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project64/Source/Project64-core/N64System/Mips/Dma.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 <Common/MemoryManagement.h>
#include <Project64-core/N64System/Mips/Dma.h>
#include <Project64-core/N64System/SystemGlobals.h>
#include <Project64-core/N64System/N64RomClass.h>
#include <Project64-core/N64System/Mips/MemoryVirtualMem.h>
#include <Project64-core/N64System/Mips/RegisterClass.h>
#include <Project64-core/N64System/Mips/Disk.h>
#include <Project64-core/N64System/N64DiskClass.h>
#include <Project64-core/N64System/N64Class.h>
CDMA::CDMA(CFlashram & FlashRam, CSram & Sram) :
m_FlashRam(FlashRam),
m_Sram(Sram)
{
}
void CDMA::OnFirstDMA()
{
int16_t offset;
const uint32_t base = 0x00000000;
const uint32_t rt = g_MMU->RdramSize();
switch (g_Rom->CicChipID())
{
case CIC_NUS_6101: offset = +0x0318; break;
case CIC_NUS_5167: offset = +0x0318; break;
case CIC_NUS_8303: offset = +0x0318; break;
case CIC_UNKNOWN:
case CIC_NUS_6102: offset = +0x0318; break;
case CIC_NUS_6103: offset = +0x0318; break;
case CIC_NUS_6105: offset = +0x03F0; break;
case CIC_NUS_6106: offset = +0x0318; break;
default:
g_Notify->DisplayError(stdstr_f("Unhandled CicChip(%d) in first DMA", g_Rom->CicChipID()).c_str());
return;
}
g_MMU->SW_PAddr(base + offset, rt);
}
void CDMA::PI_DMA_READ()
{
// PI_STATUS_REG |= PI_STATUS_DMA_BUSY;
uint32_t PI_RD_LEN_REG = ((g_Reg->PI_RD_LEN_REG) & 0x00FFFFFFul) + 1;
if ((PI_RD_LEN_REG & 1) != 0)
{
PI_RD_LEN_REG += 1;
}
if (g_Reg->PI_DRAM_ADDR_REG + PI_RD_LEN_REG > g_MMU->RdramSize())
{
if (bHaveDebugger())
{
g_Notify->DisplayError(stdstr_f("PI_DMA_READ not in Memory: %08X", g_Reg->PI_DRAM_ADDR_REG + PI_RD_LEN_REG).c_str());
}
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
return;
}
//64DD Buffers Write
if (g_Reg->PI_CART_ADDR_REG >= 0x05000000 && g_Reg->PI_CART_ADDR_REG <= 0x050003FF)
{
//64DD C2 Sectors (don't care)
g_SystemTimer->SetTimer(g_SystemTimer->DDPiTimer, (PI_RD_LEN_REG * 63) / 25, false);
return;
}
if (g_Reg->PI_CART_ADDR_REG >= 0x05000400 && g_Reg->PI_CART_ADDR_REG <= 0x050004FF)
{
//64DD User Sector
uint32_t i;
uint8_t * RDRAM = g_MMU->Rdram();
uint8_t * DISK = g_Disk->GetDiskAddressBuffer();
for (i = 0; i < PI_RD_LEN_REG; i++)
{
*(DISK + (i ^ 3)) = *(RDRAM + ((g_Reg->PI_DRAM_ADDR_REG + i) ^ 3));
}
g_SystemTimer->SetTimer(g_SystemTimer->DDPiTimer, (PI_RD_LEN_REG * 63) / 25, false);
return;
}
if (g_Reg->PI_CART_ADDR_REG >= 0x05000580 && g_Reg->PI_CART_ADDR_REG <= 0x050005BF)
{
//64DD MSEQ (don't care)
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
return;
}
//Write ROM Area (for 64DD Convert)
if (g_Reg->PI_CART_ADDR_REG >= 0x10000000 && g_Reg->PI_CART_ADDR_REG <= 0x1FBFFFFF && g_Settings->LoadBool(Game_AllowROMWrites))
{
uint32_t i;
uint8_t * ROM = g_Rom->GetRomAddress();
uint8_t * RDRAM = g_MMU->Rdram();
ProtectMemory(ROM, g_Rom->GetRomSize(), MEM_READWRITE);
g_Reg->PI_CART_ADDR_REG -= 0x10000000;
if (g_Reg->PI_CART_ADDR_REG + PI_RD_LEN_REG < g_Rom->GetRomSize())
{
for (i = 0; i < PI_RD_LEN_REG; i++)
{
*(ROM + ((g_Reg->PI_CART_ADDR_REG + i) ^ 3)) = *(RDRAM + ((g_Reg->PI_DRAM_ADDR_REG + i) ^ 3));
}
}
else
{
uint32_t Len;
Len = g_Rom->GetRomSize() - g_Reg->PI_CART_ADDR_REG;
for (i = 0; i < Len; i++)
{
*(ROM + ((g_Reg->PI_CART_ADDR_REG + i) ^ 3)) = *(RDRAM + ((g_Reg->PI_DRAM_ADDR_REG + i) ^ 3));
}
}
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);
}
ProtectMemory(ROM, g_Rom->GetRomSize(), MEM_READONLY);
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,
PI_RD_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.DmaToFlashram(
g_MMU->Rdram() + g_Reg->PI_DRAM_ADDR_REG,
g_Reg->PI_CART_ADDR_REG - 0x08000000,
PI_RD_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)
{
g_Notify->DisplayError(stdstr_f("**** FLashRam DMA Read address %08X *****", g_Reg->PI_CART_ADDR_REG).c_str());
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(stdstr_f("PI_DMA_READ where are you dmaing to ? : %08X", g_Reg->PI_CART_ADDR_REG).c_str());
}
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()
{
uint32_t 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(stdstr_f("PI_DMA_WRITE not in Memory: %08X", g_Reg->PI_DRAM_ADDR_REG + PI_WR_LEN_REG).c_str()); }
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
return;
}
//64DD Buffers Read
if (g_Reg->PI_CART_ADDR_REG >= 0x05000000 && g_Reg->PI_CART_ADDR_REG <= 0x050003FF)
{
//64DD C2 Sectors (just read 0)
uint32_t i;
uint8_t * RDRAM = g_MMU->Rdram();
for (i = 0; i < PI_WR_LEN_REG; i++)
{
*(RDRAM + ((g_Reg->PI_DRAM_ADDR_REG + i) ^ 3)) = 0;
}
//Timer is needed for Track Read
g_SystemTimer->SetTimer(g_SystemTimer->DDPiTimer, (PI_WR_LEN_REG * 63) / 25, false);
return;
}
if (g_Reg->PI_CART_ADDR_REG >= 0x05000400 && g_Reg->PI_CART_ADDR_REG <= 0x050004FF)
{
//64DD User Sector
uint32_t i;
uint8_t * RDRAM = g_MMU->Rdram();
uint8_t * DISK = g_Disk->GetDiskAddressBuffer();
for (i = 0; i < PI_WR_LEN_REG; i++)
{
*(RDRAM + ((g_Reg->PI_DRAM_ADDR_REG + i) ^ 3)) = *(DISK + (i ^ 3));
}
//Timer is needed for Track Read
g_SystemTimer->SetTimer(g_SystemTimer->DDPiTimer, (PI_WR_LEN_REG * 63) / 25, false);
return;
}
if (g_Reg->PI_CART_ADDR_REG >= 0x05000580 && g_Reg->PI_CART_ADDR_REG <= 0x050005BF)
{
//64DD MSEQ (don't care)
g_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
g_Reg->MI_INTR_REG |= MI_INTR_PI;
g_Reg->CheckInterrupts();
return;
}
//64DD IPL ROM
if (g_Reg->PI_CART_ADDR_REG >= 0x06000000 && g_Reg->PI_CART_ADDR_REG <= 0x063FFFFF)
{
uint32_t i;
uint8_t * ROM = g_DDRom->GetRomAddress();
uint8_t * RDRAM = g_MMU->Rdram();
g_Reg->PI_CART_ADDR_REG -= 0x06000000;
if (g_Reg->PI_CART_ADDR_REG + PI_WR_LEN_REG < g_DDRom->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 if (g_Reg->PI_CART_ADDR_REG >= g_DDRom->GetRomSize())
{
uint32_t cart = g_Reg->PI_CART_ADDR_REG - g_DDRom->GetRomSize();
while (cart >= g_DDRom->GetRomSize())
{
cart -= g_DDRom->GetRomSize();
}
for (i = 0; i < PI_WR_LEN_REG; i++)
{
*(RDRAM + ((g_Reg->PI_DRAM_ADDR_REG + i) ^ 3)) = *(ROM + ((cart + i) ^ 3));
}
}
else
{
uint32_t Len;
Len = g_DDRom->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 += 0x06000000;
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,(int32_t)(PI_WR_LEN_REG * 8.9) + 50);
//ChangeTimer(PiTimer,(int32_t)(PI_WR_LEN_REG * 8.9));
return;
}
if (g_Reg->PI_CART_ADDR_REG >= 0x08000000 && g_Reg->PI_CART_ADDR_REG <= 0x08088000)
{
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 <= 0x1FFFFFFF)
{
uint32_t i;
#ifdef legacycode
#ifdef ROM_IN_MAPSPACE
if (WrittenToRom)
{
uint32_t OldProtect;
VirtualProtect(ROM,m_RomFileSize,PAGE_READONLY, &OldProtect);
}
#endif
#endif
uint8_t * ROM = g_Rom->GetRomAddress();
uint8_t * 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 if (g_Reg->PI_CART_ADDR_REG >= g_Rom->GetRomSize())
{
uint32_t cart = g_Reg->PI_CART_ADDR_REG - g_Rom->GetRomSize();
while (cart >= g_Rom->GetRomSize())
{
cart -= g_Rom->GetRomSize();
}
for (i = 0; i < PI_WR_LEN_REG; i++)
{
*(RDRAM + ((g_Reg->PI_DRAM_ADDR_REG + i) ^ 3)) = *(ROM + ((cart + i) ^ 3));
}
}
else
{
uint32_t 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,(int32_t)(PI_WR_LEN_REG * 8.9) + 50);
//ChangeTimer(PiTimer,(int32_t)(PI_WR_LEN_REG * 8.9));
return;
}
if (g_Settings->LoadBool(Debugger_ShowUnhandledMemory))
{
g_Notify->DisplayError(stdstr_f("PI_DMA_WRITE not in ROM: %08X", g_Reg->PI_CART_ADDR_REG).c_str());
}
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()
{
g_Reg->SP_DRAM_ADDR_REG &= 0x1FFFFFFF;
if (g_Reg->SP_DRAM_ADDR_REG > g_MMU->RdramSize())
{
if (bHaveDebugger())
{
g_Notify->DisplayError(stdstr_f("%s\nSP_DRAM_ADDR_REG not in RDRam space : % 08X", __FUNCTION__, g_Reg->SP_DRAM_ADDR_REG).c_str());
}
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(stdstr_f("%s\nCould not fit copy in memory segment",__FUNCTION__).c_str());
}
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()
{
if (g_Reg->SP_DRAM_ADDR_REG > g_MMU->RdramSize())
{
if (bHaveDebugger())
{
g_Notify->DisplayError(stdstr_f("%s\nSP_DRAM_ADDR_REG not in RDRam space : %08X", __FUNCTION__, g_Reg->SP_DRAM_ADDR_REG).c_str());
}
return;
}
if (g_Reg->SP_WR_LEN_REG + 1 + (g_Reg->SP_MEM_ADDR_REG & 0xFFF) > 0x1000)
{
if (bHaveDebugger())
{
g_Notify->DisplayError("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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