21.5.13 MSS DDR Bridge Non-Bufferable Size Control Register

Table 21-17. DDRB_NB_SIZE_CR
Bit Number	Name	Reset Value	Description
[31:4]	Reserved	0
[3:0]	DDRB_NB_SZ	0x1	Size of non-bufferable address region [(2N – 1x64) KB]. The region sizes are as shown in Table 21-18.

The following table lists the size of the non-bufferable region, given by the formula [(2N – 1x64)] KB.

Table 21-18. Non-Bufferable Region
Bit 0	Bit 1	Bit 2	Bit 3	N	Non-Bufferable Region
0	0	0	0	0	No non-bufferable region
0	0	0	1	1	64 KB = (21 – 1 x 64) KB
0	0	1	0	2	128 KB = (22 – 1 x 64) KB
0	0	1	1	3	256 KB = (23 – 1 x 64) KB
0	1	0	0	4	512 KB = (24 – 1 x 64) KB
0	1	0	1	5	1 MB = (25 – 1 x 64) KB
0	1	1	0	6	2 MB = (26 – 1 x 64) KB
0	1	1	1	7	4 MB = (27 – 1 x 64) KB
1	0	0	0	8	8 MB= (28 – 1 x 64) KB
1	0	0	1	9	16 MB = (29 – 1 x 64) KB
1	0	1	0	10	32 MB = (210 – 1 x 64) KB
1	0	1	1	11	64 MB = (211 – 1 x 64) KB
1	1	0	0	12	128 MB = (212 – 1 x 64) KB
1	1	0	1	13	256 MB = (213 – 1 x 64) KB
1	1	1	0	14	512 MB = (214 – 1 x 64) KB
1	1	1	1	15	1 GB = (215 – 1 x 64) KB: Entire region is non-bufferable