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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.
*/
#ifndef __ARCH_X86_MEMHELPERS_HH__
#define __ARCH_X86_MEMHELPERS_HH__
#include <array>
#include "base/types.hh"
#include "cpu/exec_context.hh"
#include "sim/byteswap.hh"
#include "sim/insttracer.hh"
namespace X86ISA
{
/// Initiate a read from memory in timing mode.
static Fault
initiateMemRead(ExecContext *xc, Trace::InstRecord *traceData, Addr addr,
unsigned dataSize, Request::Flags flags)
{
const std::vector<bool> byte_enable(dataSize, true);
return xc->initiateMemRead(addr, dataSize, flags, byte_enable);
}
static void
getMem(PacketPtr pkt, uint64_t &mem, unsigned dataSize,
Trace::InstRecord *traceData)
{
switch (dataSize) {
case 1:
mem = pkt->getLE<uint8_t>();
break;
case 2:
mem = pkt->getLE<uint16_t>();
break;
case 4:
mem = pkt->getLE<uint32_t>();
break;
case 8:
mem = pkt->getLE<uint64_t>();
break;
default:
panic("Unhandled size in getMem.\n");
}
if (traceData)
traceData->setData(mem);
}
template <typename T, size_t N>
static void
getPackedMem(PacketPtr pkt, std::array<uint64_t, N> &mem, unsigned dataSize)
{
std::array<T, N> real_mem = pkt->getLE<std::array<T, N> >();
for (int i = 0; i < N; i++)
mem[i] = real_mem[i];
}
template <size_t N>
static void
getMem(PacketPtr pkt, std::array<uint64_t, N> &mem, unsigned dataSize,
Trace::InstRecord *traceData)
{
switch (dataSize) {
case 4:
getPackedMem<uint32_t, N>(pkt, mem, dataSize);
break;
case 8:
getPackedMem<uint64_t, N>(pkt, mem, dataSize);
break;
default:
panic("Unhandled element size in getMem.\n");
}
if (traceData)
traceData->setData(mem[0]);
}
static Fault
readMemAtomic(ExecContext *xc, Trace::InstRecord *traceData, Addr addr,
uint64_t &mem, unsigned dataSize, Request::Flags flags)
{
memset(&mem, 0, sizeof(mem));
const std::vector<bool> byte_enable(dataSize, true);
Fault fault = xc->readMem(addr, (uint8_t *)&mem, dataSize,
flags, byte_enable);
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 = letoh(mem);
if (traceData)
traceData->setData(mem);
}
return fault;
}
template <typename T, size_t N>
static Fault
readPackedMemAtomic(ExecContext *xc, Addr addr, std::array<uint64_t, N> &mem,
unsigned flags)
{
std::array<T, N> real_mem;
// Size is fixed at compilation time. Make a static vector.
constexpr auto size = sizeof(T) * N;
static const std::vector<bool> byte_enable(size, true);
Fault fault = xc->readMem(addr, (uint8_t *)&real_mem,
size, flags, byte_enable);
if (fault == NoFault) {
real_mem = letoh(real_mem);
for (int i = 0; i < N; i++)
mem[i] = real_mem[i];
}
return fault;
}
template <size_t N>
static Fault
readMemAtomic(ExecContext *xc, Trace::InstRecord *traceData, Addr addr,
std::array<uint64_t, N> &mem, unsigned dataSize,
unsigned flags)
{
Fault fault = NoFault;
switch (dataSize) {
case 4:
fault = readPackedMemAtomic<uint32_t, N>(xc, addr, mem, flags);
break;
case 8:
fault = readPackedMemAtomic<uint64_t, N>(xc, addr, mem, flags);
break;
default:
panic("Unhandled element size in readMemAtomic\n");
}
if (fault == NoFault && traceData)
traceData->setData(mem[0]);
return fault;
}
template <typename T, size_t N>
static Fault
writePackedMem(ExecContext *xc, std::array<uint64_t, N> &mem, Addr addr,
unsigned flags, uint64_t *res)
{
std::array<T, N> real_mem;
for (int i = 0; i < N; i++)
real_mem[i] = mem[i];
real_mem = htole(real_mem);
// Size is fixed at compilation time. Make a static vector.
constexpr auto size = sizeof(T) * N;
static const std::vector<bool> byte_enable(size, true);
return xc->writeMem((uint8_t *)&real_mem, size,
addr, flags, res, byte_enable);
}
static Fault
writeMemTiming(ExecContext *xc, Trace::InstRecord *traceData, uint64_t mem,
unsigned dataSize, Addr addr, Request::Flags flags,
uint64_t *res)
{
if (traceData)
traceData->setData(mem);
mem = htole(mem);
const std::vector<bool> byte_enable(dataSize, true);
return xc->writeMem((uint8_t *)&mem, dataSize, addr, flags,
res, byte_enable);
}
template <size_t N>
static Fault
writeMemTiming(ExecContext *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]);
switch (dataSize) {
case 4:
return writePackedMem<uint32_t, N>(xc, mem, addr, flags, res);
case 8:
return writePackedMem<uint64_t, N>(xc, mem, addr, flags, res);
default:
panic("Unhandled element size in writeMemTiming.\n");
}
}
static Fault
writeMemAtomic(ExecContext *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 = htole(mem);
const std::vector<bool> byte_enable(dataSize, true);
Fault fault = xc->writeMem((uint8_t *)&host_mem, dataSize, addr,
flags, res, byte_enable);
if (fault == NoFault && res)
*res = letoh(*res);
return fault;
}
template <size_t N>
static Fault
writeMemAtomic(ExecContext *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]);
Fault fault;
switch (dataSize) {
case 4:
fault = writePackedMem<uint32_t, N>(xc, mem, addr, flags, res);
break;
case 8:
fault = writePackedMem<uint64_t, N>(xc, mem, addr, flags, res);
break;
default:
panic("Unhandled element size in writeMemAtomic.\n");
}
if (fault == NoFault && res)
*res = letoh(*res);
return fault;
}
}
#endif