diff options
| -rw-r--r-- | src/machine.tex | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/machine.tex b/src/machine.tex index 043d584..2ae1756 100644 --- a/src/machine.tex +++ b/src/machine.tex @@ -3346,7 +3346,8 @@ PMP entries are described by an 8-bit configuration register and one MXLEN-bit address register. Some PMP settings additionally use the address register associated with the preceding PMP entry. Up to 64 PMP entries are supported. -Implementations may implement zero, 16, or 64 PMP CSRs. +Implementations may implement zero, 16, or 64 PMP CSRs; the lowest-numbered +PMP CSRs must be implemented first. All PMP CSR fields are \warl\ and may be hardwired to zero. PMP CSRs are only accessible to M-mode. |