fix smul and sdiv to sign extend, and handle overflow/underflow corretly

Only allow writing/reading of 32 bits of Y
Only allow writing/reading 32 bits of pc when pstate.am
Put any loaded data on the first half of a micro-op in uReg0 so it can't
overwrite the register we are using for address calculation
only erase a entry from the lookup table if it's valid
Put in a temporary check to make sure that lookup table and tlb array stay in sync
if we are interrupted in the middle of a mico-op, reset the micropc/nexpc
so we start  on the first part of it when we come back

src/arch/sparc/isa/decoder.isa:
    fix smul and sdiv to sign extend, and handle overflow/underflow corretly
    Only allow writing/reading of 32 bits of Y
    Only allow writing/reading 32 bits of pc when pstate.am
    Put any loaded data on the first half of a micro-op in uReg0 so it can't
    overwrite the register we are using for address calculation
src/arch/sparc/isa/formats/mem/blockmem.isa:
    Put any loaded data on the first half of a micro-op in uReg0 so it can't
    overwrite the register we are using for address calculation
src/arch/sparc/isa/includes.isa:
    Use limits for 32bit underflow/overflow detection
src/arch/sparc/tlb.cc:
    only erase a entry from the lookup table if it's valid
    Put in a temporary check to make sure that lookup table and tlb array stay in sync
src/arch/sparc/tlb_map.hh:
    add a print function to dump the tlb lookup table
src/cpu/simple/base.cc:
    if we are interrupted in the middle of a mico-op, reset the micropc/nexpc
    so we start  on the first part of it when we come back

--HG--
extra : convert_revision : 50a23837fd888393a5c2aa35cbd1abeebb7f55d4

1 files changed, 5 insertions, 2 deletions

diff --git a/src/arch/sparc/tlb.cc b/src/arch/sparc/tlb.cc
index 0e59f3e15..bf57c894f 100644
--- a/src/arch/sparc/tlb.cc
+++ b/src/arch/sparc/tlb.cc
@@ -170,8 +170,8 @@ insertAllLocked:
     freeList.remove(new_entry);
     if (new_entry->valid && new_entry->used)
         usedEntries--;
-
-    lookupTable.erase(new_entry->range);
+    if (new_entry->valid)
+        lookupTable.erase(new_entry->range);
 
 
     DPRINTF(TLB, "Using entry: %#X\n", new_entry);
@@ -582,6 +582,9 @@ DTB::translate(RequestPtr &req, ThreadContext *tc, bool write)
     DPRINTF(TLB, "TLB: DTB Request to translate va=%#x size=%d asi=%#x\n",
             vaddr, size, asi);
 
+    if (lookupTable.size() != 64 - freeList.size())
+       panic("Lookup table size: %d tlb size: %d\n", lookupTable.size(),
+               freeList.size());
     if (asi == ASI_IMPLICIT)
         implicit = true;