Samsung S3C2500B User Manual page 108

PROGRAMMER' ' S MODEL
Each protection region register has the format shown in Table 2-16.
31:12
11:6
5:1
0
The region base must be aligned to an area size boundary, where the area size is defined in its respective
protection region register. The behavior is undefined if this is not the case. Area sizes are given in Table 2-17.
Bit encoding
00000 to 01010
01011
01100
01101
01110
01111
10000
10001
10010
10011
10100
2.16.1.7.1 Example Base Setting
An 8KB size region aligned to the 8KB boundary at 0x00002000 (covering the address range 0x00002000–
0x00003fff) would be programmed to 0x00002019.
2-28
Table 2-16. CP15 Protection Region Register Format
Register bit
Base address
Unused
Area size (See Table 2-17)
Region enable. Reset to disable (0).
Table 2-17. Area Size Encoding
Area size
Reserved
4KB
8KB
16KB
32KB
64KB
128KB
256KB
512KB
1MB
2MB
Function
Bit encoding
10101
10110
10111
11000
11001
11010
11011
11100
11101
11110
11111
S3C2500B
Area size
4MB
8MB
16MB
32MB
64MB
128MB
256MB
512MB
1GB
2GB
4GB