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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; | |
40 | u32 size; | |
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 | } | |
54 | SPU_writeDMAMem(ptr, (bcr >> 16) * (bcr & 0xffff) * 2); | |
55 | SPUDMA_INT((bcr >> 16) * (bcr & 0xffff) / 2); | |
56 | return; | |
57 | ||
58 | case 0x01000200: //spu to cpu transfer | |
59 | #ifdef PSXDMA_LOG | |
60 | PSXDMA_LOG("*** DMA4 SPU - spu2mem *** %x addr = %x size = %x\n", chcr, madr, bcr); | |
61 | #endif | |
62 | ptr = (u16 *)PSXM(madr); | |
63 | if (ptr == NULL) { | |
64 | #ifdef CPU_LOG | |
65 | CPU_LOG("*** DMA4 SPU - spu2mem *** NULL Pointer!!!\n"); | |
66 | #endif | |
67 | break; | |
68 | } | |
69 | size = (bcr >> 16) * (bcr & 0xffff) * 2; | |
70 | SPU_readDMAMem(ptr, size); | |
71 | psxCpu->Clear(madr, size); | |
72 | break; | |
73 | ||
74 | #ifdef PSXDMA_LOG | |
75 | default: | |
76 | PSXDMA_LOG("*** DMA4 SPU - unknown *** %x addr = %x size = %x\n", chcr, madr, bcr); | |
77 | break; | |
78 | #endif | |
79 | } | |
80 | ||
81 | HW_DMA4_CHCR &= SWAP32(~0x01000000); | |
82 | DMA_INTERRUPT(4); | |
83 | } | |
84 | ||
57a757ce | 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; | |
89 | ||
90 | if (laddr < lUsedAddr[0]) lUsedAddr[1] = laddr; | |
91 | else lUsedAddr[2] = laddr; | |
92 | ||
93 | lUsedAddr[0] = laddr; | |
94 | ||
95 | return FALSE; | |
96 | } | |
97 | ||
98 | static u32 gpuDmaChainSize(u32 addr) { | |
99 | u32 size; | |
100 | u32 DMACommandCounter = 0; | |
101 | u32 lUsedAddr[3]; | |
102 | ||
103 | lUsedAddr[0] = lUsedAddr[1] = lUsedAddr[2] = 0xffffff; | |
104 | ||
105 | // initial linked list ptr (word) | |
106 | size = 1; | |
107 | ||
108 | do { | |
109 | addr &= 0x1ffffc; | |
110 | ||
111 | if (DMACommandCounter++ > 2000000) break; | |
112 | if (CheckForEndlessLoop(addr, lUsedAddr)) break; | |
113 | ||
114 | // # 32-bit blocks to transfer | |
115 | size += psxMu8( addr + 3 ); | |
116 | ||
117 | // next 32-bit pointer | |
118 | addr = psxMu32( addr & ~0x3 ) & 0xffffff; | |
119 | size += 1; | |
120 | } while (addr != 0xffffff); | |
121 | ||
122 | return size; | |
123 | } | |
124 | ||
ef79bbde P |
125 | void psxDma2(u32 madr, u32 bcr, u32 chcr) { // GPU |
126 | u32 *ptr; | |
127 | u32 size; | |
128 | ||
57a757ce | 129 | switch (chcr) { |
ef79bbde P |
130 | case 0x01000200: // vram2mem |
131 | #ifdef PSXDMA_LOG | |
57a757ce | 132 | PSXDMA_LOG("*** DMA2 GPU - vram2mem *** %lx addr = %lx size = %lx\n", chcr, madr, bcr); |
ef79bbde P |
133 | #endif |
134 | ptr = (u32 *)PSXM(madr); | |
135 | if (ptr == NULL) { | |
136 | #ifdef CPU_LOG | |
137 | CPU_LOG("*** DMA2 GPU - vram2mem *** NULL Pointer!!!\n"); | |
138 | #endif | |
139 | break; | |
140 | } | |
57a757ce | 141 | // BA blocks * BS words (word = 32-bits) |
ef79bbde P |
142 | size = (bcr >> 16) * (bcr & 0xffff); |
143 | GPU_readDataMem(ptr, size); | |
144 | psxCpu->Clear(madr, size); | |
57a757ce | 145 | |
146 | // already 32-bit word size ((size * 4) / 4) | |
916a765b | 147 | GPUDMA_INT(size / 4); |
57a757ce | 148 | return; |
ef79bbde P |
149 | |
150 | case 0x01000201: // mem2vram | |
151 | #ifdef PSXDMA_LOG | |
57a757ce | 152 | PSXDMA_LOG("*** DMA 2 - GPU mem2vram *** %lx addr = %lx size = %lx\n", chcr, madr, bcr); |
ef79bbde P |
153 | #endif |
154 | ptr = (u32 *)PSXM(madr); | |
155 | if (ptr == NULL) { | |
156 | #ifdef CPU_LOG | |
157 | CPU_LOG("*** DMA2 GPU - mem2vram *** NULL Pointer!!!\n"); | |
158 | #endif | |
159 | break; | |
160 | } | |
57a757ce | 161 | // BA blocks * BS words (word = 32-bits) |
ef79bbde P |
162 | size = (bcr >> 16) * (bcr & 0xffff); |
163 | GPU_writeDataMem(ptr, size); | |
57a757ce | 164 | |
165 | // already 32-bit word size ((size * 4) / 4) | |
916a765b | 166 | GPUDMA_INT(size / 4); |
ef79bbde P |
167 | return; |
168 | ||
169 | case 0x01000401: // dma chain | |
170 | #ifdef PSXDMA_LOG | |
57a757ce | 171 | PSXDMA_LOG("*** DMA 2 - GPU dma chain *** %lx addr = %lx size = %lx\n", chcr, madr, bcr); |
ef79bbde | 172 | #endif |
57a757ce | 173 | |
b03e0caf | 174 | size = GPU_dmaChain((u32 *)psxM, madr & 0x1fffff); |
175 | if ((int)size <= 0) | |
176 | size = gpuDmaChainSize(madr); | |
6c036261 | 177 | HW_GPU_STATUS &= ~PSXGPU_nBUSY; |
57a757ce | 178 | |
179 | // Tekken 3 = use 1.0 only (not 1.5x) | |
180 | ||
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) | |
185 | GPUDMA_INT(size); | |
186 | return; | |
ef79bbde P |
187 | |
188 | #ifdef PSXDMA_LOG | |
189 | default: | |
57a757ce | 190 | PSXDMA_LOG("*** DMA 2 - GPU unknown *** %lx addr = %lx size = %lx\n", chcr, madr, bcr); |
ef79bbde P |
191 | break; |
192 | #endif | |
193 | } | |
194 | ||
195 | HW_DMA2_CHCR &= SWAP32(~0x01000000); | |
196 | DMA_INTERRUPT(2); | |
197 | } | |
198 | ||
199 | void gpuInterrupt() { | |
ad418c19 | 200 | if (HW_DMA2_CHCR & SWAP32(0x01000000)) |
201 | { | |
202 | HW_DMA2_CHCR &= SWAP32(~0x01000000); | |
203 | DMA_INTERRUPT(2); | |
204 | } | |
6c036261 | 205 | HW_GPU_STATUS |= PSXGPU_nBUSY; // GPU no longer busy |
ef79bbde P |
206 | } |
207 | ||
208 | void psxDma6(u32 madr, u32 bcr, u32 chcr) { | |
57a757ce | 209 | u32 size; |
ef79bbde P |
210 | u32 *mem = (u32 *)PSXM(madr); |
211 | ||
212 | #ifdef PSXDMA_LOG | |
213 | PSXDMA_LOG("*** DMA6 OT *** %x addr = %x size = %x\n", chcr, madr, bcr); | |
214 | #endif | |
215 | ||
216 | if (chcr == 0x11000002) { | |
217 | if (mem == NULL) { | |
218 | #ifdef CPU_LOG | |
219 | CPU_LOG("*** DMA6 OT *** NULL Pointer!!!\n"); | |
220 | #endif | |
221 | HW_DMA6_CHCR &= SWAP32(~0x01000000); | |
222 | DMA_INTERRUPT(6); | |
223 | return; | |
224 | } | |
225 | ||
57a757ce | 226 | // already 32-bit size |
227 | size = bcr; | |
228 | ||
ef79bbde P |
229 | while (bcr--) { |
230 | *mem-- = SWAP32((madr - 4) & 0xffffff); | |
231 | madr -= 4; | |
232 | } | |
233 | mem++; *mem = 0xffffff; | |
57a757ce | 234 | |
235 | GPUOTCDMA_INT(size); | |
236 | return; | |
ef79bbde P |
237 | } |
238 | #ifdef PSXDMA_LOG | |
239 | else { | |
240 | // Unknown option | |
241 | PSXDMA_LOG("*** DMA6 OT - unknown *** %x addr = %x size = %x\n", chcr, madr, bcr); | |
242 | } | |
243 | #endif | |
244 | ||
245 | HW_DMA6_CHCR &= SWAP32(~0x01000000); | |
246 | DMA_INTERRUPT(6); | |
247 | } | |
248 | ||
57a757ce | 249 | void gpuotcInterrupt() |
250 | { | |
ad418c19 | 251 | if (HW_DMA6_CHCR & SWAP32(0x01000000)) |
252 | { | |
253 | HW_DMA6_CHCR &= SWAP32(~0x01000000); | |
254 | DMA_INTERRUPT(6); | |
255 | } | |
57a757ce | 256 | } |