1 /***************************************************************************
2 * Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team *
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. *
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. *
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 ***************************************************************************/
21 * Handles PSX DMA functions.
30 HW_DMA4_CHCR &= SWAP32(~0x01000000);
34 void psxDma4(u32 madr, u32 bcr, u32 chcr) { // SPU
39 case 0x01000201: //cpu to spu transfer
41 PSXDMA_LOG("*** DMA4 SPU - mem2spu *** %x addr = %x size = %x\n", chcr, madr, bcr);
43 ptr = (u16 *)PSXM(madr);
46 CPU_LOG("*** DMA4 SPU - mem2spu *** NULL Pointer!!!\n");
50 SPU_writeDMAMem(ptr, (bcr >> 16) * (bcr & 0xffff) * 2);
51 SPUDMA_INT((bcr >> 16) * (bcr & 0xffff) / 2);
54 case 0x01000200: //spu to cpu transfer
56 PSXDMA_LOG("*** DMA4 SPU - spu2mem *** %x addr = %x size = %x\n", chcr, madr, bcr);
58 ptr = (u16 *)PSXM(madr);
61 CPU_LOG("*** DMA4 SPU - spu2mem *** NULL Pointer!!!\n");
65 size = (bcr >> 16) * (bcr & 0xffff) * 2;
66 SPU_readDMAMem(ptr, size);
67 psxCpu->Clear(madr, size);
72 PSXDMA_LOG("*** DMA4 SPU - unknown *** %x addr = %x size = %x\n", chcr, madr, bcr);
77 HW_DMA4_CHCR &= SWAP32(~0x01000000);
81 // Taken from PEOPS SOFTGPU
82 static inline boolean CheckForEndlessLoop(u32 laddr, u32 *lUsedAddr) {
83 if (laddr == lUsedAddr[1]) return TRUE;
84 if (laddr == lUsedAddr[2]) return TRUE;
86 if (laddr < lUsedAddr[0]) lUsedAddr[1] = laddr;
87 else lUsedAddr[2] = laddr;
94 static u32 gpuDmaChainSize(u32 addr) {
96 u32 DMACommandCounter = 0;
99 lUsedAddr[0] = lUsedAddr[1] = lUsedAddr[2] = 0xffffff;
101 // initial linked list ptr (word)
107 if (DMACommandCounter++ > 2000000) break;
108 if (CheckForEndlessLoop(addr, lUsedAddr)) break;
110 // # 32-bit blocks to transfer
111 size += psxMu8( addr + 3 );
113 // next 32-bit pointer
114 addr = psxMu32( addr & ~0x3 ) & 0xffffff;
116 } while (addr != 0xffffff);
121 void psxDma2(u32 madr, u32 bcr, u32 chcr) { // GPU
126 case 0x01000200: // vram2mem
128 PSXDMA_LOG("*** DMA2 GPU - vram2mem *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
130 ptr = (u32 *)PSXM(madr);
133 CPU_LOG("*** DMA2 GPU - vram2mem *** NULL Pointer!!!\n");
137 // BA blocks * BS words (word = 32-bits)
138 size = (bcr >> 16) * (bcr & 0xffff);
139 GPU_readDataMem(ptr, size);
140 psxCpu->Clear(madr, size);
142 // already 32-bit word size ((size * 4) / 4)
146 case 0x01000201: // mem2vram
148 PSXDMA_LOG("*** DMA 2 - GPU mem2vram *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
150 ptr = (u32 *)PSXM(madr);
153 CPU_LOG("*** DMA2 GPU - mem2vram *** NULL Pointer!!!\n");
157 // BA blocks * BS words (word = 32-bits)
158 size = (bcr >> 16) * (bcr & 0xffff);
159 GPU_writeDataMem(ptr, size);
161 // already 32-bit word size ((size * 4) / 4)
165 case 0x01000401: // dma chain
167 PSXDMA_LOG("*** DMA 2 - GPU dma chain *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
170 size = gpuDmaChainSize(madr);
171 GPU_dmaChain((u32 *)psxM, madr & 0x1fffff);
173 // Tekken 3 = use 1.0 only (not 1.5x)
175 // Einhander = parse linked list in pieces (todo)
176 // Final Fantasy 4 = internal vram time (todo)
177 // Rebel Assault 2 = parse linked list in pieces (todo)
178 // Vampire Hunter D = allow edits to linked list (todo)
184 PSXDMA_LOG("*** DMA 2 - GPU unknown *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
189 HW_DMA2_CHCR &= SWAP32(~0x01000000);
193 void gpuInterrupt() {
194 HW_DMA2_CHCR &= SWAP32(~0x01000000);
198 void psxDma6(u32 madr, u32 bcr, u32 chcr) {
200 u32 *mem = (u32 *)PSXM(madr);
203 PSXDMA_LOG("*** DMA6 OT *** %x addr = %x size = %x\n", chcr, madr, bcr);
206 if (chcr == 0x11000002) {
209 CPU_LOG("*** DMA6 OT *** NULL Pointer!!!\n");
211 HW_DMA6_CHCR &= SWAP32(~0x01000000);
216 // already 32-bit size
220 *mem-- = SWAP32((madr - 4) & 0xffffff);
223 mem++; *mem = 0xffffff;
231 PSXDMA_LOG("*** DMA6 OT - unknown *** %x addr = %x size = %x\n", chcr, madr, bcr);
235 HW_DMA6_CHCR &= SWAP32(~0x01000000);
239 void gpuotcInterrupt()
241 HW_DMA6_CHCR &= SWAP32(~0x01000000);