/*
+ * Copyright (c) 2014 Advanced Micro Devices, Inc.
* Copyright (c) 2003 The Regents of The University of Michigan
* All rights reserved.
*
/**
* @file
- * Definitions of page table.
+ * Definitions of functional page table.
*/
-#include <string>
-#include <map>
#include <fstream>
+#include <map>
+#include <string>
-#include "arch/faults.hh"
#include "base/bitfield.hh"
#include "base/intmath.hh"
#include "base/trace.hh"
+#include "config/the_isa.hh"
+#include "debug/MMU.hh"
#include "mem/page_table.hh"
-#include "sim/process.hh"
+#include "sim/faults.hh"
#include "sim/sim_object.hh"
-#include "sim/system.hh"
using namespace std;
using namespace TheISA;
-PageTable::PageTable(Process *_process, Addr _pageSize)
- : pageSize(_pageSize), offsetMask(mask(floorLog2(_pageSize))),
- process(_process)
+FuncPageTable::FuncPageTable(const std::string &__name, uint64_t _pid, Addr _pageSize)
+ : PageTableBase(__name, _pid, _pageSize)
{
- assert(isPowerOf2(pageSize));
- pTableCache[0].vaddr = 0;
- pTableCache[1].vaddr = 0;
- pTableCache[2].vaddr = 0;
}
-PageTable::~PageTable()
+FuncPageTable::~FuncPageTable()
{
}
void
-PageTable::allocate(Addr vaddr, int64_t size)
+FuncPageTable::map(Addr vaddr, Addr paddr, int64_t size, bool clobber)
{
// starting address must be page aligned
assert(pageOffset(vaddr) == 0);
DPRINTF(MMU, "Allocating Page: %#x-%#x\n", vaddr, vaddr+ size);
- for (; size > 0; size -= pageSize, vaddr += pageSize) {
- PTableItr iter = pTable.find(vaddr);
-
- if (iter != pTable.end()) {
+ for (; size > 0; size -= pageSize, vaddr += pageSize, paddr += pageSize) {
+ if (!clobber && (pTable.find(vaddr) != pTable.end())) {
// already mapped
- fatal("PageTable::allocate: address 0x%x already mapped",
- vaddr);
+ fatal("FuncPageTable::allocate: address 0x%x already mapped", vaddr);
}
- pTable[vaddr] = TheISA::TlbEntry(process->M5_pid, vaddr,
- process->system->new_page());
+ pTable[vaddr] = TheISA::TlbEntry(pid, vaddr, paddr);
+ eraseCacheEntry(vaddr);
updateCache(vaddr, pTable[vaddr]);
}
}
void
-PageTable::remap(Addr vaddr, int64_t size, Addr new_vaddr)
+FuncPageTable::remap(Addr vaddr, int64_t size, Addr new_vaddr)
{
assert(pageOffset(vaddr) == 0);
assert(pageOffset(new_vaddr) == 0);
new_vaddr, size);
for (; size > 0; size -= pageSize, vaddr += pageSize, new_vaddr += pageSize) {
- PTableItr iter = pTable.find(vaddr);
-
- assert(iter != pTable.end());
+ assert(pTable.find(vaddr) != pTable.end());
pTable[new_vaddr] = pTable[vaddr];
pTable.erase(vaddr);
+ eraseCacheEntry(vaddr);
pTable[new_vaddr].updateVaddr(new_vaddr);
updateCache(new_vaddr, pTable[new_vaddr]);
}
}
void
-PageTable::deallocate(Addr vaddr, int64_t size)
+FuncPageTable::unmap(Addr vaddr, int64_t size)
{
assert(pageOffset(vaddr) == 0);
- DPRINTF(MMU, "Deallocating page: %#x-%#x\n", vaddr, vaddr+ size);
+ DPRINTF(MMU, "Unmapping page: %#x-%#x\n", vaddr, vaddr+ size);
for (; size > 0; size -= pageSize, vaddr += pageSize) {
- PTableItr iter = pTable.find(vaddr);
+ assert(pTable.find(vaddr) != pTable.end());
+ pTable.erase(vaddr);
+ eraseCacheEntry(vaddr);
+ }
- assert(iter != pTable.end());
+}
- pTable.erase(vaddr);
+bool
+FuncPageTable::isUnmapped(Addr vaddr, int64_t size)
+{
+ // starting address must be page aligned
+ assert(pageOffset(vaddr) == 0);
+
+ for (; size > 0; size -= pageSize, vaddr += pageSize) {
+ if (pTable.find(vaddr) != pTable.end()) {
+ return false;
+ }
}
+ return true;
}
bool
-PageTable::lookup(Addr vaddr, TheISA::TlbEntry &entry)
+FuncPageTable::lookup(Addr vaddr, TheISA::TlbEntry &entry)
{
Addr page_addr = pageAlign(vaddr);
- if (pTableCache[0].vaddr == page_addr) {
+ if (pTableCache[0].valid && pTableCache[0].vaddr == page_addr) {
entry = pTableCache[0].entry;
return true;
}
- if (pTableCache[1].vaddr == page_addr) {
+ if (pTableCache[1].valid && pTableCache[1].vaddr == page_addr) {
entry = pTableCache[1].entry;
return true;
}
- if (pTableCache[2].vaddr == page_addr) {
+ if (pTableCache[2].valid && pTableCache[2].vaddr == page_addr) {
entry = pTableCache[2].entry;
return true;
}
}
bool
-PageTable::translate(Addr vaddr, Addr &paddr)
+PageTableBase::translate(Addr vaddr, Addr &paddr)
{
TheISA::TlbEntry entry;
if (!lookup(vaddr, entry)) {
}
Fault
-PageTable::translate(RequestPtr req)
+PageTableBase::translate(RequestPtr req)
{
Addr paddr;
assert(pageAlign(req->getVaddr() + req->getSize() - 1)
}
void
-PageTable::serialize(std::ostream &os)
+FuncPageTable::serialize(std::ostream &os)
{
paramOut(os, "ptable.size", pTable.size());
PTableItr iter = pTable.begin();
PTableItr end = pTable.end();
while (iter != end) {
- os << "\n[" << csprintf("%s.Entry%d", process->name(), count) << "]\n";
+ os << "\n[" << csprintf("%s.Entry%d", name(), count) << "]\n";
paramOut(os, "vaddr", iter->first);
iter->second.serialize(os);
}
void
-PageTable::unserialize(Checkpoint *cp, const std::string §ion)
+FuncPageTable::unserialize(Checkpoint *cp, const std::string §ion)
{
int i = 0, count;
paramIn(cp, section, "ptable.size", count);
- Addr vaddr;
- TheISA::TlbEntry *entry;
pTable.clear();
- while(i < count) {
- paramIn(cp, csprintf("%s.Entry%d", process->name(), i), "vaddr", vaddr);
+ while (i < count) {
+ TheISA::TlbEntry *entry;
+ Addr vaddr;
+
+ paramIn(cp, csprintf("%s.Entry%d", name(), i), "vaddr", vaddr);
entry = new TheISA::TlbEntry();
- entry->unserialize(cp, csprintf("%s.Entry%d", process->name(), i));
+ entry->unserialize(cp, csprintf("%s.Entry%d", name(), i));
pTable[vaddr] = *entry;
+ delete entry;
++i;
- }
+ }
}
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