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/*
* Copyright (c) 2001-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <string>
#include "arch/faults.hh"
#include "base/chunk_generator.hh"
#include "mem/port.hh"
#include "mem/translating_port.hh"
#include "mem/page_table.hh"
using namespace TheISA;
TranslatingPort::TranslatingPort(Port *_port, PageTable *p_table)
: port(_port), pTable(p_table)
{ }
TranslatingPort::~TranslatingPort()
{ }
Fault
TranslatingPort::readBlobFunctional(Addr addr, uint8_t *p, int size)
{
Addr paddr;
int prevSize = 0;
for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) {
if (!pTable->translate(gen.addr(),paddr))
return genMachineCheckFault();
port->readBlobFunctional(paddr, p + prevSize, gen.size());
prevSize += gen.size();
}
return NoFault;
}
Fault
TranslatingPort::writeBlobFunctional(Addr addr, uint8_t *p, int size,
bool alloc)
{
Addr paddr;
int prevSize = 0;
for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) {
if (!pTable->translate(gen.addr(), paddr)) {
if (alloc) {
pTable->allocate(roundDown(gen.addr(), VMPageSize),
VMPageSize);
pTable->translate(gen.addr(), paddr);
} else {
return genMachineCheckFault();
}
}
port->writeBlobFunctional(paddr, p + prevSize, gen.size());
prevSize += gen.size();
}
return NoFault;
}
Fault
TranslatingPort::memsetBlobFunctional(Addr addr, uint8_t val, int size,
bool alloc)
{
Addr paddr;
for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) {
if (!pTable->translate(gen.addr(), paddr)) {
if (alloc) {
pTable->allocate(roundDown(gen.addr(), VMPageSize),
VMPageSize);
pTable->translate(gen.addr(), paddr);
} else {
return genMachineCheckFault();
}
}
port->memsetBlobFunctional(paddr, val, gen.size());
}
return NoFault;
}
Fault
TranslatingPort::writeStringFunctional(Addr addr, const char *str)
{
Addr paddr,vaddr;
uint8_t c;
vaddr = addr;
do {
c = *str++;
if (!pTable->translate(vaddr++,paddr))
return genMachineCheckFault();
port->writeBlobFunctional(paddr, &c, 1);
} while (c);
return NoFault;
}
Fault
TranslatingPort::readStringFunctional(std::string &str, Addr addr)
{
Addr paddr,vaddr;
uint8_t c;
vaddr = addr;
do {
if (!pTable->translate(vaddr++,paddr))
return genMachineCheckFault();
port->readBlobFunctional(paddr, &c, 1);
str += c;
} while (c);
return NoFault;
}
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