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d951f9e765b81772a464bd663926e05c98b00201
dolphin/Source/Core/Core/Boot/Boot.cpp
magumagu d557310371 Support for dynamic BAT modification (dynamic-bat). 
Fundamentally, all this does is enforce the invariant that we always
translate effective addresses based on the current BAT registers and
page table before we do anything else with them.

This change can be logically divided into three parts.  The first part is
creating a table to represent the current BAT state, and keeping it up to
date (PowerPC::IBATUpdated, PowerPC::DBATUpdated, etc.).  This does
nothing by itself, but it's necessary for the other parts.

The second part (mostly in MMU.cpp) is simply removing all the hardcoded
checks for specific untranslated addresses, and consistently translating
addresses using the current BAT configuration. Very straightforward, but a
lot of code changes because we hardcoded assumptions all over the place.

The third part (mostly in Memmap.cpp) is making the fastmem arena reflect
the current BAT configuration.  We do this by redoing the mapping (calling
memmap()) based on the BAT table whenever it changes.

One additional minor change is that translation can fail in two ways:
either the segment is a direct store segment, or page table lookup failed.
The difference doesn't usually matter, but the difference affects cache
instructions, like dcbz.
2016-09-06 08:43:22 +02:00

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// Copyright 2008 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include <vector>
#include <zlib.h>
#include "Common/CommonPaths.h"
#include "Common/CommonTypes.h"
#include "Common/FileUtil.h"
#include "Common/MathUtil.h"
#include "Common/StringUtil.h"
#include "Core/Boot/Boot.h"
#include "Core/Boot/Boot_DOL.h"
#include "Core/ConfigManager.h"
#include "Core/Core.h"
#include "Core/Debugger/Debugger_SymbolMap.h"
#include "Core/HLE/HLE.h"
#include "Core/HW/DVDInterface.h"
#include "Core/HW/EXI_DeviceIPL.h"
#include "Core/HW/Memmap.h"
#include "Core/HW/ProcessorInterface.h"
#include "Core/HW/VideoInterface.h"
#include "Core/Host.h"
#include "Core/IPC_HLE/WII_IPC_HLE.h"
#include "Core/PatchEngine.h"
#include "Core/PowerPC/PPCAnalyst.h"
#include "Core/PowerPC/PPCSymbolDB.h"
#include "Core/PowerPC/PowerPC.h"
#include "Core/PowerPC/SignatureDB.h"
#include "DiscIO/Enums.h"
#include "DiscIO/NANDContentLoader.h"
#include "DiscIO/Volume.h"
#include "DiscIO/VolumeCreator.h"
bool CBoot::DVDRead(u64 dvd_offset, u32 output_address, u32 length, bool decrypt)
{
std::vector<u8> buffer(length);
if (!DVDInterface::GetVolume().Read(dvd_offset, length, buffer.data(), decrypt))
return false;
Memory::CopyToEmu(output_address, buffer.data(), length);
return true;
}
void CBoot::Load_FST(bool _bIsWii)
{
if (!DVDInterface::VolumeIsValid())
return;
const DiscIO::IVolume& volume = DVDInterface::GetVolume();
// copy first 20 bytes of disc to start of Mem 1
DVDRead(/*offset*/ 0, /*address*/ 0, /*length*/ 0x20, false);
// copy of game id
Memory::Write_U32(Memory::Read_U32(0x0000), 0x3180);
u32 shift = 0;
if (_bIsWii)
shift = 2;
u32 fst_offset = 0;
u32 fst_size = 0;
u32 max_fst_size = 0;
volume.ReadSwapped(0x0424, &fst_offset, _bIsWii);
volume.ReadSwapped(0x0428, &fst_size, _bIsWii);
volume.ReadSwapped(0x042c, &max_fst_size, _bIsWii);
u32 arena_high = ROUND_DOWN(0x817FFFFF - (max_fst_size << shift), 0x20);
Memory::Write_U32(arena_high, 0x00000034);
// load FST
DVDRead(fst_offset << shift, arena_high, fst_size << shift, _bIsWii);
Memory::Write_U32(arena_high, 0x00000038);
Memory::Write_U32(max_fst_size << shift, 0x0000003c);
}
void CBoot::UpdateDebugger_MapLoaded()
{
Host_NotifyMapLoaded();
}
bool CBoot::FindMapFile(std::string* existing_map_file, std::string* writable_map_file,
std::string* title_id)
{
std::string title_id_str;
size_t name_begin_index;
SConfig& _StartupPara = SConfig::GetInstance();
switch (_StartupPara.m_BootType)
{
case SConfig::BOOT_WII_NAND:
{
const DiscIO::CNANDContentLoader& Loader =
DiscIO::CNANDContentManager::Access().GetNANDLoader(_StartupPara.m_strFilename);
if (Loader.IsValid())
{
u64 TitleID = Loader.GetTitleID();
title_id_str = StringFromFormat("%08X_%08X", (u32)(TitleID >> 32) & 0xFFFFFFFF,
(u32)TitleID & 0xFFFFFFFF);
}
break;
}
case SConfig::BOOT_ELF:
case SConfig::BOOT_DOL:
// Strip the .elf/.dol file extension and directories before the name
name_begin_index = _StartupPara.m_strFilename.find_last_of("/") + 1;
if ((_StartupPara.m_strFilename.find_last_of("\\") + 1) > name_begin_index)
{
name_begin_index = _StartupPara.m_strFilename.find_last_of("\\") + 1;
}
title_id_str = _StartupPara.m_strFilename.substr(
name_begin_index, _StartupPara.m_strFilename.size() - 4 - name_begin_index);
break;
default:
title_id_str = _StartupPara.GetUniqueID();
break;
}
if (writable_map_file)
*writable_map_file = File::GetUserPath(D_MAPS_IDX) + title_id_str + ".map";
if (title_id)
*title_id = title_id_str;
bool found = false;
static const std::string maps_directories[] = {File::GetUserPath(D_MAPS_IDX),
File::GetSysDirectory() + MAPS_DIR DIR_SEP};
for (size_t i = 0; !found && i < ArraySize(maps_directories); ++i)
{
std::string path = maps_directories[i] + title_id_str + ".map";
if (File::Exists(path))
{
found = true;
if (existing_map_file)
*existing_map_file = path;
}
}
return found;
}
bool CBoot::LoadMapFromFilename()
{
std::string strMapFilename;
bool found = FindMapFile(&strMapFilename, nullptr);
if (found && g_symbolDB.LoadMap(strMapFilename))
{
UpdateDebugger_MapLoaded();
return true;
}
return false;
}
// If ipl.bin is not found, this function does *some* of what BS1 does:
// loading IPL(BS2) and jumping to it.
// It does not initialize the hardware or anything else like BS1 does.
bool CBoot::Load_BS2(const std::string& _rBootROMFilename)
{
// CRC32
const u32 USA_v1_0 =
0x6D740AE7; // https://forums.dolphin-emu.org/Thread-unknown-hash-on-ipl-bin?pid=385344#pid385344
const u32 USA_v1_1 =
0xD5E6FEEA; // https://forums.dolphin-emu.org/Thread-unknown-hash-on-ipl-bin?pid=385334#pid385334
const u32 USA_v1_2 =
0x86573808; // https://forums.dolphin-emu.org/Thread-unknown-hash-on-ipl-bin?pid=385399#pid385399
const u32 BRA_v1_0 =
0x667D0B64; // GameCubes sold in Brazil have this IPL. Same as USA v1.2 but localized
const u32 JAP_v1_0 = 0x6DAC1F2A; // Redump
const u32 JAP_v1_1 = 0xD235E3F9; // https://bugs.dolphin-emu.org/issues/8936
const u32 PAL_v1_0 = 0x4F319F43; // Redump
const u32 PAL_v1_2 = 0xAD1B7F16; // Redump
// Load the whole ROM dump
std::string data;
if (!File::ReadFileToString(_rBootROMFilename, data))
return false;
// Use zlibs crc32 implementation to compute the hash
u32 ipl_hash = crc32(0L, Z_NULL, 0);
ipl_hash = crc32(ipl_hash, (const Bytef*)data.data(), (u32)data.size());
std::string ipl_region;
switch (ipl_hash)
{
case USA_v1_0:
case USA_v1_1:
case USA_v1_2:
case BRA_v1_0:
ipl_region = USA_DIR;
break;
case JAP_v1_0:
case JAP_v1_1:
ipl_region = JAP_DIR;
break;
case PAL_v1_0:
case PAL_v1_2:
ipl_region = EUR_DIR;
break;
default:
PanicAlertT("IPL with unknown hash %x", ipl_hash);
break;
}
std::string BootRegion = _rBootROMFilename.substr(_rBootROMFilename.find_last_of(DIR_SEP) - 3, 3);
if (BootRegion != ipl_region)
PanicAlertT("%s IPL found in %s directory. The disc might not be recognized",
ipl_region.c_str(), BootRegion.c_str());
// Run the descrambler over the encrypted section containing BS1/BS2
CEXIIPL::Descrambler((u8*)data.data() + 0x100, 0x1AFE00);
// TODO: Execution is supposed to start at 0xFFF00000, not 0x81200000;
// copying the initial boot code to 0x81200000 is a hack.
// For now, HLE the first few instructions and start at 0x81200150
// to work around this.
Memory::CopyToEmu(0x01200000, data.data() + 0x100, 0x700);
Memory::CopyToEmu(0x01300000, data.data() + 0x820, 0x1AFE00);
PowerPC::ppcState.gpr[3] = 0xfff0001f;
PowerPC::ppcState.gpr[4] = 0x00002030;
PowerPC::ppcState.gpr[5] = 0x0000009c;
PowerPC::ppcState.msr = 0x00002030;
PowerPC::ppcState.spr[SPR_HID0] = 0x0011c464;
PowerPC::ppcState.spr[SPR_IBAT0U] = 0x80001fff;
PowerPC::ppcState.spr[SPR_IBAT0L] = 0x00000002;
PowerPC::ppcState.spr[SPR_IBAT3U] = 0xfff0001f;
PowerPC::ppcState.spr[SPR_IBAT3L] = 0xfff00001;
PowerPC::ppcState.spr[SPR_DBAT0U] = 0x80001fff;
PowerPC::ppcState.spr[SPR_DBAT0L] = 0x00000002;
PowerPC::ppcState.spr[SPR_DBAT1U] = 0xc0001fff;
PowerPC::ppcState.spr[SPR_DBAT1L] = 0x0000002a;
PowerPC::ppcState.spr[SPR_DBAT3U] = 0xfff0001f;
PowerPC::ppcState.spr[SPR_DBAT3L] = 0xfff00001;
PowerPC::DBATUpdated();
PowerPC::IBATUpdated();
PC = 0x81200150;
return true;
}
// Third boot step after BootManager and Core. See Call schedule in BootManager.cpp
bool CBoot::BootUp()
{
SConfig& _StartupPara = SConfig::GetInstance();
NOTICE_LOG(BOOT, "Booting %s", _StartupPara.m_strFilename.c_str());
g_symbolDB.Clear();
// PAL Wii uses NTSC framerate and linecount in 60Hz modes
VideoInterface::Preset(_StartupPara.bNTSC || (_StartupPara.bWii && _StartupPara.bPAL60));
switch (_StartupPara.m_BootType)
{
// GCM and Wii
case SConfig::BOOT_ISO:
{
DVDInterface::SetVolumeName(_StartupPara.m_strFilename);
DVDInterface::SetDiscInside(DVDInterface::VolumeIsValid());
if (!DVDInterface::VolumeIsValid())
return false;
const DiscIO::IVolume& pVolume = DVDInterface::GetVolume();
if ((pVolume.GetVolumeType() == DiscIO::Platform::WII_DISC) != _StartupPara.bWii)
{
PanicAlertT("Warning - starting ISO in wrong console mode!");
}
std::string unique_id = DVDInterface::GetVolume().GetUniqueID();
if (unique_id.size() >= 4)
VideoInterface::SetRegionReg(unique_id.at(3));
std::vector<u8> tmd_buffer = pVolume.GetTMD();
if (!tmd_buffer.empty())
{
WII_IPC_HLE_Interface::ES_DIVerify(tmd_buffer);
}
_StartupPara.bWii = pVolume.GetVolumeType() == DiscIO::Platform::WII_DISC;
// HLE BS2 or not
if (_StartupPara.bHLE_BS2)
{
EmulatedBS2(_StartupPara.bWii);
}
else if (!Load_BS2(_StartupPara.m_strBootROM))
{
// If we can't load the bootrom file we HLE it instead
EmulatedBS2(_StartupPara.bWii);
}
else
{
// Load patches if they weren't already
PatchEngine::LoadPatches();
}
// Scan for common HLE functions
if (_StartupPara.bSkipIdle && _StartupPara.bHLE_BS2 && !_StartupPara.bEnableDebugging)
{
PPCAnalyst::FindFunctions(0x80004000, 0x811fffff, &g_symbolDB);
SignatureDB db;
if (db.Load(File::GetSysDirectory() + TOTALDB))
{
db.Apply(&g_symbolDB);
HLE::PatchFunctions();
db.Clear();
}
}
// Try to load the symbol map if there is one, and then scan it for
// and eventually replace code
if (LoadMapFromFilename())
HLE::PatchFunctions();
break;
}
// DOL
case SConfig::BOOT_DOL:
{
CDolLoader dolLoader(_StartupPara.m_strFilename);
if (!dolLoader.IsValid())
return false;
// Check if we have gotten a Wii file or not
bool dolWii = dolLoader.IsWii();
if (dolWii != _StartupPara.bWii)
{
PanicAlertT("Warning - starting DOL in wrong console mode!");
}
bool BS2Success = false;
if (dolWii)
{
BS2Success = EmulatedBS2(dolWii);
}
else if ((!DVDInterface::VolumeIsValid() ||
DVDInterface::GetVolume().GetVolumeType() != DiscIO::Platform::WII_DISC) &&
!_StartupPara.m_strDefaultISO.empty())
{
DVDInterface::SetVolumeName(_StartupPara.m_strDefaultISO);
BS2Success = EmulatedBS2(dolWii);
}
if (!_StartupPara.m_strDVDRoot.empty())
{
NOTICE_LOG(BOOT, "Setting DVDRoot %s", _StartupPara.m_strDVDRoot.c_str());
DVDInterface::SetVolumeDirectory(_StartupPara.m_strDVDRoot, dolWii,
_StartupPara.m_strApploader, _StartupPara.m_strFilename);
BS2Success = EmulatedBS2(dolWii);
}
DVDInterface::SetDiscInside(DVDInterface::VolumeIsValid());
if (!BS2Success)
{
// Set up MSR and the BAT SPR registers.
UReg_MSR& m_MSR = ((UReg_MSR&)PowerPC::ppcState.msr);
m_MSR.FP = 1;
m_MSR.DR = 1;
m_MSR.IR = 1;
m_MSR.EE = 1;
PowerPC::ppcState.spr[SPR_IBAT0U] = 0x80001fff;
PowerPC::ppcState.spr[SPR_IBAT0L] = 0x00000002;
PowerPC::ppcState.spr[SPR_IBAT4U] = 0x90001fff;
PowerPC::ppcState.spr[SPR_IBAT4L] = 0x10000002;
PowerPC::ppcState.spr[SPR_DBAT0U] = 0x80001fff;
PowerPC::ppcState.spr[SPR_DBAT0L] = 0x00000002;
PowerPC::ppcState.spr[SPR_DBAT1U] = 0xc0001fff;
PowerPC::ppcState.spr[SPR_DBAT1L] = 0x0000002a;
PowerPC::ppcState.spr[SPR_DBAT4U] = 0x90001fff;
PowerPC::ppcState.spr[SPR_DBAT4L] = 0x10000002;
PowerPC::ppcState.spr[SPR_DBAT5U] = 0xd0001fff;
PowerPC::ppcState.spr[SPR_DBAT5L] = 0x1000002a;
PowerPC::DBATUpdated();
PowerPC::IBATUpdated();
dolLoader.Load();
PC = dolLoader.GetEntryPoint();
}
if (LoadMapFromFilename())
HLE::PatchFunctions();
break;
}
// ELF
case SConfig::BOOT_ELF:
{
// load image or create virtual drive from directory
if (!_StartupPara.m_strDVDRoot.empty())
{
NOTICE_LOG(BOOT, "Setting DVDRoot %s", _StartupPara.m_strDVDRoot.c_str());
DVDInterface::SetVolumeDirectory(_StartupPara.m_strDVDRoot, _StartupPara.bWii);
}
else if (!_StartupPara.m_strDefaultISO.empty())
{
NOTICE_LOG(BOOT, "Loading default ISO %s", _StartupPara.m_strDefaultISO.c_str());
DVDInterface::SetVolumeName(_StartupPara.m_strDefaultISO);
}
else
{
DVDInterface::SetVolumeDirectory(_StartupPara.m_strFilename, _StartupPara.bWii);
}
DVDInterface::SetDiscInside(DVDInterface::VolumeIsValid());
// Poor man's bootup
if (_StartupPara.bWii)
SetupWiiMemory(DiscIO::Country::COUNTRY_UNKNOWN);
else
EmulatedBS2_GC(true);
Load_FST(_StartupPara.bWii);
if (!Boot_ELF(_StartupPara.m_strFilename))
return false;
UpdateDebugger_MapLoaded();
Dolphin_Debugger::AddAutoBreakpoints();
break;
}
// Wii WAD
case SConfig::BOOT_WII_NAND:
Boot_WiiWAD(_StartupPara.m_strFilename);
if (LoadMapFromFilename())
HLE::PatchFunctions();
// load default image or create virtual drive from directory
if (!_StartupPara.m_strDVDRoot.empty())
DVDInterface::SetVolumeDirectory(_StartupPara.m_strDVDRoot, true);
else if (!_StartupPara.m_strDefaultISO.empty())
DVDInterface::SetVolumeName(_StartupPara.m_strDefaultISO);
DVDInterface::SetDiscInside(DVDInterface::VolumeIsValid());
break;
// Bootstrap 2 (AKA: Initial Program Loader, "BIOS")
case SConfig::BOOT_BS2:
{
DVDInterface::SetDiscInside(DVDInterface::VolumeIsValid());
if (Load_BS2(_StartupPara.m_strBootROM))
{
if (LoadMapFromFilename())
HLE::PatchFunctions();
}
else
{
return false;
}
break;
}
case SConfig::BOOT_DFF:
// do nothing
break;
default:
{
PanicAlertT("Tried to load an unknown file type.");
return false;
}
}
// HLE jump to loader (homebrew). Disabled when Gecko is active as it interferes with the code
// handler
if (!SConfig::GetInstance().bEnableCheats)
{
HLE::Patch(0x80001800, "HBReload");
Memory::CopyToEmu(0x00001804, "STUBHAXX", 8);
}
// Not part of the binary itself, but either we or Gecko OS might insert
// this, and it doesn't clear the icache properly.
HLE::Patch(0x800018a8, "GeckoCodehandler");
return true;
}
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