Value | Meaning |
---|---|
0 | Full read/write access in both privileged and unprivileged CPU modes |
1 | Read/write in privileged modes, read-only in unprivileged modes |
2 | Read-only in both privileged and unprivileged modes |
3 | Read/write in privileged modes, inaccessible in unprivileged modes |
4-15 | Reserved |