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

225 lines
7.3 KiB
C++

/****************************************************************************
* *
* 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 <Project64-core/N64System/Mips/FlashRam.h>
#include <Project64-core/N64System/SystemGlobals.h>
#include <Project64-core/N64System/Mips/MemoryVirtualMem.h>
#include <Common/path.h>
CFlashram::CFlashram(bool ReadOnly) :
m_FlashRamPointer(NULL),
m_FlashFlag(FLASHRAM_MODE_NOPES),
m_FlashStatus(0),
m_FlashRAM_Offset(0),
m_ReadOnly(ReadOnly)
{
}
CFlashram::~CFlashram()
{
}
void CFlashram::DmaFromFlashram(uint8_t * dest, int32_t StartOffset, int32_t len)
{
uint8_t FlipBuffer[0x10000];
switch (m_FlashFlag)
{
case FLASHRAM_MODE_READ:
if (!m_File.IsOpen() && !LoadFlashram())
{
return;
}
if (len > sizeof(FlipBuffer))
{
if (bHaveDebugger())
{
g_Notify->DisplayError(stdstr_f("%s: DmaFromFlashram FlipBuffer to small (len: %d)", __FUNCTION__, len).c_str());
}
len = sizeof(FlipBuffer);
}
if ((len & 3) != 0)
{
if (bHaveDebugger())
{
g_Notify->DisplayError(stdstr_f("%s: Unaligned flash ram read ???", __FUNCTION__).c_str());
}
return;
}
memset(FlipBuffer, 0, sizeof(FlipBuffer));
StartOffset = StartOffset << 1;
m_File.Seek(StartOffset, CFile::begin);
m_File.Read(FlipBuffer, len);
for (int32_t count = m_File.GetLength(); count < len; count++)
{
FlipBuffer[count] = 0xFF;
}
for (int32_t count = 0; count < len; count += 4)
{
*(uint32_t *)(dest + count) = *(uint32_t *)&FlipBuffer[count];
}
break;
case FLASHRAM_MODE_STATUS:
if (StartOffset != 0 && len != 8)
{
if (bHaveDebugger())
{
g_Notify->DisplayError(stdstr_f("%s: Reading m_FlashStatus not being handled correctly\nStart: %X len: %X", __FUNCTION__, StartOffset, len).c_str());
}
}
*((uint32_t *)(dest)+0) = (uint32_t)((m_FlashStatus >> 32) & 0xFFFFFFFF);
*((uint32_t *)(dest)+1) = (uint32_t)(m_FlashStatus & 0xFFFFFFFF);
break;
default:
if (bHaveDebugger())
{
g_Notify->DisplayError(stdstr_f("%s: Start: %X, Offset: %X len: %X", __FUNCTION__, dest - g_MMU->Rdram(), StartOffset, len).c_str());
}
}
}
void CFlashram::DmaToFlashram(uint8_t * Source, int32_t StartOffset, int32_t len)
{
switch (m_FlashFlag)
{
case FLASHRAM_MODE_WRITE:
m_FlashRamPointer = Source;
break;
default:
if (bHaveDebugger())
{
g_Notify->DisplayError(stdstr_f("%s: Start: %X, Offset: %X len: %X", __FUNCTION__, Source - g_MMU->Rdram(), StartOffset, len).c_str());
}
}
}
uint32_t CFlashram::ReadFromFlashStatus(uint32_t PAddr)
{
switch (PAddr)
{
case 0x08000000: return (uint32_t)(m_FlashStatus >> 32);
default:
if (bHaveDebugger())
{
g_Notify->DisplayError(stdstr_f("%s: PAddr (%X)", __FUNCTION__, PAddr).c_str());
}
break;
}
return (uint32_t)(m_FlashStatus >> 32);
}
bool CFlashram::LoadFlashram()
{
CPath FileName(g_Settings->LoadStringVal(Directory_NativeSave).c_str(), stdstr_f("%s.fla", g_Settings->LoadStringVal(Game_GameName).c_str()).c_str());
if (g_Settings->LoadBool(Setting_UniqueSaveDir))
{
FileName.AppendDirectory(g_Settings->LoadStringVal(Game_UniqueSaveDir).c_str());
}
if (!FileName.DirectoryExists())
{
FileName.DirectoryCreate();
}
if (!m_File.Open(FileName, (m_ReadOnly ? CFileBase::modeRead : CFileBase::modeReadWrite) | CFileBase::modeNoTruncate | CFileBase::modeCreate))
{
#ifdef _WIN32
WriteTrace(TraceN64System, TraceError, "Failed to open (%s), ReadOnly = %d, LastError = %X", (const char *)FileName, m_ReadOnly, GetLastError());
#else
WriteTrace(TraceN64System, TraceError, "Failed to open (%s), ReadOnly = %d", (const char *)FileName, m_ReadOnly);
#endif
g_Notify->DisplayError(GS(MSG_FAIL_OPEN_FLASH));
return false;
}
m_File.SeekToBegin();
return true;
}
void CFlashram::WriteToFlashCommand(uint32_t FlashRAM_Command)
{
uint8_t EmptyBlock[16 * sizeof(int64_t)];
switch (FlashRAM_Command & 0xFF000000)
{
case 0xD2000000:
switch (m_FlashFlag)
{
case FLASHRAM_MODE_NOPES: break;
case FLASHRAM_MODE_READ: break;
case FLASHRAM_MODE_STATUS: break;
case FLASHRAM_MODE_ERASE:
memset(EmptyBlock, 0xFF, sizeof(EmptyBlock));
if (!m_File.IsOpen() && !LoadFlashram())
{
return;
}
if (!m_ReadOnly)
{
m_File.Seek(m_FlashRAM_Offset, CFile::begin);
m_File.Write(EmptyBlock, sizeof(EmptyBlock));
}
break;
case FLASHRAM_MODE_WRITE:
if (!m_File.IsOpen() && !LoadFlashram())
{
return;
}
{
uint8_t FlipBuffer[sizeof(EmptyBlock)];
uint8_t * FlashRamPointer = m_FlashRamPointer;
memset(FlipBuffer, 0, sizeof(FlipBuffer));
memcpy(&FlipBuffer[0], FlashRamPointer, sizeof(EmptyBlock));
if (!m_ReadOnly)
{
m_File.Seek(m_FlashRAM_Offset, CFile::begin);
m_File.Write(FlipBuffer, sizeof(EmptyBlock));
}
}
break;
default:
g_Notify->DisplayError(stdstr_f("Writing %X to flash ram command register\nm_FlashFlag: %d", FlashRAM_Command, m_FlashFlag).c_str());
}
m_FlashFlag = FLASHRAM_MODE_NOPES;
break;
case 0xE1000000:
m_FlashFlag = FLASHRAM_MODE_STATUS;
m_FlashStatus = 0x1111800100C2001E;
break;
case 0xF0000000:
case 0x00000000:
m_FlashFlag = FLASHRAM_MODE_READ;
m_FlashStatus = 0x11118004F0000000;
break;
case 0x4B000000:
m_FlashRAM_Offset = (FlashRAM_Command & 0xFFFF) * sizeof(EmptyBlock);
break;
case 0x78000000:
m_FlashFlag = FLASHRAM_MODE_ERASE;
m_FlashStatus = 0x1111800800C2001E;
break;
case 0xB4000000:
m_FlashFlag = FLASHRAM_MODE_WRITE; //????
break;
case 0xA5000000:
m_FlashRAM_Offset = (FlashRAM_Command & 0xFFFF) * sizeof(EmptyBlock);
m_FlashStatus = 0x1111800400C2001E;
break;
default:
if (bHaveDebugger())
{
g_Notify->DisplayError(stdstr_f("Writing %X to flash ram command register", FlashRAM_Command).c_str());
}
}
}