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https://github.com/Retropex/dolphin.git
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ffcf107dd2
Gets rid of the need to construct UReg_MSR values around the the actual member in order to query information from it (without using shifts and masks). This makes it more concise in some areas, while helping with readability in some other places (such as copying the ILE bit to the LE bit in the exception checking functions).
87 lines
2.4 KiB
C++
87 lines
2.4 KiB
C++
// Copyright 2017 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include "Core/IOS/MIOS.h"
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#include <cstring>
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#include <utility>
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#include "Common/CommonTypes.h"
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#include "Common/FileUtil.h"
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#include "Common/Logging/Log.h"
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#include "Common/MsgHandler.h"
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#include "Common/Swap.h"
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#include "Core/ConfigManager.h"
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#include "Core/Core.h"
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#include "Core/DSPEmulator.h"
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#include "Core/HLE/HLE.h"
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#include "Core/HW/DSP.h"
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#include "Core/HW/DVD/DVDInterface.h"
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#include "Core/HW/Memmap.h"
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#include "Core/HW/SystemTimers.h"
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#include "Core/PowerPC/PPCSymbolDB.h"
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#include "Core/PowerPC/PowerPC.h"
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namespace IOS
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{
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namespace HLE
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{
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namespace MIOS
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{
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static void ReinitHardware()
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{
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SConfig::GetInstance().bWii = false;
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// IOS clears mem2 and overwrites it with pseudo-random data (for security).
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std::memset(Memory::m_pEXRAM, 0, Memory::EXRAM_SIZE);
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// MIOS appears to only reset the DI and the PPC.
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DVDInterface::Reset();
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PowerPC::Reset();
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// Note: this is specific to Dolphin and is required because we initialised it in Wii mode.
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DSP::Reinit(SConfig::GetInstance().bDSPHLE);
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DSP::GetDSPEmulator()->Initialize(SConfig::GetInstance().bWii, SConfig::GetInstance().bDSPThread);
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SystemTimers::ChangePPCClock(SystemTimers::Mode::GC);
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}
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constexpr u32 ADDRESS_INIT_SEMAPHORE = 0x30f8;
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bool Load()
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{
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Memory::Write_U32(0x00000000, ADDRESS_INIT_SEMAPHORE);
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Memory::Write_U32(0x09142001, 0x3180);
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ReinitHardware();
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NOTICE_LOG(IOS, "Reinitialised hardware.");
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// Load symbols for the IPL if they exist.
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g_symbolDB.Clear();
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if (g_symbolDB.LoadMap(File::GetUserPath(D_MAPS_IDX) + "mios-ipl.map"))
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{
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::HLE::Clear();
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::HLE::PatchFunctions();
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}
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const PowerPC::CoreMode core_mode = PowerPC::GetMode();
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PowerPC::SetMode(PowerPC::CoreMode::Interpreter);
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MSR.Hex = 0;
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PC = 0x3400;
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NOTICE_LOG(IOS, "Loaded MIOS and bootstrapped PPC.");
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// IOS writes 0 to 0x30f8 before bootstrapping the PPC. Once started, the IPL eventually writes
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// 0xdeadbeef there, then waits for it to be cleared by IOS before continuing.
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while (Memory::Read_U32(ADDRESS_INIT_SEMAPHORE) != 0xdeadbeef)
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PowerPC::SingleStep();
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PowerPC::SetMode(core_mode);
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Memory::Write_U32(0x00000000, ADDRESS_INIT_SEMAPHORE);
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NOTICE_LOG(IOS, "IPL ready.");
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SConfig::GetInstance().m_is_mios = true;
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DVDInterface::UpdateRunningGameMetadata();
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return true;
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}
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} // namespace MIOS
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} // namespace HLE
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} // namespace IOS
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