ARM926EJ datasheet(80/236 Pages) ETC2

80 / 236 page

Memory Management Unit

3-16

ARM DDI 0198E

Figure 3-10 Large page translation from a coarse page table

Because the upper four bits of the page index and low-order four bits of the coarse page

table index overlap, each coarse page table entry for a large page must be duplicated 16

times, in consecutive memory locations, in the coarse page table.

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.

Translation base

14 13

Translation base

14 13

2 1 0

Table index

0 0

Modified virtual address

Translation table base

Table index

20 19

16 15

12 11

table index

Page index

Coarse page table base address

10 98

543210

Domain

0 1

Coarse page table base address

10 9

2 1 0

L2 table index

0 0

Page base address

16 15

12 11 10 9876543210

AP3

AP2

AP1

AP0 C B 0 1

Page base address

16 15

Page index

First-level descriptor

Second-level descriptor

Physical address

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