ARM R4 Manual De Usuario
Glossary
ARM DDI 0363E
Copyright © 2009 ARM Limited. All rights reserved.
Glossary-15
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Write-through (WT)
In a write-through cache, data is written to main memory at the same time as the cache is
updated.
updated.
WT
See Write-through.
Cache terminology diagram
The figure below illustrates the following cache terminology:
•
•
block address
•
cache line
•
cache set
•
cache way
•
index
•
tag.
Tag
Tag
Tag
Tag
Index
Word
Hit
(way number)
Read data
(way that corresponds)
=
3
1
Tag
0
0
2
1
3
4
5
6
7
4
5
6
7
n
Byte
Cache way
Cache set
m
1
2
0
Cache line
2
Block address
Line number
Word number
Cache tag RAM
Cache data RAM