| 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 | |