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CSR: mark misa as unwritable #213

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Merged
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Nov 6, 2024
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CSR: mark misa as unwritable #213

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2 changes: 1 addition & 1 deletion src/main/scala/nutcore/backend/fu/CSR.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -449,7 +449,7 @@ class CSR(implicit val p: NutCoreConfig) extends NutCoreModule with HasCSRConst{

// Machine Trap Setup
MaskedRegMap(Mstatus, mstatus, mstatusWMask, mstatusUpdateSideEffect),
MaskedRegMap(Misa, misa), // now MXL, EXT is not changeable
MaskedRegMap(Misa, misa, 0.U, MaskedRegMap.Unwritable),
MaskedRegMap(Medeleg, medeleg, "hbbff".U(64.W)),
MaskedRegMap(Mideleg, mideleg, "h222".U(64.W)),
MaskedRegMap(Mie, mie),
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