Multiprocessor system including a power saving mode and control method thereof, and computer-readable medium
AssigneeCanon Kabushiki Kaisha
InventorHitoshi Aoki
Life of this patent
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Abstract
A multiprocessor system configured to share processes by a main system having a first processor and a subsystem having a second processor, comprises a first shared memory configured to receive accesses from the main system and the subsystem, a second memory configured to receive access from the subsystem at a power saving mode, a stop unit configured to stop accesses from the main system and the subsystem to the first shared memory when the subsystem enters the power saving mode, and a switching unit configured to switch an access destination of the subsystem from the first shared memory to the second memory when the subsystem enters the power saving mode.
Claims16
A multiprocessor system configured to share processes by a main system including a first processor and a subsystem including a second processor, comprising:
- a first shared memory configured to receive accesses from the main system and the subsystem, the main system including the first processor, and the subsystem including the second processor;
- a second memory configured to receive access from the subsystem at a power saving mode;
- a stop unit configured to stop accesses from the main system and the subsystem to said first shared memory when the subsystem enters the power saving mode;
- and
- a switching unit configured to switch an access destination of the subsystem from said first shared memory to said second memory when the subsystem enters the power saving mode.
A method of controlling a multiprocessor system configured to share processes by a main system including a first processor and a subsystem including a second processor, and includes a first shared memory which is accessed by the main system and the subsystem, and a second memory which is accessed by the subsystem at a power saving mode, the method comprising:
- stopping accesses from the main system and the subsystem, the main system including the first processor and the subsystem including the second processor, to the first shared memory when the subsystem enters the power saving mode;
- and
- switching an access destination of the subsystem from the first shared memory to the second memory when the subsystem enters the power saving mode.
A non-transitory computer readable storage medium, storing a program which causes a multiprocessor system to execute a control method for the multiprocessor system, wherein the multiprocessor system configured to share processes by a main system including a first processor and a subsystem including a second processor, and having a first shared memory accessed by the main system and the subsystem, and a second memory accessed by the subsystem at a power saving mode, the method comprising:
- stopping accesses from the main system and the subsystem, the main system including the first processor and the subsystem including the second processor, to the first shared memory when the subsystem enters the power saving mode;
- and
- switching an access destination of the subsystem from the first shared memory to the second memory when the subsystem enters the power saving mode.
Dependencies are inferred from the claim text.