Appeal No. 94-3710
Application 07/777,608
segment descriptor cache is flushed. (Coherency is provided
between the segment descriptor table and the data cache by use
of a conventional method).
Claim 1, as amended, is reproduced below:
1. A method of maintaining cache coherency between a
data cache and a segment descriptor cache in a memory
management system of a computer, said memory management system
comprising (i) a descriptor table coupled to a data processing
unit for storing segment descriptors in a first format, (ii) a
data cache coupled to said data processing unit for storing a
plurality of data entries including segment descriptors in
said first format, each of said data entries having an
inclusion bit, and (iii) a segment descriptor cache coupled to
said data cache and data processing unit having a plurality of
segment entries for storing segment descriptors in a second
format, said method comprising:
(a) providing a segment selector, said segment selector
specifying a segment descriptor in a first format in a
descriptor table;
(b) retrieving said segment descriptor in said first
format from said descriptor table in response to said segment
selector;
(c) storing said segment descriptor in said first format
into a first entry in the data cache;
(d) formatting said segment descriptor in said first
format into the second format;
(e) storing said segment descriptor in said second
format into a first segment entry in the segment descriptor
cache;
(f) setting the inclusion bit associated with said first
entry in said data cache, so that said inclusion bit indicates
an association between said first entry in said data cache
4
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Last modified: November 3, 2007