lightrec: Increase size of hw registers area
[pcsx_rearmed.git] / 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->curr_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->curr_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->curr_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 void sync_next_pc(jit_state_t *_jit)
1081 {
1082         if (lightrec_store_next_pc()) {
1083                 jit_ldxi_i(JIT_V0, LIGHTREC_REG_STATE,
1084                            offsetof(struct lightrec_state, next_pc));
1085         }
1086 }
1087
1088 static struct block * generate_dispatcher(struct lightrec_state *state)
1089 {
1090         struct block *block;
1091         jit_state_t *_jit;
1092         jit_node_t *to_end, *loop, *addr, *addr2, *addr3, *addr4, *addr5, *jmp, *jmp2;
1093         unsigned int i;
1094         u32 offset;
1095
1096         block = lightrec_malloc(state, MEM_FOR_IR, sizeof(*block));
1097         if (!block)
1098                 goto err_no_mem;
1099
1100         _jit = jit_new_state();
1101         if (!_jit)
1102                 goto err_free_block;
1103
1104         jit_name("dispatcher");
1105         jit_note(__FILE__, __LINE__);
1106
1107         jit_prolog();
1108         jit_frame(256);
1109
1110         jit_getarg(LIGHTREC_REG_STATE, jit_arg());
1111         jit_getarg(JIT_V0, jit_arg());
1112         jit_getarg(JIT_V1, jit_arg());
1113         jit_getarg_i(LIGHTREC_REG_CYCLE, jit_arg());
1114
1115         /* Force all callee-saved registers to be pushed on the stack */
1116         for (i = 0; i < NUM_REGS; i++)
1117                 jit_movr(JIT_V(i + FIRST_REG), JIT_V(i + FIRST_REG));
1118
1119         loop = jit_label();
1120
1121         /* Call the block's code */
1122         jit_jmpr(JIT_V1);
1123
1124         if (OPT_REPLACE_MEMSET) {
1125                 /* Blocks will jump here when they need to call
1126                  * lightrec_memset() */
1127                 addr3 = jit_indirect();
1128
1129                 jit_movr(JIT_V1, LIGHTREC_REG_CYCLE);
1130
1131                 jit_prepare();
1132                 jit_pushargr(LIGHTREC_REG_STATE);
1133
1134                 jit_finishi(lightrec_memset);
1135                 jit_retval(LIGHTREC_REG_CYCLE);
1136
1137                 jit_ldxi_ui(JIT_V0, LIGHTREC_REG_STATE,
1138                             offsetof(struct lightrec_state, regs.gpr[31]));
1139                 jit_subr(LIGHTREC_REG_CYCLE, JIT_V1, LIGHTREC_REG_CYCLE);
1140
1141                 if (OPT_DETECT_IMPOSSIBLE_BRANCHES || OPT_HANDLE_LOAD_DELAYS)
1142                         jmp = jit_b();
1143         }
1144
1145         if (OPT_DETECT_IMPOSSIBLE_BRANCHES) {
1146                 /* Blocks will jump here when they reach a branch that should
1147                  * be executed with the interpreter, passing the branch's PC
1148                  * in JIT_V0 and the address of the block in JIT_V1. */
1149                 addr4 = jit_indirect();
1150
1151                 sync_next_pc(_jit);
1152                 update_cycle_counter_before_c(_jit);
1153
1154                 jit_prepare();
1155                 jit_pushargr(LIGHTREC_REG_STATE);
1156                 jit_pushargr(JIT_V1);
1157                 jit_pushargr(JIT_V0);
1158                 jit_finishi(lightrec_emulate_block);
1159
1160                 jit_retval(JIT_V0);
1161
1162                 update_cycle_counter_after_c(_jit);
1163
1164                 if (OPT_HANDLE_LOAD_DELAYS)
1165                         jmp2 = jit_b();
1166
1167         }
1168
1169         if (OPT_HANDLE_LOAD_DELAYS) {
1170                 /* Blocks will jump here when they reach a branch with a load
1171                  * opcode in its delay slot. The delay slot has already been
1172                  * executed; the load value is in (state->temp_reg), and the
1173                  * register number is in JIT_V1.
1174                  * Jump to a C function which will evaluate the branch target's
1175                  * first opcode, to make sure that it does not read the register
1176                  * in question; and if it does, handle it accordingly. */
1177                 addr5 = jit_indirect();
1178
1179                 sync_next_pc(_jit);
1180                 update_cycle_counter_before_c(_jit);
1181
1182                 jit_prepare();
1183                 jit_pushargr(LIGHTREC_REG_STATE);
1184                 jit_pushargr(JIT_V0);
1185                 jit_pushargr(JIT_V1);
1186                 jit_finishi(lightrec_check_load_delay);
1187
1188                 jit_retval(JIT_V0);
1189
1190                 update_cycle_counter_after_c(_jit);
1191         }
1192
1193         /* The block will jump here, with the number of cycles remaining in
1194          * LIGHTREC_REG_CYCLE */
1195         addr2 = jit_indirect();
1196
1197         sync_next_pc(_jit);
1198
1199         if (OPT_HANDLE_LOAD_DELAYS && OPT_DETECT_IMPOSSIBLE_BRANCHES)
1200               jit_patch(jmp2);
1201
1202         if (OPT_REPLACE_MEMSET
1203             && (OPT_DETECT_IMPOSSIBLE_BRANCHES || OPT_HANDLE_LOAD_DELAYS)) {
1204                 jit_patch(jmp);
1205         }
1206
1207         /* Store back the next PC to the lightrec_state structure */
1208         offset = offsetof(struct lightrec_state, curr_pc);
1209         jit_stxi_i(offset, LIGHTREC_REG_STATE, JIT_V0);
1210
1211         /* Jump to end if state->target_cycle < state->current_cycle */
1212         to_end = jit_blei(LIGHTREC_REG_CYCLE, 0);
1213
1214         /* Convert next PC to KUNSEG and avoid mirrors */
1215         jit_andi(JIT_V1, JIT_V0, 0x10000000 | (RAM_SIZE - 1));
1216         jit_rshi_u(JIT_R1, JIT_V1, 28);
1217         jit_andi(JIT_R2, JIT_V0, BIOS_SIZE - 1);
1218         jit_addi(JIT_R2, JIT_R2, RAM_SIZE);
1219         jit_movnr(JIT_V1, JIT_R2, JIT_R1);
1220
1221         /* If possible, use the code LUT */
1222         if (!lut_is_32bit(state))
1223                 jit_lshi(JIT_V1, JIT_V1, 1);
1224         jit_add_state(JIT_V1, JIT_V1);
1225
1226         offset = offsetof(struct lightrec_state, code_lut);
1227         if (lut_is_32bit(state))
1228                 jit_ldxi_ui(JIT_V1, JIT_V1, offset);
1229         else
1230                 jit_ldxi(JIT_V1, JIT_V1, offset);
1231
1232         /* If we get non-NULL, loop */
1233         jit_patch_at(jit_bnei(JIT_V1, 0), loop);
1234
1235         /* The code LUT will be set to this address when the block at the target
1236          * PC has been preprocessed but not yet compiled by the threaded
1237          * recompiler */
1238         addr = jit_indirect();
1239
1240         /* Slow path: call C function get_next_block_func() */
1241
1242         if (ENABLE_FIRST_PASS || OPT_DETECT_IMPOSSIBLE_BRANCHES) {
1243                 /* We may call the interpreter - update state->current_cycle */
1244                 update_cycle_counter_before_c(_jit);
1245         }
1246
1247         jit_prepare();
1248         jit_pushargr(LIGHTREC_REG_STATE);
1249         jit_pushargr(JIT_V0);
1250
1251         /* Save the cycles register if needed */
1252         if (!(ENABLE_FIRST_PASS || OPT_DETECT_IMPOSSIBLE_BRANCHES))
1253                 jit_movr(JIT_V0, LIGHTREC_REG_CYCLE);
1254
1255         /* Get the next block */
1256         jit_finishi(&get_next_block_func);
1257         jit_retval(JIT_V1);
1258
1259         if (ENABLE_FIRST_PASS || OPT_DETECT_IMPOSSIBLE_BRANCHES) {
1260                 /* The interpreter may have updated state->current_cycle and
1261                  * state->target_cycle - recalc the delta */
1262                 update_cycle_counter_after_c(_jit);
1263         } else {
1264                 jit_movr(LIGHTREC_REG_CYCLE, JIT_V0);
1265         }
1266
1267         /* Reset JIT_V0 to the next PC */
1268         jit_ldxi_ui(JIT_V0, LIGHTREC_REG_STATE,
1269                     offsetof(struct lightrec_state, curr_pc));
1270
1271         /* If we get non-NULL, loop */
1272         jit_patch_at(jit_bnei(JIT_V1, 0), loop);
1273
1274         /* When exiting, the recompiled code will jump to that address */
1275         jit_note(__FILE__, __LINE__);
1276         jit_patch(to_end);
1277
1278         jit_retr(LIGHTREC_REG_CYCLE);
1279         jit_epilog();
1280
1281         block->_jit = _jit;
1282         block->opcode_list = NULL;
1283         block->flags = BLOCK_NO_OPCODE_LIST;
1284         block->nb_ops = 0;
1285
1286         block->function = lightrec_emit_code(state, block, _jit,
1287                                              &block->code_size);
1288         if (!block->function)
1289                 goto err_free_block;
1290
1291         state->eob_wrapper_func = jit_address(addr2);
1292         if (OPT_DETECT_IMPOSSIBLE_BRANCHES)
1293                 state->interpreter_func = jit_address(addr4);
1294         if (OPT_HANDLE_LOAD_DELAYS)
1295                 state->ds_check_func = jit_address(addr5);
1296         if (OPT_REPLACE_MEMSET)
1297                 state->memset_func = jit_address(addr3);
1298         state->get_next_block = jit_address(addr);
1299
1300         if (ENABLE_DISASSEMBLER) {
1301                 pr_debug("Dispatcher block:\n");
1302                 jit_disassemble();
1303         }
1304
1305         /* We're done! */
1306         jit_clear_state();
1307         return block;
1308
1309 err_free_block:
1310         lightrec_free(state, MEM_FOR_IR, sizeof(*block), block);
1311 err_no_mem:
1312         pr_err("Unable to compile dispatcher: Out of memory\n");
1313         return NULL;
1314 }
1315
1316 union code lightrec_read_opcode(struct lightrec_state *state, u32 pc)
1317 {
1318         void *host = NULL;
1319
1320         lightrec_get_map(state, &host, kunseg(pc));
1321
1322         const u32 *code = (u32 *)host;
1323         return (union code) LE32TOH(*code);
1324 }
1325
1326 __cnst unsigned int lightrec_cycles_of_opcode(union code code)
1327 {
1328         return 2;
1329 }
1330
1331 void lightrec_free_opcode_list(struct lightrec_state *state, struct opcode *ops)
1332 {
1333         struct opcode_list *list = container_of(ops, struct opcode_list, ops);
1334
1335         lightrec_free(state, MEM_FOR_IR,
1336                       sizeof(*list) + list->nb_ops * sizeof(struct opcode),
1337                       list);
1338 }
1339
1340 static unsigned int lightrec_get_mips_block_len(const u32 *src)
1341 {
1342         unsigned int i;
1343         union code c;
1344
1345         for (i = 1; ; i++) {
1346                 c.opcode = LE32TOH(*src++);
1347
1348                 if (is_syscall(c))
1349                         return i;
1350
1351                 if (is_unconditional_jump(c))
1352                         return i + 1;
1353         }
1354 }
1355
1356 static struct opcode * lightrec_disassemble(struct lightrec_state *state,
1357                                             const u32 *src, unsigned int *len)
1358 {
1359         struct opcode_list *list;
1360         unsigned int i, length;
1361
1362         length = lightrec_get_mips_block_len(src);
1363
1364         list = lightrec_malloc(state, MEM_FOR_IR,
1365                                sizeof(*list) + sizeof(struct opcode) * length);
1366         if (!list) {
1367                 pr_err("Unable to allocate memory\n");
1368                 return NULL;
1369         }
1370
1371         list->nb_ops = (u16) length;
1372
1373         for (i = 0; i < length; i++) {
1374                 list->ops[i].opcode = LE32TOH(src[i]);
1375                 list->ops[i].flags = 0;
1376         }
1377
1378         *len = length * sizeof(u32);
1379
1380         return list->ops;
1381 }
1382
1383 static struct block * lightrec_precompile_block(struct lightrec_state *state,
1384                                                 u32 pc)
1385 {
1386         struct opcode *list;
1387         struct block *block;
1388         void *host, *addr;
1389         const struct lightrec_mem_map *map = lightrec_get_map(state, &host, kunseg(pc));
1390         const u32 *code = (u32 *) host;
1391         unsigned int length;
1392         bool fully_tagged;
1393         u8 block_flags = 0;
1394
1395         if (!map)
1396                 return NULL;
1397
1398         block = lightrec_malloc(state, MEM_FOR_IR, sizeof(*block));
1399         if (!block) {
1400                 pr_err("Unable to recompile block: Out of memory\n");
1401                 return NULL;
1402         }
1403
1404         list = lightrec_disassemble(state, code, &length);
1405         if (!list) {
1406                 lightrec_free(state, MEM_FOR_IR, sizeof(*block), block);
1407                 return NULL;
1408         }
1409
1410         block->pc = pc;
1411         block->_jit = NULL;
1412         block->function = NULL;
1413         block->opcode_list = list;
1414         block->code = code;
1415         block->next = NULL;
1416         block->flags = 0;
1417         block->code_size = 0;
1418         block->precompile_date = state->current_cycle;
1419         block->nb_ops = length / sizeof(u32);
1420
1421         lightrec_optimize(state, block);
1422
1423         length = block->nb_ops * sizeof(u32);
1424
1425         lightrec_register(MEM_FOR_MIPS_CODE, length);
1426
1427         if (ENABLE_DISASSEMBLER) {
1428                 pr_debug("Disassembled block at PC: 0x%08x\n", block->pc);
1429                 lightrec_print_disassembly(block, code);
1430         }
1431
1432         pr_debug("Block size: %hu opcodes\n", block->nb_ops);
1433
1434         fully_tagged = lightrec_block_is_fully_tagged(block);
1435         if (fully_tagged)
1436                 block_flags |= BLOCK_FULLY_TAGGED;
1437
1438         if (block_flags)
1439                 block_set_flags(block, block_flags);
1440
1441         block->hash = lightrec_calculate_block_hash(block);
1442
1443         if (OPT_REPLACE_MEMSET && block_has_flag(block, BLOCK_IS_MEMSET))
1444                 addr = state->memset_func;
1445         else
1446                 addr = state->get_next_block;
1447         lut_write(state, lut_offset(pc), addr);
1448
1449         pr_debug("Blocks created: %u\n", ++state->nb_precompile);
1450
1451         return block;
1452 }
1453
1454 static bool lightrec_block_is_fully_tagged(const struct block *block)
1455 {
1456         const struct opcode *op;
1457         unsigned int i;
1458
1459         for (i = 0; i < block->nb_ops; i++) {
1460                 op = &block->opcode_list[i];
1461
1462                 /* If we have one branch that must be emulated, we cannot trash
1463                  * the opcode list. */
1464                 if (should_emulate(op))
1465                         return false;
1466
1467                 /* Check all loads/stores of the opcode list and mark the
1468                  * block as fully compiled if they all have been tagged. */
1469                 switch (op->c.i.op) {
1470                 case OP_LB:
1471                 case OP_LH:
1472                 case OP_LWL:
1473                 case OP_LW:
1474                 case OP_LBU:
1475                 case OP_LHU:
1476                 case OP_LWR:
1477                 case OP_SB:
1478                 case OP_SH:
1479                 case OP_SWL:
1480                 case OP_SW:
1481                 case OP_SWR:
1482                 case OP_LWC2:
1483                 case OP_SWC2:
1484                         if (!LIGHTREC_FLAGS_GET_IO_MODE(op->flags))
1485                                 return false;
1486                         fallthrough;
1487                 default:
1488                         continue;
1489                 }
1490         }
1491
1492         return true;
1493 }
1494
1495 static void lightrec_reap_block(struct lightrec_state *state, void *data)
1496 {
1497         struct block *block = data;
1498
1499         pr_debug("Reap dead block at PC 0x%08x\n", block->pc);
1500         lightrec_unregister_block(state->block_cache, block);
1501         lightrec_free_block(state, block);
1502 }
1503
1504 static void lightrec_reap_jit(struct lightrec_state *state, void *data)
1505 {
1506         _jit_destroy_state(data);
1507 }
1508
1509 static void lightrec_free_function(struct lightrec_state *state, void *fn)
1510 {
1511         if (ENABLE_CODE_BUFFER && state->tlsf) {
1512                 pr_debug("Freeing code block at 0x%" PRIxPTR "\n", (uintptr_t) fn);
1513                 lightrec_free_code(state, fn);
1514         }
1515 }
1516
1517 static void lightrec_reap_function(struct lightrec_state *state, void *data)
1518 {
1519         lightrec_free_function(state, data);
1520 }
1521
1522 static void lightrec_reap_opcode_list(struct lightrec_state *state, void *data)
1523 {
1524         lightrec_free_opcode_list(state, data);
1525 }
1526
1527 int lightrec_compile_block(struct lightrec_cstate *cstate,
1528                            struct block *block)
1529 {
1530         struct lightrec_state *state = cstate->state;
1531         struct lightrec_branch_target *target;
1532         bool fully_tagged = false;
1533         struct block *block2;
1534         struct opcode *elm;
1535         jit_state_t *_jit, *oldjit;
1536         jit_node_t *start_of_block;
1537         bool skip_next = false;
1538         void *old_fn, *new_fn;
1539         size_t old_code_size;
1540         unsigned int i, j;
1541         u8 old_flags;
1542         u32 offset;
1543
1544         fully_tagged = lightrec_block_is_fully_tagged(block);
1545         if (fully_tagged)
1546                 block_set_flags(block, BLOCK_FULLY_TAGGED);
1547
1548         _jit = jit_new_state();
1549         if (!_jit)
1550                 return -ENOMEM;
1551
1552         oldjit = block->_jit;
1553         old_fn = block->function;
1554         old_code_size = block->code_size;
1555         block->_jit = _jit;
1556
1557         lightrec_regcache_reset(cstate->reg_cache);
1558         lightrec_preload_pc(cstate->reg_cache, _jit);
1559
1560         cstate->cycles = 0;
1561         cstate->nb_local_branches = 0;
1562         cstate->nb_targets = 0;
1563         cstate->no_load_delay = false;
1564
1565         jit_prolog();
1566         jit_tramp(256);
1567
1568         start_of_block = jit_label();
1569
1570         for (i = 0; i < block->nb_ops; i++) {
1571                 elm = &block->opcode_list[i];
1572
1573                 if (skip_next) {
1574                         skip_next = false;
1575                         continue;
1576                 }
1577
1578                 if (should_emulate(elm)) {
1579                         pr_debug("Branch at offset 0x%x will be emulated\n",
1580                                  i << 2);
1581
1582                         lightrec_emit_jump_to_interpreter(cstate, block, i);
1583                         skip_next = !op_flag_no_ds(elm->flags);
1584                 } else {
1585                         lightrec_rec_opcode(cstate, block, i);
1586                         skip_next = !op_flag_no_ds(elm->flags) && has_delay_slot(elm->c);
1587 #if _WIN32
1588                         /* FIXME: GNU Lightning on Windows seems to use our
1589                          * mapped registers as temporaries. Until the actual bug
1590                          * is found and fixed, unconditionally mark our
1591                          * registers as live here. */
1592                         lightrec_regcache_mark_live(cstate->reg_cache, _jit);
1593 #endif
1594                 }
1595
1596                 cstate->cycles += lightrec_cycles_of_opcode(elm->c);
1597         }
1598
1599         for (i = 0; i < cstate->nb_local_branches; i++) {
1600                 struct lightrec_branch *branch = &cstate->local_branches[i];
1601
1602                 pr_debug("Patch local branch to offset 0x%x\n",
1603                          branch->target << 2);
1604
1605                 if (branch->target == 0) {
1606                         jit_patch_at(branch->branch, start_of_block);
1607                         continue;
1608                 }
1609
1610                 for (j = 0; j < cstate->nb_targets; j++) {
1611                         if (cstate->targets[j].offset == branch->target) {
1612                                 jit_patch_at(branch->branch,
1613                                              cstate->targets[j].label);
1614                                 break;
1615                         }
1616                 }
1617
1618                 if (j == cstate->nb_targets)
1619                         pr_err("Unable to find branch target\n");
1620         }
1621
1622         jit_ret();
1623         jit_epilog();
1624
1625         new_fn = lightrec_emit_code(state, block, _jit, &block->code_size);
1626         if (!new_fn) {
1627                 if (!ENABLE_THREADED_COMPILER)
1628                         pr_err("Unable to compile block!\n");
1629                 block->_jit = oldjit;
1630                 jit_clear_state();
1631                 _jit_destroy_state(_jit);
1632                 return -ENOMEM;
1633         }
1634
1635         /* Pause the reaper, because lightrec_reset_lut_offset() may try to set
1636          * the old block->function pointer to the code LUT. */
1637         if (ENABLE_THREADED_COMPILER)
1638                 lightrec_reaper_pause(state->reaper);
1639
1640         block->function = new_fn;
1641         block_clear_flags(block, BLOCK_SHOULD_RECOMPILE);
1642
1643         /* Add compiled function to the LUT */
1644         lut_write(state, lut_offset(block->pc), block->function);
1645
1646         if (ENABLE_THREADED_COMPILER)
1647                 lightrec_reaper_continue(state->reaper);
1648
1649         /* Detect old blocks that have been covered by the new one */
1650         for (i = 0; i < cstate->nb_targets; i++) {
1651                 target = &cstate->targets[i];
1652
1653                 if (!target->offset)
1654                         continue;
1655
1656                 offset = block->pc + target->offset * sizeof(u32);
1657
1658                 /* Pause the reaper while we search for the block until we set
1659                  * the BLOCK_IS_DEAD flag, otherwise the block may be removed
1660                  * under our feet. */
1661                 if (ENABLE_THREADED_COMPILER)
1662                         lightrec_reaper_pause(state->reaper);
1663
1664                 block2 = lightrec_find_block(state->block_cache, offset);
1665                 if (block2) {
1666                         /* No need to check if block2 is compilable - it must
1667                          * be, otherwise block wouldn't be compilable either */
1668
1669                         /* Set the "block dead" flag to prevent the dynarec from
1670                          * recompiling this block */
1671                         old_flags = block_set_flags(block2, BLOCK_IS_DEAD);
1672                 }
1673
1674                 if (ENABLE_THREADED_COMPILER) {
1675                         lightrec_reaper_continue(state->reaper);
1676
1677                         /* If block2 was pending for compilation, cancel it.
1678                          * If it's being compiled right now, wait until it
1679                          * finishes. */
1680                         if (block2)
1681                                 lightrec_recompiler_remove(state->rec, block2);
1682                 }
1683
1684                 /* We know from now on that block2 (if present) isn't going to
1685                  * be compiled. We can override the LUT entry with our new
1686                  * block's entry point. */
1687                 offset = lut_offset(block->pc) + target->offset;
1688                 lut_write(state, offset, jit_address(target->label));
1689
1690                 if (block2) {
1691                         pr_debug("Reap block 0x%08x as it's covered by block "
1692                                  "0x%08x\n", block2->pc, block->pc);
1693
1694                         /* Finally, reap the block. */
1695                         if (!ENABLE_THREADED_COMPILER) {
1696                                 lightrec_unregister_block(state->block_cache, block2);
1697                                 lightrec_free_block(state, block2);
1698                         } else if (!(old_flags & BLOCK_IS_DEAD)) {
1699                                 lightrec_reaper_add(state->reaper,
1700                                                     lightrec_reap_block,
1701                                                     block2);
1702                         }
1703                 }
1704         }
1705
1706         if (ENABLE_DISASSEMBLER) {
1707                 pr_debug("Compiling block at PC: 0x%08x\n", block->pc);
1708                 jit_disassemble();
1709         }
1710
1711         jit_clear_state();
1712
1713         if (fully_tagged)
1714                 old_flags = block_set_flags(block, BLOCK_NO_OPCODE_LIST);
1715
1716         if (fully_tagged && !(old_flags & BLOCK_NO_OPCODE_LIST)) {
1717                 pr_debug("Block PC 0x%08x is fully tagged"
1718                          " - free opcode list\n", block->pc);
1719
1720                 if (ENABLE_THREADED_COMPILER) {
1721                         lightrec_reaper_add(state->reaper,
1722                                             lightrec_reap_opcode_list,
1723                                             block->opcode_list);
1724                 } else {
1725                         lightrec_free_opcode_list(state, block->opcode_list);
1726                 }
1727         }
1728
1729         if (oldjit) {
1730                 pr_debug("Block 0x%08x recompiled, reaping old jit context.\n",
1731                          block->pc);
1732
1733                 if (ENABLE_THREADED_COMPILER) {
1734                         lightrec_reaper_add(state->reaper,
1735                                             lightrec_reap_jit, oldjit);
1736                         lightrec_reaper_add(state->reaper,
1737                                             lightrec_reap_function, old_fn);
1738                 } else {
1739                         _jit_destroy_state(oldjit);
1740                         lightrec_free_function(state, old_fn);
1741                 }
1742
1743                 lightrec_unregister(MEM_FOR_CODE, old_code_size);
1744         }
1745
1746         pr_debug("Blocks compiled: %u\n", ++state->nb_compile);
1747
1748         return 0;
1749 }
1750
1751 static void lightrec_print_info(struct lightrec_state *state)
1752 {
1753         if ((state->current_cycle & ~0xfffffff) != state->old_cycle_counter) {
1754                 pr_info("Lightrec RAM usage: IR %u KiB, CODE %u KiB, "
1755                         "MIPS %u KiB, TOTAL %u KiB, avg. IPI %f\n",
1756                         lightrec_get_mem_usage(MEM_FOR_IR) / 1024,
1757                         lightrec_get_mem_usage(MEM_FOR_CODE) / 1024,
1758                         lightrec_get_mem_usage(MEM_FOR_MIPS_CODE) / 1024,
1759                         lightrec_get_total_mem_usage() / 1024,
1760                        lightrec_get_average_ipi());
1761                 state->old_cycle_counter = state->current_cycle & ~0xfffffff;
1762         }
1763 }
1764
1765 u32 lightrec_execute(struct lightrec_state *state, u32 pc, u32 target_cycle)
1766 {
1767         s32 (*func)(struct lightrec_state *, u32, void *, s32) = (void *)state->dispatcher->function;
1768         void *block_trace;
1769         s32 cycles_delta;
1770
1771         state->exit_flags = LIGHTREC_EXIT_NORMAL;
1772
1773         /* Handle the cycle counter overflowing */
1774         if (unlikely(target_cycle < state->current_cycle))
1775                 target_cycle = UINT_MAX;
1776
1777         state->target_cycle = target_cycle;
1778         state->curr_pc = pc;
1779
1780         block_trace = get_next_block_func(state, pc);
1781         if (block_trace) {
1782                 cycles_delta = state->target_cycle - state->current_cycle;
1783
1784                 cycles_delta = (*func)(state, state->curr_pc,
1785                                        block_trace, cycles_delta);
1786
1787                 state->current_cycle = state->target_cycle - cycles_delta;
1788         }
1789
1790         if (ENABLE_THREADED_COMPILER)
1791                 lightrec_reaper_reap(state->reaper);
1792
1793         if (LOG_LEVEL >= INFO_L)
1794                 lightrec_print_info(state);
1795
1796         return state->curr_pc;
1797 }
1798
1799 u32 lightrec_run_interpreter(struct lightrec_state *state, u32 pc,
1800                              u32 target_cycle)
1801 {
1802         struct block *block;
1803
1804         state->exit_flags = LIGHTREC_EXIT_NORMAL;
1805         state->target_cycle = target_cycle;
1806
1807         do {
1808                 block = lightrec_get_block(state, pc);
1809                 if (!block)
1810                         break;
1811
1812                 pc = lightrec_emulate_block(state, block, pc);
1813
1814                 if (ENABLE_THREADED_COMPILER)
1815                         lightrec_reaper_reap(state->reaper);
1816         } while (state->current_cycle < state->target_cycle);
1817
1818         if (LOG_LEVEL >= INFO_L)
1819                 lightrec_print_info(state);
1820
1821         return pc;
1822 }
1823
1824 void lightrec_free_block(struct lightrec_state *state, struct block *block)
1825 {
1826         u8 old_flags;
1827
1828         lightrec_unregister(MEM_FOR_MIPS_CODE, block->nb_ops * sizeof(u32));
1829         old_flags = block_set_flags(block, BLOCK_NO_OPCODE_LIST);
1830
1831         if (!(old_flags & BLOCK_NO_OPCODE_LIST))
1832                 lightrec_free_opcode_list(state, block->opcode_list);
1833         if (block->_jit)
1834                 _jit_destroy_state(block->_jit);
1835         if (block->function) {
1836                 lightrec_free_function(state, block->function);
1837                 lightrec_unregister(MEM_FOR_CODE, block->code_size);
1838         }
1839         lightrec_free(state, MEM_FOR_IR, sizeof(*block), block);
1840 }
1841
1842 struct lightrec_cstate * lightrec_create_cstate(struct lightrec_state *state)
1843 {
1844         struct lightrec_cstate *cstate;
1845
1846         cstate = lightrec_malloc(state, MEM_FOR_LIGHTREC, sizeof(*cstate));
1847         if (!cstate)
1848                 return NULL;
1849
1850         cstate->reg_cache = lightrec_regcache_init(state);
1851         if (!cstate->reg_cache) {
1852                 lightrec_free(state, MEM_FOR_LIGHTREC, sizeof(*cstate), cstate);
1853                 return NULL;
1854         }
1855
1856         cstate->state = state;
1857
1858         return cstate;
1859 }
1860
1861 void lightrec_free_cstate(struct lightrec_cstate *cstate)
1862 {
1863         lightrec_free_regcache(cstate->reg_cache);
1864         lightrec_free(cstate->state, MEM_FOR_LIGHTREC, sizeof(*cstate), cstate);
1865 }
1866
1867 struct lightrec_state * lightrec_init(char *argv0,
1868                                       const struct lightrec_mem_map *map,
1869                                       size_t nb,
1870                                       const struct lightrec_ops *ops)
1871 {
1872         const struct lightrec_mem_map *codebuf_map = &map[PSX_MAP_CODE_BUFFER];
1873         struct lightrec_state *state;
1874         uintptr_t addr;
1875         void *tlsf = NULL;
1876         bool with_32bit_lut = false;
1877         size_t lut_size;
1878
1879         /* Sanity-check ops */
1880         if (!ops || !ops->cop2_op || !ops->enable_ram) {
1881                 pr_err("Missing callbacks in lightrec_ops structure\n");
1882                 return NULL;
1883         }
1884
1885         if (ops->cop2_notify)
1886                 pr_debug("Optional cop2_notify callback in lightrec_ops\n");
1887         else
1888                 pr_debug("No optional cop2_notify callback in lightrec_ops\n");
1889
1890         if (ENABLE_CODE_BUFFER && nb > PSX_MAP_CODE_BUFFER
1891             && codebuf_map->address) {
1892                 tlsf = tlsf_create_with_pool(codebuf_map->address,
1893                                              codebuf_map->length);
1894                 if (!tlsf) {
1895                         pr_err("Unable to initialize code buffer\n");
1896                         return NULL;
1897                 }
1898
1899                 if (__WORDSIZE == 64) {
1900                         addr = (uintptr_t) codebuf_map->address + codebuf_map->length - 1;
1901                         with_32bit_lut = addr == (u32) addr;
1902                 }
1903         }
1904
1905         if (with_32bit_lut)
1906                 lut_size = CODE_LUT_SIZE * 4;
1907         else
1908                 lut_size = CODE_LUT_SIZE * sizeof(void *);
1909
1910         init_jit(argv0);
1911
1912         state = calloc(1, sizeof(*state) + lut_size);
1913         if (!state)
1914                 goto err_finish_jit;
1915
1916         lightrec_register(MEM_FOR_LIGHTREC, sizeof(*state) + lut_size);
1917
1918         state->tlsf = tlsf;
1919         state->with_32bit_lut = with_32bit_lut;
1920         state->in_delay_slot_n = 0xff;
1921
1922         state->block_cache = lightrec_blockcache_init(state);
1923         if (!state->block_cache)
1924                 goto err_free_state;
1925
1926         if (ENABLE_THREADED_COMPILER) {
1927                 state->rec = lightrec_recompiler_init(state);
1928                 if (!state->rec)
1929                         goto err_free_block_cache;
1930
1931                 state->reaper = lightrec_reaper_init(state);
1932                 if (!state->reaper)
1933                         goto err_free_recompiler;
1934         } else {
1935                 state->cstate = lightrec_create_cstate(state);
1936                 if (!state->cstate)
1937                         goto err_free_block_cache;
1938         }
1939
1940         state->nb_maps = nb;
1941         state->maps = map;
1942
1943         memcpy(&state->ops, ops, sizeof(*ops));
1944
1945         state->dispatcher = generate_dispatcher(state);
1946         if (!state->dispatcher)
1947                 goto err_free_reaper;
1948
1949         state->c_wrapper_block = generate_wrapper(state);
1950         if (!state->c_wrapper_block)
1951                 goto err_free_dispatcher;
1952
1953         state->c_wrappers[C_WRAPPER_RW] = lightrec_rw_cb;
1954         state->c_wrappers[C_WRAPPER_RW_GENERIC] = lightrec_rw_generic_cb;
1955         state->c_wrappers[C_WRAPPER_MFC] = lightrec_mfc_cb;
1956         state->c_wrappers[C_WRAPPER_MTC] = lightrec_mtc_cb;
1957         state->c_wrappers[C_WRAPPER_CP] = lightrec_cp_cb;
1958
1959         map = &state->maps[PSX_MAP_BIOS];
1960         state->offset_bios = (uintptr_t)map->address - map->pc;
1961
1962         map = &state->maps[PSX_MAP_SCRATCH_PAD];
1963         state->offset_scratch = (uintptr_t)map->address - map->pc;
1964
1965         map = &state->maps[PSX_MAP_HW_REGISTERS];
1966         state->offset_io = (uintptr_t)map->address - map->pc;
1967
1968         map = &state->maps[PSX_MAP_KERNEL_USER_RAM];
1969         state->offset_ram = (uintptr_t)map->address - map->pc;
1970
1971         if (state->maps[PSX_MAP_MIRROR1].address == map->address + 0x200000 &&
1972             state->maps[PSX_MAP_MIRROR2].address == map->address + 0x400000 &&
1973             state->maps[PSX_MAP_MIRROR3].address == map->address + 0x600000)
1974                 state->mirrors_mapped = true;
1975
1976         if (state->offset_bios == 0 &&
1977             state->offset_scratch == 0 &&
1978             state->offset_ram == 0 &&
1979             state->offset_io == 0 &&
1980             state->mirrors_mapped) {
1981                 pr_info("Memory map is perfect. Emitted code will be best.\n");
1982         } else {
1983                 pr_info("Memory map is sub-par. Emitted code will be slow.\n");
1984         }
1985
1986         if (state->with_32bit_lut)
1987                 pr_info("Using 32-bit LUT\n");
1988
1989         return state;
1990
1991 err_free_dispatcher:
1992         lightrec_free_block(state, state->dispatcher);
1993 err_free_reaper:
1994         if (ENABLE_THREADED_COMPILER)
1995                 lightrec_reaper_destroy(state->reaper);
1996 err_free_recompiler:
1997         if (ENABLE_THREADED_COMPILER)
1998                 lightrec_free_recompiler(state->rec);
1999         else
2000                 lightrec_free_cstate(state->cstate);
2001 err_free_block_cache:
2002         lightrec_free_block_cache(state->block_cache);
2003 err_free_state:
2004         lightrec_unregister(MEM_FOR_LIGHTREC, sizeof(*state) +
2005                             lut_elm_size(state) * CODE_LUT_SIZE);
2006         free(state);
2007 err_finish_jit:
2008         finish_jit();
2009         if (ENABLE_CODE_BUFFER && tlsf)
2010                 tlsf_destroy(tlsf);
2011         return NULL;
2012 }
2013
2014 void lightrec_destroy(struct lightrec_state *state)
2015 {
2016         /* Force a print info on destroy*/
2017         state->current_cycle = ~state->current_cycle;
2018         lightrec_print_info(state);
2019
2020         lightrec_free_block_cache(state->block_cache);
2021         lightrec_free_block(state, state->dispatcher);
2022         lightrec_free_block(state, state->c_wrapper_block);
2023
2024         if (ENABLE_THREADED_COMPILER) {
2025                 lightrec_free_recompiler(state->rec);
2026                 lightrec_reaper_destroy(state->reaper);
2027         } else {
2028                 lightrec_free_cstate(state->cstate);
2029         }
2030
2031         finish_jit();
2032         if (ENABLE_CODE_BUFFER && state->tlsf)
2033                 tlsf_destroy(state->tlsf);
2034
2035         lightrec_unregister(MEM_FOR_LIGHTREC, sizeof(*state) +
2036                             lut_elm_size(state) * CODE_LUT_SIZE);
2037         free(state);
2038 }
2039
2040 void lightrec_invalidate(struct lightrec_state *state, u32 addr, u32 len)
2041 {
2042         u32 kaddr = kunseg(addr & ~0x3);
2043         enum psx_map idx = lightrec_get_map_idx(state, kaddr);
2044
2045         switch (idx) {
2046         case PSX_MAP_MIRROR1:
2047         case PSX_MAP_MIRROR2:
2048         case PSX_MAP_MIRROR3:
2049                 /* Handle mirrors */
2050                 kaddr &= RAM_SIZE - 1;
2051                 fallthrough;
2052         case PSX_MAP_KERNEL_USER_RAM:
2053                 break;
2054         default:
2055                 return;
2056         }
2057
2058         memset(lut_address(state, lut_offset(kaddr)), 0,
2059                ((len + 3) / 4) * lut_elm_size(state));
2060 }
2061
2062 void lightrec_invalidate_all(struct lightrec_state *state)
2063 {
2064         memset(state->code_lut, 0, lut_elm_size(state) * CODE_LUT_SIZE);
2065 }
2066
2067 void lightrec_set_invalidate_mode(struct lightrec_state *state, bool dma_only)
2068 {
2069         if (state->invalidate_from_dma_only != dma_only)
2070                 lightrec_invalidate_all(state);
2071
2072         state->invalidate_from_dma_only = dma_only;
2073 }
2074
2075 void lightrec_set_exit_flags(struct lightrec_state *state, u32 flags)
2076 {
2077         if (flags != LIGHTREC_EXIT_NORMAL) {
2078                 state->exit_flags |= flags;
2079                 state->target_cycle = state->current_cycle;
2080         }
2081 }
2082
2083 u32 lightrec_exit_flags(struct lightrec_state *state)
2084 {
2085         return state->exit_flags;
2086 }
2087
2088 u32 lightrec_current_cycle_count(const struct lightrec_state *state)
2089 {
2090         return state->current_cycle;
2091 }
2092
2093 void lightrec_reset_cycle_count(struct lightrec_state *state, u32 cycles)
2094 {
2095         state->current_cycle = cycles;
2096
2097         if (state->target_cycle < cycles)
2098                 state->target_cycle = cycles;
2099 }
2100
2101 void lightrec_set_target_cycle_count(struct lightrec_state *state, u32 cycles)
2102 {
2103         if (state->exit_flags == LIGHTREC_EXIT_NORMAL) {
2104                 if (cycles < state->current_cycle)
2105                         cycles = state->current_cycle;
2106
2107                 state->target_cycle = cycles;
2108         }
2109 }
2110
2111 struct lightrec_registers * lightrec_get_registers(struct lightrec_state *state)
2112 {
2113         return &state->regs;
2114 }