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/*
* Copyright (c) 2011 Google
* Copyright (c) 2015 Advanced Micro Devices, Inc.
* 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.
*
* Authors: Gabe Black
*/
#ifndef __ARCH_X86_MEMHELPERS_HH__
#define __ARCH_X86_MEMHELPERS_HH__
#include <array>
#include "base/types.hh"
#include "sim/byteswap.hh"
#include "sim/insttracer.hh"
namespace X86ISA
{
/// Initiate a read from memory in timing mode.
template <class XC>
Fault
initiateMemRead(XC *xc, Trace::InstRecord *traceData, Addr addr,
unsigned dataSize, Request::Flags flags)
{
return xc->initiateMemRead(addr, dataSize, flags);
}
static void
getMem(PacketPtr pkt, uint64_t &mem, unsigned dataSize,
Trace::InstRecord *traceData)
{
switch (dataSize) {
case 1:
mem = pkt->get<uint8_t>();
break;
case 2:
mem = pkt->get<uint16_t>();
break;
case 4:
mem = pkt->get<uint32_t>();
break;
case 8:
mem = pkt->get<uint64_t>();
break;
default:
panic("Unhandled size in getMem.\n");
}
if (traceData)
traceData->setData(mem);
}
template <size_t N>
void
getMem(PacketPtr pkt, std::array<uint64_t, N> &mem, unsigned dataSize,
Trace::InstRecord *traceData)
{
assert(dataSize >= 8);
assert((dataSize % 8) == 0);
int num_words = dataSize / 8;
assert(num_words <= N);
auto pkt_data = pkt->getConstPtr<const uint64_t>();
for (int i = 0; i < num_words; ++i)
mem[i] = gtoh(pkt_data[i]);
// traceData record only has space for 64 bits, so we just record
// the first qword
if (traceData)
traceData->setData(mem[0]);
}
template <class XC>
Fault
readMemAtomic(XC *xc, Trace::InstRecord *traceData, Addr addr, uint64_t &mem,
unsigned dataSize, Request::Flags flags)
{
memset(&mem, 0, sizeof(mem));
Fault fault = xc->readMem(addr, (uint8_t *)&mem, dataSize, flags);
if (fault == NoFault) {
// If LE to LE, this is a nop, if LE to BE, the actual data ends up
// in the right place because the LSBs where at the low addresses on
// access. This doesn't work for BE guests.
mem = gtoh(mem);
if (traceData)
traceData->setData(mem);
}
return fault;
}
template <class XC, size_t N>
Fault
readMemAtomic(XC *xc, Trace::InstRecord *traceData, Addr addr,
std::array<uint64_t, N> &mem, unsigned dataSize,
unsigned flags)
{
assert(dataSize >= 8);
assert((dataSize % 8) == 0);
Fault fault = xc->readMem(addr, (uint8_t *)&mem, dataSize, flags);
if (fault == NoFault) {
int num_words = dataSize / 8;
assert(num_words <= N);
for (int i = 0; i < num_words; ++i)
mem[i] = gtoh(mem[i]);
if (traceData)
traceData->setData(mem[0]);
}
return fault;
}
template <class XC>
Fault
writeMemTiming(XC *xc, Trace::InstRecord *traceData, uint64_t mem,
unsigned dataSize, Addr addr, Request::Flags flags,
uint64_t *res)
{
if (traceData) {
traceData->setData(mem);
}
mem = TheISA::htog(mem);
return xc->writeMem((uint8_t *)&mem, dataSize, addr, flags, res);
}
template <class XC, size_t N>
Fault
writeMemTiming(XC *xc, Trace::InstRecord *traceData,
std::array<uint64_t, N> &mem, unsigned dataSize,
Addr addr, unsigned flags, uint64_t *res)
{
assert(dataSize >= 8);
assert((dataSize % 8) == 0);
if (traceData) {
traceData->setData(mem[0]);
}
int num_words = dataSize / 8;
assert(num_words <= N);
for (int i = 0; i < num_words; ++i)
mem[i] = htog(mem[i]);
return xc->writeMem((uint8_t *)&mem, dataSize, addr, flags, res);
}
template <class XC>
Fault
writeMemAtomic(XC *xc, Trace::InstRecord *traceData, uint64_t mem,
unsigned dataSize, Addr addr, Request::Flags flags,
uint64_t *res)
{
if (traceData) {
traceData->setData(mem);
}
uint64_t host_mem = TheISA::htog(mem);
Fault fault =
xc->writeMem((uint8_t *)&host_mem, dataSize, addr, flags, res);
if (fault == NoFault && res != NULL) {
*res = gtoh(*res);
}
return fault;
}
template <class XC, size_t N>
Fault
writeMemAtomic(XC *xc, Trace::InstRecord *traceData,
std::array<uint64_t, N> &mem, unsigned dataSize,
Addr addr, unsigned flags, uint64_t *res)
{
if (traceData) {
traceData->setData(mem[0]);
}
int num_words = dataSize / 8;
assert(num_words <= N);
for (int i = 0; i < num_words; ++i)
mem[i] = htog(mem[i]);
Fault fault = xc->writeMem((uint8_t *)&mem, dataSize, addr, flags, res);
if (fault == NoFault && res != NULL) {
*res = gtoh(*res);
}
return fault;
}
}
#endif
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