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

244 lines
8.0 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 "FlashRam.h"
#include <Project64-core/N64System/SystemGlobals.h>
#include <Project64-core/N64System/Mips/MemoryClass.h>
#include <Common/path.h>
#include <Windows.h>
CFlashram::CFlashram(bool ReadOnly) :
m_FlashRamPointer(NULL),
m_FlashFlag(FLASHRAM_MODE_NOPES),
m_FlashStatus(0),
m_FlashRAM_Offset(0),
m_ReadOnly(ReadOnly),
m_hFile(NULL)
{
}
CFlashram::~CFlashram()
{
if (m_hFile)
{
CloseHandle(m_hFile);
m_hFile = NULL;
}
}
void CFlashram::DmaFromFlashram(uint8_t * dest, int StartOffset, int len)
{
uint8_t FlipBuffer[0x10000];
uint32_t count;
switch (m_FlashFlag)
{
case FLASHRAM_MODE_READ:
if (m_hFile == NULL)
{
if (!LoadFlashram())
{
return;
}
}
if (len > 0x10000)
{
if (bHaveDebugger())
{
g_Notify->DisplayError(stdstr_f(__FUNCTION__ ": DmaFromFlashram FlipBuffer to small (len: %d)", len).ToUTF16().c_str());
}
len = 0x10000;
}
if ((len & 3) != 0)
{
if (bHaveDebugger())
{
g_Notify->DisplayError(__FUNCTIONW__ L": Unaligned flash ram read ???");
}
return;
}
memset(FlipBuffer, 0, sizeof(FlipBuffer));
StartOffset = StartOffset << 1;
SetFilePointer(m_hFile, StartOffset, NULL, FILE_BEGIN);
DWORD dwRead;
ReadFile(m_hFile, FlipBuffer, len, &dwRead, NULL);
for (count = dwRead; (int)count < len; count++)
{
FlipBuffer[count] = 0xFF;
}
for (count = 0; (int)count < len; count += 4)
{
register uint32_t eax;
eax = *(uint32_t *)&FlipBuffer[count];
// eax = swap32by8(eax); // ; bswap eax
*(uint32_t *)(dest + count) = eax;
}
break;
case FLASHRAM_MODE_STATUS:
if (StartOffset != 0 && len != 8)
{
if (bHaveDebugger())
{
g_Notify->DisplayError(stdstr_f(__FUNCTION__ ": Reading m_FlashStatus not being handled correctly\nStart: %X len: %X", StartOffset, len).ToUTF16().c_str());
}
}
*((uint32_t *)(dest)) = (uint32_t)((m_FlashStatus >> 32) & 0xFFFFFFFF);
*((uint32_t *)(dest)+1) = (uint32_t)(m_FlashStatus & 0xFFFFFFFF);
break;
default:
if (bHaveDebugger())
{
g_Notify->DisplayError(stdstr_f(__FUNCTION__": Start: %X, Offset: %X len: %X", dest - g_MMU->Rdram(), StartOffset, len).ToUTF16().c_str());
}
}
}
void CFlashram::DmaToFlashram(uint8_t * Source, int StartOffset, int len)
{
switch (m_FlashFlag)
{
case FLASHRAM_MODE_WRITE:
m_FlashRamPointer = Source;
break;
default:
if (bHaveDebugger())
{
g_Notify->DisplayError(stdstr_f(__FUNCTION__ ": Start: %X, Offset: %X len: %X", Source - g_MMU->Rdram(), StartOffset, len).ToUTF16().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(__FUNCTION__ ": PAddr (%X)", PAddr).ToUTF16().c_str());
}
break;
}
return (uint32_t)(m_FlashStatus >> 32);
}
bool CFlashram::LoadFlashram()
{
CPath FileName;
FileName.SetDriveDirectory(g_Settings->LoadStringVal(Directory_NativeSave).c_str());
FileName.SetName(g_Settings->LoadStringVal(Game_GameName).c_str());
FileName.SetExtension("fla");
if (!FileName.DirectoryExists())
{
FileName.DirectoryCreate();
}
m_hFile = CreateFile(FileName, m_ReadOnly ? GENERIC_READ : GENERIC_WRITE | GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_ALWAYS,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS, NULL);
if (m_hFile == INVALID_HANDLE_VALUE)
{
WriteTrace(TraceN64System, TraceError, "Failed to open (%s), ReadOnly = %d, LastError = %X", (LPCTSTR)FileName, m_ReadOnly, GetLastError());
g_Notify->DisplayError(GS(MSG_FAIL_OPEN_FLASH));
return false;
}
SetFilePointer(m_hFile, 0, NULL, FILE_BEGIN);
return true;
}
void CFlashram::WriteToFlashCommand(uint32_t FlashRAM_Command)
{
uint8_t EmptyBlock[128];
DWORD dwWritten;
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_hFile == NULL) {
if (!LoadFlashram())
{
return;
}
}
SetFilePointer(m_hFile, m_FlashRAM_Offset, NULL, FILE_BEGIN);
WriteFile(m_hFile, EmptyBlock, 128, &dwWritten, NULL);
break;
case FLASHRAM_MODE_WRITE:
if (m_hFile == NULL) {
if (!LoadFlashram())
{
return;
}
}
{
uint8_t FlipBuffer[128];
register size_t edx;
uint8_t * FlashRamPointer = m_FlashRamPointer;
memset(FlipBuffer, 0, sizeof(FlipBuffer));
for (edx = 0; edx < 128; edx += 4)
{
register uint32_t eax;
eax = *(unsigned __int32 *)&FlashRamPointer[edx];
// eax = swap32by8(eax); // ; bswap eax
*(unsigned __int32 *)(FlipBuffer + edx) = eax;
}
SetFilePointer(m_hFile, m_FlashRAM_Offset, NULL, FILE_BEGIN);
WriteFile(m_hFile, FlipBuffer, 128, &dwWritten, NULL);
}
break;
default:
g_Notify->DisplayError(stdstr_f("Writing %X to flash ram command register\nm_FlashFlag: %d", FlashRAM_Command, m_FlashFlag).ToUTF16().c_str());
}
m_FlashFlag = FLASHRAM_MODE_NOPES;
break;
case 0xE1000000:
m_FlashFlag = FLASHRAM_MODE_STATUS;
m_FlashStatus = 0x1111800100C2001E;
break;
case 0xF0000000:
m_FlashFlag = FLASHRAM_MODE_READ;
m_FlashStatus = 0x11118004F0000000;
break;
case 0x4B000000:
m_FlashRAM_Offset = (FlashRAM_Command & 0xffff) * 128;
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) * 128;
m_FlashStatus = 0x1111800400C2001E;
break;
default:
if (bHaveDebugger())
{
g_Notify->DisplayError(stdstr_f("Writing %X to flash ram command register", FlashRAM_Command).ToUTF16().c_str());
}
}
}