translating_port_proxy.cc

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#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