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_default_sb(struct lightrec_state *state, u32 opcode,
  39                                 void *host, u32 addr, u8 data)
  40 {
  41         *(u8 *)host = data;
  42
  43         if (!state->invalidate_from_dma_only)
  44                 lightrec_invalidate(state, addr, 1);
  45 }
  46
  47 static void lightrec_default_sh(struct lightrec_state *state, u32 opcode,
  48                                 void *host, u32 addr, u16 data)
  49 {
  50         *(u16 *)host = HTOLE16(data);
  51
  52         if (!state->invalidate_from_dma_only)
  53                 lightrec_invalidate(state, addr, 2);
  54 }
  55
  56 static void lightrec_default_sw(struct lightrec_state *state, u32 opcode,
  57                                 void *host, u32 addr, u32 data)
  58 {
  59         *(u32 *)host = HTOLE32(data);
  60
  61         if (!state->invalidate_from_dma_only)
  62                 lightrec_invalidate(state, addr, 4);
  63 }
  64
  65 static u8 lightrec_default_lb(struct lightrec_state *state,
  66                               u32 opcode, void *host, u32 addr)
  67 {
  68         return *(u8 *)host;
  69 }
  70
  71 static u16 lightrec_default_lh(struct lightrec_state *state,
  72                                u32 opcode, void *host, u32 addr)
  73 {
  74         return LE16TOH(*(u16 *)host);
  75 }
  76
  77 static u32 lightrec_default_lw(struct lightrec_state *state,
  78                                u32 opcode, void *host, u32 addr)
  79 {
  80         return LE32TOH(*(u32 *)host);
  81 }
  82
  83 static const struct lightrec_mem_map_ops lightrec_default_ops = {
  84         .sb = lightrec_default_sb,
  85         .sh = lightrec_default_sh,
  86         .sw = lightrec_default_sw,
  87         .lb = lightrec_default_lb,
  88         .lh = lightrec_default_lh,
  89         .lw = lightrec_default_lw,
  90 };
  91
  92 static void __segfault_cb(struct lightrec_state *state, u32 addr,
  93                           const struct block *block)
  94 {
  95         lightrec_set_exit_flags(state, LIGHTREC_EXIT_SEGFAULT);
  96         pr_err("Segmentation fault in recompiled code: invalid "
  97                "load/store at address 0x%08x\n", addr);
  98         if (block)
  99                 pr_err("Was executing block PC 0x%08x\n", block->pc);
 100 }
 101
 102 static void lightrec_swl(struct lightrec_state *state,
 103                          const struct lightrec_mem_map_ops *ops,
 104                          u32 opcode, void *host, u32 addr, u32 data)
 105 {
 106         unsigned int shift = addr & 0x3;
 107         unsigned int mask = shift < 3 ? GENMASK(31, (shift + 1) * 8) : 0;
 108         u32 old_data;
 109
 110         /* Align to 32 bits */
 111         addr &= ~3;
 112         host = (void *)((uintptr_t)host & ~3);
 113
 114         old_data = ops->lw(state, opcode, host, addr);
 115
 116         data = (data >> ((3 - shift) * 8)) | (old_data & mask);
 117
 118         ops->sw(state, opcode, host, addr, data);
 119 }
 120
 121 static void lightrec_swr(struct lightrec_state *state,
 122                          const struct lightrec_mem_map_ops *ops,
 123                          u32 opcode, void *host, u32 addr, u32 data)
 124 {
 125         unsigned int shift = addr & 0x3;
 126         unsigned int mask = (1 << (shift * 8)) - 1;
 127         u32 old_data;
 128
 129         /* Align to 32 bits */
 130         addr &= ~3;
 131         host = (void *)((uintptr_t)host & ~3);
 132
 133         old_data = ops->lw(state, opcode, host, addr);
 134
 135         data = (data << (shift * 8)) | (old_data & mask);
 136
 137         ops->sw(state, opcode, host, addr, data);
 138 }
 139
 140 static void lightrec_swc2(struct lightrec_state *state, union code op,
 141                           const struct lightrec_mem_map_ops *ops,
 142                           void *host, u32 addr)
 143 {
 144         u32 data = lightrec_mfc2(state, op.i.rt);
 145
 146         ops->sw(state, op.opcode, host, addr, data);
 147 }
 148
 149 static u32 lightrec_lwl(struct lightrec_state *state,
 150                         const struct lightrec_mem_map_ops *ops,
 151                         u32 opcode, void *host, u32 addr, u32 data)
 152 {
 153         unsigned int shift = addr & 0x3;
 154         unsigned int mask = (1 << (24 - shift * 8)) - 1;
 155         u32 old_data;
 156
 157         /* Align to 32 bits */
 158         addr &= ~3;
 159         host = (void *)((uintptr_t)host & ~3);
 160
 161         old_data = ops->lw(state, opcode, host, addr);
 162
 163         return (data & mask) | (old_data << (24 - shift * 8));
 164 }
 165
 166 static u32 lightrec_lwr(struct lightrec_state *state,
 167                         const struct lightrec_mem_map_ops *ops,
 168                         u32 opcode, void *host, u32 addr, u32 data)
 169 {
 170         unsigned int shift = addr & 0x3;
 171         unsigned int mask = shift ? GENMASK(31, 32 - shift * 8) : 0;
 172         u32 old_data;
 173
 174         /* Align to 32 bits */
 175         addr &= ~3;
 176         host = (void *)((uintptr_t)host & ~3);
 177
 178         old_data = ops->lw(state, opcode, host, addr);
 179
 180         return (data & mask) | (old_data >> (shift * 8));
 181 }
 182
 183 static void lightrec_lwc2(struct lightrec_state *state, union code op,
 184                           const struct lightrec_mem_map_ops *ops,
 185                           void *host, u32 addr)
 186 {
 187         u32 data = ops->lw(state, op.opcode, host, addr);
 188
 189         lightrec_mtc2(state, op.i.rt, data);
 190 }
 191
 192 static void lightrec_invalidate_map(struct lightrec_state *state,
 193                 const struct lightrec_mem_map *map, u32 addr, u32 len)
 194 {
 195         if (map == &state->maps[PSX_MAP_KERNEL_USER_RAM]) {
 196                 memset(lut_address(state, lut_offset(addr)), 0,
 197                        ((len + 3) / 4) * lut_elm_size(state));
 198         }
 199 }
 200
 201 static enum psx_map
 202 lightrec_get_map_idx(struct lightrec_state *state, u32 kaddr)
 203 {
 204         const struct lightrec_mem_map *map;
 205         unsigned int i;
 206
 207         for (i = 0; i < state->nb_maps; i++) {
 208                 map = &state->maps[i];
 209
 210                 if (kaddr >= map->pc && kaddr < map->pc + map->length)
 211                         return (enum psx_map) i;
 212         }
 213
 214         return PSX_MAP_UNKNOWN;
 215 }
 216
 217 const struct lightrec_mem_map *
 218 lightrec_get_map(struct lightrec_state *state, void **host, u32 kaddr)
 219 {
 220         const struct lightrec_mem_map *map;
 221         enum psx_map idx;
 222         u32 addr;
 223
 224         idx = lightrec_get_map_idx(state, kaddr);
 225         if (idx == PSX_MAP_UNKNOWN)
 226                 return NULL;
 227
 228         map = &state->maps[idx];
 229         addr = kaddr - map->pc;
 230
 231         while (map->mirror_of)
 232                 map = map->mirror_of;
 233
 234         if (host)
 235                 *host = map->address + addr;
 236
 237         return map;
 238 }
 239
 240 u32 lightrec_rw(struct lightrec_state *state, union code op, u32 base,
 241                 u32 data, u32 *flags, struct block *block, u16 offset)
 242 {
 243         const struct lightrec_mem_map *map;
 244         const struct lightrec_mem_map_ops *ops;
 245         u32 opcode = op.opcode;
 246         bool was_tagged = true;
 247         u16 old_flags;
 248         u32 addr;
 249         void *host;
 250
 251         addr = kunseg(base + (s16) op.i.imm);
 252
 253         map = lightrec_get_map(state, &host, addr);
 254         if (!map) {
 255                 __segfault_cb(state, addr, block);
 256                 return 0;
 257         }
 258
 259         if (flags)
 260                 was_tagged = LIGHTREC_FLAGS_GET_IO_MODE(*flags);
 261
 262         if (likely(!map->ops)) {
 263                 if (flags && !LIGHTREC_FLAGS_GET_IO_MODE(*flags)) {
 264                         /* Force parallel port accesses as HW accesses, because
 265                          * the direct-I/O emitters can't differenciate it. */
 266                         if (unlikely(map == &state->maps[PSX_MAP_PARALLEL_PORT]))
 267                                 *flags |= LIGHTREC_IO_MODE(LIGHTREC_IO_HW);
 268                         /* If the base register is 0x0, be extra suspicious.
 269                          * Some games (e.g. Sled Storm) actually do segmentation
 270                          * faults by using uninitialized pointers, which are
 271                          * later initialized to point to hardware registers. */
 272                         else if (op.i.rs && base == 0x0)
 273                                 *flags |= LIGHTREC_IO_MODE(LIGHTREC_IO_HW);
 274                         else
 275                                 *flags |= LIGHTREC_IO_MODE(LIGHTREC_IO_DIRECT);
 276                 }
 277
 278                 ops = &lightrec_default_ops;
 279         } else if (flags &&
 280                    LIGHTREC_FLAGS_GET_IO_MODE(*flags) == LIGHTREC_IO_DIRECT_HW) {
 281                 ops = &lightrec_default_ops;
 282         } else {
 283                 if (flags && !LIGHTREC_FLAGS_GET_IO_MODE(*flags))
 284                         *flags |= LIGHTREC_IO_MODE(LIGHTREC_IO_HW);
 285
 286                 ops = map->ops;
 287         }
 288
 289         if (!was_tagged) {
 290                 old_flags = block_set_flags(block, BLOCK_SHOULD_RECOMPILE);
 291
 292                 if (!(old_flags & BLOCK_SHOULD_RECOMPILE)) {
 293                         pr_debug("Opcode of block at PC 0x%08x has been tagged"
 294                                  " - flag for recompilation\n", block->pc);
 295
 296                         lut_write(state, lut_offset(block->pc), NULL);
 297                 }
 298         }
 299
 300         switch (op.i.op) {
 301         case OP_SB:
 302                 ops->sb(state, opcode, host, addr, (u8) data);
 303                 return 0;
 304         case OP_SH:
 305                 ops->sh(state, opcode, host, addr, (u16) data);
 306                 return 0;
 307         case OP_SWL:
 308                 lightrec_swl(state, ops, opcode, host, addr, data);
 309                 return 0;
 310         case OP_SWR:
 311                 lightrec_swr(state, ops, opcode, host, addr, data);
 312                 return 0;
 313         case OP_SW:
 314                 ops->sw(state, opcode, host, addr, data);
 315                 return 0;
 316         case OP_SWC2:
 317                 lightrec_swc2(state, op, ops, host, addr);
 318                 return 0;
 319         case OP_LB:
 320                 return (s32) (s8) ops->lb(state, opcode, host, addr);
 321         case OP_LBU:
 322                 return ops->lb(state, opcode, host, addr);
 323         case OP_LH:
 324                 return (s32) (s16) ops->lh(state, opcode, host, addr);
 325         case OP_LHU:
 326                 return ops->lh(state, opcode, host, addr);
 327         case OP_LWC2:
 328                 lightrec_lwc2(state, op, ops, host, addr);
 329                 return 0;
 330         case OP_LWL:
 331                 return lightrec_lwl(state, ops, opcode, host, addr, data);
 332         case OP_LWR:
 333                 return lightrec_lwr(state, ops, opcode, host, addr, data);
 334         case OP_LW:
 335         default:
 336                 return ops->lw(state, opcode, host, addr);
 337         }
 338 }
 339
 340 static void lightrec_rw_helper(struct lightrec_state *state,
 341                                union code op, u32 *flags,
 342                                struct block *block, u16 offset)
 343 {
 344         u32 ret = lightrec_rw(state, op, state->regs.gpr[op.i.rs],
 345                               state->regs.gpr[op.i.rt], flags, block, offset);
 346
 347         switch (op.i.op) {
 348         case OP_LB:
 349         case OP_LBU:
 350         case OP_LH:
 351         case OP_LHU:
 352         case OP_LWL:
 353         case OP_LWR:
 354         case OP_LW:
 355                 if (OPT_HANDLE_LOAD_DELAYS && unlikely(!state->in_delay_slot_n)) {
 356                         state->temp_reg = ret;
 357                         state->in_delay_slot_n = 0xff;
 358                 } else if (op.i.rt) {
 359                         state->regs.gpr[op.i.rt] = ret;
 360                 }
 361                 fallthrough;
 362         default:
 363                 break;
 364         }
 365 }
 366
 367 static void lightrec_rw_cb(struct lightrec_state *state, u32 arg)
 368 {
 369         lightrec_rw_helper(state, (union code) arg, NULL, NULL, 0);
 370 }
 371
 372 static void lightrec_rw_generic_cb(struct lightrec_state *state, u32 arg)
 373 {
 374         struct block *block;
 375         struct opcode *op;
 376         u16 offset = (u16)arg;
 377
 378         block = lightrec_find_block_from_lut(state->block_cache,
 379                                              arg >> 16, state->next_pc);
 380         if (unlikely(!block)) {
 381                 pr_err("rw_generic: No block found in LUT for PC 0x%x offset 0x%x\n",
 382                          state->next_pc, offset);
 383                 lightrec_set_exit_flags(state, LIGHTREC_EXIT_SEGFAULT);
 384                 return;
 385         }
 386
 387         op = &block->opcode_list[offset];
 388         lightrec_rw_helper(state, op->c, &op->flags, block, offset);
 389 }
 390
 391 static u32 clamp_s32(s32 val, s32 min, s32 max)
 392 {
 393         return val < min ? min : val > max ? max : val;
 394 }
 395
 396 static u16 load_u16(u32 *ptr)
 397 {
 398         return ((struct u16x2 *) ptr)->l;
 399 }
 400
 401 static void store_u16(u32 *ptr, u16 value)
 402 {
 403         ((struct u16x2 *) ptr)->l = value;
 404 }
 405
 406 static u32 lightrec_mfc2(struct lightrec_state *state, u8 reg)
 407 {
 408         s16 gteir1, gteir2, gteir3;
 409
 410         switch (reg) {
 411         case 1:
 412         case 3:
 413         case 5:
 414         case 8:
 415         case 9:
 416         case 10:
 417         case 11:
 418                 return (s32)(s16) load_u16(&state->regs.cp2d[reg]);
 419         case 7:
 420         case 16:
 421         case 17:
 422         case 18:
 423         case 19:
 424                 return load_u16(&state->regs.cp2d[reg]);
 425         case 28:
 426         case 29:
 427                 gteir1 = (s16) load_u16(&state->regs.cp2d[9]);
 428                 gteir2 = (s16) load_u16(&state->regs.cp2d[10]);
 429                 gteir3 = (s16) load_u16(&state->regs.cp2d[11]);
 430
 431                 return clamp_s32(gteir1 >> 7, 0, 0x1f) << 0 |
 432                         clamp_s32(gteir2 >> 7, 0, 0x1f) << 5 |
 433                         clamp_s32(gteir3 >> 7, 0, 0x1f) << 10;
 434         case 15:
 435                 reg = 14;
 436                 fallthrough;
 437         default:
 438                 return state->regs.cp2d[reg];
 439         }
 440 }
 441
 442 u32 lightrec_mfc(struct lightrec_state *state, union code op)
 443 {
 444         u32 val;
 445
 446         if (op.i.op == OP_CP0)
 447                 return state->regs.cp0[op.r.rd];
 448
 449         if (op.i.op == OP_SWC2) {
 450                 val = lightrec_mfc2(state, op.i.rt);
 451         } else if (op.r.rs == OP_CP2_BASIC_MFC2)
 452                 val = lightrec_mfc2(state, op.r.rd);
 453         else {
 454                 val = state->regs.cp2c[op.r.rd];
 455
 456                 switch (op.r.rd) {
 457                 case 4:
 458                 case 12:
 459                 case 20:
 460                 case 26:
 461                 case 27:
 462                 case 29:
 463                 case 30:
 464                         val = (u32)(s16)val;
 465                         fallthrough;
 466                 default:
 467                         break;
 468                 }
 469         }
 470
 471         if (state->ops.cop2_notify)
 472                 (*state->ops.cop2_notify)(state, op.opcode, val);
 473
 474         return val;
 475 }
 476
 477 static void lightrec_mfc_cb(struct lightrec_state *state, union code op)
 478 {
 479         u32 rt = lightrec_mfc(state, op);
 480
 481         if (op.i.op == OP_SWC2)
 482                 state->temp_reg = rt;
 483         else if (op.r.rt)
 484                 state->regs.gpr[op.r.rt] = rt;
 485 }
 486
 487 static void lightrec_mtc0(struct lightrec_state *state, u8 reg, u32 data)
 488 {
 489         u32 status, oldstatus, cause;
 490
 491         switch (reg) {
 492         case 1:
 493         case 4:
 494         case 8:
 495         case 14:
 496         case 15:
 497                 /* Those registers are read-only */
 498                 return;
 499         default:
 500                 break;
 501         }
 502
 503         if (reg == 12) {
 504                 status = state->regs.cp0[12];
 505                 oldstatus = status;
 506
 507                 if (status & ~data & BIT(16)) {
 508                         state->ops.enable_ram(state, true);
 509                         lightrec_invalidate_all(state);
 510                 } else if (~status & data & BIT(16)) {
 511                         state->ops.enable_ram(state, false);
 512                 }
 513         }
 514
 515         if (reg == 13) {
 516                 state->regs.cp0[13] &= ~0x300;
 517                 state->regs.cp0[13] |= data & 0x300;
 518         } else {
 519                 state->regs.cp0[reg] = data;
 520         }
 521
 522         if (reg == 12 || reg == 13) {
 523                 cause = state->regs.cp0[13];
 524                 status = state->regs.cp0[12];
 525
 526                 /* Handle software interrupts */
 527                 if (!!(status & cause & 0x300) & status)
 528                         lightrec_set_exit_flags(state, LIGHTREC_EXIT_CHECK_INTERRUPT);
 529
 530                 /* Handle hardware interrupts */
 531                 if (reg == 12 && !(~status & 0x401) && (~oldstatus & 0x401))
 532                         lightrec_set_exit_flags(state, LIGHTREC_EXIT_CHECK_INTERRUPT);
 533         }
 534 }
 535
 536 static u32 count_leading_bits(s32 data)
 537 {
 538         u32 cnt = 33;
 539
 540 #ifdef __has_builtin
 541 #if __has_builtin(__builtin_clrsb)
 542         return 1 + __builtin_clrsb(data);
 543 #endif
 544 #endif
 545
 546         data = (data ^ (data >> 31)) << 1;
 547
 548         do {
 549                 cnt -= 1;
 550                 data >>= 1;
 551         } while (data);
 552
 553         return cnt;
 554 }
 555
 556 static void lightrec_mtc2(struct lightrec_state *state, u8 reg, u32 data)
 557 {
 558         switch (reg) {
 559         case 15:
 560                 state->regs.cp2d[12] = state->regs.cp2d[13];
 561                 state->regs.cp2d[13] = state->regs.cp2d[14];
 562                 state->regs.cp2d[14] = data;
 563                 break;
 564         case 28:
 565                 state->regs.cp2d[9] = (data << 7) & 0xf80;
 566                 state->regs.cp2d[10] = (data << 2) & 0xf80;
 567                 state->regs.cp2d[11] = (data >> 3) & 0xf80;
 568                 break;
 569         case 31:
 570                 return;
 571         case 30:
 572                 state->regs.cp2d[31] = count_leading_bits((s32) data);
 573                 fallthrough;
 574         default:
 575                 state->regs.cp2d[reg] = data;
 576                 break;
 577         }
 578 }
 579
 580 static void lightrec_ctc2(struct lightrec_state *state, u8 reg, u32 data)
 581 {
 582         switch (reg) {
 583         case 4:
 584         case 12:
 585         case 20:
 586         case 26:
 587         case 27:
 588         case 29:
 589         case 30:
 590                 store_u16(&state->regs.cp2c[reg], data);
 591                 break;
 592         case 31:
 593                 data = (data & 0x7ffff000) | !!(data & 0x7f87e000) << 31;
 594                 fallthrough;
 595         default:
 596                 state->regs.cp2c[reg] = data;
 597                 break;
 598         }
 599 }
 600
 601 void lightrec_mtc(struct lightrec_state *state, union code op, u8 reg, u32 data)
 602 {
 603         if (op.i.op == OP_CP0) {
 604                 lightrec_mtc0(state, reg, data);
 605         } else {
 606                 if (op.i.op == OP_LWC2 || op.r.rs != OP_CP2_BASIC_CTC2)
 607                         lightrec_mtc2(state, reg, data);
 608                 else
 609                         lightrec_ctc2(state, reg, data);
 610
 611                 if (state->ops.cop2_notify)
 612                         (*state->ops.cop2_notify)(state, op.opcode, data);
 613         }
 614 }
 615
 616 static void lightrec_mtc_cb(struct lightrec_state *state, u32 arg)
 617 {
 618         union code op = (union code) arg;
 619         u32 data;
 620         u8 reg;
 621
 622         if (op.i.op == OP_LWC2) {
 623                 data = state->temp_reg;
 624                 reg = op.i.rt;
 625         } else {
 626                 data = state->regs.gpr[op.r.rt];
 627                 reg = op.r.rd;
 628         }
 629
 630         lightrec_mtc(state, op, reg, data);
 631 }
 632
 633 void lightrec_rfe(struct lightrec_state *state)
 634 {
 635         u32 status;
 636
 637         /* Read CP0 Status register (r12) */
 638         status = state->regs.cp0[12];
 639
 640         /* Switch the bits */
 641         status = ((status & 0x3c) >> 2) | (status & ~0xf);
 642
 643         /* Write it back */
 644         lightrec_mtc0(state, 12, status);
 645 }
 646
 647 void lightrec_cp(struct lightrec_state *state, union code op)
 648 {
 649         if (op.i.op == OP_CP0) {
 650                 pr_err("Invalid CP opcode to coprocessor #0\n");
 651                 return;
 652         }
 653
 654         (*state->ops.cop2_op)(state, op.opcode);
 655 }
 656
 657 static void lightrec_cp_cb(struct lightrec_state *state, u32 arg)
 658 {
 659         lightrec_cp(state, (union code) arg);
 660 }
 661
 662 static struct block * lightrec_get_block(struct lightrec_state *state, u32 pc)
 663 {
 664         struct block *block = lightrec_find_block(state->block_cache, pc);
 665         u8 old_flags;
 666
 667         if (block && lightrec_block_is_outdated(state, block)) {
 668                 pr_debug("Block at PC 0x%08x is outdated!\n", block->pc);
 669
 670                 old_flags = block_set_flags(block, BLOCK_IS_DEAD);
 671                 if (!(old_flags & BLOCK_IS_DEAD)) {
 672                         /* Make sure the recompiler isn't processing the block
 673                          * we'll destroy */
 674                         if (ENABLE_THREADED_COMPILER)
 675                                 lightrec_recompiler_remove(state->rec, block);
 676
 677                         lightrec_unregister_block(state->block_cache, block);
 678                         remove_from_code_lut(state->block_cache, block);
 679                         lightrec_free_block(state, block);
 680                 }
 681
 682                 block = NULL;
 683         }
 684
 685         if (!block) {
 686                 block = lightrec_precompile_block(state, pc);
 687                 if (!block) {
 688                         pr_err("Unable to recompile block at PC 0x%x\n", pc);
 689                         lightrec_set_exit_flags(state, LIGHTREC_EXIT_SEGFAULT);
 690                         return NULL;
 691                 }
 692
 693                 lightrec_register_block(state->block_cache, block);
 694         }
 695
 696         return block;
 697 }
 698
 699 static void * get_next_block_func(struct lightrec_state *state, u32 pc)
 700 {
 701         struct block *block;
 702         bool should_recompile;
 703         void *func;
 704         int err;
 705
 706         do {
 707                 func = lut_read(state, lut_offset(pc));
 708                 if (func && func != state->get_next_block)
 709                         break;
 710
 711                 block = lightrec_get_block(state, pc);
 712
 713                 if (unlikely(!block))
 714                         break;
 715
 716                 if (OPT_REPLACE_MEMSET &&
 717                     block_has_flag(block, BLOCK_IS_MEMSET)) {
 718                         func = state->memset_func;
 719                         break;
 720                 }
 721
 722                 should_recompile = block_has_flag(block, BLOCK_SHOULD_RECOMPILE) &&
 723                         !block_has_flag(block, BLOCK_NEVER_COMPILE) &&
 724                         !block_has_flag(block, BLOCK_IS_DEAD);
 725
 726                 if (unlikely(should_recompile)) {
 727                         pr_debug("Block at PC 0x%08x should recompile\n", pc);
 728
 729                         if (ENABLE_THREADED_COMPILER) {
 730                                 lightrec_recompiler_add(state->rec, block);
 731                         } else {
 732                                 err = lightrec_compile_block(state->cstate, block);
 733                                 if (err) {
 734                                         state->exit_flags = LIGHTREC_EXIT_NOMEM;
 735                                         return NULL;
 736                                 }
 737                         }
 738                 }
 739
 740                 if (ENABLE_THREADED_COMPILER && likely(!should_recompile))
 741                         func = lightrec_recompiler_run_first_pass(state, block, &pc);
 742                 else
 743                         func = block->function;
 744
 745                 if (likely(func))
 746                         break;
 747
 748                 if (unlikely(block_has_flag(block, BLOCK_NEVER_COMPILE))) {
 749                         pc = lightrec_emulate_block(state, block, pc);
 750
 751                 } else if (!ENABLE_THREADED_COMPILER) {
 752                         /* Block wasn't compiled yet - run the interpreter */
 753                         if (block_has_flag(block, BLOCK_FULLY_TAGGED))
 754                                 pr_debug("Block fully tagged, skipping first pass\n");
 755                         else if (ENABLE_FIRST_PASS && likely(!should_recompile))
 756                                 pc = lightrec_emulate_block(state, block, pc);
 757
 758                         /* Then compile it using the profiled data */
 759                         err = lightrec_compile_block(state->cstate, block);
 760                         if (err) {
 761                                 state->exit_flags = LIGHTREC_EXIT_NOMEM;
 762                                 return NULL;
 763                         }
 764                 } else if (unlikely(block_has_flag(block, BLOCK_IS_DEAD))) {
 765                         /*
 766                          * If the block is dead but has never been compiled,
 767                          * then its function pointer is NULL and we cannot
 768                          * execute the block. In that case, reap all the dead
 769                          * blocks now, and in the next loop we will create a
 770                          * new block.
 771                          */
 772                         lightrec_reaper_reap(state->reaper);
 773                 } else {
 774                         lightrec_recompiler_add(state->rec, block);
 775                 }
 776         } while (state->exit_flags == LIGHTREC_EXIT_NORMAL
 777                  && state->current_cycle < state->target_cycle);
 778
 779         state->next_pc = pc;
 780         return func;
 781 }
 782
 783 static void * lightrec_alloc_code(struct lightrec_state *state, size_t size)
 784 {
 785         void *code;
 786
 787         if (ENABLE_THREADED_COMPILER)
 788                 lightrec_code_alloc_lock(state);
 789
 790         code = tlsf_malloc(state->tlsf, size);
 791
 792         if (ENABLE_THREADED_COMPILER)
 793                 lightrec_code_alloc_unlock(state);
 794
 795         return code;
 796 }
 797
 798 static void lightrec_realloc_code(struct lightrec_state *state,
 799                                   void *ptr, size_t size)
 800 {
 801         /* NOTE: 'size' MUST be smaller than the size specified during
 802          * the allocation. */
 803
 804         if (ENABLE_THREADED_COMPILER)
 805                 lightrec_code_alloc_lock(state);
 806
 807         tlsf_realloc(state->tlsf, ptr, size);
 808
 809         if (ENABLE_THREADED_COMPILER)
 810                 lightrec_code_alloc_unlock(state);
 811 }
 812
 813 static void lightrec_free_code(struct lightrec_state *state, void *ptr)
 814 {
 815         if (ENABLE_THREADED_COMPILER)
 816                 lightrec_code_alloc_lock(state);
 817
 818         tlsf_free(state->tlsf, ptr);
 819
 820         if (ENABLE_THREADED_COMPILER)
 821                 lightrec_code_alloc_unlock(state);
 822 }
 823
 824 static char lightning_code_data[0x80000];
 825
 826 static void * lightrec_emit_code(struct lightrec_state *state,
 827                                  const struct block *block,
 828                                  jit_state_t *_jit, unsigned int *size)
 829 {
 830         bool has_code_buffer = ENABLE_CODE_BUFFER && state->tlsf;
 831         jit_word_t code_size, new_code_size;
 832         void *code;
 833
 834         jit_realize();
 835
 836         if (ENABLE_DISASSEMBLER)
 837                 jit_set_data(lightning_code_data, sizeof(lightning_code_data), 0);
 838         else
 839                 jit_set_data(NULL, 0, JIT_DISABLE_DATA | JIT_DISABLE_NOTE);
 840
 841         if (has_code_buffer) {
 842                 jit_get_code(&code_size);
 843                 code = lightrec_alloc_code(state, (size_t) code_size);
 844
 845                 if (!code) {
 846                         if (ENABLE_THREADED_COMPILER) {
 847                                 /* If we're using the threaded compiler, return
 848                                  * an allocation error here. The threaded
 849                                  * compiler will then empty its job queue and
 850                                  * request a code flush using the reaper. */
 851                                 return NULL;
 852                         }
 853
 854                         /* Remove outdated blocks, and try again */
 855                         lightrec_remove_outdated_blocks(state->block_cache, block);
 856
 857                         pr_debug("Re-try to alloc %zu bytes...\n", code_size);
 858
 859                         code = lightrec_alloc_code(state, code_size);
 860                         if (!code) {
 861                                 pr_err("Could not alloc even after removing old blocks!\n");
 862                                 return NULL;
 863                         }
 864                 }
 865
 866                 jit_set_code(code, code_size);
 867         }
 868
 869         code = jit_emit();
 870
 871         jit_get_code(&new_code_size);
 872         lightrec_register(MEM_FOR_CODE, new_code_size);
 873
 874         if (has_code_buffer) {
 875                 lightrec_realloc_code(state, code, (size_t) new_code_size);
 876
 877                 pr_debug("Creating code block at address 0x%" PRIxPTR ", "
 878                          "code size: %" PRIuPTR " new: %" PRIuPTR "\n",
 879                          (uintptr_t) code, code_size, new_code_size);
 880         }
 881
 882         *size = (unsigned int) new_code_size;
 883
 884         if (state->ops.code_inv)
 885                 state->ops.code_inv(code, new_code_size);
 886
 887         return code;
 888 }
 889
 890 static struct block * generate_wrapper(struct lightrec_state *state)
 891 {
 892         struct block *block;
 893         jit_state_t *_jit;
 894         unsigned int i;
 895         jit_node_t *addr[C_WRAPPERS_COUNT - 1];
 896         jit_node_t *to_end[C_WRAPPERS_COUNT - 1];
 897         u8 tmp = JIT_R1;
 898
 899 #ifdef __sh__
 900         /* On SH, GBR-relative loads target the r0 register.
 901          * Use it as the temporary register to factorize the move to
 902          * JIT_R1. */
 903         if (LIGHTREC_REG_STATE == _GBR)
 904                 tmp = _R0;
 905 #endif
 906
 907         block = lightrec_malloc(state, MEM_FOR_IR, sizeof(*block));
 908         if (!block)
 909                 goto err_no_mem;
 910
 911         _jit = jit_new_state();
 912         if (!_jit)
 913                 goto err_free_block;
 914
 915         jit_name("RW wrapper");
 916         jit_note(__FILE__, __LINE__);
 917
 918         /* Wrapper entry point */
 919         jit_prolog();
 920         jit_tramp(256);
 921
 922         /* Add entry points */
 923         for (i = C_WRAPPERS_COUNT - 1; i > 0; i--) {
 924                 jit_ldxi(tmp, LIGHTREC_REG_STATE,
 925                          offsetof(struct lightrec_state, c_wrappers[i]));
 926                 to_end[i - 1] = jit_b();
 927                 addr[i - 1] = jit_indirect();
 928         }
 929
 930         jit_ldxi(tmp, LIGHTREC_REG_STATE,
 931                  offsetof(struct lightrec_state, c_wrappers[0]));
 932
 933         for (i = 0; i < C_WRAPPERS_COUNT - 1; i++)
 934                 jit_patch(to_end[i]);
 935         jit_movr(JIT_R1, tmp);
 936
 937         jit_epilog();
 938         jit_prolog();
 939
 940         /* Save all temporaries on stack */
 941         for (i = 0; i < NUM_TEMPS; i++) {
 942                 if (i + FIRST_TEMP != 1) {
 943                         jit_stxi(offsetof(struct lightrec_state, wrapper_regs[i]),
 944                                  LIGHTREC_REG_STATE, JIT_R(i + FIRST_TEMP));
 945                 }
 946         }
 947
 948         jit_getarg(JIT_R2, jit_arg());
 949
 950         jit_prepare();
 951         jit_pushargr(LIGHTREC_REG_STATE);
 952         jit_pushargr(JIT_R2);
 953
 954         jit_ldxi_ui(JIT_R2, LIGHTREC_REG_STATE,
 955                     offsetof(struct lightrec_state, target_cycle));
 956
 957         /* state->current_cycle = state->target_cycle - delta; */
 958         jit_subr(LIGHTREC_REG_CYCLE, JIT_R2, LIGHTREC_REG_CYCLE);
 959         jit_stxi_i(offsetof(struct lightrec_state, current_cycle),
 960                    LIGHTREC_REG_STATE, LIGHTREC_REG_CYCLE);
 961
 962         /* Call the wrapper function */
 963         jit_finishr(JIT_R1);
 964
 965         /* delta = state->target_cycle - state->current_cycle */;
 966         jit_ldxi_ui(LIGHTREC_REG_CYCLE, LIGHTREC_REG_STATE,
 967                     offsetof(struct lightrec_state, current_cycle));
 968         jit_ldxi_ui(JIT_R1, LIGHTREC_REG_STATE,
 969                     offsetof(struct lightrec_state, target_cycle));
 970         jit_subr(LIGHTREC_REG_CYCLE, JIT_R1, LIGHTREC_REG_CYCLE);
 971
 972         /* Restore temporaries from stack */
 973         for (i = 0; i < NUM_TEMPS; i++) {
 974                 if (i + FIRST_TEMP != 1) {
 975                         jit_ldxi(JIT_R(i + FIRST_TEMP), LIGHTREC_REG_STATE,
 976                                  offsetof(struct lightrec_state, wrapper_regs[i]));
 977                 }
 978         }
 979
 980         jit_ret();
 981         jit_epilog();
 982
 983         block->_jit = _jit;
 984         block->opcode_list = NULL;
 985         block->flags = BLOCK_NO_OPCODE_LIST;
 986         block->nb_ops = 0;
 987
 988         block->function = lightrec_emit_code(state, block, _jit,
 989                                              &block->code_size);
 990         if (!block->function)
 991                 goto err_free_block;
 992
 993         state->wrappers_eps[C_WRAPPERS_COUNT - 1] = block->function;
 994
 995         for (i = 0; i < C_WRAPPERS_COUNT - 1; i++)
 996                 state->wrappers_eps[i] = jit_address(addr[i]);
 997
 998         if (ENABLE_DISASSEMBLER) {
 999                 pr_debug("Wrapper block:\n");
1000                 jit_disassemble();
1001         }
1002
1003         jit_clear_state();
1004         return block;
1005
1006 err_free_block:
1007         lightrec_free(state, MEM_FOR_IR, sizeof(*block), block);
1008 err_no_mem:
1009         pr_err("Unable to compile wrapper: Out of memory\n");
1010         return NULL;
1011 }
1012
1013 static u32 lightrec_memset(struct lightrec_state *state)
1014 {
1015         u32 kunseg_pc = kunseg(state->regs.gpr[4]);
1016         void *host;
1017         const struct lightrec_mem_map *map = lightrec_get_map(state, &host, kunseg_pc);
1018         u32 length = state->regs.gpr[5] * 4;
1019
1020         if (!map) {
1021                 pr_err("Unable to find memory map for memset target address "
1022                        "0x%x\n", kunseg_pc);
1023                 return 0;
1024         }
1025
1026         pr_debug("Calling host memset, PC 0x%x (host address 0x%" PRIxPTR ") for %u bytes\n",
1027                  kunseg_pc, (uintptr_t)host, length);
1028         memset(host, 0, length);
1029
1030         if (!state->invalidate_from_dma_only)
1031                 lightrec_invalidate_map(state, map, kunseg_pc, length);
1032
1033         /* Rough estimation of the number of cycles consumed */
1034         return 8 + 5 * (length  + 3 / 4);
1035 }
1036
1037 static u32 lightrec_check_load_delay(struct lightrec_state *state, u32 pc, u8 reg)
1038 {
1039         struct block *block;
1040         union code first_op;
1041
1042         first_op = lightrec_read_opcode(state, pc);
1043
1044         if (likely(!opcode_reads_register(first_op, reg))) {
1045                 state->regs.gpr[reg] = state->temp_reg;
1046         } else {
1047                 block = lightrec_get_block(state, pc);
1048                 if (unlikely(!block)) {
1049                         pr_err("Unable to get block at PC 0x%08x\n", pc);
1050                         lightrec_set_exit_flags(state, LIGHTREC_EXIT_SEGFAULT);
1051                         pc = 0;
1052                 } else {
1053                         pc = lightrec_handle_load_delay(state, block, pc, reg);
1054                 }
1055         }
1056
1057         return pc;
1058 }
1059
1060 static void update_cycle_counter_before_c(jit_state_t *_jit)
1061 {
1062         /* update state->current_cycle */
1063         jit_ldxi_i(JIT_R2, LIGHTREC_REG_STATE,
1064                    offsetof(struct lightrec_state, target_cycle));
1065         jit_subr(JIT_R1, JIT_R2, LIGHTREC_REG_CYCLE);
1066         jit_stxi_i(offsetof(struct lightrec_state, current_cycle),
1067                    LIGHTREC_REG_STATE, JIT_R1);
1068 }
1069
1070 static void update_cycle_counter_after_c(jit_state_t *_jit)
1071 {
1072         /* Recalc the delta */
1073         jit_ldxi_i(JIT_R1, LIGHTREC_REG_STATE,
1074                    offsetof(struct lightrec_state, current_cycle));
1075         jit_ldxi_i(JIT_R2, LIGHTREC_REG_STATE,
1076                    offsetof(struct lightrec_state, target_cycle));
1077         jit_subr(LIGHTREC_REG_CYCLE, JIT_R2, JIT_R1);
1078 }
1079
1080 static struct block * generate_dispatcher(struct lightrec_state *state)
1081 {
1082         struct block *block;
1083         jit_state_t *_jit;
1084         jit_node_t *to_end, *loop, *addr, *addr2, *addr3, *addr4, *addr5, *jmp, *jmp2;
1085         unsigned int i;
1086         u32 offset;
1087
1088         block = lightrec_malloc(state, MEM_FOR_IR, sizeof(*block));
1089         if (!block)
1090                 goto err_no_mem;
1091
1092         _jit = jit_new_state();
1093         if (!_jit)
1094                 goto err_free_block;
1095
1096         jit_name("dispatcher");
1097         jit_note(__FILE__, __LINE__);
1098
1099         jit_prolog();
1100         jit_frame(256);
1101
1102         jit_getarg(LIGHTREC_REG_STATE, jit_arg());
1103         jit_getarg(JIT_V0, jit_arg());
1104         jit_getarg(JIT_V1, jit_arg());
1105         jit_getarg_i(LIGHTREC_REG_CYCLE, jit_arg());
1106
1107         /* Force all callee-saved registers to be pushed on the stack */
1108         for (i = 0; i < NUM_REGS; i++)
1109                 jit_movr(JIT_V(i + FIRST_REG), JIT_V(i + FIRST_REG));
1110
1111         loop = jit_label();
1112
1113         /* Call the block's code */
1114         jit_jmpr(JIT_V1);
1115
1116         if (OPT_REPLACE_MEMSET) {
1117                 /* Blocks will jump here when they need to call
1118                  * lightrec_memset() */
1119                 addr3 = jit_indirect();
1120
1121                 jit_movr(JIT_V1, LIGHTREC_REG_CYCLE);
1122
1123                 jit_prepare();
1124                 jit_pushargr(LIGHTREC_REG_STATE);
1125
1126                 jit_finishi(lightrec_memset);
1127                 jit_retval(LIGHTREC_REG_CYCLE);
1128
1129                 jit_ldxi_ui(JIT_V0, LIGHTREC_REG_STATE,
1130                             offsetof(struct lightrec_state, regs.gpr[31]));
1131                 jit_subr(LIGHTREC_REG_CYCLE, JIT_V1, LIGHTREC_REG_CYCLE);
1132
1133                 if (OPT_DETECT_IMPOSSIBLE_BRANCHES || OPT_HANDLE_LOAD_DELAYS)
1134                         jmp = jit_b();
1135         }
1136
1137         if (OPT_DETECT_IMPOSSIBLE_BRANCHES) {
1138                 /* Blocks will jump here when they reach a branch that should
1139                  * be executed with the interpreter, passing the branch's PC
1140                  * in JIT_V0 and the address of the block in JIT_V1. */
1141                 addr4 = jit_indirect();
1142
1143                 update_cycle_counter_before_c(_jit);
1144
1145                 jit_prepare();
1146                 jit_pushargr(LIGHTREC_REG_STATE);
1147                 jit_pushargr(JIT_V1);
1148                 jit_pushargr(JIT_V0);
1149                 jit_finishi(lightrec_emulate_block);
1150
1151                 jit_retval(JIT_V0);
1152
1153                 update_cycle_counter_after_c(_jit);
1154
1155                 if (OPT_HANDLE_LOAD_DELAYS)
1156                         jmp2 = jit_b();
1157
1158         }
1159
1160         if (OPT_HANDLE_LOAD_DELAYS) {
1161                 /* Blocks will jump here when they reach a branch with a load
1162                  * opcode in its delay slot. The delay slot has already been
1163                  * executed; the load value is in (state->temp_reg), and the
1164                  * register number is in JIT_V1.
1165                  * Jump to a C function which will evaluate the branch target's
1166                  * first opcode, to make sure that it does not read the register
1167                  * in question; and if it does, handle it accordingly. */
1168                 addr5 = jit_indirect();
1169
1170                 update_cycle_counter_before_c(_jit);
1171
1172                 jit_prepare();
1173                 jit_pushargr(LIGHTREC_REG_STATE);
1174                 jit_pushargr(JIT_V0);
1175                 jit_pushargr(JIT_V1);
1176                 jit_finishi(lightrec_check_load_delay);
1177
1178                 jit_retval(JIT_V0);
1179
1180                 update_cycle_counter_after_c(_jit);
1181
1182                 if (OPT_DETECT_IMPOSSIBLE_BRANCHES)
1183                         jit_patch(jmp2);
1184         }
1185
1186         if (OPT_REPLACE_MEMSET
1187             && (OPT_DETECT_IMPOSSIBLE_BRANCHES || OPT_HANDLE_LOAD_DELAYS)) {
1188                 jit_patch(jmp);
1189         }
1190
1191         /* The block will jump here, with the number of cycles remaining in
1192          * LIGHTREC_REG_CYCLE */
1193         addr2 = jit_indirect();
1194
1195         /* Store back the next_pc to the lightrec_state structure */
1196         offset = offsetof(struct lightrec_state, next_pc);
1197         jit_stxi_i(offset, LIGHTREC_REG_STATE, JIT_V0);
1198
1199         /* Jump to end if state->target_cycle < state->current_cycle */
1200         to_end = jit_blei(LIGHTREC_REG_CYCLE, 0);
1201
1202         /* Convert next PC to KUNSEG and avoid mirrors */
1203         jit_andi(JIT_V1, JIT_V0, 0x10000000 | (RAM_SIZE - 1));
1204         jit_rshi_u(JIT_R1, JIT_V1, 28);
1205         jit_andi(JIT_R2, JIT_V0, BIOS_SIZE - 1);
1206         jit_addi(JIT_R2, JIT_R2, RAM_SIZE);
1207         jit_movnr(JIT_V1, JIT_R2, JIT_R1);
1208
1209         /* If possible, use the code LUT */
1210         if (!lut_is_32bit(state))
1211                 jit_lshi(JIT_V1, JIT_V1, 1);
1212         jit_add_state(JIT_V1, JIT_V1);
1213
1214         offset = offsetof(struct lightrec_state, code_lut);
1215         if (lut_is_32bit(state))
1216                 jit_ldxi_ui(JIT_V1, JIT_V1, offset);
1217         else
1218                 jit_ldxi(JIT_V1, JIT_V1, offset);
1219
1220         /* If we get non-NULL, loop */
1221         jit_patch_at(jit_bnei(JIT_V1, 0), loop);
1222
1223         /* The code LUT will be set to this address when the block at the target
1224          * PC has been preprocessed but not yet compiled by the threaded
1225          * recompiler */
1226         addr = jit_indirect();
1227
1228         /* Slow path: call C function get_next_block_func() */
1229
1230         if (ENABLE_FIRST_PASS || OPT_DETECT_IMPOSSIBLE_BRANCHES) {
1231                 /* We may call the interpreter - update state->current_cycle */
1232                 update_cycle_counter_before_c(_jit);
1233         }
1234
1235         jit_prepare();
1236         jit_pushargr(LIGHTREC_REG_STATE);
1237         jit_pushargr(JIT_V0);
1238
1239         /* Save the cycles register if needed */
1240         if (!(ENABLE_FIRST_PASS || OPT_DETECT_IMPOSSIBLE_BRANCHES))
1241                 jit_movr(JIT_V0, LIGHTREC_REG_CYCLE);
1242
1243         /* Get the next block */
1244         jit_finishi(&get_next_block_func);
1245         jit_retval(JIT_V1);
1246
1247         if (ENABLE_FIRST_PASS || OPT_DETECT_IMPOSSIBLE_BRANCHES) {
1248                 /* The interpreter may have updated state->current_cycle and
1249                  * state->target_cycle - recalc the delta */
1250                 update_cycle_counter_after_c(_jit);
1251         } else {
1252                 jit_movr(LIGHTREC_REG_CYCLE, JIT_V0);
1253         }
1254
1255         /* Reset JIT_V0 to the next PC */
1256         jit_ldxi_ui(JIT_V0, LIGHTREC_REG_STATE,
1257                     offsetof(struct lightrec_state, next_pc));
1258
1259         /* If we get non-NULL, loop */
1260         jit_patch_at(jit_bnei(JIT_V1, 0), loop);
1261
1262         /* When exiting, the recompiled code will jump to that address */
1263         jit_note(__FILE__, __LINE__);
1264         jit_patch(to_end);
1265
1266         jit_retr(LIGHTREC_REG_CYCLE);
1267         jit_epilog();
1268
1269         block->_jit = _jit;
1270         block->opcode_list = NULL;
1271         block->flags = BLOCK_NO_OPCODE_LIST;
1272         block->nb_ops = 0;
1273
1274         block->function = lightrec_emit_code(state, block, _jit,
1275                                              &block->code_size);
1276         if (!block->function)
1277                 goto err_free_block;
1278
1279         state->eob_wrapper_func = jit_address(addr2);
1280         if (OPT_DETECT_IMPOSSIBLE_BRANCHES)
1281                 state->interpreter_func = jit_address(addr4);
1282         if (OPT_HANDLE_LOAD_DELAYS)
1283                 state->ds_check_func = jit_address(addr5);
1284         if (OPT_REPLACE_MEMSET)
1285                 state->memset_func = jit_address(addr3);
1286         state->get_next_block = jit_address(addr);
1287
1288         if (ENABLE_DISASSEMBLER) {
1289                 pr_debug("Dispatcher block:\n");
1290                 jit_disassemble();
1291         }
1292
1293         /* We're done! */
1294         jit_clear_state();
1295         return block;
1296
1297 err_free_block:
1298         lightrec_free(state, MEM_FOR_IR, sizeof(*block), block);
1299 err_no_mem:
1300         pr_err("Unable to compile dispatcher: Out of memory\n");
1301         return NULL;
1302 }
1303
1304 union code lightrec_read_opcode(struct lightrec_state *state, u32 pc)
1305 {
1306         void *host = NULL;
1307
1308         lightrec_get_map(state, &host, kunseg(pc));
1309
1310         const u32 *code = (u32 *)host;
1311         return (union code) LE32TOH(*code);
1312 }
1313
1314 __cnst unsigned int lightrec_cycles_of_opcode(union code code)
1315 {
1316         return 2;
1317 }
1318
1319 void lightrec_free_opcode_list(struct lightrec_state *state, struct opcode *ops)
1320 {
1321         struct opcode_list *list = container_of(ops, struct opcode_list, ops);
1322
1323         lightrec_free(state, MEM_FOR_IR,
1324                       sizeof(*list) + list->nb_ops * sizeof(struct opcode),
1325                       list);
1326 }
1327
1328 static unsigned int lightrec_get_mips_block_len(const u32 *src)
1329 {
1330         unsigned int i;
1331         union code c;
1332
1333         for (i = 1; ; i++) {
1334                 c.opcode = LE32TOH(*src++);
1335
1336                 if (is_syscall(c))
1337                         return i;
1338
1339                 if (is_unconditional_jump(c))
1340                         return i + 1;
1341         }
1342 }
1343
1344 static struct opcode * lightrec_disassemble(struct lightrec_state *state,
1345                                             const u32 *src, unsigned int *len)
1346 {
1347         struct opcode_list *list;
1348         unsigned int i, length;
1349
1350         length = lightrec_get_mips_block_len(src);
1351
1352         list = lightrec_malloc(state, MEM_FOR_IR,
1353                                sizeof(*list) + sizeof(struct opcode) * length);
1354         if (!list) {
1355                 pr_err("Unable to allocate memory\n");
1356                 return NULL;
1357         }
1358
1359         list->nb_ops = (u16) length;
1360
1361         for (i = 0; i < length; i++) {
1362                 list->ops[i].opcode = LE32TOH(src[i]);
1363                 list->ops[i].flags = 0;
1364         }
1365
1366         *len = length * sizeof(u32);
1367
1368         return list->ops;
1369 }
1370
1371 static struct block * lightrec_precompile_block(struct lightrec_state *state,
1372                                                 u32 pc)
1373 {
1374         struct opcode *list;
1375         struct block *block;
1376         void *host, *addr;
1377         const struct lightrec_mem_map *map = lightrec_get_map(state, &host, kunseg(pc));
1378         const u32 *code = (u32 *) host;
1379         unsigned int length;
1380         bool fully_tagged;
1381         u8 block_flags = 0;
1382
1383         if (!map)
1384                 return NULL;
1385
1386         block = lightrec_malloc(state, MEM_FOR_IR, sizeof(*block));
1387         if (!block) {
1388                 pr_err("Unable to recompile block: Out of memory\n");
1389                 return NULL;
1390         }
1391
1392         list = lightrec_disassemble(state, code, &length);
1393         if (!list) {
1394                 lightrec_free(state, MEM_FOR_IR, sizeof(*block), block);
1395                 return NULL;
1396         }
1397
1398         block->pc = pc;
1399         block->_jit = NULL;
1400         block->function = NULL;
1401         block->opcode_list = list;
1402         block->code = code;
1403         block->next = NULL;
1404         block->flags = 0;
1405         block->code_size = 0;
1406         block->precompile_date = state->current_cycle;
1407         block->nb_ops = length / sizeof(u32);
1408
1409         lightrec_optimize(state, block);
1410
1411         length = block->nb_ops * sizeof(u32);
1412
1413         lightrec_register(MEM_FOR_MIPS_CODE, length);
1414
1415         if (ENABLE_DISASSEMBLER) {
1416                 pr_debug("Disassembled block at PC: 0x%08x\n", block->pc);
1417                 lightrec_print_disassembly(block, code);
1418         }
1419
1420         pr_debug("Block size: %hu opcodes\n", block->nb_ops);
1421
1422         fully_tagged = lightrec_block_is_fully_tagged(block);
1423         if (fully_tagged)
1424                 block_flags |= BLOCK_FULLY_TAGGED;
1425
1426         if (block_flags)
1427                 block_set_flags(block, block_flags);
1428
1429         block->hash = lightrec_calculate_block_hash(block);
1430
1431         if (OPT_REPLACE_MEMSET && block_has_flag(block, BLOCK_IS_MEMSET))
1432                 addr = state->memset_func;
1433         else
1434                 addr = state->get_next_block;
1435         lut_write(state, lut_offset(pc), addr);
1436
1437         pr_debug("Blocks created: %u\n", ++state->nb_precompile);
1438
1439         return block;
1440 }
1441
1442 static bool lightrec_block_is_fully_tagged(const struct block *block)
1443 {
1444         const struct opcode *op;
1445         unsigned int i;
1446
1447         for (i = 0; i < block->nb_ops; i++) {
1448                 op = &block->opcode_list[i];
1449
1450                 /* If we have one branch that must be emulated, we cannot trash
1451                  * the opcode list. */
1452                 if (should_emulate(op))
1453                         return false;
1454
1455                 /* Check all loads/stores of the opcode list and mark the
1456                  * block as fully compiled if they all have been tagged. */
1457                 switch (op->c.i.op) {
1458                 case OP_LB:
1459                 case OP_LH:
1460                 case OP_LWL:
1461                 case OP_LW:
1462                 case OP_LBU:
1463                 case OP_LHU:
1464                 case OP_LWR:
1465                 case OP_SB:
1466                 case OP_SH:
1467                 case OP_SWL:
1468                 case OP_SW:
1469                 case OP_SWR:
1470                 case OP_LWC2:
1471                 case OP_SWC2:
1472                         if (!LIGHTREC_FLAGS_GET_IO_MODE(op->flags))
1473                                 return false;
1474                         fallthrough;
1475                 default:
1476                         continue;
1477                 }
1478         }
1479
1480         return true;
1481 }
1482
1483 static void lightrec_reap_block(struct lightrec_state *state, void *data)
1484 {
1485         struct block *block = data;
1486
1487         pr_debug("Reap dead block at PC 0x%08x\n", block->pc);
1488         lightrec_unregister_block(state->block_cache, block);
1489         lightrec_free_block(state, block);
1490 }
1491
1492 static void lightrec_reap_jit(struct lightrec_state *state, void *data)
1493 {
1494         _jit_destroy_state(data);
1495 }
1496
1497 static void lightrec_free_function(struct lightrec_state *state, void *fn)
1498 {
1499         if (ENABLE_CODE_BUFFER && state->tlsf) {
1500                 pr_debug("Freeing code block at 0x%" PRIxPTR "\n", (uintptr_t) fn);
1501                 lightrec_free_code(state, fn);
1502         }
1503 }
1504
1505 static void lightrec_reap_function(struct lightrec_state *state, void *data)
1506 {
1507         lightrec_free_function(state, data);
1508 }
1509
1510 static void lightrec_reap_opcode_list(struct lightrec_state *state, void *data)
1511 {
1512         lightrec_free_opcode_list(state, data);
1513 }
1514
1515 int lightrec_compile_block(struct lightrec_cstate *cstate,
1516                            struct block *block)
1517 {
1518         struct lightrec_state *state = cstate->state;
1519         struct lightrec_branch_target *target;
1520         bool fully_tagged = false;
1521         struct block *block2;
1522         struct opcode *elm;
1523         jit_state_t *_jit, *oldjit;
1524         jit_node_t *start_of_block;
1525         bool skip_next = false;
1526         void *old_fn, *new_fn;
1527         size_t old_code_size;
1528         unsigned int i, j;
1529         u8 old_flags;
1530         u32 offset;
1531
1532         fully_tagged = lightrec_block_is_fully_tagged(block);
1533         if (fully_tagged)
1534                 block_set_flags(block, BLOCK_FULLY_TAGGED);
1535
1536         _jit = jit_new_state();
1537         if (!_jit)
1538                 return -ENOMEM;
1539
1540         oldjit = block->_jit;
1541         old_fn = block->function;
1542         old_code_size = block->code_size;
1543         block->_jit = _jit;
1544
1545         lightrec_regcache_reset(cstate->reg_cache);
1546         lightrec_preload_pc(cstate->reg_cache);
1547
1548         cstate->cycles = 0;
1549         cstate->nb_local_branches = 0;
1550         cstate->nb_targets = 0;
1551         cstate->no_load_delay = false;
1552
1553         jit_prolog();
1554         jit_tramp(256);
1555
1556         start_of_block = jit_label();
1557
1558         for (i = 0; i < block->nb_ops; i++) {
1559                 elm = &block->opcode_list[i];
1560
1561                 if (skip_next) {
1562                         skip_next = false;
1563                         continue;
1564                 }
1565
1566                 if (should_emulate(elm)) {
1567                         pr_debug("Branch at offset 0x%x will be emulated\n",
1568                                  i << 2);
1569
1570                         lightrec_emit_jump_to_interpreter(cstate, block, i);
1571                         skip_next = !op_flag_no_ds(elm->flags);
1572                 } else {
1573                         lightrec_rec_opcode(cstate, block, i);
1574                         skip_next = !op_flag_no_ds(elm->flags) && has_delay_slot(elm->c);
1575 #if _WIN32
1576                         /* FIXME: GNU Lightning on Windows seems to use our
1577                          * mapped registers as temporaries. Until the actual bug
1578                          * is found and fixed, unconditionally mark our
1579                          * registers as live here. */
1580                         lightrec_regcache_mark_live(cstate->reg_cache, _jit);
1581 #endif
1582                 }
1583
1584                 cstate->cycles += lightrec_cycles_of_opcode(elm->c);
1585         }
1586
1587         for (i = 0; i < cstate->nb_local_branches; i++) {
1588                 struct lightrec_branch *branch = &cstate->local_branches[i];
1589
1590                 pr_debug("Patch local branch to offset 0x%x\n",
1591                          branch->target << 2);
1592
1593                 if (branch->target == 0) {
1594                         jit_patch_at(branch->branch, start_of_block);
1595                         continue;
1596                 }
1597
1598                 for (j = 0; j < cstate->nb_targets; j++) {
1599                         if (cstate->targets[j].offset == branch->target) {
1600                                 jit_patch_at(branch->branch,
1601                                              cstate->targets[j].label);
1602                                 break;
1603                         }
1604                 }
1605
1606                 if (j == cstate->nb_targets)
1607                         pr_err("Unable to find branch target\n");
1608         }
1609
1610         jit_ret();
1611         jit_epilog();
1612
1613         new_fn = lightrec_emit_code(state, block, _jit, &block->code_size);
1614         if (!new_fn) {
1615                 if (!ENABLE_THREADED_COMPILER)
1616                         pr_err("Unable to compile block!\n");
1617                 block->_jit = oldjit;
1618                 jit_clear_state();
1619                 _jit_destroy_state(_jit);
1620                 return -ENOMEM;
1621         }
1622
1623         /* Pause the reaper, because lightrec_reset_lut_offset() may try to set
1624          * the old block->function pointer to the code LUT. */
1625         if (ENABLE_THREADED_COMPILER)
1626                 lightrec_reaper_pause(state->reaper);
1627
1628         block->function = new_fn;
1629         block_clear_flags(block, BLOCK_SHOULD_RECOMPILE);
1630
1631         /* Add compiled function to the LUT */
1632         lut_write(state, lut_offset(block->pc), block->function);
1633
1634         if (ENABLE_THREADED_COMPILER)
1635                 lightrec_reaper_continue(state->reaper);
1636
1637         /* Detect old blocks that have been covered by the new one */
1638         for (i = 0; i < cstate->nb_targets; i++) {
1639                 target = &cstate->targets[i];
1640
1641                 if (!target->offset)
1642                         continue;
1643
1644                 offset = block->pc + target->offset * sizeof(u32);
1645
1646                 /* Pause the reaper while we search for the block until we set
1647                  * the BLOCK_IS_DEAD flag, otherwise the block may be removed
1648                  * under our feet. */
1649                 if (ENABLE_THREADED_COMPILER)
1650                         lightrec_reaper_pause(state->reaper);
1651
1652                 block2 = lightrec_find_block(state->block_cache, offset);
1653                 if (block2) {
1654                         /* No need to check if block2 is compilable - it must
1655                          * be, otherwise block wouldn't be compilable either */
1656
1657                         /* Set the "block dead" flag to prevent the dynarec from
1658                          * recompiling this block */
1659                         old_flags = block_set_flags(block2, BLOCK_IS_DEAD);
1660                 }
1661
1662                 if (ENABLE_THREADED_COMPILER) {
1663                         lightrec_reaper_continue(state->reaper);
1664
1665                         /* If block2 was pending for compilation, cancel it.
1666                          * If it's being compiled right now, wait until it
1667                          * finishes. */
1668                         if (block2)
1669                                 lightrec_recompiler_remove(state->rec, block2);
1670                 }
1671
1672                 /* We know from now on that block2 (if present) isn't going to
1673                  * be compiled. We can override the LUT entry with our new
1674                  * block's entry point. */
1675                 offset = lut_offset(block->pc) + target->offset;
1676                 lut_write(state, offset, jit_address(target->label));
1677
1678                 if (block2) {
1679                         pr_debug("Reap block 0x%08x as it's covered by block "
1680                                  "0x%08x\n", block2->pc, block->pc);
1681
1682                         /* Finally, reap the block. */
1683                         if (!ENABLE_THREADED_COMPILER) {
1684                                 lightrec_unregister_block(state->block_cache, block2);
1685                                 lightrec_free_block(state, block2);
1686                         } else if (!(old_flags & BLOCK_IS_DEAD)) {
1687                                 lightrec_reaper_add(state->reaper,
1688                                                     lightrec_reap_block,
1689                                                     block2);
1690                         }
1691                 }
1692         }
1693
1694         if (ENABLE_DISASSEMBLER) {
1695                 pr_debug("Compiling block at PC: 0x%08x\n", block->pc);
1696                 jit_disassemble();
1697         }
1698
1699         jit_clear_state();
1700
1701         if (fully_tagged)
1702                 old_flags = block_set_flags(block, BLOCK_NO_OPCODE_LIST);
1703
1704         if (fully_tagged && !(old_flags & BLOCK_NO_OPCODE_LIST)) {
1705                 pr_debug("Block PC 0x%08x is fully tagged"
1706                          " - free opcode list\n", block->pc);
1707
1708                 if (ENABLE_THREADED_COMPILER) {
1709                         lightrec_reaper_add(state->reaper,
1710                                             lightrec_reap_opcode_list,
1711                                             block->opcode_list);
1712                 } else {
1713                         lightrec_free_opcode_list(state, block->opcode_list);
1714                 }
1715         }
1716
1717         if (oldjit) {
1718                 pr_debug("Block 0x%08x recompiled, reaping old jit context.\n",
1719                          block->pc);
1720
1721                 if (ENABLE_THREADED_COMPILER) {
1722                         lightrec_reaper_add(state->reaper,
1723                                             lightrec_reap_jit, oldjit);
1724                         lightrec_reaper_add(state->reaper,
1725                                             lightrec_reap_function, old_fn);
1726                 } else {
1727                         _jit_destroy_state(oldjit);
1728                         lightrec_free_function(state, old_fn);
1729                 }
1730
1731                 lightrec_unregister(MEM_FOR_CODE, old_code_size);
1732         }
1733
1734         pr_debug("Blocks compiled: %u\n", ++state->nb_compile);
1735
1736         return 0;
1737 }
1738
1739 static void lightrec_print_info(struct lightrec_state *state)
1740 {
1741         if ((state->current_cycle & ~0xfffffff) != state->old_cycle_counter) {
1742                 pr_info("Lightrec RAM usage: IR %u KiB, CODE %u KiB, "
1743                         "MIPS %u KiB, TOTAL %u KiB, avg. IPI %f\n",
1744                         lightrec_get_mem_usage(MEM_FOR_IR) / 1024,
1745                         lightrec_get_mem_usage(MEM_FOR_CODE) / 1024,
1746                         lightrec_get_mem_usage(MEM_FOR_MIPS_CODE) / 1024,
1747                         lightrec_get_total_mem_usage() / 1024,
1748                        lightrec_get_average_ipi());
1749                 state->old_cycle_counter = state->current_cycle & ~0xfffffff;
1750         }
1751 }
1752
1753 u32 lightrec_execute(struct lightrec_state *state, u32 pc, u32 target_cycle)
1754 {
1755         s32 (*func)(struct lightrec_state *, u32, void *, s32) = (void *)state->dispatcher->function;
1756         void *block_trace;
1757         s32 cycles_delta;
1758
1759         state->exit_flags = LIGHTREC_EXIT_NORMAL;
1760
1761         /* Handle the cycle counter overflowing */
1762         if (unlikely(target_cycle < state->current_cycle))
1763                 target_cycle = UINT_MAX;
1764
1765         state->target_cycle = target_cycle;
1766         state->next_pc = pc;
1767
1768         block_trace = get_next_block_func(state, pc);
1769         if (block_trace) {
1770                 cycles_delta = state->target_cycle - state->current_cycle;
1771
1772                 cycles_delta = (*func)(state, state->next_pc,
1773                                        block_trace, cycles_delta);
1774
1775                 state->current_cycle = state->target_cycle - cycles_delta;
1776         }
1777
1778         if (ENABLE_THREADED_COMPILER)
1779                 lightrec_reaper_reap(state->reaper);
1780
1781         if (LOG_LEVEL >= INFO_L)
1782                 lightrec_print_info(state);
1783
1784         return state->next_pc;
1785 }
1786
1787 u32 lightrec_run_interpreter(struct lightrec_state *state, u32 pc,
1788                              u32 target_cycle)
1789 {
1790         struct block *block;
1791
1792         state->exit_flags = LIGHTREC_EXIT_NORMAL;
1793         state->target_cycle = target_cycle;
1794
1795         do {
1796                 block = lightrec_get_block(state, pc);
1797                 if (!block)
1798                         break;
1799
1800                 pc = lightrec_emulate_block(state, block, pc);
1801
1802                 if (ENABLE_THREADED_COMPILER)
1803                         lightrec_reaper_reap(state->reaper);
1804         } while (state->current_cycle < state->target_cycle);
1805
1806         if (LOG_LEVEL >= INFO_L)
1807                 lightrec_print_info(state);
1808
1809         return pc;
1810 }
1811
1812 void lightrec_free_block(struct lightrec_state *state, struct block *block)
1813 {
1814         u8 old_flags;
1815
1816         lightrec_unregister(MEM_FOR_MIPS_CODE, block->nb_ops * sizeof(u32));
1817         old_flags = block_set_flags(block, BLOCK_NO_OPCODE_LIST);
1818
1819         if (!(old_flags & BLOCK_NO_OPCODE_LIST))
1820                 lightrec_free_opcode_list(state, block->opcode_list);
1821         if (block->_jit)
1822                 _jit_destroy_state(block->_jit);
1823         if (block->function) {
1824                 lightrec_free_function(state, block->function);
1825                 lightrec_unregister(MEM_FOR_CODE, block->code_size);
1826         }
1827         lightrec_free(state, MEM_FOR_IR, sizeof(*block), block);
1828 }
1829
1830 struct lightrec_cstate * lightrec_create_cstate(struct lightrec_state *state)
1831 {
1832         struct lightrec_cstate *cstate;
1833
1834         cstate = lightrec_malloc(state, MEM_FOR_LIGHTREC, sizeof(*cstate));
1835         if (!cstate)
1836                 return NULL;
1837
1838         cstate->reg_cache = lightrec_regcache_init(state);
1839         if (!cstate->reg_cache) {
1840                 lightrec_free(state, MEM_FOR_LIGHTREC, sizeof(*cstate), cstate);
1841                 return NULL;
1842         }
1843
1844         cstate->state = state;
1845
1846         return cstate;
1847 }
1848
1849 void lightrec_free_cstate(struct lightrec_cstate *cstate)
1850 {
1851         lightrec_free_regcache(cstate->reg_cache);
1852         lightrec_free(cstate->state, MEM_FOR_LIGHTREC, sizeof(*cstate), cstate);
1853 }
1854
1855 struct lightrec_state * lightrec_init(char *argv0,
1856                                       const struct lightrec_mem_map *map,
1857                                       size_t nb,
1858                                       const struct lightrec_ops *ops)
1859 {
1860         const struct lightrec_mem_map *codebuf_map = &map[PSX_MAP_CODE_BUFFER];
1861         struct lightrec_state *state;
1862         uintptr_t addr;
1863         void *tlsf = NULL;
1864         bool with_32bit_lut = false;
1865         size_t lut_size;
1866
1867         /* Sanity-check ops */
1868         if (!ops || !ops->cop2_op || !ops->enable_ram) {
1869                 pr_err("Missing callbacks in lightrec_ops structure\n");
1870                 return NULL;
1871         }
1872
1873         if (ops->cop2_notify)
1874                 pr_debug("Optional cop2_notify callback in lightrec_ops\n");
1875         else
1876                 pr_debug("No optional cop2_notify callback in lightrec_ops\n");
1877
1878         if (ENABLE_CODE_BUFFER && nb > PSX_MAP_CODE_BUFFER
1879             && codebuf_map->address) {
1880                 tlsf = tlsf_create_with_pool(codebuf_map->address,
1881                                              codebuf_map->length);
1882                 if (!tlsf) {
1883                         pr_err("Unable to initialize code buffer\n");
1884                         return NULL;
1885                 }
1886
1887                 if (__WORDSIZE == 64) {
1888                         addr = (uintptr_t) codebuf_map->address + codebuf_map->length - 1;
1889                         with_32bit_lut = addr == (u32) addr;
1890                 }
1891         }
1892
1893         if (with_32bit_lut)
1894                 lut_size = CODE_LUT_SIZE * 4;
1895         else
1896                 lut_size = CODE_LUT_SIZE * sizeof(void *);
1897
1898         init_jit(argv0);
1899
1900         state = calloc(1, sizeof(*state) + lut_size);
1901         if (!state)
1902                 goto err_finish_jit;
1903
1904         lightrec_register(MEM_FOR_LIGHTREC, sizeof(*state) + lut_size);
1905
1906         state->tlsf = tlsf;
1907         state->with_32bit_lut = with_32bit_lut;
1908         state->in_delay_slot_n = 0xff;
1909
1910         state->block_cache = lightrec_blockcache_init(state);
1911         if (!state->block_cache)
1912                 goto err_free_state;
1913
1914         if (ENABLE_THREADED_COMPILER) {
1915                 state->rec = lightrec_recompiler_init(state);
1916                 if (!state->rec)
1917                         goto err_free_block_cache;
1918
1919                 state->reaper = lightrec_reaper_init(state);
1920                 if (!state->reaper)
1921                         goto err_free_recompiler;
1922         } else {
1923                 state->cstate = lightrec_create_cstate(state);
1924                 if (!state->cstate)
1925                         goto err_free_block_cache;
1926         }
1927
1928         state->nb_maps = nb;
1929         state->maps = map;
1930
1931         memcpy(&state->ops, ops, sizeof(*ops));
1932
1933         state->dispatcher = generate_dispatcher(state);
1934         if (!state->dispatcher)
1935                 goto err_free_reaper;
1936
1937         state->c_wrapper_block = generate_wrapper(state);
1938         if (!state->c_wrapper_block)
1939                 goto err_free_dispatcher;
1940
1941         state->c_wrappers[C_WRAPPER_RW] = lightrec_rw_cb;
1942         state->c_wrappers[C_WRAPPER_RW_GENERIC] = lightrec_rw_generic_cb;
1943         state->c_wrappers[C_WRAPPER_MFC] = lightrec_mfc_cb;
1944         state->c_wrappers[C_WRAPPER_MTC] = lightrec_mtc_cb;
1945         state->c_wrappers[C_WRAPPER_CP] = lightrec_cp_cb;
1946
1947         map = &state->maps[PSX_MAP_BIOS];
1948         state->offset_bios = (uintptr_t)map->address - map->pc;
1949
1950         map = &state->maps[PSX_MAP_SCRATCH_PAD];
1951         state->offset_scratch = (uintptr_t)map->address - map->pc;
1952
1953         map = &state->maps[PSX_MAP_HW_REGISTERS];
1954         state->offset_io = (uintptr_t)map->address - map->pc;
1955
1956         map = &state->maps[PSX_MAP_KERNEL_USER_RAM];
1957         state->offset_ram = (uintptr_t)map->address - map->pc;
1958
1959         if (state->maps[PSX_MAP_MIRROR1].address == map->address + 0x200000 &&
1960             state->maps[PSX_MAP_MIRROR2].address == map->address + 0x400000 &&
1961             state->maps[PSX_MAP_MIRROR3].address == map->address + 0x600000)
1962                 state->mirrors_mapped = true;
1963
1964         if (state->offset_bios == 0 &&
1965             state->offset_scratch == 0 &&
1966             state->offset_ram == 0 &&
1967             state->offset_io == 0 &&
1968             state->mirrors_mapped) {
1969                 pr_info("Memory map is perfect. Emitted code will be best.\n");
1970         } else {
1971                 pr_info("Memory map is sub-par. Emitted code will be slow.\n");
1972         }
1973
1974         if (state->with_32bit_lut)
1975                 pr_info("Using 32-bit LUT\n");
1976
1977         return state;
1978
1979 err_free_dispatcher:
1980         lightrec_free_block(state, state->dispatcher);
1981 err_free_reaper:
1982         if (ENABLE_THREADED_COMPILER)
1983                 lightrec_reaper_destroy(state->reaper);
1984 err_free_recompiler:
1985         if (ENABLE_THREADED_COMPILER)
1986                 lightrec_free_recompiler(state->rec);
1987         else
1988                 lightrec_free_cstate(state->cstate);
1989 err_free_block_cache:
1990         lightrec_free_block_cache(state->block_cache);
1991 err_free_state:
1992         lightrec_unregister(MEM_FOR_LIGHTREC, sizeof(*state) +
1993                             lut_elm_size(state) * CODE_LUT_SIZE);
1994         free(state);
1995 err_finish_jit:
1996         finish_jit();
1997         if (ENABLE_CODE_BUFFER && tlsf)
1998                 tlsf_destroy(tlsf);
1999         return NULL;
2000 }
2001
2002 void lightrec_destroy(struct lightrec_state *state)
2003 {
2004         /* Force a print info on destroy*/
2005         state->current_cycle = ~state->current_cycle;
2006         lightrec_print_info(state);
2007
2008         lightrec_free_block_cache(state->block_cache);
2009         lightrec_free_block(state, state->dispatcher);
2010         lightrec_free_block(state, state->c_wrapper_block);
2011
2012         if (ENABLE_THREADED_COMPILER) {
2013                 lightrec_free_recompiler(state->rec);
2014                 lightrec_reaper_destroy(state->reaper);
2015         } else {
2016                 lightrec_free_cstate(state->cstate);
2017         }
2018
2019         finish_jit();
2020         if (ENABLE_CODE_BUFFER && state->tlsf)
2021                 tlsf_destroy(state->tlsf);
2022
2023         lightrec_unregister(MEM_FOR_LIGHTREC, sizeof(*state) +
2024                             lut_elm_size(state) * CODE_LUT_SIZE);
2025         free(state);
2026 }
2027
2028 void lightrec_invalidate(struct lightrec_state *state, u32 addr, u32 len)
2029 {
2030         u32 kaddr = kunseg(addr & ~0x3);
2031         enum psx_map idx = lightrec_get_map_idx(state, kaddr);
2032
2033         switch (idx) {
2034         case PSX_MAP_MIRROR1:
2035         case PSX_MAP_MIRROR2:
2036         case PSX_MAP_MIRROR3:
2037                 /* Handle mirrors */
2038                 kaddr &= RAM_SIZE - 1;
2039                 fallthrough;
2040         case PSX_MAP_KERNEL_USER_RAM:
2041                 break;
2042         default:
2043                 return;
2044         }
2045
2046         memset(lut_address(state, lut_offset(kaddr)), 0,
2047                ((len + 3) / 4) * lut_elm_size(state));
2048 }
2049
2050 void lightrec_invalidate_all(struct lightrec_state *state)
2051 {
2052         memset(state->code_lut, 0, lut_elm_size(state) * CODE_LUT_SIZE);
2053 }
2054
2055 void lightrec_set_invalidate_mode(struct lightrec_state *state, bool dma_only)
2056 {
2057         if (state->invalidate_from_dma_only != dma_only)
2058                 lightrec_invalidate_all(state);
2059
2060         state->invalidate_from_dma_only = dma_only;
2061 }
2062
2063 void lightrec_set_exit_flags(struct lightrec_state *state, u32 flags)
2064 {
2065         if (flags != LIGHTREC_EXIT_NORMAL) {
2066                 state->exit_flags |= flags;
2067                 state->target_cycle = state->current_cycle;
2068         }
2069 }
2070
2071 u32 lightrec_exit_flags(struct lightrec_state *state)
2072 {
2073         return state->exit_flags;
2074 }
2075
2076 u32 lightrec_current_cycle_count(const struct lightrec_state *state)
2077 {
2078         return state->current_cycle;
2079 }
2080
2081 void lightrec_reset_cycle_count(struct lightrec_state *state, u32 cycles)
2082 {
2083         state->current_cycle = cycles;
2084
2085         if (state->target_cycle < cycles)
2086                 state->target_cycle = cycles;
2087 }
2088
2089 void lightrec_set_target_cycle_count(struct lightrec_state *state, u32 cycles)
2090 {
2091         if (state->exit_flags == LIGHTREC_EXIT_NORMAL) {
2092                 if (cycles < state->current_cycle)
2093                         cycles = state->current_cycle;
2094
2095                 state->target_cycle = cycles;
2096         }
2097 }
2098
2099 struct lightrec_registers * lightrec_get_registers(struct lightrec_state *state)
2100 {
2101         return &state->regs;
2102 }