SPRUHZ7K August 2015 – April 2024 AM5706 , AM5708 , AM5716 , AM5718 , AM5718-HIREL
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 20-4 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.