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.
31 if (HW_DMA4_CHCR & SWAP32(0x01000000))
33 HW_DMA4_CHCR &= SWAP32(~0x01000000);
38 void psxDma4(u32 madr, u32 bcr, u32 chcr) { // SPU
43 case 0x01000201: //cpu to spu transfer
45 PSXDMA_LOG("*** DMA4 SPU - mem2spu *** %x addr = %x size = %x\n", chcr, madr, bcr);
47 ptr = (u16 *)PSXM(madr);
50 CPU_LOG("*** DMA4 SPU - mem2spu *** NULL Pointer!!!\n");
54 SPU_writeDMAMem(ptr, (bcr >> 16) * (bcr & 0xffff) * 2, psxRegs.cycle);
55 SPUDMA_INT((bcr >> 16) * (bcr & 0xffff) / 2);
58 case 0x01000200: //spu to cpu transfer
60 PSXDMA_LOG("*** DMA4 SPU - spu2mem *** %x addr = %x size = %x\n", chcr, madr, bcr);
62 ptr = (u16 *)PSXM(madr);
65 CPU_LOG("*** DMA4 SPU - spu2mem *** NULL Pointer!!!\n");
69 size = (bcr >> 16) * (bcr & 0xffff) * 2;
70 SPU_readDMAMem(ptr, size, psxRegs.cycle);
71 psxCpu->Clear(madr, size);
76 PSXDMA_LOG("*** DMA4 SPU - unknown *** %x addr = %x size = %x\n", chcr, madr, bcr);
81 HW_DMA4_CHCR &= SWAP32(~0x01000000);
85 // Taken from PEOPS SOFTGPU
86 static inline boolean CheckForEndlessLoop(u32 laddr, u32 *lUsedAddr) {
87 if (laddr == lUsedAddr[1]) return TRUE;
88 if (laddr == lUsedAddr[2]) return TRUE;
90 if (laddr < lUsedAddr[0]) lUsedAddr[1] = laddr;
91 else lUsedAddr[2] = laddr;
98 static u32 gpuDmaChainSize(u32 addr) {
100 u32 DMACommandCounter = 0;
103 lUsedAddr[0] = lUsedAddr[1] = lUsedAddr[2] = 0xffffff;
105 // initial linked list ptr (word)
111 if (DMACommandCounter++ > 2000000) break;
112 if (CheckForEndlessLoop(addr, lUsedAddr)) break;
114 // # 32-bit blocks to transfer
115 size += psxMu8( addr + 3 );
117 // next 32-bit pointer
118 addr = psxMu32( addr & ~0x3 ) & 0xffffff;
120 } while (addr != 0xffffff);
125 void psxDma2(u32 madr, u32 bcr, u32 chcr) { // GPU
130 case 0x01000200: // vram2mem
132 PSXDMA_LOG("*** DMA2 GPU - vram2mem *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
134 ptr = (u32 *)PSXM(madr);
137 CPU_LOG("*** DMA2 GPU - vram2mem *** NULL Pointer!!!\n");
141 // BA blocks * BS words (word = 32-bits)
142 size = (bcr >> 16) * (bcr & 0xffff);
143 GPU_readDataMem(ptr, size);
144 psxCpu->Clear(madr, size);
146 // already 32-bit word size ((size * 4) / 4)
147 GPUDMA_INT(size / 4);
150 case 0x01000201: // mem2vram
152 PSXDMA_LOG("*** DMA 2 - GPU mem2vram *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
154 ptr = (u32 *)PSXM(madr);
157 CPU_LOG("*** DMA2 GPU - mem2vram *** NULL Pointer!!!\n");
161 // BA blocks * BS words (word = 32-bits)
162 size = (bcr >> 16) * (bcr & 0xffff);
163 GPU_writeDataMem(ptr, size);
165 // already 32-bit word size ((size * 4) / 4)
166 GPUDMA_INT(size / 4);
169 case 0x01000401: // dma chain
171 PSXDMA_LOG("*** DMA 2 - GPU dma chain *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
174 size = GPU_dmaChain((u32 *)psxM, madr & 0x1fffff);
176 size = gpuDmaChainSize(madr);
177 HW_GPU_STATUS &= ~PSXGPU_nBUSY;
179 // Tekken 3 = use 1.0 only (not 1.5x)
181 // Einhander = parse linked list in pieces (todo)
182 // Final Fantasy 4 = internal vram time (todo)
183 // Rebel Assault 2 = parse linked list in pieces (todo)
184 // Vampire Hunter D = allow edits to linked list (todo)
190 PSXDMA_LOG("*** DMA 2 - GPU unknown *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
195 HW_DMA2_CHCR &= SWAP32(~0x01000000);
199 void gpuInterrupt() {
200 if (HW_DMA2_CHCR & SWAP32(0x01000000))
202 HW_DMA2_CHCR &= SWAP32(~0x01000000);
205 HW_GPU_STATUS |= PSXGPU_nBUSY; // GPU no longer busy
208 void psxDma6(u32 madr, u32 bcr, u32 chcr) {
210 u32 *mem = (u32 *)PSXM(madr);
213 PSXDMA_LOG("*** DMA6 OT *** %x addr = %x size = %x\n", chcr, madr, bcr);
216 if (chcr == 0x11000002) {
219 CPU_LOG("*** DMA6 OT *** NULL Pointer!!!\n");
221 HW_DMA6_CHCR &= SWAP32(~0x01000000);
226 // already 32-bit size
230 *mem-- = SWAP32((madr - 4) & 0xffffff);
233 mem++; *mem = 0xffffff;
241 PSXDMA_LOG("*** DMA6 OT - unknown *** %x addr = %x size = %x\n", chcr, madr, bcr);
245 HW_DMA6_CHCR &= SWAP32(~0x01000000);
249 void gpuotcInterrupt()
251 if (HW_DMA6_CHCR & SWAP32(0x01000000))
253 HW_DMA6_CHCR &= SWAP32(~0x01000000);