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Memory Management Unit (MMU)
94
NS9750 Hardware Reference
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 be duplicated four times.
Translating tiny page references
Figure 35: Tiny page translation from a fine page table
31 14 13 0
Translation base
1
Translation table base
31 14 13 0
Translation base
2
Table index 0 0
31 2019 0
Table index Page index
First-level descriptor
31 0
Fine page table base address
2
11
1345
Domain 1
31 0
Fine page table base address
Level two
table index
10 9
Modified virtual address
81112
121112
31 109 6543210
00L2 table index
11BCAPPage base address
Page base address
31 010 9
Page index
Physical address
Second-level descriptor