83ff19ec |
1 | /* |
cff531af |
2 | * PicoDrive |
65514d85 |
3 | * (C) notaz, 2009,2010,2013 |
cff531af |
4 | * |
5 | * This work is licensed under the terms of MAME license. |
6 | * See COPYING file in the top-level directory. |
7 | * |
83ff19ec |
8 | * Register map: |
9 | * a15100 F....... R.....EA F.....AC N...VHMP 4000 // Fm Ren nrEs Aden Cart heN V H cMd Pwm |
10 | * a15102 ........ ......SM ? 4002 // intS intM |
11 | * a15104 ........ ......10 ........ hhhhhhhh 4004 // bk1 bk0 Hint |
7eaa3812 |
12 | * a15106 ........ F....SDR UE...... .....SDR 4006 // Full 68S Dma Rv fUll[fb] Empt[fb] |
83ff19ec |
13 | * a15108 (32bit DREQ src) 4008 |
14 | * a1510c (32bit DREQ dst) 400c |
15 | * a15110 llllllll llllll00 4010 // DREQ Len |
16 | * a15112 (16bit FIFO reg) 4012 |
7eaa3812 |
17 | * a15114 0 (16bit VRES clr) 4014 |
18 | * a15116 0 (16bit Vint clr) 4016 |
19 | * a15118 0 (16bit Hint clr) 4018 |
20 | * a1511a .......? .......C (16bit CMD clr) 401a // TV Cm |
21 | * a1511c 0 (16bit PWM clr) 401c |
22 | * a1511e 0 ? 401e |
83ff19ec |
23 | * a15120 (16 bytes comm) 2020 |
24 | * a15130 (PWM) 2030 |
65514d85 |
25 | * |
26 | * SH2 addr lines: |
27 | * iii. .cc. ..xx * // Internal, Cs, x |
28 | * |
29 | * sh2 map, wait/bus cycles (from docs): |
30 | * r w |
31 | * rom 0000000-0003fff 1 - |
32 | * sys reg 0004000-00040ff 1 1 |
33 | * vdp reg 0004100-00041ff 5 5 |
34 | * vdp pal 0004200-00043ff 5 5 |
8a847c12 |
35 | * cart 2000000-23fffff 6-15 |
65514d85 |
36 | * dram/fb 4000000-401ffff 5-12 1-3 |
37 | * fb ovr 4020000-403ffff |
38 | * sdram 6000000-603ffff 12 2 (cycles) |
39 | * d.a. c0000000-? |
83ff19ec |
40 | */ |
be2c4208 |
41 | #include "../pico_int.h" |
42 | #include "../memory.h" |
f4bb5d6b |
43 | #include "../../cpu/sh2/compiler.h" |
be2c4208 |
44 | |
45 | static const char str_mars[] = "MARS"; |
46 | |
83ff19ec |
47 | void *p32x_bios_g, *p32x_bios_m, *p32x_bios_s; |
974fdb5b |
48 | struct Pico32xMem *Pico32xMem; |
49 | |
5e49c3a8 |
50 | static void bank_switch(int b); |
51 | |
7eaa3812 |
52 | // addressing byte in 16bit reg |
53 | #define REG8IN16(ptr, offs) ((u8 *)ptr)[(offs) ^ 1] |
54 | |
266c6afa |
55 | // poll detection |
19886062 |
56 | #define POLL_THRESHOLD 3 |
4ea707e1 |
57 | |
19886062 |
58 | static struct { |
59 | u32 addr, cycles; |
60 | int cnt; |
61 | } m68k_poll; |
266c6afa |
62 | |
19886062 |
63 | static int m68k_poll_detect(u32 a, u32 cycles, u32 flags) |
266c6afa |
64 | { |
19886062 |
65 | int ret = 0; |
66 | |
67 | if (a - 2 <= m68k_poll.addr && m68k_poll.addr <= a + 2 |
68 | && cycles - m68k_poll.cycles <= 64) |
69 | { |
70 | if (m68k_poll.cnt++ > POLL_THRESHOLD) { |
71 | if (!(Pico32x.emu_flags & flags)) { |
72 | elprintf(EL_32X, "m68k poll addr %08x, cyc %u", |
73 | a, cycles - m68k_poll.cycles); |
266c6afa |
74 | ret = 1; |
75 | } |
19886062 |
76 | Pico32x.emu_flags |= flags; |
266c6afa |
77 | } |
78 | } |
c987bb5c |
79 | else { |
19886062 |
80 | m68k_poll.cnt = 0; |
81 | m68k_poll.addr = a; |
c987bb5c |
82 | } |
19886062 |
83 | m68k_poll.cycles = cycles; |
266c6afa |
84 | |
85 | return ret; |
86 | } |
87 | |
19886062 |
88 | void p32x_m68k_poll_event(u32 flags) |
89 | { |
90 | if (Pico32x.emu_flags & flags) { |
91 | elprintf(EL_32X, "m68k poll %02x -> %02x", Pico32x.emu_flags, |
92 | Pico32x.emu_flags & ~flags); |
93 | Pico32x.emu_flags &= ~flags; |
94 | SekSetStop(0); |
95 | } |
96 | m68k_poll.addr = m68k_poll.cnt = 0; |
97 | } |
98 | |
4a1fb183 |
99 | static void sh2_poll_detect(SH2 *sh2, u32 a, u32 flags, int maxcnt) |
266c6afa |
100 | { |
19886062 |
101 | int cycles_left = sh2_cycles_left(sh2); |
102 | |
103 | if (a == sh2->poll_addr && sh2->poll_cycles - cycles_left <= 10) { |
4a1fb183 |
104 | if (sh2->poll_cnt++ > maxcnt) { |
19886062 |
105 | if (!(sh2->state & flags)) |
f8675e28 |
106 | elprintf_sh2(sh2, EL_32X, "state: %02x->%02x", |
19886062 |
107 | sh2->state, sh2->state | flags); |
108 | |
109 | sh2->state |= flags; |
110 | sh2_end_run(sh2, 1); |
111 | pevt_log_sh2(sh2, EVT_POLL_START); |
112 | return; |
113 | } |
114 | } |
be20816c |
115 | else |
19886062 |
116 | sh2->poll_cnt = 0; |
117 | sh2->poll_addr = a; |
118 | sh2->poll_cycles = cycles_left; |
119 | } |
120 | |
121 | void p32x_sh2_poll_event(SH2 *sh2, u32 flags, u32 m68k_cycles) |
122 | { |
123 | if (sh2->state & flags) { |
f8675e28 |
124 | elprintf_sh2(sh2, EL_32X, "state: %02x->%02x", sh2->state, |
125 | sh2->state & ~flags); |
19886062 |
126 | |
127 | if (sh2->m68krcycles_done < m68k_cycles) |
128 | sh2->m68krcycles_done = m68k_cycles; |
129 | |
130 | pevt_log_sh2_o(sh2, EVT_POLL_END); |
be20816c |
131 | } |
19886062 |
132 | |
133 | sh2->state &= ~flags; |
134 | sh2->poll_addr = sh2->poll_cycles = sh2->poll_cnt = 0; |
266c6afa |
135 | } |
136 | |
19886062 |
137 | static void sh2s_sync_on_read(SH2 *sh2) |
4ea707e1 |
138 | { |
19886062 |
139 | int cycles; |
140 | if (sh2->poll_cnt != 0) |
141 | return; |
142 | |
143 | cycles = sh2_cycles_done(sh2); |
144 | if (cycles > 600) |
145 | p32x_sync_other_sh2(sh2, sh2->m68krcycles_done + cycles / 3); |
4ea707e1 |
146 | } |
147 | |
974fdb5b |
148 | // SH2 faking |
b78efee2 |
149 | //#define FAKE_SH2 |
acd35d4c |
150 | #ifdef FAKE_SH2 |
27e26273 |
151 | static int p32x_csum_faked; |
974fdb5b |
152 | static const u16 comm_fakevals[] = { |
153 | 0x4d5f, 0x4f4b, // M_OK |
154 | 0x535f, 0x4f4b, // S_OK |
5e49c3a8 |
155 | 0x4D41, 0x5346, // MASF - Brutal Unleashed |
156 | 0x5331, 0x4d31, // Darxide |
157 | 0x5332, 0x4d32, |
158 | 0x5333, 0x4d33, |
159 | 0x0000, 0x0000, // eq for doom |
974fdb5b |
160 | 0x0002, // Mortal Kombat |
acd35d4c |
161 | // 0, // pad |
be2c4208 |
162 | }; |
acd35d4c |
163 | |
164 | static u32 sh2_comm_faker(u32 a) |
165 | { |
166 | static int f = 0; |
167 | if (a == 0x28 && !p32x_csum_faked) { |
168 | p32x_csum_faked = 1; |
169 | return *(unsigned short *)(Pico.rom + 0x18e); |
170 | } |
171 | if (f >= sizeof(comm_fakevals) / sizeof(comm_fakevals[0])) |
172 | f = 0; |
173 | return comm_fakevals[f++]; |
174 | } |
175 | #endif |
be2c4208 |
176 | |
4ea707e1 |
177 | // ------------------------------------------------------------------ |
b78efee2 |
178 | // 68k regs |
4ea707e1 |
179 | |
be2c4208 |
180 | static u32 p32x_reg_read16(u32 a) |
181 | { |
182 | a &= 0x3e; |
183 | |
3cf9570b |
184 | #if 0 |
974fdb5b |
185 | if ((a & 0x30) == 0x20) |
acd35d4c |
186 | return sh2_comm_faker(a); |
266c6afa |
187 | #else |
5fadfb1c |
188 | if ((a & 0x30) == 0x20) { |
5fadfb1c |
189 | static u32 dr2 = 0; |
a8fd6e37 |
190 | unsigned int cycles = SekCyclesDoneT(); |
191 | int comreg = 1 << (a & 0x0f) / 2; |
192 | |
193 | // evil X-Men proto polls in a dbra loop and expects it to expire.. |
5fadfb1c |
194 | if (SekDar(2) != dr2) |
195 | m68k_poll.cnt = 0; |
196 | dr2 = SekDar(2); |
197 | |
419973a6 |
198 | if (cycles - msh2.m68krcycles_done > 244 |
199 | || (Pico32x.comm_dirty_68k & comreg)) |
a8fd6e37 |
200 | p32x_sync_sh2s(cycles); |
419973a6 |
201 | |
a8fd6e37 |
202 | if (Pico32x.comm_dirty_sh2 & comreg) |
203 | Pico32x.comm_dirty_sh2 &= ~comreg; |
19886062 |
204 | else if (m68k_poll_detect(a, cycles, P32XF_68KCPOLL)) { |
5fadfb1c |
205 | SekSetStop(1); |
3e5b912c |
206 | SekEndRun(16); |
5fadfb1c |
207 | } |
208 | dr2 = SekDar(2); |
a8fd6e37 |
209 | goto out; |
266c6afa |
210 | } |
acd35d4c |
211 | #endif |
87accdf7 |
212 | |
a8fd6e37 |
213 | if (a == 2) { // INTM, INTS |
214 | unsigned int cycles = SekCyclesDoneT(); |
215 | if (cycles - msh2.m68krcycles_done > 64) |
216 | p32x_sync_sh2s(cycles); |
9e1fa0a6 |
217 | goto out; |
a8fd6e37 |
218 | } |
219 | |
db1d3564 |
220 | if ((a & 0x30) == 0x30) |
c1931173 |
221 | return p32x_pwm_read16(a, NULL, SekCyclesDoneT()); |
974fdb5b |
222 | |
a8fd6e37 |
223 | out: |
be2c4208 |
224 | return Pico32x.regs[a / 2]; |
225 | } |
226 | |
7eaa3812 |
227 | static void dreq0_write(u16 *r, u32 d) |
228 | { |
229 | if (!(r[6 / 2] & P32XS_68S)) { |
230 | elprintf(EL_32X|EL_ANOMALY, "DREQ FIFO w16 without 68S?"); |
231 | return; // ignored - tested |
232 | } |
233 | if (Pico32x.dmac0_fifo_ptr < DMAC_FIFO_LEN) { |
234 | Pico32x.dmac_fifo[Pico32x.dmac0_fifo_ptr++] = d; |
235 | if (Pico32x.dmac0_fifo_ptr == DMAC_FIFO_LEN) |
236 | r[6 / 2] |= P32XS_FULL; |
237 | // tested: len register decrements and 68S clears |
238 | // even if SH2s/DMAC aren't active.. |
239 | r[0x10 / 2]--; |
240 | if (r[0x10 / 2] == 0) |
241 | r[6 / 2] &= ~P32XS_68S; |
242 | |
243 | if ((Pico32x.dmac0_fifo_ptr & 3) == 0) { |
244 | p32x_sync_sh2s(SekCyclesDoneT()); |
245 | p32x_dreq0_trigger(); |
246 | } |
247 | } |
248 | else |
249 | elprintf(EL_32X|EL_ANOMALY, "DREQ FIFO overflow!"); |
250 | } |
251 | |
252 | // writable bits tested |
be2c4208 |
253 | static void p32x_reg_write8(u32 a, u32 d) |
254 | { |
acd35d4c |
255 | u16 *r = Pico32x.regs; |
be2c4208 |
256 | a &= 0x3f; |
257 | |
97d3f47f |
258 | // for things like bset on comm port |
259 | m68k_poll.cnt = 0; |
260 | |
acd35d4c |
261 | switch (a) { |
7eaa3812 |
262 | case 0x00: // adapter ctl: FM writable |
263 | REG8IN16(r, 0x00) = d & 0x80; |
83ff19ec |
264 | return; |
7eaa3812 |
265 | case 0x01: // adapter ctl: RES and ADEN writable |
83ff19ec |
266 | if ((d ^ r[0]) & d & P32XS_nRES) |
267 | p32x_reset_sh2s(); |
7eaa3812 |
268 | REG8IN16(r, 0x01) &= ~(P32XS_nRES|P32XS_ADEN); |
269 | REG8IN16(r, 0x01) |= d & (P32XS_nRES|P32XS_ADEN); |
270 | return; |
271 | case 0x02: // ignored, always 0 |
1b3f5844 |
272 | return; |
7eaa3812 |
273 | case 0x03: // irq ctl |
9e1fa0a6 |
274 | if ((d ^ r[0x02 / 2]) & 3) { |
275 | int cycles = SekCyclesDoneT(); |
276 | p32x_sync_sh2s(cycles); |
277 | r[0x02 / 2] = d & 3; |
278 | p32x_update_cmd_irq(NULL, cycles); |
b78efee2 |
279 | } |
1b3f5844 |
280 | return; |
7eaa3812 |
281 | case 0x04: // ignored, always 0 |
282 | return; |
283 | case 0x05: // bank |
284 | d &= 3; |
285 | if (r[0x04 / 2] != d) { |
286 | r[0x04 / 2] = d; |
acd35d4c |
287 | bank_switch(d); |
288 | } |
1b3f5844 |
289 | return; |
7eaa3812 |
290 | case 0x06: // ignored, always 0 |
291 | return; |
292 | case 0x07: // DREQ ctl |
293 | REG8IN16(r, 0x07) &= ~(P32XS_68S|P32XS_DMA|P32XS_RV); |
294 | if (!(d & P32XS_68S)) { |
295 | Pico32x.dmac0_fifo_ptr = 0; |
296 | REG8IN16(r, 0x07) &= ~P32XS_FULL; |
297 | } |
298 | REG8IN16(r, 0x07) |= d & (P32XS_68S|P32XS_DMA|P32XS_RV); |
299 | return; |
300 | case 0x08: // ignored, always 0 |
301 | return; |
302 | case 0x09: // DREQ src |
303 | REG8IN16(r, 0x09) = d; |
304 | return; |
305 | case 0x0a: |
306 | REG8IN16(r, 0x0a) = d; |
307 | return; |
308 | case 0x0b: |
309 | REG8IN16(r, 0x0b) = d & 0xfe; |
310 | return; |
311 | case 0x0c: // ignored, always 0 |
312 | return; |
313 | case 0x0d: // DREQ dest |
314 | case 0x0e: |
315 | case 0x0f: |
316 | case 0x10: // DREQ len |
317 | REG8IN16(r, a) = d; |
318 | return; |
319 | case 0x11: |
320 | REG8IN16(r, a) = d & 0xfc; |
321 | return; |
322 | // DREQ FIFO - writes to odd addr go to fifo |
323 | // do writes to even work? Reads return 0 |
324 | case 0x12: |
325 | REG8IN16(r, a) = d; |
326 | return; |
327 | case 0x13: |
328 | d = (REG8IN16(r, 0x12) << 8) | (d & 0xff); |
329 | REG8IN16(r, 0x12) = 0; |
330 | dreq0_write(r, d); |
331 | return; |
332 | case 0x14: // ignored, always 0 |
333 | case 0x15: |
334 | case 0x16: |
335 | case 0x17: |
336 | case 0x18: |
337 | case 0x19: |
338 | return; |
339 | case 0x1a: // what's this? |
340 | elprintf(EL_32X|EL_ANOMALY, "mystery w8 %02x %02x", a, d); |
341 | REG8IN16(r, a) = d & 0x01; |
1b3f5844 |
342 | return; |
87accdf7 |
343 | case 0x1b: // TV |
7eaa3812 |
344 | REG8IN16(r, a) = d & 0x01; |
345 | return; |
346 | case 0x1c: // ignored, always 0 |
347 | case 0x1d: |
348 | case 0x1e: |
349 | case 0x1f: |
350 | case 0x30: |
351 | return; |
352 | case 0x31: // PWM control |
353 | REG8IN16(r, a) &= ~0x0f; |
354 | REG8IN16(r, a) |= d & 0x0f; |
77e58d93 |
355 | d = r[0x30 / 2]; |
7eaa3812 |
356 | goto pwm_write; |
357 | case 0x32: // PWM cycle |
358 | REG8IN16(r, a) = d & 0x0f; |
77e58d93 |
359 | d = r[0x32 / 2]; |
7eaa3812 |
360 | goto pwm_write; |
361 | case 0x33: |
362 | REG8IN16(r, a) = d; |
77e58d93 |
363 | d = r[0x32 / 2]; |
7eaa3812 |
364 | goto pwm_write; |
365 | // PWM pulse regs.. Only writes to odd address send a value |
366 | // to FIFO; reads are 0 (except status bits) |
367 | case 0x34: |
368 | case 0x36: |
369 | case 0x38: |
370 | REG8IN16(r, a) = d; |
371 | return; |
372 | case 0x35: |
373 | case 0x37: |
374 | case 0x39: |
77e58d93 |
375 | d = (REG8IN16(r, a ^ 1) << 8) | (d & 0xff); |
376 | REG8IN16(r, a ^ 1) = 0; |
7eaa3812 |
377 | goto pwm_write; |
378 | case 0x3a: // ignored, always 0 |
379 | case 0x3b: |
380 | case 0x3c: |
381 | case 0x3d: |
382 | case 0x3e: |
383 | case 0x3f: |
384 | return; |
385 | pwm_write: |
77e58d93 |
386 | p32x_pwm_write16(a & ~1, d, NULL, SekCyclesDoneT()); |
1b3f5844 |
387 | return; |
388 | } |
389 | |
390 | if ((a & 0x30) == 0x20) { |
a8fd6e37 |
391 | int cycles = SekCyclesDoneT(); |
392 | int comreg; |
393 | |
7eaa3812 |
394 | if (REG8IN16(r, a) == d) |
a8fd6e37 |
395 | return; |
19886062 |
396 | |
a8fd6e37 |
397 | comreg = 1 << (a & 0x0f) / 2; |
398 | if (Pico32x.comm_dirty_68k & comreg) |
399 | p32x_sync_sh2s(cycles); |
400 | |
7eaa3812 |
401 | REG8IN16(r, a) = d; |
19886062 |
402 | p32x_sh2_poll_event(&sh2s[0], SH2_STATE_CPOLL, cycles); |
403 | p32x_sh2_poll_event(&sh2s[1], SH2_STATE_CPOLL, cycles); |
a8fd6e37 |
404 | Pico32x.comm_dirty_68k |= comreg; |
405 | |
406 | if (cycles - (int)msh2.m68krcycles_done > 120) |
407 | p32x_sync_sh2s(cycles); |
1b3f5844 |
408 | return; |
5e49c3a8 |
409 | } |
410 | } |
411 | |
412 | static void p32x_reg_write16(u32 a, u32 d) |
413 | { |
acd35d4c |
414 | u16 *r = Pico32x.regs; |
415 | a &= 0x3e; |
416 | |
97d3f47f |
417 | // for things like bset on comm port |
418 | m68k_poll.cnt = 0; |
419 | |
acd35d4c |
420 | switch (a) { |
4ea707e1 |
421 | case 0x00: // adapter ctl |
83ff19ec |
422 | if ((d ^ r[0]) & d & P32XS_nRES) |
423 | p32x_reset_sh2s(); |
7eaa3812 |
424 | r[0] &= ~(P32XS_FM|P32XS_nRES|P32XS_ADEN); |
425 | r[0] |= d & (P32XS_FM|P32XS_nRES|P32XS_ADEN); |
426 | return; |
427 | case 0x08: // DREQ src |
428 | r[a / 2] = d & 0xff; |
429 | return; |
430 | case 0x0a: |
431 | r[a / 2] = d & ~1; |
432 | return; |
433 | case 0x0c: // DREQ dest |
434 | r[a / 2] = d & 0xff; |
435 | return; |
436 | case 0x0e: |
437 | r[a / 2] = d; |
acd35d4c |
438 | return; |
4ea707e1 |
439 | case 0x10: // DREQ len |
440 | r[a / 2] = d & ~3; |
441 | return; |
442 | case 0x12: // FIFO reg |
7eaa3812 |
443 | dreq0_write(r, d); |
444 | return; |
445 | case 0x1a: // TV + mystery bit |
446 | r[a / 2] = d & 0x0101; |
447 | return; |
77e58d93 |
448 | case 0x30: // PWM control |
449 | d = (r[a / 2] & ~0x0f) | (d & 0x0f); |
450 | r[a / 2] = d; |
451 | p32x_pwm_write16(a, d, NULL, SekCyclesDoneT()); |
452 | return; |
acd35d4c |
453 | } |
454 | |
4ea707e1 |
455 | // comm port |
7eaa3812 |
456 | if ((a & 0x30) == 0x20) { |
a8fd6e37 |
457 | int cycles = SekCyclesDoneT(); |
458 | int comreg; |
459 | |
460 | if (r[a / 2] == d) |
461 | return; |
462 | |
463 | comreg = 1 << (a & 0x0f) / 2; |
464 | if (Pico32x.comm_dirty_68k & comreg) |
465 | p32x_sync_sh2s(cycles); |
466 | |
acd35d4c |
467 | r[a / 2] = d; |
19886062 |
468 | p32x_sh2_poll_event(&sh2s[0], SH2_STATE_CPOLL, cycles); |
469 | p32x_sh2_poll_event(&sh2s[1], SH2_STATE_CPOLL, cycles); |
a8fd6e37 |
470 | Pico32x.comm_dirty_68k |= comreg; |
471 | |
472 | if (cycles - (int)msh2.m68krcycles_done > 120) |
473 | p32x_sync_sh2s(cycles); |
acd35d4c |
474 | return; |
475 | } |
db1d3564 |
476 | // PWM |
477 | else if ((a & 0x30) == 0x30) { |
c1931173 |
478 | p32x_pwm_write16(a, d, NULL, SekCyclesDoneT()); |
db1d3564 |
479 | return; |
480 | } |
acd35d4c |
481 | |
5e49c3a8 |
482 | p32x_reg_write8(a + 1, d); |
be2c4208 |
483 | } |
484 | |
4ea707e1 |
485 | // ------------------------------------------------------------------ |
be2c4208 |
486 | // VDP regs |
487 | static u32 p32x_vdp_read16(u32 a) |
488 | { |
4a1fb183 |
489 | u32 d; |
be2c4208 |
490 | a &= 0x0e; |
491 | |
4a1fb183 |
492 | d = Pico32x.vdp_regs[a / 2]; |
493 | if (a == 0x0a) { |
494 | // tested: FEN seems to be randomly pulsing on hcnt 0x80-0xf0, |
495 | // most often at 0xb1-0xb5, even during vblank, |
496 | // what's the deal with that? |
497 | // we'll just fake it along with hblank for now |
498 | Pico32x.vdp_fbcr_fake++; |
499 | if (Pico32x.vdp_fbcr_fake & 4) |
500 | d |= P32XV_HBLK; |
501 | if ((Pico32x.vdp_fbcr_fake & 7) == 0) |
502 | d |= P32XV_nFEN; |
503 | } |
504 | return d; |
be2c4208 |
505 | } |
506 | |
be2c4208 |
507 | static void p32x_vdp_write8(u32 a, u32 d) |
508 | { |
974fdb5b |
509 | u16 *r = Pico32x.vdp_regs; |
be2c4208 |
510 | a &= 0x0f; |
511 | |
974fdb5b |
512 | // TODO: verify what's writeable |
be2c4208 |
513 | switch (a) { |
974fdb5b |
514 | case 0x01: |
5e49c3a8 |
515 | // priority inversion is handled in palette |
516 | if ((r[0] ^ d) & P32XV_PRI) |
517 | Pico32x.dirty_pal = 1; |
974fdb5b |
518 | r[0] = (r[0] & P32XV_nPAL) | (d & 0xff); |
be20816c |
519 | break; |
e51e5983 |
520 | case 0x03: // shift (for pp mode) |
521 | r[2 / 2] = d & 1; |
522 | break; |
be20816c |
523 | case 0x05: // fill len |
524 | r[4 / 2] = d & 0xff; |
974fdb5b |
525 | break; |
be2c4208 |
526 | case 0x0b: |
974fdb5b |
527 | d &= 1; |
528 | Pico32x.pending_fb = d; |
529 | // if we are blanking and FS bit is changing |
4ea707e1 |
530 | if (((r[0x0a/2] & P32XV_VBLK) || (r[0] & P32XV_Mx) == 0) && ((r[0x0a/2] ^ d) & P32XV_FS)) { |
b4db550e |
531 | r[0x0a/2] ^= P32XV_FS; |
5609d343 |
532 | Pico32xSwapDRAM(d ^ 1); |
266c6afa |
533 | elprintf(EL_32X, "VDP FS: %d", r[0x0a/2] & P32XV_FS); |
be2c4208 |
534 | } |
535 | break; |
536 | } |
537 | } |
538 | |
19886062 |
539 | static void p32x_vdp_write16(u32 a, u32 d, SH2 *sh2) |
974fdb5b |
540 | { |
be20816c |
541 | a &= 0x0e; |
542 | if (a == 6) { // fill start |
543 | Pico32x.vdp_regs[6 / 2] = d; |
544 | return; |
545 | } |
546 | if (a == 8) { // fill data |
547 | u16 *dram = Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1]; |
1b3f5844 |
548 | int len = Pico32x.vdp_regs[4 / 2] + 1; |
a8fd6e37 |
549 | int len1 = len; |
be20816c |
550 | a = Pico32x.vdp_regs[6 / 2]; |
a8fd6e37 |
551 | while (len1--) { |
be20816c |
552 | dram[a] = d; |
553 | a = (a & 0xff00) | ((a + 1) & 0xff); |
554 | } |
a8fd6e37 |
555 | Pico32x.vdp_regs[0x06 / 2] = a; |
556 | Pico32x.vdp_regs[0x08 / 2] = d; |
19886062 |
557 | if (sh2 != NULL && len > 4) { |
a8fd6e37 |
558 | Pico32x.vdp_regs[0x0a / 2] |= P32XV_nFEN; |
19886062 |
559 | // supposedly takes 3 bus/6 sh2 cycles? or 3 sh2 cycles? |
560 | p32x_event_schedule_sh2(sh2, P32X_EVENT_FILLEND, 3 + len); |
a8fd6e37 |
561 | } |
be20816c |
562 | return; |
563 | } |
564 | |
974fdb5b |
565 | p32x_vdp_write8(a | 1, d); |
566 | } |
567 | |
4ea707e1 |
568 | // ------------------------------------------------------------------ |
acd35d4c |
569 | // SH2 regs |
b78efee2 |
570 | |
f81107f5 |
571 | static u32 p32x_sh2reg_read16(u32 a, SH2 *sh2) |
acd35d4c |
572 | { |
4ea707e1 |
573 | u16 *r = Pico32x.regs; |
eb35ce15 |
574 | a &= 0x3e; |
266c6afa |
575 | |
4ea707e1 |
576 | switch (a) { |
577 | case 0x00: // adapter/irq ctl |
f81107f5 |
578 | return (r[0] & P32XS_FM) | Pico32x.sh2_regs[0] |
579 | | Pico32x.sh2irq_mask[sh2->is_slave]; |
c987bb5c |
580 | case 0x04: // H count (often as comm too) |
4a1fb183 |
581 | sh2_poll_detect(sh2, a, SH2_STATE_CPOLL, 3); |
f81107f5 |
582 | sh2s_sync_on_read(sh2); |
87accdf7 |
583 | return Pico32x.sh2_regs[4 / 2]; |
7eaa3812 |
584 | case 0x06: |
585 | return (r[a / 2] & ~P32XS_FULL) | 0x4000; |
586 | case 0x08: // DREQ src |
587 | case 0x0a: |
588 | case 0x0c: // DREQ dst |
589 | case 0x0e: |
4ea707e1 |
590 | case 0x10: // DREQ len |
591 | return r[a / 2]; |
7eaa3812 |
592 | case 0x12: // DREQ FIFO - does this work on hw? |
593 | if (Pico32x.dmac0_fifo_ptr > 0) { |
594 | Pico32x.dmac0_fifo_ptr--; |
595 | r[a / 2] = Pico32x.dmac_fifo[0]; |
596 | memmove(&Pico32x.dmac_fifo[0], &Pico32x.dmac_fifo[1], |
597 | Pico32x.dmac0_fifo_ptr * 2); |
598 | } |
599 | return r[a / 2]; |
600 | case 0x14: |
601 | case 0x16: |
602 | case 0x18: |
603 | case 0x1a: |
604 | case 0x1c: |
605 | return 0; // ? |
acd35d4c |
606 | } |
4ea707e1 |
607 | |
db1d3564 |
608 | // comm port |
609 | if ((a & 0x30) == 0x20) { |
a8fd6e37 |
610 | int comreg = 1 << (a & 0x0f) / 2; |
611 | if (Pico32x.comm_dirty_68k & comreg) |
612 | Pico32x.comm_dirty_68k &= ~comreg; |
19886062 |
613 | else |
4a1fb183 |
614 | sh2_poll_detect(sh2, a, SH2_STATE_CPOLL, 3); |
f81107f5 |
615 | sh2s_sync_on_read(sh2); |
db1d3564 |
616 | return r[a / 2]; |
617 | } |
7eaa3812 |
618 | if ((a & 0x30) == 0x30) |
f81107f5 |
619 | return p32x_pwm_read16(a, sh2, sh2_cycles_done_m68k(sh2)); |
acd35d4c |
620 | |
7eaa3812 |
621 | elprintf_sh2(sh2, EL_32X|EL_ANOMALY, |
77e58d93 |
622 | "unhandled sysreg r16 [%02x] @%08x", a, sh2_pc(sh2)); |
acd35d4c |
623 | return 0; |
624 | } |
625 | |
f81107f5 |
626 | static void p32x_sh2reg_write8(u32 a, u32 d, SH2 *sh2) |
acd35d4c |
627 | { |
77e58d93 |
628 | u16 *r = Pico32x.regs; |
9e1fa0a6 |
629 | u32 old; |
19886062 |
630 | |
eb35ce15 |
631 | a &= 0x3f; |
f81107f5 |
632 | sh2->poll_addr = 0; |
19886062 |
633 | |
87accdf7 |
634 | switch (a) { |
77e58d93 |
635 | case 0x00: // FM |
636 | r[0] &= ~P32XS_FM; |
637 | r[0] |= (d << 8) & P32XS_FM; |
1b3f5844 |
638 | return; |
77e58d93 |
639 | case 0x01: // HEN/irq masks |
9e1fa0a6 |
640 | old = Pico32x.sh2irq_mask[sh2->is_slave]; |
641 | if ((d ^ old) & 1) |
642 | p32x_pwm_sync_to_sh2(sh2); |
643 | |
5ac99d9a |
644 | Pico32x.sh2irq_mask[sh2->is_slave] = d & 0x0f; |
87accdf7 |
645 | Pico32x.sh2_regs[0] &= ~0x80; |
646 | Pico32x.sh2_regs[0] |= d & 0x80; |
9e1fa0a6 |
647 | |
648 | if ((d ^ old) & 1) |
f81107f5 |
649 | p32x_pwm_schedule_sh2(sh2); |
9e1fa0a6 |
650 | if ((old ^ d) & 2) |
651 | p32x_update_cmd_irq(sh2, 0); |
652 | if ((old ^ d) & 4) |
5ac99d9a |
653 | p32x_schedule_hint(sh2, 0); |
1b3f5844 |
654 | return; |
77e58d93 |
655 | case 0x04: // ignored? |
656 | return; |
657 | case 0x05: // H count |
19886062 |
658 | d &= 0xff; |
659 | if (Pico32x.sh2_regs[4 / 2] != d) { |
660 | Pico32x.sh2_regs[4 / 2] = d; |
f81107f5 |
661 | p32x_sh2_poll_event(sh2->other_sh2, SH2_STATE_CPOLL, |
662 | sh2_cycles_done_m68k(sh2)); |
663 | sh2_end_run(sh2, 4); |
19886062 |
664 | } |
1b3f5844 |
665 | return; |
77e58d93 |
666 | case 0x30: |
667 | REG8IN16(r, a) = d & 0x0f; |
668 | d = r[0x30 / 2]; |
669 | goto pwm_write; |
670 | case 0x31: // PWM control |
671 | REG8IN16(r, a) = d & 0x8f; |
672 | d = r[0x30 / 2]; |
673 | goto pwm_write; |
674 | case 0x32: // PWM cycle |
675 | REG8IN16(r, a) = d & 0x0f; |
676 | d = r[0x32 / 2]; |
677 | goto pwm_write; |
678 | case 0x33: |
679 | REG8IN16(r, a) = d; |
680 | d = r[0x32 / 2]; |
681 | goto pwm_write; |
682 | // PWM pulse regs.. Only writes to odd address send a value |
683 | // to FIFO; reads are 0 (except status bits) |
684 | case 0x34: |
685 | case 0x36: |
686 | case 0x38: |
687 | REG8IN16(r, a) = d; |
688 | return; |
689 | case 0x35: |
690 | case 0x37: |
691 | case 0x39: |
692 | d = (REG8IN16(r, a ^ 1) << 8) | (d & 0xff); |
693 | REG8IN16(r, a ^ 1) = 0; |
694 | goto pwm_write; |
695 | case 0x3a: // ignored, always 0? |
696 | case 0x3b: |
697 | case 0x3c: |
698 | case 0x3d: |
699 | case 0x3e: |
700 | case 0x3f: |
701 | return; |
702 | pwm_write: |
703 | p32x_pwm_write16(a & ~1, d, sh2, 0); |
704 | return; |
1b3f5844 |
705 | } |
706 | |
707 | if ((a & 0x30) == 0x20) { |
a8fd6e37 |
708 | int comreg; |
77e58d93 |
709 | if (REG8IN16(r, a) == d) |
a8fd6e37 |
710 | return; |
711 | |
77e58d93 |
712 | REG8IN16(r, a) = d; |
19886062 |
713 | p32x_m68k_poll_event(P32XF_68KCPOLL); |
f81107f5 |
714 | p32x_sh2_poll_event(sh2->other_sh2, SH2_STATE_CPOLL, |
715 | sh2_cycles_done_m68k(sh2)); |
a8fd6e37 |
716 | comreg = 1 << (a & 0x0f) / 2; |
717 | Pico32x.comm_dirty_sh2 |= comreg; |
1b3f5844 |
718 | return; |
4ea707e1 |
719 | } |
77e58d93 |
720 | |
721 | elprintf(EL_32X|EL_ANOMALY, |
722 | "unhandled sysreg w8 [%02x] %02x @%08x", a, d, sh2_pc(sh2)); |
acd35d4c |
723 | } |
724 | |
f81107f5 |
725 | static void p32x_sh2reg_write16(u32 a, u32 d, SH2 *sh2) |
acd35d4c |
726 | { |
eb35ce15 |
727 | a &= 0x3e; |
acd35d4c |
728 | |
f81107f5 |
729 | sh2->poll_addr = 0; |
19886062 |
730 | |
db1d3564 |
731 | // comm |
a8fd6e37 |
732 | if ((a & 0x30) == 0x20) { |
733 | int comreg; |
734 | if (Pico32x.regs[a / 2] == d) |
735 | return; |
736 | |
b78efee2 |
737 | Pico32x.regs[a / 2] = d; |
19886062 |
738 | p32x_m68k_poll_event(P32XF_68KCPOLL); |
f81107f5 |
739 | p32x_sh2_poll_event(sh2->other_sh2, SH2_STATE_CPOLL, |
740 | sh2_cycles_done_m68k(sh2)); |
a8fd6e37 |
741 | comreg = 1 << (a & 0x0f) / 2; |
742 | Pico32x.comm_dirty_sh2 |= comreg; |
acd35d4c |
743 | return; |
744 | } |
db1d3564 |
745 | // PWM |
746 | else if ((a & 0x30) == 0x30) { |
f81107f5 |
747 | p32x_pwm_write16(a, d, sh2, sh2_cycles_done_m68k(sh2)); |
db1d3564 |
748 | return; |
749 | } |
acd35d4c |
750 | |
4ea707e1 |
751 | switch (a) { |
87accdf7 |
752 | case 0: // FM |
753 | Pico32x.regs[0] &= ~P32XS_FM; |
754 | Pico32x.regs[0] |= d & P32XS_FM; |
755 | break; |
9e1fa0a6 |
756 | case 0x14: |
757 | Pico32x.sh2irqs &= ~P32XI_VRES; |
758 | goto irls; |
759 | case 0x16: |
760 | Pico32x.sh2irqi[sh2->is_slave] &= ~P32XI_VINT; |
761 | goto irls; |
762 | case 0x18: |
763 | Pico32x.sh2irqi[sh2->is_slave] &= ~P32XI_HINT; |
764 | goto irls; |
765 | case 0x1a: |
766 | Pico32x.regs[2 / 2] &= ~(1 << sh2->is_slave); |
767 | p32x_update_cmd_irq(sh2, 0); |
768 | return; |
be20816c |
769 | case 0x1c: |
9e1fa0a6 |
770 | p32x_pwm_sync_to_sh2(sh2); |
771 | Pico32x.sh2irqi[sh2->is_slave] &= ~P32XI_PWM; |
f81107f5 |
772 | p32x_pwm_schedule_sh2(sh2); |
be20816c |
773 | goto irls; |
4ea707e1 |
774 | } |
775 | |
f81107f5 |
776 | p32x_sh2reg_write8(a | 1, d, sh2); |
4ea707e1 |
777 | return; |
778 | |
779 | irls: |
f81107f5 |
780 | p32x_update_irls(sh2, 0); |
4ea707e1 |
781 | } |
782 | |
4ea707e1 |
783 | // ------------------------------------------------------------------ |
34280f9b |
784 | // 32x 68k handlers |
83ff19ec |
785 | |
786 | // after ADEN |
787 | static u32 PicoRead8_32x_on(u32 a) |
be2c4208 |
788 | { |
789 | u32 d = 0; |
790 | if ((a & 0xffc0) == 0x5100) { // a15100 |
791 | d = p32x_reg_read16(a); |
792 | goto out_16to8; |
793 | } |
794 | |
83ff19ec |
795 | if ((a & 0xfc00) != 0x5000) |
796 | return PicoRead8_io(a); |
974fdb5b |
797 | |
798 | if ((a & 0xfff0) == 0x5180) { // a15180 |
be2c4208 |
799 | d = p32x_vdp_read16(a); |
800 | goto out_16to8; |
801 | } |
802 | |
974fdb5b |
803 | if ((a & 0xfe00) == 0x5200) { // a15200 |
804 | d = Pico32xMem->pal[(a & 0x1ff) / 2]; |
805 | goto out_16to8; |
806 | } |
807 | |
be2c4208 |
808 | if ((a & 0xfffc) == 0x30ec) { // a130ec |
809 | d = str_mars[a & 3]; |
810 | goto out; |
811 | } |
812 | |
813 | elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc); |
814 | return d; |
815 | |
816 | out_16to8: |
817 | if (a & 1) |
818 | d &= 0xff; |
819 | else |
820 | d >>= 8; |
821 | |
822 | out: |
823 | elprintf(EL_32X, "m68k 32x r8 [%06x] %02x @%06x", a, d, SekPc); |
824 | return d; |
825 | } |
826 | |
83ff19ec |
827 | static u32 PicoRead16_32x_on(u32 a) |
be2c4208 |
828 | { |
829 | u32 d = 0; |
830 | if ((a & 0xffc0) == 0x5100) { // a15100 |
831 | d = p32x_reg_read16(a); |
832 | goto out; |
833 | } |
834 | |
83ff19ec |
835 | if ((a & 0xfc00) != 0x5000) |
836 | return PicoRead16_io(a); |
974fdb5b |
837 | |
838 | if ((a & 0xfff0) == 0x5180) { // a15180 |
be2c4208 |
839 | d = p32x_vdp_read16(a); |
840 | goto out; |
841 | } |
842 | |
974fdb5b |
843 | if ((a & 0xfe00) == 0x5200) { // a15200 |
844 | d = Pico32xMem->pal[(a & 0x1ff) / 2]; |
845 | goto out; |
846 | } |
847 | |
be2c4208 |
848 | if ((a & 0xfffc) == 0x30ec) { // a130ec |
849 | d = !(a & 2) ? ('M'<<8)|'A' : ('R'<<8)|'S'; |
850 | goto out; |
851 | } |
852 | |
853 | elprintf(EL_UIO, "m68k unmapped r16 [%06x] @%06x", a, SekPc); |
854 | return d; |
855 | |
856 | out: |
857 | elprintf(EL_32X, "m68k 32x r16 [%06x] %04x @%06x", a, d, SekPc); |
858 | return d; |
859 | } |
860 | |
83ff19ec |
861 | static void PicoWrite8_32x_on(u32 a, u32 d) |
be2c4208 |
862 | { |
863 | if ((a & 0xfc00) == 0x5000) |
864 | elprintf(EL_32X, "m68k 32x w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
865 | |
866 | if ((a & 0xffc0) == 0x5100) { // a15100 |
867 | p32x_reg_write8(a, d); |
868 | return; |
869 | } |
870 | |
83ff19ec |
871 | if ((a & 0xfc00) != 0x5000) { |
872 | PicoWrite8_io(a, d); |
77e58d93 |
873 | if (a == 0xa130f1) |
874 | bank_switch(Pico32x.regs[4 / 2]); |
83ff19ec |
875 | return; |
876 | } |
974fdb5b |
877 | |
5609d343 |
878 | if (!(Pico32x.regs[0] & P32XS_FM)) { |
879 | if ((a & 0xfff0) == 0x5180) { // a15180 |
880 | p32x_vdp_write8(a, d); |
881 | return; |
882 | } |
be2c4208 |
883 | |
5609d343 |
884 | // TODO: verify |
885 | if ((a & 0xfe00) == 0x5200) { // a15200 |
886 | elprintf(EL_32X|EL_ANOMALY, "m68k 32x PAL w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
887 | ((u8 *)Pico32xMem->pal)[(a & 0x1ff) ^ 1] = d; |
888 | Pico32x.dirty_pal = 1; |
889 | return; |
890 | } |
974fdb5b |
891 | } |
892 | |
be2c4208 |
893 | elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
894 | } |
895 | |
83ff19ec |
896 | static void PicoWrite16_32x_on(u32 a, u32 d) |
be2c4208 |
897 | { |
898 | if ((a & 0xfc00) == 0x5000) |
553c3eaa |
899 | elprintf(EL_32X, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
be2c4208 |
900 | |
901 | if ((a & 0xffc0) == 0x5100) { // a15100 |
902 | p32x_reg_write16(a, d); |
903 | return; |
904 | } |
905 | |
83ff19ec |
906 | if ((a & 0xfc00) != 0x5000) { |
907 | PicoWrite16_io(a, d); |
77e58d93 |
908 | if (a == 0xa130f0) |
909 | bank_switch(Pico32x.regs[4 / 2]); |
83ff19ec |
910 | return; |
911 | } |
974fdb5b |
912 | |
5609d343 |
913 | if (!(Pico32x.regs[0] & P32XS_FM)) { |
914 | if ((a & 0xfff0) == 0x5180) { // a15180 |
915 | p32x_vdp_write16(a, d, NULL); // FIXME? |
916 | return; |
917 | } |
be2c4208 |
918 | |
5609d343 |
919 | if ((a & 0xfe00) == 0x5200) { // a15200 |
920 | Pico32xMem->pal[(a & 0x1ff) / 2] = d; |
921 | Pico32x.dirty_pal = 1; |
922 | return; |
923 | } |
974fdb5b |
924 | } |
925 | |
be2c4208 |
926 | elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
927 | } |
928 | |
83ff19ec |
929 | // before ADEN |
930 | u32 PicoRead8_32x(u32 a) |
931 | { |
932 | u32 d = 0; |
933 | if ((a & 0xffc0) == 0x5100) { // a15100 |
934 | // regs are always readable |
935 | d = ((u8 *)Pico32x.regs)[(a & 0x3f) ^ 1]; |
936 | goto out; |
937 | } |
938 | |
939 | if ((a & 0xfffc) == 0x30ec) { // a130ec |
940 | d = str_mars[a & 3]; |
941 | goto out; |
942 | } |
943 | |
944 | elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc); |
945 | return d; |
946 | |
947 | out: |
948 | elprintf(EL_32X, "m68k 32x r8 [%06x] %02x @%06x", a, d, SekPc); |
949 | return d; |
950 | } |
951 | |
952 | u32 PicoRead16_32x(u32 a) |
953 | { |
954 | u32 d = 0; |
955 | if ((a & 0xffc0) == 0x5100) { // a15100 |
956 | d = Pico32x.regs[(a & 0x3f) / 2]; |
957 | goto out; |
958 | } |
959 | |
960 | if ((a & 0xfffc) == 0x30ec) { // a130ec |
961 | d = !(a & 2) ? ('M'<<8)|'A' : ('R'<<8)|'S'; |
962 | goto out; |
963 | } |
964 | |
965 | elprintf(EL_UIO, "m68k unmapped r16 [%06x] @%06x", a, SekPc); |
966 | return d; |
967 | |
968 | out: |
969 | elprintf(EL_32X, "m68k 32x r16 [%06x] %04x @%06x", a, d, SekPc); |
970 | return d; |
971 | } |
972 | |
973 | void PicoWrite8_32x(u32 a, u32 d) |
974 | { |
975 | if ((a & 0xffc0) == 0x5100) { // a15100 |
976 | u16 *r = Pico32x.regs; |
977 | |
978 | elprintf(EL_32X, "m68k 32x w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
979 | a &= 0x3f; |
980 | if (a == 1) { |
981 | if ((d ^ r[0]) & d & P32XS_ADEN) { |
982 | Pico32xStartup(); |
983 | r[0] &= ~P32XS_nRES; // causes reset if specified by this write |
984 | r[0] |= P32XS_ADEN; |
985 | p32x_reg_write8(a, d); // forward for reset processing |
986 | } |
987 | return; |
988 | } |
989 | |
990 | // allow only COMM for now |
991 | if ((a & 0x30) == 0x20) { |
992 | u8 *r8 = (u8 *)r; |
993 | r8[a ^ 1] = d; |
994 | } |
995 | return; |
996 | } |
997 | |
998 | elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
999 | } |
1000 | |
1001 | void PicoWrite16_32x(u32 a, u32 d) |
1002 | { |
1003 | if ((a & 0xffc0) == 0x5100) { // a15100 |
1004 | u16 *r = Pico32x.regs; |
1005 | |
1006 | elprintf(EL_UIO, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
1007 | a &= 0x3e; |
1008 | if (a == 0) { |
1009 | if ((d ^ r[0]) & d & P32XS_ADEN) { |
1010 | Pico32xStartup(); |
1011 | r[0] &= ~P32XS_nRES; // causes reset if specified by this write |
1012 | r[0] |= P32XS_ADEN; |
1013 | p32x_reg_write16(a, d); // forward for reset processing |
1014 | } |
1015 | return; |
1016 | } |
1017 | |
1018 | // allow only COMM for now |
1019 | if ((a & 0x30) == 0x20) |
1020 | r[a / 2] = d; |
1021 | return; |
1022 | } |
1023 | |
1024 | elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
1025 | } |
1026 | |
34280f9b |
1027 | /* quirk: in both normal and overwrite areas only nonzero values go through */ |
1028 | #define sh2_write8_dramN(n) \ |
1029 | if ((d & 0xff) != 0) { \ |
1030 | u8 *dram = (u8 *)Pico32xMem->dram[n]; \ |
1031 | dram[(a & 0x1ffff) ^ 1] = d; \ |
1032 | } |
1033 | |
1034 | static void m68k_write8_dram0_ow(u32 a, u32 d) |
1035 | { |
1036 | sh2_write8_dramN(0); |
1037 | } |
1038 | |
1039 | static void m68k_write8_dram1_ow(u32 a, u32 d) |
1040 | { |
1041 | sh2_write8_dramN(1); |
1042 | } |
1043 | |
f81107f5 |
1044 | #define sh2_write16_dramN(n) \ |
34280f9b |
1045 | u16 *pd = &Pico32xMem->dram[n][(a & 0x1ffff) / 2]; \ |
1046 | if (!(a & 0x20000)) { \ |
1047 | *pd = d; \ |
f81107f5 |
1048 | return; \ |
34280f9b |
1049 | } \ |
1050 | /* overwrite */ \ |
1051 | if (!(d & 0xff00)) d |= *pd & 0xff00; \ |
1052 | if (!(d & 0x00ff)) d |= *pd & 0x00ff; \ |
f81107f5 |
1053 | *pd = d; |
34280f9b |
1054 | |
1055 | static void m68k_write16_dram0_ow(u32 a, u32 d) |
1056 | { |
f81107f5 |
1057 | sh2_write16_dramN(0); |
34280f9b |
1058 | } |
1059 | |
1060 | static void m68k_write16_dram1_ow(u32 a, u32 d) |
1061 | { |
f81107f5 |
1062 | sh2_write16_dramN(1); |
34280f9b |
1063 | } |
1064 | |
83ff19ec |
1065 | // ----------------------------------------------------------------- |
1066 | |
be2c4208 |
1067 | // hint vector is writeable |
1068 | static void PicoWrite8_hint(u32 a, u32 d) |
1069 | { |
1070 | if ((a & 0xfffc) == 0x0070) { |
1071 | Pico32xMem->m68k_rom[a ^ 1] = d; |
1072 | return; |
1073 | } |
1074 | |
77e58d93 |
1075 | elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", |
1076 | a, d & 0xff, SekPc); |
be2c4208 |
1077 | } |
1078 | |
1079 | static void PicoWrite16_hint(u32 a, u32 d) |
1080 | { |
1081 | if ((a & 0xfffc) == 0x0070) { |
1082 | ((u16 *)Pico32xMem->m68k_rom)[a/2] = d; |
1083 | return; |
1084 | } |
1085 | |
77e58d93 |
1086 | elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", |
1087 | a, d & 0xffff, SekPc); |
1088 | } |
1089 | |
1090 | // normally not writable, but somebody could make a RAM cart |
1091 | static void PicoWrite8_cart(u32 a, u32 d) |
1092 | { |
1093 | elprintf(EL_UIO, "m68k w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
1094 | |
1095 | a &= 0xfffff; |
1096 | m68k_write8(a, d); |
1097 | } |
1098 | |
1099 | static void PicoWrite16_cart(u32 a, u32 d) |
1100 | { |
1101 | elprintf(EL_UIO, "m68k w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
1102 | |
1103 | a &= 0xfffff; |
1104 | m68k_write16(a, d); |
1105 | } |
1106 | |
1107 | // same with bank, but save ram is sometimes here |
1108 | static u32 PicoRead8_bank(u32 a) |
1109 | { |
1110 | a = (Pico32x.regs[4 / 2] << 20) | (a & 0xfffff); |
1111 | return m68k_read8(a); |
1112 | } |
1113 | |
1114 | static u32 PicoRead16_bank(u32 a) |
1115 | { |
1116 | a = (Pico32x.regs[4 / 2] << 20) | (a & 0xfffff); |
1117 | return m68k_read16(a); |
1118 | } |
1119 | |
1120 | static void PicoWrite8_bank(u32 a, u32 d) |
1121 | { |
1122 | if (!(Pico.m.sram_reg & SRR_MAPPED)) |
1123 | elprintf(EL_UIO, "m68k w8 [%06x] %02x @%06x", |
1124 | a, d & 0xff, SekPc); |
1125 | |
1126 | a = (Pico32x.regs[4 / 2] << 20) | (a & 0xfffff); |
1127 | m68k_write8(a, d); |
1128 | } |
1129 | |
1130 | static void PicoWrite16_bank(u32 a, u32 d) |
1131 | { |
1132 | if (!(Pico.m.sram_reg & SRR_MAPPED)) |
1133 | elprintf(EL_UIO, "m68k w16 [%06x] %04x @%06x", |
1134 | a, d & 0xffff, SekPc); |
1135 | |
1136 | a = (Pico32x.regs[4 / 2] << 20) | (a & 0xfffff); |
1137 | m68k_write16(a, d); |
1138 | } |
1139 | |
1140 | static void bank_map_handler(void) |
1141 | { |
1142 | cpu68k_map_set(m68k_read8_map, 0x900000, 0x9fffff, PicoRead8_bank, 1); |
1143 | cpu68k_map_set(m68k_read16_map, 0x900000, 0x9fffff, PicoRead16_bank, 1); |
be2c4208 |
1144 | } |
1145 | |
5e49c3a8 |
1146 | static void bank_switch(int b) |
1147 | { |
1148 | unsigned int rs, bank; |
1149 | |
1150 | bank = b << 20; |
77e58d93 |
1151 | if ((Pico.m.sram_reg & SRR_MAPPED) && bank == SRam.start) { |
1152 | bank_map_handler(); |
1153 | return; |
1154 | } |
1155 | |
5e49c3a8 |
1156 | if (bank >= Pico.romsize) { |
1157 | elprintf(EL_32X|EL_ANOMALY, "missing bank @ %06x", bank); |
77e58d93 |
1158 | bank_map_handler(); |
5e49c3a8 |
1159 | return; |
1160 | } |
1161 | |
1162 | // 32X ROM (unbanked, XXX: consider mirroring?) |
1163 | rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK; |
1164 | rs -= bank; |
1165 | if (rs > 0x100000) |
1166 | rs = 0x100000; |
1167 | cpu68k_map_set(m68k_read8_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0); |
1168 | cpu68k_map_set(m68k_read16_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0); |
1169 | |
1170 | elprintf(EL_32X, "bank %06x-%06x -> %06x", 0x900000, 0x900000 + rs - 1, bank); |
602c28ca |
1171 | |
1172 | #ifdef EMU_F68K |
1173 | // setup FAME fetchmap |
1174 | for (rs = 0x90; rs < 0xa0; rs++) |
be26eb23 |
1175 | PicoCpuFM68k.Fetch[rs] = (unsigned long)Pico.rom + bank - 0x900000; |
602c28ca |
1176 | #endif |
5e49c3a8 |
1177 | } |
1178 | |
acd35d4c |
1179 | // ----------------------------------------------------------------- |
1180 | // SH2 |
1181 | // ----------------------------------------------------------------- |
1182 | |
bcf65fd6 |
1183 | // read8 |
f81107f5 |
1184 | static u32 sh2_read8_unmapped(u32 a, SH2 *sh2) |
acd35d4c |
1185 | { |
f8675e28 |
1186 | elprintf_sh2(sh2, EL_32X, "unmapped r8 [%08x] %02x @%06x", |
1187 | a, 0, sh2_pc(sh2)); |
bcf65fd6 |
1188 | return 0; |
1189 | } |
b78efee2 |
1190 | |
f81107f5 |
1191 | static u32 sh2_read8_cs0(u32 a, SH2 *sh2) |
bcf65fd6 |
1192 | { |
1193 | u32 d = 0; |
97d3f47f |
1194 | |
8a847c12 |
1195 | sh2_burn_cycles(sh2, 1*2); |
1196 | |
eb35ce15 |
1197 | // 0x3ffc0 is veridied |
1198 | if ((a & 0x3ffc0) == 0x4000) { |
f81107f5 |
1199 | d = p32x_sh2reg_read16(a, sh2); |
db1d3564 |
1200 | goto out_16to8; |
acd35d4c |
1201 | } |
1202 | |
eb35ce15 |
1203 | if ((a & 0x3fff0) == 0x4100) { |
acd35d4c |
1204 | d = p32x_vdp_read16(a); |
4a1fb183 |
1205 | sh2_poll_detect(sh2, a, SH2_STATE_VPOLL, 7); |
db1d3564 |
1206 | goto out_16to8; |
acd35d4c |
1207 | } |
1208 | |
bcf65fd6 |
1209 | // TODO: mirroring? |
f81107f5 |
1210 | if (!sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_m)) |
895d1512 |
1211 | return Pico32xMem->sh2_rom_m.b[a ^ 1]; |
f81107f5 |
1212 | if (sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_s)) |
895d1512 |
1213 | return Pico32xMem->sh2_rom_s.b[a ^ 1]; |
bcf65fd6 |
1214 | |
1f1ff763 |
1215 | if ((a & 0x3fe00) == 0x4200) { |
acd35d4c |
1216 | d = Pico32xMem->pal[(a & 0x1ff) / 2]; |
1217 | goto out_16to8; |
1218 | } |
1219 | |
f81107f5 |
1220 | return sh2_read8_unmapped(a, sh2); |
acd35d4c |
1221 | |
1222 | out_16to8: |
1223 | if (a & 1) |
1224 | d &= 0xff; |
1225 | else |
1226 | d >>= 8; |
1227 | |
f8675e28 |
1228 | elprintf_sh2(sh2, EL_32X, "r8 [%08x] %02x @%06x", |
1229 | a, d, sh2_pc(sh2)); |
acd35d4c |
1230 | return d; |
1231 | } |
1232 | |
f81107f5 |
1233 | static u32 sh2_read8_da(u32 a, SH2 *sh2) |
acd35d4c |
1234 | { |
f81107f5 |
1235 | return sh2->data_array[(a & 0xfff) ^ 1]; |
bcf65fd6 |
1236 | } |
acd35d4c |
1237 | |
bcf65fd6 |
1238 | // read16 |
f81107f5 |
1239 | static u32 sh2_read16_unmapped(u32 a, SH2 *sh2) |
bcf65fd6 |
1240 | { |
f8675e28 |
1241 | elprintf_sh2(sh2, EL_32X, "unmapped r16 [%08x] %04x @%06x", |
1242 | a, 0, sh2_pc(sh2)); |
bcf65fd6 |
1243 | return 0; |
1244 | } |
b78efee2 |
1245 | |
f81107f5 |
1246 | static u32 sh2_read16_cs0(u32 a, SH2 *sh2) |
bcf65fd6 |
1247 | { |
1248 | u32 d = 0; |
97d3f47f |
1249 | |
8a847c12 |
1250 | sh2_burn_cycles(sh2, 1*2); |
1251 | |
eb35ce15 |
1252 | if ((a & 0x3ffc0) == 0x4000) { |
f81107f5 |
1253 | d = p32x_sh2reg_read16(a, sh2); |
1b3f5844 |
1254 | if (!(EL_LOGMASK & EL_PWM) && (a & 0x30) == 0x30) // hide PWM |
1255 | return d; |
db1d3564 |
1256 | goto out; |
acd35d4c |
1257 | } |
1258 | |
eb35ce15 |
1259 | if ((a & 0x3fff0) == 0x4100) { |
acd35d4c |
1260 | d = p32x_vdp_read16(a); |
4a1fb183 |
1261 | sh2_poll_detect(sh2, a, SH2_STATE_VPOLL, 7); |
db1d3564 |
1262 | goto out; |
acd35d4c |
1263 | } |
1264 | |
f81107f5 |
1265 | if (!sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_m)) |
895d1512 |
1266 | return Pico32xMem->sh2_rom_m.w[a / 2]; |
f81107f5 |
1267 | if (sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_s)) |
895d1512 |
1268 | return Pico32xMem->sh2_rom_s.w[a / 2]; |
bcf65fd6 |
1269 | |
1f1ff763 |
1270 | if ((a & 0x3fe00) == 0x4200) { |
acd35d4c |
1271 | d = Pico32xMem->pal[(a & 0x1ff) / 2]; |
1272 | goto out; |
1273 | } |
1274 | |
f81107f5 |
1275 | return sh2_read16_unmapped(a, sh2); |
acd35d4c |
1276 | |
1277 | out: |
f8675e28 |
1278 | elprintf_sh2(sh2, EL_32X, "r16 [%08x] %04x @%06x", |
1279 | a, d, sh2_pc(sh2)); |
acd35d4c |
1280 | return d; |
1281 | } |
1282 | |
f81107f5 |
1283 | static u32 sh2_read16_da(u32 a, SH2 *sh2) |
acd35d4c |
1284 | { |
f81107f5 |
1285 | return ((u16 *)sh2->data_array)[(a & 0xfff) / 2]; |
acd35d4c |
1286 | } |
1287 | |
f81107f5 |
1288 | // writes |
1289 | static void REGPARM(3) sh2_write_ignore(u32 a, u32 d, SH2 *sh2) |
4b315c21 |
1290 | { |
1291 | } |
1292 | |
bcf65fd6 |
1293 | // write8 |
f81107f5 |
1294 | static void REGPARM(3) sh2_write8_unmapped(u32 a, u32 d, SH2 *sh2) |
acd35d4c |
1295 | { |
f8675e28 |
1296 | elprintf_sh2(sh2, EL_32X, "unmapped w8 [%08x] %02x @%06x", |
1297 | a, d & 0xff, sh2_pc(sh2)); |
bcf65fd6 |
1298 | } |
266c6afa |
1299 | |
f81107f5 |
1300 | static void REGPARM(3) sh2_write8_cs0(u32 a, u32 d, SH2 *sh2) |
bcf65fd6 |
1301 | { |
f8675e28 |
1302 | elprintf_sh2(sh2, EL_32X, "w8 [%08x] %02x @%06x", |
1303 | a, d & 0xff, sh2_pc(sh2)); |
b78efee2 |
1304 | |
5609d343 |
1305 | if (Pico32x.regs[0] & P32XS_FM) { |
eb35ce15 |
1306 | if ((a & 0x3fff0) == 0x4100) { |
f81107f5 |
1307 | sh2->poll_addr = 0; |
5609d343 |
1308 | p32x_vdp_write8(a, d); |
f81107f5 |
1309 | return; |
5609d343 |
1310 | } |
acd35d4c |
1311 | } |
1312 | |
eb35ce15 |
1313 | if ((a & 0x3ffc0) == 0x4000) { |
f81107f5 |
1314 | p32x_sh2reg_write8(a, d, sh2); |
1315 | return; |
acd35d4c |
1316 | } |
1317 | |
f81107f5 |
1318 | sh2_write8_unmapped(a, d, sh2); |
bcf65fd6 |
1319 | } |
1320 | |
f81107f5 |
1321 | static void REGPARM(3) sh2_write8_dram0(u32 a, u32 d, SH2 *sh2) |
bcf65fd6 |
1322 | { |
1323 | sh2_write8_dramN(0); |
acd35d4c |
1324 | } |
1325 | |
f81107f5 |
1326 | static void REGPARM(3) sh2_write8_dram1(u32 a, u32 d, SH2 *sh2) |
acd35d4c |
1327 | { |
bcf65fd6 |
1328 | sh2_write8_dramN(1); |
1329 | } |
87accdf7 |
1330 | |
f81107f5 |
1331 | static void REGPARM(3) sh2_write8_sdram(u32 a, u32 d, SH2 *sh2) |
f4bb5d6b |
1332 | { |
1333 | u32 a1 = a & 0x3ffff; |
1334 | #ifdef DRC_SH2 |
1335 | int t = Pico32xMem->drcblk_ram[a1 >> SH2_DRCBLK_RAM_SHIFT]; |
1336 | if (t) |
f81107f5 |
1337 | sh2_drc_wcheck_ram(a, t, sh2->is_slave); |
f4bb5d6b |
1338 | #endif |
1339 | Pico32xMem->sdram[a1 ^ 1] = d; |
1340 | } |
1341 | |
8a847c12 |
1342 | static void REGPARM(3) sh2_write8_sdram_wt(u32 a, u32 d, SH2 *sh2) |
1343 | { |
1344 | // xmen sync hack.. |
1345 | if (a < 0x26000200) |
1346 | sh2_end_run(sh2, 32); |
1347 | |
1348 | sh2_write8_sdram(a, d, sh2); |
1349 | } |
1350 | |
f81107f5 |
1351 | static void REGPARM(3) sh2_write8_da(u32 a, u32 d, SH2 *sh2) |
bcf65fd6 |
1352 | { |
f4bb5d6b |
1353 | u32 a1 = a & 0xfff; |
1354 | #ifdef DRC_SH2 |
f81107f5 |
1355 | int id = sh2->is_slave; |
f4bb5d6b |
1356 | int t = Pico32xMem->drcblk_da[id][a1 >> SH2_DRCBLK_DA_SHIFT]; |
1357 | if (t) |
1358 | sh2_drc_wcheck_da(a, t, id); |
1359 | #endif |
f81107f5 |
1360 | sh2->data_array[a1 ^ 1] = d; |
bcf65fd6 |
1361 | } |
acd35d4c |
1362 | |
bcf65fd6 |
1363 | // write16 |
f81107f5 |
1364 | static void REGPARM(3) sh2_write16_unmapped(u32 a, u32 d, SH2 *sh2) |
bcf65fd6 |
1365 | { |
f8675e28 |
1366 | elprintf_sh2(sh2, EL_32X, "unmapped w16 [%08x] %04x @%06x", |
1367 | a, d & 0xffff, sh2_pc(sh2)); |
bcf65fd6 |
1368 | } |
b78efee2 |
1369 | |
f81107f5 |
1370 | static void REGPARM(3) sh2_write16_cs0(u32 a, u32 d, SH2 *sh2) |
bcf65fd6 |
1371 | { |
1372 | if (((EL_LOGMASK & EL_PWM) || (a & 0x30) != 0x30)) // hide PWM |
f8675e28 |
1373 | elprintf_sh2(sh2, EL_32X, "w16 [%08x] %04x @%06x", |
1374 | a, d & 0xffff, sh2_pc(sh2)); |
266c6afa |
1375 | |
5609d343 |
1376 | if (Pico32x.regs[0] & P32XS_FM) { |
eb35ce15 |
1377 | if ((a & 0x3fff0) == 0x4100) { |
f81107f5 |
1378 | sh2->poll_addr = 0; |
1379 | p32x_vdp_write16(a, d, sh2); |
1380 | return; |
5609d343 |
1381 | } |
acd35d4c |
1382 | |
5609d343 |
1383 | if ((a & 0x3fe00) == 0x4200) { |
1384 | Pico32xMem->pal[(a & 0x1ff) / 2] = d; |
1385 | Pico32x.dirty_pal = 1; |
f81107f5 |
1386 | return; |
5609d343 |
1387 | } |
acd35d4c |
1388 | } |
1389 | |
eb35ce15 |
1390 | if ((a & 0x3ffc0) == 0x4000) { |
f81107f5 |
1391 | p32x_sh2reg_write16(a, d, sh2); |
1392 | return; |
acd35d4c |
1393 | } |
1394 | |
f81107f5 |
1395 | sh2_write16_unmapped(a, d, sh2); |
bcf65fd6 |
1396 | } |
1397 | |
f81107f5 |
1398 | static void REGPARM(3) sh2_write16_dram0(u32 a, u32 d, SH2 *sh2) |
bcf65fd6 |
1399 | { |
f81107f5 |
1400 | sh2_write16_dramN(0); |
bcf65fd6 |
1401 | } |
1402 | |
f81107f5 |
1403 | static void REGPARM(3) sh2_write16_dram1(u32 a, u32 d, SH2 *sh2) |
bcf65fd6 |
1404 | { |
f81107f5 |
1405 | sh2_write16_dramN(1); |
bcf65fd6 |
1406 | } |
1407 | |
f81107f5 |
1408 | static void REGPARM(3) sh2_write16_sdram(u32 a, u32 d, SH2 *sh2) |
f4bb5d6b |
1409 | { |
1410 | u32 a1 = a & 0x3ffff; |
1411 | #ifdef DRC_SH2 |
1412 | int t = Pico32xMem->drcblk_ram[a1 >> SH2_DRCBLK_RAM_SHIFT]; |
1413 | if (t) |
f81107f5 |
1414 | sh2_drc_wcheck_ram(a, t, sh2->is_slave); |
f4bb5d6b |
1415 | #endif |
1416 | ((u16 *)Pico32xMem->sdram)[a1 / 2] = d; |
1417 | } |
1418 | |
f81107f5 |
1419 | static void REGPARM(3) sh2_write16_da(u32 a, u32 d, SH2 *sh2) |
bcf65fd6 |
1420 | { |
f4bb5d6b |
1421 | u32 a1 = a & 0xfff; |
1422 | #ifdef DRC_SH2 |
f81107f5 |
1423 | int id = sh2->is_slave; |
f4bb5d6b |
1424 | int t = Pico32xMem->drcblk_da[id][a1 >> SH2_DRCBLK_DA_SHIFT]; |
1425 | if (t) |
1426 | sh2_drc_wcheck_da(a, t, id); |
1427 | #endif |
f81107f5 |
1428 | ((u16 *)sh2->data_array)[a1 / 2] = d; |
bcf65fd6 |
1429 | } |
1430 | |
1431 | |
f81107f5 |
1432 | typedef u32 (sh2_read_handler)(u32 a, SH2 *sh2); |
1433 | typedef void REGPARM(3) (sh2_write_handler)(u32 a, u32 d, SH2 *sh2); |
bcf65fd6 |
1434 | |
e05b81fc |
1435 | #define SH2MAP_ADDR2OFFS_R(a) \ |
f81107f5 |
1436 | ((u32)(a) >> SH2_READ_SHIFT) |
e05b81fc |
1437 | |
1438 | #define SH2MAP_ADDR2OFFS_W(a) \ |
1439 | ((u32)(a) >> SH2_WRITE_SHIFT) |
bcf65fd6 |
1440 | |
80599a42 |
1441 | u32 REGPARM(2) p32x_sh2_read8(u32 a, SH2 *sh2) |
bcf65fd6 |
1442 | { |
1443 | const sh2_memmap *sh2_map = sh2->read8_map; |
1444 | uptr p; |
1445 | |
e05b81fc |
1446 | sh2_map += SH2MAP_ADDR2OFFS_R(a); |
bcf65fd6 |
1447 | p = sh2_map->addr; |
b8a1c09a |
1448 | if (map_flag_set(p)) |
f81107f5 |
1449 | return ((sh2_read_handler *)(p << 1))(a, sh2); |
bcf65fd6 |
1450 | else |
1451 | return *(u8 *)((p << 1) + ((a & sh2_map->mask) ^ 1)); |
1452 | } |
1453 | |
80599a42 |
1454 | u32 REGPARM(2) p32x_sh2_read16(u32 a, SH2 *sh2) |
bcf65fd6 |
1455 | { |
1456 | const sh2_memmap *sh2_map = sh2->read16_map; |
1457 | uptr p; |
1458 | |
e05b81fc |
1459 | sh2_map += SH2MAP_ADDR2OFFS_R(a); |
bcf65fd6 |
1460 | p = sh2_map->addr; |
b8a1c09a |
1461 | if (map_flag_set(p)) |
f81107f5 |
1462 | return ((sh2_read_handler *)(p << 1))(a, sh2); |
bcf65fd6 |
1463 | else |
1464 | return *(u16 *)((p << 1) + ((a & sh2_map->mask) & ~1)); |
1465 | } |
1466 | |
80599a42 |
1467 | u32 REGPARM(2) p32x_sh2_read32(u32 a, SH2 *sh2) |
bcf65fd6 |
1468 | { |
1469 | const sh2_memmap *sh2_map = sh2->read16_map; |
1470 | sh2_read_handler *handler; |
1471 | u32 offs; |
1472 | uptr p; |
1473 | |
e05b81fc |
1474 | offs = SH2MAP_ADDR2OFFS_R(a); |
bcf65fd6 |
1475 | sh2_map += offs; |
1476 | p = sh2_map->addr; |
b8a1c09a |
1477 | if (!map_flag_set(p)) { |
bcf65fd6 |
1478 | // XXX: maybe 32bit access instead with ror? |
1479 | u16 *pd = (u16 *)((p << 1) + ((a & sh2_map->mask) & ~1)); |
1480 | return (pd[0] << 16) | pd[1]; |
1d7a28a7 |
1481 | } |
1482 | |
77e58d93 |
1483 | if (offs == SH2MAP_ADDR2OFFS_R(0xffffc000)) |
f81107f5 |
1484 | return sh2_peripheral_read32(a, sh2); |
bcf65fd6 |
1485 | |
1486 | handler = (sh2_read_handler *)(p << 1); |
f81107f5 |
1487 | return (handler(a, sh2) << 16) | handler(a + 2, sh2); |
bcf65fd6 |
1488 | } |
1489 | |
f81107f5 |
1490 | void REGPARM(3) p32x_sh2_write8(u32 a, u32 d, SH2 *sh2) |
bcf65fd6 |
1491 | { |
f4bb5d6b |
1492 | const void **sh2_wmap = sh2->write8_tab; |
1493 | sh2_write_handler *wh; |
bcf65fd6 |
1494 | |
e05b81fc |
1495 | wh = sh2_wmap[SH2MAP_ADDR2OFFS_W(a)]; |
f81107f5 |
1496 | wh(a, d, sh2); |
bcf65fd6 |
1497 | } |
1498 | |
f81107f5 |
1499 | void REGPARM(3) p32x_sh2_write16(u32 a, u32 d, SH2 *sh2) |
bcf65fd6 |
1500 | { |
f4bb5d6b |
1501 | const void **sh2_wmap = sh2->write16_tab; |
1502 | sh2_write_handler *wh; |
bcf65fd6 |
1503 | |
e05b81fc |
1504 | wh = sh2_wmap[SH2MAP_ADDR2OFFS_W(a)]; |
f81107f5 |
1505 | wh(a, d, sh2); |
acd35d4c |
1506 | } |
1507 | |
f81107f5 |
1508 | void REGPARM(3) p32x_sh2_write32(u32 a, u32 d, SH2 *sh2) |
acd35d4c |
1509 | { |
f4bb5d6b |
1510 | const void **sh2_wmap = sh2->write16_tab; |
f81107f5 |
1511 | sh2_write_handler *wh; |
bcf65fd6 |
1512 | u32 offs; |
bcf65fd6 |
1513 | |
e05b81fc |
1514 | offs = SH2MAP_ADDR2OFFS_W(a); |
bcf65fd6 |
1515 | |
e05b81fc |
1516 | if (offs == SH2MAP_ADDR2OFFS_W(0xffffc000)) { |
f81107f5 |
1517 | sh2_peripheral_write32(a, d, sh2); |
1518 | return; |
4ea707e1 |
1519 | } |
1520 | |
f81107f5 |
1521 | wh = sh2_wmap[offs]; |
1522 | wh(a, d >> 16, sh2); |
1523 | wh(a + 2, d, sh2); |
acd35d4c |
1524 | } |
1525 | |
bcf65fd6 |
1526 | // ----------------------------------------------------------------- |
1527 | |
419973a6 |
1528 | static void z80_md_bank_write_32x(unsigned int a, unsigned char d) |
1529 | { |
1530 | unsigned int addr68k; |
1531 | |
1532 | addr68k = Pico.m.z80_bank68k << 15; |
1533 | addr68k += a & 0x7fff; |
1534 | if ((addr68k & 0xfff000) == 0xa15000) |
1535 | Pico32x.emu_flags |= P32XF_Z80_32X_IO; |
1536 | |
1537 | elprintf(EL_Z80BNK, "z80->68k w8 [%06x] %02x", addr68k, d); |
1538 | m68k_write8(addr68k, d); |
1539 | } |
1540 | |
1541 | // ----------------------------------------------------------------- |
1542 | |
83ff19ec |
1543 | static const u16 msh2_code[] = { |
1544 | // trap instructions |
1545 | 0xaffe, // bra <self> |
1546 | 0x0009, // nop |
1547 | // have to wait a bit until m68k initial program finishes clearing stuff |
1548 | // to avoid races with game SH2 code, like in Tempo |
1549 | 0xd004, // mov.l @(_m_ok,pc), r0 |
1550 | 0xd105, // mov.l @(_cnt,pc), r1 |
1551 | 0xd205, // mov.l @(_start,pc), r2 |
1552 | 0x71ff, // add #-1, r1 |
1553 | 0x4115, // cmp/pl r1 |
1554 | 0x89fc, // bt -2 |
1555 | 0xc208, // mov.l r0, @(h'20,gbr) |
1556 | 0x6822, // mov.l @r2, r8 |
1557 | 0x482b, // jmp @r8 |
1558 | 0x0009, // nop |
1559 | ('M'<<8)|'_', ('O'<<8)|'K', |
1560 | 0x0001, 0x0000, |
1561 | 0x2200, 0x03e0 // master start pointer in ROM |
1562 | }; |
1563 | |
1564 | static const u16 ssh2_code[] = { |
1565 | 0xaffe, // bra <self> |
1566 | 0x0009, // nop |
1567 | // code to wait for master, in case authentic master BIOS is used |
1568 | 0xd104, // mov.l @(_m_ok,pc), r1 |
1569 | 0xd206, // mov.l @(_start,pc), r2 |
1570 | 0xc608, // mov.l @(h'20,gbr), r0 |
1571 | 0x3100, // cmp/eq r0, r1 |
1572 | 0x8bfc, // bf #-2 |
1573 | 0xd003, // mov.l @(_s_ok,pc), r0 |
1574 | 0xc209, // mov.l r0, @(h'24,gbr) |
1575 | 0x6822, // mov.l @r2, r8 |
1576 | 0x482b, // jmp @r8 |
1577 | 0x0009, // nop |
1578 | ('M'<<8)|'_', ('O'<<8)|'K', |
1579 | ('S'<<8)|'_', ('O'<<8)|'K', |
1580 | 0x2200, 0x03e4 // slave start pointer in ROM |
1581 | }; |
1582 | |
da77daa9 |
1583 | #define HWSWAP(x) (((u16)(x) << 16) | ((x) >> 16)) |
83ff19ec |
1584 | static void get_bios(void) |
be2c4208 |
1585 | { |
83ff19ec |
1586 | u16 *ps; |
1587 | u32 *pl; |
be2c4208 |
1588 | int i; |
1589 | |
83ff19ec |
1590 | // M68K ROM |
1591 | if (p32x_bios_g != NULL) { |
1592 | elprintf(EL_STATUS|EL_32X, "32x: using supplied 68k BIOS"); |
b4db550e |
1593 | Byteswap(Pico32xMem->m68k_rom, p32x_bios_g, sizeof(Pico32xMem->m68k_rom)); |
be2c4208 |
1594 | } |
83ff19ec |
1595 | else { |
1596 | // generate 68k ROM |
1597 | ps = (u16 *)Pico32xMem->m68k_rom; |
1598 | pl = (u32 *)ps; |
1599 | for (i = 1; i < 0xc0/4; i++) |
1600 | pl[i] = HWSWAP(0x880200 + (i - 1) * 6); |
be2c4208 |
1601 | |
83ff19ec |
1602 | // fill with nops |
1603 | for (i = 0xc0/2; i < 0x100/2; i++) |
1604 | ps[i] = 0x4e71; |
be2c4208 |
1605 | |
5e49c3a8 |
1606 | #if 0 |
83ff19ec |
1607 | ps[0xc0/2] = 0x46fc; |
1608 | ps[0xc2/2] = 0x2700; // move #0x2700,sr |
1609 | ps[0xfe/2] = 0x60fe; // jump to self |
5e49c3a8 |
1610 | #else |
83ff19ec |
1611 | ps[0xfe/2] = 0x4e75; // rts |
5e49c3a8 |
1612 | #endif |
83ff19ec |
1613 | } |
1614 | // fill remaining m68k_rom page with game ROM |
b4db550e |
1615 | memcpy(Pico32xMem->m68k_rom_bank + sizeof(Pico32xMem->m68k_rom), |
1616 | Pico.rom + sizeof(Pico32xMem->m68k_rom), |
1617 | sizeof(Pico32xMem->m68k_rom_bank) - sizeof(Pico32xMem->m68k_rom)); |
be2c4208 |
1618 | |
83ff19ec |
1619 | // MSH2 |
1620 | if (p32x_bios_m != NULL) { |
1621 | elprintf(EL_STATUS|EL_32X, "32x: using supplied master SH2 BIOS"); |
895d1512 |
1622 | Byteswap(&Pico32xMem->sh2_rom_m, p32x_bios_m, sizeof(Pico32xMem->sh2_rom_m)); |
acd35d4c |
1623 | } |
83ff19ec |
1624 | else { |
895d1512 |
1625 | pl = (u32 *)&Pico32xMem->sh2_rom_m; |
83ff19ec |
1626 | |
1627 | // fill exception vector table to our trap address |
1628 | for (i = 0; i < 128; i++) |
1629 | pl[i] = HWSWAP(0x200); |
1630 | |
1631 | // startup code |
895d1512 |
1632 | memcpy(&Pico32xMem->sh2_rom_m.b[0x200], msh2_code, sizeof(msh2_code)); |
83ff19ec |
1633 | |
1634 | // reset SP |
1635 | pl[1] = pl[3] = HWSWAP(0x6040000); |
1636 | // start |
1637 | pl[0] = pl[2] = HWSWAP(0x204); |
1638 | } |
1639 | |
1640 | // SSH2 |
1641 | if (p32x_bios_s != NULL) { |
1642 | elprintf(EL_STATUS|EL_32X, "32x: using supplied slave SH2 BIOS"); |
895d1512 |
1643 | Byteswap(&Pico32xMem->sh2_rom_s, p32x_bios_s, sizeof(Pico32xMem->sh2_rom_s)); |
83ff19ec |
1644 | } |
1645 | else { |
895d1512 |
1646 | pl = (u32 *)&Pico32xMem->sh2_rom_s; |
83ff19ec |
1647 | |
1648 | // fill exception vector table to our trap address |
1649 | for (i = 0; i < 128; i++) |
1650 | pl[i] = HWSWAP(0x200); |
1651 | |
1652 | // startup code |
895d1512 |
1653 | memcpy(&Pico32xMem->sh2_rom_s.b[0x200], ssh2_code, sizeof(ssh2_code)); |
83ff19ec |
1654 | |
1655 | // reset SP |
1656 | pl[1] = pl[3] = HWSWAP(0x603f800); |
1657 | // start |
1658 | pl[0] = pl[2] = HWSWAP(0x204); |
1659 | } |
1660 | } |
1661 | |
bcf65fd6 |
1662 | #define MAP_MEMORY(m) ((uptr)(m) >> 1) |
b8a1c09a |
1663 | #define MAP_HANDLER(h) ( ((uptr)(h) >> 1) | ((uptr)1 << (sizeof(uptr) * 8 - 1)) ) |
bcf65fd6 |
1664 | |
f81107f5 |
1665 | static sh2_memmap sh2_read8_map[0x80], sh2_read16_map[0x80]; |
f4bb5d6b |
1666 | // for writes we are using handlers only |
e05b81fc |
1667 | static sh2_write_handler *sh2_write8_map[0x80], *sh2_write16_map[0x80]; |
bcf65fd6 |
1668 | |
1669 | void Pico32xSwapDRAM(int b) |
1670 | { |
1671 | cpu68k_map_set(m68k_read8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); |
1672 | cpu68k_map_set(m68k_read16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); |
34280f9b |
1673 | cpu68k_map_set(m68k_read8_map, 0x860000, 0x87ffff, Pico32xMem->dram[b], 0); |
1674 | cpu68k_map_set(m68k_read16_map, 0x860000, 0x87ffff, Pico32xMem->dram[b], 0); |
1675 | cpu68k_map_set(m68k_write8_map, 0x840000, 0x87ffff, |
1676 | b ? m68k_write8_dram1_ow : m68k_write8_dram0_ow, 1); |
1677 | cpu68k_map_set(m68k_write16_map, 0x840000, 0x87ffff, |
1678 | b ? m68k_write16_dram1_ow : m68k_write16_dram0_ow, 1); |
bcf65fd6 |
1679 | |
1680 | // SH2 |
f81107f5 |
1681 | sh2_read8_map[0x04/2].addr = sh2_read8_map[0x24/2].addr = |
1682 | sh2_read16_map[0x04/2].addr = sh2_read16_map[0x24/2].addr = MAP_MEMORY(Pico32xMem->dram[b]); |
bcf65fd6 |
1683 | |
e05b81fc |
1684 | sh2_write8_map[0x04/2] = sh2_write8_map[0x24/2] = b ? sh2_write8_dram1 : sh2_write8_dram0; |
1685 | sh2_write16_map[0x04/2] = sh2_write16_map[0x24/2] = b ? sh2_write16_dram1 : sh2_write16_dram0; |
bcf65fd6 |
1686 | } |
1687 | |
83ff19ec |
1688 | void PicoMemSetup32x(void) |
1689 | { |
1690 | unsigned int rs; |
bcf65fd6 |
1691 | int i; |
83ff19ec |
1692 | |
e743be20 |
1693 | Pico32xMem = plat_mmap(0x06000000, sizeof(*Pico32xMem), 0, 0); |
83ff19ec |
1694 | if (Pico32xMem == NULL) { |
1695 | elprintf(EL_STATUS, "OOM"); |
1696 | return; |
1697 | } |
1698 | |
83ff19ec |
1699 | get_bios(); |
acd35d4c |
1700 | |
be2c4208 |
1701 | // cartridge area becomes unmapped |
1702 | // XXX: we take the easy way and don't unmap ROM, |
1703 | // so that we can avoid handling the RV bit. |
1704 | // m68k_map_unmap(0x000000, 0x3fffff); |
1705 | |
1706 | // MD ROM area |
b4db550e |
1707 | rs = sizeof(Pico32xMem->m68k_rom_bank); |
1708 | cpu68k_map_set(m68k_read8_map, 0x000000, rs - 1, Pico32xMem->m68k_rom_bank, 0); |
1709 | cpu68k_map_set(m68k_read16_map, 0x000000, rs - 1, Pico32xMem->m68k_rom_bank, 0); |
974fdb5b |
1710 | cpu68k_map_set(m68k_write8_map, 0x000000, rs - 1, PicoWrite8_hint, 1); // TODO verify |
1711 | cpu68k_map_set(m68k_write16_map, 0x000000, rs - 1, PicoWrite16_hint, 1); |
1712 | |
be2c4208 |
1713 | // 32X ROM (unbanked, XXX: consider mirroring?) |
5e49c3a8 |
1714 | rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK; |
1715 | if (rs > 0x80000) |
1716 | rs = 0x80000; |
1717 | cpu68k_map_set(m68k_read8_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0); |
1718 | cpu68k_map_set(m68k_read16_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0); |
77e58d93 |
1719 | cpu68k_map_set(m68k_write8_map, 0x880000, 0x880000 + rs - 1, PicoWrite8_cart, 1); |
1720 | cpu68k_map_set(m68k_write16_map, 0x880000, 0x880000 + rs - 1, PicoWrite16_cart, 1); |
602c28ca |
1721 | #ifdef EMU_F68K |
1722 | // setup FAME fetchmap |
be26eb23 |
1723 | PicoCpuFM68k.Fetch[0] = (unsigned long)Pico32xMem->m68k_rom; |
602c28ca |
1724 | for (rs = 0x88; rs < 0x90; rs++) |
be26eb23 |
1725 | PicoCpuFM68k.Fetch[rs] = (unsigned long)Pico.rom - 0x880000; |
602c28ca |
1726 | #endif |
be2c4208 |
1727 | |
1728 | // 32X ROM (banked) |
5e49c3a8 |
1729 | bank_switch(0); |
77e58d93 |
1730 | cpu68k_map_set(m68k_write8_map, 0x900000, 0x9fffff, PicoWrite8_bank, 1); |
1731 | cpu68k_map_set(m68k_write16_map, 0x900000, 0x9fffff, PicoWrite16_bank, 1); |
b78efee2 |
1732 | |
83ff19ec |
1733 | // SYS regs |
1734 | cpu68k_map_set(m68k_read8_map, 0xa10000, 0xa1ffff, PicoRead8_32x_on, 1); |
1735 | cpu68k_map_set(m68k_read16_map, 0xa10000, 0xa1ffff, PicoRead16_32x_on, 1); |
1736 | cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, PicoWrite8_32x_on, 1); |
1737 | cpu68k_map_set(m68k_write16_map, 0xa10000, 0xa1ffff, PicoWrite16_32x_on, 1); |
1738 | |
bcf65fd6 |
1739 | // SH2 maps: A31,A30,A29,CS1,CS0 |
1740 | // all unmapped by default |
e05b81fc |
1741 | for (i = 0; i < ARRAY_SIZE(sh2_read8_map); i++) { |
bcf65fd6 |
1742 | sh2_read8_map[i].addr = MAP_HANDLER(sh2_read8_unmapped); |
1743 | sh2_read16_map[i].addr = MAP_HANDLER(sh2_read16_unmapped); |
e05b81fc |
1744 | } |
1745 | |
1746 | for (i = 0; i < ARRAY_SIZE(sh2_write8_map); i++) { |
f4bb5d6b |
1747 | sh2_write8_map[i] = sh2_write8_unmapped; |
1748 | sh2_write16_map[i] = sh2_write16_unmapped; |
bcf65fd6 |
1749 | } |
1750 | |
4b315c21 |
1751 | // "purge area" |
e05b81fc |
1752 | for (i = 0x40; i <= 0x5f; i++) { |
1753 | sh2_write8_map[i >> 1] = |
1754 | sh2_write16_map[i >> 1] = sh2_write_ignore; |
4b315c21 |
1755 | } |
1756 | |
bcf65fd6 |
1757 | // CS0 |
f81107f5 |
1758 | sh2_read8_map[0x00/2].addr = sh2_read8_map[0x20/2].addr = MAP_HANDLER(sh2_read8_cs0); |
1759 | sh2_read16_map[0x00/2].addr = sh2_read16_map[0x20/2].addr = MAP_HANDLER(sh2_read16_cs0); |
e05b81fc |
1760 | sh2_write8_map[0x00/2] = sh2_write8_map[0x20/2] = sh2_write8_cs0; |
1761 | sh2_write16_map[0x00/2] = sh2_write16_map[0x20/2] = sh2_write16_cs0; |
bcf65fd6 |
1762 | // CS1 - ROM |
f81107f5 |
1763 | sh2_read8_map[0x02/2].addr = sh2_read8_map[0x22/2].addr = |
1764 | sh2_read16_map[0x02/2].addr = sh2_read16_map[0x22/2].addr = MAP_MEMORY(Pico.rom); |
1765 | sh2_read8_map[0x02/2].mask = sh2_read8_map[0x22/2].mask = |
1766 | sh2_read16_map[0x02/2].mask = sh2_read16_map[0x22/2].mask = 0x3fffff; // FIXME |
bcf65fd6 |
1767 | // CS2 - DRAM - done by Pico32xSwapDRAM() |
f81107f5 |
1768 | sh2_read8_map[0x04/2].mask = sh2_read8_map[0x24/2].mask = |
1769 | sh2_read16_map[0x04/2].mask = sh2_read16_map[0x24/2].mask = 0x01ffff; |
bcf65fd6 |
1770 | // CS3 - SDRAM |
f81107f5 |
1771 | sh2_read8_map[0x06/2].addr = sh2_read8_map[0x26/2].addr = |
1772 | sh2_read16_map[0x06/2].addr = sh2_read16_map[0x26/2].addr = MAP_MEMORY(Pico32xMem->sdram); |
8a847c12 |
1773 | sh2_write8_map[0x06/2] = sh2_write8_sdram; |
1774 | sh2_write8_map[0x26/2] = sh2_write8_sdram_wt; |
f81107f5 |
1775 | sh2_write16_map[0x06/2] = sh2_write16_map[0x26/2] = sh2_write16_sdram; |
1776 | sh2_read8_map[0x06/2].mask = sh2_read8_map[0x26/2].mask = |
1777 | sh2_read16_map[0x06/2].mask = sh2_read16_map[0x26/2].mask = 0x03ffff; |
bcf65fd6 |
1778 | // SH2 data array |
f81107f5 |
1779 | sh2_read8_map[0xc0/2].addr = MAP_HANDLER(sh2_read8_da); |
1780 | sh2_read16_map[0xc0/2].addr = MAP_HANDLER(sh2_read16_da); |
1781 | sh2_write8_map[0xc0/2] = sh2_write8_da; |
1782 | sh2_write16_map[0xc0/2] = sh2_write16_da; |
bcf65fd6 |
1783 | // SH2 IO |
f81107f5 |
1784 | sh2_read8_map[0xff/2].addr = MAP_HANDLER(sh2_peripheral_read8); |
1785 | sh2_read16_map[0xff/2].addr = MAP_HANDLER(sh2_peripheral_read16); |
1786 | sh2_write8_map[0xff/2] = sh2_peripheral_write8; |
1787 | sh2_write16_map[0xff/2] = sh2_peripheral_write16; |
bcf65fd6 |
1788 | |
1789 | // map DRAM area, both 68k and SH2 |
1790 | Pico32xSwapDRAM(1); |
1791 | |
1792 | msh2.read8_map = ssh2.read8_map = sh2_read8_map; |
1793 | msh2.read16_map = ssh2.read16_map = sh2_read16_map; |
23686515 |
1794 | msh2.write8_tab = ssh2.write8_tab = (const void **)(void *)sh2_write8_map; |
1795 | msh2.write16_tab = ssh2.write16_tab = (const void **)(void *)sh2_write16_map; |
bcf65fd6 |
1796 | |
23686515 |
1797 | sh2_drc_mem_setup(&msh2); |
1798 | sh2_drc_mem_setup(&ssh2); |
419973a6 |
1799 | |
1800 | // z80 hack |
1801 | z80_map_set(z80_write_map, 0x8000, 0xffff, z80_md_bank_write_32x, 1); |
be2c4208 |
1802 | } |
1803 | |
27e26273 |
1804 | void Pico32xMemStateLoaded(void) |
b4db550e |
1805 | { |
1806 | bank_switch(Pico32x.regs[4 / 2]); |
1807 | Pico32xSwapDRAM((Pico32x.vdp_regs[0x0a / 2] & P32XV_FS) ^ P32XV_FS); |
b4db550e |
1808 | memset(Pico32xMem->pwm, 0, sizeof(Pico32xMem->pwm)); |
27e26273 |
1809 | Pico32x.dirty_pal = 1; |
51d86e55 |
1810 | |
19886062 |
1811 | Pico32x.emu_flags &= ~(P32XF_68KCPOLL | P32XF_68KVPOLL); |
1812 | memset(&m68k_poll, 0, sizeof(m68k_poll)); |
1813 | msh2.state = 0; |
1814 | msh2.poll_addr = msh2.poll_cycles = msh2.poll_cnt = 0; |
1815 | ssh2.state = 0; |
1816 | ssh2.poll_addr = ssh2.poll_cycles = ssh2.poll_cnt = 0; |
1817 | |
b4db550e |
1818 | sh2_drc_flush_all(); |
b4db550e |
1819 | } |
1820 | |
ed4402a7 |
1821 | // vim:shiftwidth=2:ts=2:expandtab |