From 13d10e844c7465b4f7375da6e196cd36ffd0e37d Mon Sep 17 00:00:00 2001 From: Vincentius Robby Date: Wed, 8 Aug 2007 14:18:09 -0400 Subject: alpha: Make the TLB cache to actually work. Improve MRU checking for StaticInst, Bus, TLB --HG-- extra : convert_revision : 9116b5655cd2986aeb4205438aad4a0f5a440006 --- src/arch/alpha/tlb.cc | 28 ++++++++++++++++++---------- 1 file changed, 18 insertions(+), 10 deletions(-) (limited to 'src/arch/alpha/tlb.cc') 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; } -- cgit v1.2.3