Memory Management Unit
ARM DDI 0301H Copyright © 2004-2009 ARM Limited. All rights reserved. 6-51
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Figure 6-17 4KB extended small page translations, ARMv6 format
Figure 6-18 on page 6-52 shows the translation process for a 4KB extended small page or a 1KB
extended small page subpage using backwards-compatible format descriptors, AP bits enabled.
N
S
S
1
Coarse page table base address
31 1098 543210
P Domain 0
First-level table index
31 20 19 12 11 0
Second-level
table index
Page index
Translation base
31 14 13 0
X
N
Extended small page base address
31 12111098 6543210
n
G
A
P
X
TEX AP C B 1
0
Coarse page table base address
31 10 9 2 1 0
Second-level table
index
0
0
Translation base
31 14 13 0
First-level table index 0
21
Page index
Page base address
31 12 11 0
Second-level descriptor address
Second-level descriptor
Physical address
First-level descriptor
First-level descriptor address
Modified virtual address
Translation table base
SBZ SBZ
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