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);
48 if (ptr == INVALID_PTR) {
50 CPU_LOG("*** DMA4 SPU - mem2spu *** NULL Pointer!!!\n");
54 words = (bcr >> 16) * (bcr & 0xffff);
55 SPU_writeDMAMem(ptr, words * 2, psxRegs.cycle);
56 HW_DMA4_MADR = SWAPu32(madr + words * 4);
57 SPUDMA_INT(words / 2);
60 case 0x01000200: //spu to cpu transfer
62 PSXDMA_LOG("*** DMA4 SPU - spu2mem *** %x addr = %x size = %x\n", chcr, madr, bcr);
64 ptr = (u16 *)PSXM(madr);
65 if (ptr == INVALID_PTR) {
67 CPU_LOG("*** DMA4 SPU - spu2mem *** NULL Pointer!!!\n");
71 words = (bcr >> 16) * (bcr & 0xffff);
72 SPU_readDMAMem(ptr, words * 2, psxRegs.cycle);
73 psxCpu->Clear(madr, words);
75 HW_DMA4_MADR = SWAPu32(madr + words * 4);
76 SPUDMA_INT(words / 2);
81 PSXDMA_LOG("*** DMA4 SPU - unknown *** %x addr = %x size = %x\n", chcr, madr, bcr);
86 HW_DMA4_CHCR &= SWAP32(~0x01000000);
90 // Taken from PEOPS SOFTGPU
91 static inline boolean CheckForEndlessLoop(u32 laddr, u32 *lUsedAddr) {
92 if (laddr == lUsedAddr[1]) return TRUE;
93 if (laddr == lUsedAddr[2]) return TRUE;
95 if (laddr < lUsedAddr[0]) lUsedAddr[1] = laddr;
96 else lUsedAddr[2] = laddr;
103 static u32 gpuDmaChainSize(u32 addr) {
105 u32 DMACommandCounter = 0;
108 lUsedAddr[0] = lUsedAddr[1] = lUsedAddr[2] = 0xffffff;
110 // initial linked list ptr (word)
116 if (DMACommandCounter++ > 2000000) break;
117 if (CheckForEndlessLoop(addr, lUsedAddr)) break;
119 // # 32-bit blocks to transfer
120 size += psxMu8( addr + 3 );
122 // next 32-bit pointer
123 addr = psxMu32( addr & ~0x3 ) & 0xffffff;
125 } while (addr != 0xffffff);
130 void psxDma2(u32 madr, u32 bcr, u32 chcr) { // GPU
136 case 0x01000200: // vram2mem
138 PSXDMA_LOG("*** DMA2 GPU - vram2mem *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
140 ptr = (u32 *)PSXM(madr);
141 if (ptr == INVALID_PTR) {
143 CPU_LOG("*** DMA2 GPU - vram2mem *** NULL Pointer!!!\n");
147 // BA blocks * BS words (word = 32-bits)
148 words = (bcr >> 16) * (bcr & 0xffff);
149 GPU_readDataMem(ptr, words);
150 psxCpu->Clear(madr, words);
152 HW_DMA2_MADR = SWAPu32(madr + words * 4);
154 // already 32-bit word size ((size * 4) / 4)
155 GPUDMA_INT(words / 4);
158 case 0x01000201: // mem2vram
160 PSXDMA_LOG("*** DMA 2 - GPU mem2vram *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
162 ptr = (u32 *)PSXM(madr);
163 if (ptr == INVALID_PTR) {
165 CPU_LOG("*** DMA2 GPU - mem2vram *** NULL Pointer!!!\n");
169 // BA blocks * BS words (word = 32-bits)
170 words = (bcr >> 16) * (bcr & 0xffff);
171 GPU_writeDataMem(ptr, words);
173 HW_DMA2_MADR = SWAPu32(madr + words * 4);
175 // already 32-bit word size ((size * 4) / 4)
176 GPUDMA_INT(words / 4);
179 case 0x01000401: // dma chain
181 PSXDMA_LOG("*** DMA 2 - GPU dma chain *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
184 size = GPU_dmaChain((u32 *)psxM, madr & 0x1fffff);
186 size = gpuDmaChainSize(madr);
187 HW_GPU_STATUS &= ~PSXGPU_nBUSY;
189 // we don't emulate progress, just busy flag and end irq,
190 // so pretend we're already at the last block
191 HW_DMA2_MADR = SWAPu32(0xffffff);
193 // Tekken 3 = use 1.0 only (not 1.5x)
195 // Einhander = parse linked list in pieces (todo)
196 // Final Fantasy 4 = internal vram time (todo)
197 // Rebel Assault 2 = parse linked list in pieces (todo)
198 // Vampire Hunter D = allow edits to linked list (todo)
204 PSXDMA_LOG("*** DMA 2 - GPU unknown *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
209 HW_DMA2_CHCR &= SWAP32(~0x01000000);
213 void gpuInterrupt() {
214 if (HW_DMA2_CHCR & SWAP32(0x01000000))
216 HW_DMA2_CHCR &= SWAP32(~0x01000000);
219 HW_GPU_STATUS |= PSXGPU_nBUSY; // GPU no longer busy
222 void psxDma6(u32 madr, u32 bcr, u32 chcr) {
224 u32 *mem = (u32 *)PSXM(madr);
227 PSXDMA_LOG("*** DMA6 OT *** %x addr = %x size = %x\n", chcr, madr, bcr);
230 if (chcr == 0x11000002) {
231 if (mem == INVALID_PTR) {
233 CPU_LOG("*** DMA6 OT *** NULL Pointer!!!\n");
235 HW_DMA6_CHCR &= SWAP32(~0x01000000);
240 // already 32-bit size
244 *mem-- = SWAP32((madr - 4) & 0xffffff);
247 mem++; *mem = 0xffffff;
249 //GPUOTCDMA_INT(size);
251 psxRegs.cycle += words;
258 PSXDMA_LOG("*** DMA6 OT - unknown *** %x addr = %x size = %x\n", chcr, madr, bcr);
262 HW_DMA6_CHCR &= SWAP32(~0x01000000);
266 void gpuotcInterrupt()
268 if (HW_DMA6_CHCR & SWAP32(0x01000000))
270 HW_DMA6_CHCR &= SWAP32(~0x01000000);