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PsxDma.c

/*  Pcsx - Pc Psx Emulator
 *  Copyright (C) 1999-2003  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "PsxCommon.h"

// Dma0/1 in Mdec.c
// Dma3   in CdRom.c

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 *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
#endif
                  ptr = (u16 *)PSXM(madr);
                  if (ptr == NULL) {
#ifdef CPU_LOG
                        CPU_LOG("*** DMA4 SPU - mem2spu *** NULL Pointer!!!\n");
#endif
                        break;
                  }
                  SPU_writeDMAMem(ptr, (bcr >> 16) * (bcr & 0xffff) * 2);
                  break;

            case 0x01000200: //spu to cpu transfer
#ifdef PSXDMA_LOG
                  PSXDMA_LOG("*** DMA4 SPU - spu2mem *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
#endif
                  ptr = (u16 *)PSXM(madr);
                  if (ptr == NULL) {
#ifdef CPU_LOG
                        CPU_LOG("*** DMA4 SPU - spu2mem *** NULL Pointer!!!\n");
#endif
                        break;
                  }
                  size = (bcr >> 16) * (bcr & 0xffff) * 2;
            SPU_readDMAMem(ptr, size);
                  psxCpu->Clear(madr, size);
                  break;

#ifdef PSXDMA_LOG
            default:
                  PSXDMA_LOG("*** DMA4 SPU - unknown *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
                  break;
#endif
      }

      HW_DMA4_CHCR &= ~0x01000000;
      DMA_INTERRUPT(4);
}

void psxDma2(u32 madr, u32 bcr, u32 chcr) { // GPU
      u32 *ptr;
      u32 size;

      switch(chcr) {
            case 0x01000200: // vram2mem
#ifdef PSXDMA_LOG
                  PSXDMA_LOG("*** DMA2 GPU - vram2mem *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
#endif
                  ptr = (u32 *)PSXM(madr);
                  if (ptr == NULL) {
#ifdef CPU_LOG
                        CPU_LOG("*** DMA2 GPU - vram2mem *** NULL Pointer!!!\n");
#endif
                        break;
                  }
                  size = (bcr >> 16) * (bcr & 0xffff);
                  GPU_readDataMem(ptr, size);
                  psxCpu->Clear(madr, size);
                  break;

            case 0x01000201: // mem2vram
#ifdef PSXDMA_LOG
                  PSXDMA_LOG("*** DMA 2 - GPU mem2vram *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
#endif
                  ptr = (u32 *)PSXM(madr);
                  if (ptr == NULL) {
#ifdef CPU_LOG
                        CPU_LOG("*** DMA2 GPU - mem2vram *** NULL Pointer!!!\n");
#endif
                        break;
                  }
                  size = (bcr >> 16) * (bcr & 0xffff);
                  GPU_writeDataMem(ptr, size);
                  GPUDMA_INT((size / 4) / BIAS);
                  return;
//                break;

            case 0x01000401: // dma chain
#ifdef PSXDMA_LOG
                  PSXDMA_LOG("*** DMA 2 - GPU dma chain *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
#endif
                  GPU_dmaChain((u32 *)psxM, madr & 0x1fffff);
                  break;

#ifdef PSXDMA_LOG
            default:
                  PSXDMA_LOG("*** DMA 2 - GPU unknown *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
                  break;
#endif
      }

      HW_DMA2_CHCR &= ~0x01000000;
      DMA_INTERRUPT(2);
}

void gpuInterrupt() {
      HW_DMA2_CHCR &= ~0x01000000;
      DMA_INTERRUPT(2);
}

void psxDma6(u32 madr, u32 bcr, u32 chcr) {
      u32 *mem = (u32 *)PSXM(madr);

#ifdef PSXDMA_LOG
      PSXDMA_LOG("*** DMA6 OT *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
#endif

      if (chcr == 0x11000002) {
            if (mem == NULL) {
#ifdef CPU_LOG
                  CPU_LOG("*** DMA6 OT *** NULL Pointer!!!\n");
#endif
                  HW_DMA6_CHCR &= ~0x01000000;
                  DMA_INTERRUPT(6);
                  return;
            }

            while (bcr--) {
                  *mem-- = (madr - 4) & 0xffffff;
                  madr -= 4;
            }
            mem++; *mem = 0xffffff;
      }
#ifdef PSXDMA_LOG
      else {
            // Unknown option
            PSXDMA_LOG("*** DMA6 OT - unknown *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
      }
#endif

      HW_DMA6_CHCR &= ~0x01000000;
      DMA_INTERRUPT(6);
}


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