175 lines
5.3 KiB
C
175 lines
5.3 KiB
C
/***************************************************************************
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dma.c - description
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-------------------
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begin : Wed May 15 2002
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copyright : (C) 2002 by Pete Bernert
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email : BlackDove@addcom.de
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. See also the license.txt file for *
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* additional informations. *
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* *
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***************************************************************************/
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//*************************************************************************//
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// History of changes:
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//
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// 2004/04/04 - Pete
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// - changed plugin to emulate PS2 spu
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//
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// 2002/05/15 - Pete
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// - generic cleanup for the Peops release
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//
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//*************************************************************************//
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#include "../peops2/stdafx.h"
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#define _IN_DMA
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#include "../peops2/externals.h"
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#include "../peops2/registers.h"
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//#include "debug.h"
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extern uint32 psx_ram[(2*1024*1024)/4];
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////////////////////////////////////////////////////////////////////////
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// READ DMA (many values)
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////////////////////////////////////////////////////////////////////////
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EXPORT_GCC void CALLBACK SPU2readDMA4Mem(u32 usPSXMem,int iSize)
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{
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int i;
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u16 *ram16 = (u16 *)&psx_ram[0];
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for(i=0;i<iSize;i++)
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{
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ram16[usPSXMem>>1]=spuMem[spuAddr2[0]]; // spu addr 0 got by writeregister
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usPSXMem+=2;
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spuAddr2[0]++; // inc spu addr
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if(spuAddr2[0]>0xfffff) spuAddr2[0]=0; // wrap
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}
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spuAddr2[0]+=0x20; //?????
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iSpuAsyncWait=0;
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// got from J.F. and Kanodin... is it needed?
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regArea[(PS2_C0_ADMAS)>>1]=0; // Auto DMA complete
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spuStat2[0]=0x80; // DMA complete
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}
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EXPORT_GCC void CALLBACK SPU2readDMA7Mem(u32 usPSXMem,int iSize)
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{
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int i;
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u16 *ram16 = (u16 *)&psx_ram[0];
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for(i=0;i<iSize;i++)
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{
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ram16[usPSXMem>>1]=spuMem[spuAddr2[1]]; // spu addr 1 got by writeregister
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usPSXMem+=2;
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spuAddr2[1]++; // inc spu addr
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if(spuAddr2[1]>0xfffff) spuAddr2[1]=0; // wrap
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}
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spuAddr2[1]+=0x20; //?????
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iSpuAsyncWait=0;
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// got from J.F. and Kanodin... is it needed?
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regArea[(PS2_C1_ADMAS)>>1]=0; // Auto DMA complete
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spuStat2[1]=0x80; // DMA complete
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}
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////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////
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// to investigate: do sound data updates by writedma affect spu
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// irqs? Will an irq be triggered, if new data is written to
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// the memory irq address?
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////////////////////////////////////////////////////////////////////////
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// WRITE DMA (many values)
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////////////////////////////////////////////////////////////////////////
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EXPORT_GCC void CALLBACK SPU2writeDMA4Mem(u32 usPSXMem,int iSize)
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{
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int i;
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u16 *ram16 = (u16 *)&psx_ram[0];
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for(i=0;i<iSize;i++)
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{
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spuMem[spuAddr2[0]] = ram16[usPSXMem>>1]; // spu addr 0 got by writeregister
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usPSXMem+=2;
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spuAddr2[0]++; // inc spu addr
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if(spuAddr2[0]>0xfffff) spuAddr2[0]=0; // wrap
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}
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iSpuAsyncWait=0;
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// got from J.F. and Kanodin... is it needed?
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spuStat2[0]=0x80; // DMA complete
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}
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EXPORT_GCC void CALLBACK SPU2writeDMA7Mem(u32 usPSXMem,int iSize)
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{
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int i;
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u16 *ram16 = (u16 *)&psx_ram[0];
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for(i=0;i<iSize;i++)
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{
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spuMem[spuAddr2[1]] = ram16[usPSXMem>>1]; // spu addr 1 got by writeregister
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spuAddr2[1]++; // inc spu addr
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if(spuAddr2[1]>0xfffff) spuAddr2[1]=0; // wrap
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}
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iSpuAsyncWait=0;
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// got from J.F. and Kanodin... is it needed?
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spuStat2[1]=0x80; // DMA complete
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}
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////////////////////////////////////////////////////////////////////////
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// INTERRUPTS
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////////////////////////////////////////////////////////////////////////
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void InterruptDMA4(void)
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{
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// taken from linuzappz NULL spu2
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// spu2Rs16(CORE0_ATTR)&= ~0x30;
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// spu2Rs16(REG__1B0) = 0;
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// spu2Rs16(SPU2_STATX_WRDY_M)|= 0x80;
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spuCtrl2[0]&=~0x30;
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regArea[(PS2_C0_ADMAS)>>1]=0;
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spuStat2[0]|=0x80;
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}
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EXPORT_GCC void CALLBACK SPU2interruptDMA4(void)
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{
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InterruptDMA4();
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}
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void InterruptDMA7(void)
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{
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// taken from linuzappz NULL spu2
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// spu2Rs16(CORE1_ATTR)&= ~0x30;
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// spu2Rs16(REG__5B0) = 0;
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// spu2Rs16(SPU2_STATX_DREQ)|= 0x80;
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spuCtrl2[1]&=~0x30;
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regArea[(PS2_C1_ADMAS)>>1]=0;
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spuStat2[1]|=0x80;
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}
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EXPORT_GCC void CALLBACK SPU2interruptDMA7(void)
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{
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InterruptDMA7();
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}
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