ARM920T_14 Datasheet, PDF (70/350 Pages) ATMEL Corporation – Technical Reference Manual

Memory Management Unit
If a large page descriptor is included in a fine page table, the high-order six bits of the
page index and low-order six bits of the fine page table index overlap. Each fine page
table entry for a large page must therefore be duplicated 64 times.
3.3.10 Translating small page references
Figure 3-11 shows the complete translation sequence for a 4KB small page.
Modified virtual address
31
20 19
12 11
0
Table index
Level 2
table index
Page index
Translation table base
31
14 13
0
Translation base
31
14 13
210
Translation base
Table index ^{0 0}
Level one descriptor
31
10 9 8
543210
Coarse page table base address
Domain 1
01
31
10 9
210
Coarse page table base address
L2 table index 0 0
Level two descriptor
31
12 11 10 9 8 7 6 5 4 3 2 1 0
Page base address
ap3 ap2 ap1 ap0 C B 1 0
Physical address
31
12 11
0
Page base address
Page index
Figure 3-11 Small page translation from a coarse page table
3-18
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