| 1 | // vim:shiftwidth=2:expandtab |
| 2 | #include <stdio.h> |
| 3 | #include <stdlib.h> |
| 4 | #include <string.h> |
| 5 | #include <alloca.h> |
| 6 | #include <sys/types.h> |
| 7 | #include <sys/stat.h> |
| 8 | #include <fcntl.h> |
| 9 | #include <sys/mman.h> |
| 10 | #include <sys/types.h> |
| 11 | #include <unistd.h> |
| 12 | #include <signal.h> |
| 13 | #include <asm/ucontext.h> |
| 14 | #include <pthread.h> |
| 15 | #include <errno.h> |
| 16 | #include <time.h> |
| 17 | #include <sys/resource.h> |
| 18 | #include <sys/ioctl.h> |
| 19 | #include <linux/soundcard.h> |
| 20 | #include <linux/fb.h> |
| 21 | |
| 22 | #include "header.h" |
| 23 | #include "../common/host_fb.h" |
| 24 | #include "../common/cmn.h" |
| 25 | #include "sys_cacheflush.h" |
| 26 | #include "realfuncs.h" |
| 27 | |
| 28 | #if (DBG & 2) && !(DBG & 4) |
| 29 | #define LOG_IO_UNK |
| 30 | #endif |
| 31 | #if (DBG & 4) |
| 32 | #define LOG_IO |
| 33 | #endif |
| 34 | //#define LOG_SEGV |
| 35 | |
| 36 | #ifdef LOG_IO |
| 37 | #define iolog log_io |
| 38 | #else |
| 39 | #define iolog(...) |
| 40 | #endif |
| 41 | |
| 42 | #ifdef LOG_IO_UNK |
| 43 | #define iolog_unh log_io |
| 44 | #else |
| 45 | #define iolog_unh(...) |
| 46 | #endif |
| 47 | |
| 48 | #ifdef LOG_SEGV |
| 49 | #define segvlog printf |
| 50 | #else |
| 51 | #define segvlog(...) |
| 52 | #endif |
| 53 | |
| 54 | #if defined(LOG_IO) || defined(LOG_IO_UNK) |
| 55 | #include "mmsp2-regs.h" |
| 56 | #endif |
| 57 | |
| 58 | typedef unsigned long long u64; |
| 59 | typedef unsigned int u32; |
| 60 | typedef unsigned short u16; |
| 61 | typedef unsigned char u8; |
| 62 | |
| 63 | static pthread_mutex_t fb_mutex = PTHREAD_MUTEX_INITIALIZER; |
| 64 | static pthread_cond_t fb_cond = PTHREAD_COND_INITIALIZER; |
| 65 | |
| 66 | static struct { |
| 67 | u32 dstctrl; |
| 68 | u32 dstaddr; |
| 69 | u32 dststride; |
| 70 | u32 srcctrl; |
| 71 | u32 srcaddr; // |
| 72 | u32 srcstride; |
| 73 | u32 srcforcolor; |
| 74 | u32 srcbackcolor; |
| 75 | u32 patctrl; // |
| 76 | u32 patforcolor; |
| 77 | u32 patbackcolor; |
| 78 | u32 size; |
| 79 | u32 ctrl; // |
| 80 | u32 run; |
| 81 | u32 intc; |
| 82 | u32 srcfifo; |
| 83 | } blitter; |
| 84 | |
| 85 | #define SRCCTRL_INVIDEO (1 << 8) |
| 86 | #define SRCCTRL_SRCENB (1 << 7) |
| 87 | #define CTRL_TRANSPARENCYENB (1 << 11) |
| 88 | |
| 89 | static struct { |
| 90 | u16 mlc_stl_cntl; |
| 91 | union { |
| 92 | u32 mlc_stl_adr; |
| 93 | struct { |
| 94 | u16 mlc_stl_adrl; |
| 95 | u16 mlc_stl_adrh; |
| 96 | }; |
| 97 | }; |
| 98 | u16 mlc_stl_pallt_a; |
| 99 | union { |
| 100 | u16 mlc_stl_pallt_d[256*2]; |
| 101 | u32 mlc_stl_pallt_d32[256]; |
| 102 | }; |
| 103 | |
| 104 | // state |
| 105 | void *umem; |
| 106 | u32 old_mlc_stl_adr; |
| 107 | u32 btn_state; // as seen through /dev/GPIO |
| 108 | u32 dirty_pal:1; |
| 109 | } mmsp2; |
| 110 | |
| 111 | |
| 112 | #if defined(LOG_IO) || defined(LOG_IO_UNK) |
| 113 | static void log_io(const char *pfx, u32 a, u32 d, int size) |
| 114 | { |
| 115 | const char *fmt, *reg = ""; |
| 116 | switch (size) { |
| 117 | case 8: fmt = "%s %08x %02x %s\n"; d &= 0xff; break; |
| 118 | case 32: fmt = "%s %08x %08x %s\n"; break; |
| 119 | default: fmt = "%s %08x %04x %s\n"; d &= 0xffff; break; |
| 120 | } |
| 121 | |
| 122 | if ((a & ~0xffff) == 0x7f000000) |
| 123 | reg = regnames[a & 0xffff]; |
| 124 | |
| 125 | printf(fmt, pfx, a, d, reg); |
| 126 | } |
| 127 | #endif |
| 128 | |
| 129 | static void memset16(void *dst, u32 pattern, int count) |
| 130 | { |
| 131 | u32 *dl; |
| 132 | u16 *d; |
| 133 | |
| 134 | d = (u16 *)((long)dst & ~1); |
| 135 | if ((long)d & 2) { |
| 136 | *d++ = pattern; |
| 137 | count--; |
| 138 | } |
| 139 | dl = (void *)d; |
| 140 | pattern |= pattern << 16; |
| 141 | |
| 142 | while (count >= 2) { |
| 143 | *dl++ = pattern; |
| 144 | count -= 2; |
| 145 | } |
| 146 | if (count) |
| 147 | *(u16 *)dl = pattern; |
| 148 | } |
| 149 | |
| 150 | static void blt_tr(void *dst, void *src, u32 trc, int w) |
| 151 | { |
| 152 | u16 *d = (u16 *)((long)dst & ~1); |
| 153 | u16 *s = (u16 *)((long)src & ~1); |
| 154 | |
| 155 | // XXX: optimize |
| 156 | for (; w > 0; d++, s++, w--) |
| 157 | if (*s != trc) |
| 158 | *d = *s; |
| 159 | } |
| 160 | |
| 161 | #define dump_blitter() \ |
| 162 | { \ |
| 163 | u32 *r = &blitter.dstctrl; \ |
| 164 | int i; \ |
| 165 | for (i = 0; i < 4*4; i++, r++) { \ |
| 166 | printf("%08x ", *r); \ |
| 167 | if ((i & 3) == 3) \ |
| 168 | printf("\n"); \ |
| 169 | } \ |
| 170 | } |
| 171 | |
| 172 | static void *uppermem_lookup(u32 addr, u8 **mem_end) |
| 173 | { |
| 174 | // XXX: maybe support mirroring? |
| 175 | if ((addr & 0xfe000000) != 0x02000000) |
| 176 | return NULL; |
| 177 | |
| 178 | *mem_end = (u8 *)mmsp2.umem + 0x02000000; |
| 179 | return (u8 *)mmsp2.umem - 0x02000000 + addr; |
| 180 | } |
| 181 | |
| 182 | static void blitter_do(void) |
| 183 | { |
| 184 | u8 *dst, *dste, *src = NULL, *srce = NULL; |
| 185 | int w, h, sstrd, dstrd; |
| 186 | int to_screen = 0; |
| 187 | u32 bpp, addr; |
| 188 | |
| 189 | w = blitter.size & 0x7ff; |
| 190 | h = (blitter.size >> 16) & 0x7ff; |
| 191 | sstrd = blitter.srcstride; |
| 192 | dstrd = blitter.dststride; |
| 193 | |
| 194 | // XXX: need to confirm this.. |
| 195 | addr = (blitter.dstaddr & ~3) | ((blitter.dstctrl & 0x1f) >> 3); |
| 196 | |
| 197 | // use dst bpp.. How does it do blits with different src bpp? |
| 198 | bpp = (blitter.dstctrl & 0x20) ? 16 : 8; |
| 199 | |
| 200 | // maybe the screen? |
| 201 | if (((w == 320 && h == 240) || // blit whole screen |
| 202 | (w * h >= 320*240/2)) && // ..or at least half of the area |
| 203 | mmsp2.mlc_stl_adr <= addr && addr < mmsp2.mlc_stl_adr + 320*240*2) |
| 204 | to_screen = 1; |
| 205 | |
| 206 | dst = uppermem_lookup(addr, &dste); |
| 207 | |
| 208 | // XXX: assume fill if no SRCENB, but it could be pattern blit.. |
| 209 | if (blitter.srcctrl & SRCCTRL_SRCENB) { |
| 210 | if (!(blitter.srcctrl & SRCCTRL_INVIDEO)) |
| 211 | goto bad_blit; |
| 212 | |
| 213 | addr = (blitter.srcaddr & ~3) | ((blitter.srcctrl & 0x1f) >> 3); |
| 214 | src = uppermem_lookup(addr, &srce); |
| 215 | if (src == NULL) |
| 216 | goto bad_blit; |
| 217 | |
| 218 | if (src + sstrd * h > srce) { |
| 219 | err("blit %08x->%08x %dx%d did not fit src\n", |
| 220 | blitter.srcaddr, blitter.dstaddr, w, h); |
| 221 | h = (srce - src) / sstrd; |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | if (dst == NULL) |
| 226 | goto bad_blit; |
| 227 | |
| 228 | if (dst + dstrd * h > dste) { |
| 229 | err("blit %08x->%08x %dx%d did not fit dst\n", |
| 230 | blitter.srcaddr, blitter.dstaddr, w, h); |
| 231 | h = (dste - dst) / dstrd; |
| 232 | } |
| 233 | |
| 234 | if (src != NULL) { |
| 235 | // copy |
| 236 | if (bpp == 16 && (blitter.ctrl & CTRL_TRANSPARENCYENB)) { |
| 237 | u32 trc = blitter.ctrl >> 16; |
| 238 | for (; h > 0; h--, dst += dstrd, src += sstrd) |
| 239 | blt_tr(dst, src, trc, w); |
| 240 | } |
| 241 | else { |
| 242 | for (; h > 0; h--, dst += dstrd, src += sstrd) |
| 243 | memcpy(dst, src, w * bpp / 8); |
| 244 | } |
| 245 | } |
| 246 | else { |
| 247 | // fill. Assume the pattern is cleared and bg color is used |
| 248 | u32 bgc = blitter.patbackcolor & 0xffff; |
| 249 | if (bpp == 16) { |
| 250 | for (; h > 0; h--, dst += dstrd) |
| 251 | memset16(dst, bgc, w); |
| 252 | } |
| 253 | else { |
| 254 | for (; h > 0; h--, dst += dstrd) |
| 255 | memset(dst, bgc, w); // bgc? |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | if (to_screen) |
| 260 | pthread_cond_signal(&fb_cond); |
| 261 | return; |
| 262 | |
| 263 | bad_blit: |
| 264 | err("blit %08x->%08x %dx%d translated to %p->%p\n", |
| 265 | blitter.srcaddr, blitter.dstaddr, w, h, src, dst); |
| 266 | dump_blitter(); |
| 267 | } |
| 268 | |
| 269 | // FIXME: pass real dimensions to blitters |
| 270 | static void mlc_flip(void *src, int bpp) |
| 271 | { |
| 272 | static int old_bpp; |
| 273 | |
| 274 | // only pass pal to host if it's dirty |
| 275 | if (bpp <= 8 && mmsp2.dirty_pal) { |
| 276 | host_video_update_pal(mmsp2.mlc_stl_pallt_d32); |
| 277 | mmsp2.dirty_pal = 0; |
| 278 | } |
| 279 | |
| 280 | if (bpp != old_bpp) { |
| 281 | host_video_change_bpp(bpp); |
| 282 | old_bpp = bpp; |
| 283 | } |
| 284 | |
| 285 | switch (bpp) { |
| 286 | case 4: |
| 287 | host_video_blit4(src, 320, 240); |
| 288 | break; |
| 289 | |
| 290 | case 8: |
| 291 | host_video_blit8(src, 320, 240); |
| 292 | break; |
| 293 | |
| 294 | case 16: |
| 295 | host_video_blit16(src, 320, 240); |
| 296 | break; |
| 297 | |
| 298 | case 24: |
| 299 | // TODO |
| 300 | break; |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | #define ts_add_nsec(ts, ns) { \ |
| 305 | ts.tv_nsec += ns; \ |
| 306 | if (ts.tv_nsec >= 1000000000) { \ |
| 307 | ts.tv_sec++; \ |
| 308 | ts.tv_nsec -= 1000000000; \ |
| 309 | } \ |
| 310 | } |
| 311 | |
| 312 | static int fb_sync_thread_paused; |
| 313 | |
| 314 | static void *fb_sync_thread(void *arg) |
| 315 | { |
| 316 | int invalid_fb_addr = 1; |
| 317 | int manual_refresh = 0; |
| 318 | struct timespec ts; |
| 319 | int ret, wait_ret; |
| 320 | |
| 321 | //ret = pthread_setschedprio(pthread_self(), -1); |
| 322 | //log("pthread_setschedprio %d\n", ret); |
| 323 | //ret = setpriority(PRIO_PROCESS, 0, -1); |
| 324 | //log("setpriority %d\n", ret); |
| 325 | |
| 326 | ret = clock_gettime(CLOCK_REALTIME, &ts); |
| 327 | if (ret != 0) { |
| 328 | perror(PFX "clock_gettime"); |
| 329 | exit(1); |
| 330 | } |
| 331 | |
| 332 | while (1) { |
| 333 | u8 *gp2x_fb, *gp2x_fb_end; |
| 334 | int mode, bpp; |
| 335 | |
| 336 | ret = pthread_mutex_lock(&fb_mutex); |
| 337 | wait_ret = pthread_cond_timedwait(&fb_cond, &fb_mutex, &ts); |
| 338 | ret |= pthread_mutex_unlock(&fb_mutex); |
| 339 | |
| 340 | if (ret != 0) { |
| 341 | err("fb_thread: mutex error: %d\n", ret); |
| 342 | sleep(1); |
| 343 | continue; |
| 344 | } |
| 345 | if (wait_ret != 0 && wait_ret != ETIMEDOUT) { |
| 346 | err("fb_thread: cond error: %d\n", wait_ret); |
| 347 | sleep(1); |
| 348 | continue; |
| 349 | } |
| 350 | if (fb_sync_thread_paused) { |
| 351 | ts_add_nsec(ts, 100000000); |
| 352 | continue; |
| 353 | } |
| 354 | |
| 355 | if (wait_ret != ETIMEDOUT) { |
| 356 | clock_gettime(CLOCK_REALTIME, &ts); |
| 357 | ts_add_nsec(ts, 50000000); |
| 358 | manual_refresh++; |
| 359 | if (manual_refresh == 2) |
| 360 | dbg("fb_thread: switch to manual refresh\n"); |
| 361 | } else { |
| 362 | ts_add_nsec(ts, 16666667); |
| 363 | if (manual_refresh > 1) |
| 364 | dbg("fb_thread: switch to auto refresh\n"); |
| 365 | manual_refresh = 0; |
| 366 | } |
| 367 | |
| 368 | mode = (mmsp2.mlc_stl_cntl >> 9) & 3; |
| 369 | bpp = mode ? mode * 8 : 4; |
| 370 | |
| 371 | gp2x_fb = uppermem_lookup(mmsp2.mlc_stl_adr, &gp2x_fb_end); |
| 372 | if (gp2x_fb == NULL || gp2x_fb + 320*240 * bpp / 8 > gp2x_fb_end) { |
| 373 | if (!invalid_fb_addr) { |
| 374 | err("fb_thread: %08x is out of range\n", mmsp2.mlc_stl_adr); |
| 375 | invalid_fb_addr = 1; |
| 376 | } |
| 377 | continue; |
| 378 | } |
| 379 | |
| 380 | mlc_flip(gp2x_fb, bpp); |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | static void fb_thread_pause(void) |
| 385 | { |
| 386 | fb_sync_thread_paused = 1; |
| 387 | // wait until it finishes last refresh |
| 388 | // that it might be doing now |
| 389 | usleep(10000); |
| 390 | } |
| 391 | |
| 392 | static void fb_thread_resume(void) |
| 393 | { |
| 394 | fb_sync_thread_paused = 0; |
| 395 | } |
| 396 | |
| 397 | static u32 xread8(u32 a) |
| 398 | { |
| 399 | iolog("r8 ", a, 0, 8); |
| 400 | iolog_unh("r8 ", a, 0, 8); |
| 401 | return 0; |
| 402 | } |
| 403 | |
| 404 | static u32 xread16(u32 a) |
| 405 | { |
| 406 | static u32 fudge, old_a; |
| 407 | u32 d = 0, t; |
| 408 | |
| 409 | if ((a & 0xffff0000) == 0x7f000000) { |
| 410 | u32 a_ = a & 0xffff; |
| 411 | switch (a_) { |
| 412 | case 0x0910: // FPLL |
| 413 | case 0x0912: |
| 414 | d = 0x9407; |
| 415 | break; |
| 416 | // minilib reads as: |
| 417 | // 0000 P000 VuVd00 0000 YXBA RLSeSt 0R0D 0L0U |
| 418 | // | GPIOD |GPIOC[8:15]|GPIOM[0:7]| |
| 419 | // /dev/GPIO: |
| 420 | // ... 0PVdVu ... |
| 421 | case 0x1184: // GPIOC |
| 422 | d = ~mmsp2.btn_state & 0xff00; |
| 423 | d |= 0x00ff; |
| 424 | break; |
| 425 | case 0x1186: // GPIOD |
| 426 | t = ~mmsp2.btn_state; |
| 427 | d = (t >> 9) & 0x0080; |
| 428 | d |= (t >> 11) & 0x0040; |
| 429 | d |= (t >> 7) & 0x0800; |
| 430 | d |= 0x373b; |
| 431 | break; |
| 432 | case 0x1198: // GPIOM |
| 433 | mmsp2.btn_state = host_read_btns(); |
| 434 | d = ~mmsp2.btn_state & 0xff; |
| 435 | d |= 0x01aa; |
| 436 | break; |
| 437 | case 0x1836: // reserved |
| 438 | d = 0x2330; |
| 439 | break; |
| 440 | case 0x2816: // DPC_X_MAX |
| 441 | d = 319; |
| 442 | break; |
| 443 | case 0x2818: // DPC_Y_MAX |
| 444 | d = 239; |
| 445 | break; |
| 446 | case 0x28da: |
| 447 | d = mmsp2.mlc_stl_cntl; |
| 448 | break; |
| 449 | case 0x290e: |
| 450 | case 0x2912: |
| 451 | d = mmsp2.mlc_stl_adrl; |
| 452 | break; |
| 453 | case 0x2910: |
| 454 | case 0x2914: |
| 455 | d = mmsp2.mlc_stl_adrh; |
| 456 | break; |
| 457 | case 0x2958: |
| 458 | d = mmsp2.mlc_stl_pallt_a; |
| 459 | break; |
| 460 | default: |
| 461 | goto unh; |
| 462 | } |
| 463 | goto out; |
| 464 | } |
| 465 | |
| 466 | unh: |
| 467 | if (a == old_a) { |
| 468 | d = fudge; |
| 469 | fudge = ~fudge; |
| 470 | } |
| 471 | old_a = a; |
| 472 | iolog_unh("r16", a, d & 0xffff, 16); |
| 473 | |
| 474 | out: |
| 475 | d &= 0xffff; |
| 476 | iolog("r16", a, d, 16); |
| 477 | return d; |
| 478 | } |
| 479 | |
| 480 | static u32 xread32(u32 a) |
| 481 | { |
| 482 | u32 d = 0; |
| 483 | if ((a & 0xfff00000) == 0x7f000000) { |
| 484 | u32 a_ = a & 0xffff; |
| 485 | struct timespec ts; |
| 486 | u64 t64; |
| 487 | |
| 488 | switch (a_) { |
| 489 | case 0x0a00: // TCOUNT, 1/7372800s |
| 490 | clock_gettime(CLOCK_REALTIME, &ts); |
| 491 | t64 = (u64)ts.tv_sec * 1000000000 + ts.tv_nsec; |
| 492 | // t * 7372800.0 / 1000000000 * 0x100000000 ~= t * 31665935 |
| 493 | t64 *= 31665935; |
| 494 | d = t64 >> 32; |
| 495 | break; |
| 496 | } |
| 497 | } |
| 498 | if ((a & 0xfff00000) == 0x7f100000) { |
| 499 | u32 *bl = &blitter.dstctrl; |
| 500 | u32 a_ = a & 0xfff; |
| 501 | if (a_ < 0x40) { |
| 502 | d = bl[a_ / 4]; |
| 503 | if (a_ == 0x34) |
| 504 | d = 0; // not busy |
| 505 | goto out; |
| 506 | } |
| 507 | } |
| 508 | iolog_unh("r32", a, d, 32); |
| 509 | |
| 510 | out: |
| 511 | iolog("r32", a, d, 32); |
| 512 | return d; |
| 513 | } |
| 514 | |
| 515 | static void xwrite8(u32 a, u32 d) |
| 516 | { |
| 517 | iolog("w8 ", a, d, 8); |
| 518 | iolog_unh("w8 ", a, d, 8); |
| 519 | } |
| 520 | |
| 521 | static void xwrite16(u32 a, u32 d) |
| 522 | { |
| 523 | iolog("w16", a, d, 16); |
| 524 | if ((a & 0xfff00000) == 0x7f000000) { |
| 525 | u32 a_ = a & 0xffff; |
| 526 | switch (a_) { |
| 527 | case 0x28da: |
| 528 | mmsp2.mlc_stl_cntl = d | 0xaa; |
| 529 | break; |
| 530 | case 0x290e: |
| 531 | case 0x2910: |
| 532 | // odd addresses don't affect LCD. What about TV? |
| 533 | return; |
| 534 | case 0x2912: |
| 535 | mmsp2.mlc_stl_adrl = d; |
| 536 | return; |
| 537 | case 0x2914: |
| 538 | mmsp2.mlc_stl_adrh = d; |
| 539 | if (mmsp2.mlc_stl_adr != mmsp2.old_mlc_stl_adr) |
| 540 | // ask for refresh |
| 541 | pthread_cond_signal(&fb_cond); |
| 542 | mmsp2.old_mlc_stl_adr = mmsp2.mlc_stl_adr; |
| 543 | return; |
| 544 | case 0x2958: |
| 545 | mmsp2.mlc_stl_pallt_a = d & 0x1ff; |
| 546 | return; |
| 547 | case 0x295a: |
| 548 | mmsp2.mlc_stl_pallt_d[mmsp2.mlc_stl_pallt_a++] = d; |
| 549 | mmsp2.mlc_stl_pallt_a &= 0x1ff; |
| 550 | mmsp2.dirty_pal = 1; |
| 551 | return; |
| 552 | } |
| 553 | } |
| 554 | iolog_unh("w16", a, d, 16); |
| 555 | } |
| 556 | |
| 557 | static void xwrite32(u32 a, u32 d) |
| 558 | { |
| 559 | iolog("w32", a, d, 32); |
| 560 | |
| 561 | if ((a & 0xfff00000) == 0x7f100000) { |
| 562 | u32 *bl = &blitter.dstctrl; |
| 563 | u32 a_ = a & 0xfff; |
| 564 | if (a_ < 0x40) { |
| 565 | bl[a_ / 4] = d; |
| 566 | if (a_ == 0x34 && (d & 1)) |
| 567 | blitter_do(); |
| 568 | return; |
| 569 | } |
| 570 | } |
| 571 | iolog_unh("w32", a, d, 32); |
| 572 | } |
| 573 | |
| 574 | #define LINKPAGE_SIZE 0x1000 |
| 575 | #define LINKPAGE_COUNT 4 |
| 576 | #define LINKPAGE_ALLOC (LINKPAGE_SIZE * LINKPAGE_COUNT) |
| 577 | |
| 578 | struct op_context { |
| 579 | u32 pc; |
| 580 | u32 op; |
| 581 | u32 code[0]; |
| 582 | }; |
| 583 | |
| 584 | struct op_linkpage { |
| 585 | void (*handler)(struct op_context *op_ctx); |
| 586 | u32 code[0]; |
| 587 | }; |
| 588 | |
| 589 | struct op_stackframe { |
| 590 | u32 saved_regs[15]; |
| 591 | u32 cpsr; |
| 592 | }; |
| 593 | |
| 594 | static struct op_linkpage *g_linkpage; |
| 595 | static u32 *g_code_ptr; |
| 596 | static int g_linkpage_count; |
| 597 | |
| 598 | #define BIT_SET(v, b) (v & (1 << (b))) |
| 599 | |
| 600 | void emu_handle_op(struct op_context *op_ctx, struct op_stackframe *sframe) |
| 601 | { |
| 602 | u32 *regs = sframe->saved_regs; |
| 603 | u32 op = op_ctx->op; |
| 604 | u32 t, shift, ret, addr; |
| 605 | int rn, rd; |
| 606 | |
| 607 | rd = (op & 0x0000f000) >> 12; |
| 608 | rn = (op & 0x000f0000) >> 16; |
| 609 | |
| 610 | if ((op & 0x0f200090) == 0x01000090) { // AM3: LDRH, STRH |
| 611 | if (!BIT_SET(op, 5)) // !H |
| 612 | goto unhandled; |
| 613 | if (BIT_SET(op, 6) && !BIT_SET(op, 20)) // S && !L |
| 614 | goto unhandled; |
| 615 | |
| 616 | if (BIT_SET(op, 22)) // imm offset |
| 617 | t = ((op & 0xf00) >> 4) | (op & 0x0f); |
| 618 | else // reg offset |
| 619 | t = regs[op & 0x000f]; |
| 620 | |
| 621 | if (!BIT_SET(op, 23)) |
| 622 | t = -t; |
| 623 | addr = regs[rn] + t; |
| 624 | |
| 625 | if (BIT_SET(op, 20)) { // Load |
| 626 | ret = xread16(addr); |
| 627 | if (BIT_SET(op, 6)) { // S |
| 628 | ret <<= 16; |
| 629 | ret = (signed int)ret >> 16; |
| 630 | } |
| 631 | regs[rd] = ret; |
| 632 | } |
| 633 | else |
| 634 | xwrite16(addr, regs[rd]); |
| 635 | } |
| 636 | else if ((op & 0x0d200000) == 0x05000000) { // AM2: LDR[B], STR[B] |
| 637 | if (BIT_SET(op, 25)) { // reg offs |
| 638 | if (BIT_SET(op, 4)) |
| 639 | goto unhandled; |
| 640 | |
| 641 | t = regs[op & 0x000f]; |
| 642 | shift = (op & 0x0f80) >> 7; |
| 643 | switch ((op & 0x0060) >> 5) { |
| 644 | case 0: t = t << shift; break; |
| 645 | case 1: t = t >> (shift + 1); break; |
| 646 | case 2: t = (signed int)t >> (shift + 1); break; |
| 647 | case 3: goto unhandled; // I'm just lazy |
| 648 | } |
| 649 | } |
| 650 | else // imm offs |
| 651 | t = op & 0x0fff; |
| 652 | |
| 653 | if (!BIT_SET(op, 23)) |
| 654 | t = -t; |
| 655 | addr = regs[rn] + t; |
| 656 | |
| 657 | if (BIT_SET(op, 20)) { // Load |
| 658 | if (BIT_SET(op, 22)) // Byte |
| 659 | ret = xread8(addr); |
| 660 | else |
| 661 | ret = xread32(addr); |
| 662 | regs[rd] = ret; |
| 663 | } |
| 664 | else { |
| 665 | if (BIT_SET(op, 22)) // Byte |
| 666 | xwrite8(addr, regs[rd]); |
| 667 | else |
| 668 | xwrite32(addr, regs[rd]); |
| 669 | } |
| 670 | } |
| 671 | else |
| 672 | goto unhandled; |
| 673 | |
| 674 | #if 0 |
| 675 | if (addr != addr_check) { |
| 676 | fprintf(stderr, "bad calculated addr: %08x vs %08x\n", addr, addr_check); |
| 677 | abort(); |
| 678 | } |
| 679 | #endif |
| 680 | return; |
| 681 | |
| 682 | unhandled: |
| 683 | err("unhandled IO op %08x @ %08x\n", op, op_ctx->pc); |
| 684 | } |
| 685 | |
| 686 | static u32 make_offset12(u32 *pc, u32 *target) |
| 687 | { |
| 688 | int lp_offs, u = 1; |
| 689 | |
| 690 | lp_offs = (char *)target - (char *)pc - 2*4; |
| 691 | if (lp_offs < 0) { |
| 692 | lp_offs = -lp_offs; |
| 693 | u = 0; |
| 694 | } |
| 695 | if (lp_offs >= LINKPAGE_SIZE) { |
| 696 | err("linkpage too far: %d\n", lp_offs); |
| 697 | abort(); |
| 698 | } |
| 699 | |
| 700 | return (u << 23) | lp_offs; |
| 701 | } |
| 702 | |
| 703 | static u32 make_jmp(u32 *pc, u32 *target, int bl) |
| 704 | { |
| 705 | int jmp_val; |
| 706 | |
| 707 | jmp_val = target - pc - 2; |
| 708 | if (jmp_val < (int)0xff000000 || jmp_val > 0x00ffffff) { |
| 709 | err("jump out of range (%p -> %p)\n", pc, target); |
| 710 | abort(); |
| 711 | } |
| 712 | |
| 713 | return 0xea000000 | (bl << 24) | (jmp_val & 0x00ffffff); |
| 714 | } |
| 715 | |
| 716 | static void emit_op(u32 op) |
| 717 | { |
| 718 | *g_code_ptr++ = op; |
| 719 | } |
| 720 | |
| 721 | static void emit_op_io(u32 op, u32 *target) |
| 722 | { |
| 723 | op |= make_offset12(g_code_ptr, target); |
| 724 | emit_op(op); |
| 725 | } |
| 726 | |
| 727 | static void init_linkpage(void) |
| 728 | { |
| 729 | g_linkpage->handler = emu_call_handle_op; |
| 730 | g_code_ptr = g_linkpage->code; |
| 731 | } |
| 732 | |
| 733 | static void segv_sigaction(int num, siginfo_t *info, void *ctx) |
| 734 | { |
| 735 | struct ucontext *context = ctx; |
| 736 | u32 *regs = (u32 *)&context->uc_mcontext.arm_r0; |
| 737 | u32 *pc = (u32 *)regs[15]; |
| 738 | struct op_context *op_ctx; |
| 739 | int i, lp_size; |
| 740 | |
| 741 | if (((regs[15] ^ (u32)&segv_sigaction) & 0xff000000) == 0 || // PC is in our segment or |
| 742 | (((regs[15] ^ (u32)g_linkpage) & ~(LINKPAGE_ALLOC - 1)) == 0) || // .. in linkpage |
| 743 | ((long)info->si_addr & 0xffe00000) != 0x7f000000) // faulting not where expected |
| 744 | { |
| 745 | // real crash - time to die |
| 746 | err("segv %d %p @ %08x\n", info->si_code, info->si_addr, regs[15]); |
| 747 | for (i = 0; i < 8; i++) |
| 748 | dbg(" r%d=%08x r%2d=%08x\n", i, regs[i], i+8, regs[i+8]); |
| 749 | signal(num, SIG_DFL); |
| 750 | raise(num); |
| 751 | return; |
| 752 | } |
| 753 | segvlog("segv %d %p @ %08x\n", info->si_code, info->si_addr, regs[15]); |
| 754 | |
| 755 | // spit PC and op |
| 756 | op_ctx = (void *)g_code_ptr; |
| 757 | op_ctx->pc = (u32)pc; |
| 758 | op_ctx->op = *pc; |
| 759 | g_code_ptr = &op_ctx->code[0]; |
| 760 | |
| 761 | // emit jump to code ptr |
| 762 | *pc = make_jmp(pc, g_code_ptr, 0); |
| 763 | |
| 764 | // generate code: |
| 765 | emit_op (0xe50d0000 + 0xf00 - 4 * 0); // str r0, [sp, #(-0xf00 + r0_offs)] |
| 766 | emit_op (0xe50de000 + 0xf00 - 4 * 14); // str lr, [sp, #(-0xf00 + lr_offs)] |
| 767 | emit_op (0xe24f0000 + (g_code_ptr - (u32 *)op_ctx + 2) * 4); // sub r0, pc, #op_ctx |
| 768 | emit_op (0xe1a0e00f); // mov lr, pc |
| 769 | emit_op_io(0xe51ff000, (u32 *)&g_linkpage->handler); // ldr pc, =handle_op |
| 770 | emit_op (0xe51de000 + 0xf00 - 4 * 14); // ldr lr, [sp, #(-0xf00 + lr_offs)] |
| 771 | emit_op (make_jmp(g_code_ptr, pc + 1, 0)); // jmp <back> |
| 772 | |
| 773 | // sync caches |
| 774 | sys_cacheflush(pc, pc + 1); |
| 775 | sys_cacheflush(g_linkpage, g_code_ptr); |
| 776 | |
| 777 | lp_size = (char *)g_code_ptr - (char *)g_linkpage; |
| 778 | segvlog("code #%d %d/%d\n", g_linkpage_count, lp_size, LINKPAGE_SIZE); |
| 779 | |
| 780 | if (lp_size + 13*4 > LINKPAGE_SIZE) { |
| 781 | g_linkpage_count++; |
| 782 | if (g_linkpage_count >= LINKPAGE_COUNT) { |
| 783 | err("too many linkpages needed\n"); |
| 784 | abort(); |
| 785 | } |
| 786 | g_linkpage = (void *)((char *)g_linkpage + LINKPAGE_SIZE); |
| 787 | init_linkpage(); |
| 788 | } |
| 789 | //handle_op(regs[15], op, regs, (u32)info->si_addr); |
| 790 | //regs[15] += 4; |
| 791 | } |
| 792 | |
| 793 | void emu_init(void *map_bottom) |
| 794 | { |
| 795 | sigaction_t segv_action = { |
| 796 | .sa_sigaction = segv_sigaction, |
| 797 | .sa_flags = SA_SIGINFO, |
| 798 | }; |
| 799 | pthread_t tid; |
| 800 | void *pret; |
| 801 | int ret; |
| 802 | |
| 803 | g_linkpage = (void *)(((u32)map_bottom - LINKPAGE_ALLOC) & ~0xfff); |
| 804 | pret = mmap(g_linkpage, LINKPAGE_ALLOC, PROT_READ|PROT_WRITE, |
| 805 | MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, -1, 0); |
| 806 | if (pret != g_linkpage) { |
| 807 | perror(PFX "mmap linkpage"); |
| 808 | exit(1); |
| 809 | } |
| 810 | log("linkpages @ %p\n", g_linkpage); |
| 811 | init_linkpage(); |
| 812 | |
| 813 | // host stuff |
| 814 | ret = host_init(); |
| 815 | if (ret != 0) { |
| 816 | err("can't init host\n"); |
| 817 | exit(1); |
| 818 | } |
| 819 | |
| 820 | ret = host_video_init(NULL, 0); |
| 821 | if (ret != 0) { |
| 822 | err("can't init host video\n"); |
| 823 | exit(1); |
| 824 | } |
| 825 | |
| 826 | #ifdef WIZ |
| 827 | // we are short on memmory on Wiz, need special handling |
| 828 | extern void *host_mmap_upper(void); |
| 829 | mmsp2.umem = host_mmap_upper(); |
| 830 | #else |
| 831 | mmsp2.umem = mmap(NULL, 0x2000000, PROT_READ|PROT_WRITE|PROT_EXEC, |
| 832 | MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); |
| 833 | #endif |
| 834 | if (mmsp2.umem == MAP_FAILED) { |
| 835 | perror(PFX "mmap upper mem"); |
| 836 | exit(1); |
| 837 | } |
| 838 | |
| 839 | ret = pthread_create(&tid, NULL, fb_sync_thread, NULL); |
| 840 | if (ret != 0) { |
| 841 | err("failed to create fb_sync_thread: %d\n", ret); |
| 842 | exit(1); |
| 843 | } |
| 844 | pthread_detach(tid); |
| 845 | |
| 846 | // mmsp2 defaults |
| 847 | mmsp2.mlc_stl_adr = 0x03101000; // fb2 is at 0x03381000 |
| 848 | mmsp2.mlc_stl_cntl = 0x4ab; // 16bpp, region 1 active |
| 849 | |
| 850 | sigemptyset(&segv_action.sa_mask); |
| 851 | sigaction(SIGSEGV, &segv_action, NULL); |
| 852 | } |
| 853 | |
| 854 | int emu_read_gpiodev(void *buf, int count) |
| 855 | { |
| 856 | if (count <= 0) { |
| 857 | err("gpiodev read %d?\n", count); |
| 858 | return -1; |
| 859 | } |
| 860 | if (count > 4) |
| 861 | count = 4; |
| 862 | |
| 863 | mmsp2.btn_state = host_read_btns(); |
| 864 | memcpy(buf, &mmsp2.btn_state, count); |
| 865 | return count; |
| 866 | } |
| 867 | |
| 868 | struct dev_fd_t emu_interesting_fds[] = { |
| 869 | [IFD_SOUND] = { "/dev/dsp", -1 }, |
| 870 | { NULL, 0 }, |
| 871 | }; |
| 872 | |
| 873 | static void *emu_mmap_dev(unsigned int length, int prot, int flags, unsigned int offset) |
| 874 | { |
| 875 | u8 *umem, *umem_end; |
| 876 | |
| 877 | // SoC regs |
| 878 | if ((offset & ~0xffff) == 0xc0000000) { |
| 879 | return mmap((void *)0x7f000000, length, PROT_NONE, |
| 880 | MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_NORESERVE, -1, 0); |
| 881 | } |
| 882 | // blitter |
| 883 | if ((offset & ~0xffff) == 0xe0020000) { |
| 884 | return mmap((void *)0x7f100000, length, PROT_NONE, |
| 885 | MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_NORESERVE, -1, 0); |
| 886 | } |
| 887 | // upper mem |
| 888 | if ((offset & 0xfe000000) != 0x02000000) { |
| 889 | err("unexpected devmem mmap @ %08x\n", offset); |
| 890 | errno = EINVAL; |
| 891 | return MAP_FAILED; |
| 892 | } |
| 893 | |
| 894 | umem = uppermem_lookup(offset, &umem_end); |
| 895 | if (umem + length > umem_end) |
| 896 | err("warning: uppermem @ %08x overflows by %d bytes\n", |
| 897 | offset, umem + length - umem_end); |
| 898 | |
| 899 | dbg("upper mem @ %08x %d\n", offset, length); |
| 900 | return umem; |
| 901 | } |
| 902 | |
| 903 | void *emu_do_mmap(unsigned int length, int prot, int flags, int fd, unsigned int offset) |
| 904 | { |
| 905 | if (fd == FAKEDEV_MEM) |
| 906 | return emu_mmap_dev(length, prot, flags, offset); |
| 907 | |
| 908 | if (fd == FAKEDEV_FB0) |
| 909 | return emu_mmap_dev(length, prot, flags, offset + 0x03101000); |
| 910 | |
| 911 | if (fd == FAKEDEV_FB1) |
| 912 | return emu_mmap_dev(length, prot, flags, offset + 0x03381000); |
| 913 | |
| 914 | err("bad/ni mmap(?, %d, %x, %x, %d, %08x)\n", length, prot, flags, fd, offset); |
| 915 | errno = EINVAL; |
| 916 | return MAP_FAILED; |
| 917 | } |
| 918 | |
| 919 | static int emu_sound_ioctl(int fd, int request, void *argp) |
| 920 | { |
| 921 | int *arg = argp; |
| 922 | |
| 923 | #if 0 |
| 924 | dbg("snd ioctl(%d, %08x, %p)", fd, request, argp); |
| 925 | if (arg != NULL) |
| 926 | dbg_c(" [%d]", *arg); |
| 927 | dbg_c("\n"); |
| 928 | #endif |
| 929 | |
| 930 | /* People set strange frag settings on GP2X, which even manage |
| 931 | * to break audio on pandora (causes writes to fail). |
| 932 | * Catch this and set to something that works. */ |
| 933 | if (request == SNDCTL_DSP_SPEED) { |
| 934 | int ret, bsize, frag; |
| 935 | |
| 936 | // ~4ms. gpSP wants small buffers or else it stutters |
| 937 | // because of it's audio thread sync stuff |
| 938 | bsize = *arg / 250 * 4; |
| 939 | for (frag = 0; bsize; bsize >>= 1, frag++) |
| 940 | ; |
| 941 | |
| 942 | frag |= 16 << 16; // fragment count |
| 943 | ret = ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &frag); |
| 944 | if (ret != 0) { |
| 945 | err("snd ioctl SETFRAGMENT %08x: ", frag); |
| 946 | perror(NULL); |
| 947 | } |
| 948 | } |
| 949 | else if (request == SNDCTL_DSP_SETFRAGMENT) |
| 950 | return 0; |
| 951 | |
| 952 | return ioctl(fd, request, argp); |
| 953 | } |
| 954 | |
| 955 | int emu_do_ioctl(int fd, int request, void *argp) |
| 956 | { |
| 957 | if (fd == emu_interesting_fds[IFD_SOUND].fd) |
| 958 | return emu_sound_ioctl(fd, request, argp); |
| 959 | |
| 960 | switch (fd) { |
| 961 | /* *********************** */ |
| 962 | case FAKEDEV_FB0: |
| 963 | case FAKEDEV_FB1: |
| 964 | if (argp == NULL) |
| 965 | goto fail; |
| 966 | |
| 967 | switch (request) { |
| 968 | case FBIOGET_FSCREENINFO: { |
| 969 | struct fb_fix_screeninfo *fix = argp; |
| 970 | |
| 971 | memset(fix, 0, sizeof(*fix)); |
| 972 | strcpy(fix->id, "mmsp2_RGB0"); |
| 973 | fix->type = FB_TYPE_PACKED_PIXELS; |
| 974 | fix->accel = FB_ACCEL_NONE; |
| 975 | fix->visual = FB_VISUAL_TRUECOLOR; |
| 976 | fix->line_length = 320*2; |
| 977 | fix->smem_start = (fd == FAKEDEV_FB0) ? 0x03101000 : 0x03381000; |
| 978 | fix->smem_len = 320*240*2; |
| 979 | return 0; |
| 980 | } |
| 981 | case FBIOGET_VSCREENINFO: { |
| 982 | struct fb_var_screeninfo *var = argp; |
| 983 | static const struct fb_bitfield fbb_red = { offset: 11, length: 5, }; |
| 984 | static const struct fb_bitfield fbb_green = { offset: 5, length: 6, }; |
| 985 | static const struct fb_bitfield fbb_blue = { offset: 0, length: 5, }; |
| 986 | |
| 987 | memset(var, 0, sizeof(*var)); |
| 988 | var->activate = FB_ACTIVATE_NOW; |
| 989 | var->xres = |
| 990 | var->xres_virtual = 320; |
| 991 | var->yres = |
| 992 | var->yres_virtual = 240; |
| 993 | var->width = |
| 994 | var->height = -1; |
| 995 | var->vmode = FB_VMODE_NONINTERLACED; |
| 996 | var->bits_per_pixel = 16; |
| 997 | var->red = fbb_red; |
| 998 | var->green = fbb_green; |
| 999 | var->blue = fbb_blue; |
| 1000 | return 0; |
| 1001 | } |
| 1002 | case FBIOPUT_VSCREENINFO: { |
| 1003 | struct fb_var_screeninfo *var = argp; |
| 1004 | dbg(" put vscreen: %dx%d@%d\n", var->xres, var->yres, var->bits_per_pixel); |
| 1005 | if (var->xres != 320 || var->yres != 240 || var->bits_per_pixel != 16) |
| 1006 | return -1; |
| 1007 | return 0; |
| 1008 | } |
| 1009 | } |
| 1010 | |
| 1011 | /* *********************** */ |
| 1012 | case FAKEDEV_TTY0: |
| 1013 | // fake tty0 to make GPH SDL happy |
| 1014 | if (request == 0x4b46) // KDGKBENT |
| 1015 | return -1; |
| 1016 | return 0; |
| 1017 | } |
| 1018 | |
| 1019 | fail: |
| 1020 | err("bad/ni ioctl(%d, %08x, %p)\n", fd, request, argp); |
| 1021 | errno = EINVAL; |
| 1022 | return -1; |
| 1023 | } |
| 1024 | |
| 1025 | static const struct { |
| 1026 | const char *from; |
| 1027 | const char *to; |
| 1028 | } path_map[] = { |
| 1029 | { "/mnt/tmp/", "/tmp/" }, |
| 1030 | }; |
| 1031 | |
| 1032 | static const char *wrap_path(const char *path) |
| 1033 | { |
| 1034 | char *buff; |
| 1035 | size_t size; |
| 1036 | int i, len; |
| 1037 | |
| 1038 | // do only path mapping for now |
| 1039 | for (i = 0; i < ARRAY_SIZE(path_map); i++) { |
| 1040 | len = strlen(path_map[i].from); |
| 1041 | if (strncmp(path, path_map[i].from, len) == 0) { |
| 1042 | size = strlen(path) + strlen(path_map[i].to) + 1; |
| 1043 | buff = malloc(size); |
| 1044 | if (buff == NULL) |
| 1045 | break; |
| 1046 | snprintf(buff, size, "%s%s", path_map[i].to, path + len); |
| 1047 | dbg("mapped path \"%s\" -> \"%s\"\n", path, buff); |
| 1048 | return buff; |
| 1049 | } |
| 1050 | } |
| 1051 | |
| 1052 | return path; |
| 1053 | } |
| 1054 | |
| 1055 | void *emu_do_fopen(const char *path, const char *mode) |
| 1056 | { |
| 1057 | const char *w_path = wrap_path(path); |
| 1058 | FILE *ret; |
| 1059 | ret = fopen(w_path, mode); |
| 1060 | if (w_path != path) |
| 1061 | free((void *)w_path); |
| 1062 | return ret; |
| 1063 | } |
| 1064 | |
| 1065 | // FIXME: threads.. |
| 1066 | int emu_do_system(const char *command) |
| 1067 | { |
| 1068 | static char tmp_path[512]; |
| 1069 | const char *p2; |
| 1070 | char *p; |
| 1071 | int ret; |
| 1072 | |
| 1073 | if (command == NULL) |
| 1074 | return -1; |
| 1075 | |
| 1076 | // pass through stuff in PATH |
| 1077 | p = strchr(command, ' '); |
| 1078 | p2 = strchr(command, '/'); |
| 1079 | if (p2 == NULL || (p != NULL && p2 > p)) |
| 1080 | return system(command); |
| 1081 | |
| 1082 | make_local_path(tmp_path, sizeof(tmp_path), "ginge_prep"); |
| 1083 | p = tmp_path + strlen(tmp_path); |
| 1084 | |
| 1085 | p2 = wrap_path(command); |
| 1086 | snprintf(p, sizeof(tmp_path) - (p - tmp_path), " --nomenu %s", p2); |
| 1087 | if (p2 != command) |
| 1088 | free((void *)p2); |
| 1089 | |
| 1090 | dbg("system: \"%s\"\n", tmp_path); |
| 1091 | |
| 1092 | // the app might want the screen too.. |
| 1093 | fb_thread_pause(); |
| 1094 | ret = system(tmp_path); |
| 1095 | fb_thread_resume(); |
| 1096 | return ret; |
| 1097 | } |
| 1098 | |