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7.3.10
Translating small page references
Figure 7-11 shows the complete translation sequence for a 4KB small page.
31
Translation base
31
Translation base
31
Coarse page table base address
31
Coarse page table base address
31
Page base address
31
Page base address
Figure 7-11 Small page translation from a coarse page table
If a small page descriptor is included in a fine page table, the upper two bits of the page index
and low-order two bits of the fine page table index overlap. Each fine page table entry for a
small page must therefore be duplicated four times.
ARM720T CORE CPU MANUAL
31
Table index
Translation table base
14 13
14 13
Table index
Level one descriptor
10
9
8
Domain 1
10
9
L2 table index
Level two descriptor
12
11
10
9
8
ap3
ap2 ap1 ap0
Physical address
12
11
Page index
EPSON
Modified virtual address
20 19
12 11
Level 2
table index
0
2 1 0
0 0
5
4
3
2 1
0
0
1
2 1
0
0
0
7
6
5
4
3
2
1
0
C B
1
0
0
7: Memory Management Unit
0
Page index
7-13
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