Metavalue cleanup for pmu.vhdl

Signed-off-by: Michael Neuling <mikey@neuling.org>
3 years ago · 7a3e5cac3b
parent 43e62dbd9e
commit 7a3e5cac3b
1 changed files with 5 additions and 1 deletions
--- a/pmu.vhdl
+++ b/pmu.vhdl
@ -217,7 +217,11 @@ begin

        -- Check for timebase events
        tbdiff := p_in.tbbits and not prev_tb;
-        tbbit := tbdiff(3 - to_integer(unsigned(mmcr0(MMCR0_TBSEL + 1 downto MMCR0_TBSEL))));
+        if is_X(mmcr0) then
+            tbbit := 'X';
+        else
+            tbbit := tbdiff(3 - to_integer(unsigned(mmcr0(MMCR0_TBSEL + 1 downto MMCR0_TBSEL))));
+        end if;
        if tbbit = '1' and mmcr0(MMCR0_TBEE) = '1' then
            event := '1';
        end if;