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project64/Source/Project64/N64 System/Mips/Dma.cpp

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/****************************************************************************
* *
* Project 64 - 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"
CDMA::CDMA(CFlashram & FlashRam, CSram & Sram) :
m_FlashRam(FlashRam),
m_Sram(Sram)
{
}
void CDMA::OnFirstDMA (void) {
switch (g_Rom->CicChipID()) {
case CIC_NUS_6101: *(DWORD *)&((g_MMU->Rdram())[0x318]) = g_MMU->RdramSize(); break;
case CIC_UNKNOWN:
case CIC_NUS_6102: *(DWORD *)&((g_MMU->Rdram())[0x318]) = g_MMU->RdramSize(); break;
case CIC_NUS_6103: *(DWORD *)&((g_MMU->Rdram())[0x318]) = g_MMU->RdramSize(); break;
case CIC_NUS_6105: *(DWORD *)&((g_MMU->Rdram())[0x3F0]) = g_MMU->RdramSize(); break;
case CIC_NUS_6106: *(DWORD *)&((g_MMU->Rdram())[0x318]) = g_MMU->RdramSize(); break;
default: g_Notify->DisplayError(L"Unhandled CicChip(%d) in first DMA",g_Rom->CicChipID());
}
}
void CDMA::PI_DMA_READ (void) {
// PI_STATUS_REG |= PI_STATUS_DMA_BUSY;
if ( g_Reg->PI_DRAM_ADDR_REG + g_Reg->PI_RD_LEN_REG + 1 > g_MMU->RdramSize())
{
if (bHaveDebugger()) { g_Notify->DisplayError(L"PI_DMA_READ not in Memory"); }
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
return;
}
if ( g_Reg->PI_CART_ADDR_REG >= 0x08000000 && g_Reg->PI_CART_ADDR_REG <= 0x08010000) {
if (g_System->m_SaveUsing == SaveChip_Auto) { g_System->m_SaveUsing = SaveChip_Sram; }
if (g_System->m_SaveUsing == SaveChip_Sram) {
m_Sram.DmaToSram(
g_MMU->Rdram() + g_Reg->PI_DRAM_ADDR_REG,
g_Reg->PI_CART_ADDR_REG - 0x08000000,
g_Reg->PI_RD_LEN_REG + 1
);
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
return;
}
if (g_System->m_SaveUsing == SaveChip_FlashRam) {
m_FlashRam.DmaToFlashram(
g_MMU->Rdram()+g_Reg->PI_DRAM_ADDR_REG,
g_Reg->PI_CART_ADDR_REG - 0x08000000,
g_Reg->PI_RD_LEN_REG + 1
);
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
return;
}
}
if (g_System->m_SaveUsing == SaveChip_FlashRam)
{
g_Notify->DisplayError(L"**** FLashRam DMA Read address %X *****",g_Reg->PI_CART_ADDR_REG);
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
return;
}
if (bHaveDebugger())
{
g_Notify->DisplayError(L"PI_DMA_READ where are you dmaing to ?");
}
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
return;
}
void CDMA::PI_DMA_WRITE (void)
{
DWORD PI_WR_LEN_REG = ((g_Reg->PI_WR_LEN_REG) & 0x00FFFFFFul) + 1;
if ((PI_WR_LEN_REG & 1) != 0)
{
PI_WR_LEN_REG += 1; /* fixes AI Shougi 3, Doraemon 3, etc. */
}
g_Reg->PI_STATUS_REG |= PI_STATUS_DMA_BUSY;
if ( g_Reg->PI_DRAM_ADDR_REG + PI_WR_LEN_REG > g_MMU->RdramSize())
{
if (g_Settings->LoadBool(Debugger_ShowUnhandledMemory)) { g_Notify->DisplayError(L"PI_DMA_WRITE not in Memory"); }
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
return;
}
if ( g_Reg->PI_CART_ADDR_REG >= 0x08000000 && g_Reg->PI_CART_ADDR_REG <= 0x08010000) {
if (g_System->m_SaveUsing == SaveChip_Auto) { g_System->m_SaveUsing = SaveChip_Sram; }
if (g_System->m_SaveUsing == SaveChip_Sram) {
m_Sram.DmaFromSram(
g_MMU->Rdram()+g_Reg->PI_DRAM_ADDR_REG,
g_Reg->PI_CART_ADDR_REG - 0x08000000,
PI_WR_LEN_REG
);
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
return;
}
if (g_System->m_SaveUsing == SaveChip_FlashRam) {
m_FlashRam.DmaFromFlashram(
g_MMU->Rdram()+g_Reg->PI_DRAM_ADDR_REG,
g_Reg->PI_CART_ADDR_REG - 0x08000000,
PI_WR_LEN_REG
);
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
}
return;
}
if ( g_Reg->PI_CART_ADDR_REG >= 0x10000000 && g_Reg->PI_CART_ADDR_REG <= 0x1FBFFFFF)
{
DWORD i;
#ifdef tofix
#ifdef ROM_IN_MAPSPACE
if (WrittenToRom) {
DWORD OldProtect;
VirtualProtect(ROM,m_RomFileSize,PAGE_READONLY, &OldProtect);
}
#endif
#endif
BYTE * ROM = g_Rom->GetRomAddress();
BYTE * RDRAM = g_MMU->Rdram();
g_Reg->PI_CART_ADDR_REG -= 0x10000000;
if (g_Reg->PI_CART_ADDR_REG + PI_WR_LEN_REG < g_Rom->GetRomSize()) {
for (i = 0; i < PI_WR_LEN_REG; i ++) {
*(RDRAM+((g_Reg->PI_DRAM_ADDR_REG + i) ^ 3)) = *(ROM+((g_Reg->PI_CART_ADDR_REG + i) ^ 3));
}
} else {
DWORD Len;
Len = g_Rom->GetRomSize() - g_Reg->PI_CART_ADDR_REG;
for (i = 0; i < Len; i ++) {
*(RDRAM+((g_Reg->PI_DRAM_ADDR_REG + i) ^ 3)) = *(ROM+((g_Reg->PI_CART_ADDR_REG + i) ^ 3));
}
for (i = Len; i < PI_WR_LEN_REG - Len; i ++) {
*(RDRAM+((g_Reg->PI_DRAM_ADDR_REG + i) ^ 3)) = 0;
}
}
g_Reg->PI_CART_ADDR_REG += 0x10000000;
if (!g_System->DmaUsed())
{
g_System->SetDmaUsed(true);
OnFirstDMA();
}
if (g_Recompiler && g_System->bSMM_PIDMA())
{
g_Recompiler->ClearRecompCode_Phys(g_Reg->PI_DRAM_ADDR_REG, g_Reg->PI_WR_LEN_REG,CRecompiler::Remove_DMA);
}
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
//ChangeTimer(PiTimer,(int)(PI_WR_LEN_REG * 8.9) + 50);
//ChangeTimer(PiTimer,(int)(PI_WR_LEN_REG * 8.9));
return;
}
if (g_Settings->LoadBool(Debugger_ShowUnhandledMemory)) { g_Notify->DisplayError(L"PI_DMA_WRITE not in ROM"); }
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
}
void CDMA::SP_DMA_READ (void) {
g_Reg->SP_DRAM_ADDR_REG &= 0x1FFFFFFF;
if (g_Reg->SP_DRAM_ADDR_REG > g_MMU->RdramSize())
{
if (bHaveDebugger())
{
g_Notify->DisplayError(__FUNCTIONW__ L"\nSP_DRAM_ADDR_REG not in RDRam space");
}
g_Reg->SP_DMA_BUSY_REG = 0;
g_Reg->SP_STATUS_REG &= ~SP_STATUS_DMA_BUSY;
return;
}
if (g_Reg->SP_RD_LEN_REG + 1 + (g_Reg->SP_MEM_ADDR_REG & 0xFFF) > 0x1000)
{
if (bHaveDebugger())
{
g_Notify->DisplayError(__FUNCTIONW__ L"\ncould not fit copy in memory segement");
}
return;
}
if ((g_Reg->SP_MEM_ADDR_REG & 3) != 0) { g_Notify->BreakPoint(__FILE__,__LINE__); }
if ((g_Reg->SP_DRAM_ADDR_REG & 3) != 0) { g_Notify->BreakPoint(__FILE__,__LINE__); }
if (((g_Reg->SP_RD_LEN_REG + 1) & 3) != 0) { g_Notify->BreakPoint(__FILE__,__LINE__); }
memcpy( g_MMU->Dmem() + (g_Reg->SP_MEM_ADDR_REG & 0x1FFF), g_MMU->Rdram() + g_Reg->SP_DRAM_ADDR_REG,
g_Reg->SP_RD_LEN_REG + 1 );
g_Reg->SP_DMA_BUSY_REG = 0;
g_Reg->SP_STATUS_REG &= ~SP_STATUS_DMA_BUSY;
}
void CDMA::SP_DMA_WRITE (void)
{
if (g_Reg->SP_DRAM_ADDR_REG > g_MMU->RdramSize())
{
if (bHaveDebugger())
{
g_Notify->DisplayError(L"SP DMA WRITE\nSP_DRAM_ADDR_REG not in RDRam space");
}
return;
}
if (g_Reg->SP_WR_LEN_REG + 1 + (g_Reg->SP_MEM_ADDR_REG & 0xFFF) > 0x1000)
{
if (bHaveDebugger())
{
g_Notify->DisplayError(L"SP DMA WRITE\ncould not fit copy in memory segement");
}
return;
}
if ((g_Reg->SP_MEM_ADDR_REG & 3) != 0) { g_Notify->BreakPoint(__FILE__,__LINE__); }
if ((g_Reg->SP_DRAM_ADDR_REG & 3) != 0) { g_Notify->BreakPoint(__FILE__,__LINE__); }
if (((g_Reg->SP_WR_LEN_REG + 1) & 3) != 0) { g_Notify->BreakPoint(__FILE__,__LINE__); }
memcpy( g_MMU->Rdram() + g_Reg->SP_DRAM_ADDR_REG, g_MMU->Dmem() + (g_Reg->SP_MEM_ADDR_REG & 0x1FFF),
g_Reg->SP_WR_LEN_REG + 1);
g_Reg->SP_DMA_BUSY_REG = 0;
g_Reg->SP_STATUS_REG &= ~SP_STATUS_DMA_BUSY;
}
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