diff options
| -rw-r--r-- | mips/mips_prelude.sail | 7 | ||||
| -rw-r--r-- | mips/mips_tlb.sail | 2 |
2 files changed, 8 insertions, 1 deletions
diff --git a/mips/mips_prelude.sail b/mips/mips_prelude.sail index a4098486..382e4d7f 100644 --- a/mips/mips_prelude.sail +++ b/mips/mips_prelude.sail @@ -472,6 +472,13 @@ function AccessLevel getAccessLevel() = case _ -> User (* behaviour undefined, assume user *) } +function ([|2|]) int_of_accessLevel((AccessLevel)x) = + switch (x) { + case User -> 0 + case Supervisor -> 1 + case Kernel -> 2 + } + function unit checkCP0Access () = { let accessLevel = getAccessLevel() in diff --git a/mips/mips_tlb.sail b/mips/mips_tlb.sail index 2e40deed..d72e0e75 100644 --- a/mips/mips_tlb.sail +++ b/mips/mips_tlb.sail @@ -108,7 +108,7 @@ function (bit[64], bool) TLBTranslateC ((bit[64]) vAddr, (MemAccessType) accessT case 0b01 -> (Supervisor, None) (* xsseg - supervisor mapped *) case 0b00 -> (User, None) (* xuseg - user mapped *) } in - if (((nat)currentAccessLevel) < ((nat)requiredLevel)) then + if ((int_of_accessLevel(currentAccessLevel)) < (int_of_accessLevel(requiredLevel))) then (SignalExceptionBadAddr(if (accessType == StoreData) then AdES else AdEL, vAddr)) else let (pa, c) = switch(addr) { |