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project64/Source/Project64/N64 System/C Core/Dma.cpp

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/*
* Project 64 - A Nintendo 64 emulator.
*
* (c) Copyright 2001 zilmar (zilmar@emulation64.com) and
* Jabo (jabo@emulation64.com).
*
* pj64 homepage: www.pj64.net
*
* Permission to use, copy, modify and distribute Project64 in both binary and
* source form, for non-commercial purposes, is hereby granted without fee,
* providing that this license information and copyright notice appear with
* all copies and any derived work.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event shall the authors be held liable for any damages
* arising from the use of this software.
*
* Project64 is freeware for PERSONAL USE only. Commercial users should
* seek permission of the copyright holders first. Commercial use includes
* charging money for Project64 or software derived from Project64.
*
* The copyright holders request that bug fixes and improvements to the code
* should be forwarded to them so if they want them.
*
*/
#include <Windows.h>
#include <stdio.h>
#include "main.h"
#include "debugger.h"
#include "CPU.h"
void OnFirstDMA (void) {
switch (CicChip) {
case 1: *(DWORD *)&((_MMU->Rdram())[0x318]) = RdramSize; break;
case 2: *(DWORD *)&((_MMU->Rdram())[0x318]) = RdramSize; break;
case 3: *(DWORD *)&((_MMU->Rdram())[0x318]) = RdramSize; break;
case 5: *(DWORD *)&((_MMU->Rdram())[0x3F0]) = RdramSize; break;
case 6: *(DWORD *)&((_MMU->Rdram())[0x318]) = RdramSize; break;
default: DisplayError("Unhandled CicChip(%d) in first DMA",CicChip);
}
}
void PI_DMA_READ (void) {
// PI_STATUS_REG |= PI_STATUS_DMA_BUSY;
if ( _Reg->PI_DRAM_ADDR_REG + _Reg->PI_RD_LEN_REG + 1 > RdramSize) {
#ifndef EXTERNAL_RELEASE
DisplayError("PI_DMA_READ not in Memory");
#endif
_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
_Reg->MI_INTR_REG |= MI_INTR_PI;
CheckInterrupts();
return;
}
if ( _Reg->PI_CART_ADDR_REG >= 0x08000000 && _Reg->PI_CART_ADDR_REG <= 0x08010000) {
if (SaveUsing == SaveChip_Auto) { SaveUsing = SaveChip_Sram; }
if (SaveUsing == SaveChip_Sram) {
DmaToSram(
_MMU->Rdram() + _Reg->PI_DRAM_ADDR_REG,
_Reg->PI_CART_ADDR_REG - 0x08000000,
_Reg->PI_RD_LEN_REG + 1
);
_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
_Reg->MI_INTR_REG |= MI_INTR_PI;
CheckInterrupts();
return;
}
if (SaveUsing == SaveChip_FlashRam) {
DmaToFlashram(
_MMU->Rdram()+_Reg->PI_DRAM_ADDR_REG,
_Reg->PI_CART_ADDR_REG - 0x08000000,
_Reg->PI_WR_LEN_REG + 1
);
_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
_Reg->MI_INTR_REG |= MI_INTR_PI;
CheckInterrupts();
return;
}
}
if (SaveUsing == SaveChip_FlashRam) {
#ifndef EXTERNAL_RELEASE
DisplayError("**** FLashRam DMA Read address %X *****",_Reg->PI_CART_ADDR_REG);
#endif
_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
_Reg->MI_INTR_REG |= MI_INTR_PI;
CheckInterrupts();
return;
}
#ifndef EXTERNAL_RELEASE
DisplayError("PI_DMA_READ where are you dmaing to ?");
#endif
_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
_Reg->MI_INTR_REG |= MI_INTR_PI;
CheckInterrupts();
return;
}
void PI_DMA_WRITE (void) {
_Reg->PI_STATUS_REG |= PI_STATUS_DMA_BUSY;
if ( _Reg->PI_DRAM_ADDR_REG + _Reg->PI_WR_LEN_REG + 1 > RdramSize)
{
if (ShowUnhandledMemory) { DisplayError("PI_DMA_WRITE not in Memory"); }
_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
_Reg->MI_INTR_REG |= MI_INTR_PI;
CheckInterrupts();
return;
}
if ( _Reg->PI_CART_ADDR_REG >= 0x08000000 && _Reg->PI_CART_ADDR_REG <= 0x08010000) {
if (SaveUsing == SaveChip_Auto) { SaveUsing = SaveChip_Sram; }
if (SaveUsing == SaveChip_Sram) {
DmaFromSram(
_MMU->Rdram()+_Reg->PI_DRAM_ADDR_REG,
_Reg->PI_CART_ADDR_REG - 0x08000000,
_Reg->PI_WR_LEN_REG + 1
);
_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
_Reg->MI_INTR_REG |= MI_INTR_PI;
CheckInterrupts();
return;
}
if (SaveUsing == SaveChip_FlashRam) {
DmaFromFlashram(
_MMU->Rdram()+_Reg->PI_DRAM_ADDR_REG,
_Reg->PI_CART_ADDR_REG - 0x08000000,
_Reg->PI_WR_LEN_REG + 1
);
_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
_Reg->MI_INTR_REG |= MI_INTR_PI;
CheckInterrupts();
}
return;
}
if ( _Reg->PI_CART_ADDR_REG >= 0x10000000 && _Reg->PI_CART_ADDR_REG <= 0x1FBFFFFF) {
DWORD i;
#ifdef tofix
#ifdef ROM_IN_MAPSPACE
if (WrittenToRom) {
DWORD OldProtect;
VirtualProtect(ROM,RomFileSize,PAGE_READONLY, &OldProtect);
}
#endif
#endif
BYTE * ROM = _Rom->GetRomAddress();
BYTE * RDRAM = _MMU->Rdram();
_Reg->PI_CART_ADDR_REG -= 0x10000000;
if (_Reg->PI_CART_ADDR_REG + _Reg->PI_WR_LEN_REG + 1 < RomFileSize) {
for (i = 0; i < _Reg->PI_WR_LEN_REG + 1; i ++) {
*(RDRAM+((_Reg->PI_DRAM_ADDR_REG + i) ^ 3)) = *(ROM+((_Reg->PI_CART_ADDR_REG + i) ^ 3));
}
} else {
DWORD Len;
Len = RomFileSize - _Reg->PI_CART_ADDR_REG;
for (i = 0; i < Len; i ++) {
*(RDRAM+((_Reg->PI_DRAM_ADDR_REG + i) ^ 3)) = *(ROM+((_Reg->PI_CART_ADDR_REG + i) ^ 3));
}
for (i = Len; i < _Reg->PI_WR_LEN_REG + 1 - Len; i ++) {
*(RDRAM+((_Reg->PI_DRAM_ADDR_REG + i) ^ 3)) = 0;
}
}
_Reg->PI_CART_ADDR_REG += 0x10000000;
if (!CPU_Action.DMAUsed) {
CPU_Action.DMAUsed = TRUE;
OnFirstDMA();
}
if (_Recompiler && _Recompiler->bSMM_PIDMA())
{
_Recompiler->ClearRecompCode_Phys(_Reg->PI_DRAM_ADDR_REG, _Reg->PI_WR_LEN_REG,CRecompiler::Remove_DMA);
}
_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
_Reg->MI_INTR_REG |= MI_INTR_PI;
CheckInterrupts();
//ChangeTimer(PiTimer,(int)(PI_WR_LEN_REG * 8.9) + 50);
//ChangeTimer(PiTimer,(int)(PI_WR_LEN_REG * 8.9));
return;
}
if (ShowUnhandledMemory) { DisplayError("PI_DMA_WRITE not in ROM"); }
_Reg->PI_STATUS_REG &= ~PI_STATUS_DMA_BUSY;
_Reg->MI_INTR_REG |= MI_INTR_PI;
CheckInterrupts();
}
void SI_DMA_READ (void) {
BYTE * PIF_Ram = _MMU->PifRam();
BYTE * PifRamPos = _MMU->PifRam();
BYTE * RDRAM = _MMU->Rdram();
if ((int)_Reg->SI_DRAM_ADDR_REG > (int)RdramSize) {
#ifndef EXTERNAL_RELEASE
DisplayError("SI DMA\nSI_DRAM_ADDR_REG not in RDRam space");
#endif
return;
}
PifRamRead();
_Reg->SI_DRAM_ADDR_REG &= 0xFFFFFFF8;
if ((int)_Reg->SI_DRAM_ADDR_REG < 0) {
int count, RdramPos;
RdramPos = (int)_Reg->SI_DRAM_ADDR_REG;
for (count = 0; count < 0x40; count++, RdramPos++) {
if (RdramPos < 0) { continue; }
RDRAM[RdramPos ^3] = PIF_Ram[count];
}
} else {
_asm {
mov edi, dword ptr [_RegSI]
mov edi, dword ptr [edi]
add edi, RDRAM
mov ecx, PifRamPos
mov edx, 0
memcpyloop:
mov eax, dword ptr [ecx + edx]
bswap eax
mov dword ptr [edi + edx],eax
mov eax, dword ptr [ecx + edx + 4]
bswap eax
mov dword ptr [edi + edx + 4],eax
mov eax, dword ptr [ecx + edx + 8]
bswap eax
mov dword ptr [edi + edx + 8],eax
mov eax, dword ptr [ecx + edx + 12]
bswap eax
mov dword ptr [edi + edx + 12],eax
add edx, 16
cmp edx, 64
jb memcpyloop
}
}
#if (!defined(EXTERNAL_RELEASE))
if (LogOptions.LogPRDMAMemStores) {
int 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) {
sprintf(HexData,"\0");
sprintf(AsciiData,"\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);
}
sprintf(Addon,"%c%c%c%c",
PIF_Ram[(count << 2) + 0], PIF_Ram[(count << 2) + 1],
PIF_Ram[(count << 2) + 2], PIF_Ram[(count << 2) + 3] );
strcat(AsciiData,Addon);
if (((count + 1) % 4) == 0) {
LogMessage("\t%s %s",HexData, AsciiData);
}
}
LogMessage("");
}
#endif
if (DelaySI) {
_SystemTimer->SetTimer(CSystemTimer::SiTimer,0x900,false);
} else {
_Reg->MI_INTR_REG |= MI_INTR_SI;
_Reg->SI_STATUS_REG |= SI_STATUS_INTERRUPT;
CheckInterrupts();
}
}
void SI_DMA_WRITE (void) {
BYTE * PIF_Ram = _MMU->PifRam();
BYTE * PifRamPos = PIF_Ram;
if ((int)_Reg->SI_DRAM_ADDR_REG > (int)RdramSize) {
#ifndef EXTERNAL_RELEASE
DisplayError("SI DMA\nSI_DRAM_ADDR_REG not in RDRam space");
#endif
return;
}
_Reg->SI_DRAM_ADDR_REG &= 0xFFFFFFF8;
BYTE * RDRAM = _MMU->Rdram();
if ((int)_Reg->SI_DRAM_ADDR_REG < 0) {
int count, RdramPos;
RdramPos = (int)_Reg->SI_DRAM_ADDR_REG;
for (count = 0; count < 0x40; count++, RdramPos++) {
if (RdramPos < 0) { PIF_Ram[count] = 0; continue; }
PIF_Ram[count] = RDRAM[RdramPos ^3];
}
} else {
_asm {
mov ecx, dword ptr [_RegSI]
mov ecx, dword ptr [ecx]
add ecx, RDRAM
mov edi, PifRamPos
mov edx, 0
memcpyloop:
mov eax, dword ptr [ecx + edx]
bswap eax
mov dword ptr [edi + edx],eax
mov eax, dword ptr [ecx + edx + 4]
bswap eax
mov dword ptr [edi + edx + 4],eax
mov eax, dword ptr [ecx + edx + 8]
bswap eax
mov dword ptr [edi + edx + 8],eax
mov eax, dword ptr [ecx + edx + 12]
bswap eax
mov dword ptr [edi + edx + 12],eax
add edx, 16
cmp edx, 64
jb memcpyloop
}
}
#if (!defined(EXTERNAL_RELEASE))
if (LogOptions.LogPRDMAMemLoads) {
int 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) {
sprintf(HexData,"\0");
sprintf(AsciiData,"\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);
}
sprintf(Addon,"%c%c%c%c",
PIF_Ram[(count << 2) + 0], PIF_Ram[(count << 2) + 1],
PIF_Ram[(count << 2) + 2], PIF_Ram[(count << 2) + 3] );
strcat(AsciiData,Addon);
if (((count + 1) % 4) == 0) {
LogMessage("\t%s %s",HexData, AsciiData);
}
}
LogMessage("");
}
#endif
PifRamWrite();
if (DelaySI) {
_SystemTimer->SetTimer(CSystemTimer::SiTimer,0x900,false);
} else {
_Reg->MI_INTR_REG |= MI_INTR_SI;
_Reg->SI_STATUS_REG |= SI_STATUS_INTERRUPT;
CheckInterrupts();
}
}
void SP_DMA_READ (void) {
_Reg->SP_DRAM_ADDR_REG &= 0x1FFFFFFF;
if (_Reg->SP_DRAM_ADDR_REG > RdramSize) {
#ifndef EXTERNAL_RELEASE
DisplayError("SP DMA\nSP_DRAM_ADDR_REG not in RDRam space");
#endif
_Reg->SP_DMA_BUSY_REG = 0;
_Reg->SP_STATUS_REG &= ~SP_STATUS_DMA_BUSY;
return;
}
if (_Reg->SP_RD_LEN_REG + 1 + (_Reg->SP_MEM_ADDR_REG & 0xFFF) > 0x1000) {
#ifndef EXTERNAL_RELEASE
DisplayError("SP DMA\ncould not fit copy in memory segement");
#endif
return;
}
if ((_Reg->SP_MEM_ADDR_REG & 3) != 0) { BreakPoint(__FILE__,__LINE__); }
if ((_Reg->SP_DRAM_ADDR_REG & 3) != 0) { BreakPoint(__FILE__,__LINE__); }
if (((_Reg->SP_RD_LEN_REG + 1) & 3) != 0) { BreakPoint(__FILE__,__LINE__); }
memcpy( _MMU->Dmem() + (_Reg->SP_MEM_ADDR_REG & 0x1FFF), _MMU->Rdram() + _Reg->SP_DRAM_ADDR_REG,
_Reg->SP_RD_LEN_REG + 1 );
_Reg->SP_DMA_BUSY_REG = 0;
_Reg->SP_STATUS_REG &= ~SP_STATUS_DMA_BUSY;
}
void SP_DMA_WRITE (void) {
if (_Reg->SP_DRAM_ADDR_REG > RdramSize) {
#ifndef EXTERNAL_RELEASE
DisplayError("SP DMA WRITE\nSP_DRAM_ADDR_REG not in RDRam space");
#endif
return;
}
if (_Reg->SP_WR_LEN_REG + 1 + (_Reg->SP_MEM_ADDR_REG & 0xFFF) > 0x1000) {
#ifndef EXTERNAL_RELEASE
DisplayError("SP DMA WRITE\ncould not fit copy in memory segement");
#endif
return;
}
if ((_Reg->SP_MEM_ADDR_REG & 3) != 0) { BreakPoint(__FILE__,__LINE__); }
if ((_Reg->SP_DRAM_ADDR_REG & 3) != 0) { BreakPoint(__FILE__,__LINE__); }
if (((_Reg->SP_WR_LEN_REG + 1) & 3) != 0) { BreakPoint(__FILE__,__LINE__); }
memcpy( _MMU->Rdram() + _Reg->SP_DRAM_ADDR_REG, _MMU->Dmem() + (_Reg->SP_MEM_ADDR_REG & 0x1FFF),
_Reg->SP_WR_LEN_REG + 1);
_Reg->SP_DMA_BUSY_REG = 0;
_Reg->SP_STATUS_REG &= ~SP_STATUS_DMA_BUSY;
}
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