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/***************************************************************************
* Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
***************************************************************************/
/*
* Handles PSX DMA functions.
*/
#include "psxdma.h"
// Dma0/1 in Mdec.c
// Dma3 in CdRom.c
void spuInterrupt() {
HW_DMA4_CHCR &= SWAP32(~0x01000000);
DMA_INTERRUPT(4);
}
void psxDma4(u32 madr, u32 bcr, u32 chcr) { // SPU
u16 *ptr;
u32 size;
switch (chcr) {
case 0x01000201: //cpu to spu transfer
#ifdef PSXDMA_LOG
PSXDMA_LOG("*** DMA4 SPU - mem2spu *** %x addr = %x size = %x\n", chcr, madr, bcr);
#endif
ptr = (u16 *)PSXM(madr);
if (ptr == NULL) {
#ifdef PSXDMA_LOG
PSXDMA_LOG("*** DMA4 SPU - mem2spu *** NULL Pointer!!!\n");
#endif
break;
}
SPU_writeDMAMem(ptr, (bcr >> 16) * (bcr & 0xffff) * 2);
// Jungle Book - max 0.333x DMA length
// Harry Potter and the Philosopher's Stone - max 0.5x DMA length
//u32 dmalen=64 + ((bcr >> 18) * (bcr & 0xffff)); // less linear to DMA length which should work with both games above?
SPUDMA_INT((bcr >> 16) * (bcr & 0xffff) / 2);
return;
case 0x01000200: //spu to cpu transfer
#ifdef PSXDMA_LOG
PSXDMA_LOG("*** DMA4 SPU - spu2mem *** %x addr = %x size = %x\n", chcr, madr, bcr);
#endif
ptr = (u16 *)PSXM(madr);
if (ptr == NULL) {
#ifdef PSXDMA_LOG
PSXDMA_LOG("*** DMA4 SPU - spu2mem *** NULL Pointer!!!\n");
#endif
break;
}
size = (bcr >> 16) * (bcr & 0xffff) * 2;
SPU_readDMAMem(ptr, size);
#ifdef PSXREC
psxCpu->Clear(madr, size);
#endif
#if 1
SPUDMA_INT((bcr >> 16) * (bcr & 0xffff) / 2);
#else
// Experimental burst dma transfer (0.333x max)
SPUDMA_INT((bcr >> 16) * (bcr & 0xffff) / 3);
#endif
return;
#ifdef PSXDMA_LOG
default:
PSXDMA_LOG("*** DMA4 SPU - unknown *** %x addr = %x size = %x\n", chcr, madr, bcr);
break;
#endif
}
HW_DMA4_CHCR &= SWAP32(~0x01000000);
DMA_INTERRUPT(4);
}
void psxDma6(u32 madr, u32 bcr, u32 chcr) {
u32 size;
u32 *mem = (u32 *)PSXM(madr);
#ifdef PSXDMA_LOG
PSXDMA_LOG("*** DMA6 OT *** %x addr = %x size = %x\n", chcr, madr, bcr);
#endif
if (chcr == 0x11000002) {
if (mem == NULL) {
#ifdef PSXDMA_LOG
PSXDMA_LOG("*** DMA6 OT *** NULL Pointer!!!\n");
#endif
HW_DMA6_CHCR &= SWAP32(~0x01000000);
DMA_INTERRUPT(6);
return;
}
// already 32-bit size
size = bcr;
while (bcr--) {
*mem-- = SWAP32((madr - 4) & 0xffffff);
madr -= 4;
}
mem++; *mem = 0xffffff;
#if 1
GPUOTCDMA_INT( size );
#else
// Experimental burst dma transfer (0.333x max)
GPUOTCDMA_INT( size/3 );
#endif
return;
}
#ifdef PSXDMA_LOG
else {
// Unknown option
PSXDMA_LOG("*** DMA6 OT - unknown *** %x addr = %x size = %x\n", chcr, madr, bcr);
}
#endif
HW_DMA6_CHCR &= SWAP32(~0x01000000);
DMA_INTERRUPT(6);
}
void gpuotcInterrupt()
{
HW_DMA6_CHCR &= SWAP32(~0x01000000);
DMA_INTERRUPT(6);
}
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