METHOD FOR UPDATING A BOOT LOADER OF A MULTIPROCESSOR DEVICE

摘要

A device comprises a first processor and a second processor, the first processor being able to execute a boot loader. The device implements a phase of boot-securing in the event of an electrical anomaly occurring while the boot loader is being updated, the phase of boot-securing being implemented by way of an emergency power supply source acting as a relay for a main power supply, the phase of boot-securing comprising the following steps: stopping (203) the current updating of the boot loader; and invalidating (205) the boot loader. The device implements a phase of delayed booting of the second processor, enabling to boot the device in a boot loader update mode if said stored boot loader is invalid.

主权项

1) A method for updating a boot loader stored in a rewritable non-volatile memory of a device comprising a first processor and a second processor, the first processor being configured for executing the boot loader,
the method being implemented by the device and comprising a phase of boot-securing implemented in case of an electrical anomaly occurring during an update of the boot loader, the phase of boot-securing being implemented by way of an emergency power supply source acting as a relay for a main power supply when the electrical anomaly is present, the phase of boot-securing comprising:
stopping the current updating of the boot loader; andinvalidating the boot loader for the first processor; and the method further comprises a phase of delayed booting of the second processor with respect to the booting of the first processor enabling, when the boot loader is not valid, booting the device in a mode of updating of the boot loader.