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fixed deadlock
[picodrive.git] / Pico / Memory.s
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4ff2d527 1@ vim:filetype=armasm\r
2\r
cc68a136 3@ memory handlers with banking support for SSF II - The New Challengers\r
4@ mostly based on Gens code\r
5\r
6cadc2da 6@ (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas\r
cc68a136 7@ All Rights Reserved\r
8\r
9\r
e5503e2f 10.include "port_config.s"\r
cc68a136 11\r
12.text\r
13\r
14@ default jump tables\r
15\r
16m_read8_def_table:\r
17 .long m_read8_rom0 @ 0x000000 - 0x07FFFF\r
18 .long m_read8_rom1 @ 0x080000 - 0x0FFFFF\r
19 .long m_read8_rom2 @ 0x100000 - 0x17FFFF\r
20 .long m_read8_rom3 @ 0x180000 - 0x1FFFFF\r
21 .long m_read8_rom4 @ 0x200000 - 0x27FFFF\r
22 .long m_read8_rom5 @ 0x280000 - 0x2FFFFF\r
23 .long m_read8_rom6 @ 0x300000 - 0x37FFFF\r
24 .long m_read8_rom7 @ 0x380000 - 0x3FFFFF\r
29a95187 25 .long m_read8_rom8 @ 0x400000 - 0x47FFFF - for all those large ROM hacks\r
cc68a136 26 .long m_read8_rom9 @ 0x480000 - 0x4FFFFF\r
27 .long m_read8_romA @ 0x500000 - 0x57FFFF\r
28 .long m_read8_romB @ 0x580000 - 0x5FFFFF\r
29 .long m_read8_romC @ 0x600000 - 0x67FFFF\r
30 .long m_read8_romD @ 0x680000 - 0x6FFFFF\r
31 .long m_read8_romE @ 0x700000 - 0x77FFFF\r
32 .long m_read8_romF @ 0x780000 - 0x7FFFFF\r
29a95187 33 .long m_read8_rom10 @ 0x800000 - 0x87FFFF\r
34 .long m_read8_rom11 @ 0x880000 - 0x8FFFFF\r
35 .long m_read8_rom12 @ 0x900000 - 0x97FFFF\r
36 .long m_read8_rom13 @ 0x980000 - 0x9FFFFF\r
cc68a136 37 .long m_read8_misc @ 0xA00000 - 0xA7FFFF\r
38 .long m_read_null @ 0xA80000 - 0xAFFFFF\r
39 .long m_read_null @ 0xB00000 - 0xB7FFFF\r
40 .long m_read_null @ 0xB80000 - 0xBFFFFF\r
41 .long m_read8_vdp @ 0xC00000 - 0xC7FFFF\r
42 .long m_read8_vdp @ 0xC80000 - 0xCFFFFF\r
7969166e 43 .long m_read8_vdp @ 0xD00000 - 0xD7FFFF\r
44 .long m_read8_vdp @ 0xD80000 - 0xDFFFFF\r
cc68a136 45 .long m_read8_ram @ 0xE00000 - 0xE7FFFF\r
46 .long m_read8_ram @ 0xE80000 - 0xEFFFFF\r
47 .long m_read8_ram @ 0xF00000 - 0xF7FFFF\r
48 .long m_read8_ram @ 0xF80000 - 0xFFFFFF\r
49\r
50m_read16_def_table:\r
51 .long m_read16_rom0 @ 0x000000 - 0x07FFFF\r
52 .long m_read16_rom1 @ 0x080000 - 0x0FFFFF\r
53 .long m_read16_rom2 @ 0x100000 - 0x17FFFF\r
54 .long m_read16_rom3 @ 0x180000 - 0x1FFFFF\r
55 .long m_read16_rom4 @ 0x200000 - 0x27FFFF\r
56 .long m_read16_rom5 @ 0x280000 - 0x2FFFFF\r
57 .long m_read16_rom6 @ 0x300000 - 0x37FFFF\r
58 .long m_read16_rom7 @ 0x380000 - 0x3FFFFF\r
59 .long m_read16_rom8 @ 0x400000 - 0x47FFFF\r
60 .long m_read16_rom9 @ 0x480000 - 0x4FFFFF\r
61 .long m_read16_romA @ 0x500000 - 0x57FFFF\r
62 .long m_read16_romB @ 0x580000 - 0x5FFFFF\r
63 .long m_read16_romC @ 0x600000 - 0x67FFFF\r
64 .long m_read16_romD @ 0x680000 - 0x6FFFFF\r
65 .long m_read16_romE @ 0x700000 - 0x77FFFF\r
66 .long m_read16_romF @ 0x780000 - 0x7FFFFF\r
29a95187 67 .long m_read16_rom10 @ 0x800000 - 0x87FFFF\r
68 .long m_read16_rom11 @ 0x880000 - 0x8FFFFF\r
69 .long m_read16_rom12 @ 0x900000 - 0x97FFFF\r
70 .long m_read16_rom13 @ 0x980000 - 0x9FFFFF\r
cc68a136 71 .long m_read16_misc @ 0xA00000 - 0xA7FFFF\r
72 .long m_read_null @ 0xA80000 - 0xAFFFFF\r
73 .long m_read_null @ 0xB00000 - 0xB7FFFF\r
74 .long m_read_null @ 0xB80000 - 0xBFFFFF\r
75 .long m_read16_vdp @ 0xC00000 - 0xC7FFFF\r
7969166e 76 .long m_read16_vdp @ 0xC80000 - 0xCFFFFF\r
77 .long m_read16_vdp @ 0xD00000 - 0xD7FFFF\r
78 .long m_read16_vdp @ 0xD80000 - 0xDFFFFF\r
cc68a136 79 .long m_read16_ram @ 0xE00000 - 0xE7FFFF\r
80 .long m_read16_ram @ 0xE80000 - 0xEFFFFF\r
81 .long m_read16_ram @ 0xF00000 - 0xF7FFFF\r
82 .long m_read16_ram @ 0xF80000 - 0xFFFFFF\r
83\r
84m_read32_def_table:\r
85 .long m_read32_rom0 @ 0x000000 - 0x07FFFF\r
86 .long m_read32_rom1 @ 0x080000 - 0x0FFFFF\r
87 .long m_read32_rom2 @ 0x100000 - 0x17FFFF\r
88 .long m_read32_rom3 @ 0x180000 - 0x1FFFFF\r
89 .long m_read32_rom4 @ 0x200000 - 0x27FFFF\r
90 .long m_read32_rom5 @ 0x280000 - 0x2FFFFF\r
91 .long m_read32_rom6 @ 0x300000 - 0x37FFFF\r
92 .long m_read32_rom7 @ 0x380000 - 0x3FFFFF\r
93 .long m_read32_rom8 @ 0x400000 - 0x47FFFF\r
94 .long m_read32_rom9 @ 0x480000 - 0x4FFFFF\r
95 .long m_read32_romA @ 0x500000 - 0x57FFFF\r
96 .long m_read32_romB @ 0x580000 - 0x5FFFFF\r
97 .long m_read32_romC @ 0x600000 - 0x67FFFF\r
98 .long m_read32_romD @ 0x680000 - 0x6FFFFF\r
99 .long m_read32_romE @ 0x700000 - 0x77FFFF\r
100 .long m_read32_romF @ 0x780000 - 0x7FFFFF\r
29a95187 101 .long m_read32_rom10 @ 0x800000 - 0x87FFFF\r
102 .long m_read32_rom11 @ 0x880000 - 0x8FFFFF\r
103 .long m_read32_rom12 @ 0x900000 - 0x97FFFF\r
104 .long m_read32_rom13 @ 0x980000 - 0x9FFFFF\r
cc68a136 105 .long m_read32_misc @ 0xA00000 - 0xA7FFFF\r
106 .long m_read_null @ 0xA80000 - 0xAFFFFF\r
107 .long m_read_null @ 0xB00000 - 0xB7FFFF\r
108 .long m_read_null @ 0xB80000 - 0xBFFFFF\r
109 .long m_read32_vdp @ 0xC00000 - 0xC7FFFF\r
7969166e 110 .long m_read32_vdp @ 0xC80000 - 0xCFFFFF\r
111 .long m_read32_vdp @ 0xD00000 - 0xD7FFFF\r
112 .long m_read32_vdp @ 0xD80000 - 0xDFFFFF\r
cc68a136 113 .long m_read32_ram @ 0xE00000 - 0xE7FFFF\r
114 .long m_read32_ram @ 0xE80000 - 0xEFFFFF\r
115 .long m_read32_ram @ 0xF00000 - 0xF7FFFF\r
116 .long m_read32_ram @ 0xF80000 - 0xFFFFFF\r
117\r
118\r
119@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
120\r
121.bss\r
122@.section .bss, "brw"\r
123@.data\r
124\r
125@ used tables\r
126m_read8_table:\r
127 .skip 32*4\r
128\r
129m_read16_table:\r
130 .skip 32*4\r
131\r
132m_read32_table:\r
133 .skip 32*4\r
134\r
135\r
136@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
137\r
138.text\r
139\r
140.global PicoMemReset\r
141.global PicoRead8\r
142.global PicoRead16\r
143.global PicoRead32\r
e5503e2f 144.global PicoWrite8\r
cc68a136 145.global PicoWriteRomHW_SSF2\r
e5503e2f 146.global m_m68k_read8_misc\r
147.global m_m68k_write8_misc\r
cc68a136 148\r
149\r
150PicoMemReset:\r
151 ldr r12,=(Pico+0x22204)\r
152 ldr r12,[r12] @ romsize\r
153 add r12,r12,#0x80000\r
154 sub r12,r12,#1\r
155 mov r12,r12,lsr #19\r
156\r
157 ldr r0, =m_read8_table\r
158 ldr r1, =m_read8_def_table\r
159 mov r2, #32\r
1601:\r
161 ldr r3, [r1], #4\r
162 str r3, [r0], #4\r
163 subs r2, r2, #1\r
164 bne 1b\r
165\r
166 ldr r0, =m_read16_table\r
167 ldr r1, =m_read16_def_table\r
168 mov r2, #32\r
1691:\r
170 subs r2, r2, #1\r
171 ldr r3, [r1], #4\r
172 str r3, [r0], #4\r
173 bne 1b\r
174\r
175 ldr r0, =m_read32_table\r
176 ldr r1, =m_read32_def_table\r
177 mov r2, #32\r
1781:\r
179 subs r2, r2, #1\r
180 ldr r3, [r1], #4\r
181 str r3, [r0], #4\r
182 bne 1b\r
183\r
184 @ update memhandlers according to ROM size\r
185 ldr r1, =m_read8_above_rom\r
186 ldr r0, =m_read8_table\r
187 mov r2, #16\r
1881:\r
189 sub r2, r2, #1\r
190 cmp r2, r12\r
191 blt 2f\r
192 cmp r2, #4\r
193 beq 1b @ do not touch the SRAM area\r
194 str r1, [r0, r2, lsl #2]\r
195 b 1b\r
1962:\r
197 ldr r1, =m_read16_above_rom\r
198 ldr r0, =m_read16_table\r
199 mov r2, #16\r
2001:\r
201 sub r2, r2, #1\r
202 cmp r2, r12\r
203 blt 2f\r
204 cmp r2, #4\r
205 beq 1b\r
206 str r1, [r0, r2, lsl #2]\r
207 b 1b\r
2082:\r
209 ldr r1, =m_read32_above_rom\r
210 ldr r0, =m_read32_table\r
211 mov r2, #16\r
2121:\r
213 sub r2, r2, #1\r
214 cmp r2, r12\r
215 blt 2f\r
216 cmp r2, #4\r
217 beq 1b\r
218 str r1, [r0, r2, lsl #2]\r
219 b 1b\r
2202:\r
221 bx lr\r
222\r
223.pool\r
224\r
225@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
226\r
227PicoRead8: @ u32 a\r
228 ldr r2, =m_read8_table\r
229 bic r0, r0, #0xff000000\r
230 and r1, r0, #0x00f80000\r
231 ldr pc, [r2, r1, lsr #17]\r
232\r
233PicoRead16: @ u32 a\r
234 ldr r2, =m_read16_table\r
235 bic r0, r0, #0xff000000\r
236 and r1, r0, #0x00f80000\r
237 ldr pc, [r2, r1, lsr #17]\r
238\r
239PicoRead32: @ u32 a\r
240 ldr r2, =m_read32_table\r
241 bic r0, r0, #0xff000000\r
242 and r1, r0, #0x00f80000\r
243 ldr pc, [r2, r1, lsr #17]\r
244\r
245.pool\r
246\r
247@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
248\r
249m_read_null:\r
250 mov r0, #0\r
251 bx lr\r
252\r
253\r
254.macro m_read8_rom sect\r
255 ldr r1, =(Pico+0x22200)\r
256 bic r0, r0, #0xf80000\r
257 ldr r1, [r1]\r
258.if \sect\r
259 orr r0, r0, #0x080000*\sect\r
260.endif\r
261 eor r0, r0, #1\r
262 ldrb r0, [r1, r0]\r
263 bx lr\r
264.endm\r
265\r
266\r
267m_read8_rom0: @ 0x000000 - 0x07ffff\r
268 m_read8_rom 0\r
269\r
270m_read8_rom1: @ 0x080000 - 0x0fffff\r
271 m_read8_rom 1\r
272\r
273m_read8_rom2: @ 0x100000 - 0x17ffff\r
274 m_read8_rom 2\r
275\r
276m_read8_rom3: @ 0x180000 - 0x1fffff\r
277 m_read8_rom 3\r
278\r
279m_read8_rom4: @ 0x200000 - 0x27ffff, SRAM area\r
280 ldr r2, =(SRam)\r
281 ldr r3, =(Pico+0x22200)\r
282 ldr r1, [r2, #8] @ SRam.end\r
283 bic r0, r0, #0xf80000\r
284 orr r0, r0, #0x200000\r
285 cmp r0, r1\r
286 bgt m_read8_nosram\r
7969166e 287 ldr r1, [r2, #4] @ SRam.start\r
cc68a136 288 cmp r0, r1\r
289 blt m_read8_nosram\r
7969166e 290 ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r
291 tst r1, #5\r
292 bne SRAMRead\r
cc68a136 293m_read8_nosram:\r
7969166e 294 ldr r1, [r3, #4] @ romsize\r
cc68a136 295 cmp r0, r1\r
296 movgt r0, #0\r
297 bxgt lr @ bad location\r
298 ldr r1, [r3]\r
299 eor r0, r0, #1\r
300 ldrb r0, [r1, r0]\r
301 bx lr\r
302\r
303m_read8_rom5: @ 0x280000 - 0x2fffff\r
304 m_read8_rom 5\r
305\r
306m_read8_rom6: @ 0x300000 - 0x37ffff\r
307 m_read8_rom 6\r
308\r
309m_read8_rom7: @ 0x380000 - 0x3fffff\r
310 m_read8_rom 7\r
311\r
312m_read8_rom8: @ 0x400000 - 0x47ffff\r
313 m_read8_rom 8\r
314\r
315m_read8_rom9: @ 0x480000 - 0x4fffff\r
316 m_read8_rom 9\r
317\r
cc68a136 318m_read8_romA: @ 0x500000 - 0x57ffff\r
319 m_read8_rom 0xA\r
320\r
321m_read8_romB: @ 0x580000 - 0x5fffff\r
322 m_read8_rom 0xB\r
323\r
324m_read8_romC: @ 0x600000 - 0x67ffff\r
325 m_read8_rom 0xC\r
326\r
327m_read8_romD: @ 0x680000 - 0x6fffff\r
328 m_read8_rom 0xD\r
329\r
330m_read8_romE: @ 0x700000 - 0x77ffff\r
331 m_read8_rom 0xE\r
332\r
333m_read8_romF: @ 0x780000 - 0x7fffff\r
334 m_read8_rom 0xF\r
335\r
29a95187 336m_read8_rom10: @ 0x800000 - 0x87ffff\r
337 m_read8_rom 0x10\r
338\r
339m_read8_rom11: @ 0x880000 - 0x8fffff\r
340 m_read8_rom 0x11\r
341\r
342m_read8_rom12: @ 0x900000 - 0x97ffff\r
343 m_read8_rom 0x12\r
344\r
345m_read8_rom13: @ 0x980000 - 0x9fffff\r
346 m_read8_rom 0x13\r
347\r
e5503e2f 348\r
349m_m68k_read8_misc:\r
cc68a136 350m_read8_misc:\r
e5503e2f 351 bic r2, r0, #0x001f @ most commonly we get i/o port read,\r
352 cmp r2, #0xa10000 @ so check for it first\r
353 bne m_read8_misc2\r
354m_read8_misc_io:\r
355 ands r0, r0, #0x1e\r
356 beq m_read8_misc_hwreg\r
357 cmp r0, #4\r
e5503e2f 358 movlt r0, #0\r
359 moveq r0, #1\r
bf537655 360 ble PadRead\r
e5503e2f 361 ldr r3, =(Pico+0x22000)\r
362 mov r0, r0, lsr #1 @ other IO ports (Pico.ioports[a])\r
363 ldrb r0, [r3, r0]\r
364 bx lr\r
365\r
366m_read8_misc_hwreg:\r
367 ldr r3, =(Pico+0x22200)\r
368 ldrb r0, [r3, #0x0f] @ Pico.m.hardware\r
369 bx lr\r
370\r
371m_read8_misc2:\r
372 mov r2, #0xa10000 @ games also like to poll busreq,\r
373 orr r2, r2, #0x001100 @ so we'll try it now\r
374 cmp r0, r2\r
bf537655 375 beq z80ReadBusReq\r
e5503e2f 376\r
377 and r2, r0, #0xff0000 @ finally it might be\r
378 cmp r2, #0xa00000 @ z80 area\r
379 bne m_read8_misc3\r
380 tst r0, #0x4000\r
bf537655 381 beq z80Read8 @ z80 RAM\r
e5503e2f 382 and r2, r0, #0x6000\r
383 cmp r2, #0x4000\r
384 mvnne r0, #0\r
385 bxne lr @ invalid\r
386.if EXTERNAL_YM2612\r
387 ldr r1, =PicoOpt\r
388 ldr r1, [r1]\r
389 tst r1, #1\r
390 beq m_read8_fake_ym2612\r
391 tst r1, #0x200\r
bf537655 392 beq YM2612Read_\r
393 b YM2612Read_940\r
e5503e2f 394.else\r
bf537655 395 b YM2612Read_\r
e5503e2f 396.endif\r
e5503e2f 397\r
398m_read8_fake_ym2612:\r
399 ldr r3, =(Pico+0x22200)\r
400 ldrb r0, [r3, #8] @ Pico.m.rotate\r
401 add r1, r0, #1\r
402 strb r1, [r3, #8]\r
403 and r0, r0, #3\r
404 bx lr\r
405\r
406m_read8_misc3:\r
407 @ if everything else fails, use generic handler\r
cc68a136 408 stmfd sp!,{r0,lr}\r
409 bic r0, r0, #1\r
410 mov r1, #8\r
411 bl OtherRead16\r
412 ldmfd sp!,{r1,lr}\r
413 tst r1, #1\r
414 moveq r0, r0, lsr #8\r
415 bx lr\r
416\r
e5503e2f 417\r
cc68a136 418m_read8_vdp:\r
419 tst r0, #0x70000\r
420 tsteq r0, #0x000e0\r
421 bxne lr @ invalid read\r
422 stmfd sp!,{r0,lr}\r
423 bic r0, r0, #1\r
424 bl PicoVideoRead\r
425 ldmfd sp!,{r1,lr}\r
426 tst r1, #1\r
427 moveq r0, r0, lsr #8\r
428 bx lr\r
429\r
430m_read8_ram:\r
431 ldr r1, =Pico\r
432 bic r0, r0, #0xff0000\r
433 eor r0, r0, #1\r
434 ldrb r0, [r1, r0]\r
435 bx lr\r
436\r
437m_read8_above_rom:\r
438 stmfd sp!,{r0,lr}\r
439 bic r0, r0, #1\r
440 mov r1, #8\r
66fdc0f0 441 bl OtherRead16End\r
cc68a136 442 ldmfd sp!,{r1,lr}\r
443 tst r1, #1\r
444 moveq r0, r0, lsr #8\r
445 bx lr\r
446\r
447.pool\r
448\r
449@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
450\r
451.macro m_read16_rom sect\r
452 ldr r1, =(Pico+0x22200)\r
453 bic r0, r0, #0xf80000\r
454 ldr r1, [r1]\r
455 bic r0, r0, #1\r
456.if \sect\r
457 orr r0, r0, #0x080000*\sect\r
458.endif\r
459 ldrh r0, [r1, r0]\r
460 bx lr\r
461.endm\r
462\r
463\r
464m_read16_rom0: @ 0x000000 - 0x07ffff\r
465 m_read16_rom 0\r
466\r
467m_read16_rom1: @ 0x080000 - 0x0fffff\r
468 m_read16_rom 1\r
469\r
470m_read16_rom2: @ 0x100000 - 0x17ffff\r
471 m_read16_rom 2\r
472\r
473m_read16_rom3: @ 0x180000 - 0x1fffff\r
474 m_read16_rom 3\r
475\r
476m_read16_rom4: @ 0x200000 - 0x27ffff, SRAM area (NBA Live 95)\r
477 ldr r2, =(SRam)\r
478 ldr r3, =(Pico+0x22200)\r
479 ldr r1, [r2, #8] @ SRam.end\r
480 bic r0, r0, #0xf80000\r
481 bic r0, r0, #1\r
482 orr r0, r0, #0x200000\r
483 cmp r0, r1\r
484 bgt m_read16_nosram\r
7969166e 485 ldr r1, [r2, #4] @ SRam.start\r
cc68a136 486 cmp r0, r1\r
487 blt m_read16_nosram\r
7969166e 488 ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r
489 tst r1, #5\r
490 beq m_read16_nosram\r
491 stmfd sp!,{lr}\r
492 bl SRAMRead\r
493 orr r0, r0, r0, lsl #8\r
494 ldmfd sp!,{pc}\r
cc68a136 495m_read16_nosram:\r
7969166e 496 ldr r1, [r3, #4] @ romsize\r
cc68a136 497 cmp r0, r1\r
498 movgt r0, #0\r
499 bxgt lr @ bad location\r
500 ldr r1, [r3] @ 1ci\r
501 ldrh r0, [r1, r0]\r
502 bx lr\r
503\r
504m_read16_rom5: @ 0x280000 - 0x2fffff\r
505 m_read16_rom 5\r
506\r
507m_read16_rom6: @ 0x300000 - 0x37ffff\r
508 m_read16_rom 6\r
509\r
510m_read16_rom7: @ 0x380000 - 0x3fffff\r
511 m_read16_rom 7\r
512\r
513m_read16_rom8: @ 0x400000 - 0x47ffff\r
514 m_read16_rom 8\r
515\r
516m_read16_rom9: @ 0x480000 - 0x4fffff\r
517 m_read16_rom 9\r
518\r
cc68a136 519m_read16_romA: @ 0x500000 - 0x57ffff\r
520 m_read16_rom 0xA\r
521\r
522m_read16_romB: @ 0x580000 - 0x5fffff\r
523 m_read16_rom 0xB\r
524\r
525m_read16_romC: @ 0x600000 - 0x67ffff\r
526 m_read16_rom 0xC\r
527\r
528m_read16_romD: @ 0x680000 - 0x6fffff\r
529 m_read16_rom 0xD\r
530\r
531m_read16_romE: @ 0x700000 - 0x77ffff\r
532 m_read16_rom 0xE\r
533\r
534m_read16_romF: @ 0x780000 - 0x7fffff\r
535 m_read16_rom 0xF\r
536\r
29a95187 537m_read16_rom10: @ 0x800000 - 0x87ffff\r
538 m_read16_rom 0x10\r
539\r
540m_read16_rom11: @ 0x880000 - 0x8fffff\r
541 m_read16_rom 0x11\r
542\r
543m_read16_rom12: @ 0x900000 - 0x97ffff\r
544 m_read16_rom 0x12\r
545\r
546m_read16_rom13: @ 0x980000 - 0x9fffff\r
547 m_read16_rom 0x13\r
548\r
cc68a136 549m_read16_misc:\r
cc68a136 550 bic r0, r0, #1\r
4ff2d527 551 mov r1, #16\r
552 b OtherRead16\r
cc68a136 553\r
554m_read16_vdp:\r
7969166e 555 tst r0, #0x70000 @ if ((a&0xe700e0)==0xc00000)\r
cc68a136 556 tsteq r0, #0x000e0\r
557 bxne lr @ invalid read\r
cc68a136 558 bic r0, r0, #1\r
4ff2d527 559 b PicoVideoRead\r
cc68a136 560\r
561m_read16_ram:\r
562 ldr r1, =Pico\r
563 bic r0, r0, #0xff0000\r
564 bic r0, r0, #1\r
565 ldrh r0, [r1, r0]\r
566 bx lr\r
567\r
568m_read16_above_rom:\r
cc68a136 569 bic r0, r0, #1\r
4ff2d527 570 mov r1, #16\r
571 b OtherRead16End\r
cc68a136 572\r
573.pool\r
574\r
575@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
576\r
577.macro m_read32_rom sect\r
578 ldr r1, =(Pico+0x22200)\r
579 bic r0, r0, #0xf80000\r
580 ldr r1, [r1]\r
581 bic r0, r0, #1\r
582.if \sect\r
583 orr r0, r0, #0x080000*\sect\r
584.endif\r
585 ldrh r0, [r1, r0]!\r
586 ldrh r1, [r1, #2] @ 1ci\r
587 orr r0, r1, r0, lsl #16\r
588 bx lr\r
589.endm\r
590\r
591\r
592m_read32_rom0: @ 0x000000 - 0x07ffff\r
593 m_read32_rom 0\r
594\r
595m_read32_rom1: @ 0x080000 - 0x0fffff\r
596 m_read32_rom 1\r
597\r
598m_read32_rom2: @ 0x100000 - 0x17ffff\r
599 m_read32_rom 2\r
600\r
601m_read32_rom3: @ 0x180000 - 0x1fffff\r
602 m_read32_rom 3\r
603\r
604m_read32_rom4: @ 0x200000 - 0x27ffff, SRAM area (does any game do long reads?)\r
605 ldr r2, =(SRam)\r
606 ldr r3, =(Pico+0x22200)\r
607 ldr r1, [r2, #8] @ SRam.end\r
608 bic r0, r0, #0xf80000\r
609 bic r0, r0, #1\r
610 orr r0, r0, #0x200000\r
611 cmp r0, r1\r
612 bgt m_read32_nosram\r
7969166e 613 ldr r1, [r2, #4] @ SRam.start\r
cc68a136 614 cmp r0, r1\r
615 blt m_read32_nosram\r
7969166e 616 ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r
617 tst r1, #5\r
618 beq m_read32_nosram\r
619 stmfd sp!,{r0,lr}\r
620 bl SRAMRead\r
621 ldmfd sp!,{r1,lr}\r
622 stmfd sp!,{r0,lr}\r
623 add r0, r1, #2\r
624 bl SRAMRead\r
625 ldmfd sp!,{r1,lr}\r
626 orr r0, r1, r0, lsl #16\r
627 orr r0, r0, r0, lsl #8\r
cc68a136 628 bx lr\r
629m_read32_nosram:\r
7969166e 630 ldr r1, [r3, #4] @ romsize\r
cc68a136 631 cmp r0, r1\r
632 movgt r0, #0\r
633 bxgt lr @ bad location\r
634 ldr r1, [r3] @ (1ci)\r
635 ldrh r0, [r1, r0]!\r
636 ldrh r1, [r1, #2] @ (2ci)\r
637 orr r0, r1, r0, lsl #16\r
638 bx lr\r
639\r
640m_read32_rom5: @ 0x280000 - 0x2fffff\r
641 m_read32_rom 5\r
642\r
643m_read32_rom6: @ 0x300000 - 0x37ffff\r
644 m_read32_rom 6\r
645\r
646m_read32_rom7: @ 0x380000 - 0x3fffff\r
647 m_read32_rom 7\r
648\r
649m_read32_rom8: @ 0x400000 - 0x47ffff\r
650 m_read32_rom 8\r
651\r
652m_read32_rom9: @ 0x480000 - 0x4fffff\r
653 m_read32_rom 9\r
654\r
cc68a136 655m_read32_romA: @ 0x500000 - 0x57ffff\r
656 m_read32_rom 0xA\r
657\r
658m_read32_romB: @ 0x580000 - 0x5fffff\r
659 m_read32_rom 0xB\r
660\r
661m_read32_romC: @ 0x600000 - 0x67ffff\r
662 m_read32_rom 0xC\r
663\r
664m_read32_romD: @ 0x680000 - 0x6fffff\r
665 m_read32_rom 0xD\r
666\r
667m_read32_romE: @ 0x700000 - 0x77ffff\r
668 m_read32_rom 0xE\r
669\r
670m_read32_romF: @ 0x780000 - 0x7fffff\r
671 m_read32_rom 0xF\r
672\r
29a95187 673m_read32_rom10: @ 0x800000 - 0x87ffff\r
674 m_read32_rom 0x10\r
675\r
676m_read32_rom11: @ 0x880000 - 0x8fffff\r
677 m_read32_rom 0x11\r
678\r
679m_read32_rom12: @ 0x900000 - 0x97ffff\r
680 m_read32_rom 0x12\r
681\r
682m_read32_rom13: @ 0x980000 - 0x9fffff\r
683 m_read32_rom 0x13\r
684\r
cc68a136 685m_read32_misc:\r
686 bic r0, r0, #1\r
687 stmfd sp!,{r0,lr}\r
688 mov r1, #32\r
689 bl OtherRead16\r
690 mov r1, r0\r
691 ldmfd sp!,{r0}\r
692 stmfd sp!,{r1}\r
693 add r0, r0, #2\r
694 mov r1, #32\r
695 bl OtherRead16\r
696 ldmfd sp!,{r1,lr}\r
697 orr r0, r0, r1, lsl #16\r
698 bx lr\r
699\r
700m_read32_vdp:\r
701 tst r0, #0x70000\r
702 tsteq r0, #0x000e0\r
703 bxne lr @ invalid read\r
704 bic r0, r0, #1\r
4ff2d527 705 add r1, r0, #2\r
706 stmfd sp!,{r1,lr}\r
cc68a136 707 bl PicoVideoRead\r
4ff2d527 708 swp r0, r0, [sp]\r
cc68a136 709 bl PicoVideoRead\r
710 ldmfd sp!,{r1,lr}\r
711 orr r0, r0, r1, lsl #16\r
712 bx lr\r
713\r
714m_read32_ram:\r
715 ldr r1, =Pico\r
716 bic r0, r0, #0xff0000\r
717 bic r0, r0, #1\r
718 ldrh r0, [r1, r0]!\r
719 ldrh r1, [r1, #2] @ 2ci\r
720 orr r0, r1, r0, lsl #16\r
721 bx lr\r
722\r
723m_read32_above_rom:\r
724 bic r0, r0, #1\r
725 stmfd sp!,{r0,lr}\r
726 mov r1, #32\r
66fdc0f0 727 bl OtherRead16End\r
cc68a136 728 mov r1, r0\r
729 ldmfd sp!,{r0}\r
730 stmfd sp!,{r1}\r
731 add r0, r0, #2\r
732 mov r1, #32\r
66fdc0f0 733 bl OtherRead16End\r
cc68a136 734 ldmfd sp!,{r1,lr}\r
735 orr r0, r0, r1, lsl #16\r
736 bx lr\r
737\r
738.pool\r
739\r
740@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
741\r
742PicoWriteRomHW_SSF2: @ u32 a, u32 d\r
743 and r0, r0, #0xe\r
744 movs r0, r0, lsr #1\r
745 bne pwr_banking\r
746\r
747 @ sram register\r
748 ldr r2, =(Pico+0x22211) @ Pico.m.sram_reg\r
721cd396 749 ldrb r0, [r2]\r
cc68a136 750 and r1, r1, #3\r
721cd396 751 bic r0, r0, #3\r
752 orr r0, r0, r1\r
753 strb r0, [r2]\r
cc68a136 754 bx lr\r
755\r
756pwr_banking:\r
757 and r1, r1, #0x1f\r
758\r
759 ldr r3, =m_read8_def_table\r
760 ldr r2, =m_read8_table\r
761 ldr r12, [r3, r1, lsl #2]\r
762 str r12, [r2, r0, lsl #2]\r
763\r
764 ldr r3, =m_read16_def_table\r
765 ldr r2, =m_read16_table\r
766 ldr r12, [r3, r1, lsl #2]\r
767 str r12, [r2, r0, lsl #2]\r
768\r
769 ldr r3, =m_read32_def_table\r
770 ldr r2, =m_read32_table\r
771 ldr r12, [r3, r1, lsl #2]\r
772 str r12, [r2, r0, lsl #2]\r
773 \r
774 bx lr\r
721cd396 775\r
e5503e2f 776@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
777\r
778@ Here we only handle most often used locations,\r
779@ everything else is passed to generic handlers\r
780\r
781PicoWrite8: @ u32 a, u8 d\r
782 bic r0, r0, #0xff000000\r
783 and r2, r0, #0x00e00000\r
784 cmp r2, #0x00e00000 @ RAM?\r
785 ldr r3, =Pico\r
786 biceq r0, r0, #0x00ff0000\r
787 eoreq r0, r0, #1\r
788 streqb r1, [r3, r0]\r
789 bxeq lr\r
790\r
791m_m68k_write8_misc:\r
792 bic r2, r0, #0x1f @ most commonly we get i/o port write,\r
793 cmp r2, #0xa10000 @ so check for it first\r
794 bne m_write8_misc2\r
795m_write8_io:\r
796 ldr r2, =PicoOpt\r
797 and r0, r0, #0x1e\r
798 ldr r2, [r2]\r
799 ldr r3, =(Pico+0x22000) @ Pico.ioports\r
800 tst r2, #0x20 @ 6 button pad?\r
801 streqb r1, [r3, r0, lsr #1]\r
802 bxeq lr\r
803 cmp r0, #2\r
804 cmpne r0, #4\r
805 bne m_write8_io_done @ not likely to happen\r
806 add r2, r3, #0x200 @ Pico+0x22200\r
807 mov r12,#0\r
808 cmp r0, #2\r
809 streqb r12,[r2,#0x18]\r
810 strneb r12,[r2,#0x19] @ Pico.m.padDelay[i] = 0\r
811 tst r1, #0x40 @ TH\r
812 beq m_write8_io_done\r
813 ldrb r12,[r3, r0, lsr #1]\r
814 tst r12,#0x40\r
815 bne m_write8_io_done\r
816 cmp r0, #2\r
817 ldreqb r12,[r2,#0x0a]\r
818 ldrneb r12,[r2,#0x0b] @ Pico.m.padTHPhase\r
819 add r12,r12,#1\r
820 streqb r12,[r2,#0x0a]\r
821 strneb r12,[r2,#0x0b] @ Pico.m.padTHPhase\r
822m_write8_io_done:\r
823 strb r1, [r3, r0, lsr #1]\r
824 bx lr\r
825\r
826\r
827m_write8_misc2:\r
828 and r2, r0, #0xff0000\r
829 cmp r2, #0xa00000 @ z80 area?\r
830 bne m_write8_not_z80\r
831 tst r0, #0x4000\r
832 bne m_write8_z80_not_ram\r
833 ldr r3, =(Pico+0x20000) @ Pico.zram\r
834 add r2, r3, #0x02200 @ Pico+0x22200\r
835 ldrb r2, [r2, #9] @ Pico.m.z80Run\r
836 bic r0, r0, #0xff0000\r
837 bic r0, r0, #0x00e000\r
838 tst r2, #1\r
839 streqb r1, [r3, r0] @ zram\r
840 bx lr\r
841\r
842m_write8_z80_not_ram:\r
843 and r2, r0, #0x6000\r
844 cmp r2, #0x4000\r
845 bne m_write8_z80_not_ym2612\r
846 ldr r2, =PicoOpt\r
847 and r0, r0, #3\r
848 ldr r2, [r2]\r
849 tst r2, #1\r
850 bxeq lr\r
851 stmfd sp!,{lr}\r
852.if EXTERNAL_YM2612\r
853 tst r2, #0x200\r
854 ldreq r2, =YM2612Write_\r
855 ldrne r2, =YM2612Write_940\r
856 mov lr, pc\r
857 bx r2\r
858.else\r
859 bl YM2612Write_\r
860.endif\r
861 ldr r2, =emustatus\r
862 ldmfd sp!,{lr}\r
863 ldr r1, [r2]\r
864 orr r1, r0, r2\r
865 str r1, [r2] @ emustatus|=YM2612Write(a&3, d);\r
866 bx lr\r
867\r
868m_write8_z80_not_ym2612: @ not too likely\r
869 mov r2, r0, lsl #17\r
870 bic r2, r2, #6<<17\r
871 mov r3, #0x7f00\r
872 orr r3, r3, #0x0011\r
873 cmp r3, r2, lsr #17 @ psg @ z80 area?\r
874 beq m_write8_psg\r
875 and r2, r0, #0x7f00\r
876 cmp r2, #0x6000 @ bank register?\r
877 bxne lr @ invalid write\r
878\r
879m_write8_z80_bank_reg:\r
880 ldr r3, =(Pico+0x22208) @ Pico.m\r
881 ldrh r2, [r3, #0x0a]\r
882 mov r1, r1, lsr #8\r
883 orr r2, r1, r2, lsr #1\r
884 bic r2, r2, #0xfe00\r
885 strh r2, [r3, #0x0a]\r
886 bx lr\r
887\r
888\r
889m_write8_not_z80:\r
890 and r2, r0, #0xe70000\r
891 cmp r2, #0xc00000 @ VDP area?\r
bf537655 892 bne OtherWrite8 @ passthrough\r
e5503e2f 893 and r2, r0, #0xf9\r
894 cmp r2, #0x11\r
bf537655 895 bne OtherWrite8\r
e5503e2f 896m_write8_psg:\r
897 ldr r2, =PicoOpt\r
898 mov r0, r1\r
899 ldr r2, [r2]\r
900 tst r2, #2\r
901 bxeq lr\r
bf537655 902 b SN76496Write\r
e5503e2f 903\r
fast MegaDrive/MegaCD/32X emulator