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ef79bbde P |
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" | |
6c036261 | 25 | #include "gpu.h" |
ef79bbde P |
26 | |
27 | // Dma0/1 in Mdec.c | |
28 | // Dma3 in CdRom.c | |
29 | ||
30 | void spuInterrupt() { | |
ad418c19 | 31 | if (HW_DMA4_CHCR & SWAP32(0x01000000)) |
32 | { | |
33 | HW_DMA4_CHCR &= SWAP32(~0x01000000); | |
34 | DMA_INTERRUPT(4); | |
35 | } | |
ef79bbde P |
36 | } |
37 | ||
38 | void psxDma4(u32 madr, u32 bcr, u32 chcr) { // SPU | |
39 | u16 *ptr; | |
58ebb94c | 40 | u32 words; |
ef79bbde P |
41 | |
42 | switch (chcr) { | |
43 | case 0x01000201: //cpu to spu transfer | |
44 | #ifdef PSXDMA_LOG | |
45 | PSXDMA_LOG("*** DMA4 SPU - mem2spu *** %x addr = %x size = %x\n", chcr, madr, bcr); | |
46 | #endif | |
47 | ptr = (u16 *)PSXM(madr); | |
48 | if (ptr == NULL) { | |
49 | #ifdef CPU_LOG | |
50 | CPU_LOG("*** DMA4 SPU - mem2spu *** NULL Pointer!!!\n"); | |
51 | #endif | |
52 | break; | |
53 | } | |
58ebb94c | 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); | |
ef79bbde P |
58 | return; |
59 | ||
60 | case 0x01000200: //spu to cpu transfer | |
61 | #ifdef PSXDMA_LOG | |
62 | PSXDMA_LOG("*** DMA4 SPU - spu2mem *** %x addr = %x size = %x\n", chcr, madr, bcr); | |
63 | #endif | |
64 | ptr = (u16 *)PSXM(madr); | |
65 | if (ptr == NULL) { | |
66 | #ifdef CPU_LOG | |
67 | CPU_LOG("*** DMA4 SPU - spu2mem *** NULL Pointer!!!\n"); | |
68 | #endif | |
69 | break; | |
70 | } | |
58ebb94c | 71 | words = (bcr >> 16) * (bcr & 0xffff); |
72 | SPU_readDMAMem(ptr, words * 2, psxRegs.cycle); | |
73 | psxCpu->Clear(madr, words); | |
74 | ||
75 | HW_DMA4_MADR = SWAPu32(madr + words * 4); | |
76 | SPUDMA_INT(words / 2); | |
77 | return; | |
ef79bbde P |
78 | |
79 | #ifdef PSXDMA_LOG | |
80 | default: | |
81 | PSXDMA_LOG("*** DMA4 SPU - unknown *** %x addr = %x size = %x\n", chcr, madr, bcr); | |
82 | break; | |
83 | #endif | |
84 | } | |
85 | ||
86 | HW_DMA4_CHCR &= SWAP32(~0x01000000); | |
87 | DMA_INTERRUPT(4); | |
88 | } | |
89 | ||
57a757ce | 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; | |
94 | ||
95 | if (laddr < lUsedAddr[0]) lUsedAddr[1] = laddr; | |
96 | else lUsedAddr[2] = laddr; | |
97 | ||
98 | lUsedAddr[0] = laddr; | |
99 | ||
100 | return FALSE; | |
101 | } | |
102 | ||
103 | static u32 gpuDmaChainSize(u32 addr) { | |
104 | u32 size; | |
105 | u32 DMACommandCounter = 0; | |
106 | u32 lUsedAddr[3]; | |
107 | ||
108 | lUsedAddr[0] = lUsedAddr[1] = lUsedAddr[2] = 0xffffff; | |
109 | ||
110 | // initial linked list ptr (word) | |
111 | size = 1; | |
112 | ||
113 | do { | |
114 | addr &= 0x1ffffc; | |
115 | ||
116 | if (DMACommandCounter++ > 2000000) break; | |
117 | if (CheckForEndlessLoop(addr, lUsedAddr)) break; | |
118 | ||
119 | // # 32-bit blocks to transfer | |
120 | size += psxMu8( addr + 3 ); | |
121 | ||
122 | // next 32-bit pointer | |
123 | addr = psxMu32( addr & ~0x3 ) & 0xffffff; | |
124 | size += 1; | |
502ea36e | 125 | } while (!(addr & 0x800000)); // contrary to some documentation, the end-of-linked-list marker is not actually 0xFF'FFFF |
126 | // any pointer with bit 23 set will do. | |
57a757ce | 127 | |
128 | return size; | |
129 | } | |
130 | ||
ef79bbde P |
131 | void psxDma2(u32 madr, u32 bcr, u32 chcr) { // GPU |
132 | u32 *ptr; | |
58ebb94c | 133 | u32 words; |
ef79bbde P |
134 | u32 size; |
135 | ||
57a757ce | 136 | switch (chcr) { |
ef79bbde P |
137 | case 0x01000200: // vram2mem |
138 | #ifdef PSXDMA_LOG | |
57a757ce | 139 | PSXDMA_LOG("*** DMA2 GPU - vram2mem *** %lx addr = %lx size = %lx\n", chcr, madr, bcr); |
ef79bbde P |
140 | #endif |
141 | ptr = (u32 *)PSXM(madr); | |
142 | if (ptr == NULL) { | |
143 | #ifdef CPU_LOG | |
144 | CPU_LOG("*** DMA2 GPU - vram2mem *** NULL Pointer!!!\n"); | |
145 | #endif | |
146 | break; | |
147 | } | |
57a757ce | 148 | // BA blocks * BS words (word = 32-bits) |
58ebb94c | 149 | words = (bcr >> 16) * (bcr & 0xffff); |
150 | GPU_readDataMem(ptr, words); | |
151 | psxCpu->Clear(madr, words); | |
152 | ||
153 | HW_DMA2_MADR = SWAPu32(madr + words * 4); | |
57a757ce | 154 | |
155 | // already 32-bit word size ((size * 4) / 4) | |
58ebb94c | 156 | GPUDMA_INT(words / 4); |
57a757ce | 157 | return; |
ef79bbde P |
158 | |
159 | case 0x01000201: // mem2vram | |
160 | #ifdef PSXDMA_LOG | |
57a757ce | 161 | PSXDMA_LOG("*** DMA 2 - GPU mem2vram *** %lx addr = %lx size = %lx\n", chcr, madr, bcr); |
ef79bbde P |
162 | #endif |
163 | ptr = (u32 *)PSXM(madr); | |
164 | if (ptr == NULL) { | |
165 | #ifdef CPU_LOG | |
166 | CPU_LOG("*** DMA2 GPU - mem2vram *** NULL Pointer!!!\n"); | |
167 | #endif | |
168 | break; | |
169 | } | |
57a757ce | 170 | // BA blocks * BS words (word = 32-bits) |
58ebb94c | 171 | words = (bcr >> 16) * (bcr & 0xffff); |
172 | GPU_writeDataMem(ptr, words); | |
173 | ||
174 | HW_DMA2_MADR = SWAPu32(madr + words * 4); | |
57a757ce | 175 | |
176 | // already 32-bit word size ((size * 4) / 4) | |
58ebb94c | 177 | GPUDMA_INT(words / 4); |
ef79bbde P |
178 | return; |
179 | ||
180 | case 0x01000401: // dma chain | |
181 | #ifdef PSXDMA_LOG | |
57a757ce | 182 | PSXDMA_LOG("*** DMA 2 - GPU dma chain *** %lx addr = %lx size = %lx\n", chcr, madr, bcr); |
ef79bbde | 183 | #endif |
57a757ce | 184 | |
b03e0caf | 185 | size = GPU_dmaChain((u32 *)psxM, madr & 0x1fffff); |
186 | if ((int)size <= 0) | |
187 | size = gpuDmaChainSize(madr); | |
086adfff | 188 | HW_GPU_STATUS &= SWAP32(~PSXGPU_nBUSY); |
58ebb94c | 189 | |
190 | // we don't emulate progress, just busy flag and end irq, | |
191 | // so pretend we're already at the last block | |
192 | HW_DMA2_MADR = SWAPu32(0xffffff); | |
193 | ||
57a757ce | 194 | // Tekken 3 = use 1.0 only (not 1.5x) |
195 | ||
196 | // Einhander = parse linked list in pieces (todo) | |
197 | // Final Fantasy 4 = internal vram time (todo) | |
198 | // Rebel Assault 2 = parse linked list in pieces (todo) | |
199 | // Vampire Hunter D = allow edits to linked list (todo) | |
200 | GPUDMA_INT(size); | |
201 | return; | |
ef79bbde P |
202 | |
203 | #ifdef PSXDMA_LOG | |
204 | default: | |
57a757ce | 205 | PSXDMA_LOG("*** DMA 2 - GPU unknown *** %lx addr = %lx size = %lx\n", chcr, madr, bcr); |
ef79bbde P |
206 | break; |
207 | #endif | |
208 | } | |
209 | ||
210 | HW_DMA2_CHCR &= SWAP32(~0x01000000); | |
211 | DMA_INTERRUPT(2); | |
212 | } | |
213 | ||
214 | void gpuInterrupt() { | |
ad418c19 | 215 | if (HW_DMA2_CHCR & SWAP32(0x01000000)) |
216 | { | |
217 | HW_DMA2_CHCR &= SWAP32(~0x01000000); | |
218 | DMA_INTERRUPT(2); | |
219 | } | |
086adfff | 220 | HW_GPU_STATUS |= SWAP32(PSXGPU_nBUSY); // GPU no longer busy |
ef79bbde P |
221 | } |
222 | ||
223 | void psxDma6(u32 madr, u32 bcr, u32 chcr) { | |
fc4803bd | 224 | u32 words; |
ef79bbde P |
225 | u32 *mem = (u32 *)PSXM(madr); |
226 | ||
227 | #ifdef PSXDMA_LOG | |
228 | PSXDMA_LOG("*** DMA6 OT *** %x addr = %x size = %x\n", chcr, madr, bcr); | |
229 | #endif | |
230 | ||
231 | if (chcr == 0x11000002) { | |
232 | if (mem == NULL) { | |
233 | #ifdef CPU_LOG | |
234 | CPU_LOG("*** DMA6 OT *** NULL Pointer!!!\n"); | |
235 | #endif | |
236 | HW_DMA6_CHCR &= SWAP32(~0x01000000); | |
237 | DMA_INTERRUPT(6); | |
238 | return; | |
239 | } | |
240 | ||
57a757ce | 241 | // already 32-bit size |
fc4803bd | 242 | words = bcr; |
57a757ce | 243 | |
ef79bbde P |
244 | while (bcr--) { |
245 | *mem-- = SWAP32((madr - 4) & 0xffffff); | |
246 | madr -= 4; | |
247 | } | |
086adfff | 248 | *++mem = SWAP32(0xffffff); |
57a757ce | 249 | |
fc4803bd | 250 | //GPUOTCDMA_INT(size); |
251 | // halted | |
252 | psxRegs.cycle += words; | |
253 | GPUOTCDMA_INT(16); | |
57a757ce | 254 | return; |
ef79bbde P |
255 | } |
256 | #ifdef PSXDMA_LOG | |
257 | else { | |
258 | // Unknown option | |
259 | PSXDMA_LOG("*** DMA6 OT - unknown *** %x addr = %x size = %x\n", chcr, madr, bcr); | |
260 | } | |
261 | #endif | |
262 | ||
263 | HW_DMA6_CHCR &= SWAP32(~0x01000000); | |
264 | DMA_INTERRUPT(6); | |
265 | } | |
266 | ||
57a757ce | 267 | void gpuotcInterrupt() |
268 | { | |
ad418c19 | 269 | if (HW_DMA6_CHCR & SWAP32(0x01000000)) |
270 | { | |
271 | HW_DMA6_CHCR &= SWAP32(~0x01000000); | |
272 | DMA_INTERRUPT(6); | |
273 | } | |
57a757ce | 274 | } |