Command processing method and storage controller

A command processing method, adapted for a storage controller, the storage controller including a processor and a plurality of peripherals, the processor coupled to the peripherals through a system bus, the command processing method comprising:

• disposing a first command buffer and a second command buffer in the processor, the first command buffer and the second command buffer coupled to a processor core of the processor through a local bus of the processor, wherein latency of the local bus is lower than latency of the system bus;
• disposing a synchronizer in the storage controller, the synchronizer coupled to the processor and the peripherals and changing a value of a flag at a predetermined interval to set the first command buffer or the second command buffer valid;
• and
• when the first command buffer is valid and the processor issues a command, the processor stores the command in the first command buffer temporarily and one of the peripherals accesses the command in the first command buffer to perform a corresponding operation.