| 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 | */ |
| 20 | #include "../pico_int.h" |
| 21 | #include "../memory.h" |
| 22 | |
| 23 | #if 0 |
| 24 | #undef ash2_end_run |
| 25 | #undef SekEndRun |
| 26 | #define ash2_end_run(x) |
| 27 | #define SekEndRun(x) |
| 28 | #endif |
| 29 | |
| 30 | static const char str_mars[] = "MARS"; |
| 31 | |
| 32 | void *p32x_bios_g, *p32x_bios_m, *p32x_bios_s; |
| 33 | struct Pico32xMem *Pico32xMem; |
| 34 | |
| 35 | static void bank_switch(int b); |
| 36 | |
| 37 | // poll detection |
| 38 | #define POLL_THRESHOLD 6 |
| 39 | |
| 40 | struct poll_det { |
| 41 | u32 addr, cycles, cyc_max; |
| 42 | int cnt, flag; |
| 43 | }; |
| 44 | static struct poll_det m68k_poll, sh2_poll[2]; |
| 45 | |
| 46 | static int p32x_poll_detect(struct poll_det *pd, u32 a, u32 cycles, int is_vdp) |
| 47 | { |
| 48 | int ret = 0, flag = pd->flag; |
| 49 | |
| 50 | if (is_vdp) |
| 51 | flag <<= 3; |
| 52 | |
| 53 | if (a - 2 <= pd->addr && pd->addr <= a + 2 && cycles - pd->cycles <= pd->cyc_max) { |
| 54 | pd->cnt++; |
| 55 | if (pd->cnt > POLL_THRESHOLD) { |
| 56 | if (!(Pico32x.emu_flags & flag)) { |
| 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); |
| 60 | ret = 1; |
| 61 | } |
| 62 | Pico32x.emu_flags |= flag; |
| 63 | } |
| 64 | } |
| 65 | else { |
| 66 | pd->cnt = 0; |
| 67 | pd->addr = a; |
| 68 | } |
| 69 | pd->cycles = cycles; |
| 70 | |
| 71 | return ret; |
| 72 | } |
| 73 | |
| 74 | static int p32x_poll_undetect(struct poll_det *pd, int is_vdp) |
| 75 | { |
| 76 | int ret = 0, flag = pd->flag; |
| 77 | if (is_vdp) |
| 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); |
| 83 | ret = 1; |
| 84 | } |
| 85 | Pico32x.emu_flags &= ~flag; |
| 86 | pd->addr = pd->cnt = 0; |
| 87 | return ret; |
| 88 | } |
| 89 | |
| 90 | void p32x_poll_event(int cpu_mask, int is_vdp) |
| 91 | { |
| 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); |
| 96 | } |
| 97 | |
| 98 | // SH2 faking |
| 99 | //#define FAKE_SH2 |
| 100 | int p32x_csum_faked; |
| 101 | #ifdef FAKE_SH2 |
| 102 | static const u16 comm_fakevals[] = { |
| 103 | 0x4d5f, 0x4f4b, // M_OK |
| 104 | 0x535f, 0x4f4b, // S_OK |
| 105 | 0x4D41, 0x5346, // MASF - Brutal Unleashed |
| 106 | 0x5331, 0x4d31, // Darxide |
| 107 | 0x5332, 0x4d32, |
| 108 | 0x5333, 0x4d33, |
| 109 | 0x0000, 0x0000, // eq for doom |
| 110 | 0x0002, // Mortal Kombat |
| 111 | // 0, // pad |
| 112 | }; |
| 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 |
| 126 | |
| 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 | |
| 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 | |
| 149 | for (i = 0; i < Pico32x.dmac_ptr && dmac0->tcr0 > 0; i++) { |
| 150 | extern void p32x_sh2_write16(u32 a, u32 d, int id); |
| 151 | elprintf(EL_32X, "dmaw [%08x] %04x, left %d", dmac0->dar0, Pico32x.dmac_fifo[i], *dreqlen); |
| 152 | p32x_sh2_write16(dmac0->dar0, Pico32x.dmac_fifo[i], 0); |
| 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 |
| 162 | if (dmac0->tcr0 == 0) { |
| 163 | dmac0->chcr0 |= 2; // DMA has ended normally |
| 164 | p32x_poll_undetect(&sh2_poll[0], 0); |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | // ------------------------------------------------------------------ |
| 169 | // 68k regs |
| 170 | |
| 171 | static u32 p32x_reg_read16(u32 a) |
| 172 | { |
| 173 | a &= 0x3e; |
| 174 | |
| 175 | if (a == 2) // INTM, INTS |
| 176 | return ((Pico32x.sh2irqi[0] & P32XI_CMD) >> 4) | ((Pico32x.sh2irqi[1] & P32XI_CMD) >> 3); |
| 177 | #if 0 |
| 178 | if ((a & 0x30) == 0x20) |
| 179 | return sh2_comm_faker(a); |
| 180 | #else |
| 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); |
| 193 | } |
| 194 | #endif |
| 195 | |
| 196 | if ((a & 0x30) == 0x30) |
| 197 | return p32x_pwm_read16(a); |
| 198 | |
| 199 | return Pico32x.regs[a / 2]; |
| 200 | } |
| 201 | |
| 202 | static void p32x_reg_write8(u32 a, u32 d) |
| 203 | { |
| 204 | u16 *r = Pico32x.regs; |
| 205 | a &= 0x3f; |
| 206 | |
| 207 | // for things like bset on comm port |
| 208 | m68k_poll.cnt = 0; |
| 209 | |
| 210 | switch (a) { |
| 211 | case 0: // adapter ctl |
| 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); |
| 218 | return; |
| 219 | case 3: // irq ctl |
| 220 | if ((d & 1) && !(Pico32x.sh2irqi[0] & P32XI_CMD)) { |
| 221 | Pico32x.sh2irqi[0] |= P32XI_CMD; |
| 222 | p32x_update_irls(); |
| 223 | SekEndRun(16); |
| 224 | } |
| 225 | if ((d & 2) && !(Pico32x.sh2irqi[1] & P32XI_CMD)) { |
| 226 | Pico32x.sh2irqi[1] |= P32XI_CMD; |
| 227 | p32x_update_irls(); |
| 228 | SekEndRun(16); |
| 229 | } |
| 230 | return; |
| 231 | case 5: // bank |
| 232 | d &= 7; |
| 233 | if (r[4 / 2] != d) { |
| 234 | r[4 / 2] = d; |
| 235 | bank_switch(d); |
| 236 | } |
| 237 | return; |
| 238 | case 7: // DREQ ctl |
| 239 | r[6 / 2] = (r[6 / 2] & P32XS_FULL) | (d & (P32XS_68S|P32XS_DMA|P32XS_RV)); |
| 240 | return; |
| 241 | case 0x1b: // TV |
| 242 | r[0x1a / 2] = d; |
| 243 | return; |
| 244 | } |
| 245 | |
| 246 | if ((a & 0x30) == 0x20) { |
| 247 | u8 *r8 = (u8 *)r; |
| 248 | r8[a ^ 1] = d; |
| 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); |
| 254 | return; |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | static void p32x_reg_write16(u32 a, u32 d) |
| 259 | { |
| 260 | u16 *r = Pico32x.regs; |
| 261 | a &= 0x3e; |
| 262 | |
| 263 | // for things like bset on comm port |
| 264 | m68k_poll.cnt = 0; |
| 265 | |
| 266 | switch (a) { |
| 267 | case 0x00: // adapter ctl |
| 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)); |
| 271 | return; |
| 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; |
| 288 | } |
| 289 | |
| 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) { |
| 297 | r[a / 2] = d; |
| 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); |
| 303 | return; |
| 304 | } |
| 305 | // PWM |
| 306 | else if ((a & 0x30) == 0x30) { |
| 307 | p32x_pwm_write16(a, d); |
| 308 | return; |
| 309 | } |
| 310 | |
| 311 | p32x_reg_write8(a + 1, d); |
| 312 | } |
| 313 | |
| 314 | // ------------------------------------------------------------------ |
| 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 | |
| 323 | static void p32x_vdp_write8(u32 a, u32 d) |
| 324 | { |
| 325 | u16 *r = Pico32x.vdp_regs; |
| 326 | a &= 0x0f; |
| 327 | |
| 328 | // for FEN checks between writes |
| 329 | sh2_poll[0].cnt = 0; |
| 330 | |
| 331 | // TODO: verify what's writeable |
| 332 | switch (a) { |
| 333 | case 0x01: |
| 334 | // priority inversion is handled in palette |
| 335 | if ((r[0] ^ d) & P32XV_PRI) |
| 336 | Pico32x.dirty_pal = 1; |
| 337 | r[0] = (r[0] & P32XV_nPAL) | (d & 0xff); |
| 338 | break; |
| 339 | case 0x05: // fill len |
| 340 | r[4 / 2] = d & 0xff; |
| 341 | break; |
| 342 | case 0x0b: |
| 343 | d &= 1; |
| 344 | Pico32x.pending_fb = d; |
| 345 | // if we are blanking and FS bit is changing |
| 346 | if (((r[0x0a/2] & P32XV_VBLK) || (r[0] & P32XV_Mx) == 0) && ((r[0x0a/2] ^ d) & P32XV_FS)) { |
| 347 | r[0x0a/2] ^= 1; |
| 348 | Pico32xSwapDRAM(d ^ 1); |
| 349 | elprintf(EL_32X, "VDP FS: %d", r[0x0a/2] & P32XV_FS); |
| 350 | } |
| 351 | break; |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | static void p32x_vdp_write16(u32 a, u32 d) |
| 356 | { |
| 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]; |
| 364 | int len = Pico32x.vdp_regs[4 / 2] + 1; |
| 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 | |
| 375 | p32x_vdp_write8(a | 1, d); |
| 376 | } |
| 377 | |
| 378 | // ------------------------------------------------------------------ |
| 379 | // SH2 regs |
| 380 | |
| 381 | static u32 p32x_sh2reg_read16(u32 a, int cpuid) |
| 382 | { |
| 383 | u16 *r = Pico32x.regs; |
| 384 | a &= 0xfe; // ? |
| 385 | |
| 386 | switch (a) { |
| 387 | case 0x00: // adapter/irq ctl |
| 388 | return (r[0] & P32XS_FM) | Pico32x.sh2_regs[0] | Pico32x.sh2irq_mask[cpuid]; |
| 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); |
| 392 | return Pico32x.sh2_regs[4 / 2]; |
| 393 | case 0x10: // DREQ len |
| 394 | return r[a / 2]; |
| 395 | } |
| 396 | |
| 397 | // DREQ src, dst |
| 398 | if ((a & 0x38) == 0x08) |
| 399 | return r[a / 2]; |
| 400 | // comm port |
| 401 | if ((a & 0x30) == 0x20) { |
| 402 | if (p32x_poll_detect(&sh2_poll[cpuid], a, ash2_cycles_done(), 0)) |
| 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 | } |
| 410 | |
| 411 | return 0; |
| 412 | } |
| 413 | |
| 414 | static void p32x_sh2reg_write8(u32 a, u32 d, int cpuid) |
| 415 | { |
| 416 | a &= 0xff; |
| 417 | switch (a) { |
| 418 | case 0: // FM |
| 419 | Pico32x.regs[0] &= ~P32XS_FM; |
| 420 | Pico32x.regs[0] |= (d << 8) & P32XS_FM; |
| 421 | return; |
| 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(); |
| 427 | return; |
| 428 | case 5: // H count |
| 429 | Pico32x.sh2_regs[4 / 2] = d & 0xff; |
| 430 | p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0); |
| 431 | return; |
| 432 | } |
| 433 | |
| 434 | if ((a & 0x30) == 0x20) { |
| 435 | u8 *r8 = (u8 *)Pico32x.regs; |
| 436 | r8[a ^ 1] = d; |
| 437 | if (p32x_poll_undetect(&m68k_poll, 0)) |
| 438 | SekSetStop(0); |
| 439 | p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0); |
| 440 | return; |
| 441 | } |
| 442 | } |
| 443 | |
| 444 | static void p32x_sh2reg_write16(u32 a, u32 d, int cpuid) |
| 445 | { |
| 446 | a &= 0xfe; |
| 447 | |
| 448 | // comm |
| 449 | if ((a & 0x30) == 0x20 && Pico32x.regs[a/2] != d) { |
| 450 | Pico32x.regs[a / 2] = d; |
| 451 | if (p32x_poll_undetect(&m68k_poll, 0)) |
| 452 | SekSetStop(0); |
| 453 | p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0); |
| 454 | return; |
| 455 | } |
| 456 | // PWM |
| 457 | else if ((a & 0x30) == 0x30) { |
| 458 | p32x_pwm_write16(a, d); |
| 459 | return; |
| 460 | } |
| 461 | |
| 462 | switch (a) { |
| 463 | case 0: // FM |
| 464 | Pico32x.regs[0] &= ~P32XS_FM; |
| 465 | Pico32x.regs[0] |= d & P32XS_FM; |
| 466 | break; |
| 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; |
| 470 | case 0x1a: Pico32x.sh2irqi[cpuid] &= ~P32XI_CMD; goto irls; |
| 471 | case 0x1c: |
| 472 | Pico32x.sh2irqs &= ~P32XI_PWM; |
| 473 | p32x_timers_do(0); |
| 474 | goto irls; |
| 475 | } |
| 476 | |
| 477 | p32x_sh2reg_write8(a | 1, d, cpuid); |
| 478 | return; |
| 479 | |
| 480 | irls: |
| 481 | p32x_update_irls(); |
| 482 | } |
| 483 | |
| 484 | // ------------------------------------------------------------------ |
| 485 | // SH2 internal peripherals |
| 486 | // we keep them in little endian format |
| 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; |
| 493 | d = PREG8(r, a); |
| 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 | |
| 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 | |
| 511 | static u32 sh2_peripheral_read32(u32 a, int id) |
| 512 | { |
| 513 | u32 d; |
| 514 | a &= 0x1fc; |
| 515 | d = Pico32xMem->sh2_peri_regs[id][a / 4]; |
| 516 | |
| 517 | elprintf(EL_32X, "%csh2 peri r32 [%08x] %08x @%06x", id ? 's' : 'm', a | ~0x1ff, d, sh2_pc(id)); |
| 518 | return d; |
| 519 | } |
| 520 | |
| 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; |
| 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; |
| 561 | } |
| 562 | |
| 563 | static void sh2_peripheral_write32(u32 a, u32 d, int id) |
| 564 | { |
| 565 | u32 *r = Pico32xMem->sh2_peri_regs[id]; |
| 566 | elprintf(EL_32X, "%csh2 peri w32 [%08x] %08x @%06x", id ? 's' : 'm', a, d, sh2_pc(id)); |
| 567 | |
| 568 | a &= 0x1fc; |
| 569 | r[a / 4] = d; |
| 570 | |
| 571 | switch (a) { |
| 572 | // division unit (TODO: verify): |
| 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]) { |
| 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; |
| 579 | } |
| 580 | break; |
| 581 | case 0x114: |
| 582 | elprintf(EL_32X, "%csh2 divide %08x%08x / %08x @%08x", |
| 583 | id ? 's' : 'm', r[0x110 / 4], d, r[0x100 / 4], sh2_pc(id)); |
| 584 | if (r[0x100 / 4]) { |
| 585 | signed long long divident = (signed long long)r[0x110 / 4] << 32 | d; |
| 586 | signed int divisor = r[0x100 / 4]; |
| 587 | // XXX: undocumented mirroring to 0x118,0x11c? |
| 588 | r[0x118 / 4] = r[0x110 / 4] = divident % divisor; |
| 589 | r[0x11c / 4] = r[0x114 / 4] = divident / divisor; |
| 590 | } |
| 591 | break; |
| 592 | } |
| 593 | |
| 594 | if ((a == 0x1b0 || a == 0x18c) && (dmac0->chcr0 & 3) == 1 && (dmac0->dmaor & 1)) { |
| 595 | elprintf(EL_32X, "sh2 DMA %08x -> %08x, cnt %d, chcr %04x @%06x", |
| 596 | dmac0->sar0, dmac0->dar0, dmac0->tcr0, dmac0->chcr0, sh2_pc(id)); |
| 597 | dmac0->tcr0 &= 0xffffff; |
| 598 | |
| 599 | // HACK: assume 68k starts writing soon and end the timeslice |
| 600 | ash2_end_run(16); |
| 601 | |
| 602 | // DREQ is only sent after first 4 words are written. |
| 603 | // we do multiple of 4 words to avoid messing up alignment |
| 604 | if (dmac0->sar0 == 0x20004012 && Pico32x.dmac_ptr && (Pico32x.dmac_ptr & 3) == 0) { |
| 605 | elprintf(EL_32X, "68k -> sh2 DMA"); |
| 606 | dma_68k2sh2_do(); |
| 607 | } |
| 608 | } |
| 609 | } |
| 610 | |
| 611 | // ------------------------------------------------------------------ |
| 612 | // 32x handlers |
| 613 | |
| 614 | // after ADEN |
| 615 | static u32 PicoRead8_32x_on(u32 a) |
| 616 | { |
| 617 | u32 d = 0; |
| 618 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| 619 | d = p32x_reg_read16(a); |
| 620 | goto out_16to8; |
| 621 | } |
| 622 | |
| 623 | if ((a & 0xfc00) != 0x5000) |
| 624 | return PicoRead8_io(a); |
| 625 | |
| 626 | if ((a & 0xfff0) == 0x5180) { // a15180 |
| 627 | d = p32x_vdp_read16(a); |
| 628 | goto out_16to8; |
| 629 | } |
| 630 | |
| 631 | if ((a & 0xfe00) == 0x5200) { // a15200 |
| 632 | d = Pico32xMem->pal[(a & 0x1ff) / 2]; |
| 633 | goto out_16to8; |
| 634 | } |
| 635 | |
| 636 | if ((a & 0xfffc) == 0x30ec) { // a130ec |
| 637 | d = str_mars[a & 3]; |
| 638 | goto out; |
| 639 | } |
| 640 | |
| 641 | elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc); |
| 642 | return d; |
| 643 | |
| 644 | out_16to8: |
| 645 | if (a & 1) |
| 646 | d &= 0xff; |
| 647 | else |
| 648 | d >>= 8; |
| 649 | |
| 650 | out: |
| 651 | elprintf(EL_32X, "m68k 32x r8 [%06x] %02x @%06x", a, d, SekPc); |
| 652 | return d; |
| 653 | } |
| 654 | |
| 655 | static u32 PicoRead16_32x_on(u32 a) |
| 656 | { |
| 657 | u32 d = 0; |
| 658 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| 659 | d = p32x_reg_read16(a); |
| 660 | goto out; |
| 661 | } |
| 662 | |
| 663 | if ((a & 0xfc00) != 0x5000) |
| 664 | return PicoRead16_io(a); |
| 665 | |
| 666 | if ((a & 0xfff0) == 0x5180) { // a15180 |
| 667 | d = p32x_vdp_read16(a); |
| 668 | goto out; |
| 669 | } |
| 670 | |
| 671 | if ((a & 0xfe00) == 0x5200) { // a15200 |
| 672 | d = Pico32xMem->pal[(a & 0x1ff) / 2]; |
| 673 | goto out; |
| 674 | } |
| 675 | |
| 676 | if ((a & 0xfffc) == 0x30ec) { // a130ec |
| 677 | d = !(a & 2) ? ('M'<<8)|'A' : ('R'<<8)|'S'; |
| 678 | goto out; |
| 679 | } |
| 680 | |
| 681 | elprintf(EL_UIO, "m68k unmapped r16 [%06x] @%06x", a, SekPc); |
| 682 | return d; |
| 683 | |
| 684 | out: |
| 685 | elprintf(EL_32X, "m68k 32x r16 [%06x] %04x @%06x", a, d, SekPc); |
| 686 | return d; |
| 687 | } |
| 688 | |
| 689 | static void PicoWrite8_32x_on(u32 a, u32 d) |
| 690 | { |
| 691 | if ((a & 0xfc00) == 0x5000) |
| 692 | elprintf(EL_32X, "m68k 32x w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
| 693 | |
| 694 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| 695 | p32x_reg_write8(a, d); |
| 696 | return; |
| 697 | } |
| 698 | |
| 699 | if ((a & 0xfc00) != 0x5000) { |
| 700 | PicoWrite8_io(a, d); |
| 701 | return; |
| 702 | } |
| 703 | |
| 704 | if ((a & 0xfff0) == 0x5180) { // a15180 |
| 705 | p32x_vdp_write8(a, d); |
| 706 | return; |
| 707 | } |
| 708 | |
| 709 | // TODO: verify |
| 710 | if ((a & 0xfe00) == 0x5200) { // a15200 |
| 711 | elprintf(EL_32X|EL_ANOMALY, "m68k 32x PAL w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
| 712 | ((u8 *)Pico32xMem->pal)[(a & 0x1ff) ^ 1] = d; |
| 713 | Pico32x.dirty_pal = 1; |
| 714 | return; |
| 715 | } |
| 716 | |
| 717 | elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
| 718 | } |
| 719 | |
| 720 | static void PicoWrite16_32x_on(u32 a, u32 d) |
| 721 | { |
| 722 | if ((a & 0xfc00) == 0x5000) |
| 723 | elprintf(EL_UIO, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
| 724 | |
| 725 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| 726 | p32x_reg_write16(a, d); |
| 727 | return; |
| 728 | } |
| 729 | |
| 730 | if ((a & 0xfc00) != 0x5000) { |
| 731 | PicoWrite16_io(a, d); |
| 732 | return; |
| 733 | } |
| 734 | |
| 735 | if ((a & 0xfff0) == 0x5180) { // a15180 |
| 736 | p32x_vdp_write16(a, d); |
| 737 | return; |
| 738 | } |
| 739 | |
| 740 | if ((a & 0xfe00) == 0x5200) { // a15200 |
| 741 | Pico32xMem->pal[(a & 0x1ff) / 2] = d; |
| 742 | Pico32x.dirty_pal = 1; |
| 743 | return; |
| 744 | } |
| 745 | |
| 746 | elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
| 747 | } |
| 748 | |
| 749 | // before ADEN |
| 750 | u32 PicoRead8_32x(u32 a) |
| 751 | { |
| 752 | u32 d = 0; |
| 753 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| 754 | // regs are always readable |
| 755 | d = ((u8 *)Pico32x.regs)[(a & 0x3f) ^ 1]; |
| 756 | goto out; |
| 757 | } |
| 758 | |
| 759 | if ((a & 0xfffc) == 0x30ec) { // a130ec |
| 760 | d = str_mars[a & 3]; |
| 761 | goto out; |
| 762 | } |
| 763 | |
| 764 | elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc); |
| 765 | return d; |
| 766 | |
| 767 | out: |
| 768 | elprintf(EL_32X, "m68k 32x r8 [%06x] %02x @%06x", a, d, SekPc); |
| 769 | return d; |
| 770 | } |
| 771 | |
| 772 | u32 PicoRead16_32x(u32 a) |
| 773 | { |
| 774 | u32 d = 0; |
| 775 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| 776 | d = Pico32x.regs[(a & 0x3f) / 2]; |
| 777 | goto out; |
| 778 | } |
| 779 | |
| 780 | if ((a & 0xfffc) == 0x30ec) { // a130ec |
| 781 | d = !(a & 2) ? ('M'<<8)|'A' : ('R'<<8)|'S'; |
| 782 | goto out; |
| 783 | } |
| 784 | |
| 785 | elprintf(EL_UIO, "m68k unmapped r16 [%06x] @%06x", a, SekPc); |
| 786 | return d; |
| 787 | |
| 788 | out: |
| 789 | elprintf(EL_32X, "m68k 32x r16 [%06x] %04x @%06x", a, d, SekPc); |
| 790 | return d; |
| 791 | } |
| 792 | |
| 793 | void PicoWrite8_32x(u32 a, u32 d) |
| 794 | { |
| 795 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| 796 | u16 *r = Pico32x.regs; |
| 797 | |
| 798 | elprintf(EL_32X, "m68k 32x w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
| 799 | a &= 0x3f; |
| 800 | if (a == 1) { |
| 801 | if ((d ^ r[0]) & d & P32XS_ADEN) { |
| 802 | Pico32xStartup(); |
| 803 | r[0] &= ~P32XS_nRES; // causes reset if specified by this write |
| 804 | r[0] |= P32XS_ADEN; |
| 805 | p32x_reg_write8(a, d); // forward for reset processing |
| 806 | } |
| 807 | return; |
| 808 | } |
| 809 | |
| 810 | // allow only COMM for now |
| 811 | if ((a & 0x30) == 0x20) { |
| 812 | u8 *r8 = (u8 *)r; |
| 813 | r8[a ^ 1] = d; |
| 814 | } |
| 815 | return; |
| 816 | } |
| 817 | |
| 818 | elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
| 819 | } |
| 820 | |
| 821 | void PicoWrite16_32x(u32 a, u32 d) |
| 822 | { |
| 823 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| 824 | u16 *r = Pico32x.regs; |
| 825 | |
| 826 | elprintf(EL_UIO, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
| 827 | a &= 0x3e; |
| 828 | if (a == 0) { |
| 829 | if ((d ^ r[0]) & d & P32XS_ADEN) { |
| 830 | Pico32xStartup(); |
| 831 | r[0] &= ~P32XS_nRES; // causes reset if specified by this write |
| 832 | r[0] |= P32XS_ADEN; |
| 833 | p32x_reg_write16(a, d); // forward for reset processing |
| 834 | } |
| 835 | return; |
| 836 | } |
| 837 | |
| 838 | // allow only COMM for now |
| 839 | if ((a & 0x30) == 0x20) |
| 840 | r[a / 2] = d; |
| 841 | return; |
| 842 | } |
| 843 | |
| 844 | elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
| 845 | } |
| 846 | |
| 847 | // ----------------------------------------------------------------- |
| 848 | |
| 849 | // hint vector is writeable |
| 850 | static void PicoWrite8_hint(u32 a, u32 d) |
| 851 | { |
| 852 | if ((a & 0xfffc) == 0x0070) { |
| 853 | Pico32xMem->m68k_rom[a ^ 1] = d; |
| 854 | return; |
| 855 | } |
| 856 | |
| 857 | elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
| 858 | } |
| 859 | |
| 860 | static void PicoWrite16_hint(u32 a, u32 d) |
| 861 | { |
| 862 | if ((a & 0xfffc) == 0x0070) { |
| 863 | ((u16 *)Pico32xMem->m68k_rom)[a/2] = d; |
| 864 | return; |
| 865 | } |
| 866 | |
| 867 | elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
| 868 | } |
| 869 | |
| 870 | void Pico32xSwapDRAM(int b) |
| 871 | { |
| 872 | cpu68k_map_set(m68k_read8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); |
| 873 | cpu68k_map_set(m68k_read16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); |
| 874 | cpu68k_map_set(m68k_write8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); |
| 875 | cpu68k_map_set(m68k_write16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); |
| 876 | } |
| 877 | |
| 878 | static void bank_switch(int b) |
| 879 | { |
| 880 | unsigned int rs, bank; |
| 881 | |
| 882 | bank = b << 20; |
| 883 | if (bank >= Pico.romsize) { |
| 884 | elprintf(EL_32X|EL_ANOMALY, "missing bank @ %06x", bank); |
| 885 | return; |
| 886 | } |
| 887 | |
| 888 | // 32X ROM (unbanked, XXX: consider mirroring?) |
| 889 | rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK; |
| 890 | rs -= bank; |
| 891 | if (rs > 0x100000) |
| 892 | rs = 0x100000; |
| 893 | cpu68k_map_set(m68k_read8_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0); |
| 894 | cpu68k_map_set(m68k_read16_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0); |
| 895 | |
| 896 | elprintf(EL_32X, "bank %06x-%06x -> %06x", 0x900000, 0x900000 + rs - 1, bank); |
| 897 | } |
| 898 | |
| 899 | // ----------------------------------------------------------------- |
| 900 | // SH2 |
| 901 | // ----------------------------------------------------------------- |
| 902 | |
| 903 | u32 p32x_sh2_read8(u32 a, int id) |
| 904 | { |
| 905 | u32 d = 0; |
| 906 | |
| 907 | if (id == 0 && a < sizeof(Pico32xMem->sh2_rom_m)) |
| 908 | return Pico32xMem->sh2_rom_m[a ^ 1]; |
| 909 | if (id == 1 && a < sizeof(Pico32xMem->sh2_rom_s)) |
| 910 | return Pico32xMem->sh2_rom_s[a ^ 1]; |
| 911 | |
| 912 | if ((a & 0xdffc0000) == 0x06000000) |
| 913 | return Pico32xMem->sdram[(a & 0x3ffff) ^ 1]; |
| 914 | |
| 915 | if ((a & 0xdfc00000) == 0x02000000) |
| 916 | if ((a & 0x003fffff) < Pico.romsize) |
| 917 | return Pico.rom[(a & 0x3fffff) ^ 1]; |
| 918 | |
| 919 | if ((a & ~0xfff) == 0xc0000000) |
| 920 | return Pico32xMem->data_array[id][(a & 0xfff) ^ 1]; |
| 921 | |
| 922 | if ((a & 0xdffc0000) == 0x04000000) { |
| 923 | /* XXX: overwrite readable as normal? */ |
| 924 | u8 *dram = (u8 *)Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1]; |
| 925 | return dram[(a & 0x1ffff) ^ 1]; |
| 926 | } |
| 927 | |
| 928 | if ((a & 0xdfffff00) == 0x4000) { |
| 929 | d = p32x_sh2reg_read16(a, id); |
| 930 | goto out_16to8; |
| 931 | } |
| 932 | |
| 933 | if ((a & 0xdfffff00) == 0x4100) { |
| 934 | d = p32x_vdp_read16(a); |
| 935 | if (p32x_poll_detect(&sh2_poll[id], a, ash2_cycles_done(), 1)) |
| 936 | ash2_end_run(8); |
| 937 | goto out_16to8; |
| 938 | } |
| 939 | |
| 940 | if ((a & 0xdfffff00) == 0x4200) { |
| 941 | d = Pico32xMem->pal[(a & 0x1ff) / 2]; |
| 942 | goto out_16to8; |
| 943 | } |
| 944 | |
| 945 | if ((a & 0xfffffe00) == 0xfffffe00) |
| 946 | return sh2_peripheral_read8(a, id); |
| 947 | |
| 948 | elprintf(EL_UIO, "%csh2 unmapped r8 [%08x] %02x @%06x", |
| 949 | id ? 's' : 'm', a, d, sh2_pc(id)); |
| 950 | return d; |
| 951 | |
| 952 | out_16to8: |
| 953 | if (a & 1) |
| 954 | d &= 0xff; |
| 955 | else |
| 956 | d >>= 8; |
| 957 | |
| 958 | elprintf(EL_32X, "%csh2 r8 [%08x] %02x @%06x", |
| 959 | id ? 's' : 'm', a, d, sh2_pc(id)); |
| 960 | return d; |
| 961 | } |
| 962 | |
| 963 | u32 p32x_sh2_read16(u32 a, int id) |
| 964 | { |
| 965 | u32 d = 0; |
| 966 | |
| 967 | if (id == 0 && a < sizeof(Pico32xMem->sh2_rom_m)) |
| 968 | return *(u16 *)(Pico32xMem->sh2_rom_m + a); |
| 969 | if (id == 1 && a < sizeof(Pico32xMem->sh2_rom_s)) |
| 970 | return *(u16 *)(Pico32xMem->sh2_rom_s + a); |
| 971 | |
| 972 | if ((a & 0xdffc0000) == 0x06000000) |
| 973 | return ((u16 *)Pico32xMem->sdram)[(a & 0x3ffff) / 2]; |
| 974 | |
| 975 | if ((a & 0xdfc00000) == 0x02000000) |
| 976 | if ((a & 0x003fffff) < Pico.romsize) |
| 977 | return ((u16 *)Pico.rom)[(a & 0x3fffff) / 2]; |
| 978 | |
| 979 | if ((a & ~0xfff) == 0xc0000000) |
| 980 | return ((u16 *)Pico32xMem->data_array[id])[(a & 0xfff) / 2]; |
| 981 | |
| 982 | if ((a & 0xdffe0000) == 0x04000000) |
| 983 | return Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1][(a & 0x1ffff) / 2]; |
| 984 | |
| 985 | if ((a & 0xdfffff00) == 0x4000) { |
| 986 | d = p32x_sh2reg_read16(a, id); |
| 987 | if (!(EL_LOGMASK & EL_PWM) && (a & 0x30) == 0x30) // hide PWM |
| 988 | return d; |
| 989 | goto out; |
| 990 | } |
| 991 | |
| 992 | if ((a & 0xdfffff00) == 0x4100) { |
| 993 | d = p32x_vdp_read16(a); |
| 994 | if (p32x_poll_detect(&sh2_poll[id], a, ash2_cycles_done(), 1)) |
| 995 | ash2_end_run(8); |
| 996 | goto out; |
| 997 | } |
| 998 | |
| 999 | if ((a & 0xdfffff00) == 0x4200) { |
| 1000 | d = Pico32xMem->pal[(a & 0x1ff) / 2]; |
| 1001 | goto out; |
| 1002 | } |
| 1003 | |
| 1004 | if ((a & 0xfffffe00) == 0xfffffe00) |
| 1005 | return sh2_peripheral_read16(a, id); |
| 1006 | |
| 1007 | elprintf(EL_UIO, "%csh2 unmapped r16 [%08x] %04x @%06x", |
| 1008 | id ? 's' : 'm', a, d, sh2_pc(id)); |
| 1009 | return d; |
| 1010 | |
| 1011 | out: |
| 1012 | elprintf(EL_32X, "%csh2 r16 [%08x] %04x @%06x", |
| 1013 | id ? 's' : 'm', a, d, sh2_pc(id)); |
| 1014 | return d; |
| 1015 | } |
| 1016 | |
| 1017 | u32 p32x_sh2_read32(u32 a, int id) |
| 1018 | { |
| 1019 | if ((a & 0xfffffe00) == 0xfffffe00) |
| 1020 | return sh2_peripheral_read32(a, id); |
| 1021 | |
| 1022 | // elprintf(EL_UIO, "sh2 r32 [%08x] %08x @%06x", a, d, ash2_pc()); |
| 1023 | return (p32x_sh2_read16(a, id) << 16) | p32x_sh2_read16(a + 2, id); |
| 1024 | } |
| 1025 | |
| 1026 | void p32x_sh2_write8(u32 a, u32 d, int id) |
| 1027 | { |
| 1028 | if ((a & 0xdffffc00) == 0x4000) |
| 1029 | elprintf(EL_32X, "%csh2 w8 [%08x] %02x @%06x", |
| 1030 | id ? 's' : 'm', a, d & 0xff, sh2_pc(id)); |
| 1031 | |
| 1032 | if ((a & 0xdffc0000) == 0x06000000) { |
| 1033 | Pico32xMem->sdram[(a & 0x3ffff) ^ 1] = d; |
| 1034 | return; |
| 1035 | } |
| 1036 | |
| 1037 | if ((a & 0xdffc0000) == 0x04000000) { |
| 1038 | u8 *dram; |
| 1039 | if (!(a & 0x20000) || d) { |
| 1040 | dram = (u8 *)Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1]; |
| 1041 | dram[(a & 0x1ffff) ^ 1] = d; |
| 1042 | } |
| 1043 | return; |
| 1044 | } |
| 1045 | |
| 1046 | if ((a & ~0xfff) == 0xc0000000) { |
| 1047 | Pico32xMem->data_array[id][(a & 0xfff) ^ 1] = d; |
| 1048 | return; |
| 1049 | } |
| 1050 | |
| 1051 | if ((a & 0xdfffff00) == 0x4100) { |
| 1052 | p32x_vdp_write8(a, d); |
| 1053 | return; |
| 1054 | } |
| 1055 | |
| 1056 | if ((a & 0xdfffff00) == 0x4000) { |
| 1057 | p32x_sh2reg_write8(a, d, id); |
| 1058 | return; |
| 1059 | } |
| 1060 | |
| 1061 | if ((a & 0xfffffe00) == 0xfffffe00) { |
| 1062 | sh2_peripheral_write8(a, d, id); |
| 1063 | return; |
| 1064 | } |
| 1065 | |
| 1066 | elprintf(EL_UIO, "%csh2 unmapped w8 [%08x] %02x @%06x", |
| 1067 | id ? 's' : 'm', a, d & 0xff, sh2_pc(id)); |
| 1068 | } |
| 1069 | |
| 1070 | void p32x_sh2_write16(u32 a, u32 d, int id) |
| 1071 | { |
| 1072 | if ((a & 0xdffffc00) == 0x4000 && ((EL_LOGMASK & EL_PWM) || (a & 0x30) != 0x30)) // hide PWM |
| 1073 | elprintf(EL_32X, "%csh2 w16 [%08x] %04x @%06x", |
| 1074 | id ? 's' : 'm', a, d & 0xffff, sh2_pc(id)); |
| 1075 | |
| 1076 | // ignore "Associative purge space" |
| 1077 | if ((a & 0xf8000000) == 0x40000000) |
| 1078 | return; |
| 1079 | |
| 1080 | if ((a & 0xdffc0000) == 0x06000000) { |
| 1081 | ((u16 *)Pico32xMem->sdram)[(a & 0x3ffff) / 2] = d; |
| 1082 | return; |
| 1083 | } |
| 1084 | |
| 1085 | if ((a & ~0xfff) == 0xc0000000) { |
| 1086 | ((u16 *)Pico32xMem->data_array[id])[(a & 0xfff) / 2] = d; |
| 1087 | return; |
| 1088 | } |
| 1089 | |
| 1090 | if ((a & 0xdffc0000) == 0x04000000) { |
| 1091 | u16 *pd = &Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1][(a & 0x1ffff) / 2]; |
| 1092 | if (!(a & 0x20000)) { |
| 1093 | *pd = d; |
| 1094 | return; |
| 1095 | } |
| 1096 | // overwrite |
| 1097 | if (!(d & 0xff00)) d |= *pd & 0xff00; |
| 1098 | if (!(d & 0x00ff)) d |= *pd & 0x00ff; |
| 1099 | *pd = d; |
| 1100 | return; |
| 1101 | } |
| 1102 | |
| 1103 | if ((a & 0xdfffff00) == 0x4100) { |
| 1104 | sh2_poll[id].cnt = 0; // for poll before VDP accesses |
| 1105 | p32x_vdp_write16(a, d); |
| 1106 | return; |
| 1107 | } |
| 1108 | |
| 1109 | if ((a & 0xdffffe00) == 0x4200) { |
| 1110 | Pico32xMem->pal[(a & 0x1ff) / 2] = d; |
| 1111 | Pico32x.dirty_pal = 1; |
| 1112 | return; |
| 1113 | } |
| 1114 | |
| 1115 | if ((a & 0xdfffff00) == 0x4000) { |
| 1116 | p32x_sh2reg_write16(a, d, id); |
| 1117 | return; |
| 1118 | } |
| 1119 | |
| 1120 | if ((a & 0xfffffe00) == 0xfffffe00) { |
| 1121 | sh2_peripheral_write16(a, d, id); |
| 1122 | return; |
| 1123 | } |
| 1124 | |
| 1125 | elprintf(EL_UIO, "%csh2 unmapped w16 [%08x] %04x @%06x", |
| 1126 | id ? 's' : 'm', a, d & 0xffff, sh2_pc(id)); |
| 1127 | } |
| 1128 | |
| 1129 | void p32x_sh2_write32(u32 a, u32 d, int id) |
| 1130 | { |
| 1131 | if ((a & 0xfffffe00) == 0xfffffe00) { |
| 1132 | sh2_peripheral_write32(a, d, id); |
| 1133 | return; |
| 1134 | } |
| 1135 | |
| 1136 | p32x_sh2_write16(a, d >> 16, id); |
| 1137 | p32x_sh2_write16(a + 2, d, id); |
| 1138 | } |
| 1139 | |
| 1140 | static const u16 msh2_code[] = { |
| 1141 | // trap instructions |
| 1142 | 0xaffe, // bra <self> |
| 1143 | 0x0009, // nop |
| 1144 | // have to wait a bit until m68k initial program finishes clearing stuff |
| 1145 | // to avoid races with game SH2 code, like in Tempo |
| 1146 | 0xd004, // mov.l @(_m_ok,pc), r0 |
| 1147 | 0xd105, // mov.l @(_cnt,pc), r1 |
| 1148 | 0xd205, // mov.l @(_start,pc), r2 |
| 1149 | 0x71ff, // add #-1, r1 |
| 1150 | 0x4115, // cmp/pl r1 |
| 1151 | 0x89fc, // bt -2 |
| 1152 | 0xc208, // mov.l r0, @(h'20,gbr) |
| 1153 | 0x6822, // mov.l @r2, r8 |
| 1154 | 0x482b, // jmp @r8 |
| 1155 | 0x0009, // nop |
| 1156 | ('M'<<8)|'_', ('O'<<8)|'K', |
| 1157 | 0x0001, 0x0000, |
| 1158 | 0x2200, 0x03e0 // master start pointer in ROM |
| 1159 | }; |
| 1160 | |
| 1161 | static const u16 ssh2_code[] = { |
| 1162 | 0xaffe, // bra <self> |
| 1163 | 0x0009, // nop |
| 1164 | // code to wait for master, in case authentic master BIOS is used |
| 1165 | 0xd104, // mov.l @(_m_ok,pc), r1 |
| 1166 | 0xd206, // mov.l @(_start,pc), r2 |
| 1167 | 0xc608, // mov.l @(h'20,gbr), r0 |
| 1168 | 0x3100, // cmp/eq r0, r1 |
| 1169 | 0x8bfc, // bf #-2 |
| 1170 | 0xd003, // mov.l @(_s_ok,pc), r0 |
| 1171 | 0xc209, // mov.l r0, @(h'24,gbr) |
| 1172 | 0x6822, // mov.l @r2, r8 |
| 1173 | 0x482b, // jmp @r8 |
| 1174 | 0x0009, // nop |
| 1175 | ('M'<<8)|'_', ('O'<<8)|'K', |
| 1176 | ('S'<<8)|'_', ('O'<<8)|'K', |
| 1177 | 0x2200, 0x03e4 // slave start pointer in ROM |
| 1178 | }; |
| 1179 | |
| 1180 | #define HWSWAP(x) (((x) << 16) | ((x) >> 16)) |
| 1181 | static void get_bios(void) |
| 1182 | { |
| 1183 | u16 *ps; |
| 1184 | u32 *pl; |
| 1185 | int i; |
| 1186 | |
| 1187 | // M68K ROM |
| 1188 | if (p32x_bios_g != NULL) { |
| 1189 | elprintf(EL_STATUS|EL_32X, "32x: using supplied 68k BIOS"); |
| 1190 | Byteswap(Pico32xMem->m68k_rom, p32x_bios_g, 0x100); |
| 1191 | } |
| 1192 | else { |
| 1193 | // generate 68k ROM |
| 1194 | ps = (u16 *)Pico32xMem->m68k_rom; |
| 1195 | pl = (u32 *)ps; |
| 1196 | for (i = 1; i < 0xc0/4; i++) |
| 1197 | pl[i] = HWSWAP(0x880200 + (i - 1) * 6); |
| 1198 | |
| 1199 | // fill with nops |
| 1200 | for (i = 0xc0/2; i < 0x100/2; i++) |
| 1201 | ps[i] = 0x4e71; |
| 1202 | |
| 1203 | #if 0 |
| 1204 | ps[0xc0/2] = 0x46fc; |
| 1205 | ps[0xc2/2] = 0x2700; // move #0x2700,sr |
| 1206 | ps[0xfe/2] = 0x60fe; // jump to self |
| 1207 | #else |
| 1208 | ps[0xfe/2] = 0x4e75; // rts |
| 1209 | #endif |
| 1210 | } |
| 1211 | // fill remaining m68k_rom page with game ROM |
| 1212 | memcpy(Pico32xMem->m68k_rom + 0x100, Pico.rom + 0x100, sizeof(Pico32xMem->m68k_rom) - 0x100); |
| 1213 | |
| 1214 | // MSH2 |
| 1215 | if (p32x_bios_m != NULL) { |
| 1216 | elprintf(EL_STATUS|EL_32X, "32x: using supplied master SH2 BIOS"); |
| 1217 | Byteswap(Pico32xMem->sh2_rom_m, p32x_bios_m, sizeof(Pico32xMem->sh2_rom_m)); |
| 1218 | } |
| 1219 | else { |
| 1220 | pl = (u32 *)Pico32xMem->sh2_rom_m; |
| 1221 | |
| 1222 | // fill exception vector table to our trap address |
| 1223 | for (i = 0; i < 128; i++) |
| 1224 | pl[i] = HWSWAP(0x200); |
| 1225 | |
| 1226 | // startup code |
| 1227 | memcpy(Pico32xMem->sh2_rom_m + 0x200, msh2_code, sizeof(msh2_code)); |
| 1228 | |
| 1229 | // reset SP |
| 1230 | pl[1] = pl[3] = HWSWAP(0x6040000); |
| 1231 | // start |
| 1232 | pl[0] = pl[2] = HWSWAP(0x204); |
| 1233 | } |
| 1234 | |
| 1235 | // SSH2 |
| 1236 | if (p32x_bios_s != NULL) { |
| 1237 | elprintf(EL_STATUS|EL_32X, "32x: using supplied slave SH2 BIOS"); |
| 1238 | Byteswap(Pico32xMem->sh2_rom_s, p32x_bios_s, sizeof(Pico32xMem->sh2_rom_s)); |
| 1239 | } |
| 1240 | else { |
| 1241 | pl = (u32 *)Pico32xMem->sh2_rom_s; |
| 1242 | |
| 1243 | // fill exception vector table to our trap address |
| 1244 | for (i = 0; i < 128; i++) |
| 1245 | pl[i] = HWSWAP(0x200); |
| 1246 | |
| 1247 | // startup code |
| 1248 | memcpy(Pico32xMem->sh2_rom_s + 0x200, ssh2_code, sizeof(ssh2_code)); |
| 1249 | |
| 1250 | // reset SP |
| 1251 | pl[1] = pl[3] = HWSWAP(0x603f800); |
| 1252 | // start |
| 1253 | pl[0] = pl[2] = HWSWAP(0x204); |
| 1254 | } |
| 1255 | } |
| 1256 | |
| 1257 | void PicoMemSetup32x(void) |
| 1258 | { |
| 1259 | unsigned int rs; |
| 1260 | |
| 1261 | Pico32xMem = calloc(1, sizeof(*Pico32xMem)); |
| 1262 | if (Pico32xMem == NULL) { |
| 1263 | elprintf(EL_STATUS, "OOM"); |
| 1264 | return; |
| 1265 | } |
| 1266 | |
| 1267 | dmac0 = (void *)&Pico32xMem->sh2_peri_regs[0][0x180 / 4]; |
| 1268 | |
| 1269 | get_bios(); |
| 1270 | |
| 1271 | // cartridge area becomes unmapped |
| 1272 | // XXX: we take the easy way and don't unmap ROM, |
| 1273 | // so that we can avoid handling the RV bit. |
| 1274 | // m68k_map_unmap(0x000000, 0x3fffff); |
| 1275 | |
| 1276 | // MD ROM area |
| 1277 | rs = sizeof(Pico32xMem->m68k_rom); |
| 1278 | cpu68k_map_set(m68k_read8_map, 0x000000, rs - 1, Pico32xMem->m68k_rom, 0); |
| 1279 | cpu68k_map_set(m68k_read16_map, 0x000000, rs - 1, Pico32xMem->m68k_rom, 0); |
| 1280 | cpu68k_map_set(m68k_write8_map, 0x000000, rs - 1, PicoWrite8_hint, 1); // TODO verify |
| 1281 | cpu68k_map_set(m68k_write16_map, 0x000000, rs - 1, PicoWrite16_hint, 1); |
| 1282 | |
| 1283 | // DRAM area |
| 1284 | Pico32xSwapDRAM(1); |
| 1285 | |
| 1286 | // 32X ROM (unbanked, XXX: consider mirroring?) |
| 1287 | rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK; |
| 1288 | if (rs > 0x80000) |
| 1289 | rs = 0x80000; |
| 1290 | cpu68k_map_set(m68k_read8_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0); |
| 1291 | cpu68k_map_set(m68k_read16_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0); |
| 1292 | |
| 1293 | // 32X ROM (banked) |
| 1294 | bank_switch(0); |
| 1295 | |
| 1296 | // SYS regs |
| 1297 | cpu68k_map_set(m68k_read8_map, 0xa10000, 0xa1ffff, PicoRead8_32x_on, 1); |
| 1298 | cpu68k_map_set(m68k_read16_map, 0xa10000, 0xa1ffff, PicoRead16_32x_on, 1); |
| 1299 | cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, PicoWrite8_32x_on, 1); |
| 1300 | cpu68k_map_set(m68k_write16_map, 0xa10000, 0xa1ffff, PicoWrite16_32x_on, 1); |
| 1301 | |
| 1302 | // setup poll detector |
| 1303 | m68k_poll.flag = P32XF_68KPOLL; |
| 1304 | m68k_poll.cyc_max = 64; |
| 1305 | sh2_poll[0].flag = P32XF_MSH2POLL; |
| 1306 | sh2_poll[0].cyc_max = 21; |
| 1307 | sh2_poll[1].flag = P32XF_SSH2POLL; |
| 1308 | sh2_poll[1].cyc_max = 16; |
| 1309 | } |
| 1310 | |