ShuriZma
/
project64
mirror of https://github.com/project64/project64.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
project64/Source/Project64-core/N64System/MemoryHandler/PifRamHandler.cpp

783 lines
22 KiB
C++
Raw Blame History

#include "stdafx.h"
#include "PifRamHandler.h"
#include <Project64-core/Debugger.h>
#include <Project64-core/N64System/Mips/MemoryVirtualMem.h>
#include <Project64-core/N64System/Mips/Rumblepak.h>
#include <Project64-core/N64System/Mips/Transferpak.h>
#include <Project64-core/N64System/SystemGlobals.h>
#include <Project64-core/N64System/N64System.h>
PifRamHandler::PifRamHandler(CN64System & System, bool SavesReadOnly) :
m_MMU(System.m_MMU_VM),
m_PC(System.m_Reg.m_PROGRAM_COUNTER),
m_Eeprom(SavesReadOnly)
{
SystemReset();
System.RegisterCallBack(CN64SystemCB_Reset, this, (CN64System::CallBackFunction)stSystemReset);
}
bool PifRamHandler::Read32(uint32_t Address, uint32_t & Value)
{
Address &= 0x1FFFFFFF;
if (Address < 0x1FC007C0)
{
//Value = swap32by8(*(uint32_t *)(&PifRom[PAddr - 0x1FC00000]));
Value = 0;
if (HaveDebugger())
{
g_Notify->BreakPoint(__FILE__, __LINE__);
}
}
else if (Address < 0x1FC00800)
{
Value = *(uint32_t *)(&m_PifRam[Address - 0x1FC007C0]);
Value = swap32by8(Value);
}
else
{
Value = 0;
if (HaveDebugger())
{
g_Notify->BreakPoint(__FILE__, __LINE__);
}
}
if (GenerateLog() && LogPRDirectMemLoads() && Address >= 0x1FC007C0 && Address <= 0x1FC007FC)
{
LogMessage("%08X: read word from PIF RAM at 0x%X (%08X)", m_PC, Address - 0x1FC007C0, Value);
}
return true;
}
bool PifRamHandler::Write32(uint32_t Address, uint32_t Value, uint32_t Mask)
{
Address &= 0x1FFFFFFF;
if (GenerateLog() && LogPRDirectMemStores() && Address >= 0x1FC007C0 && Address <= 0x1FC007FC)
{
LogMessage("%08X: Writing 0x%08X to PIF RAM at 0x%X", m_PC, Value, Address - 0x1FC007C0);
}
if (Address < 0x1FC007C0)
{
//Write to pif rom ignored
}
else if (Address < 0x1FC00800)
{
uint32_t SwappedMask = swap32by8(Mask);
Value = ((*(uint32_t *)(&m_PifRam[Address - 0x1FC007C0])) & ~SwappedMask) | (swap32by8(Value) & SwappedMask);
*(uint32_t *)(&m_PifRam[Address - 0x1FC007C0]) = Value;
if (Address == 0x1FC007FC)
{
ControlWrite();
}
}
return true;
}
void PifRamHandler::DMA_READ()
{
uint8_t * PifRamPos = m_PifRam;
uint8_t * RDRAM = g_MMU->Rdram();
uint32_t & SI_DRAM_ADDR_REG = (uint32_t &)g_Reg->SI_DRAM_ADDR_REG;
if ((int32_t)SI_DRAM_ADDR_REG > (int32_t)g_System->RdramSize())
{
if (bShowPifRamErrors())
{
g_Notify->DisplayError(stdstr_f("%s\nSI_DRAM_ADDR_REG not in RDRAM space", __FUNCTION__).c_str());
}
return;
}
ControlRead();
if (CDebugSettings::HaveDebugger())
{
g_Debugger->PIFReadStarted();
}
SI_DRAM_ADDR_REG &= 0xFFFFFFF8;
if ((int32_t)SI_DRAM_ADDR_REG < 0)
{
int32_t count, RdramPos;
RdramPos = (int32_t)SI_DRAM_ADDR_REG;
for (count = 0; count < 0x40; count++, RdramPos++)
{
if (RdramPos < 0)
{
continue;
}
RDRAM[RdramPos ^ 3] = m_PifRam[count];
}
}
else
{
for (size_t i = 0; i < 64; i++)
{
RDRAM[(SI_DRAM_ADDR_REG + i) ^ 3] = PifRamPos[i];
}
}
if (LogPRDMAMemStores())
{
int32_t count;
char HexData[100], AsciiData[100], Addon[20];
LogMessage("\tData DMAed to RDRAM:");
LogMessage("\t--------------------");
for (count = 0; count < 16; count++)
{
if ((count % 4) == 0)
{
HexData[0] = '\0';
AsciiData[0] = '\0';
}
sprintf(Addon, "%02X %02X %02X %02X",
m_PifRam[(count << 2) + 0], m_PifRam[(count << 2) + 1],
m_PifRam[(count << 2) + 2], m_PifRam[(count << 2) + 3]);
strcat(HexData, Addon);
if (((count + 1) % 4) != 0)
{
sprintf(Addon, "-");
strcat(HexData, Addon);
}
sprintf(Addon, "%c%c%c%c",
m_PifRam[(count << 2) + 0], m_PifRam[(count << 2) + 1],
m_PifRam[(count << 2) + 2], m_PifRam[(count << 2) + 3]);
strcat(AsciiData, Addon);
if (((count + 1) % 4) == 0)
{
LogMessage("\t%s %s", HexData, AsciiData);
}
}
LogMessage("");
}
if (g_System->bRandomizeSIPIInterrupts())
{
if (g_System->bDelaySI())
{
g_SystemTimer->SetTimer(CSystemTimer::SiTimer, 0x900 + (g_Random->next() % 0x40), false);
}
else
{
g_SystemTimer->SetTimer(CSystemTimer::SiTimer, g_Random->next() % 0x40, false);
}
}
else
{
if (g_System->bDelaySI())
{
g_SystemTimer->SetTimer(CSystemTimer::SiTimer, 0x900, false);
}
else
{
g_Reg->MI_INTR_REG |= MI_INTR_SI;
g_Reg->SI_STATUS_REG |= SI_STATUS_INTERRUPT;
g_Reg->CheckInterrupts();
}
}
}
void PifRamHandler::DMA_WRITE()
{
uint8_t * PifRamPos = m_PifRam;
uint32_t & SI_DRAM_ADDR_REG = (uint32_t &)g_Reg->SI_DRAM_ADDR_REG;
if ((int32_t)SI_DRAM_ADDR_REG > (int32_t)g_System->RdramSize())
{
if (bShowPifRamErrors())
{
g_Notify->DisplayError("SI DMA\nSI_DRAM_ADDR_REG not in RDRAM space");
}
return;
}
SI_DRAM_ADDR_REG &= 0xFFFFFFF8;
uint8_t * RDRAM = g_MMU->Rdram();
if ((int32_t)SI_DRAM_ADDR_REG < 0)
{
int32_t RdramPos = (int32_t)SI_DRAM_ADDR_REG;
for (int32_t count = 0; count < 0x40; count++, RdramPos++)
{
if (RdramPos < 0)
{
m_PifRam[count] = 0;
continue;
}
m_PifRam[count] = RDRAM[RdramPos ^ 3];
}
}
else
{
for (size_t i = 0; i < 64; i++)
{
PifRamPos[i] = RDRAM[(SI_DRAM_ADDR_REG + i) ^ 3];
}
}
if (LogPRDMAMemLoads())
{
int32_t count;
char HexData[100], AsciiData[100], Addon[20];
LogMessage("");
LogMessage("\tData DMAed to the PIF RAM:");
LogMessage("\t--------------------------");
for (count = 0; count < 16; count++)
{
if ((count % 4) == 0)
{
HexData[0] = '\0';
AsciiData[0] = '\0';
}
sprintf(Addon, "%02X %02X %02X %02X",
m_PifRam[(count << 2) + 0], m_PifRam[(count << 2) + 1],
m_PifRam[(count << 2) + 2], m_PifRam[(count << 2) + 3]);
strcat(HexData, Addon);
if (((count + 1) % 4) != 0)
{
sprintf(Addon, "-");
strcat(HexData, Addon);
}
sprintf(Addon, "%c%c%c%c",
m_PifRam[(count << 2) + 0], m_PifRam[(count << 2) + 1],
m_PifRam[(count << 2) + 2], m_PifRam[(count << 2) + 3]);
strcat(AsciiData, Addon);
if (((count + 1) % 4) == 0)
{
LogMessage("\t%s %s", HexData, AsciiData);
}
}
LogMessage("");
}
ControlWrite();
if (g_System->bDelaySI())
{
g_SystemTimer->SetTimer(CSystemTimer::SiTimer, 0x900, false);
}
else
{
g_Reg->MI_INTR_REG |= MI_INTR_SI;
g_Reg->SI_STATUS_REG |= SI_STATUS_INTERRUPT;
g_Reg->CheckInterrupts();
}
}
void PifRamHandler::CicNus6105(const char * Challenge, char * Respone, int32_t Length)
{
// clang-format off
static const char lut0[0x10] = {
0x4, 0x7, 0xA, 0x7, 0xE, 0x5, 0xE, 0x1,
0xC, 0xF, 0x8, 0xF, 0x6, 0x3, 0x6, 0x9,
};
static const char lut1[0x10] = {
0x4, 0x1, 0xA, 0x7, 0xE, 0x5, 0xE, 0x1,
0xC, 0x9, 0x8, 0x5, 0x6, 0x3, 0xC, 0x9,
};
// clang-format on
const char * lut = lut0;
char Key = 0xB;
for (int32_t i = 0; i < Length; i++)
{
Respone[i] = (Key + 5 * Challenge[i]) & 0xF;
Key = lut[Respone[i]];
int32_t Sgn = (Respone[i] >> 3) & 0x1;
int32_t Mag = ((Sgn == 1) ? ~Respone[i] : Respone[i]) & 0x7;
int32_t Mod = (Mag % 3 == 1) ? Sgn : 1 - Sgn;
if (lut == lut1 && (Respone[i] == 0x1 || Respone[i] == 0x9))
{
Mod = 1;
}
if (lut == lut1 && (Respone[i] == 0xB || Respone[i] == 0xE))
{
Mod = 0;
}
lut = (Mod == 1) ? lut1 : lut0;
}
}
void PifRamHandler::ControlRead()
{
if (m_PifRam[0x3F] == 0x2)
{
return;
}
CONTROL * Controllers = g_Plugins->Control()->PluginControllers();
int32_t Channel = 0;
for (int32_t CurPos = 0; CurPos < 0x40; CurPos++)
{
switch (m_PifRam[CurPos])
{
case 0x00:
Channel += 1;
if (Channel > 6)
{
CurPos = 0x40;
}
break;
case 0xFD: CurPos = 0x40; break;
case 0xFE: CurPos = 0x40; break;
case 0xFF:
case 0xB4:
case 0x56:
case 0xB8:
break;
default:
if ((m_PifRam[CurPos] & 0xC0) == 0)
{
if (Channel < 4)
{
if (Controllers[Channel].Present && Controllers[Channel].RawData)
{
if (g_Plugins->Control()->ReadController)
{
g_Plugins->Control()->ReadController(Channel, &m_PifRam[CurPos]);
}
}
else
{
ReadControllerCommand(Channel, &m_PifRam[CurPos]);
}
}
CurPos += m_PifRam[CurPos] + (m_PifRam[CurPos + 1] & 0x3F) + 1;
Channel += 1;
}
else
{
if (CurPos != 0x27 && bShowPifRamErrors())
{
g_Notify->DisplayError(stdstr_f("Unknown command in PifRamRead(%X)", m_PifRam[CurPos]).c_str());
}
CurPos = 0x40;
}
break;
}
}
if (g_Plugins->Control()->ReadController)
{
g_Plugins->Control()->ReadController(-1, nullptr);
}
}
void PifRamHandler::ControlWrite()
{
enum
{
CHALLENGE_LENGTH = 0x20
};
CONTROL * Controllers = g_Plugins->Control()->PluginControllers();
int32_t Channel = 0, CurPos;
if (m_PifRam[0x3F] > 0x1)
{
switch (m_PifRam[0x3F])
{
case 0x02:
{
// Format the 'challenge' message into 30 nibbles for X-Scale's CIC code
char Challenge[30], Response[30];
for (int32_t i = 0; i < 15; i++)
{
Challenge[i * 2] = (m_PifRam[48 + i] >> 4) & 0x0f;
Challenge[i * 2 + 1] = m_PifRam[48 + i] & 0x0f;
}
CicNus6105(Challenge, Response, CHALLENGE_LENGTH - 2);
uint64_t ResponseValue = 0;
m_PifRam[46] = m_PifRam[47] = 0x00;
for (int32_t z = 8; z > 0; z--)
{
ResponseValue = (ResponseValue << 8) | ((Response[(z - 1) * 2] << 4) + Response[(z - 1) * 2 + 1]);
}
memcpy(&m_PifRam[48], &ResponseValue, sizeof(uint64_t));
ResponseValue = 0;
for (int32_t z = 7; z > 0; z--)
{
ResponseValue = (ResponseValue << 8) | ((Response[((z + 8) - 1) * 2] << 4) + Response[((z + 8) - 1) * 2 + 1]);
}
memcpy(&m_PifRam[56], &ResponseValue, sizeof(uint64_t));
break;
}
case 0x08:
m_PifRam[0x3F] = 0;
g_Reg->MI_INTR_REG |= MI_INTR_SI;
g_Reg->SI_STATUS_REG |= SI_STATUS_INTERRUPT;
g_Reg->CheckInterrupts();
break;
case 0x10:
memset(m_PifRom, 0, 0x7C0);
break;
case 0x30:
m_PifRam[0x3F] = 0x80;
break;
case 0xC0:
memset(m_PifRam, 0, 0x40);
break;
default:
if (bShowPifRamErrors())
{
g_Notify->DisplayError(stdstr_f("Unknown PifRam control: %d", m_PifRam[0x3F]).c_str());
}
}
return;
}
for (CurPos = 0; CurPos < 0x40; CurPos++)
{
switch (m_PifRam[CurPos])
{
case 0x00:
Channel += 1;
if (Channel > 6)
{
CurPos = 0x40;
}
break;
case 0xFD: CurPos = 0x40; break;
case 0xFE: CurPos = 0x40; break;
case 0xFF:
case 0xB4:
case 0x56:
case 0xB8:
break;
default:
if ((m_PifRam[CurPos] & 0xC0) == 0)
{
if (Channel < 4)
{
if (Controllers[Channel].Present && Controllers[Channel].RawData)
{
if (g_Plugins->Control()->ControllerCommand)
{
g_Plugins->Control()->ControllerCommand(Channel, &m_PifRam[CurPos]);
}
}
else
{
ProcessControllerCommand(Channel, &m_PifRam[CurPos]);
}
}
else if (Channel == 4)
{
m_Eeprom.EepromCommand(&m_PifRam[CurPos]);
}
else
{
if (bShowPifRamErrors())
{
g_Notify->DisplayError("Command on channel 5?");
}
}
CurPos += m_PifRam[CurPos] + (m_PifRam[CurPos + 1] & 0x3F) + 1;
Channel += 1;
}
else
{
if (CurPos != 0x27 && bShowPifRamErrors())
{
g_Notify->DisplayError(stdstr_f("Unknown Command in PifRamWrite(%X)", m_PifRam[CurPos]).c_str());
}
CurPos = 0x40;
}
break;
}
}
m_PifRam[0x3F] = 0;
if (g_Plugins->Control()->ControllerCommand)
{
g_Plugins->Control()->ControllerCommand(-1, nullptr);
}
}
void PifRamHandler::LogControllerPakData(const char * Description)
{
int32_t count, count2;
char HexData[100], AsciiData[100], Addon[20];
LogMessage("\t%s:", Description);
LogMessage("\t------------------------------");
for (count = 0; count < 16; count++)
{
if ((count % 4) == 0)
{
HexData[0] = '\0';
AsciiData[0] = '\0';
}
sprintf(Addon, "%02X %02X %02X %02X",
m_PifRam[(count << 2) + 0], m_PifRam[(count << 2) + 1],
m_PifRam[(count << 2) + 2], m_PifRam[(count << 2) + 3]);
strcat(HexData, Addon);
if (((count + 1) % 4) != 0)
{
sprintf(Addon, "-");
strcat(HexData, Addon);
}
Addon[0] = 0;
for (count2 = 0; count2 < 4; count2++)
{
if (m_PifRam[(count << 2) + count2] < 30)
{
strcat(Addon, ".");
}
else
{
char tmp[2];
sprintf(tmp, "%c", m_PifRam[(count << 2) + count2]);
strcat(Addon, tmp);
}
}
strcat(AsciiData, Addon);
if (((count + 1) % 4) == 0)
{
LogMessage("\t%s %s", HexData, AsciiData);
}
}
LogMessage("");
}
void PifRamHandler::ReadControllerCommand(int32_t Control, uint8_t * Command)
{
CONTROL * Controllers = g_Plugins->Control()->PluginControllers();
switch (Command[2])
{
case 0x01: // Read controller
if (Controllers[Control].Present != PRESENT_NONE)
{
if (bShowPifRamErrors())
{
if (Command[0] != 1 || Command[1] != 4)
{
g_Notify->DisplayError("What am I meant to do with this controller command?");
}
}
const uint32_t buttons = g_BaseSystem->GetButtons(Control);
memcpy(&Command[3], &buttons, sizeof(uint32_t));
}
break;
case 0x02: // Read from controller pak
if (Controllers[Control].Present != PRESENT_NONE)
{
switch (Controllers[Control].Plugin)
{
case PLUGIN_RAW:
if (g_Plugins->Control()->ReadController)
{
g_Plugins->Control()->ReadController(Control, Command);
}
break;
}
}
break;
case 0x03: // Write controller pak
if (Controllers[Control].Present != PRESENT_NONE)
{
switch (Controllers[Control].Plugin)
{
case PLUGIN_RAW:
if (g_Plugins->Control()->ReadController)
{
g_Plugins->Control()->ReadController(Control, Command);
}
break;
}
}
break;
}
}
void PifRamHandler::ProcessControllerCommand(int32_t Control, uint8_t * Command)
{
CONTROL * Controllers = g_Plugins->Control()->PluginControllers();
switch (Command[2])
{
case 0x00: // Check
case 0xFF: // Reset and check?
if ((Command[1] & 0x80) != 0)
{
break;
}
if (bShowPifRamErrors())
{
if (Command[0] != 1 || Command[1] != 3)
{
g_Notify->DisplayError("What am I meant to do with this controller command?");
}
}
if (Controllers[Control].Present != PRESENT_NONE)
{
if (Controllers[Control].Present != PRESENT_MOUSE)
{
//N64 Controller
Command[3] = 0x05;
Command[4] = 0x00;
switch (Controllers[Control].Plugin)
{
case PLUGIN_TRANSFER_PAK:
case PLUGIN_RUMBLE_PAK:
case PLUGIN_MEMPAK:
case PLUGIN_RAW:
Command[5] = 1;
break;
default: Command[5] = 0; break;
}
}
else //if (Controllers[Control].Present == PRESENT_MOUSE)
{
//N64 Mouse
Command[3] = 0x02;
Command[4] = 0x00;
Command[5] = 0x00;
}
}
else
{
Command[1] |= 0x80;
}
break;
case 0x01: // Read controller
if (bShowPifRamErrors())
{
if (Command[0] != 1 || Command[1] != 4)
{
g_Notify->DisplayError("What am I meant to do with this controller command?");
}
}
if (Controllers[Control].Present == PRESENT_NONE)
{
Command[1] |= 0x80;
}
break;
case 0x02: // Read from controller pak
if (LogControllerPak())
{
LogControllerPakData("Read: before getting results");
}
if (bShowPifRamErrors())
{
if (Command[0] != 3 || Command[1] != 33)
{
g_Notify->DisplayError("What am I meant to do with this controller command?");
}
}
if (Controllers[Control].Present != PRESENT_NONE)
{
uint32_t address = (Command[3] << 8) | (Command[4] & 0xE0);
uint8_t * data = &Command[5];
switch (Controllers[Control].Plugin)
{
case PLUGIN_RUMBLE_PAK: Rumblepak::ReadFrom(address, data); break;
case PLUGIN_MEMPAK: g_Mempak->ReadFrom(Control, address, data); break;
case PLUGIN_TRANSFER_PAK: Transferpak::ReadFrom((uint16_t)address, data); break;
case PLUGIN_RAW:
if (g_Plugins->Control()->ControllerCommand)
{
g_Plugins->Control()->ControllerCommand(Control, Command);
}
break;
default:
memset(&Command[5], 0, 0x20);
}
if (Controllers[Control].Plugin != PLUGIN_RAW)
{
Command[0x25] = CMempak::CalculateCrc(data);
}
}
else
{
Command[1] |= 0x80;
}
if (LogControllerPak())
{
LogControllerPakData("Read: after getting results");
}
break;
case 0x03: // Write controller pak
if (LogControllerPak())
{
LogControllerPakData("Write: before processing");
}
if (bShowPifRamErrors())
{
if (Command[0] != 35 || Command[1] != 1)
{
g_Notify->DisplayError("What am I meant to do with this controller command?");
}
}
if (Controllers[Control].Present != PRESENT_NONE)
{
uint32_t address = (Command[3] << 8) | (Command[4] & 0xE0);
uint8_t * data = &Command[5];
switch (Controllers[Control].Plugin)
{
case PLUGIN_MEMPAK: g_Mempak->WriteTo(Control, address, data); break;
case PLUGIN_RUMBLE_PAK: Rumblepak::WriteTo(Control, address, data); break;
case PLUGIN_TRANSFER_PAK: Transferpak::WriteTo((uint16_t)address, data); break;
case PLUGIN_RAW:
if (g_Plugins->Control()->ControllerCommand)
{
g_Plugins->Control()->ControllerCommand(Control, Command);
}
break;
}
if (Controllers[Control].Plugin != PLUGIN_RAW)
{
Command[0x25] = CMempak::CalculateCrc(data);
}
}
else
{
Command[1] |= 0x80;
}
if (LogControllerPak())
{
LogControllerPakData("Write: after processing");
}
break;
default:
if (bShowPifRamErrors())
{
g_Notify->DisplayError(stdstr_f("Unknown ControllerCommand %d", Command[2]).c_str());
}
}
}
void PifRamHandler::SystemReset(void)
{
memset(m_PifRam, 0, sizeof(m_PifRam));
memset(m_PifRom, 0, sizeof(m_PifRom));
}
uint32_t PifRamHandler::swap32by8(uint32_t word)
{
const uint32_t swapped =
#if defined(_MSC_VER)
_byteswap_ulong(word)
#elif defined(__GNUC__)
__builtin_bswap32(word)
#else
(word & 0x000000FFul) << 24 | (word & 0x0000FF00ul) << 8 | (word & 0x00FF0000ul) >> 8 | (word & 0xFF000000ul) >> 24
#endif
;
return (swapped & 0xFFFFFFFFul);
}
Reference in New Issue View Git Blame Copy Permalink