deps/lightrec/lightrec.c

   1 // SPDX-License-Identifier: LGPL-2.1-or-later
   2 /*
   3  * Copyright (C) 2014-2021 Paul Cercueil <paul@crapouillou.net>
   4  */
   5
   6 #include "blockcache.h"
   7 #include "debug.h"
   8 #include "disassembler.h"
   9 #include "emitter.h"
  10 #include "interpreter.h"
  11 #include "lightrec-config.h"
  12 #include "lightning-wrapper.h"
  13 #include "lightrec.h"
  14 #include "memmanager.h"
  15 #include "reaper.h"
  16 #include "recompiler.h"
  17 #include "regcache.h"
  18 #include "optimizer.h"
  19 #include "tlsf/tlsf.h"
  20
  21 #include <errno.h>
  22 #include <inttypes.h>
  23 #include <limits.h>
  24 #if ENABLE_THREADED_COMPILER
  25 #include <stdatomic.h>
  26 #endif
  27 #include <stdbool.h>
  28 #include <stddef.h>
  29 #include <string.h>
  30
  31 static struct block * lightrec_precompile_block(struct lightrec_state *state,
  32                                                 u32 pc);
  33 static bool lightrec_block_is_fully_tagged(const struct block *block);
  34
  35 static void lightrec_mtc2(struct lightrec_state *state, u8 reg, u32 data);
  36 static u32 lightrec_mfc2(struct lightrec_state *state, u8 reg);
  37
  38 static void lightrec_reap_block(struct lightrec_state *state, void *data);
  39
  40 static void lightrec_default_sb(struct lightrec_state *state, u32 opcode,
  41                                 void *host, u32 addr, u32 data)
  42 {
  43         *(u8 *)host = (u8)data;
  44
  45         if (!(state->opt_flags & LIGHTREC_OPT_INV_DMA_ONLY))
  46                 lightrec_invalidate(state, addr, 1);
  47 }
  48
  49 static void lightrec_default_sh(struct lightrec_state *state, u32 opcode,
  50                                 void *host, u32 addr, u32 data)
  51 {
  52         *(u16 *)host = HTOLE16((u16)data);
  53
  54         if (!(state->opt_flags & LIGHTREC_OPT_INV_DMA_ONLY))
  55                 lightrec_invalidate(state, addr, 2);
  56 }
  57
  58 static void lightrec_default_sw(struct lightrec_state *state, u32 opcode,
  59                                 void *host, u32 addr, u32 data)
  60 {
  61         *(u32 *)host = HTOLE32(data);
  62
  63         if (!(state->opt_flags & LIGHTREC_OPT_INV_DMA_ONLY))
  64                 lightrec_invalidate(state, addr, 4);
  65 }
  66
  67 static u8 lightrec_default_lb(struct lightrec_state *state,
  68                               u32 opcode, void *host, u32 addr)
  69 {
  70         return *(u8 *)host;
  71 }
  72
  73 static u16 lightrec_default_lh(struct lightrec_state *state,
  74                                u32 opcode, void *host, u32 addr)
  75 {
  76         return LE16TOH(*(u16 *)host);
  77 }
  78
  79 static u32 lightrec_default_lw(struct lightrec_state *state,
  80                                u32 opcode, void *host, u32 addr)
  81 {
  82         return LE32TOH(*(u32 *)host);
  83 }
  84
  85 static u32 lightrec_default_lwu(struct lightrec_state *state,
  86                                 u32 opcode, void *host, u32 addr)
  87 {
  88         u32 val;
  89
  90         memcpy(&val, host, 4);
  91
  92         return LE32TOH(val);
  93 }
  94
  95 static void lightrec_default_swu(struct lightrec_state *state, u32 opcode,
  96                                  void *host, u32 addr, u32 data)
  97 {
  98         data = HTOLE32(data);
  99
 100         memcpy(host, &data, 4);
 101
 102         if (!(state->opt_flags & LIGHTREC_OPT_INV_DMA_ONLY))
 103                 lightrec_invalidate(state, addr & ~0x3, 8);
 104 }
 105
 106 static const struct lightrec_mem_map_ops lightrec_default_ops = {
 107         .sb = lightrec_default_sb,
 108         .sh = lightrec_default_sh,
 109         .sw = lightrec_default_sw,
 110         .lb = lightrec_default_lb,
 111         .lh = lightrec_default_lh,
 112         .lw = lightrec_default_lw,
 113         .lwu = lightrec_default_lwu,
 114         .swu = lightrec_default_swu,
 115 };
 116
 117 static void __segfault_cb(struct lightrec_state *state, u32 addr,
 118                           const struct block *block)
 119 {
 120         lightrec_set_exit_flags(state, LIGHTREC_EXIT_SEGFAULT);
 121         pr_err("Segmentation fault in recompiled code: invalid "
 122                "load/store at address "PC_FMT"\n", addr);
 123         if (block)
 124                 pr_err("Was executing block "PC_FMT"\n", block->pc);
 125 }
 126
 127 static void lightrec_swl(struct lightrec_state *state,
 128                          const struct lightrec_mem_map_ops *ops,
 129                          u32 opcode, void *host, u32 addr, u32 data)
 130 {
 131         unsigned int shift = addr & 0x3;
 132         unsigned int mask = shift < 3 ? GENMASK(31, (shift + 1) * 8) : 0;
 133         u32 old_data;
 134
 135         /* Align to 32 bits */
 136         addr &= ~3;
 137         host = (void *)((uintptr_t)host & ~3);
 138
 139         old_data = ops->lw(state, opcode, host, addr);
 140
 141         data = (data >> ((3 - shift) * 8)) | (old_data & mask);
 142
 143         ops->sw(state, opcode, host, addr, data);
 144 }
 145
 146 static void lightrec_swr(struct lightrec_state *state,
 147                          const struct lightrec_mem_map_ops *ops,
 148                          u32 opcode, void *host, u32 addr, u32 data)
 149 {
 150         unsigned int shift = addr & 0x3;
 151         unsigned int mask = (1 << (shift * 8)) - 1;
 152         u32 old_data;
 153
 154         /* Align to 32 bits */
 155         addr &= ~3;
 156         host = (void *)((uintptr_t)host & ~3);
 157
 158         old_data = ops->lw(state, opcode, host, addr);
 159
 160         data = (data << (shift * 8)) | (old_data & mask);
 161
 162         ops->sw(state, opcode, host, addr, data);
 163 }
 164
 165 static void lightrec_swc2(struct lightrec_state *state, union code op,
 166                           const struct lightrec_mem_map_ops *ops,
 167                           void *host, u32 addr)
 168 {
 169         u32 data = lightrec_mfc2(state, op.i.rt);
 170
 171         ops->sw(state, op.opcode, host, addr, data);
 172 }
 173
 174 static u32 lightrec_lwl(struct lightrec_state *state,
 175                         const struct lightrec_mem_map_ops *ops,
 176                         u32 opcode, void *host, u32 addr, u32 data)
 177 {
 178         unsigned int shift = addr & 0x3;
 179         unsigned int mask = (1 << (24 - shift * 8)) - 1;
 180         u32 old_data;
 181
 182         /* Align to 32 bits */
 183         addr &= ~3;
 184         host = (void *)((uintptr_t)host & ~3);
 185
 186         old_data = ops->lw(state, opcode, host, addr);
 187
 188         return (data & mask) | (old_data << (24 - shift * 8));
 189 }
 190
 191 static u32 lightrec_lwr(struct lightrec_state *state,
 192                         const struct lightrec_mem_map_ops *ops,
 193                         u32 opcode, void *host, u32 addr, u32 data)
 194 {
 195         unsigned int shift = addr & 0x3;
 196         unsigned int mask = shift ? GENMASK(31, 32 - shift * 8) : 0;
 197         u32 old_data;
 198
 199         /* Align to 32 bits */
 200         addr &= ~3;
 201         host = (void *)((uintptr_t)host & ~3);
 202
 203         old_data = ops->lw(state, opcode, host, addr);
 204
 205         return (data & mask) | (old_data >> (shift * 8));
 206 }
 207
 208 static void lightrec_lwc2(struct lightrec_state *state, union code op,
 209                           const struct lightrec_mem_map_ops *ops,
 210                           void *host, u32 addr)
 211 {
 212         u32 data = ops->lw(state, op.opcode, host, addr);
 213
 214         lightrec_mtc2(state, op.i.rt, data);
 215 }
 216
 217 static void lightrec_invalidate_map(struct lightrec_state *state,
 218                 const struct lightrec_mem_map *map, u32 addr, u32 len)
 219 {
 220         if (map == &state->maps[PSX_MAP_KERNEL_USER_RAM]) {
 221                 memset(lut_address(state, lut_offset(addr)), 0,
 222                        ((len + 3) / 4) * lut_elm_size(state));
 223         }
 224 }
 225
 226 static enum psx_map
 227 lightrec_get_map_idx(struct lightrec_state *state, u32 kaddr)
 228 {
 229         const struct lightrec_mem_map *map;
 230         unsigned int i;
 231
 232         for (i = 0; i < state->nb_maps; i++) {
 233                 map = &state->maps[i];
 234
 235                 if (kaddr >= map->pc && kaddr < map->pc + map->length)
 236                         return (enum psx_map) i;
 237         }
 238
 239         return PSX_MAP_UNKNOWN;
 240 }
 241
 242 const struct lightrec_mem_map *
 243 lightrec_get_map(struct lightrec_state *state, void **host, u32 kaddr)
 244 {
 245         const struct lightrec_mem_map *map;
 246         enum psx_map idx;
 247         u32 addr;
 248
 249         idx = lightrec_get_map_idx(state, kaddr);
 250         if (idx == PSX_MAP_UNKNOWN)
 251                 return NULL;
 252
 253         map = &state->maps[idx];
 254         addr = kaddr - map->pc;
 255
 256         while (map->mirror_of)
 257                 map = map->mirror_of;
 258
 259         if (host)
 260                 *host = map->address + addr;
 261
 262         return map;
 263 }
 264
 265 u32 lightrec_rw(struct lightrec_state *state, union code op, u32 base,
 266                 u32 data, u32 *flags, struct block *block, u16 offset)
 267 {
 268         const struct lightrec_mem_map *map;
 269         const struct lightrec_mem_map_ops *ops;
 270         u32 opcode = op.opcode;
 271         bool was_tagged = true;
 272         u16 old_flags;
 273         u32 addr;
 274         void *host;
 275
 276         addr = kunseg(base + (s16) op.i.imm);
 277
 278         map = lightrec_get_map(state, &host, addr);
 279         if (!map) {
 280                 __segfault_cb(state, addr, block);
 281                 return 0;
 282         }
 283
 284         if (flags)
 285                 was_tagged = LIGHTREC_FLAGS_GET_IO_MODE(*flags);
 286
 287         if (likely(!map->ops)) {
 288                 if (flags && !LIGHTREC_FLAGS_GET_IO_MODE(*flags)) {
 289                         /* Force parallel port accesses as HW accesses, because
 290                          * the direct-I/O emitters can't differenciate it. */
 291                         if (unlikely(map == &state->maps[PSX_MAP_PARALLEL_PORT]))
 292                                 *flags |= LIGHTREC_IO_MODE(LIGHTREC_IO_HW);
 293                         /* If the base register is 0x0, be extra suspicious.
 294                          * Some games (e.g. Sled Storm) actually do segmentation
 295                          * faults by using uninitialized pointers, which are
 296                          * later initialized to point to hardware registers. */
 297                         else if (op.i.rs && base == 0x0)
 298                                 *flags |= LIGHTREC_IO_MODE(LIGHTREC_IO_HW);
 299                         else
 300                                 *flags |= LIGHTREC_IO_MODE(LIGHTREC_IO_DIRECT);
 301                 }
 302
 303                 ops = &lightrec_default_ops;
 304         } else if (flags &&
 305                    LIGHTREC_FLAGS_GET_IO_MODE(*flags) == LIGHTREC_IO_DIRECT_HW) {
 306                 ops = &lightrec_default_ops;
 307         } else {
 308                 if (flags && !LIGHTREC_FLAGS_GET_IO_MODE(*flags))
 309                         *flags |= LIGHTREC_IO_MODE(LIGHTREC_IO_HW);
 310
 311                 ops = map->ops;
 312         }
 313
 314         if (!was_tagged) {
 315                 old_flags = block_set_flags(block, BLOCK_SHOULD_RECOMPILE);
 316
 317                 if (!(old_flags & BLOCK_SHOULD_RECOMPILE)) {
 318                         pr_debug("Opcode of block at "PC_FMT" has been tagged"
 319                                  " - flag for recompilation\n", block->pc);
 320
 321                         lut_write(state, lut_offset(block->pc), NULL);
 322                 }
 323         }
 324
 325         switch (op.i.op) {
 326         case OP_SB:
 327                 ops->sb(state, opcode, host, addr, data);
 328                 return 0;
 329         case OP_SH:
 330                 ops->sh(state, opcode, host, addr, data);
 331                 return 0;
 332         case OP_SWL:
 333                 lightrec_swl(state, ops, opcode, host, addr, data);
 334                 return 0;
 335         case OP_SWR:
 336                 lightrec_swr(state, ops, opcode, host, addr, data);
 337                 return 0;
 338         case OP_SW:
 339                 ops->sw(state, opcode, host, addr, data);
 340                 return 0;
 341         case OP_SWC2:
 342                 lightrec_swc2(state, op, ops, host, addr);
 343                 return 0;
 344         case OP_LB:
 345                 return (s32) (s8) ops->lb(state, opcode, host, addr);
 346         case OP_LBU:
 347                 return ops->lb(state, opcode, host, addr);
 348         case OP_LH:
 349                 return (s32) (s16) ops->lh(state, opcode, host, addr);
 350         case OP_LHU:
 351                 return ops->lh(state, opcode, host, addr);
 352         case OP_LWC2:
 353                 lightrec_lwc2(state, op, ops, host, addr);
 354                 return 0;
 355         case OP_LWL:
 356                 return lightrec_lwl(state, ops, opcode, host, addr, data);
 357         case OP_LWR:
 358                 return lightrec_lwr(state, ops, opcode, host, addr, data);
 359         case OP_META_LWU:
 360                 return ops->lwu(state, opcode, host, addr);
 361         case OP_META_SWU:
 362                 ops->swu(state, opcode, host, addr, data);
 363                 return 0;
 364         case OP_LW:
 365         default:
 366                 return ops->lw(state, opcode, host, addr);
 367         }
 368 }
 369
 370 static void lightrec_rw_helper(struct lightrec_state *state,
 371                                union code op, u32 *flags,
 372                                struct block *block, u16 offset)
 373 {
 374         u32 ret = lightrec_rw(state, op, state->regs.gpr[op.i.rs],
 375                               state->regs.gpr[op.i.rt], flags, block, offset);
 376
 377         switch (op.i.op) {
 378         case OP_LB:
 379         case OP_LBU:
 380         case OP_LH:
 381         case OP_LHU:
 382         case OP_LWL:
 383         case OP_LWR:
 384         case OP_LW:
 385         case OP_META_LWU:
 386                 if (OPT_HANDLE_LOAD_DELAYS && unlikely(!state->in_delay_slot_n)) {
 387                         state->temp_reg = ret;
 388                         state->in_delay_slot_n = 0xff;
 389                 } else if (op.i.rt) {
 390                         state->regs.gpr[op.i.rt] = ret;
 391                 }
 392                 fallthrough;
 393         default:
 394                 break;
 395         }
 396 }
 397
 398 static void lightrec_rw_cb(struct lightrec_state *state, u32 arg)
 399 {
 400         lightrec_rw_helper(state, (union code) arg, NULL, NULL, 0);
 401 }
 402
 403 static void lightrec_rw_generic_cb(struct lightrec_state *state, u32 arg)
 404 {
 405         struct block *block;
 406         struct opcode *op;
 407         u16 offset = (u16)arg;
 408
 409         block = lightrec_find_block_from_lut(state->block_cache,
 410                                              arg >> 16, state->curr_pc);
 411         if (unlikely(!block)) {
 412                 pr_err("rw_generic: No block found in LUT for "PC_FMT" offset 0x%"PRIx16"\n",
 413                          state->curr_pc, offset);
 414                 lightrec_set_exit_flags(state, LIGHTREC_EXIT_SEGFAULT);
 415                 return;
 416         }
 417
 418         op = &block->opcode_list[offset];
 419         lightrec_rw_helper(state, op->c, &op->flags, block, offset);
 420 }
 421
 422 static u32 clamp_s32(s32 val, s32 min, s32 max)
 423 {
 424         return val < min ? min : val > max ? max : val;
 425 }
 426
 427 static u16 load_u16(u32 *ptr)
 428 {
 429         return ((struct u16x2 *) ptr)->l;
 430 }
 431
 432 static void store_u16(u32 *ptr, u16 value)
 433 {
 434         ((struct u16x2 *) ptr)->l = value;
 435 }
 436
 437 static u32 lightrec_mfc2(struct lightrec_state *state, u8 reg)
 438 {
 439         s16 gteir1, gteir2, gteir3;
 440
 441         switch (reg) {
 442         case 1:
 443         case 3:
 444         case 5:
 445         case 8:
 446         case 9:
 447         case 10:
 448         case 11:
 449                 return (s32)(s16) load_u16(&state->regs.cp2d[reg]);
 450         case 7:
 451         case 16:
 452         case 17:
 453         case 18:
 454         case 19:
 455                 return load_u16(&state->regs.cp2d[reg]);
 456         case 28:
 457         case 29:
 458                 gteir1 = (s16) load_u16(&state->regs.cp2d[9]);
 459                 gteir2 = (s16) load_u16(&state->regs.cp2d[10]);
 460                 gteir3 = (s16) load_u16(&state->regs.cp2d[11]);
 461
 462                 return clamp_s32(gteir1 >> 7, 0, 0x1f) << 0 |
 463                         clamp_s32(gteir2 >> 7, 0, 0x1f) << 5 |
 464                         clamp_s32(gteir3 >> 7, 0, 0x1f) << 10;
 465         case 15:
 466                 reg = 14;
 467                 fallthrough;
 468         default:
 469                 return state->regs.cp2d[reg];
 470         }
 471 }
 472
 473 u32 lightrec_mfc(struct lightrec_state *state, union code op)
 474 {
 475         u32 val;
 476
 477         if (op.i.op == OP_CP0)
 478                 return state->regs.cp0[op.r.rd];
 479
 480         if (op.i.op == OP_SWC2) {
 481                 val = lightrec_mfc2(state, op.i.rt);
 482         } else if (op.r.rs == OP_CP2_BASIC_MFC2)
 483                 val = lightrec_mfc2(state, op.r.rd);
 484         else {
 485                 val = state->regs.cp2c[op.r.rd];
 486
 487                 switch (op.r.rd) {
 488                 case 4:
 489                 case 12:
 490                 case 20:
 491                 case 26:
 492                 case 27:
 493                 case 29:
 494                 case 30:
 495                         val = (u32)(s16)val;
 496                         fallthrough;
 497                 default:
 498                         break;
 499                 }
 500         }
 501
 502         if (state->ops.cop2_notify)
 503                 (*state->ops.cop2_notify)(state, op.opcode, val);
 504
 505         return val;
 506 }
 507
 508 static void lightrec_mfc_cb(struct lightrec_state *state, union code op)
 509 {
 510         u32 rt = lightrec_mfc(state, op);
 511
 512         if (op.i.op == OP_SWC2)
 513                 state->temp_reg = rt;
 514         else if (op.r.rt)
 515                 state->regs.gpr[op.r.rt] = rt;
 516 }
 517
 518 static void lightrec_mtc0(struct lightrec_state *state, u8 reg, u32 data)
 519 {
 520         u32 status, oldstatus, cause;
 521
 522         switch (reg) {
 523         case 1:
 524         case 4:
 525         case 8:
 526         case 14:
 527         case 15:
 528                 /* Those registers are read-only */
 529                 return;
 530         default:
 531                 break;
 532         }
 533
 534         if (reg == 12) {
 535                 status = state->regs.cp0[12];
 536                 oldstatus = status;
 537
 538                 if (status & ~data & BIT(16)) {
 539                         state->ops.enable_ram(state, true);
 540                         lightrec_invalidate_all(state);
 541                 } else if (~status & data & BIT(16)) {
 542                         state->ops.enable_ram(state, false);
 543                 }
 544         }
 545
 546         if (reg == 13) {
 547                 state->regs.cp0[13] &= ~0x300;
 548                 state->regs.cp0[13] |= data & 0x300;
 549         } else {
 550                 state->regs.cp0[reg] = data;
 551         }
 552
 553         if (reg == 12 || reg == 13) {
 554                 cause = state->regs.cp0[13];
 555                 status = state->regs.cp0[12];
 556
 557                 /* Handle software interrupts */
 558                 if ((!!(status & cause & 0x300)) & status)
 559                         lightrec_set_exit_flags(state, LIGHTREC_EXIT_CHECK_INTERRUPT);
 560
 561                 /* Handle hardware interrupts */
 562                 if (reg == 12 && !(~status & 0x401) && (~oldstatus & 0x401))
 563                         lightrec_set_exit_flags(state, LIGHTREC_EXIT_CHECK_INTERRUPT);
 564         }
 565 }
 566
 567 static u32 count_leading_bits(s32 data)
 568 {
 569         u32 cnt = 33;
 570
 571 #ifdef __has_builtin
 572 #if __has_builtin(__builtin_clrsb)
 573         return 1 + __builtin_clrsb(data);
 574 #endif
 575 #endif
 576
 577         data = (data ^ (data >> 31)) << 1;
 578
 579         do {
 580                 cnt -= 1;
 581                 data >>= 1;
 582         } while (data);
 583
 584         return cnt;
 585 }
 586
 587 static void lightrec_mtc2(struct lightrec_state *state, u8 reg, u32 data)
 588 {
 589         switch (reg) {
 590         case 15:
 591                 state->regs.cp2d[12] = state->regs.cp2d[13];
 592                 state->regs.cp2d[13] = state->regs.cp2d[14];
 593                 state->regs.cp2d[14] = data;
 594                 break;
 595         case 28:
 596                 state->regs.cp2d[9] = (data << 7) & 0xf80;
 597                 state->regs.cp2d[10] = (data << 2) & 0xf80;
 598                 state->regs.cp2d[11] = (data >> 3) & 0xf80;
 599                 break;
 600         case 31:
 601                 return;
 602         case 30:
 603                 state->regs.cp2d[31] = count_leading_bits((s32) data);
 604                 fallthrough;
 605         default:
 606                 state->regs.cp2d[reg] = data;
 607                 break;
 608         }
 609 }
 610
 611 static void lightrec_ctc2(struct lightrec_state *state, u8 reg, u32 data)
 612 {
 613         switch (reg) {
 614         case 4:
 615         case 12:
 616         case 20:
 617         case 26:
 618         case 27:
 619         case 29:
 620         case 30:
 621                 store_u16(&state->regs.cp2c[reg], data);
 622                 break;
 623         case 31:
 624                 data = (data & 0x7ffff000) | !!(data & 0x7f87e000) << 31;
 625                 fallthrough;
 626         default:
 627                 state->regs.cp2c[reg] = data;
 628                 break;
 629         }
 630 }
 631
 632 void lightrec_mtc(struct lightrec_state *state, union code op, u8 reg, u32 data)
 633 {
 634         if (op.i.op == OP_CP0) {
 635                 lightrec_mtc0(state, reg, data);
 636         } else {
 637                 if (op.i.op == OP_LWC2 || op.r.rs != OP_CP2_BASIC_CTC2)
 638                         lightrec_mtc2(state, reg, data);
 639                 else
 640                         lightrec_ctc2(state, reg, data);
 641
 642                 if (state->ops.cop2_notify)
 643                         (*state->ops.cop2_notify)(state, op.opcode, data);
 644         }
 645 }
 646
 647 static void lightrec_mtc_cb(struct lightrec_state *state, u32 arg)
 648 {
 649         union code op = (union code) arg;
 650         u32 data;
 651         u8 reg;
 652
 653         if (op.i.op == OP_LWC2) {
 654                 data = state->temp_reg;
 655                 reg = op.i.rt;
 656         } else {
 657                 data = state->regs.gpr[op.r.rt];
 658                 reg = op.r.rd;
 659         }
 660
 661         lightrec_mtc(state, op, reg, data);
 662 }
 663
 664 void lightrec_rfe(struct lightrec_state *state)
 665 {
 666         u32 status;
 667
 668         /* Read CP0 Status register (r12) */
 669         status = state->regs.cp0[12];
 670
 671         /* Switch the bits */
 672         status = ((status & 0x3c) >> 2) | (status & ~0xf);
 673
 674         /* Write it back */
 675         lightrec_mtc0(state, 12, status);
 676 }
 677
 678 void lightrec_cp(struct lightrec_state *state, union code op)
 679 {
 680         if (op.i.op == OP_CP0) {
 681                 pr_err("Invalid CP opcode to coprocessor #0\n");
 682                 return;
 683         }
 684
 685         (*state->ops.cop2_op)(state, op.opcode);
 686 }
 687
 688 static void lightrec_cp_cb(struct lightrec_state *state, u32 arg)
 689 {
 690         lightrec_cp(state, (union code) arg);
 691 }
 692
 693 static struct block * lightrec_get_block(struct lightrec_state *state, u32 pc)
 694 {
 695         struct block *block = lightrec_find_block(state->block_cache, pc);
 696         u8 old_flags;
 697
 698         if (block && lightrec_block_is_outdated(state, block)) {
 699                 pr_debug("Block at "PC_FMT" is outdated!\n", block->pc);
 700
 701                 old_flags = block_set_flags(block, BLOCK_IS_DEAD);
 702                 if (!(old_flags & BLOCK_IS_DEAD)) {
 703                         /* Make sure the recompiler isn't processing the block
 704                          * we'll destroy */
 705                         if (ENABLE_THREADED_COMPILER)
 706                                 lightrec_recompiler_remove(state->rec, block);
 707
 708                         remove_from_code_lut(state->block_cache, block);
 709
 710                         if (ENABLE_THREADED_COMPILER) {
 711                                 lightrec_reaper_add(state->reaper,
 712                                                     lightrec_reap_block, block);
 713                         } else {
 714                                 lightrec_unregister_block(state->block_cache, block);
 715                                 lightrec_free_block(state, block);
 716                         }
 717                 }
 718
 719                 block = NULL;
 720         }
 721
 722         if (!block) {
 723                 block = lightrec_precompile_block(state, pc);
 724                 if (!block) {
 725                         pr_err("Unable to recompile block at "PC_FMT"\n", pc);
 726                         lightrec_set_exit_flags(state, LIGHTREC_EXIT_SEGFAULT);
 727                         return NULL;
 728                 }
 729
 730                 lightrec_register_block(state->block_cache, block);
 731         }
 732
 733         return block;
 734 }
 735
 736 static void * get_next_block_func(struct lightrec_state *state, u32 pc)
 737 {
 738         struct block *block;
 739         bool should_recompile;
 740         void *func;
 741         int err;
 742
 743         do {
 744                 func = lut_read(state, lut_offset(pc));
 745                 if (func && func != state->get_next_block)
 746                         break;
 747
 748                 block = lightrec_get_block(state, pc);
 749
 750                 if (unlikely(!block))
 751                         break;
 752
 753                 if (OPT_REPLACE_MEMSET &&
 754                     block_has_flag(block, BLOCK_IS_MEMSET)) {
 755                         func = state->memset_func;
 756                         break;
 757                 }
 758
 759                 should_recompile = block_has_flag(block, BLOCK_SHOULD_RECOMPILE) &&
 760                         !block_has_flag(block, BLOCK_NEVER_COMPILE) &&
 761                         !block_has_flag(block, BLOCK_IS_DEAD);
 762
 763                 if (unlikely(should_recompile)) {
 764                         pr_debug("Block at "PC_FMT" should recompile\n", pc);
 765
 766                         if (ENABLE_THREADED_COMPILER) {
 767                                 lightrec_recompiler_add(state->rec, block);
 768                         } else {
 769                                 err = lightrec_compile_block(state->cstate, block);
 770                                 if (err) {
 771                                         state->exit_flags = LIGHTREC_EXIT_NOMEM;
 772                                         return NULL;
 773                                 }
 774                         }
 775                 }
 776
 777                 if (ENABLE_THREADED_COMPILER && likely(!should_recompile))
 778                         func = lightrec_recompiler_run_first_pass(state, block, &pc);
 779                 else
 780                         func = block->function;
 781
 782                 if (likely(func))
 783                         break;
 784
 785                 if (unlikely(block_has_flag(block, BLOCK_NEVER_COMPILE))) {
 786                         pc = lightrec_emulate_block(state, block, pc);
 787
 788                 } else if (!ENABLE_THREADED_COMPILER) {
 789                         /* Block wasn't compiled yet - run the interpreter */
 790                         if (block_has_flag(block, BLOCK_FULLY_TAGGED))
 791                                 pr_debug("Block fully tagged, skipping first pass\n");
 792                         else if (ENABLE_FIRST_PASS && likely(!should_recompile))
 793                                 pc = lightrec_emulate_block(state, block, pc);
 794
 795                         /* Then compile it using the profiled data */
 796                         err = lightrec_compile_block(state->cstate, block);
 797                         if (err) {
 798                                 state->exit_flags = LIGHTREC_EXIT_NOMEM;
 799                                 return NULL;
 800                         }
 801                 } else if (unlikely(block_has_flag(block, BLOCK_IS_DEAD))) {
 802                         /*
 803                          * If the block is dead but has never been compiled,
 804                          * then its function pointer is NULL and we cannot
 805                          * execute the block. In that case, reap all the dead
 806                          * blocks now, and in the next loop we will create a
 807                          * new block.
 808                          */
 809                         lightrec_reaper_reap(state->reaper);
 810                 } else {
 811                         lightrec_recompiler_add(state->rec, block);
 812                 }
 813         } while (state->exit_flags == LIGHTREC_EXIT_NORMAL
 814                  && state->current_cycle < state->target_cycle);
 815
 816         state->curr_pc = pc;
 817         return func;
 818 }
 819
 820 static void * lightrec_alloc_code(struct lightrec_state *state, size_t size)
 821 {
 822         void *code;
 823
 824         if (ENABLE_THREADED_COMPILER)
 825                 lightrec_code_alloc_lock(state);
 826
 827         code = tlsf_malloc(state->tlsf, size);
 828
 829         if (ENABLE_THREADED_COMPILER)
 830                 lightrec_code_alloc_unlock(state);
 831
 832         return code;
 833 }
 834
 835 static void lightrec_realloc_code(struct lightrec_state *state,
 836                                   void *ptr, size_t size)
 837 {
 838         /* NOTE: 'size' MUST be smaller than the size specified during
 839          * the allocation. */
 840
 841         if (ENABLE_THREADED_COMPILER)
 842                 lightrec_code_alloc_lock(state);
 843
 844         tlsf_realloc(state->tlsf, ptr, size);
 845
 846         if (ENABLE_THREADED_COMPILER)
 847                 lightrec_code_alloc_unlock(state);
 848 }
 849
 850 static void lightrec_free_code(struct lightrec_state *state, void *ptr)
 851 {
 852         if (ENABLE_THREADED_COMPILER)
 853                 lightrec_code_alloc_lock(state);
 854
 855         tlsf_free(state->tlsf, ptr);
 856
 857         if (ENABLE_THREADED_COMPILER)
 858                 lightrec_code_alloc_unlock(state);
 859 }
 860
 861 static char lightning_code_data[0x80000];
 862
 863 static void * lightrec_emit_code(struct lightrec_state *state,
 864                                  const struct block *block,
 865                                  jit_state_t *_jit, unsigned int *size)
 866 {
 867         bool has_code_buffer = ENABLE_CODE_BUFFER && state->tlsf;
 868         jit_word_t code_size, new_code_size;
 869         void *code;
 870
 871         jit_realize();
 872
 873         if (ENABLE_DISASSEMBLER)
 874                 jit_set_data(lightning_code_data, sizeof(lightning_code_data), 0);
 875         else
 876                 jit_set_data(NULL, 0, JIT_DISABLE_DATA | JIT_DISABLE_NOTE);
 877
 878         if (has_code_buffer) {
 879                 jit_get_code(&code_size);
 880
 881 #ifdef __i386__
 882                 /* Lightning's code size estimation routine is buggy on x86 and
 883                  * will return a value that's too small. */
 884                 code_size *= 2;
 885 #endif
 886
 887                 code = lightrec_alloc_code(state, (size_t) code_size);
 888
 889                 if (!code) {
 890                         if (ENABLE_THREADED_COMPILER) {
 891                                 /* If we're using the threaded compiler, return
 892                                  * an allocation error here. The threaded
 893                                  * compiler will then empty its job queue and
 894                                  * request a code flush using the reaper. */
 895                                 return NULL;
 896                         }
 897
 898                         /* Remove outdated blocks, and try again */
 899                         lightrec_remove_outdated_blocks(state->block_cache, block);
 900
 901                         pr_debug("Re-try to alloc %zu bytes...\n", code_size);
 902
 903                         code = lightrec_alloc_code(state, code_size);
 904                         if (!code) {
 905                                 pr_err("Could not alloc even after removing old blocks!\n");
 906                                 return NULL;
 907                         }
 908                 }
 909
 910                 jit_set_code(code, code_size);
 911         }
 912
 913         code = jit_emit();
 914         if (!code) {
 915                 if (has_code_buffer)
 916                         lightrec_free_code(state, code);
 917
 918                 return NULL;
 919         }
 920
 921         jit_get_code(&new_code_size);
 922         lightrec_register(MEM_FOR_CODE, new_code_size);
 923
 924         if (has_code_buffer) {
 925                 lightrec_realloc_code(state, code, (size_t) new_code_size);
 926
 927                 pr_debug("Creating code block at address 0x%" PRIxPTR ", "
 928                          "code size: %" PRIuPTR " new: %" PRIuPTR "\n",
 929                          (uintptr_t) code, code_size, new_code_size);
 930         }
 931
 932         *size = (unsigned int) new_code_size;
 933
 934         if (state->ops.code_inv)
 935                 state->ops.code_inv(code, new_code_size);
 936
 937         return code;
 938 }
 939
 940 static struct block * generate_wrapper(struct lightrec_state *state)
 941 {
 942         struct block *block;
 943         jit_state_t *_jit;
 944         unsigned int i;
 945
 946         block = lightrec_malloc(state, MEM_FOR_IR, sizeof(*block));
 947         if (!block)
 948                 goto err_no_mem;
 949
 950         _jit = jit_new_state();
 951         if (!_jit)
 952                 goto err_free_block;
 953
 954         jit_name("RW wrapper");
 955         jit_note(__FILE__, __LINE__);
 956
 957         /* Wrapper entry point */
 958         jit_prolog();
 959         jit_tramp(256);
 960
 961         /* Load pointer to C wrapper */
 962         jit_addr(JIT_R1, JIT_R1, LIGHTREC_REG_STATE);
 963         jit_ldxi(JIT_R1, JIT_R1, lightrec_offset(c_wrappers));
 964
 965         jit_epilog();
 966         jit_prolog();
 967
 968         /* Save all temporaries on stack */
 969         for (i = 0; i < NUM_TEMPS; i++) {
 970                 if (i + FIRST_TEMP != 1) {
 971                         jit_stxi(lightrec_offset(wrapper_regs[i]),
 972                                  LIGHTREC_REG_STATE, JIT_R(i + FIRST_TEMP));
 973                 }
 974         }
 975
 976         jit_getarg(JIT_R2, jit_arg());
 977
 978         jit_prepare();
 979         jit_pushargr(LIGHTREC_REG_STATE);
 980         jit_pushargr(JIT_R2);
 981
 982         jit_ldxi_ui(JIT_R2, LIGHTREC_REG_STATE, lightrec_offset(target_cycle));
 983
 984         /* state->current_cycle = state->target_cycle - delta; */
 985         jit_subr(LIGHTREC_REG_CYCLE, JIT_R2, LIGHTREC_REG_CYCLE);
 986         jit_stxi_i(lightrec_offset(current_cycle), LIGHTREC_REG_STATE, LIGHTREC_REG_CYCLE);
 987
 988         /* Call the wrapper function */
 989         jit_finishr(JIT_R1);
 990
 991         /* delta = state->target_cycle - state->current_cycle */;
 992         jit_ldxi_ui(LIGHTREC_REG_CYCLE, LIGHTREC_REG_STATE, lightrec_offset(current_cycle));
 993         jit_ldxi_ui(JIT_R1, LIGHTREC_REG_STATE, lightrec_offset(target_cycle));
 994         jit_subr(LIGHTREC_REG_CYCLE, JIT_R1, LIGHTREC_REG_CYCLE);
 995
 996         /* Restore temporaries from stack */
 997         for (i = 0; i < NUM_TEMPS; i++) {
 998                 if (i + FIRST_TEMP != 1) {
 999                         jit_ldxi(JIT_R(i + FIRST_TEMP), LIGHTREC_REG_STATE,
1000                                  lightrec_offset(wrapper_regs[i]));
1001                 }
1002         }
1003
1004         jit_ret();
1005         jit_epilog();
1006
1007         block->_jit = _jit;
1008         block->opcode_list = NULL;
1009         block->flags = BLOCK_NO_OPCODE_LIST;
1010         block->nb_ops = 0;
1011
1012         block->function = lightrec_emit_code(state, block, _jit,
1013                                              &block->code_size);
1014         if (!block->function)
1015                 goto err_free_jit;
1016
1017         state->c_wrapper = block->function;
1018
1019         if (ENABLE_DISASSEMBLER) {
1020                 pr_debug("Wrapper block:\n");
1021                 jit_disassemble();
1022         }
1023
1024         jit_clear_state();
1025         return block;
1026
1027 err_free_jit:
1028         jit_destroy_state();
1029 err_free_block:
1030         lightrec_free(state, MEM_FOR_IR, sizeof(*block), block);
1031 err_no_mem:
1032         pr_err("Unable to compile wrapper: Out of memory\n");
1033         return NULL;
1034 }
1035
1036 static u32 lightrec_memset(struct lightrec_state *state)
1037 {
1038         u32 kunseg_pc = kunseg(state->regs.gpr[4]);
1039         void *host;
1040         const struct lightrec_mem_map *map = lightrec_get_map(state, &host, kunseg_pc);
1041         u32 length = state->regs.gpr[5] * 4;
1042
1043         if (!map) {
1044                 pr_err("Unable to find memory map for memset target address "PC_FMT"\n",
1045                        kunseg_pc);
1046                 return 0;
1047         }
1048
1049         pr_debug("Calling host memset, "PC_FMT" (host address 0x%"PRIxPTR") for %u bytes\n",
1050                  kunseg_pc, (uintptr_t)host, length);
1051         memset(host, 0, length);
1052
1053         if (!(state->opt_flags & LIGHTREC_OPT_INV_DMA_ONLY))
1054                 lightrec_invalidate_map(state, map, kunseg_pc, length);
1055
1056         /* Rough estimation of the number of cycles consumed */
1057         return 8 + 5 * (length  + 3 / 4);
1058 }
1059
1060 static u32 lightrec_check_load_delay(struct lightrec_state *state, u32 pc, u8 reg)
1061 {
1062         struct block *block;
1063         union code first_op;
1064
1065         first_op = lightrec_read_opcode(state, pc);
1066
1067         if (likely(!opcode_reads_register(first_op, reg))) {
1068                 state->regs.gpr[reg] = state->temp_reg;
1069         } else {
1070                 block = lightrec_get_block(state, pc);
1071                 if (unlikely(!block)) {
1072                         pr_err("Unable to get block at "PC_FMT"\n", pc);
1073                         lightrec_set_exit_flags(state, LIGHTREC_EXIT_SEGFAULT);
1074                         pc = 0;
1075                 } else {
1076                         pc = lightrec_handle_load_delay(state, block, pc, reg);
1077                 }
1078         }
1079
1080         return pc;
1081 }
1082
1083 static void update_cycle_counter_before_c(jit_state_t *_jit)
1084 {
1085         /* update state->current_cycle */
1086         jit_ldxi_i(JIT_R2, LIGHTREC_REG_STATE, lightrec_offset(target_cycle));
1087         jit_subr(JIT_R1, JIT_R2, LIGHTREC_REG_CYCLE);
1088         jit_stxi_i(lightrec_offset(current_cycle), LIGHTREC_REG_STATE, JIT_R1);
1089 }
1090
1091 static void update_cycle_counter_after_c(jit_state_t *_jit)
1092 {
1093         /* Recalc the delta */
1094         jit_ldxi_i(JIT_R1, LIGHTREC_REG_STATE, lightrec_offset(current_cycle));
1095         jit_ldxi_i(JIT_R2, LIGHTREC_REG_STATE, lightrec_offset(target_cycle));
1096         jit_subr(LIGHTREC_REG_CYCLE, JIT_R2, JIT_R1);
1097 }
1098
1099 static void sync_next_pc(jit_state_t *_jit)
1100 {
1101         if (lightrec_store_next_pc()) {
1102                 jit_ldxi_ui(JIT_V0, LIGHTREC_REG_STATE,
1103                             lightrec_offset(next_pc));
1104         }
1105 }
1106
1107 static struct block * generate_dispatcher(struct lightrec_state *state)
1108 {
1109         struct block *block;
1110         jit_state_t *_jit;
1111         jit_node_t *to_end, *loop, *loop2,
1112                    *addr, *addr2, *addr3, *addr4, *addr5;
1113         unsigned int i;
1114         u32 offset;
1115
1116         block = lightrec_malloc(state, MEM_FOR_IR, sizeof(*block));
1117         if (!block)
1118                 goto err_no_mem;
1119
1120         _jit = jit_new_state();
1121         if (!_jit)
1122                 goto err_free_block;
1123
1124         jit_name("dispatcher");
1125         jit_note(__FILE__, __LINE__);
1126
1127         jit_prolog();
1128         jit_frame(256);
1129
1130         jit_getarg(LIGHTREC_REG_STATE, jit_arg());
1131         jit_getarg(JIT_V0, jit_arg());
1132         jit_getarg(JIT_V1, jit_arg());
1133         jit_getarg_i(LIGHTREC_REG_CYCLE, jit_arg());
1134
1135         /* Force all callee-saved registers to be pushed on the stack */
1136         for (i = 0; i < NUM_REGS; i++)
1137                 jit_movr(JIT_V(i + FIRST_REG), JIT_V(i + FIRST_REG));
1138
1139         loop = jit_label();
1140
1141         /* Call the block's code */
1142         jit_jmpr(JIT_V1);
1143
1144         /* The block will jump here, with the number of cycles remaining in
1145          * LIGHTREC_REG_CYCLE */
1146         addr2 = jit_indirect();
1147
1148         sync_next_pc(_jit);
1149
1150         loop2 = jit_label();
1151
1152         /* Jump to end if state->target_cycle < state->current_cycle */
1153         to_end = jit_blei(LIGHTREC_REG_CYCLE, 0);
1154
1155         /* Convert next PC to KUNSEG and avoid mirrors */
1156         jit_andi(JIT_V1, JIT_V0, RAM_SIZE - 1);
1157         jit_andi(JIT_R2, JIT_V0, BIOS_SIZE - 1);
1158         jit_andi(JIT_R1, JIT_V0, BIT(28));
1159         jit_addi(JIT_R2, JIT_R2, RAM_SIZE);
1160         jit_movnr(JIT_V1, JIT_R2, JIT_R1);
1161
1162         /* If possible, use the code LUT */
1163         if (!lut_is_32bit(state))
1164                 jit_lshi(JIT_V1, JIT_V1, 1);
1165         jit_add_state(JIT_V1, JIT_V1);
1166
1167         offset = lightrec_offset(code_lut);
1168         if (lut_is_32bit(state))
1169                 jit_ldxi_ui(JIT_V1, JIT_V1, offset);
1170         else
1171                 jit_ldxi(JIT_V1, JIT_V1, offset);
1172
1173         /* Store back the current PC to the lightrec_state structure */
1174         jit_stxi_i(lightrec_offset(curr_pc), LIGHTREC_REG_STATE, JIT_V0);
1175
1176         /* If we get non-NULL, loop */
1177         jit_patch_at(jit_bnei(JIT_V1, 0), loop);
1178
1179         /* The code LUT will be set to this address when the block at the target
1180          * PC has been preprocessed but not yet compiled by the threaded
1181          * recompiler */
1182         addr = jit_indirect();
1183
1184         /* Slow path: call C function get_next_block_func() */
1185
1186         if (ENABLE_FIRST_PASS || OPT_DETECT_IMPOSSIBLE_BRANCHES) {
1187                 /* We may call the interpreter - update state->current_cycle */
1188                 update_cycle_counter_before_c(_jit);
1189         }
1190
1191         jit_prepare();
1192         jit_pushargr(LIGHTREC_REG_STATE);
1193         jit_pushargr(JIT_V0);
1194
1195         /* Save the cycles register if needed */
1196         if (!(ENABLE_FIRST_PASS || OPT_DETECT_IMPOSSIBLE_BRANCHES))
1197                 jit_movr(JIT_V0, LIGHTREC_REG_CYCLE);
1198
1199         /* Get the next block */
1200         jit_finishi(&get_next_block_func);
1201         jit_retval(JIT_V1);
1202
1203         if (ENABLE_FIRST_PASS || OPT_DETECT_IMPOSSIBLE_BRANCHES) {
1204                 /* The interpreter may have updated state->current_cycle and
1205                  * state->target_cycle - recalc the delta */
1206                 update_cycle_counter_after_c(_jit);
1207         } else {
1208                 jit_movr(LIGHTREC_REG_CYCLE, JIT_V0);
1209         }
1210
1211         /* Reset JIT_V0 to the next PC */
1212         jit_ldxi_ui(JIT_V0, LIGHTREC_REG_STATE, lightrec_offset(curr_pc));
1213
1214         /* If we get non-NULL, loop */
1215         jit_patch_at(jit_bnei(JIT_V1, 0), loop);
1216
1217         /* When exiting, the recompiled code will jump to that address */
1218         jit_note(__FILE__, __LINE__);
1219         jit_patch(to_end);
1220
1221         /* Store back the current PC to the lightrec_state structure */
1222         jit_stxi_i(lightrec_offset(curr_pc), LIGHTREC_REG_STATE, JIT_V0);
1223
1224         jit_retr(LIGHTREC_REG_CYCLE);
1225
1226         if (OPT_REPLACE_MEMSET) {
1227                 /* Blocks will jump here when they need to call
1228                  * lightrec_memset() */
1229                 addr3 = jit_indirect();
1230
1231                 jit_movr(JIT_V1, LIGHTREC_REG_CYCLE);
1232
1233                 jit_prepare();
1234                 jit_pushargr(LIGHTREC_REG_STATE);
1235
1236                 jit_finishi(lightrec_memset);
1237                 jit_retval(LIGHTREC_REG_CYCLE);
1238
1239                 jit_ldxi_ui(JIT_V0, LIGHTREC_REG_STATE, lightrec_offset(regs.gpr[31]));
1240
1241                 jit_subr(LIGHTREC_REG_CYCLE, JIT_V1, LIGHTREC_REG_CYCLE);
1242
1243                 jit_patch_at(jit_b(), loop2);
1244         }
1245
1246         if (OPT_DETECT_IMPOSSIBLE_BRANCHES) {
1247                 /* Blocks will jump here when they reach a branch that should
1248                  * be executed with the interpreter, passing the branch's PC
1249                  * in JIT_V0 and the address of the block in JIT_V1. */
1250                 addr4 = jit_indirect();
1251
1252                 sync_next_pc(_jit);
1253                 update_cycle_counter_before_c(_jit);
1254
1255                 jit_prepare();
1256                 jit_pushargr(LIGHTREC_REG_STATE);
1257                 jit_pushargr(JIT_V1);
1258                 jit_pushargr(JIT_V0);
1259                 jit_finishi(lightrec_emulate_block);
1260
1261                 jit_retval(JIT_V0);
1262
1263                 update_cycle_counter_after_c(_jit);
1264
1265                 jit_patch_at(jit_b(), loop2);
1266
1267         }
1268
1269         if (OPT_HANDLE_LOAD_DELAYS) {
1270                 /* Blocks will jump here when they reach a branch with a load
1271                  * opcode in its delay slot. The delay slot has already been
1272                  * executed; the load value is in (state->temp_reg), and the
1273                  * register number is in JIT_V1.
1274                  * Jump to a C function which will evaluate the branch target's
1275                  * first opcode, to make sure that it does not read the register
1276                  * in question; and if it does, handle it accordingly. */
1277                 addr5 = jit_indirect();
1278
1279                 sync_next_pc(_jit);
1280                 update_cycle_counter_before_c(_jit);
1281
1282                 jit_prepare();
1283                 jit_pushargr(LIGHTREC_REG_STATE);
1284                 jit_pushargr(JIT_V0);
1285                 jit_pushargr(JIT_V1);
1286                 jit_finishi(lightrec_check_load_delay);
1287
1288                 jit_retval(JIT_V0);
1289
1290                 update_cycle_counter_after_c(_jit);
1291
1292                 jit_patch_at(jit_b(), loop2);
1293         }
1294
1295         jit_epilog();
1296
1297         block->_jit = _jit;
1298         block->opcode_list = NULL;
1299         block->flags = BLOCK_NO_OPCODE_LIST;
1300         block->nb_ops = 0;
1301
1302         block->function = lightrec_emit_code(state, block, _jit,
1303                                              &block->code_size);
1304         if (!block->function)
1305                 goto err_free_jit;
1306
1307         state->eob_wrapper_func = jit_address(addr2);
1308         if (OPT_DETECT_IMPOSSIBLE_BRANCHES)
1309                 state->interpreter_func = jit_address(addr4);
1310         if (OPT_HANDLE_LOAD_DELAYS)
1311                 state->ds_check_func = jit_address(addr5);
1312         if (OPT_REPLACE_MEMSET)
1313                 state->memset_func = jit_address(addr3);
1314         state->get_next_block = jit_address(addr);
1315
1316         if (ENABLE_DISASSEMBLER) {
1317                 pr_debug("Dispatcher block:\n");
1318                 jit_disassemble();
1319         }
1320
1321         /* We're done! */
1322         jit_clear_state();
1323         return block;
1324
1325 err_free_jit:
1326         jit_destroy_state();
1327 err_free_block:
1328         lightrec_free(state, MEM_FOR_IR, sizeof(*block), block);
1329 err_no_mem:
1330         pr_err("Unable to compile dispatcher: Out of memory\n");
1331         return NULL;
1332 }
1333
1334 union code lightrec_read_opcode(struct lightrec_state *state, u32 pc)
1335 {
1336         void *host = NULL;
1337
1338         lightrec_get_map(state, &host, kunseg(pc));
1339
1340         const u32 *code = (u32 *)host;
1341         return (union code) LE32TOH(*code);
1342 }
1343
1344 unsigned int lightrec_cycles_of_opcode(const struct lightrec_state *state,
1345                                        union code code)
1346 {
1347         return state->cycles_per_op;
1348 }
1349
1350 void lightrec_free_opcode_list(struct lightrec_state *state, struct opcode *ops)
1351 {
1352         struct opcode_list *list = container_of(ops, struct opcode_list, ops);
1353
1354         lightrec_free(state, MEM_FOR_IR,
1355                       sizeof(*list) + list->nb_ops * sizeof(struct opcode),
1356                       list);
1357 }
1358
1359 static unsigned int lightrec_get_mips_block_len(const u32 *src)
1360 {
1361         unsigned int i;
1362         union code c;
1363
1364         for (i = 1; ; i++) {
1365                 c.opcode = LE32TOH(*src++);
1366
1367                 if (is_syscall(c))
1368                         return i;
1369
1370                 if (is_unconditional_jump(c))
1371                         return i + 1;
1372         }
1373 }
1374
1375 static struct opcode * lightrec_disassemble(struct lightrec_state *state,
1376                                             const u32 *src, unsigned int *len)
1377 {
1378         struct opcode_list *list;
1379         unsigned int i, length;
1380
1381         length = lightrec_get_mips_block_len(src);
1382
1383         list = lightrec_malloc(state, MEM_FOR_IR,
1384                                sizeof(*list) + sizeof(struct opcode) * length);
1385         if (!list) {
1386                 pr_err("Unable to allocate memory\n");
1387                 return NULL;
1388         }
1389
1390         list->nb_ops = (u16) length;
1391
1392         for (i = 0; i < length; i++) {
1393                 list->ops[i].opcode = LE32TOH(src[i]);
1394                 list->ops[i].flags = 0;
1395         }
1396
1397         *len = length * sizeof(u32);
1398
1399         return list->ops;
1400 }
1401
1402 static struct block * lightrec_precompile_block(struct lightrec_state *state,
1403                                                 u32 pc)
1404 {
1405         struct opcode *list;
1406         struct block *block;
1407         void *host, *addr;
1408         const struct lightrec_mem_map *map = lightrec_get_map(state, &host, kunseg(pc));
1409         const u32 *code = (u32 *) host;
1410         unsigned int length;
1411         bool fully_tagged;
1412         u8 block_flags = 0;
1413
1414         if (!map)
1415                 return NULL;
1416
1417         block = lightrec_malloc(state, MEM_FOR_IR, sizeof(*block));
1418         if (!block) {
1419                 pr_err("Unable to recompile block: Out of memory\n");
1420                 return NULL;
1421         }
1422
1423         list = lightrec_disassemble(state, code, &length);
1424         if (!list) {
1425                 lightrec_free(state, MEM_FOR_IR, sizeof(*block), block);
1426                 return NULL;
1427         }
1428
1429         block->pc = pc;
1430         block->_jit = NULL;
1431         block->function = NULL;
1432         block->opcode_list = list;
1433         block->code = code;
1434         block->next = NULL;
1435         block->flags = 0;
1436         block->code_size = 0;
1437         block->precompile_date = state->current_cycle;
1438         block->nb_ops = length / sizeof(u32);
1439
1440         lightrec_optimize(state, block);
1441
1442         length = block->nb_ops * sizeof(u32);
1443
1444         lightrec_register(MEM_FOR_MIPS_CODE, length);
1445
1446         if (ENABLE_DISASSEMBLER) {
1447                 pr_debug("Disassembled block at "PC_FMT"\n", block->pc);
1448                 lightrec_print_disassembly(block, code);
1449         }
1450
1451         pr_debug("Block size: %hu opcodes\n", block->nb_ops);
1452
1453         fully_tagged = lightrec_block_is_fully_tagged(block);
1454         if (fully_tagged)
1455                 block_flags |= BLOCK_FULLY_TAGGED;
1456
1457         if (block_flags)
1458                 block_set_flags(block, block_flags);
1459
1460         block->hash = lightrec_calculate_block_hash(block);
1461
1462         if (OPT_REPLACE_MEMSET && block_has_flag(block, BLOCK_IS_MEMSET))
1463                 addr = state->memset_func;
1464         else
1465                 addr = state->get_next_block;
1466         lut_write(state, lut_offset(pc), addr);
1467
1468         pr_debug("Blocks created: %u\n", ++state->nb_precompile);
1469
1470         return block;
1471 }
1472
1473 static bool lightrec_block_is_fully_tagged(const struct block *block)
1474 {
1475         const struct opcode *op;
1476         unsigned int i;
1477
1478         for (i = 0; i < block->nb_ops; i++) {
1479                 op = &block->opcode_list[i];
1480
1481                 /* If we have one branch that must be emulated, we cannot trash
1482                  * the opcode list. */
1483                 if (should_emulate(op))
1484                         return false;
1485
1486                 /* Check all loads/stores of the opcode list and mark the
1487                  * block as fully compiled if they all have been tagged. */
1488                 switch (op->c.i.op) {
1489                 case OP_LB:
1490                 case OP_LH:
1491                 case OP_LWL:
1492                 case OP_LW:
1493                 case OP_LBU:
1494                 case OP_LHU:
1495                 case OP_LWR:
1496                 case OP_SB:
1497                 case OP_SH:
1498                 case OP_SWL:
1499                 case OP_SW:
1500                 case OP_SWR:
1501                 case OP_LWC2:
1502                 case OP_SWC2:
1503                 case OP_META_LWU:
1504                 case OP_META_SWU:
1505                         if (!LIGHTREC_FLAGS_GET_IO_MODE(op->flags))
1506                                 return false;
1507                         fallthrough;
1508                 default:
1509                         continue;
1510                 }
1511         }
1512
1513         return true;
1514 }
1515
1516 static void lightrec_reap_block(struct lightrec_state *state, void *data)
1517 {
1518         struct block *block = data;
1519
1520         pr_debug("Reap dead block at "PC_FMT"\n", block->pc);
1521         lightrec_unregister_block(state->block_cache, block);
1522         lightrec_free_block(state, block);
1523 }
1524
1525 static void lightrec_reap_jit(struct lightrec_state *state, void *data)
1526 {
1527         _jit_destroy_state(data);
1528 }
1529
1530 static void lightrec_free_function(struct lightrec_state *state, void *fn)
1531 {
1532         if (ENABLE_CODE_BUFFER && state->tlsf) {
1533                 pr_debug("Freeing code block at 0x%" PRIxPTR "\n", (uintptr_t) fn);
1534                 lightrec_free_code(state, fn);
1535         }
1536 }
1537
1538 static void lightrec_reap_function(struct lightrec_state *state, void *data)
1539 {
1540         lightrec_free_function(state, data);
1541 }
1542
1543 static void lightrec_reap_opcode_list(struct lightrec_state *state, void *data)
1544 {
1545         lightrec_free_opcode_list(state, data);
1546 }
1547
1548 int lightrec_compile_block(struct lightrec_cstate *cstate,
1549                            struct block *block)
1550 {
1551         struct block *dead_blocks[ARRAY_SIZE(cstate->targets)];
1552         u32 was_dead[ARRAY_SIZE(cstate->targets) / 8];
1553         struct lightrec_state *state = cstate->state;
1554         struct lightrec_branch_target *target;
1555         bool fully_tagged = false;
1556         struct block *block2;
1557         struct opcode *elm;
1558         jit_state_t *_jit, *oldjit;
1559         jit_node_t *start_of_block;
1560         bool skip_next = false;
1561         void *old_fn, *new_fn;
1562         size_t old_code_size;
1563         unsigned int i, j;
1564         u8 old_flags;
1565         u32 offset;
1566
1567         fully_tagged = lightrec_block_is_fully_tagged(block);
1568         if (fully_tagged)
1569                 block_set_flags(block, BLOCK_FULLY_TAGGED);
1570
1571         _jit = jit_new_state();
1572         if (!_jit)
1573                 return -ENOMEM;
1574
1575         oldjit = block->_jit;
1576         old_fn = block->function;
1577         old_code_size = block->code_size;
1578         block->_jit = _jit;
1579
1580         lightrec_regcache_reset(cstate->reg_cache);
1581
1582         if (OPT_PRELOAD_PC && (block->flags & BLOCK_PRELOAD_PC))
1583                 lightrec_preload_pc(cstate->reg_cache, _jit);
1584
1585         cstate->cycles = 0;
1586         cstate->nb_local_branches = 0;
1587         cstate->nb_targets = 0;
1588         cstate->no_load_delay = false;
1589
1590         jit_prolog();
1591         jit_tramp(256);
1592
1593         start_of_block = jit_label();
1594
1595         for (i = 0; i < block->nb_ops; i++) {
1596                 elm = &block->opcode_list[i];
1597
1598                 if (skip_next) {
1599                         skip_next = false;
1600                         continue;
1601                 }
1602
1603                 if (should_emulate(elm)) {
1604                         pr_debug("Branch at offset 0x%x will be emulated\n",
1605                                  i << 2);
1606
1607                         lightrec_emit_jump_to_interpreter(cstate, block, i);
1608                         skip_next = !op_flag_no_ds(elm->flags);
1609                 } else {
1610                         lightrec_rec_opcode(cstate, block, i);
1611                         skip_next = !op_flag_no_ds(elm->flags) && has_delay_slot(elm->c);
1612 #if _WIN32
1613                         /* FIXME: GNU Lightning on Windows seems to use our
1614                          * mapped registers as temporaries. Until the actual bug
1615                          * is found and fixed, unconditionally mark our
1616                          * registers as live here. */
1617                         lightrec_regcache_mark_live(cstate->reg_cache, _jit);
1618 #endif
1619                 }
1620
1621                 cstate->cycles += lightrec_cycles_of_opcode(state, elm->c);
1622         }
1623
1624         for (i = 0; i < cstate->nb_local_branches; i++) {
1625                 struct lightrec_branch *branch = &cstate->local_branches[i];
1626
1627                 pr_debug("Patch local branch to offset 0x%x\n",
1628                          branch->target << 2);
1629
1630                 if (branch->target == 0) {
1631                         jit_patch_at(branch->branch, start_of_block);
1632                         continue;
1633                 }
1634
1635                 for (j = 0; j < cstate->nb_targets; j++) {
1636                         if (cstate->targets[j].offset == branch->target) {
1637                                 jit_patch_at(branch->branch,
1638                                              cstate->targets[j].label);
1639                                 break;
1640                         }
1641                 }
1642
1643                 if (j == cstate->nb_targets)
1644                         pr_err("Unable to find branch target\n");
1645         }
1646
1647         jit_ret();
1648         jit_epilog();
1649
1650         new_fn = lightrec_emit_code(state, block, _jit, &block->code_size);
1651         if (!new_fn) {
1652                 if (!ENABLE_THREADED_COMPILER)
1653                         pr_err("Unable to compile block!\n");
1654                 block->_jit = oldjit;
1655                 jit_clear_state();
1656                 _jit_destroy_state(_jit);
1657                 return -ENOMEM;
1658         }
1659
1660         /* Pause the reaper, because lightrec_reset_lut_offset() may try to set
1661          * the old block->function pointer to the code LUT. */
1662         if (ENABLE_THREADED_COMPILER)
1663                 lightrec_reaper_pause(state->reaper);
1664
1665         block->function = new_fn;
1666         block_clear_flags(block, BLOCK_SHOULD_RECOMPILE);
1667
1668         /* Add compiled function to the LUT */
1669         lut_write(state, lut_offset(block->pc), block->function);
1670
1671         /* Detect old blocks that have been covered by the new one */
1672         for (i = 0; ENABLE_THREADED_COMPILER && i < cstate->nb_targets; i++) {
1673                 target = &cstate->targets[i];
1674
1675                 if (!target->offset)
1676                         continue;
1677
1678                 offset = block->pc + target->offset * sizeof(u32);
1679
1680                 block2 = lightrec_find_block(state->block_cache, offset);
1681                 if (block2) {
1682                         /* No need to check if block2 is compilable - it must
1683                          * be, otherwise block wouldn't be compilable either */
1684
1685                         /* Set the "block dead" flag to prevent the dynarec from
1686                          * recompiling this block */
1687                         old_flags = block_set_flags(block2, BLOCK_IS_DEAD);
1688
1689                         if (old_flags & BLOCK_IS_DEAD)
1690                                 was_dead[i / 32] |= BIT(i % 32);
1691                         else
1692                                 was_dead[i / 32] &= ~BIT(i % 32);
1693                 }
1694
1695                 dead_blocks[i] = block2;
1696
1697                 /* If block2 was pending for compilation, cancel it.
1698                  * If it's being compiled right now, wait until it finishes. */
1699                 if (block2)
1700                         lightrec_recompiler_remove(state->rec, block2);
1701         }
1702
1703         for (i = 0; i < cstate->nb_targets; i++) {
1704                 target = &cstate->targets[i];
1705
1706                 if (!target->offset)
1707                         continue;
1708
1709                 /* We know from now on that block2 (if present) isn't going to
1710                  * be compiled. We can override the LUT entry with our new
1711                  * block's entry point. */
1712                 offset = lut_offset(block->pc) + target->offset;
1713                 lut_write(state, offset, jit_address(target->label));
1714
1715                 if (ENABLE_THREADED_COMPILER) {
1716                         block2 = dead_blocks[i];
1717                 } else {
1718                         offset = block->pc + target->offset * sizeof(u32);
1719                         block2 = lightrec_find_block(state->block_cache, offset);
1720                 }
1721                 if (block2) {
1722                         pr_debug("Reap block "X32_FMT" as it's covered by block "
1723                                  X32_FMT"\n", block2->pc, block->pc);
1724
1725                         /* Finally, reap the block. */
1726                         if (!ENABLE_THREADED_COMPILER) {
1727                                 lightrec_unregister_block(state->block_cache, block2);
1728                                 lightrec_free_block(state, block2);
1729                         } else if (!(was_dead[i / 32] & BIT(i % 32))) {
1730                                 lightrec_reaper_add(state->reaper,
1731                                                     lightrec_reap_block,
1732                                                     block2);
1733                         }
1734                 }
1735         }
1736
1737         if (ENABLE_THREADED_COMPILER)
1738                 lightrec_reaper_continue(state->reaper);
1739
1740         if (ENABLE_DISASSEMBLER) {
1741                 pr_debug("Compiling block at "PC_FMT"\n", block->pc);
1742                 jit_disassemble();
1743         }
1744
1745         jit_clear_state();
1746
1747         if (fully_tagged)
1748                 old_flags = block_set_flags(block, BLOCK_NO_OPCODE_LIST);
1749
1750         if (fully_tagged && !(old_flags & BLOCK_NO_OPCODE_LIST)) {
1751                 pr_debug("Block "PC_FMT" is fully tagged"
1752                          " - free opcode list\n", block->pc);
1753
1754                 if (ENABLE_THREADED_COMPILER) {
1755                         lightrec_reaper_add(state->reaper,
1756                                             lightrec_reap_opcode_list,
1757                                             block->opcode_list);
1758                 } else {
1759                         lightrec_free_opcode_list(state, block->opcode_list);
1760                 }
1761         }
1762
1763         if (oldjit) {
1764                 pr_debug("Block "X32_FMT" recompiled, reaping old jit context.\n",
1765                          block->pc);
1766
1767                 if (ENABLE_THREADED_COMPILER) {
1768                         lightrec_reaper_add(state->reaper,
1769                                             lightrec_reap_jit, oldjit);
1770                         lightrec_reaper_add(state->reaper,
1771                                             lightrec_reap_function, old_fn);
1772                 } else {
1773                         _jit_destroy_state(oldjit);
1774                         lightrec_free_function(state, old_fn);
1775                 }
1776
1777                 lightrec_unregister(MEM_FOR_CODE, old_code_size);
1778         }
1779
1780         pr_debug("Blocks compiled: %u\n", ++state->nb_compile);
1781
1782         return 0;
1783 }
1784
1785 static void lightrec_print_info(struct lightrec_state *state)
1786 {
1787         if ((state->current_cycle & ~0xfffffff) != state->old_cycle_counter) {
1788                 pr_info("Lightrec RAM usage: IR %u KiB, CODE %u KiB, "
1789                         "MIPS %u KiB, TOTAL %u KiB, avg. IPI %f\n",
1790                         lightrec_get_mem_usage(MEM_FOR_IR) / 1024,
1791                         lightrec_get_mem_usage(MEM_FOR_CODE) / 1024,
1792                         lightrec_get_mem_usage(MEM_FOR_MIPS_CODE) / 1024,
1793                         lightrec_get_total_mem_usage() / 1024,
1794                        lightrec_get_average_ipi());
1795                 state->old_cycle_counter = state->current_cycle & ~0xfffffff;
1796         }
1797 }
1798
1799 u32 lightrec_execute(struct lightrec_state *state, u32 pc, u32 target_cycle)
1800 {
1801         s32 (*func)(struct lightrec_state *, u32, void *, s32) = (void *)state->dispatcher->function;
1802         void *block_trace;
1803         s32 cycles_delta;
1804
1805         state->exit_flags = LIGHTREC_EXIT_NORMAL;
1806
1807         /* Handle the cycle counter overflowing */
1808         if (unlikely(target_cycle < state->current_cycle))
1809                 target_cycle = UINT_MAX;
1810
1811         state->target_cycle = target_cycle;
1812         state->curr_pc = pc;
1813
1814         block_trace = get_next_block_func(state, pc);
1815         if (block_trace) {
1816                 cycles_delta = state->target_cycle - state->current_cycle;
1817
1818                 cycles_delta = (*func)(state, state->curr_pc,
1819                                        block_trace, cycles_delta);
1820
1821                 state->current_cycle = state->target_cycle - cycles_delta;
1822         }
1823
1824         if (ENABLE_THREADED_COMPILER)
1825                 lightrec_reaper_reap(state->reaper);
1826
1827         if (LOG_LEVEL >= INFO_L)
1828                 lightrec_print_info(state);
1829
1830         return state->curr_pc;
1831 }
1832
1833 u32 lightrec_run_interpreter(struct lightrec_state *state, u32 pc,
1834                              u32 target_cycle)
1835 {
1836         struct block *block;
1837
1838         state->exit_flags = LIGHTREC_EXIT_NORMAL;
1839         state->target_cycle = target_cycle;
1840
1841         do {
1842                 block = lightrec_get_block(state, pc);
1843                 if (!block)
1844                         break;
1845
1846                 pc = lightrec_emulate_block(state, block, pc);
1847
1848                 if (ENABLE_THREADED_COMPILER)
1849                         lightrec_reaper_reap(state->reaper);
1850         } while (state->current_cycle < state->target_cycle);
1851
1852         if (LOG_LEVEL >= INFO_L)
1853                 lightrec_print_info(state);
1854
1855         return pc;
1856 }
1857
1858 void lightrec_free_block(struct lightrec_state *state, struct block *block)
1859 {
1860         u8 old_flags;
1861
1862         lightrec_unregister(MEM_FOR_MIPS_CODE, block->nb_ops * sizeof(u32));
1863         old_flags = block_set_flags(block, BLOCK_NO_OPCODE_LIST);
1864
1865         if (!(old_flags & BLOCK_NO_OPCODE_LIST))
1866                 lightrec_free_opcode_list(state, block->opcode_list);
1867         if (block->_jit)
1868                 _jit_destroy_state(block->_jit);
1869         if (block->function) {
1870                 lightrec_free_function(state, block->function);
1871                 lightrec_unregister(MEM_FOR_CODE, block->code_size);
1872         }
1873         lightrec_free(state, MEM_FOR_IR, sizeof(*block), block);
1874 }
1875
1876 struct lightrec_cstate * lightrec_create_cstate(struct lightrec_state *state)
1877 {
1878         struct lightrec_cstate *cstate;
1879
1880         cstate = lightrec_malloc(state, MEM_FOR_LIGHTREC, sizeof(*cstate));
1881         if (!cstate)
1882                 return NULL;
1883
1884         cstate->reg_cache = lightrec_regcache_init(state);
1885         if (!cstate->reg_cache) {
1886                 lightrec_free(state, MEM_FOR_LIGHTREC, sizeof(*cstate), cstate);
1887                 return NULL;
1888         }
1889
1890         cstate->state = state;
1891
1892         return cstate;
1893 }
1894
1895 void lightrec_free_cstate(struct lightrec_cstate *cstate)
1896 {
1897         lightrec_free_regcache(cstate->reg_cache);
1898         lightrec_free(cstate->state, MEM_FOR_LIGHTREC, sizeof(*cstate), cstate);
1899 }
1900
1901 struct lightrec_state * lightrec_init(char *argv0,
1902                                       const struct lightrec_mem_map *maps,
1903                                       size_t nb,
1904                                       const struct lightrec_ops *ops)
1905 {
1906         const struct lightrec_mem_map *codebuf_map = &maps[PSX_MAP_CODE_BUFFER];
1907         const struct lightrec_mem_map *map;
1908         struct lightrec_state *state;
1909         uintptr_t addr;
1910         void *tlsf = NULL;
1911         bool with_32bit_lut = false;
1912         size_t lut_size;
1913
1914         /* Sanity-check ops */
1915         if (!ops || !ops->cop2_op || !ops->enable_ram) {
1916                 pr_err("Missing callbacks in lightrec_ops structure\n");
1917                 return NULL;
1918         }
1919
1920         if (ops->cop2_notify)
1921                 pr_debug("Optional cop2_notify callback in lightrec_ops\n");
1922         else
1923                 pr_debug("No optional cop2_notify callback in lightrec_ops\n");
1924
1925         if (ENABLE_CODE_BUFFER && nb > PSX_MAP_CODE_BUFFER
1926             && codebuf_map->address) {
1927                 tlsf = tlsf_create_with_pool(codebuf_map->address,
1928                                              codebuf_map->length);
1929                 if (!tlsf) {
1930                         pr_err("Unable to initialize code buffer\n");
1931                         return NULL;
1932                 }
1933
1934                 if (__WORDSIZE == 64) {
1935                         addr = (uintptr_t) codebuf_map->address + codebuf_map->length - 1;
1936                         with_32bit_lut = addr == (u32) addr;
1937                 }
1938         }
1939
1940         if (with_32bit_lut)
1941                 lut_size = CODE_LUT_SIZE * 4;
1942         else
1943                 lut_size = CODE_LUT_SIZE * sizeof(void *);
1944
1945         init_jit_with_debug(argv0, stdout);
1946
1947         state = calloc(1, sizeof(*state) + lut_size);
1948         if (!state)
1949                 goto err_finish_jit;
1950
1951         lightrec_register(MEM_FOR_LIGHTREC, sizeof(*state) + lut_size);
1952
1953         state->tlsf = tlsf;
1954         state->with_32bit_lut = with_32bit_lut;
1955         state->in_delay_slot_n = 0xff;
1956         state->cycles_per_op = 2;
1957
1958         state->block_cache = lightrec_blockcache_init(state);
1959         if (!state->block_cache)
1960                 goto err_free_state;
1961
1962         if (ENABLE_THREADED_COMPILER) {
1963                 state->rec = lightrec_recompiler_init(state);
1964                 if (!state->rec)
1965                         goto err_free_block_cache;
1966
1967                 state->reaper = lightrec_reaper_init(state);
1968                 if (!state->reaper)
1969                         goto err_free_recompiler;
1970         } else {
1971                 state->cstate = lightrec_create_cstate(state);
1972                 if (!state->cstate)
1973                         goto err_free_block_cache;
1974         }
1975
1976         state->nb_maps = nb;
1977         state->maps = maps;
1978
1979         memcpy(&state->ops, ops, sizeof(*ops));
1980
1981         state->dispatcher = generate_dispatcher(state);
1982         if (!state->dispatcher)
1983                 goto err_free_reaper;
1984
1985         state->c_wrapper_block = generate_wrapper(state);
1986         if (!state->c_wrapper_block)
1987                 goto err_free_dispatcher;
1988
1989         state->c_wrappers[C_WRAPPER_RW] = lightrec_rw_cb;
1990         state->c_wrappers[C_WRAPPER_RW_GENERIC] = lightrec_rw_generic_cb;
1991         state->c_wrappers[C_WRAPPER_MFC] = lightrec_mfc_cb;
1992         state->c_wrappers[C_WRAPPER_MTC] = lightrec_mtc_cb;
1993         state->c_wrappers[C_WRAPPER_CP] = lightrec_cp_cb;
1994
1995         map = &maps[PSX_MAP_BIOS];
1996         state->offset_bios = (uintptr_t)map->address - map->pc;
1997
1998         map = &maps[PSX_MAP_SCRATCH_PAD];
1999         state->offset_scratch = (uintptr_t)map->address - map->pc;
2000
2001         map = &maps[PSX_MAP_HW_REGISTERS];
2002         state->offset_io = (uintptr_t)map->address - map->pc;
2003
2004         map = &maps[PSX_MAP_KERNEL_USER_RAM];
2005         state->offset_ram = (uintptr_t)map->address - map->pc;
2006
2007         if (maps[PSX_MAP_MIRROR1].address == map->address + 0x200000 &&
2008             maps[PSX_MAP_MIRROR2].address == map->address + 0x400000 &&
2009             maps[PSX_MAP_MIRROR3].address == map->address + 0x600000)
2010                 state->mirrors_mapped = true;
2011
2012         if (state->offset_bios == 0 &&
2013             state->offset_scratch == 0 &&
2014             state->offset_ram == 0 &&
2015             state->offset_io == 0 &&
2016             state->mirrors_mapped) {
2017                 pr_info("Memory map is perfect. Emitted code will be best.\n");
2018         } else {
2019                 pr_info("Memory map is sub-par. Emitted code will be slow.\n");
2020         }
2021
2022         if (state->with_32bit_lut)
2023                 pr_info("Using 32-bit LUT\n");
2024
2025         return state;
2026
2027 err_free_dispatcher:
2028         lightrec_free_block(state, state->dispatcher);
2029 err_free_reaper:
2030         if (ENABLE_THREADED_COMPILER)
2031                 lightrec_reaper_destroy(state->reaper);
2032 err_free_recompiler:
2033         if (ENABLE_THREADED_COMPILER)
2034                 lightrec_free_recompiler(state->rec);
2035         else
2036                 lightrec_free_cstate(state->cstate);
2037 err_free_block_cache:
2038         lightrec_free_block_cache(state->block_cache);
2039 err_free_state:
2040         lightrec_unregister(MEM_FOR_LIGHTREC, sizeof(*state) +
2041                             lut_elm_size(state) * CODE_LUT_SIZE);
2042         free(state);
2043 err_finish_jit:
2044         finish_jit();
2045         if (ENABLE_CODE_BUFFER && tlsf)
2046                 tlsf_destroy(tlsf);
2047         return NULL;
2048 }
2049
2050 void lightrec_destroy(struct lightrec_state *state)
2051 {
2052         /* Force a print info on destroy*/
2053         state->current_cycle = ~state->current_cycle;
2054         lightrec_print_info(state);
2055
2056         lightrec_free_block_cache(state->block_cache);
2057         lightrec_free_block(state, state->dispatcher);
2058         lightrec_free_block(state, state->c_wrapper_block);
2059
2060         if (ENABLE_THREADED_COMPILER) {
2061                 lightrec_free_recompiler(state->rec);
2062                 lightrec_reaper_destroy(state->reaper);
2063         } else {
2064                 lightrec_free_cstate(state->cstate);
2065         }
2066
2067         finish_jit();
2068         if (ENABLE_CODE_BUFFER && state->tlsf)
2069                 tlsf_destroy(state->tlsf);
2070
2071         lightrec_unregister(MEM_FOR_LIGHTREC, sizeof(*state) +
2072                             lut_elm_size(state) * CODE_LUT_SIZE);
2073         free(state);
2074 }
2075
2076 void lightrec_invalidate(struct lightrec_state *state, u32 addr, u32 len)
2077 {
2078         u32 kaddr = kunseg(addr & ~0x3);
2079         enum psx_map idx = lightrec_get_map_idx(state, kaddr);
2080
2081         switch (idx) {
2082         case PSX_MAP_MIRROR1:
2083         case PSX_MAP_MIRROR2:
2084         case PSX_MAP_MIRROR3:
2085                 /* Handle mirrors */
2086                 kaddr &= RAM_SIZE - 1;
2087                 fallthrough;
2088         case PSX_MAP_KERNEL_USER_RAM:
2089                 break;
2090         default:
2091                 return;
2092         }
2093
2094         memset(lut_address(state, lut_offset(kaddr)), 0,
2095                ((len + 3) / 4) * lut_elm_size(state));
2096 }
2097
2098 void lightrec_invalidate_all(struct lightrec_state *state)
2099 {
2100         memset(state->code_lut, 0, lut_elm_size(state) * CODE_LUT_SIZE);
2101 }
2102
2103 void lightrec_set_unsafe_opt_flags(struct lightrec_state *state, u32 flags)
2104 {
2105         if ((flags ^ state->opt_flags) & LIGHTREC_OPT_INV_DMA_ONLY)
2106                 lightrec_invalidate_all(state);
2107
2108         state->opt_flags = flags;
2109 }
2110
2111 void lightrec_set_exit_flags(struct lightrec_state *state, u32 flags)
2112 {
2113         if (flags != LIGHTREC_EXIT_NORMAL) {
2114                 state->exit_flags |= flags;
2115                 state->target_cycle = state->current_cycle;
2116         }
2117 }
2118
2119 u32 lightrec_exit_flags(struct lightrec_state *state)
2120 {
2121         return state->exit_flags;
2122 }
2123
2124 u32 lightrec_current_cycle_count(const struct lightrec_state *state)
2125 {
2126         return state->current_cycle;
2127 }
2128
2129 void lightrec_reset_cycle_count(struct lightrec_state *state, u32 cycles)
2130 {
2131         state->current_cycle = cycles;
2132
2133         if (state->target_cycle < cycles)
2134                 state->target_cycle = cycles;
2135 }
2136
2137 void lightrec_set_target_cycle_count(struct lightrec_state *state, u32 cycles)
2138 {
2139         if (state->exit_flags == LIGHTREC_EXIT_NORMAL) {
2140                 if (cycles < state->current_cycle)
2141                         cycles = state->current_cycle;
2142
2143                 state->target_cycle = cycles;
2144         }
2145 }
2146
2147 struct lightrec_registers * lightrec_get_registers(struct lightrec_state *state)
2148 {
2149         return &state->regs;
2150 }
2151
2152 void lightrec_set_cycles_per_opcode(struct lightrec_state *state, u32 cycles)
2153 {
2154         if (state->cycles_per_op == cycles)
2155                 return;
2156
2157         state->cycles_per_op = cycles;
2158
2159         if (ENABLE_THREADED_COMPILER) {
2160                 lightrec_recompiler_pause(state->rec);
2161                 lightrec_reaper_reap(state->reaper);
2162         }
2163
2164         lightrec_invalidate_all(state);
2165         lightrec_free_all_blocks(state->block_cache);
2166
2167         if (ENABLE_THREADED_COMPILER)
2168                 lightrec_recompiler_unpause(state->rec);
2169 }