s3c2410a Samsung Semiconductor, Inc., s3c2410a Datasheet - Page 566

• Manufacturer Part Number: s3c2410a
• Description: 16/32-bit Risc Arm Microprocessor
• Manufacturer: Samsung Semiconductor, Inc.

MMU
TRANSLATING SMALL PAGE REFERENCES
Figure 3-8 illustrates the complete translation sequence for a 4KB small page. 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.
3-14
31
31
31
31
31
31
31
Table index
Figure 3-8. Small Page Translation from a Coarse Page Table
Coarse page table base address
Coarse page table base address
Translation base
Translation base
Page base address
Page base address
12
18
20
Modified virtual address
19
Translation table base
Level one descriptor
Level two descriptor
Physical address
L2 table index
14
14
13
13
8
12 11
12
12 11
11
ap3
10 9 8
10
10 9 8
Table index
9
ap2
L2 table index
Domain
Page index
Page index
7 6
ap1
5
5
ap0
4
1
4
ARM920T PROCESSOR
C
3
3
B
2
2
2
2
1
0
1
0
1
0
1
1
0
0
0
0
0
1
0
0
0
0
0
12