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/*
* Copyright (c) 2011,2013 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Copyright (c) 2006 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.
*/
/**
* @file
* Port object definitions.
*/
#include "mem/translating_port_proxy.hh"
#include "arch/generic/mmu.hh"
#include "base/chunk_generator.hh"
#include "cpu/base.hh"
#include "cpu/thread_context.hh"
#include "sim/system.hh"
namespace gem5
{
TranslatingPortProxy::TranslatingPortProxy(
ThreadContext *tc, Request::Flags _flags) :
PortProxy(tc, tc->getSystemPtr()->cacheLineSize()), _tc(tc), flags(_flags)
{}
bool
TranslatingPortProxy::tryOnBlob(BaseMMU::Mode mode, TranslationGenPtr gen,
std::function<void(const TranslationGen::Range &)> func) const
{
// Wether we're trying to get past a fault.
bool faulting = false;
for (const auto &range: *gen) {
// Was there a fault this time?
if (range.fault) {
// If there was a fault last time too, or the fixup this time
// fails, then the operation has failed.
if (faulting || !fixupRange(range, mode))
return false;
// This must be the first time we've tried this translation, so
// record that we're making a second attempt and continue.
faulting = true;
continue;
}
// Run func() on this successful translation.
faulting = false;
func(range);
}
return true;
}
bool
TranslatingPortProxy::tryReadBlob(Addr addr, void *p, int size) const
{
constexpr auto mode = BaseMMU::Read;
return tryOnBlob(mode, _tc->getMMUPtr()->translateFunctional(
addr, size, _tc, mode, flags),
[this, &p](const auto &range) {
PortProxy::readBlobPhys(range.paddr, flags, p, range.size);
p = static_cast<uint8_t *>(p) + range.size;
});
}
bool
TranslatingPortProxy::tryWriteBlob(
Addr addr, const void *p, int size) const
{
constexpr auto mode = BaseMMU::Write;
return tryOnBlob(mode, _tc->getMMUPtr()->translateFunctional(
addr, size, _tc, mode, flags),
[this, &p](const auto &range) {
PortProxy::writeBlobPhys(range.paddr, flags, p, range.size);
p = static_cast<const uint8_t *>(p) + range.size;
});
}
bool
TranslatingPortProxy::tryMemsetBlob(Addr addr, uint8_t v, int size) const
{
constexpr auto mode = BaseMMU::Write;
return tryOnBlob(mode, _tc->getMMUPtr()->translateFunctional(
addr, size, _tc, mode, flags),
[this, v](const auto &range) {
PortProxy::memsetBlobPhys(range.paddr, flags, v, range.size);
});
}
} // namespace gem5