diff options
| author | Vincentius Robby <acolyte@umich.edu> | 2007-08-08 14:18:09 -0400 |
|---|---|---|
| committer | Vincentius Robby <acolyte@umich.edu> | 2007-08-08 14:18:09 -0400 |
| commit | 13d10e844c7465b4f7375da6e196cd36ffd0e37d (patch) | |
| tree | 5ce24f04043b232bb7a658884f5e8adbf7f68d2e /src/arch/alpha/tlb.cc | |
| parent | ef32494e723283c5a0a8c27bcb657a0e9ca9e25c (diff) | |
| download | gem5-13d10e844c7465b4f7375da6e196cd36ffd0e37d.tar.xz | |
alpha: Make the TLB cache to actually work.
Improve MRU checking for StaticInst, Bus, TLB
--HG--
extra : convert_revision : 9116b5655cd2986aeb4205438aad4a0f5a440006
Diffstat (limited to 'src/arch/alpha/tlb.cc')
| -rw-r--r-- | src/arch/alpha/tlb.cc | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/src/arch/alpha/tlb.cc b/src/arch/alpha/tlb.cc index 205b81baf..16aaca54d 100644 --- a/src/arch/alpha/tlb.cc +++ b/src/arch/alpha/tlb.cc @@ -80,16 +80,21 @@ TLB::lookup(Addr vpn, uint8_t asn) const // assume not found... PTE *retval = NULL; - if (PTECache[0] && vpn == PTECache[0]->tag && - (PTECache[0]->asma || PTECache[0]->asn == asn)) - retval = PTECache[0]; - else if (PTECache[1] && vpn == PTECache[1]->tag && - (PTECache[1]->asma || PTECache[1]->asn == asn)) - retval = PTECache[1]; - else if (PTECache[2] && vpn == PTECache[2]->tag && - (PTECache[2]->asma || PTECache[2]->asn == asn)) - retval = PTECache[2]; - else { + if (PTECache[0]) { + if (vpn == PTECache[0]->tag && + (PTECache[0]->asma || PTECache[0]->asn == asn)) + retval = PTECache[0]; + else if (PTECache[1]) { + if (vpn == PTECache[1]->tag && + (PTECache[1]->asma || PTECache[1]->asn == asn)) + retval = PTECache[1]; + else if (PTECache[2] && vpn == PTECache[2]->tag && + (PTECache[2]->asma || PTECache[2]->asn == asn)) + retval = PTECache[2]; + } + } + + if (retval == NULL) PageTable::const_iterator i = lookupTable.find(vpn); if (i != lookupTable.end()) { while (i->first == vpn) { @@ -98,6 +103,9 @@ TLB::lookup(Addr vpn, uint8_t asn) const assert(pte->valid); if (vpn == pte->tag && (pte->asma || pte->asn == asn)) { retval = pte; + PTECache[2] = PTECache[1]; + PTECache[1] = PTECache[0]; + PTECache[0] = pte; break; } |