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-rw-r--r--src/arch/alpha/faults.cc29
-rw-r--r--src/arch/arm/remote_gdb.cc9
-rw-r--r--src/arch/mips/remote_gdb.cc11
-rw-r--r--src/arch/power/remote_gdb.cc17
-rw-r--r--src/arch/riscv/remote_gdb.cc7
-rw-r--r--src/arch/sparc/faults.cc232
-rw-r--r--src/arch/sparc/remote_gdb.cc9
-rw-r--r--src/arch/x86/remote_gdb.cc3
-rw-r--r--src/arch/x86/tlb.cc15
-rw-r--r--src/arch/x86/tlb.hh2
-rw-r--r--src/gpu-compute/gpu_tlb.cc72
-rw-r--r--src/mem/page_table.cc18
-rw-r--r--src/mem/page_table.hh4
13 files changed, 194 insertions, 234 deletions
diff --git a/src/arch/alpha/faults.cc b/src/arch/alpha/faults.cc
index 4a829cd9b..89b0ecea8 100644
--- a/src/arch/alpha/faults.cc
+++ b/src/arch/alpha/faults.cc
@@ -196,14 +196,11 @@ ItbPageFault::invoke(ThreadContext *tc, const StaticInstPtr &inst)
}
Process *p = tc->getProcessPtr();
- TlbEntry entry;
- bool success = p->pTable->lookup(pc, entry);
- if (!success) {
- panic("Tried to execute unmapped address %#x.\n", pc);
- } else {
- VAddr vaddr(pc);
- dynamic_cast<TLB *>(tc->getITBPtr())->insert(vaddr.page(), entry);
- }
+ TlbEntry *entry = p->pTable->lookup(pc);
+ panic_if(!entry, "Tried to execute unmapped address %#x.\n", pc);
+
+ VAddr vaddr(pc);
+ dynamic_cast<TLB *>(tc->getITBPtr())->insert(vaddr.page(), *entry);
}
void
@@ -215,17 +212,11 @@ NDtbMissFault::invoke(ThreadContext *tc, const StaticInstPtr &inst)
}
Process *p = tc->getProcessPtr();
- TlbEntry entry;
- bool success = p->pTable->lookup(vaddr, entry);
- if (!success) {
- if (p->fixupStackFault(vaddr))
- success = p->pTable->lookup(vaddr, entry);
- }
- if (!success) {
- panic("Tried to access unmapped address %#x.\n", (Addr)vaddr);
- } else {
- dynamic_cast<TLB *>(tc->getDTBPtr())->insert(vaddr.page(), entry);
- }
+ TlbEntry *entry = p->pTable->lookup(vaddr);
+ if (!entry && p->fixupStackFault(vaddr))
+ entry = p->pTable->lookup(vaddr);
+ panic_if(!entry, "Tried to access unmapped address %#x.\n", (Addr)vaddr);
+ dynamic_cast<TLB *>(tc->getDTBPtr())->insert(vaddr.page(), *entry);
}
} // namespace AlphaISA
diff --git a/src/arch/arm/remote_gdb.cc b/src/arch/arm/remote_gdb.cc
index f12734182..f1919372b 100644
--- a/src/arch/arm/remote_gdb.cc
+++ b/src/arch/arm/remote_gdb.cc
@@ -186,12 +186,9 @@ RemoteGDB::acc(Addr va, size_t len)
DPRINTF(GDBAcc, "acc: %#x mapping is valid\n", va);
return true;
} else {
- TlbEntry entry;
- //Check to make sure the first byte is mapped into the processes address
- //space.
- if (context()->getProcessPtr()->pTable->lookup(va, entry))
- return true;
- return false;
+ // Check to make sure the first byte is mapped into the processes
+ // address space.
+ return context()->getProcessPtr()->pTable->lookup(va) != nullptr;
}
}
diff --git a/src/arch/mips/remote_gdb.cc b/src/arch/mips/remote_gdb.cc
index e17f8fd1d..d490fa518 100644
--- a/src/arch/mips/remote_gdb.cc
+++ b/src/arch/mips/remote_gdb.cc
@@ -162,13 +162,10 @@ RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc, int _port)
bool
RemoteGDB::acc(Addr va, size_t len)
{
- TlbEntry entry;
- //Check to make sure the first byte is mapped into the processes address
- //space.
- if (FullSystem)
- panic("acc not implemented for MIPS FS!");
- else
- return context()->getProcessPtr()->pTable->lookup(va, entry);
+ // Check to make sure the first byte is mapped into the processes address
+ // space.
+ panic_if(FullSystem, "acc not implemented for MIPS FS!");
+ return context()->getProcessPtr()->pTable->lookup(va) != nullptr;
}
void
diff --git a/src/arch/power/remote_gdb.cc b/src/arch/power/remote_gdb.cc
index 7bdd3ba6a..b4082e0ee 100644
--- a/src/arch/power/remote_gdb.cc
+++ b/src/arch/power/remote_gdb.cc
@@ -162,16 +162,13 @@ RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc, int _port)
bool
RemoteGDB::acc(Addr va, size_t len)
{
- TlbEntry entry;
- //Check to make sure the first byte is mapped into the processes address
- //space. At the time of this writing, the acc() check is used when
- //processing the MemR/MemW packets before actually asking the translating
- //port proxy to read/writeBlob. I (bgs) am not convinced the first byte
- //check is enough.
- if (FullSystem)
- panic("acc not implemented for POWER FS!");
- else
- return context()->getProcessPtr()->pTable->lookup(va, entry);
+ // Check to make sure the first byte is mapped into the processes address
+ // space. At the time of this writing, the acc() check is used when
+ // processing the MemR/MemW packets before actually asking the translating
+ // port proxy to read/writeBlob. I (bgs) am not convinced the first byte
+ // check is enough.
+ panic_if(FullSystem, "acc not implemented for POWER FS!");
+ return context()->getProcessPtr()->pTable->lookup(va) != nullptr;
}
void
diff --git a/src/arch/riscv/remote_gdb.cc b/src/arch/riscv/remote_gdb.cc
index 4f423fc01..f4e606e27 100644
--- a/src/arch/riscv/remote_gdb.cc
+++ b/src/arch/riscv/remote_gdb.cc
@@ -156,11 +156,8 @@ RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc, int _port)
bool
RemoteGDB::acc(Addr va, size_t len)
{
- TlbEntry entry;
- if (FullSystem)
- panic("acc not implemented for RISCV FS!");
- else
- return context()->getProcessPtr()->pTable->lookup(va, entry);
+ panic_if(FullSystem, "acc not implemented for RISCV FS!");
+ return context()->getProcessPtr()->pTable->lookup(va) != nullptr;
}
void
diff --git a/src/arch/sparc/faults.cc b/src/arch/sparc/faults.cc
index 5466115d0..0b6a28927 100644
--- a/src/arch/sparc/faults.cc
+++ b/src/arch/sparc/faults.cc
@@ -629,49 +629,46 @@ FastInstructionAccessMMUMiss::invoke(ThreadContext *tc,
}
Process *p = tc->getProcessPtr();
- TlbEntry entry;
- bool success = p->pTable->lookup(vaddr, entry);
- if (!success) {
- panic("Tried to execute unmapped address %#x.\n", vaddr);
- } else {
- Addr alignedvaddr = p->pTable->pageAlign(vaddr);
-
- // Grab fields used during instruction translation to figure out
- // which context to use.
- uint64_t tlbdata = tc->readMiscRegNoEffect(MISCREG_TLB_DATA);
-
- // Inside a VM, a real address is the address that guest OS would
- // interpret to be a physical address. To map to the physical address,
- // it still needs to undergo a translation. The instruction
- // translation code in the SPARC ITLB code assumes that the context is
- // zero (kernel-level) if real addressing is being used.
- bool is_real_address = !bits(tlbdata, 4);
-
- // The SPARC ITLB code assumes that traps are executed in context
- // zero so we carry that assumption through here.
- bool trapped = bits(tlbdata, 18, 16) > 0;
-
- // The primary context acts as a PASID. It allows the MMU to
- // distinguish between virtual addresses that would alias to the
- // same physical address (if two or more processes shared the same
- // virtual address mapping).
- int primary_context = bits(tlbdata, 47, 32);
-
- // The partition id distinguishes between virtualized environments.
- int const partition_id = 0;
-
- // Given the assumptions in the translateInst code in the SPARC ITLB,
- // the logic works out to the following for the context.
- int context_id = (is_real_address || trapped) ? 0 : primary_context;
-
- // Insert the TLB entry.
- // The entry specifying whether the address is "real" is set to
- // false for syscall emulation mode regardless of whether the
- // address is real in preceding code. Not sure sure that this is
- // correct, but also not sure if it matters at all.
- dynamic_cast<TLB *>(tc->getITBPtr())->
- insert(alignedvaddr, partition_id, context_id, false, entry.pte);
- }
+ TlbEntry *entry = p->pTable->lookup(vaddr);
+ panic_if(!entry, "Tried to execute unmapped address %#x.\n", vaddr);
+
+ Addr alignedvaddr = p->pTable->pageAlign(vaddr);
+
+ // Grab fields used during instruction translation to figure out
+ // which context to use.
+ uint64_t tlbdata = tc->readMiscRegNoEffect(MISCREG_TLB_DATA);
+
+ // Inside a VM, a real address is the address that guest OS would
+ // interpret to be a physical address. To map to the physical address,
+ // it still needs to undergo a translation. The instruction
+ // translation code in the SPARC ITLB code assumes that the context is
+ // zero (kernel-level) if real addressing is being used.
+ bool is_real_address = !bits(tlbdata, 4);
+
+ // The SPARC ITLB code assumes that traps are executed in context
+ // zero so we carry that assumption through here.
+ bool trapped = bits(tlbdata, 18, 16) > 0;
+
+ // The primary context acts as a PASID. It allows the MMU to
+ // distinguish between virtual addresses that would alias to the
+ // same physical address (if two or more processes shared the same
+ // virtual address mapping).
+ int primary_context = bits(tlbdata, 47, 32);
+
+ // The partition id distinguishes between virtualized environments.
+ int const partition_id = 0;
+
+ // Given the assumptions in the translateInst code in the SPARC ITLB,
+ // the logic works out to the following for the context.
+ int context_id = (is_real_address || trapped) ? 0 : primary_context;
+
+ // Insert the TLB entry.
+ // The entry specifying whether the address is "real" is set to
+ // false for syscall emulation mode regardless of whether the
+ // address is real in preceding code. Not sure sure that this is
+ // correct, but also not sure if it matters at all.
+ dynamic_cast<TLB *>(tc->getITBPtr())->
+ insert(alignedvaddr, partition_id, context_id, false, entry->pte);
}
void
@@ -683,83 +680,78 @@ FastDataAccessMMUMiss::invoke(ThreadContext *tc, const StaticInstPtr &inst)
}
Process *p = tc->getProcessPtr();
- TlbEntry entry;
- bool success = p->pTable->lookup(vaddr, entry);
- if (!success) {
- if (p->fixupStackFault(vaddr))
- success = p->pTable->lookup(vaddr, entry);
- }
- if (!success) {
- panic("Tried to access unmapped address %#x.\n", vaddr);
- } else {
- Addr alignedvaddr = p->pTable->pageAlign(vaddr);
-
- // Grab fields used during data translation to figure out
- // which context to use.
- uint64_t tlbdata = tc->readMiscRegNoEffect(MISCREG_TLB_DATA);
-
- // The primary context acts as a PASID. It allows the MMU to
- // distinguish between virtual addresses that would alias to the
- // same physical address (if two or more processes shared the same
- // virtual address mapping). There's a secondary context used in the
- // DTLB translation code, but it should __probably__ be zero for
- // syscall emulation code. (The secondary context is used by Solaris
- // to allow kernel privilege code to access user space code:
- // [ISBN 0-13-022496-0]:PG199.)
- int primary_context = bits(tlbdata, 47, 32);
-
- // "Hyper-Privileged Mode" is in use. There are three main modes of
- // operation for Sparc: Hyper-Privileged Mode, Privileged Mode, and
- // User Mode.
- int hpriv = bits(tlbdata, 0);
-
- // Reset, Error and Debug state is in use. Something horrible has
- // happened or the system is operating in Reset Mode.
- int red = bits(tlbdata, 1);
-
- // Inside a VM, a real address is the address that guest OS would
- // interpret to be a physical address. To map to the physical address,
- // it still needs to undergo a translation. The instruction
- // translation code in the SPARC ITLB code assumes that the context is
- // zero (kernel-level) if real addressing is being used.
- int is_real_address = !bits(tlbdata, 5);
-
- // Grab the address space identifier register from the thread context.
- // XXX: Inspecting how setMiscReg and setMiscRegNoEffect behave for
- // MISCREG_ASI causes me to think that the ASI register implementation
- // might be bugged. The NoEffect variant changes the ASI register
- // value in the architectural state while the normal variant changes
- // the context field in the thread context's currently decoded request
- // but does not directly affect the ASI register value in the
- // architectural state. The ASI values and the context field in the
- // request packet seem to have completely different uses.
- MiscReg reg_asi = tc->readMiscRegNoEffect(MISCREG_ASI);
- ASI asi = static_cast<ASI>(reg_asi);
-
- // The SPARC DTLB code assumes that traps are executed in context
- // zero if the asi value is ASI_IMPLICIT (which is 0x0). There's also
- // an assumption that the nucleus address space is being used, but
- // the context is the relevant issue since we need to pass it to TLB.
- bool trapped = bits(tlbdata, 18, 16) > 0;
-
- // Given the assumptions in the translateData code in the SPARC DTLB,
- // the logic works out to the following for the context.
- int context_id = ((!hpriv && !red && is_real_address) ||
- asiIsReal(asi) ||
- (trapped && asi == ASI_IMPLICIT))
- ? 0 : primary_context;
-
- // The partition id distinguishes between virtualized environments.
- int const partition_id = 0;
-
- // Insert the TLB entry.
- // The entry specifying whether the address is "real" is set to
- // false for syscall emulation mode regardless of whether the
- // address is real in preceding code. Not sure sure that this is
- // correct, but also not sure if it matters at all.
- dynamic_cast<TLB *>(tc->getDTBPtr())->
- insert(alignedvaddr, partition_id, context_id, false, entry.pte);
- }
+ TlbEntry *entry = p->pTable->lookup(vaddr);
+ if (!entry && p->fixupStackFault(vaddr))
+ entry = p->pTable->lookup(vaddr);
+ panic_if(!entry, "Tried to access unmapped address %#x.\n", vaddr);
+
+ Addr alignedvaddr = p->pTable->pageAlign(vaddr);
+
+ // Grab fields used during data translation to figure out
+ // which context to use.
+ uint64_t tlbdata = tc->readMiscRegNoEffect(MISCREG_TLB_DATA);
+
+ // The primary context acts as a PASID. It allows the MMU to
+ // distinguish between virtual addresses that would alias to the
+ // same physical address (if two or more processes shared the same
+ // virtual address mapping). There's a secondary context used in the
+ // DTLB translation code, but it should __probably__ be zero for
+ // syscall emulation code. (The secondary context is used by Solaris
+ // to allow kernel privilege code to access user space code:
+ // [ISBN 0-13-022496-0]:PG199.)
+ int primary_context = bits(tlbdata, 47, 32);
+
+ // "Hyper-Privileged Mode" is in use. There are three main modes of
+ // operation for Sparc: Hyper-Privileged Mode, Privileged Mode, and
+ // User Mode.
+ int hpriv = bits(tlbdata, 0);
+
+ // Reset, Error and Debug state is in use. Something horrible has
+ // happened or the system is operating in Reset Mode.
+ int red = bits(tlbdata, 1);
+
+ // Inside a VM, a real address is the address that guest OS would
+ // interpret to be a physical address. To map to the physical address,
+ // it still needs to undergo a translation. The instruction
+ // translation code in the SPARC ITLB code assumes that the context is
+ // zero (kernel-level) if real addressing is being used.
+ int is_real_address = !bits(tlbdata, 5);
+
+ // Grab the address space identifier register from the thread context.
+ // XXX: Inspecting how setMiscReg and setMiscRegNoEffect behave for
+ // MISCREG_ASI causes me to think that the ASI register implementation
+ // might be bugged. The NoEffect variant changes the ASI register
+ // value in the architectural state while the normal variant changes
+ // the context field in the thread context's currently decoded request
+ // but does not directly affect the ASI register value in the
+ // architectural state. The ASI values and the context field in the
+ // request packet seem to have completely different uses.
+ MiscReg reg_asi = tc->readMiscRegNoEffect(MISCREG_ASI);
+ ASI asi = static_cast<ASI>(reg_asi);
+
+ // The SPARC DTLB code assumes that traps are executed in context
+ // zero if the asi value is ASI_IMPLICIT (which is 0x0). There's also
+ // an assumption that the nucleus address space is being used, but
+ // the context is the relevant issue since we need to pass it to TLB.
+ bool trapped = bits(tlbdata, 18, 16) > 0;
+
+ // Given the assumptions in the translateData code in the SPARC DTLB,
+ // the logic works out to the following for the context.
+ int context_id = ((!hpriv && !red && is_real_address) ||
+ asiIsReal(asi) ||
+ (trapped && asi == ASI_IMPLICIT))
+ ? 0 : primary_context;
+
+ // The partition id distinguishes between virtualized environments.
+ int const partition_id = 0;
+
+ // Insert the TLB entry.
+ // The entry specifying whether the address is "real" is set to
+ // false for syscall emulation mode regardless of whether the
+ // address is real in preceding code. Not sure sure that this is
+ // correct, but also not sure if it matters at all.
+ dynamic_cast<TLB *>(tc->getDTBPtr())->
+ insert(alignedvaddr, partition_id, context_id, false, entry->pte);
}
void
diff --git a/src/arch/sparc/remote_gdb.cc b/src/arch/sparc/remote_gdb.cc
index baec0e7be..057cea150 100644
--- a/src/arch/sparc/remote_gdb.cc
+++ b/src/arch/sparc/remote_gdb.cc
@@ -163,16 +163,11 @@ RemoteGDB::acc(Addr va, size_t len)
// from va to va + len have valid page map entries. Not
// sure how this will work for other OSes or in general.
if (FullSystem) {
- if (va)
- return true;
- return false;
+ return va != 0;
} else {
- TlbEntry entry;
// Check to make sure the first byte is mapped into the processes
// address space.
- if (context()->getProcessPtr()->pTable->lookup(va, entry))
- return true;
- return false;
+ return context()->getProcessPtr()->pTable->lookup(va) != nullptr;
}
}
diff --git a/src/arch/x86/remote_gdb.cc b/src/arch/x86/remote_gdb.cc
index 175cabba3..956459373 100644
--- a/src/arch/x86/remote_gdb.cc
+++ b/src/arch/x86/remote_gdb.cc
@@ -88,8 +88,7 @@ RemoteGDB::acc(Addr va, size_t len)
BaseTLB::Read);
return fault == NoFault;
} else {
- TlbEntry entry;
- return context()->getProcessPtr()->pTable->lookup(va, entry);
+ return context()->getProcessPtr()->pTable->lookup(va) != nullptr;
}
}
diff --git a/src/arch/x86/tlb.cc b/src/arch/x86/tlb.cc
index 0b1df9e21..93369494d 100644
--- a/src/arch/x86/tlb.cc
+++ b/src/arch/x86/tlb.cc
@@ -94,7 +94,7 @@ TLB::evictLRU()
}
TlbEntry *
-TLB::insert(Addr vpn, TlbEntry &entry)
+TLB::insert(Addr vpn, const TlbEntry &entry)
{
// If somebody beat us to it, just use that existing entry.
TlbEntry *newEntry = trie.lookup(vpn);
@@ -357,23 +357,22 @@ TLB::translate(RequestPtr req, ThreadContext *tc, Translation *translation,
assert(entry);
} else {
Process *p = tc->getProcessPtr();
- TlbEntry newEntry;
- bool success = p->pTable->lookup(vaddr, newEntry);
- if (!success && mode != Execute) {
+ TlbEntry *newEntry = p->pTable->lookup(vaddr);
+ if (!newEntry && mode != Execute) {
// Check if we just need to grow the stack.
if (p->fixupStackFault(vaddr)) {
// If we did, lookup the entry for the new page.
- success = p->pTable->lookup(vaddr, newEntry);
+ newEntry = p->pTable->lookup(vaddr);
}
}
- if (!success) {
+ if (!newEntry) {
return std::make_shared<PageFault>(vaddr, true, mode,
true, false);
} else {
Addr alignedVaddr = p->pTable->pageAlign(vaddr);
DPRINTF(TLB, "Mapping %#x to %#x\n", alignedVaddr,
- newEntry.pageStart());
- entry = insert(alignedVaddr, newEntry);
+ newEntry->pageStart());
+ entry = insert(alignedVaddr, *newEntry);
}
DPRINTF(TLB, "Miss was serviced.\n");
}
diff --git a/src/arch/x86/tlb.hh b/src/arch/x86/tlb.hh
index c3dc83bb2..08804a455 100644
--- a/src/arch/x86/tlb.hh
+++ b/src/arch/x86/tlb.hh
@@ -144,7 +144,7 @@ namespace X86ISA
Fault finalizePhysical(RequestPtr req, ThreadContext *tc,
Mode mode) const override;
- TlbEntry * insert(Addr vpn, TlbEntry &entry);
+ TlbEntry *insert(Addr vpn, const TlbEntry &entry);
/*
* Function to register Stats
diff --git a/src/gpu-compute/gpu_tlb.cc b/src/gpu-compute/gpu_tlb.cc
index b5411f82c..9cbf3e8fa 100644
--- a/src/gpu-compute/gpu_tlb.cc
+++ b/src/gpu-compute/gpu_tlb.cc
@@ -808,31 +808,31 @@ namespace X86ISA
"at pc %#x.\n", vaddr, tc->instAddr());
Process *p = tc->getProcessPtr();
- GpuTlbEntry newEntry;
- bool success = p->pTable->lookup(vaddr, newEntry);
+ TlbEntry *newEntry = p->pTable->lookup(vaddr);
- if (!success && mode != BaseTLB::Execute) {
+ if (!newEntry && mode != BaseTLB::Execute) {
// penalize a "page fault" more
- if (timing) {
+ if (timing)
latency += missLatency2;
- }
if (p->fixupStackFault(vaddr))
- success = p->pTable->lookup(vaddr, newEntry);
+ newEntry = p->pTable->lookup(vaddr);
}
- if (!success) {
+ if (!newEntry) {
return std::make_shared<PageFault>(vaddr, true,
mode, true,
false);
} else {
- newEntry.valid = success;
Addr alignedVaddr = p->pTable->pageAlign(vaddr);
DPRINTF(GPUTLB, "Mapping %#x to %#x\n",
- alignedVaddr, newEntry.pageStart());
+ alignedVaddr, newEntry->pageStart());
- entry = insert(alignedVaddr, newEntry);
+ GpuTlbEntry gpuEntry;
+ *(TlbEntry *)&gpuEntry = *newEntry;
+ gpuEntry.valid = true;
+ entry = insert(alignedVaddr, gpuEntry);
}
DPRINTF(GPUTLB, "Miss was serviced.\n");
@@ -1330,25 +1330,27 @@ namespace X86ISA
safe_cast<TranslationState*>(pkt->senderState);
Process *p = sender_state->tc->getProcessPtr();
- TlbEntry newEntry;
Addr vaddr = pkt->req->getVaddr();
#ifndef NDEBUG
Addr alignedVaddr = p->pTable->pageAlign(vaddr);
assert(alignedVaddr == virtPageAddr);
#endif
- bool success;
- success = p->pTable->lookup(vaddr, newEntry);
- if (!success && sender_state->tlbMode != BaseTLB::Execute) {
- if (p->fixupStackFault(vaddr)) {
- success = p->pTable->lookup(vaddr, newEntry);
- }
+ TlbEntry *newEntry = p->pTable->lookup(vaddr);
+ if (!newEntry && sender_state->tlbMode != BaseTLB::Execute &&
+ p->fixupStackFault(vaddr)) {
+ newEntry = p->pTable->lookup(vaddr);
}
- DPRINTF(GPUTLB, "Mapping %#x to %#x\n", alignedVaddr,
- newEntry.pageStart());
+ if (newEntry) {
+ DPRINTF(GPUTLB, "Mapping %#x to %#x\n", alignedVaddr,
+ newEntry->pageStart());
- sender_state->tlbEntry =
- new GpuTlbEntry(0, newEntry.vaddr, newEntry.paddr, success);
+ sender_state->tlbEntry =
+ new GpuTlbEntry(0, newEntry->vaddr, newEntry->paddr, true);
+ } else {
+ sender_state->tlbEntry =
+ new GpuTlbEntry(0, 0, 0, false);
+ }
handleTranslationReturn(virtPageAddr, TLB_MISS, pkt);
} else if (outcome == MISS_RETURN) {
@@ -1524,7 +1526,6 @@ namespace X86ISA
virt_page_addr);
Process *p = tc->getProcessPtr();
- TlbEntry newEntry;
Addr vaddr = pkt->req->getVaddr();
#ifndef NDEBUG
@@ -1532,10 +1533,10 @@ namespace X86ISA
assert(alignedVaddr == virt_page_addr);
#endif
- bool success = p->pTable->lookup(vaddr, newEntry);
- if (!success && sender_state->tlbMode != BaseTLB::Execute) {
- if (p->fixupStackFault(vaddr))
- success = p->pTable->lookup(vaddr, newEntry);
+ TlbEntry *newEntry = p->pTable->lookup(vaddr);
+ if (!newEntry && sender_state->tlbMode != BaseTLB::Execute &&
+ p->fixupStackFault(vaddr)) {
+ newEntry = p->pTable->lookup(vaddr);
}
if (!sender_state->prefetch) {
@@ -1544,24 +1545,23 @@ namespace X86ISA
assert(success);
DPRINTF(GPUTLB, "Mapping %#x to %#x\n", alignedVaddr,
- newEntry.pageStart());
+ newEntry->pageStart());
- sender_state->tlbEntry = new GpuTlbEntry(0, newEntry.vaddr,
- newEntry.paddr,
- success);
+ sender_state->tlbEntry =
+ new GpuTlbEntry(0, newEntry->vaddr,
+ newEntry->paddr, success);
} else {
// If this was a prefetch, then do the normal thing if it
// was a successful translation. Otherwise, send an empty
// TLB entry back so that it can be figured out as empty and
// handled accordingly.
- if (success) {
+ if (newEntry) {
DPRINTF(GPUTLB, "Mapping %#x to %#x\n", alignedVaddr,
- newEntry.pageStart());
+ newEntry->pageStart());
- sender_state->tlbEntry = new GpuTlbEntry(0,
- newEntry.vaddr,
- newEntry.paddr,
- success);
+ sender_state->tlbEntry =
+ new GpuTlbEntry(0, newEntry->vaddr,
+ newEntry->paddr, success);
} else {
DPRINTF(GPUPrefetch, "Prefetch failed %#x\n",
alignedVaddr);
diff --git a/src/mem/page_table.cc b/src/mem/page_table.cc
index 3854a8ccd..26cc6e537 100644
--- a/src/mem/page_table.cc
+++ b/src/mem/page_table.cc
@@ -146,29 +146,25 @@ EmulationPageTable::isUnmapped(Addr vaddr, int64_t size)
return true;
}
-bool
-EmulationPageTable::lookup(Addr vaddr, TheISA::TlbEntry &entry)
+TheISA::TlbEntry *
+EmulationPageTable::lookup(Addr vaddr)
{
Addr page_addr = pageAlign(vaddr);
-
PTableItr iter = pTable.find(page_addr);
-
if (iter == pTable.end())
- return false;
-
- entry = *iter->second;
- return true;
+ return nullptr;
+ return iter->second;
}
bool
EmulationPageTable::translate(Addr vaddr, Addr &paddr)
{
- TheISA::TlbEntry entry;
- if (!lookup(vaddr, entry)) {
+ TheISA::TlbEntry *entry = lookup(vaddr);
+ if (!entry) {
DPRINTF(MMU, "Couldn't Translate: %#x\n", vaddr);
return false;
}
- paddr = pageOffset(vaddr) + entry.pageStart();
+ paddr = pageOffset(vaddr) + entry->pageStart();
DPRINTF(MMU, "Translating: %#x->%#x\n", vaddr, paddr);
return true;
}
diff --git a/src/mem/page_table.hh b/src/mem/page_table.hh
index 30437a6f9..470a3e7d6 100644
--- a/src/mem/page_table.hh
+++ b/src/mem/page_table.hh
@@ -121,9 +121,9 @@ class EmulationPageTable : public Serializable
/**
* Lookup function
* @param vaddr The virtual address.
- * @return entry The page table entry corresponding to vaddr.
+ * @return The page table entry corresponding to vaddr.
*/
- virtual bool lookup(Addr vaddr, TheISA::TlbEntry &entry);
+ virtual TheISA::TlbEntry *lookup(Addr vaddr);
/**
* Translate function
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-01 00:01:26 +0000