Multiprocessor system with high-speed exclusive control
AssigneeFujitsu Limited
InventorsTeruhiko Kamigata, Shinichiro Tago, Atsushi Ike, Yoshimasa Takebe
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Abstract
A multiprocessor system includes a plurality of processors, a shared bus coupled to the plurality of processors, a resource coupled to the shared bus and shared by the plurality of processors, and an exclusive control unit coupled to the plurality of processors and configured to include a lock flag indicative of a locked/unlocked state regarding exclusive use of the resource, wherein the processors include a special purpose register interface coupled to the exclusive control unit, and are configured to access the lock flag by special purpose register access through the special purpose register interface.
Claims10
A multiprocessor system, comprising:
- a plurality of processors;
- a shared bus coupled to said plurality of processors;
- a resource coupled to said shared bus and shared by said plurality of processors;
- and
- an exclusive control unit coupled to said plurality of processors and configured to include a lock flag indicative of a locked/unlocked state regarding exclusive use of said resource,
- wherein the processors include a special purpose register interface coupled to said exclusive control unit, and are configured to access the lock flag by special purpose register access through the special purpose register interface.
A method of controlling a lock flag in a multiprocessor system which includes a plurality of processors, a shared bus coupled to said plurality of processors, a resource coupled to said shared bus and shared by said plurality of processors, comprising:
- accessing a lock flag from one of the processors by way of special purpose register access through a special purpose register interface, the lock flag indicating a locked/unlocked state regarding exclusive use of said resource.
Dependencies are inferred from the claim text.