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fix the translating ports so it can add a page on a fault

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--HG--
extra : convert_revision : 56f6f2cbf4e92b7f2dd8c9453831fab86d83ef80
This commit is contained in:
Ali Saidi
2007-05-09 15:37:46 -04:00
parent a38c79ec22
commit 37b45e3c8c
9 changed files with 134 additions and 49 deletions
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17
src/mem/translating_port.cc
View File

@@ -34,12 +34,14 @@
#include "mem/port.hh"
#include "mem/translating_port.hh"
#include "mem/page_table.hh"
#include "sim/process.hh"
using namespace TheISA;
TranslatingPort::TranslatingPort(const std::string &_name,
PageTable *p_table, bool alloc)
: FunctionalPort(_name), pTable(p_table), allocating(alloc)
Process *p, AllocType alloc)
: FunctionalPort(_name), pTable(p->pTable), process(p),
allocating(alloc)
{ }
TranslatingPort::~TranslatingPort()
@@ -81,13 +83,18 @@ TranslatingPort::tryWriteBlob(Addr addr, uint8_t *p, int size)
for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) {
if (!pTable->translate(gen.addr(), paddr)) {
if (allocating) {
if (allocating == Always) {
pTable->allocate(roundDown(gen.addr(), VMPageSize),
VMPageSize);
pTable->translate(gen.addr(), paddr);
} else if (allocating == NextPage) {
// check if we've accessed the next page on the stack
if (!process->checkAndAllocNextPage(gen.addr()))
panic("Page table fault when accessing virtual address %#x "
"during functional write\n", gen.addr());
} else {
return false;
}
pTable->translate(gen.addr(), paddr);
}
Port::writeBlob(paddr, p + prevSize, gen.size());
@@ -113,7 +120,7 @@ TranslatingPort::tryMemsetBlob(Addr addr, uint8_t val, int size)
for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) {
if (!pTable->translate(gen.addr(), paddr)) {
if (allocating) {
if (allocating == Always) {
pTable->allocate(roundDown(gen.addr(), VMPageSize),
VMPageSize);
pTable->translate(gen.addr(), paddr);

13
src/mem/translating_port.hh
View File

@@ -35,16 +35,25 @@
#include "mem/port.hh"
class PageTable;
class Process;
class TranslatingPort : public FunctionalPort
{
public:
enum AllocType {
Always,
Never,
NextPage
};
private:
PageTable *pTable;
bool allocating;
Process *process;
AllocType allocating;
public:
TranslatingPort(const std::string &_name,
PageTable *p_table, bool alloc = false);
Process *p, AllocType alloc);
virtual ~TranslatingPort();
bool tryReadBlob(Addr addr, uint8_t *p, int size);