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Diffstat (limited to 'src/arch/sparc/tlb.cc')
-rw-r--r--src/arch/sparc/tlb.cc153
1 files changed, 92 insertions, 61 deletions
diff --git a/src/arch/sparc/tlb.cc b/src/arch/sparc/tlb.cc
index 293f667d6..82b1ed175 100644
--- a/src/arch/sparc/tlb.cc
+++ b/src/arch/sparc/tlb.cc
@@ -204,7 +204,8 @@ insertAllLocked:
TlbEntry*
-TLB::lookup(Addr va, int partition_id, bool real, int context_id)
+TLB::lookup(Addr va, int partition_id, bool real, int context_id, bool
+ update_used)
{
MapIter i;
TlbRange tr;
@@ -230,7 +231,10 @@ TLB::lookup(Addr va, int partition_id, bool real, int context_id)
t = i->second;
DPRINTF(TLB, "TLB: Valid entry found pa: %#x size: %#x\n", t->pte.paddr(),
t->pte.size());
- if (!t->used) {
+
+ // Update the used bits only if this is a real access (not a fake one from
+ // virttophys()
+ if (!t->used && update_used) {
t->used = true;
usedEntries++;
if (usedEntries == size) {
@@ -797,13 +801,11 @@ handleQueueRegAccess:
handleSparcErrorRegAccess:
if (!hpriv) {
- if (priv) {
- writeSfr(tc, vaddr, write, Primary, true, IllegalAsi, asi);
+ writeSfr(tc, vaddr, write, Primary, true, IllegalAsi, asi);
+ if (priv)
return new DataAccessException;
- } else {
- writeSfr(tc, vaddr, write, Primary, true, IllegalAsi, asi);
+ else
return new PrivilegedAction;
- }
}
goto regAccessOk;
@@ -821,8 +823,7 @@ DTB::doMmuRegRead(ThreadContext *tc, Packet *pkt)
{
Addr va = pkt->getAddr();
ASI asi = (ASI)pkt->req->getAsi();
- uint64_t temp, data;
- uint64_t tsbtemp, cnftemp;
+ uint64_t temp;
DPRINTF(IPR, "Memory Mapped IPR Read: asi=%#X a=%#x\n",
(uint32_t)pkt->req->getAsi(), pkt->getAddr());
@@ -942,64 +943,36 @@ DTB::doMmuRegRead(ThreadContext *tc, Packet *pkt)
}
break;
case ASI_DMMU_TSB_PS0_PTR_REG:
- temp = tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_TAG_ACCESS);
- if (bits(temp,12,0) == 0) {
- tsbtemp = tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_C0_TSB_PS0);
- cnftemp = tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_C0_CONFIG);
- } else {
- tsbtemp = tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_CX_TSB_PS0);
- cnftemp = tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_CX_CONFIG);
- }
- data = mbits(tsbtemp,63,13);
- data |= temp >> (9 + bits(cnftemp,2,0) * 3) &
- mbits((uint64_t)-1ll,12+bits(tsbtemp,3,0), 4);
- pkt->set(data);
+ pkt->set(MakeTsbPtr(Ps0,
+ tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_TAG_ACCESS),
+ tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_C0_TSB_PS0),
+ tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_C0_CONFIG),
+ tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_CX_TSB_PS0),
+ tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_CX_CONFIG)));
break;
case ASI_DMMU_TSB_PS1_PTR_REG:
- temp = tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_TAG_ACCESS);
- if (bits(temp,12,0) == 0) {
- tsbtemp = tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_C0_TSB_PS1);
- cnftemp = tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_C0_CONFIG);
- } else {
- tsbtemp = tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_CX_TSB_PS1);
- cnftemp = tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_CX_CONFIG);
- }
- data = mbits(tsbtemp,63,13);
- if (bits(tsbtemp,12,12))
- data |= ULL(1) << (13+bits(tsbtemp,3,0));
- data |= temp >> (9 + bits(cnftemp,10,8) * 3) &
- mbits((uint64_t)-1ll,12+bits(tsbtemp,3,0), 4);
- pkt->set(data);
+ pkt->set(MakeTsbPtr(Ps1,
+ tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_TAG_ACCESS),
+ tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_C0_TSB_PS1),
+ tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_C0_CONFIG),
+ tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_CX_TSB_PS1),
+ tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_CX_CONFIG)));
break;
case ASI_IMMU_TSB_PS0_PTR_REG:
- temp = tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_TAG_ACCESS);
- if (bits(temp,12,0) == 0) {
- tsbtemp = tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_C0_TSB_PS0);
- cnftemp = tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_C0_CONFIG);
- } else {
- tsbtemp = tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_CX_TSB_PS0);
- cnftemp = tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_CX_CONFIG);
- }
- data = mbits(tsbtemp,63,13);
- data |= temp >> (9 + bits(cnftemp,2,0) * 3) &
- mbits((uint64_t)-1ll,12+bits(tsbtemp,3,0), 4);
- pkt->set(data);
+ pkt->set(MakeTsbPtr(Ps0,
+ tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_TAG_ACCESS),
+ tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_C0_TSB_PS0),
+ tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_C0_CONFIG),
+ tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_CX_TSB_PS0),
+ tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_CX_CONFIG)));
break;
case ASI_IMMU_TSB_PS1_PTR_REG:
- temp = tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_TAG_ACCESS);
- if (bits(temp,12,0) == 0) {
- tsbtemp = tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_C0_TSB_PS1);
- cnftemp = tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_C0_CONFIG);
- } else {
- tsbtemp = tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_CX_TSB_PS1);
- cnftemp = tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_CX_CONFIG);
- }
- data = mbits(tsbtemp,63,13);
- if (bits(tsbtemp,12,12))
- data |= ULL(1) << (13+bits(tsbtemp,3,0));
- data |= temp >> (9 + bits(cnftemp,10,8) * 3) &
- mbits((uint64_t)-1ll,12+bits(tsbtemp,3,0), 4);
- pkt->set(data);
+ pkt->set(MakeTsbPtr(Ps1,
+ tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_TAG_ACCESS),
+ tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_C0_TSB_PS1),
+ tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_C0_CONFIG),
+ tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_CX_TSB_PS1),
+ tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_CX_CONFIG)));
break;
default:
@@ -1245,6 +1218,64 @@ doMmuWriteError:
}
void
+DTB::GetTsbPtr(ThreadContext *tc, Addr addr, int ctx, Addr *ptrs)
+{
+ uint64_t tag_access = mbits(addr,63,13) | mbits(ctx,12,0);
+ ptrs[0] = MakeTsbPtr(Ps0, tag_access,
+ tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_C0_TSB_PS0),
+ tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_C0_CONFIG),
+ tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_CX_TSB_PS0),
+ tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_CX_CONFIG));
+ ptrs[1] = MakeTsbPtr(Ps1, tag_access,
+ tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_C0_TSB_PS1),
+ tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_C0_CONFIG),
+ tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_CX_TSB_PS1),
+ tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_CX_CONFIG));
+ ptrs[2] = MakeTsbPtr(Ps0, tag_access,
+ tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_C0_TSB_PS0),
+ tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_C0_CONFIG),
+ tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_CX_TSB_PS0),
+ tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_CX_CONFIG));
+ ptrs[3] = MakeTsbPtr(Ps1, tag_access,
+ tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_C0_TSB_PS1),
+ tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_C0_CONFIG),
+ tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_CX_TSB_PS1),
+ tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_CX_CONFIG));
+}
+
+
+
+
+
+uint64_t
+DTB::MakeTsbPtr(TsbPageSize ps, uint64_t tag_access, uint64_t c0_tsb,
+ uint64_t c0_config, uint64_t cX_tsb, uint64_t cX_config)
+{
+ uint64_t tsb;
+ uint64_t config;
+
+ if (bits(tag_access, 12,0) == 0) {
+ tsb = c0_tsb;
+ config = c0_config;
+ } else {
+ tsb = cX_tsb;
+ config = cX_config;
+ }
+
+ uint64_t ptr = mbits(tsb,63,13);
+ bool split = bits(tsb,12,12);
+ int tsb_size = bits(tsb,3,0);
+ int page_size = (ps == Ps0) ? bits(config, 2,0) : bits(config,10,8);
+
+ if (ps == Ps1 && split)
+ ptr |= ULL(1) << (13 + tsb_size);
+ ptr |= (tag_access >> (9 + page_size * 3)) & mask(12+tsb_size, 4);
+
+ return ptr;
+}
+
+
+void
TLB::serialize(std::ostream &os)
{
SERIALIZE_SCALAR(size);
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-30 10:27:35 +0000