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187 lines
5.2 KiB
C++
187 lines
5.2 KiB
C++
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// Copyright 2019 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include "common/assert.h"
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#include "core/core.h"
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#include "core/core_timing_util.h"
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#include "core/memory.h"
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#include "core/memory/freezer.h"
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namespace Memory {
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constexpr s64 MEMORY_FREEZER_TICKS = static_cast<s64>(Core::Timing::BASE_CLOCK_RATE / 60);
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namespace {
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u64 MemoryReadWidth(u8 width, VAddr addr) {
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switch (width) {
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case 1:
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return Read8(addr);
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case 2:
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return Read16(addr);
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case 4:
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return Read32(addr);
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case 8:
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return Read64(addr);
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default:
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UNREACHABLE();
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return 0;
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}
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}
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void MemoryWriteWidth(u8 width, VAddr addr, u64 value) {
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switch (width) {
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case 1:
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Write8(addr, static_cast<u8>(value));
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break;
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case 2:
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Write16(addr, static_cast<u16>(value));
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break;
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case 4:
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Write32(addr, static_cast<u32>(value));
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break;
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case 8:
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Write64(addr, value);
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break;
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default:
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UNREACHABLE();
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}
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}
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} // Anonymous namespace
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Freezer::Freezer(Core::Timing::CoreTiming& core_timing) : core_timing(core_timing) {
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event = core_timing.RegisterEvent(
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"MemoryFreezer::FrameCallback",
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[this](u64 userdata, s64 cycles_late) { FrameCallback(userdata, cycles_late); });
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core_timing.ScheduleEvent(MEMORY_FREEZER_TICKS, event);
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}
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Freezer::~Freezer() {
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core_timing.UnscheduleEvent(event, 0);
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}
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void Freezer::SetActive(bool active) {
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if (!this->active.exchange(active)) {
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FillEntryReads();
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core_timing.ScheduleEvent(MEMORY_FREEZER_TICKS, event);
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LOG_DEBUG(Common_Memory, "Memory freezer activated!");
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} else {
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LOG_DEBUG(Common_Memory, "Memory freezer deactivated!");
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}
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}
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bool Freezer::IsActive() const {
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return active.load();
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}
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void Freezer::Clear() {
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std::lock_guard<std::recursive_mutex> lock(entries_mutex);
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LOG_DEBUG(Common_Memory, "Clearing all frozen memory values.");
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entries.clear();
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}
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u64 Freezer::Freeze(VAddr address, u8 width) {
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std::lock_guard<std::recursive_mutex> lock(entries_mutex);
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const auto current_value = MemoryReadWidth(width, address);
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entries.push_back({address, width, current_value});
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LOG_DEBUG(Common_Memory,
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"Freezing memory for address={:016X}, width={:02X}, current_value={:016X}", address,
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width, current_value);
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return current_value;
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}
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void Freezer::Unfreeze(VAddr address) {
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std::lock_guard<std::recursive_mutex> lock(entries_mutex);
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LOG_DEBUG(Common_Memory, "Unfreezing memory for address={:016X}", address);
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entries.erase(
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std::remove_if(entries.begin(), entries.end(),
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[&address](const Entry& entry) { return entry.address == address; }),
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entries.end());
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}
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bool Freezer::IsFrozen(VAddr address) {
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std::lock_guard<std::recursive_mutex> lock(entries_mutex);
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return std::find_if(entries.begin(), entries.end(), [&address](const Entry& entry) {
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return entry.address == address;
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}) != entries.end();
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}
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void Freezer::SetFrozenValue(VAddr address, u64 value) {
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std::lock_guard<std::recursive_mutex> lock(entries_mutex);
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const auto iter = std::find_if(entries.begin(), entries.end(), [&address](const Entry& entry) {
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return entry.address == address;
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});
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if (iter == entries.end()) {
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LOG_ERROR(Common_Memory,
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"Tried to set freeze value for address={:016X} that is not frozen!", address);
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return;
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}
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LOG_DEBUG(Common_Memory,
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"Manually overridden freeze value for address={:016X}, width={:02X} to value={:016X}",
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iter->address, iter->width, value);
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iter->value = value;
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}
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std::optional<Freezer::Entry> Freezer::GetEntry(VAddr address) {
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std::lock_guard<std::recursive_mutex> lock(entries_mutex);
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const auto iter = std::find_if(entries.begin(), entries.end(), [&address](const Entry& entry) {
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return entry.address == address;
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});
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if (iter == entries.end()) {
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return std::nullopt;
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}
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return *iter;
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}
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std::vector<Freezer::Entry> Freezer::GetEntries() {
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std::lock_guard<std::recursive_mutex> lock(entries_mutex);
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return entries;
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}
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void Freezer::FrameCallback(u64 userdata, s64 cycles_late) {
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if (!active.load()) {
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LOG_DEBUG(Common_Memory, "Memory freezer has been deactivated, ending callback events.");
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return;
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}
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std::lock_guard<std::recursive_mutex> lock(entries_mutex);
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for (const auto& entry : entries) {
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LOG_DEBUG(Common_Memory,
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"Enforcing memory freeze at address={:016X}, value={:016X}, width={:02X}",
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entry.address, entry.value, entry.width);
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MemoryWriteWidth(entry.width, entry.address, entry.value);
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}
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core_timing.ScheduleEvent(MEMORY_FREEZER_TICKS - cycles_late, event);
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}
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void Freezer::FillEntryReads() {
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std::lock_guard<std::recursive_mutex> lock(entries_mutex);
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LOG_DEBUG(Common_Memory, "Updating memory freeze entries to current values.");
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for (auto& entry : entries) {
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entry.value = MemoryReadWidth(entry.width, entry.address);
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}
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}
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} // namespace Memory
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