SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
Each first-level descriptor provides either the complete address translation for 1-MiB or 16-MiB sections or provides a pointer to a second-level translation table for 4 KiB or 64 KiB pages. Table 22-4 shows the first-level descriptor format.
| First-Level Descriptor Format | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 31:24 | 23:20 | 19 | 18 | 17:10 | 9:2 | 1 | 0 | ||||||||
| X | 0 | 0 | Fault | ||||||||||||
| Second-Level Translation Table Base Address | X | 0 | 1 | Page | |||||||||||
| Section Base Address | X | 0 | X | 1 | 0 | Section | |||||||||
| Supersection Base Address | X | 1 | X | 1 | 0 | Supersection | |||||||||
| X | 1 | 1 | Fault | ||||||||||||
X = Don't care. Set to 0 for future compatibility.