Multiprocessor system including an exclusive access controller w

Details Multiprocessor system including an exclusive access controller w Multiprocessor system including an exclusive access controller w

1990-07-27

1993-11-16

Gossage, Glenn

Boots, shoes, and leggings

3642281, 364DIG1, 395725, G06F 1316, G06F 13364

Patent

active

052631460

ABSTRACT:
An exclusive access controller is incorporated into a multiprocessor system in which each processor generates a lock request and subsequently a memory access request when accessing shared data stored in the main memory of the system. Lock requests from the processors are held in a lock request holding circuit and one of the lock requests is selected by lock request arbitration circuitry and stored in a lock request grant circuit. Each processor includes a memory access inhibit circuit that inhibits the process from generating a memory access request until its lock request is stored in the lock request grant circuit.

REFERENCES:
patent: 4574350 (1986-03-01), Starr
patent: 4641266 (1987-02-01), Walsh
patent: 4733352 (1988-03-01), Nakamura et al.
patent: 4835672 (1989-05-01), Zenk et al.
patent: 4984153 (1991-01-01), Kregness et al.
patent: 5115499 (1992-05-01), Stiffler et al.

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