libpcsxcore/psxdma.c

   1 /***************************************************************************
   2  *   Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team              *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA.           *
  18  ***************************************************************************/
  19
  20 /*
  21 * Handles PSX DMA functions.
  22 */
  23
  24 #include "psxdma.h"
  25
  26 // Dma0/1 in Mdec.c
  27 // Dma3   in CdRom.c
  28
  29 void spuInterrupt() {
  30         HW_DMA4_CHCR &= SWAP32(~0x01000000);
  31         DMA_INTERRUPT(4);
  32 }
  33
  34 void psxDma4(u32 madr, u32 bcr, u32 chcr) { // SPU
  35         u16 *ptr;
  36         u32 size;
  37
  38         switch (chcr) {
  39                 case 0x01000201: //cpu to spu transfer
  40 #ifdef PSXDMA_LOG
  41                         PSXDMA_LOG("*** DMA4 SPU - mem2spu *** %x addr = %x size = %x\n", chcr, madr, bcr);
  42 #endif
  43                         ptr = (u16 *)PSXM(madr);
  44                         if (ptr == NULL) {
  45 #ifdef CPU_LOG
  46                                 CPU_LOG("*** DMA4 SPU - mem2spu *** NULL Pointer!!!\n");
  47 #endif
  48                                 break;
  49                         }
  50                         SPU_writeDMAMem(ptr, (bcr >> 16) * (bcr & 0xffff) * 2);
  51                         SPUDMA_INT((bcr >> 16) * (bcr & 0xffff) / 2);
  52                         return;
  53
  54                 case 0x01000200: //spu to cpu transfer
  55 #ifdef PSXDMA_LOG
  56                         PSXDMA_LOG("*** DMA4 SPU - spu2mem *** %x addr = %x size = %x\n", chcr, madr, bcr);
  57 #endif
  58                         ptr = (u16 *)PSXM(madr);
  59                         if (ptr == NULL) {
  60 #ifdef CPU_LOG
  61                                 CPU_LOG("*** DMA4 SPU - spu2mem *** NULL Pointer!!!\n");
  62 #endif
  63                                 break;
  64                         }
  65                         size = (bcr >> 16) * (bcr & 0xffff) * 2;
  66                         SPU_readDMAMem(ptr, size);
  67                         psxCpu->Clear(madr, size);
  68                         break;
  69
  70 #ifdef PSXDMA_LOG
  71                 default:
  72                         PSXDMA_LOG("*** DMA4 SPU - unknown *** %x addr = %x size = %x\n", chcr, madr, bcr);
  73                         break;
  74 #endif
  75         }
  76
  77         HW_DMA4_CHCR &= SWAP32(~0x01000000);
  78         DMA_INTERRUPT(4);
  79 }
  80
  81 void psxDma2(u32 madr, u32 bcr, u32 chcr) { // GPU
  82         u32 *ptr;
  83         u32 size;
  84
  85         switch(chcr) {
  86                 case 0x01000200: // vram2mem
  87 #ifdef PSXDMA_LOG
  88                         PSXDMA_LOG("*** DMA2 GPU - vram2mem *** %x addr = %x size = %x\n", chcr, madr, bcr);
  89 #endif
  90                         ptr = (u32 *)PSXM(madr);
  91                         if (ptr == NULL) {
  92 #ifdef CPU_LOG
  93                                 CPU_LOG("*** DMA2 GPU - vram2mem *** NULL Pointer!!!\n");
  94 #endif
  95                                 break;
  96                         }
  97                         size = (bcr >> 16) * (bcr & 0xffff);
  98                         GPU_readDataMem(ptr, size);
  99                         psxCpu->Clear(madr, size);
 100                         break;
 101
 102                 case 0x01000201: // mem2vram
 103 #ifdef PSXDMA_LOG
 104                         PSXDMA_LOG("*** DMA 2 - GPU mem2vram *** %x addr = %x size = %x\n", chcr, madr, bcr);
 105 #endif
 106                         ptr = (u32 *)PSXM(madr);
 107                         if (ptr == NULL) {
 108 #ifdef CPU_LOG
 109                                 CPU_LOG("*** DMA2 GPU - mem2vram *** NULL Pointer!!!\n");
 110 #endif
 111                                 break;
 112                         }
 113                         size = (bcr >> 16) * (bcr & 0xffff);
 114                         GPU_writeDataMem(ptr, size);
 115                         GPUDMA_INT(size / 4);
 116                         return;
 117
 118                 case 0x01000401: // dma chain
 119 #ifdef PSXDMA_LOG
 120                         PSXDMA_LOG("*** DMA 2 - GPU dma chain *** %x addr = %x size = %x\n", chcr, madr, bcr);
 121 #endif
 122                         GPU_dmaChain((u32 *)psxM, madr & 0x1fffff);
 123                         break;
 124
 125 #ifdef PSXDMA_LOG
 126                 default:
 127                         PSXDMA_LOG("*** DMA 2 - GPU unknown *** %x addr = %x size = %x\n", chcr, madr, bcr);
 128                         break;
 129 #endif
 130         }
 131
 132         HW_DMA2_CHCR &= SWAP32(~0x01000000);
 133         DMA_INTERRUPT(2);
 134 }
 135
 136 void gpuInterrupt() {
 137         HW_DMA2_CHCR &= SWAP32(~0x01000000);
 138         DMA_INTERRUPT(2);
 139 }
 140
 141 void psxDma6(u32 madr, u32 bcr, u32 chcr) {
 142         u32 *mem = (u32 *)PSXM(madr);
 143
 144 #ifdef PSXDMA_LOG
 145         PSXDMA_LOG("*** DMA6 OT *** %x addr = %x size = %x\n", chcr, madr, bcr);
 146 #endif
 147
 148         if (chcr == 0x11000002) {
 149                 if (mem == NULL) {
 150 #ifdef CPU_LOG
 151                         CPU_LOG("*** DMA6 OT *** NULL Pointer!!!\n");
 152 #endif
 153                         HW_DMA6_CHCR &= SWAP32(~0x01000000);
 154                         DMA_INTERRUPT(6);
 155                         return;
 156                 }
 157
 158                 while (bcr--) {
 159                         *mem-- = SWAP32((madr - 4) & 0xffffff);
 160                         madr -= 4;
 161                 }
 162                 mem++; *mem = 0xffffff;
 163         }
 164 #ifdef PSXDMA_LOG
 165         else {
 166                 // Unknown option
 167                 PSXDMA_LOG("*** DMA6 OT - unknown *** %x addr = %x size = %x\n", chcr, madr, bcr);
 168         }
 169 #endif
 170
 171         HW_DMA6_CHCR &= SWAP32(~0x01000000);
 172         DMA_INTERRUPT(6);
 173 }
 174