is executed on a virtual machine which is itself executed by a hypervisor of the corresponding processor, with each translation of a virtual address into a corresponding local physical address comprising a translation of the virtual address into an intermediate physical address as viewed by the virtual machine and a translation of the intermediate physical address into a physical address as seen by the hypervisor.