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| author | Andrew Waterman <andrew@sifive.com> | 2018-04-03 02:32:47 -0700 |
|---|---|---|
| committer | Andrew Waterman <andrew@sifive.com> | 2018-04-03 02:32:47 -0700 |
| commit | a9d7704765360679c1a5e3fa06e0b0e41d6c5f26 (patch) | |
| tree | cb342f57c431564e13a641c5d5c70ddcc375574d /src | |
| parent | b0942ddf2f5a2fa8b6e8c16559751ffb75b52b5b (diff) | |
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Fix description of PMP granularity probing mechanism
Diffstat (limited to 'src')
| -rw-r--r-- | src/machine.tex | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/machine.tex b/src/machine.tex index 6d71a3b..357e6da 100644 --- a/src/machine.tex +++ b/src/machine.tex @@ -2836,9 +2836,9 @@ not affect the address-matching logic. \begin{commentary} Software may determine the PMP granularity by writing zero to {\tt pmp0cfg}, -then writing zero to {\tt pmpaddr0}, then reading back {\tt pmpaddr0}. -If the result is zero, the PMP granularity is four bytes. If {\em L} -bits are set, the PMP granularity is $2^{L+2}$ bytes. +then writing all ones to {\tt pmpaddr0}, then reading back {\tt pmpaddr0}. +If $L$ is the index of the least-significant bit set, +the PMP granularity is $2^{L+2}$ bytes. \end{commentary} \subsubsection*{Locking and Privilege Mode} |