| 1 | /* |
| 2 | * PicoDrive |
| 3 | * (C) notaz, 2009,2010 |
| 4 | * |
| 5 | * This work is licensed under the terms of MAME license. |
| 6 | * See COPYING file in the top-level directory. |
| 7 | * |
| 8 | * SH2 addr lines: |
| 9 | * iii. .cc. ..xx * // Internal, Cs, x |
| 10 | * |
| 11 | * Register map: |
| 12 | * a15100 F....... R.....EA F.....AC N...VHMP 4000 // Fm Ren nrEs Aden Cart heN V H cMd Pwm |
| 13 | * a15102 ........ ......SM ? 4002 // intS intM |
| 14 | * a15104 ........ ......10 ........ hhhhhhhh 4004 // bk1 bk0 Hint |
| 15 | * a15106 F....... .....SDR UE...... .....SDR 4006 // Full 68S Dma Rv fUll[fb] Empt[fb] |
| 16 | * a15108 (32bit DREQ src) 4008 |
| 17 | * a1510c (32bit DREQ dst) 400c |
| 18 | * a15110 llllllll llllll00 4010 // DREQ Len |
| 19 | * a15112 (16bit FIFO reg) 4012 |
| 20 | * a15114 ? (16bit VRES clr) 4014 |
| 21 | * a15116 ? (16bit Vint clr) 4016 |
| 22 | * a15118 ? (16bit Hint clr) 4018 |
| 23 | * a1511a ........ .......C (16bit CMD clr) 401a // Cm |
| 24 | * a1511c ? (16bit PWM clr) 401c |
| 25 | * a1511e ? ? 401e |
| 26 | * a15120 (16 bytes comm) 2020 |
| 27 | * a15130 (PWM) 2030 |
| 28 | */ |
| 29 | #include "../pico_int.h" |
| 30 | #include "../memory.h" |
| 31 | #ifdef DRC_SH2 |
| 32 | #include "../../cpu/sh2/compiler.h" |
| 33 | #endif |
| 34 | |
| 35 | #if 0 |
| 36 | #undef ash2_end_run |
| 37 | #undef SekEndRun |
| 38 | #define ash2_end_run(x) |
| 39 | #define SekEndRun(x) |
| 40 | #endif |
| 41 | |
| 42 | static const char str_mars[] = "MARS"; |
| 43 | |
| 44 | void *p32x_bios_g, *p32x_bios_m, *p32x_bios_s; |
| 45 | struct Pico32xMem *Pico32xMem; |
| 46 | |
| 47 | static void bank_switch(int b); |
| 48 | |
| 49 | // poll detection |
| 50 | #define POLL_THRESHOLD 6 |
| 51 | |
| 52 | struct poll_det { |
| 53 | u32 addr, cycles, cyc_max; |
| 54 | int cnt, flag; |
| 55 | }; |
| 56 | static struct poll_det m68k_poll, sh2_poll[2]; |
| 57 | |
| 58 | static int p32x_poll_detect(struct poll_det *pd, u32 a, u32 cycles, int is_vdp) |
| 59 | { |
| 60 | int ret = 0, flag = pd->flag; |
| 61 | |
| 62 | if (is_vdp) |
| 63 | flag <<= 3; |
| 64 | |
| 65 | if (a - 2 <= pd->addr && pd->addr <= a + 2 && cycles - pd->cycles <= pd->cyc_max) { |
| 66 | pd->cnt++; |
| 67 | if (pd->cnt > POLL_THRESHOLD) { |
| 68 | if (!(Pico32x.emu_flags & flag)) { |
| 69 | elprintf(EL_32X, "%s poll addr %08x, cyc %u", |
| 70 | flag & (P32XF_68KPOLL|P32XF_68KVPOLL) ? "m68k" : |
| 71 | (flag & (P32XF_MSH2POLL|P32XF_MSH2VPOLL) ? "msh2" : "ssh2"), a, cycles - pd->cycles); |
| 72 | ret = 1; |
| 73 | } |
| 74 | Pico32x.emu_flags |= flag; |
| 75 | } |
| 76 | } |
| 77 | else { |
| 78 | pd->cnt = 0; |
| 79 | pd->addr = a; |
| 80 | } |
| 81 | pd->cycles = cycles; |
| 82 | |
| 83 | return ret; |
| 84 | } |
| 85 | |
| 86 | static int p32x_poll_undetect(struct poll_det *pd, int is_vdp) |
| 87 | { |
| 88 | int ret = 0, flag = pd->flag; |
| 89 | if (is_vdp) |
| 90 | flag <<= 3; // VDP only |
| 91 | else |
| 92 | flag |= flag << 3; // both |
| 93 | if (Pico32x.emu_flags & flag) { |
| 94 | elprintf(EL_32X, "poll %02x -> %02x", Pico32x.emu_flags, Pico32x.emu_flags & ~flag); |
| 95 | ret = 1; |
| 96 | } |
| 97 | Pico32x.emu_flags &= ~flag; |
| 98 | pd->addr = pd->cnt = 0; |
| 99 | return ret; |
| 100 | } |
| 101 | |
| 102 | void p32x_poll_event(int cpu_mask, int is_vdp) |
| 103 | { |
| 104 | if (cpu_mask & 1) |
| 105 | p32x_poll_undetect(&sh2_poll[0], is_vdp); |
| 106 | if (cpu_mask & 2) |
| 107 | p32x_poll_undetect(&sh2_poll[1], is_vdp); |
| 108 | } |
| 109 | |
| 110 | // SH2 faking |
| 111 | //#define FAKE_SH2 |
| 112 | int p32x_csum_faked; |
| 113 | #ifdef FAKE_SH2 |
| 114 | static const u16 comm_fakevals[] = { |
| 115 | 0x4d5f, 0x4f4b, // M_OK |
| 116 | 0x535f, 0x4f4b, // S_OK |
| 117 | 0x4D41, 0x5346, // MASF - Brutal Unleashed |
| 118 | 0x5331, 0x4d31, // Darxide |
| 119 | 0x5332, 0x4d32, |
| 120 | 0x5333, 0x4d33, |
| 121 | 0x0000, 0x0000, // eq for doom |
| 122 | 0x0002, // Mortal Kombat |
| 123 | // 0, // pad |
| 124 | }; |
| 125 | |
| 126 | static u32 sh2_comm_faker(u32 a) |
| 127 | { |
| 128 | static int f = 0; |
| 129 | if (a == 0x28 && !p32x_csum_faked) { |
| 130 | p32x_csum_faked = 1; |
| 131 | return *(unsigned short *)(Pico.rom + 0x18e); |
| 132 | } |
| 133 | if (f >= sizeof(comm_fakevals) / sizeof(comm_fakevals[0])) |
| 134 | f = 0; |
| 135 | return comm_fakevals[f++]; |
| 136 | } |
| 137 | #endif |
| 138 | |
| 139 | // DMAC handling |
| 140 | static struct { |
| 141 | unsigned int sar0, dar0, tcr0; // src addr, dst addr, transfer count |
| 142 | unsigned int chcr0; // chan ctl |
| 143 | unsigned int sar1, dar1, tcr1; // same for chan 1 |
| 144 | unsigned int chcr1; |
| 145 | int pad[4]; |
| 146 | unsigned int dmaor; |
| 147 | } * dmac0; |
| 148 | |
| 149 | static void dma_68k2sh2_do(void) |
| 150 | { |
| 151 | unsigned short *dreqlen = &Pico32x.regs[0x10 / 2]; |
| 152 | int i; |
| 153 | |
| 154 | if (dmac0->tcr0 != *dreqlen) |
| 155 | elprintf(EL_32X|EL_ANOMALY, "tcr0 and dreq len differ: %d != %d", dmac0->tcr0, *dreqlen); |
| 156 | |
| 157 | // HACK: assume bus is busy and SH2 is halted |
| 158 | // XXX: use different mechanism for this, not poll det |
| 159 | Pico32x.emu_flags |= P32XF_MSH2POLL; // id ? P32XF_SSH2POLL : P32XF_MSH2POLL; |
| 160 | |
| 161 | for (i = 0; i < Pico32x.dmac_ptr && dmac0->tcr0 > 0; i++) { |
| 162 | elprintf(EL_32X, "dmaw [%08x] %04x, left %d", dmac0->dar0, Pico32x.dmac_fifo[i], *dreqlen); |
| 163 | p32x_sh2_write16(dmac0->dar0, Pico32x.dmac_fifo[i], &msh2); |
| 164 | dmac0->dar0 += 2; |
| 165 | dmac0->tcr0--; |
| 166 | (*dreqlen)--; |
| 167 | } |
| 168 | |
| 169 | Pico32x.dmac_ptr = 0; // HACK |
| 170 | Pico32x.regs[6 / 2] &= ~P32XS_FULL; |
| 171 | if (*dreqlen == 0) |
| 172 | Pico32x.regs[6 / 2] &= ~P32XS_68S; // transfer complete |
| 173 | if (dmac0->tcr0 == 0) { |
| 174 | dmac0->chcr0 |= 2; // DMA has ended normally |
| 175 | p32x_poll_undetect(&sh2_poll[0], 0); |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | // ------------------------------------------------------------------ |
| 180 | // 68k regs |
| 181 | |
| 182 | static u32 p32x_reg_read16(u32 a) |
| 183 | { |
| 184 | a &= 0x3e; |
| 185 | |
| 186 | #if 0 |
| 187 | if ((a & 0x30) == 0x20) |
| 188 | return sh2_comm_faker(a); |
| 189 | #else |
| 190 | if ((a & 0x30) == 0x20) { |
| 191 | static u32 dr2 = 0; |
| 192 | unsigned int cycles = SekCyclesDoneT(); |
| 193 | int comreg = 1 << (a & 0x0f) / 2; |
| 194 | |
| 195 | // evil X-Men proto polls in a dbra loop and expects it to expire.. |
| 196 | if (SekDar(2) != dr2) |
| 197 | m68k_poll.cnt = 0; |
| 198 | dr2 = SekDar(2); |
| 199 | |
| 200 | if (cycles - msh2.m68krcycles_done > 500) |
| 201 | p32x_sync_sh2s(cycles); |
| 202 | if (Pico32x.comm_dirty_sh2 & comreg) |
| 203 | Pico32x.comm_dirty_sh2 &= ~comreg; |
| 204 | else if (p32x_poll_detect(&m68k_poll, a, cycles, 0)) { |
| 205 | SekSetStop(1); |
| 206 | SekEndTimeslice(16); |
| 207 | } |
| 208 | dr2 = SekDar(2); |
| 209 | goto out; |
| 210 | } |
| 211 | #endif |
| 212 | |
| 213 | if (a == 2) { // INTM, INTS |
| 214 | unsigned int cycles = SekCyclesDoneT(); |
| 215 | if (cycles - msh2.m68krcycles_done > 64) |
| 216 | p32x_sync_sh2s(cycles); |
| 217 | return ((Pico32x.sh2irqi[0] & P32XI_CMD) >> 4) | ((Pico32x.sh2irqi[1] & P32XI_CMD) >> 3); |
| 218 | } |
| 219 | |
| 220 | if ((a & 0x30) == 0x30) |
| 221 | return p32x_pwm_read16(a); |
| 222 | |
| 223 | out: |
| 224 | return Pico32x.regs[a / 2]; |
| 225 | } |
| 226 | |
| 227 | static void p32x_reg_write8(u32 a, u32 d) |
| 228 | { |
| 229 | u16 *r = Pico32x.regs; |
| 230 | a &= 0x3f; |
| 231 | |
| 232 | // for things like bset on comm port |
| 233 | m68k_poll.cnt = 0; |
| 234 | |
| 235 | switch (a) { |
| 236 | case 0: // adapter ctl |
| 237 | r[0] = (r[0] & ~P32XS_FM) | ((d << 8) & P32XS_FM); |
| 238 | return; |
| 239 | case 1: // adapter ctl, RES bit writeable |
| 240 | if ((d ^ r[0]) & d & P32XS_nRES) |
| 241 | p32x_reset_sh2s(); |
| 242 | r[0] = (r[0] & ~P32XS_nRES) | (d & P32XS_nRES); |
| 243 | return; |
| 244 | case 3: // irq ctl |
| 245 | if ((d & 1) && !(Pico32x.sh2irqi[0] & P32XI_CMD)) { |
| 246 | p32x_sync_sh2s(SekCyclesDoneT()); |
| 247 | Pico32x.sh2irqi[0] |= P32XI_CMD; |
| 248 | p32x_update_irls(0); |
| 249 | } |
| 250 | if ((d & 2) && !(Pico32x.sh2irqi[1] & P32XI_CMD)) { |
| 251 | p32x_sync_sh2s(SekCyclesDoneT()); |
| 252 | Pico32x.sh2irqi[1] |= P32XI_CMD; |
| 253 | p32x_update_irls(0); |
| 254 | } |
| 255 | return; |
| 256 | case 5: // bank |
| 257 | d &= 7; |
| 258 | if (r[4 / 2] != d) { |
| 259 | r[4 / 2] = d; |
| 260 | bank_switch(d); |
| 261 | } |
| 262 | return; |
| 263 | case 7: // DREQ ctl |
| 264 | r[6 / 2] = (r[6 / 2] & P32XS_FULL) | (d & (P32XS_68S|P32XS_DMA|P32XS_RV)); |
| 265 | return; |
| 266 | case 0x1b: // TV |
| 267 | r[0x1a / 2] = d; |
| 268 | return; |
| 269 | } |
| 270 | |
| 271 | if ((a & 0x30) == 0x20) { |
| 272 | u8 *r8 = (u8 *)r; |
| 273 | int cycles = SekCyclesDoneT(); |
| 274 | int comreg; |
| 275 | |
| 276 | if (r8[a ^ 1] == d) |
| 277 | return; |
| 278 | |
| 279 | comreg = 1 << (a & 0x0f) / 2; |
| 280 | if (Pico32x.comm_dirty_68k & comreg) |
| 281 | p32x_sync_sh2s(cycles); |
| 282 | |
| 283 | r8[a ^ 1] = d; |
| 284 | p32x_poll_undetect(&sh2_poll[0], 0); |
| 285 | p32x_poll_undetect(&sh2_poll[1], 0); |
| 286 | Pico32x.comm_dirty_68k |= comreg; |
| 287 | |
| 288 | if (cycles - (int)msh2.m68krcycles_done > 120) |
| 289 | p32x_sync_sh2s(cycles); |
| 290 | return; |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | static void p32x_reg_write16(u32 a, u32 d) |
| 295 | { |
| 296 | u16 *r = Pico32x.regs; |
| 297 | a &= 0x3e; |
| 298 | |
| 299 | // for things like bset on comm port |
| 300 | m68k_poll.cnt = 0; |
| 301 | |
| 302 | switch (a) { |
| 303 | case 0x00: // adapter ctl |
| 304 | if ((d ^ r[0]) & d & P32XS_nRES) |
| 305 | p32x_reset_sh2s(); |
| 306 | r[0] = (r[0] & ~(P32XS_FM|P32XS_nRES)) | (d & (P32XS_FM|P32XS_nRES)); |
| 307 | return; |
| 308 | case 0x10: // DREQ len |
| 309 | r[a / 2] = d & ~3; |
| 310 | return; |
| 311 | case 0x12: // FIFO reg |
| 312 | if (!(r[6 / 2] & P32XS_68S)) { |
| 313 | elprintf(EL_32X|EL_ANOMALY, "DREQ FIFO w16 without 68S?"); |
| 314 | return; |
| 315 | } |
| 316 | if (Pico32x.dmac_ptr < DMAC_FIFO_LEN) { |
| 317 | Pico32x.dmac_fifo[Pico32x.dmac_ptr++] = d; |
| 318 | if ((Pico32x.dmac_ptr & 3) == 0 && (dmac0->chcr0 & 3) == 1 && (dmac0->dmaor & 1)) |
| 319 | dma_68k2sh2_do(); |
| 320 | if (Pico32x.dmac_ptr == DMAC_FIFO_LEN) |
| 321 | r[6 / 2] |= P32XS_FULL; |
| 322 | } |
| 323 | break; |
| 324 | } |
| 325 | |
| 326 | // DREQ src, dst |
| 327 | if ((a & 0x38) == 0x08) { |
| 328 | r[a / 2] = d; |
| 329 | return; |
| 330 | } |
| 331 | // comm port |
| 332 | else if ((a & 0x30) == 0x20) { |
| 333 | int cycles = SekCyclesDoneT(); |
| 334 | int comreg; |
| 335 | |
| 336 | if (r[a / 2] == d) |
| 337 | return; |
| 338 | |
| 339 | comreg = 1 << (a & 0x0f) / 2; |
| 340 | if (Pico32x.comm_dirty_68k & comreg) |
| 341 | p32x_sync_sh2s(cycles); |
| 342 | |
| 343 | r[a / 2] = d; |
| 344 | p32x_poll_undetect(&sh2_poll[0], 0); |
| 345 | p32x_poll_undetect(&sh2_poll[1], 0); |
| 346 | Pico32x.comm_dirty_68k |= comreg; |
| 347 | |
| 348 | if (cycles - (int)msh2.m68krcycles_done > 120) |
| 349 | p32x_sync_sh2s(cycles); |
| 350 | return; |
| 351 | } |
| 352 | // PWM |
| 353 | else if ((a & 0x30) == 0x30) { |
| 354 | p32x_pwm_write16(a, d); |
| 355 | return; |
| 356 | } |
| 357 | |
| 358 | p32x_reg_write8(a + 1, d); |
| 359 | } |
| 360 | |
| 361 | // ------------------------------------------------------------------ |
| 362 | // VDP regs |
| 363 | static u32 p32x_vdp_read16(u32 a) |
| 364 | { |
| 365 | a &= 0x0e; |
| 366 | |
| 367 | return Pico32x.vdp_regs[a / 2]; |
| 368 | } |
| 369 | |
| 370 | static void p32x_vdp_write8(u32 a, u32 d) |
| 371 | { |
| 372 | u16 *r = Pico32x.vdp_regs; |
| 373 | a &= 0x0f; |
| 374 | |
| 375 | // for FEN checks between writes |
| 376 | sh2_poll[0].cnt = 0; |
| 377 | |
| 378 | // TODO: verify what's writeable |
| 379 | switch (a) { |
| 380 | case 0x01: |
| 381 | // priority inversion is handled in palette |
| 382 | if ((r[0] ^ d) & P32XV_PRI) |
| 383 | Pico32x.dirty_pal = 1; |
| 384 | r[0] = (r[0] & P32XV_nPAL) | (d & 0xff); |
| 385 | break; |
| 386 | case 0x03: // shift (for pp mode) |
| 387 | r[2 / 2] = d & 1; |
| 388 | break; |
| 389 | case 0x05: // fill len |
| 390 | r[4 / 2] = d & 0xff; |
| 391 | break; |
| 392 | case 0x0b: |
| 393 | d &= 1; |
| 394 | Pico32x.pending_fb = d; |
| 395 | // if we are blanking and FS bit is changing |
| 396 | if (((r[0x0a/2] & P32XV_VBLK) || (r[0] & P32XV_Mx) == 0) && ((r[0x0a/2] ^ d) & P32XV_FS)) { |
| 397 | r[0x0a/2] ^= P32XV_FS; |
| 398 | Pico32xSwapDRAM(d ^ 1); |
| 399 | elprintf(EL_32X, "VDP FS: %d", r[0x0a/2] & P32XV_FS); |
| 400 | } |
| 401 | break; |
| 402 | } |
| 403 | } |
| 404 | |
| 405 | static void p32x_vdp_write16(u32 a, u32 d, u32 cycles) |
| 406 | { |
| 407 | a &= 0x0e; |
| 408 | if (a == 6) { // fill start |
| 409 | Pico32x.vdp_regs[6 / 2] = d; |
| 410 | return; |
| 411 | } |
| 412 | if (a == 8) { // fill data |
| 413 | u16 *dram = Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1]; |
| 414 | int len = Pico32x.vdp_regs[4 / 2] + 1; |
| 415 | int len1 = len; |
| 416 | a = Pico32x.vdp_regs[6 / 2]; |
| 417 | while (len1--) { |
| 418 | dram[a] = d; |
| 419 | a = (a & 0xff00) | ((a + 1) & 0xff); |
| 420 | } |
| 421 | Pico32x.vdp_regs[0x06 / 2] = a; |
| 422 | Pico32x.vdp_regs[0x08 / 2] = d; |
| 423 | if (cycles > 0) { |
| 424 | Pico32x.vdp_regs[0x0a / 2] |= P32XV_nFEN; |
| 425 | p32x_event_schedule(P32X_EVENT_FILLEND, cycles, len); |
| 426 | } |
| 427 | return; |
| 428 | } |
| 429 | |
| 430 | p32x_vdp_write8(a | 1, d); |
| 431 | } |
| 432 | |
| 433 | // ------------------------------------------------------------------ |
| 434 | // SH2 regs |
| 435 | |
| 436 | static u32 p32x_sh2reg_read16(u32 a, int cpuid) |
| 437 | { |
| 438 | u16 *r = Pico32x.regs; |
| 439 | a &= 0xfe; // ? |
| 440 | |
| 441 | switch (a) { |
| 442 | case 0x00: // adapter/irq ctl |
| 443 | return (r[0] & P32XS_FM) | Pico32x.sh2_regs[0] | Pico32x.sh2irq_mask[cpuid]; |
| 444 | case 0x04: // H count (often as comm too) |
| 445 | if (p32x_poll_detect(&sh2_poll[cpuid], a, ash2_cycles_done(), 0)) |
| 446 | ash2_end_run(8); |
| 447 | return Pico32x.sh2_regs[4 / 2]; |
| 448 | case 0x10: // DREQ len |
| 449 | return r[a / 2]; |
| 450 | } |
| 451 | |
| 452 | // DREQ src, dst |
| 453 | if ((a & 0x38) == 0x08) |
| 454 | return r[a / 2]; |
| 455 | // comm port |
| 456 | if ((a & 0x30) == 0x20) { |
| 457 | int comreg = 1 << (a & 0x0f) / 2; |
| 458 | if (Pico32x.comm_dirty_68k & comreg) |
| 459 | Pico32x.comm_dirty_68k &= ~comreg; |
| 460 | else if (p32x_poll_detect(&sh2_poll[cpuid], a, ash2_cycles_done(), 0)) |
| 461 | ash2_end_run(8); |
| 462 | return r[a / 2]; |
| 463 | } |
| 464 | if ((a & 0x30) == 0x30) { |
| 465 | sh2_poll[cpuid].cnt = 0; |
| 466 | return p32x_pwm_read16(a); |
| 467 | } |
| 468 | |
| 469 | return 0; |
| 470 | } |
| 471 | |
| 472 | static void p32x_sh2reg_write8(u32 a, u32 d, int cpuid) |
| 473 | { |
| 474 | a &= 0xff; |
| 475 | switch (a) { |
| 476 | case 0: // FM |
| 477 | Pico32x.regs[0] &= ~P32XS_FM; |
| 478 | Pico32x.regs[0] |= (d << 8) & P32XS_FM; |
| 479 | return; |
| 480 | case 1: // |
| 481 | Pico32x.sh2irq_mask[cpuid] = d & 0x8f; |
| 482 | Pico32x.sh2_regs[0] &= ~0x80; |
| 483 | Pico32x.sh2_regs[0] |= d & 0x80; |
| 484 | if (d & 1) |
| 485 | p32x_pwm_schedule(sh2s[cpuid].m68krcycles_done); // XXX: timing? |
| 486 | p32x_update_irls(1); |
| 487 | return; |
| 488 | case 5: // H count |
| 489 | Pico32x.sh2_regs[4 / 2] = d & 0xff; |
| 490 | p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0); |
| 491 | return; |
| 492 | } |
| 493 | |
| 494 | if ((a & 0x30) == 0x20) { |
| 495 | u8 *r8 = (u8 *)Pico32x.regs; |
| 496 | int comreg; |
| 497 | if (r8[a ^ 1] == d) |
| 498 | return; |
| 499 | |
| 500 | r8[a ^ 1] = d; |
| 501 | if (p32x_poll_undetect(&m68k_poll, 0)) |
| 502 | SekSetStop(0); |
| 503 | p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0); |
| 504 | comreg = 1 << (a & 0x0f) / 2; |
| 505 | Pico32x.comm_dirty_sh2 |= comreg; |
| 506 | return; |
| 507 | } |
| 508 | } |
| 509 | |
| 510 | static void p32x_sh2reg_write16(u32 a, u32 d, int cpuid) |
| 511 | { |
| 512 | a &= 0xfe; |
| 513 | |
| 514 | // comm |
| 515 | if ((a & 0x30) == 0x20) { |
| 516 | int comreg; |
| 517 | if (Pico32x.regs[a / 2] == d) |
| 518 | return; |
| 519 | |
| 520 | Pico32x.regs[a / 2] = d; |
| 521 | if (p32x_poll_undetect(&m68k_poll, 0)) |
| 522 | SekSetStop(0); |
| 523 | p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0); |
| 524 | comreg = 1 << (a & 0x0f) / 2; |
| 525 | Pico32x.comm_dirty_sh2 |= comreg; |
| 526 | return; |
| 527 | } |
| 528 | // PWM |
| 529 | else if ((a & 0x30) == 0x30) { |
| 530 | p32x_pwm_write16(a, d); |
| 531 | return; |
| 532 | } |
| 533 | |
| 534 | switch (a) { |
| 535 | case 0: // FM |
| 536 | Pico32x.regs[0] &= ~P32XS_FM; |
| 537 | Pico32x.regs[0] |= d & P32XS_FM; |
| 538 | break; |
| 539 | case 0x14: Pico32x.sh2irqs &= ~P32XI_VRES; goto irls; |
| 540 | case 0x16: Pico32x.sh2irqs &= ~P32XI_VINT; goto irls; |
| 541 | case 0x18: Pico32x.sh2irqs &= ~P32XI_HINT; goto irls; |
| 542 | case 0x1a: Pico32x.sh2irqi[cpuid] &= ~P32XI_CMD; goto irls; |
| 543 | case 0x1c: |
| 544 | Pico32x.sh2irqs &= ~P32XI_PWM; |
| 545 | if (!(Pico32x.emu_flags & P32XF_PWM_PEND)) |
| 546 | p32x_pwm_schedule(sh2s[cpuid].m68krcycles_done); // timing? |
| 547 | goto irls; |
| 548 | } |
| 549 | |
| 550 | p32x_sh2reg_write8(a | 1, d, cpuid); |
| 551 | return; |
| 552 | |
| 553 | irls: |
| 554 | p32x_update_irls(1); |
| 555 | } |
| 556 | |
| 557 | // ------------------------------------------------------------------ |
| 558 | // SH2 internal peripherals |
| 559 | // we keep them in little endian format |
| 560 | static u32 sh2_peripheral_read8(u32 a, int id) |
| 561 | { |
| 562 | u8 *r = (void *)Pico32xMem->sh2_peri_regs[id]; |
| 563 | u32 d; |
| 564 | |
| 565 | a &= 0x1ff; |
| 566 | d = PREG8(r, a); |
| 567 | |
| 568 | elprintf(EL_32X, "%csh2 peri r8 [%08x] %02x @%06x", id ? 's' : 'm', a | ~0x1ff, d, sh2_pc(id)); |
| 569 | return d; |
| 570 | } |
| 571 | |
| 572 | static u32 sh2_peripheral_read16(u32 a, int id) |
| 573 | { |
| 574 | u16 *r = (void *)Pico32xMem->sh2_peri_regs[id]; |
| 575 | u32 d; |
| 576 | |
| 577 | a &= 0x1ff; |
| 578 | d = r[(a / 2) ^ 1]; |
| 579 | |
| 580 | elprintf(EL_32X, "%csh2 peri r16 [%08x] %04x @%06x", id ? 's' : 'm', a | ~0x1ff, d, sh2_pc(id)); |
| 581 | return d; |
| 582 | } |
| 583 | |
| 584 | static u32 sh2_peripheral_read32(u32 a, int id) |
| 585 | { |
| 586 | u32 d; |
| 587 | a &= 0x1fc; |
| 588 | d = Pico32xMem->sh2_peri_regs[id][a / 4]; |
| 589 | |
| 590 | elprintf(EL_32X, "%csh2 peri r32 [%08x] %08x @%06x", id ? 's' : 'm', a | ~0x1ff, d, sh2_pc(id)); |
| 591 | return d; |
| 592 | } |
| 593 | |
| 594 | static int REGPARM(3) sh2_peripheral_write8(u32 a, u32 d, int id) |
| 595 | { |
| 596 | u8 *r = (void *)Pico32xMem->sh2_peri_regs[id]; |
| 597 | elprintf(EL_32X, "%csh2 peri w8 [%08x] %02x @%06x", id ? 's' : 'm', a, d, sh2_pc(id)); |
| 598 | |
| 599 | a &= 0x1ff; |
| 600 | PREG8(r, a) = d; |
| 601 | |
| 602 | // X-men SCI hack |
| 603 | if ((a == 2 && (d & 0x20)) || // transmiter enabled |
| 604 | (a == 4 && !(d & 0x80))) { // valid data in TDR |
| 605 | void *oregs = Pico32xMem->sh2_peri_regs[id ^ 1]; |
| 606 | if ((PREG8(oregs, 2) & 0x50) == 0x50) { // receiver + irq enabled |
| 607 | int level = PREG8(oregs, 0x60) >> 4; |
| 608 | int vector = PREG8(oregs, 0x63) & 0x7f; |
| 609 | elprintf(EL_32X, "%csh2 SCI recv irq (%d, %d)", (id ^ 1) ? 's' : 'm', level, vector); |
| 610 | sh2_internal_irq(&sh2s[id ^ 1], level, vector); |
| 611 | return 1; |
| 612 | } |
| 613 | } |
| 614 | return 0; |
| 615 | } |
| 616 | |
| 617 | static int REGPARM(3) sh2_peripheral_write16(u32 a, u32 d, int id) |
| 618 | { |
| 619 | u16 *r = (void *)Pico32xMem->sh2_peri_regs[id]; |
| 620 | elprintf(EL_32X, "%csh2 peri w16 [%08x] %04x @%06x", id ? 's' : 'm', a, d, sh2_pc(id)); |
| 621 | |
| 622 | a &= 0x1ff; |
| 623 | |
| 624 | // evil WDT |
| 625 | if (a == 0x80) { |
| 626 | if ((d & 0xff00) == 0xa500) { // WTCSR |
| 627 | PREG8(r, 0x80) = d; |
| 628 | p32x_timers_recalc(); |
| 629 | } |
| 630 | if ((d & 0xff00) == 0x5a00) // WTCNT |
| 631 | PREG8(r, 0x81) = d; |
| 632 | return 0; |
| 633 | } |
| 634 | |
| 635 | r[(a / 2) ^ 1] = d; |
| 636 | return 0; |
| 637 | } |
| 638 | |
| 639 | static void sh2_peripheral_write32(u32 a, u32 d, int id) |
| 640 | { |
| 641 | u32 *r = Pico32xMem->sh2_peri_regs[id]; |
| 642 | elprintf(EL_32X, "%csh2 peri w32 [%08x] %08x @%06x", id ? 's' : 'm', a, d, sh2_pc(id)); |
| 643 | |
| 644 | a &= 0x1fc; |
| 645 | r[a / 4] = d; |
| 646 | |
| 647 | switch (a) { |
| 648 | // division unit (TODO: verify): |
| 649 | case 0x104: // DVDNT: divident L, starts divide |
| 650 | elprintf(EL_32X, "%csh2 divide %08x / %08x", id ? 's' : 'm', d, r[0x100 / 4]); |
| 651 | if (r[0x100 / 4]) { |
| 652 | signed int divisor = r[0x100 / 4]; |
| 653 | r[0x118 / 4] = r[0x110 / 4] = (signed int)d % divisor; |
| 654 | r[0x104 / 4] = r[0x11c / 4] = r[0x114 / 4] = (signed int)d / divisor; |
| 655 | } |
| 656 | else |
| 657 | r[0x110 / 4] = r[0x114 / 4] = r[0x118 / 4] = r[0x11c / 4] = 0; // ? |
| 658 | break; |
| 659 | case 0x114: |
| 660 | elprintf(EL_32X, "%csh2 divide %08x%08x / %08x @%08x", |
| 661 | id ? 's' : 'm', r[0x110 / 4], d, r[0x100 / 4], sh2_pc(id)); |
| 662 | if (r[0x100 / 4]) { |
| 663 | signed long long divident = (signed long long)r[0x110 / 4] << 32 | d; |
| 664 | signed int divisor = r[0x100 / 4]; |
| 665 | // XXX: undocumented mirroring to 0x118,0x11c? |
| 666 | r[0x118 / 4] = r[0x110 / 4] = divident % divisor; |
| 667 | divident /= divisor; |
| 668 | r[0x11c / 4] = r[0x114 / 4] = divident; |
| 669 | divident >>= 31; |
| 670 | if ((unsigned long long)divident + 1 > 1) { |
| 671 | //elprintf(EL_32X, "%csh2 divide overflow! @%08x", id ? 's' : 'm', sh2_pc(id)); |
| 672 | r[0x11c / 4] = r[0x114 / 4] = divident > 0 ? 0x7fffffff : 0x80000000; // overflow |
| 673 | } |
| 674 | } |
| 675 | else |
| 676 | r[0x110 / 4] = r[0x114 / 4] = r[0x118 / 4] = r[0x11c / 4] = 0; // ? |
| 677 | break; |
| 678 | } |
| 679 | |
| 680 | if ((a == 0x1b0 || a == 0x18c) && (dmac0->chcr0 & 3) == 1 && (dmac0->dmaor & 1)) { |
| 681 | elprintf(EL_32X, "sh2 DMA %08x -> %08x, cnt %d, chcr %04x @%06x", |
| 682 | dmac0->sar0, dmac0->dar0, dmac0->tcr0, dmac0->chcr0, sh2_pc(id)); |
| 683 | dmac0->tcr0 &= 0xffffff; |
| 684 | |
| 685 | // HACK: assume 68k starts writing soon and end the timeslice |
| 686 | ash2_end_run(16); |
| 687 | |
| 688 | // DREQ is only sent after first 4 words are written. |
| 689 | // we do multiple of 4 words to avoid messing up alignment |
| 690 | if (dmac0->sar0 == 0x20004012 && Pico32x.dmac_ptr && (Pico32x.dmac_ptr & 3) == 0) { |
| 691 | elprintf(EL_32X, "68k -> sh2 DMA"); |
| 692 | dma_68k2sh2_do(); |
| 693 | } |
| 694 | } |
| 695 | } |
| 696 | |
| 697 | // ------------------------------------------------------------------ |
| 698 | // 32x handlers |
| 699 | |
| 700 | // after ADEN |
| 701 | static u32 PicoRead8_32x_on(u32 a) |
| 702 | { |
| 703 | u32 d = 0; |
| 704 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| 705 | d = p32x_reg_read16(a); |
| 706 | goto out_16to8; |
| 707 | } |
| 708 | |
| 709 | if ((a & 0xfc00) != 0x5000) |
| 710 | return PicoRead8_io(a); |
| 711 | |
| 712 | if ((a & 0xfff0) == 0x5180) { // a15180 |
| 713 | d = p32x_vdp_read16(a); |
| 714 | goto out_16to8; |
| 715 | } |
| 716 | |
| 717 | if ((a & 0xfe00) == 0x5200) { // a15200 |
| 718 | d = Pico32xMem->pal[(a & 0x1ff) / 2]; |
| 719 | goto out_16to8; |
| 720 | } |
| 721 | |
| 722 | if ((a & 0xfffc) == 0x30ec) { // a130ec |
| 723 | d = str_mars[a & 3]; |
| 724 | goto out; |
| 725 | } |
| 726 | |
| 727 | elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc); |
| 728 | return d; |
| 729 | |
| 730 | out_16to8: |
| 731 | if (a & 1) |
| 732 | d &= 0xff; |
| 733 | else |
| 734 | d >>= 8; |
| 735 | |
| 736 | out: |
| 737 | elprintf(EL_32X, "m68k 32x r8 [%06x] %02x @%06x", a, d, SekPc); |
| 738 | return d; |
| 739 | } |
| 740 | |
| 741 | static u32 PicoRead16_32x_on(u32 a) |
| 742 | { |
| 743 | u32 d = 0; |
| 744 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| 745 | d = p32x_reg_read16(a); |
| 746 | goto out; |
| 747 | } |
| 748 | |
| 749 | if ((a & 0xfc00) != 0x5000) |
| 750 | return PicoRead16_io(a); |
| 751 | |
| 752 | if ((a & 0xfff0) == 0x5180) { // a15180 |
| 753 | d = p32x_vdp_read16(a); |
| 754 | goto out; |
| 755 | } |
| 756 | |
| 757 | if ((a & 0xfe00) == 0x5200) { // a15200 |
| 758 | d = Pico32xMem->pal[(a & 0x1ff) / 2]; |
| 759 | goto out; |
| 760 | } |
| 761 | |
| 762 | if ((a & 0xfffc) == 0x30ec) { // a130ec |
| 763 | d = !(a & 2) ? ('M'<<8)|'A' : ('R'<<8)|'S'; |
| 764 | goto out; |
| 765 | } |
| 766 | |
| 767 | elprintf(EL_UIO, "m68k unmapped r16 [%06x] @%06x", a, SekPc); |
| 768 | return d; |
| 769 | |
| 770 | out: |
| 771 | elprintf(EL_32X, "m68k 32x r16 [%06x] %04x @%06x", a, d, SekPc); |
| 772 | return d; |
| 773 | } |
| 774 | |
| 775 | static void PicoWrite8_32x_on(u32 a, u32 d) |
| 776 | { |
| 777 | if ((a & 0xfc00) == 0x5000) |
| 778 | elprintf(EL_32X, "m68k 32x w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
| 779 | |
| 780 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| 781 | p32x_reg_write8(a, d); |
| 782 | return; |
| 783 | } |
| 784 | |
| 785 | if ((a & 0xfc00) != 0x5000) { |
| 786 | PicoWrite8_io(a, d); |
| 787 | return; |
| 788 | } |
| 789 | |
| 790 | if ((a & 0xfff0) == 0x5180) { // a15180 |
| 791 | p32x_vdp_write8(a, d); |
| 792 | return; |
| 793 | } |
| 794 | |
| 795 | // TODO: verify |
| 796 | if ((a & 0xfe00) == 0x5200) { // a15200 |
| 797 | elprintf(EL_32X|EL_ANOMALY, "m68k 32x PAL w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
| 798 | ((u8 *)Pico32xMem->pal)[(a & 0x1ff) ^ 1] = d; |
| 799 | Pico32x.dirty_pal = 1; |
| 800 | return; |
| 801 | } |
| 802 | |
| 803 | elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
| 804 | } |
| 805 | |
| 806 | static void PicoWrite16_32x_on(u32 a, u32 d) |
| 807 | { |
| 808 | if ((a & 0xfc00) == 0x5000) |
| 809 | elprintf(EL_32X, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
| 810 | |
| 811 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| 812 | p32x_reg_write16(a, d); |
| 813 | return; |
| 814 | } |
| 815 | |
| 816 | if ((a & 0xfc00) != 0x5000) { |
| 817 | PicoWrite16_io(a, d); |
| 818 | return; |
| 819 | } |
| 820 | |
| 821 | if ((a & 0xfff0) == 0x5180) { // a15180 |
| 822 | p32x_vdp_write16(a, d, 0); // FIXME? |
| 823 | return; |
| 824 | } |
| 825 | |
| 826 | if ((a & 0xfe00) == 0x5200) { // a15200 |
| 827 | Pico32xMem->pal[(a & 0x1ff) / 2] = d; |
| 828 | Pico32x.dirty_pal = 1; |
| 829 | return; |
| 830 | } |
| 831 | |
| 832 | elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
| 833 | } |
| 834 | |
| 835 | // before ADEN |
| 836 | u32 PicoRead8_32x(u32 a) |
| 837 | { |
| 838 | u32 d = 0; |
| 839 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| 840 | // regs are always readable |
| 841 | d = ((u8 *)Pico32x.regs)[(a & 0x3f) ^ 1]; |
| 842 | goto out; |
| 843 | } |
| 844 | |
| 845 | if ((a & 0xfffc) == 0x30ec) { // a130ec |
| 846 | d = str_mars[a & 3]; |
| 847 | goto out; |
| 848 | } |
| 849 | |
| 850 | elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc); |
| 851 | return d; |
| 852 | |
| 853 | out: |
| 854 | elprintf(EL_32X, "m68k 32x r8 [%06x] %02x @%06x", a, d, SekPc); |
| 855 | return d; |
| 856 | } |
| 857 | |
| 858 | u32 PicoRead16_32x(u32 a) |
| 859 | { |
| 860 | u32 d = 0; |
| 861 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| 862 | d = Pico32x.regs[(a & 0x3f) / 2]; |
| 863 | goto out; |
| 864 | } |
| 865 | |
| 866 | if ((a & 0xfffc) == 0x30ec) { // a130ec |
| 867 | d = !(a & 2) ? ('M'<<8)|'A' : ('R'<<8)|'S'; |
| 868 | goto out; |
| 869 | } |
| 870 | |
| 871 | elprintf(EL_UIO, "m68k unmapped r16 [%06x] @%06x", a, SekPc); |
| 872 | return d; |
| 873 | |
| 874 | out: |
| 875 | elprintf(EL_32X, "m68k 32x r16 [%06x] %04x @%06x", a, d, SekPc); |
| 876 | return d; |
| 877 | } |
| 878 | |
| 879 | void PicoWrite8_32x(u32 a, u32 d) |
| 880 | { |
| 881 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| 882 | u16 *r = Pico32x.regs; |
| 883 | |
| 884 | elprintf(EL_32X, "m68k 32x w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
| 885 | a &= 0x3f; |
| 886 | if (a == 1) { |
| 887 | if ((d ^ r[0]) & d & P32XS_ADEN) { |
| 888 | Pico32xStartup(); |
| 889 | r[0] &= ~P32XS_nRES; // causes reset if specified by this write |
| 890 | r[0] |= P32XS_ADEN; |
| 891 | p32x_reg_write8(a, d); // forward for reset processing |
| 892 | } |
| 893 | return; |
| 894 | } |
| 895 | |
| 896 | // allow only COMM for now |
| 897 | if ((a & 0x30) == 0x20) { |
| 898 | u8 *r8 = (u8 *)r; |
| 899 | r8[a ^ 1] = d; |
| 900 | } |
| 901 | return; |
| 902 | } |
| 903 | |
| 904 | elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
| 905 | } |
| 906 | |
| 907 | void PicoWrite16_32x(u32 a, u32 d) |
| 908 | { |
| 909 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| 910 | u16 *r = Pico32x.regs; |
| 911 | |
| 912 | elprintf(EL_UIO, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
| 913 | a &= 0x3e; |
| 914 | if (a == 0) { |
| 915 | if ((d ^ r[0]) & d & P32XS_ADEN) { |
| 916 | Pico32xStartup(); |
| 917 | r[0] &= ~P32XS_nRES; // causes reset if specified by this write |
| 918 | r[0] |= P32XS_ADEN; |
| 919 | p32x_reg_write16(a, d); // forward for reset processing |
| 920 | } |
| 921 | return; |
| 922 | } |
| 923 | |
| 924 | // allow only COMM for now |
| 925 | if ((a & 0x30) == 0x20) |
| 926 | r[a / 2] = d; |
| 927 | return; |
| 928 | } |
| 929 | |
| 930 | elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
| 931 | } |
| 932 | |
| 933 | // ----------------------------------------------------------------- |
| 934 | |
| 935 | // hint vector is writeable |
| 936 | static void PicoWrite8_hint(u32 a, u32 d) |
| 937 | { |
| 938 | if ((a & 0xfffc) == 0x0070) { |
| 939 | Pico32xMem->m68k_rom[a ^ 1] = d; |
| 940 | return; |
| 941 | } |
| 942 | |
| 943 | elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
| 944 | } |
| 945 | |
| 946 | static void PicoWrite16_hint(u32 a, u32 d) |
| 947 | { |
| 948 | if ((a & 0xfffc) == 0x0070) { |
| 949 | ((u16 *)Pico32xMem->m68k_rom)[a/2] = d; |
| 950 | return; |
| 951 | } |
| 952 | |
| 953 | elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
| 954 | } |
| 955 | |
| 956 | static void bank_switch(int b) |
| 957 | { |
| 958 | unsigned int rs, bank; |
| 959 | |
| 960 | bank = b << 20; |
| 961 | if (bank >= Pico.romsize) { |
| 962 | elprintf(EL_32X|EL_ANOMALY, "missing bank @ %06x", bank); |
| 963 | return; |
| 964 | } |
| 965 | |
| 966 | // 32X ROM (unbanked, XXX: consider mirroring?) |
| 967 | rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK; |
| 968 | rs -= bank; |
| 969 | if (rs > 0x100000) |
| 970 | rs = 0x100000; |
| 971 | cpu68k_map_set(m68k_read8_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0); |
| 972 | cpu68k_map_set(m68k_read16_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0); |
| 973 | |
| 974 | elprintf(EL_32X, "bank %06x-%06x -> %06x", 0x900000, 0x900000 + rs - 1, bank); |
| 975 | |
| 976 | #ifdef EMU_F68K |
| 977 | // setup FAME fetchmap |
| 978 | for (rs = 0x90; rs < 0xa0; rs++) |
| 979 | PicoCpuFM68k.Fetch[rs] = (unsigned long)Pico.rom + bank - 0x900000; |
| 980 | #endif |
| 981 | } |
| 982 | |
| 983 | // ----------------------------------------------------------------- |
| 984 | // SH2 |
| 985 | // ----------------------------------------------------------------- |
| 986 | |
| 987 | // read8 |
| 988 | static u32 sh2_read8_unmapped(u32 a, int id) |
| 989 | { |
| 990 | elprintf(EL_UIO, "%csh2 unmapped r8 [%08x] %02x @%06x", |
| 991 | id ? 's' : 'm', a, 0, sh2_pc(id)); |
| 992 | return 0; |
| 993 | } |
| 994 | |
| 995 | static u32 sh2_read8_cs0(u32 a, int id) |
| 996 | { |
| 997 | u32 d = 0; |
| 998 | |
| 999 | // 0x3ff00 is veridied |
| 1000 | if ((a & 0x3ff00) == 0x4000) { |
| 1001 | d = p32x_sh2reg_read16(a, id); |
| 1002 | goto out_16to8; |
| 1003 | } |
| 1004 | |
| 1005 | if ((a & 0x3ff00) == 0x4100) { |
| 1006 | d = p32x_vdp_read16(a); |
| 1007 | if (p32x_poll_detect(&sh2_poll[id], a, ash2_cycles_done(), 1)) |
| 1008 | ash2_end_run(8); |
| 1009 | goto out_16to8; |
| 1010 | } |
| 1011 | |
| 1012 | // TODO: mirroring? |
| 1013 | if (id == 0 && a < sizeof(Pico32xMem->sh2_rom_m)) |
| 1014 | return Pico32xMem->sh2_rom_m[a ^ 1]; |
| 1015 | if (id == 1 && a < sizeof(Pico32xMem->sh2_rom_s)) |
| 1016 | return Pico32xMem->sh2_rom_s[a ^ 1]; |
| 1017 | |
| 1018 | if ((a & 0x3fe00) == 0x4200) { |
| 1019 | d = Pico32xMem->pal[(a & 0x1ff) / 2]; |
| 1020 | goto out_16to8; |
| 1021 | } |
| 1022 | |
| 1023 | return sh2_read8_unmapped(a, id); |
| 1024 | |
| 1025 | out_16to8: |
| 1026 | if (a & 1) |
| 1027 | d &= 0xff; |
| 1028 | else |
| 1029 | d >>= 8; |
| 1030 | |
| 1031 | elprintf(EL_32X, "%csh2 r8 [%08x] %02x @%06x", |
| 1032 | id ? 's' : 'm', a, d, sh2_pc(id)); |
| 1033 | return d; |
| 1034 | } |
| 1035 | |
| 1036 | static u32 sh2_read8_da(u32 a, int id) |
| 1037 | { |
| 1038 | return Pico32xMem->data_array[id][(a & 0xfff) ^ 1]; |
| 1039 | } |
| 1040 | |
| 1041 | // read16 |
| 1042 | static u32 sh2_read16_unmapped(u32 a, int id) |
| 1043 | { |
| 1044 | elprintf(EL_UIO, "%csh2 unmapped r16 [%08x] %04x @%06x", |
| 1045 | id ? 's' : 'm', a, 0, sh2_pc(id)); |
| 1046 | return 0; |
| 1047 | } |
| 1048 | |
| 1049 | static u32 sh2_read16_cs0(u32 a, int id) |
| 1050 | { |
| 1051 | u32 d = 0; |
| 1052 | |
| 1053 | if ((a & 0x3ff00) == 0x4000) { |
| 1054 | d = p32x_sh2reg_read16(a, id); |
| 1055 | if (!(EL_LOGMASK & EL_PWM) && (a & 0x30) == 0x30) // hide PWM |
| 1056 | return d; |
| 1057 | goto out; |
| 1058 | } |
| 1059 | |
| 1060 | if ((a & 0x3ff00) == 0x4100) { |
| 1061 | d = p32x_vdp_read16(a); |
| 1062 | if (p32x_poll_detect(&sh2_poll[id], a, ash2_cycles_done(), 1)) |
| 1063 | ash2_end_run(8); |
| 1064 | goto out; |
| 1065 | } |
| 1066 | |
| 1067 | if (id == 0 && a < sizeof(Pico32xMem->sh2_rom_m)) |
| 1068 | return *(u16 *)(Pico32xMem->sh2_rom_m + a); |
| 1069 | if (id == 1 && a < sizeof(Pico32xMem->sh2_rom_s)) |
| 1070 | return *(u16 *)(Pico32xMem->sh2_rom_s + a); |
| 1071 | |
| 1072 | if ((a & 0x3fe00) == 0x4200) { |
| 1073 | d = Pico32xMem->pal[(a & 0x1ff) / 2]; |
| 1074 | goto out; |
| 1075 | } |
| 1076 | |
| 1077 | return sh2_read16_unmapped(a, id); |
| 1078 | |
| 1079 | out: |
| 1080 | elprintf(EL_32X, "%csh2 r16 [%08x] %04x @%06x", |
| 1081 | id ? 's' : 'm', a, d, sh2_pc(id)); |
| 1082 | return d; |
| 1083 | } |
| 1084 | |
| 1085 | static u32 sh2_read16_da(u32 a, int id) |
| 1086 | { |
| 1087 | return ((u16 *)Pico32xMem->data_array[id])[(a & 0xfff) / 2]; |
| 1088 | } |
| 1089 | |
| 1090 | static int REGPARM(3) sh2_write_ignore(u32 a, u32 d, int id) |
| 1091 | { |
| 1092 | return 0; |
| 1093 | } |
| 1094 | |
| 1095 | // write8 |
| 1096 | static int REGPARM(3) sh2_write8_unmapped(u32 a, u32 d, int id) |
| 1097 | { |
| 1098 | elprintf(EL_UIO, "%csh2 unmapped w8 [%08x] %02x @%06x", |
| 1099 | id ? 's' : 'm', a, d & 0xff, sh2_pc(id)); |
| 1100 | return 0; |
| 1101 | } |
| 1102 | |
| 1103 | static int REGPARM(3) sh2_write8_cs0(u32 a, u32 d, int id) |
| 1104 | { |
| 1105 | elprintf(EL_32X, "%csh2 w8 [%08x] %02x @%06x", |
| 1106 | id ? 's' : 'm', a, d & 0xff, sh2_pc(id)); |
| 1107 | |
| 1108 | if ((a & 0x3ff00) == 0x4100) { |
| 1109 | p32x_vdp_write8(a, d); |
| 1110 | return 0; |
| 1111 | } |
| 1112 | |
| 1113 | if ((a & 0x3ff00) == 0x4000) { |
| 1114 | p32x_sh2reg_write8(a, d, id); |
| 1115 | return 1; |
| 1116 | } |
| 1117 | |
| 1118 | return sh2_write8_unmapped(a, d, id); |
| 1119 | } |
| 1120 | |
| 1121 | /* quirk: in both normal and overwrite areas only nonzero values go through */ |
| 1122 | #define sh2_write8_dramN(n) \ |
| 1123 | if ((d & 0xff) != 0) { \ |
| 1124 | u8 *dram = (u8 *)Pico32xMem->dram[n]; \ |
| 1125 | dram[(a & 0x1ffff) ^ 1] = d; \ |
| 1126 | } \ |
| 1127 | return 0; |
| 1128 | |
| 1129 | static int REGPARM(3) sh2_write8_dram0(u32 a, u32 d, int id) |
| 1130 | { |
| 1131 | sh2_write8_dramN(0); |
| 1132 | } |
| 1133 | |
| 1134 | static int REGPARM(3) sh2_write8_dram1(u32 a, u32 d, int id) |
| 1135 | { |
| 1136 | sh2_write8_dramN(1); |
| 1137 | } |
| 1138 | |
| 1139 | static int REGPARM(3) sh2_write8_sdram(u32 a, u32 d, int id) |
| 1140 | { |
| 1141 | u32 a1 = a & 0x3ffff; |
| 1142 | #ifdef DRC_SH2 |
| 1143 | int t = Pico32xMem->drcblk_ram[a1 >> SH2_DRCBLK_RAM_SHIFT]; |
| 1144 | if (t) |
| 1145 | sh2_drc_wcheck_ram(a, t, id); |
| 1146 | #endif |
| 1147 | Pico32xMem->sdram[a1 ^ 1] = d; |
| 1148 | return 0; |
| 1149 | } |
| 1150 | |
| 1151 | static int REGPARM(3) sh2_write8_da(u32 a, u32 d, int id) |
| 1152 | { |
| 1153 | u32 a1 = a & 0xfff; |
| 1154 | #ifdef DRC_SH2 |
| 1155 | int t = Pico32xMem->drcblk_da[id][a1 >> SH2_DRCBLK_DA_SHIFT]; |
| 1156 | if (t) |
| 1157 | sh2_drc_wcheck_da(a, t, id); |
| 1158 | #endif |
| 1159 | Pico32xMem->data_array[id][a1 ^ 1] = d; |
| 1160 | return 0; |
| 1161 | } |
| 1162 | |
| 1163 | // write16 |
| 1164 | static int REGPARM(3) sh2_write16_unmapped(u32 a, u32 d, int id) |
| 1165 | { |
| 1166 | elprintf(EL_UIO, "%csh2 unmapped w16 [%08x] %04x @%06x", |
| 1167 | id ? 's' : 'm', a, d & 0xffff, sh2_pc(id)); |
| 1168 | return 0; |
| 1169 | } |
| 1170 | |
| 1171 | static int REGPARM(3) sh2_write16_cs0(u32 a, u32 d, int id) |
| 1172 | { |
| 1173 | if (((EL_LOGMASK & EL_PWM) || (a & 0x30) != 0x30)) // hide PWM |
| 1174 | elprintf(EL_32X, "%csh2 w16 [%08x] %04x @%06x", |
| 1175 | id ? 's' : 'm', a, d & 0xffff, sh2_pc(id)); |
| 1176 | |
| 1177 | if ((a & 0x3ff00) == 0x4100) { |
| 1178 | sh2_poll[id].cnt = 0; // for poll before VDP accesses |
| 1179 | p32x_vdp_write16(a, d, sh2s[id].m68krcycles_done); |
| 1180 | return 0; |
| 1181 | } |
| 1182 | |
| 1183 | if ((a & 0x3fe00) == 0x4200) { |
| 1184 | Pico32xMem->pal[(a & 0x1ff) / 2] = d; |
| 1185 | Pico32x.dirty_pal = 1; |
| 1186 | return 0; |
| 1187 | } |
| 1188 | |
| 1189 | if ((a & 0x3ff00) == 0x4000) { |
| 1190 | p32x_sh2reg_write16(a, d, id); |
| 1191 | return 1; |
| 1192 | } |
| 1193 | |
| 1194 | return sh2_write16_unmapped(a, d, id); |
| 1195 | } |
| 1196 | |
| 1197 | #define sh2_write16_dramN(n) \ |
| 1198 | u16 *pd = &Pico32xMem->dram[n][(a & 0x1ffff) / 2]; \ |
| 1199 | if (!(a & 0x20000)) { \ |
| 1200 | *pd = d; \ |
| 1201 | return 0; \ |
| 1202 | } \ |
| 1203 | /* overwrite */ \ |
| 1204 | if (!(d & 0xff00)) d |= *pd & 0xff00; \ |
| 1205 | if (!(d & 0x00ff)) d |= *pd & 0x00ff; \ |
| 1206 | *pd = d; \ |
| 1207 | return 0 |
| 1208 | |
| 1209 | static int REGPARM(3) sh2_write16_dram0(u32 a, u32 d, int id) |
| 1210 | { |
| 1211 | sh2_write16_dramN(0); |
| 1212 | } |
| 1213 | |
| 1214 | static int REGPARM(3) sh2_write16_dram1(u32 a, u32 d, int id) |
| 1215 | { |
| 1216 | sh2_write16_dramN(1); |
| 1217 | } |
| 1218 | |
| 1219 | static int REGPARM(3) sh2_write16_sdram(u32 a, u32 d, int id) |
| 1220 | { |
| 1221 | u32 a1 = a & 0x3ffff; |
| 1222 | #ifdef DRC_SH2 |
| 1223 | int t = Pico32xMem->drcblk_ram[a1 >> SH2_DRCBLK_RAM_SHIFT]; |
| 1224 | if (t) |
| 1225 | sh2_drc_wcheck_ram(a, t, id); |
| 1226 | #endif |
| 1227 | ((u16 *)Pico32xMem->sdram)[a1 / 2] = d; |
| 1228 | return 0; |
| 1229 | } |
| 1230 | |
| 1231 | static int REGPARM(3) sh2_write16_da(u32 a, u32 d, int id) |
| 1232 | { |
| 1233 | u32 a1 = a & 0xfff; |
| 1234 | #ifdef DRC_SH2 |
| 1235 | int t = Pico32xMem->drcblk_da[id][a1 >> SH2_DRCBLK_DA_SHIFT]; |
| 1236 | if (t) |
| 1237 | sh2_drc_wcheck_da(a, t, id); |
| 1238 | #endif |
| 1239 | ((u16 *)Pico32xMem->data_array[id])[a1 / 2] = d; |
| 1240 | return 0; |
| 1241 | } |
| 1242 | |
| 1243 | |
| 1244 | typedef struct { |
| 1245 | uptr addr; // stores (membase >> 1) or ((handler >> 1) | (1<<31)) |
| 1246 | u32 mask; |
| 1247 | } sh2_memmap; |
| 1248 | |
| 1249 | typedef u32 (sh2_read_handler)(u32 a, int id); |
| 1250 | typedef int REGPARM(3) (sh2_write_handler)(u32 a, u32 d, int id); |
| 1251 | |
| 1252 | #define SH2MAP_ADDR2OFFS_R(a) \ |
| 1253 | ((((a) >> 25) & 3) | (((a) >> 27) & 0x1c)) |
| 1254 | |
| 1255 | #define SH2MAP_ADDR2OFFS_W(a) \ |
| 1256 | ((u32)(a) >> SH2_WRITE_SHIFT) |
| 1257 | |
| 1258 | u32 REGPARM(2) p32x_sh2_read8(u32 a, SH2 *sh2) |
| 1259 | { |
| 1260 | const sh2_memmap *sh2_map = sh2->read8_map; |
| 1261 | uptr p; |
| 1262 | |
| 1263 | sh2_map += SH2MAP_ADDR2OFFS_R(a); |
| 1264 | p = sh2_map->addr; |
| 1265 | if (map_flag_set(p)) |
| 1266 | return ((sh2_read_handler *)(p << 1))(a, sh2->is_slave); |
| 1267 | else |
| 1268 | return *(u8 *)((p << 1) + ((a & sh2_map->mask) ^ 1)); |
| 1269 | } |
| 1270 | |
| 1271 | u32 REGPARM(2) p32x_sh2_read16(u32 a, SH2 *sh2) |
| 1272 | { |
| 1273 | const sh2_memmap *sh2_map = sh2->read16_map; |
| 1274 | uptr p; |
| 1275 | |
| 1276 | sh2_map += SH2MAP_ADDR2OFFS_R(a); |
| 1277 | p = sh2_map->addr; |
| 1278 | if (map_flag_set(p)) |
| 1279 | return ((sh2_read_handler *)(p << 1))(a, sh2->is_slave); |
| 1280 | else |
| 1281 | return *(u16 *)((p << 1) + ((a & sh2_map->mask) & ~1)); |
| 1282 | } |
| 1283 | |
| 1284 | u32 REGPARM(2) p32x_sh2_read32(u32 a, SH2 *sh2) |
| 1285 | { |
| 1286 | const sh2_memmap *sh2_map = sh2->read16_map; |
| 1287 | sh2_read_handler *handler; |
| 1288 | u32 offs; |
| 1289 | uptr p; |
| 1290 | |
| 1291 | offs = SH2MAP_ADDR2OFFS_R(a); |
| 1292 | sh2_map += offs; |
| 1293 | p = sh2_map->addr; |
| 1294 | if (!map_flag_set(p)) { |
| 1295 | // XXX: maybe 32bit access instead with ror? |
| 1296 | u16 *pd = (u16 *)((p << 1) + ((a & sh2_map->mask) & ~1)); |
| 1297 | return (pd[0] << 16) | pd[1]; |
| 1298 | } |
| 1299 | |
| 1300 | if (offs == 0x1f) |
| 1301 | return sh2_peripheral_read32(a, sh2->is_slave); |
| 1302 | |
| 1303 | handler = (sh2_read_handler *)(p << 1); |
| 1304 | return (handler(a, sh2->is_slave) << 16) | handler(a + 2, sh2->is_slave); |
| 1305 | } |
| 1306 | |
| 1307 | // return nonzero if write potentially causes an interrupt (used by drc) |
| 1308 | int REGPARM(3) p32x_sh2_write8(u32 a, u32 d, SH2 *sh2) |
| 1309 | { |
| 1310 | const void **sh2_wmap = sh2->write8_tab; |
| 1311 | sh2_write_handler *wh; |
| 1312 | |
| 1313 | wh = sh2_wmap[SH2MAP_ADDR2OFFS_W(a)]; |
| 1314 | return wh(a, d, sh2->is_slave); |
| 1315 | } |
| 1316 | |
| 1317 | int REGPARM(3) p32x_sh2_write16(u32 a, u32 d, SH2 *sh2) |
| 1318 | { |
| 1319 | const void **sh2_wmap = sh2->write16_tab; |
| 1320 | sh2_write_handler *wh; |
| 1321 | |
| 1322 | wh = sh2_wmap[SH2MAP_ADDR2OFFS_W(a)]; |
| 1323 | return wh(a, d, sh2->is_slave); |
| 1324 | } |
| 1325 | |
| 1326 | int REGPARM(3) p32x_sh2_write32(u32 a, u32 d, SH2 *sh2) |
| 1327 | { |
| 1328 | const void **sh2_wmap = sh2->write16_tab; |
| 1329 | sh2_write_handler *handler; |
| 1330 | u32 offs; |
| 1331 | |
| 1332 | offs = SH2MAP_ADDR2OFFS_W(a); |
| 1333 | |
| 1334 | if (offs == SH2MAP_ADDR2OFFS_W(0xffffc000)) { |
| 1335 | sh2_peripheral_write32(a, d, sh2->is_slave); |
| 1336 | return 0; |
| 1337 | } |
| 1338 | |
| 1339 | handler = sh2_wmap[offs]; |
| 1340 | handler(a, d >> 16, sh2->is_slave); |
| 1341 | handler(a + 2, d, sh2->is_slave); |
| 1342 | return 0; |
| 1343 | } |
| 1344 | |
| 1345 | // ----------------------------------------------------------------- |
| 1346 | |
| 1347 | static const u16 msh2_code[] = { |
| 1348 | // trap instructions |
| 1349 | 0xaffe, // bra <self> |
| 1350 | 0x0009, // nop |
| 1351 | // have to wait a bit until m68k initial program finishes clearing stuff |
| 1352 | // to avoid races with game SH2 code, like in Tempo |
| 1353 | 0xd004, // mov.l @(_m_ok,pc), r0 |
| 1354 | 0xd105, // mov.l @(_cnt,pc), r1 |
| 1355 | 0xd205, // mov.l @(_start,pc), r2 |
| 1356 | 0x71ff, // add #-1, r1 |
| 1357 | 0x4115, // cmp/pl r1 |
| 1358 | 0x89fc, // bt -2 |
| 1359 | 0xc208, // mov.l r0, @(h'20,gbr) |
| 1360 | 0x6822, // mov.l @r2, r8 |
| 1361 | 0x482b, // jmp @r8 |
| 1362 | 0x0009, // nop |
| 1363 | ('M'<<8)|'_', ('O'<<8)|'K', |
| 1364 | 0x0001, 0x0000, |
| 1365 | 0x2200, 0x03e0 // master start pointer in ROM |
| 1366 | }; |
| 1367 | |
| 1368 | static const u16 ssh2_code[] = { |
| 1369 | 0xaffe, // bra <self> |
| 1370 | 0x0009, // nop |
| 1371 | // code to wait for master, in case authentic master BIOS is used |
| 1372 | 0xd104, // mov.l @(_m_ok,pc), r1 |
| 1373 | 0xd206, // mov.l @(_start,pc), r2 |
| 1374 | 0xc608, // mov.l @(h'20,gbr), r0 |
| 1375 | 0x3100, // cmp/eq r0, r1 |
| 1376 | 0x8bfc, // bf #-2 |
| 1377 | 0xd003, // mov.l @(_s_ok,pc), r0 |
| 1378 | 0xc209, // mov.l r0, @(h'24,gbr) |
| 1379 | 0x6822, // mov.l @r2, r8 |
| 1380 | 0x482b, // jmp @r8 |
| 1381 | 0x0009, // nop |
| 1382 | ('M'<<8)|'_', ('O'<<8)|'K', |
| 1383 | ('S'<<8)|'_', ('O'<<8)|'K', |
| 1384 | 0x2200, 0x03e4 // slave start pointer in ROM |
| 1385 | }; |
| 1386 | |
| 1387 | #define HWSWAP(x) (((x) << 16) | ((x) >> 16)) |
| 1388 | static void get_bios(void) |
| 1389 | { |
| 1390 | u16 *ps; |
| 1391 | u32 *pl; |
| 1392 | int i; |
| 1393 | |
| 1394 | // M68K ROM |
| 1395 | if (p32x_bios_g != NULL) { |
| 1396 | elprintf(EL_STATUS|EL_32X, "32x: using supplied 68k BIOS"); |
| 1397 | Byteswap(Pico32xMem->m68k_rom, p32x_bios_g, sizeof(Pico32xMem->m68k_rom)); |
| 1398 | } |
| 1399 | else { |
| 1400 | // generate 68k ROM |
| 1401 | ps = (u16 *)Pico32xMem->m68k_rom; |
| 1402 | pl = (u32 *)ps; |
| 1403 | for (i = 1; i < 0xc0/4; i++) |
| 1404 | pl[i] = HWSWAP(0x880200 + (i - 1) * 6); |
| 1405 | |
| 1406 | // fill with nops |
| 1407 | for (i = 0xc0/2; i < 0x100/2; i++) |
| 1408 | ps[i] = 0x4e71; |
| 1409 | |
| 1410 | #if 0 |
| 1411 | ps[0xc0/2] = 0x46fc; |
| 1412 | ps[0xc2/2] = 0x2700; // move #0x2700,sr |
| 1413 | ps[0xfe/2] = 0x60fe; // jump to self |
| 1414 | #else |
| 1415 | ps[0xfe/2] = 0x4e75; // rts |
| 1416 | #endif |
| 1417 | } |
| 1418 | // fill remaining m68k_rom page with game ROM |
| 1419 | memcpy(Pico32xMem->m68k_rom_bank + sizeof(Pico32xMem->m68k_rom), |
| 1420 | Pico.rom + sizeof(Pico32xMem->m68k_rom), |
| 1421 | sizeof(Pico32xMem->m68k_rom_bank) - sizeof(Pico32xMem->m68k_rom)); |
| 1422 | |
| 1423 | // MSH2 |
| 1424 | if (p32x_bios_m != NULL) { |
| 1425 | elprintf(EL_STATUS|EL_32X, "32x: using supplied master SH2 BIOS"); |
| 1426 | Byteswap(Pico32xMem->sh2_rom_m, p32x_bios_m, sizeof(Pico32xMem->sh2_rom_m)); |
| 1427 | } |
| 1428 | else { |
| 1429 | pl = (u32 *)Pico32xMem->sh2_rom_m; |
| 1430 | |
| 1431 | // fill exception vector table to our trap address |
| 1432 | for (i = 0; i < 128; i++) |
| 1433 | pl[i] = HWSWAP(0x200); |
| 1434 | |
| 1435 | // startup code |
| 1436 | memcpy(Pico32xMem->sh2_rom_m + 0x200, msh2_code, sizeof(msh2_code)); |
| 1437 | |
| 1438 | // reset SP |
| 1439 | pl[1] = pl[3] = HWSWAP(0x6040000); |
| 1440 | // start |
| 1441 | pl[0] = pl[2] = HWSWAP(0x204); |
| 1442 | } |
| 1443 | |
| 1444 | // SSH2 |
| 1445 | if (p32x_bios_s != NULL) { |
| 1446 | elprintf(EL_STATUS|EL_32X, "32x: using supplied slave SH2 BIOS"); |
| 1447 | Byteswap(Pico32xMem->sh2_rom_s, p32x_bios_s, sizeof(Pico32xMem->sh2_rom_s)); |
| 1448 | } |
| 1449 | else { |
| 1450 | pl = (u32 *)Pico32xMem->sh2_rom_s; |
| 1451 | |
| 1452 | // fill exception vector table to our trap address |
| 1453 | for (i = 0; i < 128; i++) |
| 1454 | pl[i] = HWSWAP(0x200); |
| 1455 | |
| 1456 | // startup code |
| 1457 | memcpy(Pico32xMem->sh2_rom_s + 0x200, ssh2_code, sizeof(ssh2_code)); |
| 1458 | |
| 1459 | // reset SP |
| 1460 | pl[1] = pl[3] = HWSWAP(0x603f800); |
| 1461 | // start |
| 1462 | pl[0] = pl[2] = HWSWAP(0x204); |
| 1463 | } |
| 1464 | } |
| 1465 | |
| 1466 | #define MAP_MEMORY(m) ((uptr)(m) >> 1) |
| 1467 | #define MAP_HANDLER(h) ( ((uptr)(h) >> 1) | ((uptr)1 << (sizeof(uptr) * 8 - 1)) ) |
| 1468 | |
| 1469 | static sh2_memmap sh2_read8_map[0x20], sh2_read16_map[0x20]; |
| 1470 | // for writes we are using handlers only |
| 1471 | static sh2_write_handler *sh2_write8_map[0x80], *sh2_write16_map[0x80]; |
| 1472 | |
| 1473 | void Pico32xSwapDRAM(int b) |
| 1474 | { |
| 1475 | cpu68k_map_set(m68k_read8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); |
| 1476 | cpu68k_map_set(m68k_read16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); |
| 1477 | cpu68k_map_set(m68k_write8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); |
| 1478 | cpu68k_map_set(m68k_write16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); |
| 1479 | |
| 1480 | // SH2 |
| 1481 | sh2_read8_map[2].addr = sh2_read8_map[6].addr = |
| 1482 | sh2_read16_map[2].addr = sh2_read16_map[6].addr = MAP_MEMORY(Pico32xMem->dram[b]); |
| 1483 | |
| 1484 | sh2_write8_map[0x04/2] = sh2_write8_map[0x24/2] = b ? sh2_write8_dram1 : sh2_write8_dram0; |
| 1485 | sh2_write16_map[0x04/2] = sh2_write16_map[0x24/2] = b ? sh2_write16_dram1 : sh2_write16_dram0; |
| 1486 | } |
| 1487 | |
| 1488 | void PicoMemSetup32x(void) |
| 1489 | { |
| 1490 | unsigned int rs; |
| 1491 | int i; |
| 1492 | |
| 1493 | Pico32xMem = plat_mmap(0x06000000, sizeof(*Pico32xMem), 0, 0); |
| 1494 | if (Pico32xMem == NULL) { |
| 1495 | elprintf(EL_STATUS, "OOM"); |
| 1496 | return; |
| 1497 | } |
| 1498 | |
| 1499 | dmac0 = (void *)&Pico32xMem->sh2_peri_regs[0][0x180 / 4]; |
| 1500 | |
| 1501 | get_bios(); |
| 1502 | |
| 1503 | // cartridge area becomes unmapped |
| 1504 | // XXX: we take the easy way and don't unmap ROM, |
| 1505 | // so that we can avoid handling the RV bit. |
| 1506 | // m68k_map_unmap(0x000000, 0x3fffff); |
| 1507 | |
| 1508 | // MD ROM area |
| 1509 | rs = sizeof(Pico32xMem->m68k_rom_bank); |
| 1510 | cpu68k_map_set(m68k_read8_map, 0x000000, rs - 1, Pico32xMem->m68k_rom_bank, 0); |
| 1511 | cpu68k_map_set(m68k_read16_map, 0x000000, rs - 1, Pico32xMem->m68k_rom_bank, 0); |
| 1512 | cpu68k_map_set(m68k_write8_map, 0x000000, rs - 1, PicoWrite8_hint, 1); // TODO verify |
| 1513 | cpu68k_map_set(m68k_write16_map, 0x000000, rs - 1, PicoWrite16_hint, 1); |
| 1514 | |
| 1515 | // 32X ROM (unbanked, XXX: consider mirroring?) |
| 1516 | rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK; |
| 1517 | if (rs > 0x80000) |
| 1518 | rs = 0x80000; |
| 1519 | cpu68k_map_set(m68k_read8_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0); |
| 1520 | cpu68k_map_set(m68k_read16_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0); |
| 1521 | #ifdef EMU_F68K |
| 1522 | // setup FAME fetchmap |
| 1523 | PicoCpuFM68k.Fetch[0] = (unsigned long)Pico32xMem->m68k_rom; |
| 1524 | for (rs = 0x88; rs < 0x90; rs++) |
| 1525 | PicoCpuFM68k.Fetch[rs] = (unsigned long)Pico.rom - 0x880000; |
| 1526 | #endif |
| 1527 | |
| 1528 | // 32X ROM (banked) |
| 1529 | bank_switch(0); |
| 1530 | |
| 1531 | // SYS regs |
| 1532 | cpu68k_map_set(m68k_read8_map, 0xa10000, 0xa1ffff, PicoRead8_32x_on, 1); |
| 1533 | cpu68k_map_set(m68k_read16_map, 0xa10000, 0xa1ffff, PicoRead16_32x_on, 1); |
| 1534 | cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, PicoWrite8_32x_on, 1); |
| 1535 | cpu68k_map_set(m68k_write16_map, 0xa10000, 0xa1ffff, PicoWrite16_32x_on, 1); |
| 1536 | |
| 1537 | // SH2 maps: A31,A30,A29,CS1,CS0 |
| 1538 | // all unmapped by default |
| 1539 | for (i = 0; i < ARRAY_SIZE(sh2_read8_map); i++) { |
| 1540 | sh2_read8_map[i].addr = MAP_HANDLER(sh2_read8_unmapped); |
| 1541 | sh2_read16_map[i].addr = MAP_HANDLER(sh2_read16_unmapped); |
| 1542 | } |
| 1543 | |
| 1544 | for (i = 0; i < ARRAY_SIZE(sh2_write8_map); i++) { |
| 1545 | sh2_write8_map[i] = sh2_write8_unmapped; |
| 1546 | sh2_write16_map[i] = sh2_write16_unmapped; |
| 1547 | } |
| 1548 | |
| 1549 | // "purge area" |
| 1550 | for (i = 0x40; i <= 0x5f; i++) { |
| 1551 | sh2_write8_map[i >> 1] = |
| 1552 | sh2_write16_map[i >> 1] = sh2_write_ignore; |
| 1553 | } |
| 1554 | |
| 1555 | // CS0 |
| 1556 | sh2_read8_map[0].addr = sh2_read8_map[4].addr = MAP_HANDLER(sh2_read8_cs0); |
| 1557 | sh2_read16_map[0].addr = sh2_read16_map[4].addr = MAP_HANDLER(sh2_read16_cs0); |
| 1558 | sh2_write8_map[0x00/2] = sh2_write8_map[0x20/2] = sh2_write8_cs0; |
| 1559 | sh2_write16_map[0x00/2] = sh2_write16_map[0x20/2] = sh2_write16_cs0; |
| 1560 | // CS1 - ROM |
| 1561 | sh2_read8_map[1].addr = sh2_read8_map[5].addr = |
| 1562 | sh2_read16_map[1].addr = sh2_read16_map[5].addr = MAP_MEMORY(Pico.rom); |
| 1563 | sh2_read8_map[1].mask = sh2_read8_map[5].mask = |
| 1564 | sh2_read16_map[1].mask = sh2_read16_map[5].mask = 0x3fffff; // FIXME |
| 1565 | // CS2 - DRAM - done by Pico32xSwapDRAM() |
| 1566 | sh2_read8_map[2].mask = sh2_read8_map[6].mask = |
| 1567 | sh2_read16_map[2].mask = sh2_read16_map[6].mask = 0x01ffff; |
| 1568 | // CS3 - SDRAM |
| 1569 | sh2_read8_map[3].addr = sh2_read8_map[7].addr = |
| 1570 | sh2_read16_map[3].addr = sh2_read16_map[7].addr = MAP_MEMORY(Pico32xMem->sdram); |
| 1571 | sh2_write8_map[0x06/2] = sh2_write8_map[0x26/2] = sh2_write8_sdram; |
| 1572 | sh2_write16_map[0x06/2] = sh2_write16_map[0x26/2] = sh2_write16_sdram; |
| 1573 | sh2_read8_map[3].mask = sh2_read8_map[7].mask = |
| 1574 | sh2_read16_map[3].mask = sh2_read16_map[7].mask = 0x03ffff; |
| 1575 | // SH2 data array |
| 1576 | sh2_read8_map[0x18].addr = MAP_HANDLER(sh2_read8_da); |
| 1577 | sh2_read16_map[0x18].addr = MAP_HANDLER(sh2_read16_da); |
| 1578 | sh2_write8_map[0xc0/2] = sh2_write8_da; |
| 1579 | sh2_write16_map[0xc0/2] = sh2_write16_da; |
| 1580 | // SH2 IO |
| 1581 | sh2_read8_map[0x1f].addr = MAP_HANDLER(sh2_peripheral_read8); |
| 1582 | sh2_read16_map[0x1f].addr = MAP_HANDLER(sh2_peripheral_read16); |
| 1583 | sh2_write8_map[0xff/2] = sh2_peripheral_write8; |
| 1584 | sh2_write16_map[0xff/2] = sh2_peripheral_write16; |
| 1585 | |
| 1586 | // map DRAM area, both 68k and SH2 |
| 1587 | Pico32xSwapDRAM(1); |
| 1588 | |
| 1589 | msh2.read8_map = ssh2.read8_map = sh2_read8_map; |
| 1590 | msh2.read16_map = ssh2.read16_map = sh2_read16_map; |
| 1591 | msh2.write8_tab = ssh2.write8_tab = (const void **)(void *)sh2_write8_map; |
| 1592 | msh2.write16_tab = ssh2.write16_tab = (const void **)(void *)sh2_write16_map; |
| 1593 | |
| 1594 | // setup poll detector |
| 1595 | m68k_poll.flag = P32XF_68KPOLL; |
| 1596 | m68k_poll.cyc_max = 64; |
| 1597 | sh2_poll[0].flag = P32XF_MSH2POLL; |
| 1598 | sh2_poll[0].cyc_max = 21; |
| 1599 | sh2_poll[1].flag = P32XF_SSH2POLL; |
| 1600 | sh2_poll[1].cyc_max = 16; |
| 1601 | |
| 1602 | #ifdef DRC_SH2 |
| 1603 | sh2_drc_mem_setup(&msh2); |
| 1604 | sh2_drc_mem_setup(&ssh2); |
| 1605 | #endif |
| 1606 | } |
| 1607 | |
| 1608 | void Pico32xStateLoaded(void) |
| 1609 | { |
| 1610 | bank_switch(Pico32x.regs[4 / 2]); |
| 1611 | Pico32xSwapDRAM((Pico32x.vdp_regs[0x0a / 2] & P32XV_FS) ^ P32XV_FS); |
| 1612 | p32x_poll_event(3, 0); |
| 1613 | Pico32x.dirty_pal = 1; |
| 1614 | memset(Pico32xMem->pwm, 0, sizeof(Pico32xMem->pwm)); |
| 1615 | p32x_timers_recalc(); |
| 1616 | #ifdef DRC_SH2 |
| 1617 | sh2_drc_flush_all(); |
| 1618 | #endif |
| 1619 | } |
| 1620 | |
| 1621 | // vim:shiftwidth=2:ts=2:expandtab |