2.3.7. Register 3, Write buffer control register

This register contains the write buffer control (bufferable) attribute for the eight areas of memory.

Note

This register only applies to data accesses.

To read and write the write buffer control register:

MCR p15, 0, rd, c3, c0, 0; write data bufferable bits
MRC p15, 0, rd, c3, c0, 0; read data bufferable bits

The format for the bufferable bits in the data areas is given in Table 2.11.

Table 2.11. Programming data bufferable bits

Register bit

Function

7

Bufferable bit (B_7) for data area 7

6

Bufferable bit (B_6) for data area 6

5

Bufferable bit (B_5) for data area 5

4

Bufferable bit (B_4) for data area 4

3

Bufferable bit (B_3) for data area 3

2

Bufferable bit (B_2) for data area 2

1

Bufferable bit (B_1) for data area 1

0

Bufferable bit (B_0) for data area 0

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