83ff19ec |
1 | /* |
2 | * Register map: |
3 | * a15100 F....... R.....EA F.....AC N...VHMP 4000 // Fm Ren nrEs Aden Cart heN V H cMd Pwm |
4 | * a15102 ........ ......SM ? 4002 // intS intM |
5 | * a15104 ........ ......10 ........ hhhhhhhh 4004 // bk1 bk0 Hint |
6 | * a15106 F....... .....SDR UE...... .....SDR 4006 // Full 68S Dma Rv fUll[fb] Empt[fb] |
7 | * a15108 (32bit DREQ src) 4008 |
8 | * a1510c (32bit DREQ dst) 400c |
9 | * a15110 llllllll llllll00 4010 // DREQ Len |
10 | * a15112 (16bit FIFO reg) 4012 |
11 | * a15114 ? (16bit VRES clr) 4014 |
12 | * a15116 ? (16bit Vint clr) 4016 |
13 | * a15118 ? (16bit Hint clr) 4018 |
14 | * a1511a ........ .......C (16bit CMD clr) 401a // Cm |
15 | * a1511c ? (16bit PWM clr) 401c |
16 | * a1511e ? ? 401e |
17 | * a15120 (16 bytes comm) 2020 |
18 | * a15130 (PWM) 2030 |
19 | */ |
be2c4208 |
20 | #include "../pico_int.h" |
21 | #include "../memory.h" |
22 | |
236990cf |
23 | #if 0 |
c987bb5c |
24 | #undef ash2_end_run |
25 | #undef SekEndRun |
26 | #define ash2_end_run(x) |
27 | #define SekEndRun(x) |
28 | #endif |
29 | |
be2c4208 |
30 | static const char str_mars[] = "MARS"; |
31 | |
83ff19ec |
32 | void *p32x_bios_g, *p32x_bios_m, *p32x_bios_s; |
974fdb5b |
33 | struct Pico32xMem *Pico32xMem; |
34 | |
5e49c3a8 |
35 | static void bank_switch(int b); |
36 | |
266c6afa |
37 | // poll detection |
4ea707e1 |
38 | #define POLL_THRESHOLD 6 |
39 | |
266c6afa |
40 | struct poll_det { |
be20816c |
41 | u32 addr, cycles, cyc_max; |
42 | int cnt, flag; |
266c6afa |
43 | }; |
b78efee2 |
44 | static struct poll_det m68k_poll, sh2_poll[2]; |
266c6afa |
45 | |
be20816c |
46 | static int p32x_poll_detect(struct poll_det *pd, u32 a, u32 cycles, int is_vdp) |
266c6afa |
47 | { |
b78efee2 |
48 | int ret = 0, flag = pd->flag; |
49 | |
50 | if (is_vdp) |
51 | flag <<= 3; |
266c6afa |
52 | |
1d7a28a7 |
53 | if (a - 2 <= pd->addr && pd->addr <= a + 2 && cycles - pd->cycles <= pd->cyc_max) { |
266c6afa |
54 | pd->cnt++; |
55 | if (pd->cnt > POLL_THRESHOLD) { |
56 | if (!(Pico32x.emu_flags & flag)) { |
be20816c |
57 | elprintf(EL_32X, "%s poll addr %08x, cyc %u", |
58 | flag & (P32XF_68KPOLL|P32XF_68KVPOLL) ? "m68k" : |
59 | (flag & (P32XF_MSH2POLL|P32XF_MSH2VPOLL) ? "msh2" : "ssh2"), a, cycles - pd->cycles); |
266c6afa |
60 | ret = 1; |
61 | } |
62 | Pico32x.emu_flags |= flag; |
63 | } |
64 | } |
c987bb5c |
65 | else { |
266c6afa |
66 | pd->cnt = 0; |
c987bb5c |
67 | pd->addr = a; |
68 | } |
be20816c |
69 | pd->cycles = cycles; |
266c6afa |
70 | |
71 | return ret; |
72 | } |
73 | |
b78efee2 |
74 | static int p32x_poll_undetect(struct poll_det *pd, int is_vdp) |
266c6afa |
75 | { |
b78efee2 |
76 | int ret = 0, flag = pd->flag; |
77 | if (is_vdp) |
be20816c |
78 | flag <<= 3; // VDP only |
79 | else |
80 | flag |= flag << 3; // both |
81 | if (Pico32x.emu_flags & flag) { |
82 | elprintf(EL_32X, "poll %02x -> %02x", Pico32x.emu_flags, Pico32x.emu_flags & ~flag); |
266c6afa |
83 | ret = 1; |
be20816c |
84 | } |
266c6afa |
85 | Pico32x.emu_flags &= ~flag; |
be20816c |
86 | pd->addr = pd->cnt = 0; |
266c6afa |
87 | return ret; |
88 | } |
89 | |
87accdf7 |
90 | void p32x_poll_event(int cpu_mask, int is_vdp) |
4ea707e1 |
91 | { |
87accdf7 |
92 | if (cpu_mask & 1) |
93 | p32x_poll_undetect(&sh2_poll[0], is_vdp); |
94 | if (cpu_mask & 2) |
95 | p32x_poll_undetect(&sh2_poll[1], is_vdp); |
4ea707e1 |
96 | } |
97 | |
974fdb5b |
98 | // SH2 faking |
b78efee2 |
99 | //#define FAKE_SH2 |
acd35d4c |
100 | int p32x_csum_faked; |
101 | #ifdef FAKE_SH2 |
974fdb5b |
102 | static const u16 comm_fakevals[] = { |
103 | 0x4d5f, 0x4f4b, // M_OK |
104 | 0x535f, 0x4f4b, // S_OK |
5e49c3a8 |
105 | 0x4D41, 0x5346, // MASF - Brutal Unleashed |
106 | 0x5331, 0x4d31, // Darxide |
107 | 0x5332, 0x4d32, |
108 | 0x5333, 0x4d33, |
109 | 0x0000, 0x0000, // eq for doom |
974fdb5b |
110 | 0x0002, // Mortal Kombat |
acd35d4c |
111 | // 0, // pad |
be2c4208 |
112 | }; |
acd35d4c |
113 | |
114 | static u32 sh2_comm_faker(u32 a) |
115 | { |
116 | static int f = 0; |
117 | if (a == 0x28 && !p32x_csum_faked) { |
118 | p32x_csum_faked = 1; |
119 | return *(unsigned short *)(Pico.rom + 0x18e); |
120 | } |
121 | if (f >= sizeof(comm_fakevals) / sizeof(comm_fakevals[0])) |
122 | f = 0; |
123 | return comm_fakevals[f++]; |
124 | } |
125 | #endif |
be2c4208 |
126 | |
4ea707e1 |
127 | // DMAC handling |
128 | static struct { |
129 | unsigned int sar0, dar0, tcr0; // src addr, dst addr, transfer count |
130 | unsigned int chcr0; // chan ctl |
131 | unsigned int sar1, dar1, tcr1; // same for chan 1 |
132 | unsigned int chcr1; |
133 | int pad[4]; |
134 | unsigned int dmaor; |
135 | } * dmac0; |
136 | |
137 | static void dma_68k2sh2_do(void) |
138 | { |
139 | unsigned short *dreqlen = &Pico32x.regs[0x10 / 2]; |
140 | int i; |
141 | |
142 | if (dmac0->tcr0 != *dreqlen) |
143 | elprintf(EL_32X|EL_ANOMALY, "tcr0 and dreq len differ: %d != %d", dmac0->tcr0, *dreqlen); |
144 | |
1b3f5844 |
145 | // HACK: assume bus is busy and SH2 is halted |
146 | // XXX: use different mechanism for this, not poll det |
147 | Pico32x.emu_flags |= P32XF_MSH2POLL; // id ? P32XF_SSH2POLL : P32XF_MSH2POLL; |
148 | |
4ea707e1 |
149 | for (i = 0; i < Pico32x.dmac_ptr && dmac0->tcr0 > 0; i++) { |
b78efee2 |
150 | extern void p32x_sh2_write16(u32 a, u32 d, int id); |
be20816c |
151 | elprintf(EL_32X, "dmaw [%08x] %04x, left %d", dmac0->dar0, Pico32x.dmac_fifo[i], *dreqlen); |
b78efee2 |
152 | p32x_sh2_write16(dmac0->dar0, Pico32x.dmac_fifo[i], 0); |
4ea707e1 |
153 | dmac0->dar0 += 2; |
154 | dmac0->tcr0--; |
155 | (*dreqlen)--; |
156 | } |
157 | |
158 | Pico32x.dmac_ptr = 0; // HACK |
159 | Pico32x.regs[6 / 2] &= ~P32XS_FULL; |
160 | if (*dreqlen == 0) |
161 | Pico32x.regs[6 / 2] &= ~P32XS_68S; // transfer complete |
be20816c |
162 | if (dmac0->tcr0 == 0) { |
4ea707e1 |
163 | dmac0->chcr0 |= 2; // DMA has ended normally |
be20816c |
164 | p32x_poll_undetect(&sh2_poll[0], 0); |
165 | } |
4ea707e1 |
166 | } |
167 | |
168 | // ------------------------------------------------------------------ |
b78efee2 |
169 | // 68k regs |
4ea707e1 |
170 | |
be2c4208 |
171 | static u32 p32x_reg_read16(u32 a) |
172 | { |
173 | a &= 0x3e; |
174 | |
87accdf7 |
175 | if (a == 2) // INTM, INTS |
176 | return ((Pico32x.sh2irqi[0] & P32XI_CMD) >> 4) | ((Pico32x.sh2irqi[1] & P32XI_CMD) >> 3); |
3cf9570b |
177 | #if 0 |
974fdb5b |
178 | if ((a & 0x30) == 0x20) |
acd35d4c |
179 | return sh2_comm_faker(a); |
266c6afa |
180 | #else |
5fadfb1c |
181 | if ((a & 0x30) == 0x20) { |
182 | // evil X-Men proto polls in a dbra loop and expects it to expire.. |
183 | static u32 dr2 = 0; |
184 | if (SekDar(2) != dr2) |
185 | m68k_poll.cnt = 0; |
186 | dr2 = SekDar(2); |
187 | |
188 | if (p32x_poll_detect(&m68k_poll, a, SekCyclesDoneT(), 0)) { |
189 | SekSetStop(1); |
190 | SekEndTimeslice(16); |
191 | } |
192 | dr2 = SekDar(2); |
266c6afa |
193 | } |
acd35d4c |
194 | #endif |
87accdf7 |
195 | |
db1d3564 |
196 | if ((a & 0x30) == 0x30) |
197 | return p32x_pwm_read16(a); |
974fdb5b |
198 | |
be2c4208 |
199 | return Pico32x.regs[a / 2]; |
200 | } |
201 | |
be2c4208 |
202 | static void p32x_reg_write8(u32 a, u32 d) |
203 | { |
acd35d4c |
204 | u16 *r = Pico32x.regs; |
be2c4208 |
205 | a &= 0x3f; |
206 | |
97d3f47f |
207 | // for things like bset on comm port |
208 | m68k_poll.cnt = 0; |
209 | |
acd35d4c |
210 | switch (a) { |
4ea707e1 |
211 | case 0: // adapter ctl |
83ff19ec |
212 | r[0] = (r[0] & ~P32XS_FM) | ((d << 8) & P32XS_FM); |
213 | return; |
214 | case 1: // adapter ctl, RES bit writeable |
215 | if ((d ^ r[0]) & d & P32XS_nRES) |
216 | p32x_reset_sh2s(); |
217 | r[0] = (r[0] & ~P32XS_nRES) | (d & P32XS_nRES); |
1b3f5844 |
218 | return; |
4ea707e1 |
219 | case 3: // irq ctl |
220 | if ((d & 1) && !(Pico32x.sh2irqi[0] & P32XI_CMD)) { |
221 | Pico32x.sh2irqi[0] |= P32XI_CMD; |
222 | p32x_update_irls(); |
87accdf7 |
223 | SekEndRun(16); |
4ea707e1 |
224 | } |
b78efee2 |
225 | if ((d & 2) && !(Pico32x.sh2irqi[1] & P32XI_CMD)) { |
226 | Pico32x.sh2irqi[1] |= P32XI_CMD; |
227 | p32x_update_irls(); |
87accdf7 |
228 | SekEndRun(16); |
b78efee2 |
229 | } |
1b3f5844 |
230 | return; |
4ea707e1 |
231 | case 5: // bank |
acd35d4c |
232 | d &= 7; |
4ea707e1 |
233 | if (r[4 / 2] != d) { |
234 | r[4 / 2] = d; |
acd35d4c |
235 | bank_switch(d); |
236 | } |
1b3f5844 |
237 | return; |
4ea707e1 |
238 | case 7: // DREQ ctl |
97d3f47f |
239 | r[6 / 2] = (r[6 / 2] & P32XS_FULL) | (d & (P32XS_68S|P32XS_DMA|P32XS_RV)); |
1b3f5844 |
240 | return; |
87accdf7 |
241 | case 0x1b: // TV |
242 | r[0x1a / 2] = d; |
1b3f5844 |
243 | return; |
244 | } |
245 | |
246 | if ((a & 0x30) == 0x20) { |
247 | u8 *r8 = (u8 *)r; |
248 | r8[a ^ 1] = d; |
236990cf |
249 | p32x_poll_undetect(&sh2_poll[0], 0); |
250 | p32x_poll_undetect(&sh2_poll[1], 0); |
251 | // if some SH2 is busy waiting, it needs to see the result ASAP |
252 | if (SekCyclesLeftNoMCD > 32) |
253 | SekEndRun(32); |
1b3f5844 |
254 | return; |
5e49c3a8 |
255 | } |
256 | } |
257 | |
258 | static void p32x_reg_write16(u32 a, u32 d) |
259 | { |
acd35d4c |
260 | u16 *r = Pico32x.regs; |
261 | a &= 0x3e; |
262 | |
97d3f47f |
263 | // for things like bset on comm port |
264 | m68k_poll.cnt = 0; |
265 | |
acd35d4c |
266 | switch (a) { |
4ea707e1 |
267 | case 0x00: // adapter ctl |
83ff19ec |
268 | if ((d ^ r[0]) & d & P32XS_nRES) |
269 | p32x_reset_sh2s(); |
270 | r[0] = (r[0] & ~(P32XS_FM|P32XS_nRES)) | (d & (P32XS_FM|P32XS_nRES)); |
acd35d4c |
271 | return; |
4ea707e1 |
272 | case 0x10: // DREQ len |
273 | r[a / 2] = d & ~3; |
274 | return; |
275 | case 0x12: // FIFO reg |
276 | if (!(r[6 / 2] & P32XS_68S)) { |
277 | elprintf(EL_32X|EL_ANOMALY, "DREQ FIFO w16 without 68S?"); |
278 | return; |
279 | } |
280 | if (Pico32x.dmac_ptr < DMAC_FIFO_LEN) { |
281 | Pico32x.dmac_fifo[Pico32x.dmac_ptr++] = d; |
282 | if ((Pico32x.dmac_ptr & 3) == 0 && (dmac0->chcr0 & 3) == 1 && (dmac0->dmaor & 1)) |
283 | dma_68k2sh2_do(); |
284 | if (Pico32x.dmac_ptr == DMAC_FIFO_LEN) |
285 | r[6 / 2] |= P32XS_FULL; |
286 | } |
287 | break; |
acd35d4c |
288 | } |
289 | |
4ea707e1 |
290 | // DREQ src, dst |
291 | if ((a & 0x38) == 0x08) { |
292 | r[a / 2] = d; |
293 | return; |
294 | } |
295 | // comm port |
296 | else if ((a & 0x30) == 0x20 && r[a / 2] != d) { |
acd35d4c |
297 | r[a / 2] = d; |
236990cf |
298 | p32x_poll_undetect(&sh2_poll[0], 0); |
299 | p32x_poll_undetect(&sh2_poll[1], 0); |
300 | // same as for w8 |
301 | if (SekCyclesLeftNoMCD > 32) |
302 | SekEndRun(32); |
acd35d4c |
303 | return; |
304 | } |
db1d3564 |
305 | // PWM |
306 | else if ((a & 0x30) == 0x30) { |
307 | p32x_pwm_write16(a, d); |
308 | return; |
309 | } |
acd35d4c |
310 | |
5e49c3a8 |
311 | p32x_reg_write8(a + 1, d); |
be2c4208 |
312 | } |
313 | |
4ea707e1 |
314 | // ------------------------------------------------------------------ |
be2c4208 |
315 | // VDP regs |
316 | static u32 p32x_vdp_read16(u32 a) |
317 | { |
318 | a &= 0x0e; |
319 | |
320 | return Pico32x.vdp_regs[a / 2]; |
321 | } |
322 | |
be2c4208 |
323 | static void p32x_vdp_write8(u32 a, u32 d) |
324 | { |
974fdb5b |
325 | u16 *r = Pico32x.vdp_regs; |
be2c4208 |
326 | a &= 0x0f; |
327 | |
4ea707e1 |
328 | // for FEN checks between writes |
b78efee2 |
329 | sh2_poll[0].cnt = 0; |
4ea707e1 |
330 | |
974fdb5b |
331 | // TODO: verify what's writeable |
be2c4208 |
332 | switch (a) { |
974fdb5b |
333 | case 0x01: |
5e49c3a8 |
334 | // priority inversion is handled in palette |
335 | if ((r[0] ^ d) & P32XV_PRI) |
336 | Pico32x.dirty_pal = 1; |
974fdb5b |
337 | r[0] = (r[0] & P32XV_nPAL) | (d & 0xff); |
be20816c |
338 | break; |
339 | case 0x05: // fill len |
340 | r[4 / 2] = d & 0xff; |
974fdb5b |
341 | break; |
be2c4208 |
342 | case 0x0b: |
974fdb5b |
343 | d &= 1; |
344 | Pico32x.pending_fb = d; |
345 | // if we are blanking and FS bit is changing |
4ea707e1 |
346 | if (((r[0x0a/2] & P32XV_VBLK) || (r[0] & P32XV_Mx) == 0) && ((r[0x0a/2] ^ d) & P32XV_FS)) { |
974fdb5b |
347 | r[0x0a/2] ^= 1; |
348 | Pico32xSwapDRAM(d ^ 1); |
266c6afa |
349 | elprintf(EL_32X, "VDP FS: %d", r[0x0a/2] & P32XV_FS); |
be2c4208 |
350 | } |
351 | break; |
352 | } |
353 | } |
354 | |
974fdb5b |
355 | static void p32x_vdp_write16(u32 a, u32 d) |
356 | { |
be20816c |
357 | a &= 0x0e; |
358 | if (a == 6) { // fill start |
359 | Pico32x.vdp_regs[6 / 2] = d; |
360 | return; |
361 | } |
362 | if (a == 8) { // fill data |
363 | u16 *dram = Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1]; |
1b3f5844 |
364 | int len = Pico32x.vdp_regs[4 / 2] + 1; |
be20816c |
365 | a = Pico32x.vdp_regs[6 / 2]; |
366 | while (len--) { |
367 | dram[a] = d; |
368 | a = (a & 0xff00) | ((a + 1) & 0xff); |
369 | } |
370 | Pico32x.vdp_regs[6 / 2] = a; |
371 | Pico32x.vdp_regs[8 / 2] = d; |
372 | return; |
373 | } |
374 | |
974fdb5b |
375 | p32x_vdp_write8(a | 1, d); |
376 | } |
377 | |
4ea707e1 |
378 | // ------------------------------------------------------------------ |
acd35d4c |
379 | // SH2 regs |
b78efee2 |
380 | |
381 | static u32 p32x_sh2reg_read16(u32 a, int cpuid) |
acd35d4c |
382 | { |
4ea707e1 |
383 | u16 *r = Pico32x.regs; |
384 | a &= 0xfe; // ? |
266c6afa |
385 | |
4ea707e1 |
386 | switch (a) { |
387 | case 0x00: // adapter/irq ctl |
87accdf7 |
388 | return (r[0] & P32XS_FM) | Pico32x.sh2_regs[0] | Pico32x.sh2irq_mask[cpuid]; |
c987bb5c |
389 | case 0x04: // H count (often as comm too) |
390 | if (p32x_poll_detect(&sh2_poll[cpuid], a, ash2_cycles_done(), 0)) |
391 | ash2_end_run(8); |
87accdf7 |
392 | return Pico32x.sh2_regs[4 / 2]; |
4ea707e1 |
393 | case 0x10: // DREQ len |
394 | return r[a / 2]; |
acd35d4c |
395 | } |
4ea707e1 |
396 | |
db1d3564 |
397 | // DREQ src, dst |
398 | if ((a & 0x38) == 0x08) |
4ea707e1 |
399 | return r[a / 2]; |
db1d3564 |
400 | // comm port |
401 | if ((a & 0x30) == 0x20) { |
be20816c |
402 | if (p32x_poll_detect(&sh2_poll[cpuid], a, ash2_cycles_done(), 0)) |
db1d3564 |
403 | ash2_end_run(8); |
404 | return r[a / 2]; |
405 | } |
406 | if ((a & 0x30) == 0x30) { |
407 | sh2_poll[cpuid].cnt = 0; |
408 | return p32x_pwm_read16(a); |
409 | } |
acd35d4c |
410 | |
411 | return 0; |
412 | } |
413 | |
b78efee2 |
414 | static void p32x_sh2reg_write8(u32 a, u32 d, int cpuid) |
acd35d4c |
415 | { |
4ea707e1 |
416 | a &= 0xff; |
87accdf7 |
417 | switch (a) { |
418 | case 0: // FM |
419 | Pico32x.regs[0] &= ~P32XS_FM; |
420 | Pico32x.regs[0] |= (d << 8) & P32XS_FM; |
1b3f5844 |
421 | return; |
87accdf7 |
422 | case 1: // |
423 | Pico32x.sh2irq_mask[cpuid] = d & 0x8f; |
424 | Pico32x.sh2_regs[0] &= ~0x80; |
425 | Pico32x.sh2_regs[0] |= d & 0x80; |
426 | p32x_update_irls(); |
1b3f5844 |
427 | return; |
87accdf7 |
428 | case 5: // H count |
429 | Pico32x.sh2_regs[4 / 2] = d & 0xff; |
c987bb5c |
430 | p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0); |
1b3f5844 |
431 | return; |
432 | } |
433 | |
434 | if ((a & 0x30) == 0x20) { |
435 | u8 *r8 = (u8 *)Pico32x.regs; |
436 | r8[a ^ 1] = d; |
5fadfb1c |
437 | if (p32x_poll_undetect(&m68k_poll, 0)) |
438 | SekSetStop(0); |
1b3f5844 |
439 | p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0); |
440 | return; |
4ea707e1 |
441 | } |
acd35d4c |
442 | } |
443 | |
b78efee2 |
444 | static void p32x_sh2reg_write16(u32 a, u32 d, int cpuid) |
acd35d4c |
445 | { |
4ea707e1 |
446 | a &= 0xfe; |
acd35d4c |
447 | |
db1d3564 |
448 | // comm |
4ea707e1 |
449 | if ((a & 0x30) == 0x20 && Pico32x.regs[a/2] != d) { |
b78efee2 |
450 | Pico32x.regs[a / 2] = d; |
5fadfb1c |
451 | if (p32x_poll_undetect(&m68k_poll, 0)) |
452 | SekSetStop(0); |
b78efee2 |
453 | p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0); |
acd35d4c |
454 | return; |
455 | } |
db1d3564 |
456 | // PWM |
457 | else if ((a & 0x30) == 0x30) { |
458 | p32x_pwm_write16(a, d); |
459 | return; |
460 | } |
acd35d4c |
461 | |
4ea707e1 |
462 | switch (a) { |
87accdf7 |
463 | case 0: // FM |
464 | Pico32x.regs[0] &= ~P32XS_FM; |
465 | Pico32x.regs[0] |= d & P32XS_FM; |
466 | break; |
4ea707e1 |
467 | case 0x14: Pico32x.sh2irqs &= ~P32XI_VRES; goto irls; |
468 | case 0x16: Pico32x.sh2irqs &= ~P32XI_VINT; goto irls; |
469 | case 0x18: Pico32x.sh2irqs &= ~P32XI_HINT; goto irls; |
b78efee2 |
470 | case 0x1a: Pico32x.sh2irqi[cpuid] &= ~P32XI_CMD; goto irls; |
be20816c |
471 | case 0x1c: |
472 | Pico32x.sh2irqs &= ~P32XI_PWM; |
1d7a28a7 |
473 | p32x_timers_do(0); |
be20816c |
474 | goto irls; |
4ea707e1 |
475 | } |
476 | |
b78efee2 |
477 | p32x_sh2reg_write8(a | 1, d, cpuid); |
4ea707e1 |
478 | return; |
479 | |
480 | irls: |
481 | p32x_update_irls(); |
482 | } |
483 | |
87accdf7 |
484 | // ------------------------------------------------------------------ |
485 | // SH2 internal peripherals |
1d7a28a7 |
486 | // we keep them in little endian format |
87accdf7 |
487 | static u32 sh2_peripheral_read8(u32 a, int id) |
488 | { |
489 | u8 *r = (void *)Pico32xMem->sh2_peri_regs[id]; |
490 | u32 d; |
491 | |
492 | a &= 0x1ff; |
1d7a28a7 |
493 | d = PREG8(r, a); |
87accdf7 |
494 | |
495 | elprintf(EL_32X, "%csh2 peri r8 [%08x] %02x @%06x", id ? 's' : 'm', a | ~0x1ff, d, sh2_pc(id)); |
496 | return d; |
497 | } |
498 | |
1d7a28a7 |
499 | static u32 sh2_peripheral_read16(u32 a, int id) |
500 | { |
501 | u16 *r = (void *)Pico32xMem->sh2_peri_regs[id]; |
502 | u32 d; |
503 | |
504 | a &= 0x1ff; |
505 | d = r[(a / 2) ^ 1]; |
506 | |
507 | elprintf(EL_32X, "%csh2 peri r16 [%08x] %04x @%06x", id ? 's' : 'm', a | ~0x1ff, d, sh2_pc(id)); |
508 | return d; |
509 | } |
510 | |
87accdf7 |
511 | static u32 sh2_peripheral_read32(u32 a, int id) |
4ea707e1 |
512 | { |
513 | u32 d; |
514 | a &= 0x1fc; |
97d3f47f |
515 | d = Pico32xMem->sh2_peri_regs[id][a / 4]; |
4ea707e1 |
516 | |
97d3f47f |
517 | elprintf(EL_32X, "%csh2 peri r32 [%08x] %08x @%06x", id ? 's' : 'm', a | ~0x1ff, d, sh2_pc(id)); |
4ea707e1 |
518 | return d; |
acd35d4c |
519 | } |
520 | |
87accdf7 |
521 | static void sh2_peripheral_write8(u32 a, u32 d, int id) |
522 | { |
523 | u8 *r = (void *)Pico32xMem->sh2_peri_regs[id]; |
524 | elprintf(EL_32X, "%csh2 peri w8 [%08x] %02x @%06x", id ? 's' : 'm', a, d, sh2_pc(id)); |
525 | |
526 | a &= 0x1ff; |
1d7a28a7 |
527 | PREG8(r, a) = d; |
528 | |
529 | // X-men SCI hack |
530 | if ((a == 2 && (d & 0x20)) || // transmiter enabled |
531 | (a == 4 && !(d & 0x80))) { // valid data in TDR |
532 | void *oregs = Pico32xMem->sh2_peri_regs[id ^ 1]; |
533 | if ((PREG8(oregs, 2) & 0x50) == 0x50) { // receiver + irq enabled |
534 | int level = PREG8(oregs, 0x60) >> 4; |
535 | int vector = PREG8(oregs, 0x63) & 0x7f; |
536 | elprintf(EL_32X, "%csh2 SCI recv irq (%d, %d)", (id ^ 1) ? 's' : 'm', level, vector); |
537 | sh2_internal_irq(&sh2s[id ^ 1], level, vector); |
538 | } |
539 | } |
540 | } |
541 | |
542 | static void sh2_peripheral_write16(u32 a, u32 d, int id) |
543 | { |
544 | u16 *r = (void *)Pico32xMem->sh2_peri_regs[id]; |
545 | elprintf(EL_32X, "%csh2 peri w16 [%08x] %04x @%06x", id ? 's' : 'm', a, d, sh2_pc(id)); |
546 | |
547 | a &= 0x1ff; |
548 | |
549 | // evil WDT |
550 | if (a == 0x80) { |
551 | if ((d & 0xff00) == 0xa500) { // WTCSR |
552 | PREG8(r, 0x80) = d; |
553 | p32x_timers_recalc(); |
554 | } |
555 | if ((d & 0xff00) == 0x5a00) // WTCNT |
556 | PREG8(r, 0x81) = d; |
557 | return; |
558 | } |
559 | |
560 | r[(a / 2) ^ 1] = d; |
87accdf7 |
561 | } |
562 | |
563 | static void sh2_peripheral_write32(u32 a, u32 d, int id) |
4ea707e1 |
564 | { |
be20816c |
565 | u32 *r = Pico32xMem->sh2_peri_regs[id]; |
b78efee2 |
566 | elprintf(EL_32X, "%csh2 peri w32 [%08x] %08x @%06x", id ? 's' : 'm', a, d, sh2_pc(id)); |
4ea707e1 |
567 | |
568 | a &= 0x1fc; |
569 | r[a / 4] = d; |
570 | |
97d3f47f |
571 | switch (a) { |
be20816c |
572 | // division unit (TODO: verify): |
97d3f47f |
573 | case 0x104: // DVDNT: divident L, starts divide |
574 | elprintf(EL_32X, "%csh2 divide %08x / %08x", id ? 's' : 'm', d, r[0x100 / 4]); |
575 | if (r[0x100 / 4]) { |
be20816c |
576 | signed int divisor = r[0x100 / 4]; |
577 | r[0x118 / 4] = r[0x110 / 4] = (signed int)d % divisor; |
578 | r[0x104 / 4] = r[0x11c / 4] = r[0x114 / 4] = (signed int)d / divisor; |
97d3f47f |
579 | } |
1625ed01 |
580 | else |
581 | r[0x110 / 4] = r[0x114 / 4] = r[0x118 / 4] = r[0x11c / 4] = 0; // ? |
97d3f47f |
582 | break; |
583 | case 0x114: |
584 | elprintf(EL_32X, "%csh2 divide %08x%08x / %08x @%08x", |
585 | id ? 's' : 'm', r[0x110 / 4], d, r[0x100 / 4], sh2_pc(id)); |
586 | if (r[0x100 / 4]) { |
be20816c |
587 | signed long long divident = (signed long long)r[0x110 / 4] << 32 | d; |
588 | signed int divisor = r[0x100 / 4]; |
97d3f47f |
589 | // XXX: undocumented mirroring to 0x118,0x11c? |
be20816c |
590 | r[0x118 / 4] = r[0x110 / 4] = divident % divisor; |
1625ed01 |
591 | divident /= divisor; |
592 | r[0x11c / 4] = r[0x114 / 4] = divident; |
593 | divident >>= 31; |
594 | if ((unsigned long long)divident + 1 > 1) { |
595 | //elprintf(EL_32X, "%csh2 divide overflow! @%08x", id ? 's' : 'm', sh2_pc(id)); |
596 | r[0x11c / 4] = r[0x114 / 4] = divident > 0 ? 0x7fffffff : 0x80000000; // overflow |
597 | } |
97d3f47f |
598 | } |
1625ed01 |
599 | else |
600 | r[0x110 / 4] = r[0x114 / 4] = r[0x118 / 4] = r[0x11c / 4] = 0; // ? |
97d3f47f |
601 | break; |
602 | } |
603 | |
4ea707e1 |
604 | if ((a == 0x1b0 || a == 0x18c) && (dmac0->chcr0 & 3) == 1 && (dmac0->dmaor & 1)) { |
605 | elprintf(EL_32X, "sh2 DMA %08x -> %08x, cnt %d, chcr %04x @%06x", |
b78efee2 |
606 | dmac0->sar0, dmac0->dar0, dmac0->tcr0, dmac0->chcr0, sh2_pc(id)); |
4ea707e1 |
607 | dmac0->tcr0 &= 0xffffff; |
be20816c |
608 | |
1b3f5844 |
609 | // HACK: assume 68k starts writing soon and end the timeslice |
610 | ash2_end_run(16); |
be20816c |
611 | |
4ea707e1 |
612 | // DREQ is only sent after first 4 words are written. |
613 | // we do multiple of 4 words to avoid messing up alignment |
614 | if (dmac0->sar0 == 0x20004012 && Pico32x.dmac_ptr && (Pico32x.dmac_ptr & 3) == 0) { |
615 | elprintf(EL_32X, "68k -> sh2 DMA"); |
616 | dma_68k2sh2_do(); |
617 | } |
618 | } |
619 | } |
620 | |
621 | // ------------------------------------------------------------------ |
83ff19ec |
622 | // 32x handlers |
623 | |
624 | // after ADEN |
625 | static u32 PicoRead8_32x_on(u32 a) |
be2c4208 |
626 | { |
627 | u32 d = 0; |
628 | if ((a & 0xffc0) == 0x5100) { // a15100 |
629 | d = p32x_reg_read16(a); |
630 | goto out_16to8; |
631 | } |
632 | |
83ff19ec |
633 | if ((a & 0xfc00) != 0x5000) |
634 | return PicoRead8_io(a); |
974fdb5b |
635 | |
636 | if ((a & 0xfff0) == 0x5180) { // a15180 |
be2c4208 |
637 | d = p32x_vdp_read16(a); |
638 | goto out_16to8; |
639 | } |
640 | |
974fdb5b |
641 | if ((a & 0xfe00) == 0x5200) { // a15200 |
642 | d = Pico32xMem->pal[(a & 0x1ff) / 2]; |
643 | goto out_16to8; |
644 | } |
645 | |
be2c4208 |
646 | if ((a & 0xfffc) == 0x30ec) { // a130ec |
647 | d = str_mars[a & 3]; |
648 | goto out; |
649 | } |
650 | |
651 | elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc); |
652 | return d; |
653 | |
654 | out_16to8: |
655 | if (a & 1) |
656 | d &= 0xff; |
657 | else |
658 | d >>= 8; |
659 | |
660 | out: |
661 | elprintf(EL_32X, "m68k 32x r8 [%06x] %02x @%06x", a, d, SekPc); |
662 | return d; |
663 | } |
664 | |
83ff19ec |
665 | static u32 PicoRead16_32x_on(u32 a) |
be2c4208 |
666 | { |
667 | u32 d = 0; |
668 | if ((a & 0xffc0) == 0x5100) { // a15100 |
669 | d = p32x_reg_read16(a); |
670 | goto out; |
671 | } |
672 | |
83ff19ec |
673 | if ((a & 0xfc00) != 0x5000) |
674 | return PicoRead16_io(a); |
974fdb5b |
675 | |
676 | if ((a & 0xfff0) == 0x5180) { // a15180 |
be2c4208 |
677 | d = p32x_vdp_read16(a); |
678 | goto out; |
679 | } |
680 | |
974fdb5b |
681 | if ((a & 0xfe00) == 0x5200) { // a15200 |
682 | d = Pico32xMem->pal[(a & 0x1ff) / 2]; |
683 | goto out; |
684 | } |
685 | |
be2c4208 |
686 | if ((a & 0xfffc) == 0x30ec) { // a130ec |
687 | d = !(a & 2) ? ('M'<<8)|'A' : ('R'<<8)|'S'; |
688 | goto out; |
689 | } |
690 | |
691 | elprintf(EL_UIO, "m68k unmapped r16 [%06x] @%06x", a, SekPc); |
692 | return d; |
693 | |
694 | out: |
695 | elprintf(EL_32X, "m68k 32x r16 [%06x] %04x @%06x", a, d, SekPc); |
696 | return d; |
697 | } |
698 | |
83ff19ec |
699 | static void PicoWrite8_32x_on(u32 a, u32 d) |
be2c4208 |
700 | { |
701 | if ((a & 0xfc00) == 0x5000) |
702 | elprintf(EL_32X, "m68k 32x w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
703 | |
704 | if ((a & 0xffc0) == 0x5100) { // a15100 |
705 | p32x_reg_write8(a, d); |
706 | return; |
707 | } |
708 | |
83ff19ec |
709 | if ((a & 0xfc00) != 0x5000) { |
710 | PicoWrite8_io(a, d); |
711 | return; |
712 | } |
974fdb5b |
713 | |
714 | if ((a & 0xfff0) == 0x5180) { // a15180 |
be2c4208 |
715 | p32x_vdp_write8(a, d); |
716 | return; |
717 | } |
718 | |
974fdb5b |
719 | // TODO: verify |
720 | if ((a & 0xfe00) == 0x5200) { // a15200 |
721 | elprintf(EL_32X|EL_ANOMALY, "m68k 32x PAL w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
722 | ((u8 *)Pico32xMem->pal)[(a & 0x1ff) ^ 1] = d; |
723 | Pico32x.dirty_pal = 1; |
724 | return; |
725 | } |
726 | |
be2c4208 |
727 | elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
728 | } |
729 | |
83ff19ec |
730 | static void PicoWrite16_32x_on(u32 a, u32 d) |
be2c4208 |
731 | { |
732 | if ((a & 0xfc00) == 0x5000) |
733 | elprintf(EL_UIO, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
734 | |
735 | if ((a & 0xffc0) == 0x5100) { // a15100 |
736 | p32x_reg_write16(a, d); |
737 | return; |
738 | } |
739 | |
83ff19ec |
740 | if ((a & 0xfc00) != 0x5000) { |
741 | PicoWrite16_io(a, d); |
742 | return; |
743 | } |
974fdb5b |
744 | |
745 | if ((a & 0xfff0) == 0x5180) { // a15180 |
be2c4208 |
746 | p32x_vdp_write16(a, d); |
747 | return; |
748 | } |
749 | |
974fdb5b |
750 | if ((a & 0xfe00) == 0x5200) { // a15200 |
751 | Pico32xMem->pal[(a & 0x1ff) / 2] = d; |
752 | Pico32x.dirty_pal = 1; |
753 | return; |
754 | } |
755 | |
be2c4208 |
756 | elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
757 | } |
758 | |
83ff19ec |
759 | // before ADEN |
760 | u32 PicoRead8_32x(u32 a) |
761 | { |
762 | u32 d = 0; |
763 | if ((a & 0xffc0) == 0x5100) { // a15100 |
764 | // regs are always readable |
765 | d = ((u8 *)Pico32x.regs)[(a & 0x3f) ^ 1]; |
766 | goto out; |
767 | } |
768 | |
769 | if ((a & 0xfffc) == 0x30ec) { // a130ec |
770 | d = str_mars[a & 3]; |
771 | goto out; |
772 | } |
773 | |
774 | elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc); |
775 | return d; |
776 | |
777 | out: |
778 | elprintf(EL_32X, "m68k 32x r8 [%06x] %02x @%06x", a, d, SekPc); |
779 | return d; |
780 | } |
781 | |
782 | u32 PicoRead16_32x(u32 a) |
783 | { |
784 | u32 d = 0; |
785 | if ((a & 0xffc0) == 0x5100) { // a15100 |
786 | d = Pico32x.regs[(a & 0x3f) / 2]; |
787 | goto out; |
788 | } |
789 | |
790 | if ((a & 0xfffc) == 0x30ec) { // a130ec |
791 | d = !(a & 2) ? ('M'<<8)|'A' : ('R'<<8)|'S'; |
792 | goto out; |
793 | } |
794 | |
795 | elprintf(EL_UIO, "m68k unmapped r16 [%06x] @%06x", a, SekPc); |
796 | return d; |
797 | |
798 | out: |
799 | elprintf(EL_32X, "m68k 32x r16 [%06x] %04x @%06x", a, d, SekPc); |
800 | return d; |
801 | } |
802 | |
803 | void PicoWrite8_32x(u32 a, u32 d) |
804 | { |
805 | if ((a & 0xffc0) == 0x5100) { // a15100 |
806 | u16 *r = Pico32x.regs; |
807 | |
808 | elprintf(EL_32X, "m68k 32x w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
809 | a &= 0x3f; |
810 | if (a == 1) { |
811 | if ((d ^ r[0]) & d & P32XS_ADEN) { |
812 | Pico32xStartup(); |
813 | r[0] &= ~P32XS_nRES; // causes reset if specified by this write |
814 | r[0] |= P32XS_ADEN; |
815 | p32x_reg_write8(a, d); // forward for reset processing |
816 | } |
817 | return; |
818 | } |
819 | |
820 | // allow only COMM for now |
821 | if ((a & 0x30) == 0x20) { |
822 | u8 *r8 = (u8 *)r; |
823 | r8[a ^ 1] = d; |
824 | } |
825 | return; |
826 | } |
827 | |
828 | elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
829 | } |
830 | |
831 | void PicoWrite16_32x(u32 a, u32 d) |
832 | { |
833 | if ((a & 0xffc0) == 0x5100) { // a15100 |
834 | u16 *r = Pico32x.regs; |
835 | |
836 | elprintf(EL_UIO, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
837 | a &= 0x3e; |
838 | if (a == 0) { |
839 | if ((d ^ r[0]) & d & P32XS_ADEN) { |
840 | Pico32xStartup(); |
841 | r[0] &= ~P32XS_nRES; // causes reset if specified by this write |
842 | r[0] |= P32XS_ADEN; |
843 | p32x_reg_write16(a, d); // forward for reset processing |
844 | } |
845 | return; |
846 | } |
847 | |
848 | // allow only COMM for now |
849 | if ((a & 0x30) == 0x20) |
850 | r[a / 2] = d; |
851 | return; |
852 | } |
853 | |
854 | elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
855 | } |
856 | |
857 | // ----------------------------------------------------------------- |
858 | |
be2c4208 |
859 | // hint vector is writeable |
860 | static void PicoWrite8_hint(u32 a, u32 d) |
861 | { |
862 | if ((a & 0xfffc) == 0x0070) { |
863 | Pico32xMem->m68k_rom[a ^ 1] = d; |
864 | return; |
865 | } |
866 | |
867 | elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
868 | } |
869 | |
870 | static void PicoWrite16_hint(u32 a, u32 d) |
871 | { |
872 | if ((a & 0xfffc) == 0x0070) { |
873 | ((u16 *)Pico32xMem->m68k_rom)[a/2] = d; |
874 | return; |
875 | } |
876 | |
877 | elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
878 | } |
879 | |
974fdb5b |
880 | void Pico32xSwapDRAM(int b) |
881 | { |
882 | cpu68k_map_set(m68k_read8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); |
883 | cpu68k_map_set(m68k_read16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); |
884 | cpu68k_map_set(m68k_write8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); |
885 | cpu68k_map_set(m68k_write16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); |
886 | } |
887 | |
5e49c3a8 |
888 | static void bank_switch(int b) |
889 | { |
890 | unsigned int rs, bank; |
891 | |
892 | bank = b << 20; |
893 | if (bank >= Pico.romsize) { |
894 | elprintf(EL_32X|EL_ANOMALY, "missing bank @ %06x", bank); |
895 | return; |
896 | } |
897 | |
898 | // 32X ROM (unbanked, XXX: consider mirroring?) |
899 | rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK; |
900 | rs -= bank; |
901 | if (rs > 0x100000) |
902 | rs = 0x100000; |
903 | cpu68k_map_set(m68k_read8_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0); |
904 | cpu68k_map_set(m68k_read16_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0); |
905 | |
906 | elprintf(EL_32X, "bank %06x-%06x -> %06x", 0x900000, 0x900000 + rs - 1, bank); |
602c28ca |
907 | |
908 | #ifdef EMU_F68K |
909 | // setup FAME fetchmap |
910 | for (rs = 0x90; rs < 0xa0; rs++) |
911 | PicoCpuFM68k.Fetch[rs] = (u32)Pico.rom + bank - 0x900000; |
912 | #endif |
5e49c3a8 |
913 | } |
914 | |
acd35d4c |
915 | // ----------------------------------------------------------------- |
916 | // SH2 |
917 | // ----------------------------------------------------------------- |
918 | |
b78efee2 |
919 | u32 p32x_sh2_read8(u32 a, int id) |
acd35d4c |
920 | { |
921 | u32 d = 0; |
4ea707e1 |
922 | |
b78efee2 |
923 | if (id == 0 && a < sizeof(Pico32xMem->sh2_rom_m)) |
acd35d4c |
924 | return Pico32xMem->sh2_rom_m[a ^ 1]; |
b78efee2 |
925 | if (id == 1 && a < sizeof(Pico32xMem->sh2_rom_s)) |
926 | return Pico32xMem->sh2_rom_s[a ^ 1]; |
acd35d4c |
927 | |
87accdf7 |
928 | if ((a & 0xdffc0000) == 0x06000000) |
acd35d4c |
929 | return Pico32xMem->sdram[(a & 0x3ffff) ^ 1]; |
930 | |
87accdf7 |
931 | if ((a & 0xdfc00000) == 0x02000000) |
acd35d4c |
932 | if ((a & 0x003fffff) < Pico.romsize) |
933 | return Pico.rom[(a & 0x3fffff) ^ 1]; |
934 | |
b78efee2 |
935 | if ((a & ~0xfff) == 0xc0000000) |
936 | return Pico32xMem->data_array[id][(a & 0xfff) ^ 1]; |
937 | |
c987bb5c |
938 | if ((a & 0xdffc0000) == 0x04000000) { |
939 | /* XXX: overwrite readable as normal? */ |
97d3f47f |
940 | u8 *dram = (u8 *)Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1]; |
941 | return dram[(a & 0x1ffff) ^ 1]; |
942 | } |
943 | |
87accdf7 |
944 | if ((a & 0xdfffff00) == 0x4000) { |
b78efee2 |
945 | d = p32x_sh2reg_read16(a, id); |
db1d3564 |
946 | goto out_16to8; |
acd35d4c |
947 | } |
948 | |
87accdf7 |
949 | if ((a & 0xdfffff00) == 0x4100) { |
acd35d4c |
950 | d = p32x_vdp_read16(a); |
be20816c |
951 | if (p32x_poll_detect(&sh2_poll[id], a, ash2_cycles_done(), 1)) |
db1d3564 |
952 | ash2_end_run(8); |
953 | goto out_16to8; |
acd35d4c |
954 | } |
955 | |
87accdf7 |
956 | if ((a & 0xdfffff00) == 0x4200) { |
acd35d4c |
957 | d = Pico32xMem->pal[(a & 0x1ff) / 2]; |
958 | goto out_16to8; |
959 | } |
960 | |
87accdf7 |
961 | if ((a & 0xfffffe00) == 0xfffffe00) |
962 | return sh2_peripheral_read8(a, id); |
963 | |
b78efee2 |
964 | elprintf(EL_UIO, "%csh2 unmapped r8 [%08x] %02x @%06x", |
965 | id ? 's' : 'm', a, d, sh2_pc(id)); |
acd35d4c |
966 | return d; |
967 | |
968 | out_16to8: |
969 | if (a & 1) |
970 | d &= 0xff; |
971 | else |
972 | d >>= 8; |
973 | |
b78efee2 |
974 | elprintf(EL_32X, "%csh2 r8 [%08x] %02x @%06x", |
975 | id ? 's' : 'm', a, d, sh2_pc(id)); |
acd35d4c |
976 | return d; |
977 | } |
978 | |
b78efee2 |
979 | u32 p32x_sh2_read16(u32 a, int id) |
acd35d4c |
980 | { |
981 | u32 d = 0; |
3cf9570b |
982 | |
b78efee2 |
983 | if (id == 0 && a < sizeof(Pico32xMem->sh2_rom_m)) |
acd35d4c |
984 | return *(u16 *)(Pico32xMem->sh2_rom_m + a); |
b78efee2 |
985 | if (id == 1 && a < sizeof(Pico32xMem->sh2_rom_s)) |
986 | return *(u16 *)(Pico32xMem->sh2_rom_s + a); |
acd35d4c |
987 | |
87accdf7 |
988 | if ((a & 0xdffc0000) == 0x06000000) |
acd35d4c |
989 | return ((u16 *)Pico32xMem->sdram)[(a & 0x3ffff) / 2]; |
990 | |
87accdf7 |
991 | if ((a & 0xdfc00000) == 0x02000000) |
acd35d4c |
992 | if ((a & 0x003fffff) < Pico.romsize) |
993 | return ((u16 *)Pico.rom)[(a & 0x3fffff) / 2]; |
994 | |
b78efee2 |
995 | if ((a & ~0xfff) == 0xc0000000) |
996 | return ((u16 *)Pico32xMem->data_array[id])[(a & 0xfff) / 2]; |
997 | |
87accdf7 |
998 | if ((a & 0xdffe0000) == 0x04000000) |
97d3f47f |
999 | return Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1][(a & 0x1ffff) / 2]; |
1000 | |
87accdf7 |
1001 | if ((a & 0xdfffff00) == 0x4000) { |
b78efee2 |
1002 | d = p32x_sh2reg_read16(a, id); |
1b3f5844 |
1003 | if (!(EL_LOGMASK & EL_PWM) && (a & 0x30) == 0x30) // hide PWM |
1004 | return d; |
db1d3564 |
1005 | goto out; |
acd35d4c |
1006 | } |
1007 | |
87accdf7 |
1008 | if ((a & 0xdfffff00) == 0x4100) { |
acd35d4c |
1009 | d = p32x_vdp_read16(a); |
be20816c |
1010 | if (p32x_poll_detect(&sh2_poll[id], a, ash2_cycles_done(), 1)) |
db1d3564 |
1011 | ash2_end_run(8); |
1012 | goto out; |
acd35d4c |
1013 | } |
1014 | |
87accdf7 |
1015 | if ((a & 0xdfffff00) == 0x4200) { |
acd35d4c |
1016 | d = Pico32xMem->pal[(a & 0x1ff) / 2]; |
1017 | goto out; |
1018 | } |
1019 | |
1d7a28a7 |
1020 | if ((a & 0xfffffe00) == 0xfffffe00) |
1021 | return sh2_peripheral_read16(a, id); |
1022 | |
b78efee2 |
1023 | elprintf(EL_UIO, "%csh2 unmapped r16 [%08x] %04x @%06x", |
1024 | id ? 's' : 'm', a, d, sh2_pc(id)); |
acd35d4c |
1025 | return d; |
1026 | |
1027 | out: |
b78efee2 |
1028 | elprintf(EL_32X, "%csh2 r16 [%08x] %04x @%06x", |
1029 | id ? 's' : 'm', a, d, sh2_pc(id)); |
acd35d4c |
1030 | return d; |
1031 | } |
1032 | |
b78efee2 |
1033 | u32 p32x_sh2_read32(u32 a, int id) |
acd35d4c |
1034 | { |
4ea707e1 |
1035 | if ((a & 0xfffffe00) == 0xfffffe00) |
87accdf7 |
1036 | return sh2_peripheral_read32(a, id); |
4ea707e1 |
1037 | |
acd35d4c |
1038 | // elprintf(EL_UIO, "sh2 r32 [%08x] %08x @%06x", a, d, ash2_pc()); |
b78efee2 |
1039 | return (p32x_sh2_read16(a, id) << 16) | p32x_sh2_read16(a + 2, id); |
acd35d4c |
1040 | } |
1041 | |
b78efee2 |
1042 | void p32x_sh2_write8(u32 a, u32 d, int id) |
acd35d4c |
1043 | { |
87accdf7 |
1044 | if ((a & 0xdffffc00) == 0x4000) |
b78efee2 |
1045 | elprintf(EL_32X, "%csh2 w8 [%08x] %02x @%06x", |
1046 | id ? 's' : 'm', a, d & 0xff, sh2_pc(id)); |
acd35d4c |
1047 | |
87accdf7 |
1048 | if ((a & 0xdffc0000) == 0x06000000) { |
acd35d4c |
1049 | Pico32xMem->sdram[(a & 0x3ffff) ^ 1] = d; |
1050 | return; |
1051 | } |
1052 | |
87accdf7 |
1053 | if ((a & 0xdffc0000) == 0x04000000) { |
1054 | u8 *dram; |
1055 | if (!(a & 0x20000) || d) { |
1056 | dram = (u8 *)Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1]; |
1057 | dram[(a & 0x1ffff) ^ 1] = d; |
87accdf7 |
1058 | } |
c987bb5c |
1059 | return; |
266c6afa |
1060 | } |
1061 | |
b78efee2 |
1062 | if ((a & ~0xfff) == 0xc0000000) { |
1063 | Pico32xMem->data_array[id][(a & 0xfff) ^ 1] = d; |
1064 | return; |
1065 | } |
1066 | |
87accdf7 |
1067 | if ((a & 0xdfffff00) == 0x4100) { |
acd35d4c |
1068 | p32x_vdp_write8(a, d); |
1069 | return; |
1070 | } |
1071 | |
87accdf7 |
1072 | if ((a & 0xdfffff00) == 0x4000) { |
b78efee2 |
1073 | p32x_sh2reg_write8(a, d, id); |
acd35d4c |
1074 | return; |
1075 | } |
1076 | |
87accdf7 |
1077 | if ((a & 0xfffffe00) == 0xfffffe00) { |
1078 | sh2_peripheral_write8(a, d, id); |
1079 | return; |
1080 | } |
1081 | |
b78efee2 |
1082 | elprintf(EL_UIO, "%csh2 unmapped w8 [%08x] %02x @%06x", |
1083 | id ? 's' : 'm', a, d & 0xff, sh2_pc(id)); |
acd35d4c |
1084 | } |
1085 | |
b78efee2 |
1086 | void p32x_sh2_write16(u32 a, u32 d, int id) |
acd35d4c |
1087 | { |
1b3f5844 |
1088 | if ((a & 0xdffffc00) == 0x4000 && ((EL_LOGMASK & EL_PWM) || (a & 0x30) != 0x30)) // hide PWM |
b78efee2 |
1089 | elprintf(EL_32X, "%csh2 w16 [%08x] %04x @%06x", |
1090 | id ? 's' : 'm', a, d & 0xffff, sh2_pc(id)); |
acd35d4c |
1091 | |
87accdf7 |
1092 | // ignore "Associative purge space" |
1093 | if ((a & 0xf8000000) == 0x40000000) |
1094 | return; |
1095 | |
1096 | if ((a & 0xdffc0000) == 0x06000000) { |
acd35d4c |
1097 | ((u16 *)Pico32xMem->sdram)[(a & 0x3ffff) / 2] = d; |
1098 | return; |
1099 | } |
1100 | |
b78efee2 |
1101 | if ((a & ~0xfff) == 0xc0000000) { |
1102 | ((u16 *)Pico32xMem->data_array[id])[(a & 0xfff) / 2] = d; |
1103 | return; |
1104 | } |
1105 | |
87accdf7 |
1106 | if ((a & 0xdffc0000) == 0x04000000) { |
1107 | u16 *pd = &Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1][(a & 0x1ffff) / 2]; |
1108 | if (!(a & 0x20000)) { |
1109 | *pd = d; |
1110 | return; |
1111 | } |
1112 | // overwrite |
1113 | if (!(d & 0xff00)) d |= *pd & 0xff00; |
1114 | if (!(d & 0x00ff)) d |= *pd & 0x00ff; |
1115 | *pd = d; |
266c6afa |
1116 | return; |
1117 | } |
1118 | |
87accdf7 |
1119 | if ((a & 0xdfffff00) == 0x4100) { |
be20816c |
1120 | sh2_poll[id].cnt = 0; // for poll before VDP accesses |
acd35d4c |
1121 | p32x_vdp_write16(a, d); |
1122 | return; |
1123 | } |
1124 | |
87accdf7 |
1125 | if ((a & 0xdffffe00) == 0x4200) { |
acd35d4c |
1126 | Pico32xMem->pal[(a & 0x1ff) / 2] = d; |
1127 | Pico32x.dirty_pal = 1; |
1128 | return; |
1129 | } |
1130 | |
87accdf7 |
1131 | if ((a & 0xdfffff00) == 0x4000) { |
b78efee2 |
1132 | p32x_sh2reg_write16(a, d, id); |
acd35d4c |
1133 | return; |
1134 | } |
1135 | |
1d7a28a7 |
1136 | if ((a & 0xfffffe00) == 0xfffffe00) { |
1137 | sh2_peripheral_write16(a, d, id); |
1138 | return; |
1139 | } |
1140 | |
b78efee2 |
1141 | elprintf(EL_UIO, "%csh2 unmapped w16 [%08x] %04x @%06x", |
1142 | id ? 's' : 'm', a, d & 0xffff, sh2_pc(id)); |
acd35d4c |
1143 | } |
1144 | |
b78efee2 |
1145 | void p32x_sh2_write32(u32 a, u32 d, int id) |
acd35d4c |
1146 | { |
4ea707e1 |
1147 | if ((a & 0xfffffe00) == 0xfffffe00) { |
87accdf7 |
1148 | sh2_peripheral_write32(a, d, id); |
4ea707e1 |
1149 | return; |
1150 | } |
1151 | |
b78efee2 |
1152 | p32x_sh2_write16(a, d >> 16, id); |
1153 | p32x_sh2_write16(a + 2, d, id); |
acd35d4c |
1154 | } |
1155 | |
83ff19ec |
1156 | static const u16 msh2_code[] = { |
1157 | // trap instructions |
1158 | 0xaffe, // bra <self> |
1159 | 0x0009, // nop |
1160 | // have to wait a bit until m68k initial program finishes clearing stuff |
1161 | // to avoid races with game SH2 code, like in Tempo |
1162 | 0xd004, // mov.l @(_m_ok,pc), r0 |
1163 | 0xd105, // mov.l @(_cnt,pc), r1 |
1164 | 0xd205, // mov.l @(_start,pc), r2 |
1165 | 0x71ff, // add #-1, r1 |
1166 | 0x4115, // cmp/pl r1 |
1167 | 0x89fc, // bt -2 |
1168 | 0xc208, // mov.l r0, @(h'20,gbr) |
1169 | 0x6822, // mov.l @r2, r8 |
1170 | 0x482b, // jmp @r8 |
1171 | 0x0009, // nop |
1172 | ('M'<<8)|'_', ('O'<<8)|'K', |
1173 | 0x0001, 0x0000, |
1174 | 0x2200, 0x03e0 // master start pointer in ROM |
1175 | }; |
1176 | |
1177 | static const u16 ssh2_code[] = { |
1178 | 0xaffe, // bra <self> |
1179 | 0x0009, // nop |
1180 | // code to wait for master, in case authentic master BIOS is used |
1181 | 0xd104, // mov.l @(_m_ok,pc), r1 |
1182 | 0xd206, // mov.l @(_start,pc), r2 |
1183 | 0xc608, // mov.l @(h'20,gbr), r0 |
1184 | 0x3100, // cmp/eq r0, r1 |
1185 | 0x8bfc, // bf #-2 |
1186 | 0xd003, // mov.l @(_s_ok,pc), r0 |
1187 | 0xc209, // mov.l r0, @(h'24,gbr) |
1188 | 0x6822, // mov.l @r2, r8 |
1189 | 0x482b, // jmp @r8 |
1190 | 0x0009, // nop |
1191 | ('M'<<8)|'_', ('O'<<8)|'K', |
1192 | ('S'<<8)|'_', ('O'<<8)|'K', |
1193 | 0x2200, 0x03e4 // slave start pointer in ROM |
1194 | }; |
1195 | |
be2c4208 |
1196 | #define HWSWAP(x) (((x) << 16) | ((x) >> 16)) |
83ff19ec |
1197 | static void get_bios(void) |
be2c4208 |
1198 | { |
83ff19ec |
1199 | u16 *ps; |
1200 | u32 *pl; |
be2c4208 |
1201 | int i; |
1202 | |
83ff19ec |
1203 | // M68K ROM |
1204 | if (p32x_bios_g != NULL) { |
1205 | elprintf(EL_STATUS|EL_32X, "32x: using supplied 68k BIOS"); |
1206 | Byteswap(Pico32xMem->m68k_rom, p32x_bios_g, 0x100); |
be2c4208 |
1207 | } |
83ff19ec |
1208 | else { |
1209 | // generate 68k ROM |
1210 | ps = (u16 *)Pico32xMem->m68k_rom; |
1211 | pl = (u32 *)ps; |
1212 | for (i = 1; i < 0xc0/4; i++) |
1213 | pl[i] = HWSWAP(0x880200 + (i - 1) * 6); |
be2c4208 |
1214 | |
83ff19ec |
1215 | // fill with nops |
1216 | for (i = 0xc0/2; i < 0x100/2; i++) |
1217 | ps[i] = 0x4e71; |
be2c4208 |
1218 | |
5e49c3a8 |
1219 | #if 0 |
83ff19ec |
1220 | ps[0xc0/2] = 0x46fc; |
1221 | ps[0xc2/2] = 0x2700; // move #0x2700,sr |
1222 | ps[0xfe/2] = 0x60fe; // jump to self |
5e49c3a8 |
1223 | #else |
83ff19ec |
1224 | ps[0xfe/2] = 0x4e75; // rts |
5e49c3a8 |
1225 | #endif |
83ff19ec |
1226 | } |
1227 | // fill remaining m68k_rom page with game ROM |
974fdb5b |
1228 | memcpy(Pico32xMem->m68k_rom + 0x100, Pico.rom + 0x100, sizeof(Pico32xMem->m68k_rom) - 0x100); |
be2c4208 |
1229 | |
83ff19ec |
1230 | // MSH2 |
1231 | if (p32x_bios_m != NULL) { |
1232 | elprintf(EL_STATUS|EL_32X, "32x: using supplied master SH2 BIOS"); |
1233 | Byteswap(Pico32xMem->sh2_rom_m, p32x_bios_m, sizeof(Pico32xMem->sh2_rom_m)); |
acd35d4c |
1234 | } |
83ff19ec |
1235 | else { |
1236 | pl = (u32 *)Pico32xMem->sh2_rom_m; |
1237 | |
1238 | // fill exception vector table to our trap address |
1239 | for (i = 0; i < 128; i++) |
1240 | pl[i] = HWSWAP(0x200); |
1241 | |
1242 | // startup code |
1243 | memcpy(Pico32xMem->sh2_rom_m + 0x200, msh2_code, sizeof(msh2_code)); |
1244 | |
1245 | // reset SP |
1246 | pl[1] = pl[3] = HWSWAP(0x6040000); |
1247 | // start |
1248 | pl[0] = pl[2] = HWSWAP(0x204); |
1249 | } |
1250 | |
1251 | // SSH2 |
1252 | if (p32x_bios_s != NULL) { |
1253 | elprintf(EL_STATUS|EL_32X, "32x: using supplied slave SH2 BIOS"); |
1254 | Byteswap(Pico32xMem->sh2_rom_s, p32x_bios_s, sizeof(Pico32xMem->sh2_rom_s)); |
1255 | } |
1256 | else { |
1257 | pl = (u32 *)Pico32xMem->sh2_rom_s; |
1258 | |
1259 | // fill exception vector table to our trap address |
1260 | for (i = 0; i < 128; i++) |
1261 | pl[i] = HWSWAP(0x200); |
1262 | |
1263 | // startup code |
1264 | memcpy(Pico32xMem->sh2_rom_s + 0x200, ssh2_code, sizeof(ssh2_code)); |
1265 | |
1266 | // reset SP |
1267 | pl[1] = pl[3] = HWSWAP(0x603f800); |
1268 | // start |
1269 | pl[0] = pl[2] = HWSWAP(0x204); |
1270 | } |
1271 | } |
1272 | |
1273 | void PicoMemSetup32x(void) |
1274 | { |
1275 | unsigned int rs; |
1276 | |
1277 | Pico32xMem = calloc(1, sizeof(*Pico32xMem)); |
1278 | if (Pico32xMem == NULL) { |
1279 | elprintf(EL_STATUS, "OOM"); |
1280 | return; |
1281 | } |
1282 | |
1283 | dmac0 = (void *)&Pico32xMem->sh2_peri_regs[0][0x180 / 4]; |
1284 | |
1285 | get_bios(); |
acd35d4c |
1286 | |
be2c4208 |
1287 | // cartridge area becomes unmapped |
1288 | // XXX: we take the easy way and don't unmap ROM, |
1289 | // so that we can avoid handling the RV bit. |
1290 | // m68k_map_unmap(0x000000, 0x3fffff); |
1291 | |
1292 | // MD ROM area |
974fdb5b |
1293 | rs = sizeof(Pico32xMem->m68k_rom); |
1294 | cpu68k_map_set(m68k_read8_map, 0x000000, rs - 1, Pico32xMem->m68k_rom, 0); |
1295 | cpu68k_map_set(m68k_read16_map, 0x000000, rs - 1, Pico32xMem->m68k_rom, 0); |
1296 | cpu68k_map_set(m68k_write8_map, 0x000000, rs - 1, PicoWrite8_hint, 1); // TODO verify |
1297 | cpu68k_map_set(m68k_write16_map, 0x000000, rs - 1, PicoWrite16_hint, 1); |
1298 | |
1299 | // DRAM area |
1300 | Pico32xSwapDRAM(1); |
be2c4208 |
1301 | |
1302 | // 32X ROM (unbanked, XXX: consider mirroring?) |
5e49c3a8 |
1303 | rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK; |
1304 | if (rs > 0x80000) |
1305 | rs = 0x80000; |
1306 | cpu68k_map_set(m68k_read8_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0); |
1307 | cpu68k_map_set(m68k_read16_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0); |
602c28ca |
1308 | #ifdef EMU_F68K |
1309 | // setup FAME fetchmap |
1310 | PicoCpuFM68k.Fetch[0] = (u32)Pico32xMem->m68k_rom; |
1311 | for (rs = 0x88; rs < 0x90; rs++) |
1312 | PicoCpuFM68k.Fetch[rs] = (u32)Pico.rom - 0x880000; |
1313 | #endif |
be2c4208 |
1314 | |
1315 | // 32X ROM (banked) |
5e49c3a8 |
1316 | bank_switch(0); |
b78efee2 |
1317 | |
83ff19ec |
1318 | // SYS regs |
1319 | cpu68k_map_set(m68k_read8_map, 0xa10000, 0xa1ffff, PicoRead8_32x_on, 1); |
1320 | cpu68k_map_set(m68k_read16_map, 0xa10000, 0xa1ffff, PicoRead16_32x_on, 1); |
1321 | cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, PicoWrite8_32x_on, 1); |
1322 | cpu68k_map_set(m68k_write16_map, 0xa10000, 0xa1ffff, PicoWrite16_32x_on, 1); |
1323 | |
b78efee2 |
1324 | // setup poll detector |
1325 | m68k_poll.flag = P32XF_68KPOLL; |
be20816c |
1326 | m68k_poll.cyc_max = 64; |
b78efee2 |
1327 | sh2_poll[0].flag = P32XF_MSH2POLL; |
1d7a28a7 |
1328 | sh2_poll[0].cyc_max = 21; |
b78efee2 |
1329 | sh2_poll[1].flag = P32XF_SSH2POLL; |
be20816c |
1330 | sh2_poll[1].cyc_max = 16; |
be2c4208 |
1331 | } |
1332 | |