Memory access serialization as an MMU page attribute

Details Memory access serialization as an MMU page attribute Memory access serialization as an MMU page attribute

1989-09-29

1991-12-24

Hecker, Stuart N.

Boots, shoes, and leggings

395425, 3642511, G06F 906

Patent

active

050758462

ABSTRACT:
A data processor having a serialization attribute on a page basis is provided. A set of page descriptors and transparent translation registers encode the serialization attribute as a cache mode. The data processor is a pipelined machine, having at least two function units, which operate independently of each other. The function units issues requests, for access to information stored in an external memory, to an access controller. The access controller serves as an arbitration mechanism, and grants the requests of the function units in accordance with the issuance order of the requests by the function units. When the memory access is marked serialized in the page descriptor, an access controller postpones the serialized access, until the completion of all pending memory accesses in the instruction sequence. All pending requests are then completed in a predetermined order, independent of the issuance order of the requests made by the function units, and all appropriate exception processing is completed. The postponed serialized access is then completed.

REFERENCES:
patent: 3647348 (1972-03-01), Smith et al.
patent: 4212057 (1980-07-01), Devlin et al.
patent: 4604685 (1986-08-01), Brown et al.
patent: 4631674 (1986-12-01), Blandy
patent: 4680700 (1987-07-01), Hester et al.
patent: 4710868 (1987-12-01), Cocke et al.

Affiliated with

Also associated with

Rating

Memory access serialization as an MMU page attribute does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Memory access serialization as an MMU page attribute, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Memory access serialization as an MMU page attribute will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-49060