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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" | |
25 | ||
26 | // Dma0/1 in Mdec.c | |
27 | // Dma3 in CdRom.c | |
28 | ||
29 | void spuInterrupt() { | |
30 | HW_DMA4_CHCR &= SWAP32(~0x01000000); | |
31 | DMA_INTERRUPT(4); | |
32 | } | |
33 | ||
34 | void psxDma4(u32 madr, u32 bcr, u32 chcr) { // SPU | |
35 | u16 *ptr; | |
36 | u32 size; | |
37 | ||
38 | switch (chcr) { | |
39 | case 0x01000201: //cpu to spu transfer | |
40 | #ifdef PSXDMA_LOG | |
41 | PSXDMA_LOG("*** DMA4 SPU - mem2spu *** %x addr = %x size = %x\n", chcr, madr, bcr); | |
42 | #endif | |
43 | ptr = (u16 *)PSXM(madr); | |
44 | if (ptr == NULL) { | |
45 | #ifdef CPU_LOG | |
46 | CPU_LOG("*** DMA4 SPU - mem2spu *** NULL Pointer!!!\n"); | |
47 | #endif | |
48 | break; | |
49 | } | |
50 | SPU_writeDMAMem(ptr, (bcr >> 16) * (bcr & 0xffff) * 2); | |
51 | SPUDMA_INT((bcr >> 16) * (bcr & 0xffff) / 2); | |
52 | return; | |
53 | ||
54 | case 0x01000200: //spu to cpu transfer | |
55 | #ifdef PSXDMA_LOG | |
56 | PSXDMA_LOG("*** DMA4 SPU - spu2mem *** %x addr = %x size = %x\n", chcr, madr, bcr); | |
57 | #endif | |
58 | ptr = (u16 *)PSXM(madr); | |
59 | if (ptr == NULL) { | |
60 | #ifdef CPU_LOG | |
61 | CPU_LOG("*** DMA4 SPU - spu2mem *** NULL Pointer!!!\n"); | |
62 | #endif | |
63 | break; | |
64 | } | |
65 | size = (bcr >> 16) * (bcr & 0xffff) * 2; | |
66 | SPU_readDMAMem(ptr, size); | |
67 | psxCpu->Clear(madr, size); | |
68 | break; | |
69 | ||
70 | #ifdef PSXDMA_LOG | |
71 | default: | |
72 | PSXDMA_LOG("*** DMA4 SPU - unknown *** %x addr = %x size = %x\n", chcr, madr, bcr); | |
73 | break; | |
74 | #endif | |
75 | } | |
76 | ||
77 | HW_DMA4_CHCR &= SWAP32(~0x01000000); | |
78 | DMA_INTERRUPT(4); | |
79 | } | |
80 | ||
57a757ce | 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; | |
85 | ||
86 | if (laddr < lUsedAddr[0]) lUsedAddr[1] = laddr; | |
87 | else lUsedAddr[2] = laddr; | |
88 | ||
89 | lUsedAddr[0] = laddr; | |
90 | ||
91 | return FALSE; | |
92 | } | |
93 | ||
94 | static u32 gpuDmaChainSize(u32 addr) { | |
95 | u32 size; | |
96 | u32 DMACommandCounter = 0; | |
97 | u32 lUsedAddr[3]; | |
98 | ||
99 | lUsedAddr[0] = lUsedAddr[1] = lUsedAddr[2] = 0xffffff; | |
100 | ||
101 | // initial linked list ptr (word) | |
102 | size = 1; | |
103 | ||
104 | do { | |
105 | addr &= 0x1ffffc; | |
106 | ||
107 | if (DMACommandCounter++ > 2000000) break; | |
108 | if (CheckForEndlessLoop(addr, lUsedAddr)) break; | |
109 | ||
110 | // # 32-bit blocks to transfer | |
111 | size += psxMu8( addr + 3 ); | |
112 | ||
113 | // next 32-bit pointer | |
114 | addr = psxMu32( addr & ~0x3 ) & 0xffffff; | |
115 | size += 1; | |
116 | } while (addr != 0xffffff); | |
117 | ||
118 | return size; | |
119 | } | |
120 | ||
ef79bbde P |
121 | void psxDma2(u32 madr, u32 bcr, u32 chcr) { // GPU |
122 | u32 *ptr; | |
123 | u32 size; | |
124 | ||
57a757ce | 125 | switch (chcr) { |
ef79bbde P |
126 | case 0x01000200: // vram2mem |
127 | #ifdef PSXDMA_LOG | |
57a757ce | 128 | PSXDMA_LOG("*** DMA2 GPU - vram2mem *** %lx addr = %lx size = %lx\n", chcr, madr, bcr); |
ef79bbde P |
129 | #endif |
130 | ptr = (u32 *)PSXM(madr); | |
131 | if (ptr == NULL) { | |
132 | #ifdef CPU_LOG | |
133 | CPU_LOG("*** DMA2 GPU - vram2mem *** NULL Pointer!!!\n"); | |
134 | #endif | |
135 | break; | |
136 | } | |
57a757ce | 137 | // BA blocks * BS words (word = 32-bits) |
ef79bbde P |
138 | size = (bcr >> 16) * (bcr & 0xffff); |
139 | GPU_readDataMem(ptr, size); | |
140 | psxCpu->Clear(madr, size); | |
57a757ce | 141 | |
142 | // already 32-bit word size ((size * 4) / 4) | |
143 | GPUDMA_INT(size); | |
144 | return; | |
ef79bbde P |
145 | |
146 | case 0x01000201: // mem2vram | |
147 | #ifdef PSXDMA_LOG | |
57a757ce | 148 | PSXDMA_LOG("*** DMA 2 - GPU mem2vram *** %lx addr = %lx size = %lx\n", chcr, madr, bcr); |
ef79bbde P |
149 | #endif |
150 | ptr = (u32 *)PSXM(madr); | |
151 | if (ptr == NULL) { | |
152 | #ifdef CPU_LOG | |
153 | CPU_LOG("*** DMA2 GPU - mem2vram *** NULL Pointer!!!\n"); | |
154 | #endif | |
155 | break; | |
156 | } | |
57a757ce | 157 | // BA blocks * BS words (word = 32-bits) |
ef79bbde P |
158 | size = (bcr >> 16) * (bcr & 0xffff); |
159 | GPU_writeDataMem(ptr, size); | |
57a757ce | 160 | |
161 | // already 32-bit word size ((size * 4) / 4) | |
162 | GPUDMA_INT(size); | |
ef79bbde P |
163 | return; |
164 | ||
165 | case 0x01000401: // dma chain | |
166 | #ifdef PSXDMA_LOG | |
57a757ce | 167 | PSXDMA_LOG("*** DMA 2 - GPU dma chain *** %lx addr = %lx size = %lx\n", chcr, madr, bcr); |
ef79bbde | 168 | #endif |
57a757ce | 169 | |
170 | size = gpuDmaChainSize(madr); | |
ef79bbde | 171 | GPU_dmaChain((u32 *)psxM, madr & 0x1fffff); |
57a757ce | 172 | |
173 | // Tekken 3 = use 1.0 only (not 1.5x) | |
174 | ||
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) | |
179 | GPUDMA_INT(size); | |
180 | return; | |
ef79bbde P |
181 | |
182 | #ifdef PSXDMA_LOG | |
183 | default: | |
57a757ce | 184 | PSXDMA_LOG("*** DMA 2 - GPU unknown *** %lx addr = %lx size = %lx\n", chcr, madr, bcr); |
ef79bbde P |
185 | break; |
186 | #endif | |
187 | } | |
188 | ||
189 | HW_DMA2_CHCR &= SWAP32(~0x01000000); | |
190 | DMA_INTERRUPT(2); | |
191 | } | |
192 | ||
193 | void gpuInterrupt() { | |
194 | HW_DMA2_CHCR &= SWAP32(~0x01000000); | |
195 | DMA_INTERRUPT(2); | |
196 | } | |
197 | ||
198 | void psxDma6(u32 madr, u32 bcr, u32 chcr) { | |
57a757ce | 199 | u32 size; |
ef79bbde P |
200 | u32 *mem = (u32 *)PSXM(madr); |
201 | ||
202 | #ifdef PSXDMA_LOG | |
203 | PSXDMA_LOG("*** DMA6 OT *** %x addr = %x size = %x\n", chcr, madr, bcr); | |
204 | #endif | |
205 | ||
206 | if (chcr == 0x11000002) { | |
207 | if (mem == NULL) { | |
208 | #ifdef CPU_LOG | |
209 | CPU_LOG("*** DMA6 OT *** NULL Pointer!!!\n"); | |
210 | #endif | |
211 | HW_DMA6_CHCR &= SWAP32(~0x01000000); | |
212 | DMA_INTERRUPT(6); | |
213 | return; | |
214 | } | |
215 | ||
57a757ce | 216 | // already 32-bit size |
217 | size = bcr; | |
218 | ||
ef79bbde P |
219 | while (bcr--) { |
220 | *mem-- = SWAP32((madr - 4) & 0xffffff); | |
221 | madr -= 4; | |
222 | } | |
223 | mem++; *mem = 0xffffff; | |
57a757ce | 224 | |
225 | GPUOTCDMA_INT(size); | |
226 | return; | |
ef79bbde P |
227 | } |
228 | #ifdef PSXDMA_LOG | |
229 | else { | |
230 | // Unknown option | |
231 | PSXDMA_LOG("*** DMA6 OT - unknown *** %x addr = %x size = %x\n", chcr, madr, bcr); | |
232 | } | |
233 | #endif | |
234 | ||
235 | HW_DMA6_CHCR &= SWAP32(~0x01000000); | |
236 | DMA_INTERRUPT(6); | |
237 | } | |
238 | ||
57a757ce | 239 | void gpuotcInterrupt() |
240 | { | |
241 | HW_DMA6_CHCR &= SWAP32(~0x01000000); | |
242 | DMA_INTERRUPT(6); | |
243 | } |