This field defines the boundary address offset where the HSELx client security
region splits into two Security Areas with access controlled according to the
corresponding MATRIX_SSR. It also defines the Security Low Area size inside the HSELx
region.
If this Low Area size is set at or above the HSELx Region Size, then the Security High Area is no longer available and the MATRIX_SSR settings for the Low Area apply to the entire HSELx Security Region.
When applicable to a client region, the initial value of MATRIX_SASSRx.SASPLITy is
0xF. When not applicable to a client region, the initial value of
MATRIX_SASSRx.SASPLITy is 0x0.
| SASPLITx | Split Offset | Security Low Area Size |
|---|
| 0000 | 0x00001000 | 4 Kbytes |
| 0001 | 0x00002000 | 8 Kbytes |
| 0010 | 0x00004000 | 16 Kbytes |
| 0011 | 0x00008000 | 32 Kbytes |
| 0100 | 0x00010000 | 64 Kbytes |
| 0101 | 0x00020000 | 128 Kbytes |
| 0110 | 0x00040000 | 256 Kbytes |
| 0111 | 0x00080000 | 512 Kbytes |
| 1000 | 0x00100000 | 1 Mbyte |
| 1001 | 0x00200000 | 2 Mbytes |
| 1010 | 0x00400000 | 4 Mbytes |
| 1011 | 0x00800000 | 8 Mbytes |
| 1100 | 0x01000000 | 16 Mbytes |
| 1101 | 0x02000000 | 32 Mbytes |
| 1110 | 0x04000000 | 64 Mbytes |
| 1111 | 0x08000000 | 128 Mbytes |
