Circuit for reassigning the power-on processor in a multiprocess

Details Circuit for reassigning the power-on processor in a multiprocess Circuit for reassigning the power-on processor in a multiprocess

1994-12-30

1997-05-06

Beausoliel, Jr., Robert W.

39518211, 39518312, G01R 3128, G06F 1100

Patent

active

056279620

ABSTRACT:
A hot spare boot circuit that automatically switches from a non-operational CPU to an operational CPU for powering up the computer system. In the multiprocessor computer system, a first CPU is designated to perform power on operations. If the first CPU fails, which is determined when a dead man counter in the hot spare boot circuit times out, the hot spare circuit ensures that the first CPU is in a disabled state. Next, the hot spare boot circuit identifies an operational second CPU, reinitializing certain ID information as necessary such that the second CPU can properly perform power on operations. The hot spare boot then awakens the second CPU, using a startup interprocessor interrupt in one embodiment, or simply negating the hard reset of the second CPU in a second embodiment. The second CPU then proceeds to perform the power on functions.

REFERENCES:
patent: 4502116 (1985-02-01), Fowler et al.
patent: 4634110 (1987-01-01), Julich et al.
patent: 4646298 (1987-02-01), Laws et al.
patent: 4703419 (1987-10-01), Krause et al.
patent: 4775976 (1988-10-01), Yokoyama
patent: 4823256 (1989-04-01), Bishop et al.
patent: 4839895 (1989-06-01), Makita
patent: 4860196 (1989-08-01), Wengert
patent: 5155729 (1992-10-01), Rysko et al.
patent: 5408647 (1995-04-01), Landry
patent: 5450576 (1995-09-01), Kennedy
patent: 5491788 (1996-02-01), Cepulis
patent: 5495569 (1996-02-01), Kotzur
Start-up Master Processor Selection Method for Multi-Processor Systems, 33 IBM Technical Disclosure Bulletin 375-376 (Sep. 1990).
Pentium Processor at iComp Index 735/90 MHz, Pentium Processor at (Comp Index 815/100 MHz, Intel Corp., pp. 1-6, 12-19 (May 1994).
Pentium Family User's Manual, vol. 1: Data Book, 18-4, 18-11 to 18-18 19-5 to 19-13, 20-1 to 20-3, 21-13 (1994).

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