sanchayanmaity/gem5
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

X86: Add a trace flag for the page table walker.

Browse source
This commit is contained in:
Gabe Black 2009-02-25 10:17:27 -08:00
parent 99aa121fca
commit e4ede69b2f
2 changed files with 23 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
src/arch/x86/SConscript
View file

@ -111,6 +111,8 @@ if env['TARGET_ISA'] == 'x86':
if env['FULL_SYSTEM']:
TraceFlag('LocalApic', "Local APIC debugging")
TraceFlag('PageTableWalker', \
"Page table walker state machine debugging")
SimObject('X86LocalApic.py')
SimObject('X86System.py')

21
src/arch/x86/pagetable_walker.cc
View file

@ -101,6 +101,8 @@ Walker::doNext(PacketPtr &write)
bool badNX = pte.nx && (!tlb->allowNX() || !enableNX);
switch(state) {
case LongPML4:
DPRINTF(PageTableWalker,
"Got long mode PML4 entry %#016x.\n", (uint64_t)pte);
nextRead = ((uint64_t)pte & (mask(40) << 12)) + vaddr.longl3 * size;
doWrite = !pte.a;
pte.a = 1;
@ -114,6 +116,8 @@ Walker::doNext(PacketPtr &write)
nextState = LongPDP;
break;
case LongPDP:
DPRINTF(PageTableWalker,
"Got long mode PDP entry %#016x.\n", (uint64_t)pte);
nextRead = ((uint64_t)pte & (mask(40) << 12)) + vaddr.longl2 * size;
doWrite = !pte.a;
pte.a = 1;
@ -126,6 +130,8 @@ Walker::doNext(PacketPtr &write)
nextState = LongPD;
break;
case LongPD:
DPRINTF(PageTableWalker,
"Got long mode PD entry %#016x.\n", (uint64_t)pte);
doWrite = !pte.a;
pte.a = 1;
entry.writable = entry.writable && pte.w;
@ -154,6 +160,8 @@ Walker::doNext(PacketPtr &write)
return NoFault;
}
case LongPTE:
DPRINTF(PageTableWalker,
"Got long mode PTE entry %#016x.\n", (uint64_t)pte);
doWrite = !pte.a;
pte.a = 1;
entry.writable = entry.writable && pte.w;
@ -171,6 +179,8 @@ Walker::doNext(PacketPtr &write)
stop();
return NoFault;
case PAEPDP:
DPRINTF(PageTableWalker,
"Got legacy mode PAE PDP entry %#08x.\n", (uint32_t)pte);
nextRead = ((uint64_t)pte & (mask(40) << 12)) + vaddr.pael2 * size;
if (!pte.p) {
stop();
@ -179,6 +189,8 @@ Walker::doNext(PacketPtr &write)
nextState = PAEPD;
break;
case PAEPD:
DPRINTF(PageTableWalker,
"Got legacy mode PAE PD entry %#08x.\n", (uint32_t)pte);
doWrite = !pte.a;
pte.a = 1;
entry.writable = pte.w;
@ -206,6 +218,8 @@ Walker::doNext(PacketPtr &write)
return NoFault;
}
case PAEPTE:
DPRINTF(PageTableWalker,
"Got legacy mode PAE PTE entry %#08x.\n", (uint32_t)pte);
doWrite = !pte.a;
pte.a = 1;
entry.writable = entry.writable && pte.w;
@ -223,6 +237,8 @@ Walker::doNext(PacketPtr &write)
stop();
return NoFault;
case PSEPD:
DPRINTF(PageTableWalker,
"Got legacy mode PSE PD entry %#08x.\n", (uint32_t)pte);
doWrite = !pte.a;
pte.a = 1;
entry.writable = pte.w;
@ -251,6 +267,8 @@ Walker::doNext(PacketPtr &write)
return NoFault;
}
case PD:
DPRINTF(PageTableWalker,
"Got legacy mode PD entry %#08x.\n", (uint32_t)pte);
doWrite = !pte.a;
pte.a = 1;
entry.writable = pte.w;
@ -265,6 +283,8 @@ Walker::doNext(PacketPtr &write)
nextState = PTE;
break;
case PTE:
DPRINTF(PageTableWalker,
"Got legacy mode PTE entry %#08x.\n", (uint32_t)pte);
doWrite = !pte.a;
pte.a = 1;
entry.writable = pte.w;
@ -541,6 +561,7 @@ Walker::getPort(const std::string &if_name, int idx)
Fault
Walker::pageFault(bool present)
{
DPRINTF(PageTableWalker, "Raising page fault.\n");
HandyM5Reg m5reg = tc->readMiscRegNoEffect(MISCREG_M5_REG);
return new PageFault(entry.vaddr, present, write,
m5reg.cpl == 3, false, execute && enableNX);