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project64/Source/Project64-core/N64System/Mips/PifRam.cpp

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/****************************************************************************
* *
* Project64 - A Nintendo 64 emulator. *
* http://www.pj64-emu.com/ *
* Copyright (C) 2012 Project64. All rights reserved. *
* *
* License: *
* GNU/GPLv2 http://www.gnu.org/licenses/gpl-2.0.html *
* *
****************************************************************************/
#include "stdafx.h"
#include <stdio.h>
#include <Project64-core/N64System/Mips/PifRam.h>
#include <Project64-core/N64System/SystemGlobals.h>
#include <Project64-core/Plugins/ControllerPlugin.h>
#include <Project64-core/N64System/Mips/RegisterClass.h>
#include <Project64-core/N64System/Mips/MemoryVirtualMem.h>
#include <Project64-core/N64System/N64Class.h>
#include <Project64-core/N64System/Mips/Transferpak.h>
#include <Project64-core/N64System/Mips/Rumblepak.h>
#include <Project64-core/N64System/Mips/Mempak.h>
#include <Project64-core/Logging.h>
int32_t CPifRamSettings::m_RefCount = 0;
bool CPifRamSettings::m_bShowPifRamErrors = false;
CPifRamSettings::CPifRamSettings()
{
m_RefCount += 1;
if (m_RefCount == 1)
{
g_Settings->RegisterChangeCB(Debugger_ShowPifErrors, NULL, RefreshSettings);
RefreshSettings(NULL);
}
}
CPifRamSettings::~CPifRamSettings()
{
m_RefCount -= 1;
if (m_RefCount == 0)
{
g_Settings->UnregisterChangeCB(Debugger_ShowPifErrors, NULL, RefreshSettings);
}
}
void CPifRamSettings::RefreshSettings(void *)
{
m_bShowPifRamErrors = g_Settings->LoadBool(Debugger_ShowPifErrors);
}
CPifRam::CPifRam(bool SavesReadOnly) :
CEeprom(SavesReadOnly)
{
Reset();
}
CPifRam::~CPifRam()
{
}
void CPifRam::Reset()
{
memset(m_PifRam, 0, sizeof(m_PifRam));
memset(m_PifRom, 0, sizeof(m_PifRom));
}
void CPifRam::n64_cic_nus_6105(char challenge[], char respone[], int32_t length)
{
static char lut0[0x10] = {
0x4, 0x7, 0xA, 0x7, 0xE, 0x5, 0xE, 0x1,
0xC, 0xF, 0x8, 0xF, 0x6, 0x3, 0x6, 0x9
};
static char lut1[0x10] = {
0x4, 0x1, 0xA, 0x7, 0xE, 0x5, 0xE, 0x1,
0xC, 0x9, 0x8, 0x5, 0x6, 0x3, 0xC, 0x9
};
char key, *lut;
int32_t i, sgn, mag, mod;
for (key = 0xB, lut = lut0, i = 0; i < length; i++)
{
respone[i] = (key + 5 * challenge[i]) & 0xF;
key = lut[respone[i]];
sgn = (respone[i] >> 3) & 0x1;
mag = ((sgn == 1) ? ~respone[i] : respone[i]) & 0x7;
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 CPifRam::PifRamRead()
{
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: break;
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, NULL);
}
}
void CPifRam::PifRamWrite()
{
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;
}
n64_cic_nus_6105(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("Unkown 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: break;
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)
{
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, NULL);
}
}
void CPifRam::SI_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;
}
PifRamRead();
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->bDelaySI())
{
g_SystemTimer->SetTimer(CSystemTimer::SiTimer, 0x900 + (g_Random->next() % 0x40), false);
}
else
{
g_SystemTimer->SetTimer(CSystemTimer::SiTimer, g_Random->next() % 0x40, false);
//g_Reg->MI_INTR_REG |= MI_INTR_SI;
//g_Reg->SI_STATUS_REG |= SI_STATUS_INTERRUPT;
//g_Reg->CheckInterrupts();
}
}
void CPifRam::SI_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("");
}
PifRamWrite();
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 CPifRam::ProcessControllerCommand(int32_t Control, uint8_t * Command)
{
CONTROL * Controllers = g_Plugins->Control()->PluginControllers();
switch (Command[2])
{
case 0x00: // check
case 0xFF: // reset & 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 != 0)
{
Command[3] = 0x05;
Command[4] = 0x00;
switch (Controllers[Control].Plugin)
{
case PLUGIN_TANSFER_PAK:
case PLUGIN_RUMBLE_PAK:
case PLUGIN_MEMPAK:
case PLUGIN_RAW:
Command[5] = 1; break;
default: Command[5] = 0; break;
}
}
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 == false)
{
Command[1] |= 0x80;
}
break;
case 0x02: //read from controller pack
if (LogControllerPak())
{
LogControllerPakData("Read: Before Gettting 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 != 0)
{
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_TANSFER_PAK: Transferpak::ReadFrom(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 Gettting 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 == true)
{
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_TANSFER_PAK: Transferpak::WriteTo(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 CPifRam::ReadControllerCommand(int32_t Control, uint8_t * Command)
{
CONTROL * Controllers = g_Plugins->Control()->PluginControllers();
switch (Command[2])
{
case 0x01: // read controller
if (Controllers[Control].Present != 0)
{
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 pack
if (Controllers[Control].Present != 0)
{
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 != 0)
{
switch (Controllers[Control].Plugin)
{
case PLUGIN_RAW: if (g_Plugins->Control()->ReadController) { g_Plugins->Control()->ReadController(Control, Command); } break;
}
}
break;
}
}
void CPifRam::LogControllerPakData(const char * Description)
{
uint8_t * PIF_Ram = g_MMU->PifRam();
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",
PIF_Ram[(count << 2) + 0], PIF_Ram[(count << 2) + 1],
PIF_Ram[(count << 2) + 2], PIF_Ram[(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 (PIF_Ram[(count << 2) + count2] < 30)
{
strcat(Addon, ".");
}
else
{
sprintf(Addon, "%s%c", Addon, PIF_Ram[(count << 2) + count2]);
}
}
strcat(AsciiData, Addon);
if (((count + 1) % 4) == 0)
{
LogMessage("\t%s %s", HexData, AsciiData);
}
}
LogMessage("");
}
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