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Merge pull request #668 from pcercuei/update-lightrec-20220607
[pcsx_rearmed.git] / deps / lightrec / lightrec.c
CommitLineData
98fa08a5 1// SPDX-License-Identifier: LGPL-2.1-or-later
d16005f8 2/*
98fa08a5 3 * Copyright (C) 2014-2021 Paul Cercueil <paul@crapouillou.net>
d16005f8
PC		 4 */
5
6#include "blockcache.h"
d16005f8
PC		 7#include "debug.h"
8#include "disassembler.h"
9#include "emitter.h"
10#include "interpreter.h"
98fa08a5
PC		 11#include "lightrec-config.h"
12#include "lightning-wrapper.h"
d16005f8
PC		 13#include "lightrec.h"
14#include "memmanager.h"
a59e5536 15#include "reaper.h"
d16005f8
PC		 16#include "recompiler.h"
17#include "regcache.h"
18#include "optimizer.h"
02487de7 19#include "tlsf/tlsf.h"
d16005f8
PC		 20
21#include <errno.h>
98fa08a5 22#include <inttypes.h>
d16005f8
PC		 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>
d16005f8
PC		 30
31#define GENMASK(h, l) \
32 (((uintptr_t)-1 << (l)) & ((uintptr_t)-1 >> (__WORDSIZE - 1 - (h))))
33
34static struct block * lightrec_precompile_block(struct lightrec_state *state,
35 u32 pc);
98fa08a5
PC		 36static bool lightrec_block_is_fully_tagged(const struct block *block);
37
38static void lightrec_mtc2(struct lightrec_state *state, u8 reg, u32 data);
39static u32 lightrec_mfc2(struct lightrec_state *state, u8 reg);
d16005f8 40
a59e5536 41static void lightrec_default_sb(struct lightrec_state *state, u32 opcode,
42 void *host, u32 addr, u8 data)
43{
44 *(u8 *)host = data;
45
46 if (!state->invalidate_from_dma_only)
47 lightrec_invalidate(state, addr, 1);
48}
49
50static void lightrec_default_sh(struct lightrec_state *state, u32 opcode,
51 void *host, u32 addr, u16 data)
52{
53 *(u16 *)host = HTOLE16(data);
54
55 if (!state->invalidate_from_dma_only)
56 lightrec_invalidate(state, addr, 2);
57}
58
59static void lightrec_default_sw(struct lightrec_state *state, u32 opcode,
60 void *host, u32 addr, u32 data)
61{
62 *(u32 *)host = HTOLE32(data);
63
64 if (!state->invalidate_from_dma_only)
65 lightrec_invalidate(state, addr, 4);
66}
67
68static u8 lightrec_default_lb(struct lightrec_state *state,
69 u32 opcode, void *host, u32 addr)
70{
71 return *(u8 *)host;
72}
73
74static u16 lightrec_default_lh(struct lightrec_state *state,
75 u32 opcode, void *host, u32 addr)
76{
77 return LE16TOH(*(u16 *)host);
78}
79
80static u32 lightrec_default_lw(struct lightrec_state *state,
81 u32 opcode, void *host, u32 addr)
82{
83 return LE32TOH(*(u32 *)host);
84}
85
86static const struct lightrec_mem_map_ops lightrec_default_ops = {
87 .sb = lightrec_default_sb,
88 .sh = lightrec_default_sh,
89 .sw = lightrec_default_sw,
90 .lb = lightrec_default_lb,
91 .lh = lightrec_default_lh,
92 .lw = lightrec_default_lw,
93};
94
98fa08a5
PC		 95static void __segfault_cb(struct lightrec_state *state, u32 addr,
96 const struct block *block)
d16005f8
PC		 97{
98 lightrec_set_exit_flags(state, LIGHTREC_EXIT_SEGFAULT);
99 pr_err("Segmentation fault in recompiled code: invalid "
100 "load/store at address 0x%08x\n", addr);
98fa08a5
PC		 101 if (block)
102 pr_err("Was executing block PC 0x%08x\n", block->pc);
d16005f8
PC		 103}
104
a59e5536 105static void lightrec_swl(struct lightrec_state *state,
106 const struct lightrec_mem_map_ops *ops,
107 u32 opcode, void *host, u32 addr, u32 data)
d16005f8 108{
a59e5536 109 unsigned int shift = addr & 0x3;
110 unsigned int mask = GENMASK(31, (shift + 1) * 8);
111 u32 old_data;
112
113 /* Align to 32 bits */
114 addr &= ~3;
115 host = (void *)((uintptr_t)host & ~3);
116
117 old_data = ops->lw(state, opcode, host, addr);
118
119 data = (data >> ((3 - shift) * 8)) | (old_data & mask);
120
121 ops->sw(state, opcode, host, addr, data);
122}
123
124static void lightrec_swr(struct lightrec_state *state,
125 const struct lightrec_mem_map_ops *ops,
126 u32 opcode, void *host, u32 addr, u32 data)
127{
128 unsigned int shift = addr & 0x3;
129 unsigned int mask = (1 << (shift * 8)) - 1;
130 u32 old_data;
131
132 /* Align to 32 bits */
133 addr &= ~3;
134 host = (void *)((uintptr_t)host & ~3);
135
136 old_data = ops->lw(state, opcode, host, addr);
137
138 data = (data << (shift * 8)) | (old_data & mask);
139
140 ops->sw(state, opcode, host, addr, data);
141}
142
143static void lightrec_swc2(struct lightrec_state *state, union code op,
144 const struct lightrec_mem_map_ops *ops,
145 void *host, u32 addr)
146{
98fa08a5 147 u32 data = lightrec_mfc2(state, op.i.rt);
a59e5536 148
149 ops->sw(state, op.opcode, host, addr, data);
150}
151
152static u32 lightrec_lwl(struct lightrec_state *state,
153 const struct lightrec_mem_map_ops *ops,
154 u32 opcode, void *host, u32 addr, u32 data)
155{
156 unsigned int shift = addr & 0x3;
157 unsigned int mask = (1 << (24 - shift * 8)) - 1;
158 u32 old_data;
159
160 /* Align to 32 bits */
161 addr &= ~3;
162 host = (void *)((uintptr_t)host & ~3);
163
164 old_data = ops->lw(state, opcode, host, addr);
165
166 return (data & mask) | (old_data << (24 - shift * 8));
167}
168
169static u32 lightrec_lwr(struct lightrec_state *state,
170 const struct lightrec_mem_map_ops *ops,
171 u32 opcode, void *host, u32 addr, u32 data)
172{
173 unsigned int shift = addr & 0x3;
174 unsigned int mask = GENMASK(31, 32 - shift * 8);
175 u32 old_data;
176
177 /* Align to 32 bits */
178 addr &= ~3;
179 host = (void *)((uintptr_t)host & ~3);
180
181 old_data = ops->lw(state, opcode, host, addr);
182
183 return (data & mask) | (old_data >> (shift * 8));
184}
185
186static void lightrec_lwc2(struct lightrec_state *state, union code op,
187 const struct lightrec_mem_map_ops *ops,
188 void *host, u32 addr)
189{
190 u32 data = ops->lw(state, op.opcode, host, addr);
191
98fa08a5 192 lightrec_mtc2(state, op.i.rt, data);
d16005f8
PC		 193}
194
195static void lightrec_invalidate_map(struct lightrec_state *state,
98fa08a5 196 const struct lightrec_mem_map *map, u32 addr, u32 len)
d16005f8 197{
98fa08a5 198 if (map == &state->maps[PSX_MAP_KERNEL_USER_RAM]) {
02487de7
PC		 199 memset(lut_address(state, lut_offset(addr)), 0,
200 ((len + 3) / 4) * lut_elm_size(state));
98fa08a5 201 }
d16005f8
PC		 202}
203
02487de7
PC		 204enum psx_map
205lightrec_get_map_idx(struct lightrec_state *state, u32 kaddr)
d16005f8 206{
98fa08a5 207 const struct lightrec_mem_map *map;
d16005f8
PC		 208 unsigned int i;
209
210 for (i = 0; i < state->nb_maps; i++) {
02487de7 211 map = &state->maps[i];
d16005f8 212
02487de7
PC		 213 if (kaddr >= map->pc && kaddr < map->pc + map->length)
214 return (enum psx_map) i;
d16005f8
PC		 215 }
216
02487de7
PC		 217 return PSX_MAP_UNKNOWN;
218}
219
220const struct lightrec_mem_map *
221lightrec_get_map(struct lightrec_state *state, void **host, u32 kaddr)
222{
223 const struct lightrec_mem_map *map;
224 enum psx_map idx;
225 u32 addr;
226
227 idx = lightrec_get_map_idx(state, kaddr);
228 if (idx == PSX_MAP_UNKNOWN)
98fa08a5
PC		 229 return NULL;
230
02487de7 231 map = &state->maps[idx];
98fa08a5
PC		 232 addr = kaddr - map->pc;
233
234 while (map->mirror_of)
235 map = map->mirror_of;
236
237 if (host)
238 *host = map->address + addr;
239
240 return map;
d16005f8
PC		 241}
242
243u32 lightrec_rw(struct lightrec_state *state, union code op,
98fa08a5 244 u32 addr, u32 data, u16 *flags, struct block *block)
d16005f8
PC		 245{
246 const struct lightrec_mem_map *map;
a59e5536 247 const struct lightrec_mem_map_ops *ops;
98fa08a5 248 u32 opcode = op.opcode;
a59e5536 249 void *host;
d16005f8
PC		 250
251 addr += (s16) op.i.imm;
d16005f8 252
98fa08a5 253 map = lightrec_get_map(state, &host, kunseg(addr));
d16005f8 254 if (!map) {
98fa08a5 255 __segfault_cb(state, addr, block);
d16005f8
PC		 256 return 0;
257 }
258
d16005f8 259 if (unlikely(map->ops)) {
22eee2ac
PC		 260 if (flags && !LIGHTREC_FLAGS_GET_IO_MODE(*flags))
261 *flags |= LIGHTREC_IO_MODE(LIGHTREC_IO_HW);
d16005f8 262
a59e5536 263 ops = map->ops;
264 } else {
22eee2ac
PC		 265 if (flags && !LIGHTREC_FLAGS_GET_IO_MODE(*flags))
266 *flags |= LIGHTREC_IO_MODE(LIGHTREC_IO_DIRECT);
d16005f8 267
a59e5536 268 ops = &lightrec_default_ops;
269 }
d16005f8
PC		 270
271 switch (op.i.op) {
272 case OP_SB:
a59e5536 273 ops->sb(state, opcode, host, addr, (u8) data);
d16005f8
PC		 274 return 0;
275 case OP_SH:
a59e5536 276 ops->sh(state, opcode, host, addr, (u16) data);
d16005f8
PC		 277 return 0;
278 case OP_SWL:
a59e5536 279 lightrec_swl(state, ops, opcode, host, addr, data);
d16005f8
PC		 280 return 0;
281 case OP_SWR:
a59e5536 282 lightrec_swr(state, ops, opcode, host, addr, data);
d16005f8
PC		 283 return 0;
284 case OP_SW:
a59e5536 285 ops->sw(state, opcode, host, addr, data);
d16005f8
PC		 286 return 0;
287 case OP_SWC2:
a59e5536 288 lightrec_swc2(state, op, ops, host, addr);
d16005f8
PC		 289 return 0;
290 case OP_LB:
a59e5536 291 return (s32) (s8) ops->lb(state, opcode, host, addr);
d16005f8 292 case OP_LBU:
a59e5536 293 return ops->lb(state, opcode, host, addr);
d16005f8 294 case OP_LH:
a59e5536 295 return (s32) (s16) ops->lh(state, opcode, host, addr);
d16005f8 296 case OP_LHU:
a59e5536 297 return ops->lh(state, opcode, host, addr);
d16005f8 298 case OP_LWC2:
a59e5536 299 lightrec_lwc2(state, op, ops, host, addr);
d16005f8 300 return 0;
a59e5536 301 case OP_LWL:
302 return lightrec_lwl(state, ops, opcode, host, addr, data);
303 case OP_LWR:
304 return lightrec_lwr(state, ops, opcode, host, addr, data);
d16005f8
PC		 305 case OP_LW:
306 default:
a59e5536 307 return ops->lw(state, opcode, host, addr);
d16005f8
PC		 308 }
309}
310
311static void lightrec_rw_helper(struct lightrec_state *state,
98fa08a5
PC		 312 union code op, u16 *flags,
313 struct block *block)
d16005f8 314{
98fa08a5
PC		 315 u32 ret = lightrec_rw(state, op, state->regs.gpr[op.i.rs],
316 state->regs.gpr[op.i.rt], flags, block);
d16005f8
PC		 317
318 switch (op.i.op) {
319 case OP_LB:
320 case OP_LBU:
321 case OP_LH:
322 case OP_LHU:
323 case OP_LWL:
324 case OP_LWR:
325 case OP_LW:
326 if (op.i.rt)
98fa08a5 327 state->regs.gpr[op.i.rt] = ret;
d8b04acd
PC		 328 fallthrough;
329 default:
d16005f8
PC		 330 break;
331 }
332}
333
22eee2ac 334static void lightrec_rw_cb(struct lightrec_state *state)
d16005f8 335{
22eee2ac 336 lightrec_rw_helper(state, (union code)state->c_wrapper_arg, NULL, NULL);
d16005f8
PC		 337}
338
22eee2ac 339static void lightrec_rw_generic_cb(struct lightrec_state *state)
d16005f8 340{
98fa08a5
PC		 341 struct block *block;
342 struct opcode *op;
343 bool was_tagged;
22eee2ac 344 u32 arg = state->c_wrapper_arg;
98fa08a5
PC		 345 u16 offset = (u16)arg;
346
347 block = lightrec_find_block_from_lut(state->block_cache,
348 arg >> 16, state->next_pc);
349 if (unlikely(!block)) {
350 pr_err("rw_generic: No block found in LUT for PC 0x%x offset 0x%x\n",
351 state->next_pc, offset);
352 return;
353 }
354
355 op = &block->opcode_list[offset];
22eee2ac 356 was_tagged = LIGHTREC_FLAGS_GET_IO_MODE(op->flags);
d16005f8 357
98fa08a5 358 lightrec_rw_helper(state, op->c, &op->flags, block);
d16005f8
PC		 359
360 if (!was_tagged) {
98fa08a5
PC		 361 pr_debug("Opcode of block at PC 0x%08x has been tagged - flag "
362 "for recompilation\n", block->pc);
d16005f8 363
a59e5536 364 block->flags |= BLOCK_SHOULD_RECOMPILE;
d16005f8
PC		 365 }
366}
367
98fa08a5 368static u32 clamp_s32(s32 val, s32 min, s32 max)
d16005f8 369{
98fa08a5
PC		 370 return val < min ? min : val > max ? max : val;
371}
d16005f8 372
11357fef
PC		 373static u16 load_u16(u32 *ptr)
374{
375 return ((struct u16x2 *) ptr)->l;
376}
377
378static void store_u16(u32 *ptr, u16 value)
379{
380 ((struct u16x2 *) ptr)->l = value;
381}
382
98fa08a5
PC		 383static u32 lightrec_mfc2(struct lightrec_state *state, u8 reg)
384{
385 s16 gteir1, gteir2, gteir3;
386
387 switch (reg) {
388 case 1:
389 case 3:
390 case 5:
391 case 8:
392 case 9:
393 case 10:
394 case 11:
11357fef 395 return (s32)(s16) load_u16(&state->regs.cp2d[reg]);
98fa08a5
PC		 396 case 7:
397 case 16:
398 case 17:
399 case 18:
400 case 19:
11357fef 401 return load_u16(&state->regs.cp2d[reg]);
98fa08a5
PC		 402 case 28:
403 case 29:
11357fef
PC		 404 gteir1 = (s16) load_u16(&state->regs.cp2d[9]);
405 gteir2 = (s16) load_u16(&state->regs.cp2d[10]);
406 gteir3 = (s16) load_u16(&state->regs.cp2d[11]);
98fa08a5
PC		 407
408 return clamp_s32(gteir1 >> 7, 0, 0x1f) << 0 |
409 clamp_s32(gteir2 >> 7, 0, 0x1f) << 5 |
410 clamp_s32(gteir3 >> 7, 0, 0x1f) << 10;
411 case 15:
412 reg = 14;
d8b04acd
PC		 413 fallthrough;
414 default:
98fa08a5
PC		 415 return state->regs.cp2d[reg];
416 }
417}
d16005f8 418
98fa08a5
PC		 419u32 lightrec_mfc(struct lightrec_state *state, union code op)
420{
421 if (op.i.op == OP_CP0)
422 return state->regs.cp0[op.r.rd];
423 else if (op.r.rs == OP_CP2_BASIC_MFC2)
424 return lightrec_mfc2(state, op.r.rd);
d16005f8 425 else
98fa08a5 426 return state->regs.cp2c[op.r.rd];
d16005f8
PC		 427}
428
98fa08a5 429static void lightrec_mtc0(struct lightrec_state *state, u8 reg, u32 data)
d16005f8 430{
fd58fa32 431 u32 status, oldstatus, cause;
98fa08a5
PC		 432
433 switch (reg) {
434 case 1:
435 case 4:
436 case 8:
437 case 14:
438 case 15:
439 /* Those registers are read-only */
440 return;
fd58fa32 441 default:
98fa08a5
PC		 442 break;
443 }
d16005f8 444
98fa08a5
PC		 445 if (reg == 12) {
446 status = state->regs.cp0[12];
fd58fa32 447 oldstatus = status;
d16005f8 448
98fa08a5
PC		 449 if (status & ~data & BIT(16)) {
450 state->ops.enable_ram(state, true);
451 lightrec_invalidate_all(state);
452 } else if (~status & data & BIT(16)) {
453 state->ops.enable_ram(state, false);
454 }
455 }
456
fd58fa32
PC		 457 if (reg == 13) {
458 state->regs.cp0[13] &= ~0x300;
459 state->regs.cp0[13] |= data & 0x300;
460 } else {
461 state->regs.cp0[reg] = data;
462 }
98fa08a5
PC		 463
464 if (reg == 12 || reg == 13) {
465 cause = state->regs.cp0[13];
466 status = state->regs.cp0[12];
467
fd58fa32 468 /* Handle software interrupts */
98fa08a5
PC		 469 if (!!(status & cause & 0x300) & status)
470 lightrec_set_exit_flags(state, LIGHTREC_EXIT_CHECK_INTERRUPT);
fd58fa32
PC		 471
472 /* Handle hardware interrupts */
473 if (reg == 12 && !(~status & 0x401) && (~oldstatus & 0x401))
474 lightrec_set_exit_flags(state, LIGHTREC_EXIT_CHECK_INTERRUPT);
98fa08a5
PC		 475 }
476}
477
478static u32 count_leading_bits(s32 data)
479{
98fa08a5
PC		 480 u32 cnt = 33;
481
de742fa0
PC		 482#ifdef __has_builtin
483#if __has_builtin(__builtin_clrsb)
484 return 1 + __builtin_clrsb(data);
485#endif
486#endif
487
98fa08a5
PC		 488 data = (data ^ (data >> 31)) << 1;
489
490 do {
491 cnt -= 1;
492 data >>= 1;
493 } while (data);
494
495 return cnt;
98fa08a5
PC		 496}
497
498static void lightrec_mtc2(struct lightrec_state *state, u8 reg, u32 data)
499{
500 switch (reg) {
501 case 15:
502 state->regs.cp2d[12] = state->regs.cp2d[13];
503 state->regs.cp2d[13] = state->regs.cp2d[14];
504 state->regs.cp2d[14] = data;
505 break;
506 case 28:
507 state->regs.cp2d[9] = (data << 7) & 0xf80;
508 state->regs.cp2d[10] = (data << 2) & 0xf80;
509 state->regs.cp2d[11] = (data >> 3) & 0xf80;
510 break;
511 case 31:
512 return;
513 case 30:
514 state->regs.cp2d[31] = count_leading_bits((s32) data);
d8b04acd
PC		 515 fallthrough;
516 default:
98fa08a5
PC		 517 state->regs.cp2d[reg] = data;
518 break;
519 }
520}
d16005f8 521
98fa08a5
PC		 522static void lightrec_ctc2(struct lightrec_state *state, u8 reg, u32 data)
523{
524 switch (reg) {
525 case 4:
526 case 12:
527 case 20:
528 case 26:
529 case 27:
530 case 29:
531 case 30:
11357fef 532 store_u16(&state->regs.cp2c[reg], data);
98fa08a5
PC		 533 break;
534 case 31:
535 data = (data & 0x7ffff000) | !!(data & 0x7f87e000) << 31;
d8b04acd
PC		 536 fallthrough;
537 default:
11357fef 538 state->regs.cp2c[reg] = data;
98fa08a5
PC		 539 break;
540 }
98fa08a5
PC		 541}
542
543void lightrec_mtc(struct lightrec_state *state, union code op, u32 data)
544{
545 if (op.i.op == OP_CP0)
546 lightrec_mtc0(state, op.r.rd, data);
547 else if (op.r.rs == OP_CP2_BASIC_CTC2)
548 lightrec_ctc2(state, op.r.rd, data);
549 else
550 lightrec_mtc2(state, op.r.rd, data);
d16005f8
PC		 551}
552
22eee2ac 553static void lightrec_mtc_cb(struct lightrec_state *state)
d16005f8 554{
22eee2ac
PC		 555 union code op = (union code) state->c_wrapper_arg;
556
98fa08a5 557 lightrec_mtc(state, op, state->regs.gpr[op.r.rt]);
d16005f8
PC		 558}
559
98fa08a5 560void lightrec_rfe(struct lightrec_state *state)
d16005f8
PC		 561{
562 u32 status;
563
564 /* Read CP0 Status register (r12) */
98fa08a5 565 status = state->regs.cp0[12];
d16005f8
PC		 566
567 /* Switch the bits */
568 status = ((status & 0x3c) >> 2) | (status & ~0xf);
569
570 /* Write it back */
98fa08a5 571 lightrec_mtc0(state, 12, status);
d16005f8
PC		 572}
573
98fa08a5 574void lightrec_cp(struct lightrec_state *state, union code op)
d16005f8 575{
98fa08a5
PC		 576 if (op.i.op == OP_CP0) {
577 pr_err("Invalid CP opcode to coprocessor #0\n");
578 return;
579 }
d16005f8 580
98fa08a5 581 (*state->ops.cop2_op)(state, op.opcode);
d16005f8
PC		 582}
583
22eee2ac
PC		 584static void lightrec_cp_cb(struct lightrec_state *state)
585{
586 lightrec_cp(state, (union code) state->c_wrapper_arg);
587}
588
589static void lightrec_syscall_cb(struct lightrec_state *state)
d16005f8
PC		 590{
591 lightrec_set_exit_flags(state, LIGHTREC_EXIT_SYSCALL);
592}
593
22eee2ac 594static void lightrec_break_cb(struct lightrec_state *state)
d16005f8
PC		 595{
596 lightrec_set_exit_flags(state, LIGHTREC_EXIT_BREAK);
597}
598
599struct block * lightrec_get_block(struct lightrec_state *state, u32 pc)
600{
601 struct block *block = lightrec_find_block(state->block_cache, pc);
602
98fa08a5 603 if (block && lightrec_block_is_outdated(state, block)) {
d16005f8
PC		 604 pr_debug("Block at PC 0x%08x is outdated!\n", block->pc);
605
606 /* Make sure the recompiler isn't processing the block we'll
607 * destroy */
608 if (ENABLE_THREADED_COMPILER)
609 lightrec_recompiler_remove(state->rec, block);
610
611 lightrec_unregister_block(state->block_cache, block);
a59e5536 612 remove_from_code_lut(state->block_cache, block);
98fa08a5 613 lightrec_free_block(state, block);
d16005f8
PC		 614 block = NULL;
615 }
616
617 if (!block) {
618 block = lightrec_precompile_block(state, pc);
619 if (!block) {
620 pr_err("Unable to recompile block at PC 0x%x\n", pc);
621 lightrec_set_exit_flags(state, LIGHTREC_EXIT_SEGFAULT);
622 return NULL;
623 }
624
625 lightrec_register_block(state->block_cache, block);
626 }
627
628 return block;
629}
630
631static void * get_next_block_func(struct lightrec_state *state, u32 pc)
632{
633 struct block *block;
634 bool should_recompile;
635 void *func;
d8b04acd 636 int err;
d16005f8
PC		 637
638 for (;;) {
d8b04acd 639 func = lut_read(state, lut_offset(pc));
d16005f8 640 if (func && func != state->get_next_block)
98fa08a5 641 break;
d16005f8
PC		 642
643 block = lightrec_get_block(state, pc);
644
645 if (unlikely(!block))
98fa08a5
PC		 646 break;
647
648 if (OPT_REPLACE_MEMSET && (block->flags & BLOCK_IS_MEMSET)) {
649 func = state->memset_func;
650 break;
651 }
d16005f8 652
a59e5536 653 should_recompile = block->flags & BLOCK_SHOULD_RECOMPILE &&
654 !(block->flags & BLOCK_IS_DEAD);
d16005f8
PC		 655
656 if (unlikely(should_recompile)) {
a59e5536 657 pr_debug("Block at PC 0x%08x should recompile\n", pc);
d16005f8 658
d16005f8 659 lightrec_unregister(MEM_FOR_CODE, block->code_size);
a59e5536 660
d8b04acd 661 if (ENABLE_THREADED_COMPILER) {
a59e5536 662 lightrec_recompiler_add(state->rec, block);
d8b04acd
PC		 663 } else {
664 err = lightrec_compile_block(state->cstate, block);
665 if (err) {
666 state->exit_flags = LIGHTREC_EXIT_NOMEM;
667 return NULL;
668 }
669 }
d16005f8
PC		 670 }
671
672 if (ENABLE_THREADED_COMPILER && likely(!should_recompile))
98fa08a5 673 func = lightrec_recompiler_run_first_pass(state, block, &pc);
d16005f8
PC		 674 else
675 func = block->function;
676
677 if (likely(func))
98fa08a5 678 break;
d16005f8 679
98fa08a5
PC		 680 if (unlikely(block->flags & BLOCK_NEVER_COMPILE)) {
681 pc = lightrec_emulate_block(state, block, pc);
682
683 } else if (!ENABLE_THREADED_COMPILER) {
684 /* Block wasn't compiled yet - run the interpreter */
685 if (block->flags & BLOCK_FULLY_TAGGED)
686 pr_debug("Block fully tagged, skipping first pass\n");
687 else if (ENABLE_FIRST_PASS && likely(!should_recompile))
688 pc = lightrec_emulate_block(state, block, pc);
d16005f8 689
d16005f8 690 /* Then compile it using the profiled data */
d8b04acd
PC		 691 err = lightrec_compile_block(state->cstate, block);
692 if (err) {
693 state->exit_flags = LIGHTREC_EXIT_NOMEM;
694 return NULL;
695 }
98fa08a5
PC		 696 } else {
697 lightrec_recompiler_add(state->rec, block);
d16005f8
PC		 698 }
699
700 if (state->exit_flags != LIGHTREC_EXIT_NORMAL ||
98fa08a5
PC		 701 state->current_cycle >= state->target_cycle)
702 break;
d16005f8 703 }
d16005f8 704
98fa08a5
PC		 705 state->next_pc = pc;
706 return func;
d16005f8
PC		 707}
708
709static s32 c_function_wrapper(struct lightrec_state *state, s32 cycles_delta,
22eee2ac 710 void (*f)(struct lightrec_state *))
d16005f8
PC		 711{
712 state->current_cycle = state->target_cycle - cycles_delta;
713
22eee2ac 714 (*f)(state);
d16005f8
PC		 715
716 return state->target_cycle - state->current_cycle;
717}
718
d8b04acd
PC		 719static void * lightrec_alloc_code(struct lightrec_state *state, size_t size)
720{
721 void *code;
722
723 if (ENABLE_THREADED_COMPILER)
724 lightrec_code_alloc_lock(state);
725
726 code = tlsf_malloc(state->tlsf, size);
727
728 if (ENABLE_THREADED_COMPILER)
729 lightrec_code_alloc_unlock(state);
730
731 return code;
732}
733
734static void lightrec_realloc_code(struct lightrec_state *state,
735 void *ptr, size_t size)
736{
737 /* NOTE: 'size' MUST be smaller than the size specified during
738 * the allocation. */
739
740 if (ENABLE_THREADED_COMPILER)
741 lightrec_code_alloc_lock(state);
742
743 tlsf_realloc(state->tlsf, ptr, size);
744
745 if (ENABLE_THREADED_COMPILER)
746 lightrec_code_alloc_unlock(state);
747}
748
749static void lightrec_free_code(struct lightrec_state *state, void *ptr)
750{
751 if (ENABLE_THREADED_COMPILER)
752 lightrec_code_alloc_lock(state);
753
754 tlsf_free(state->tlsf, ptr);
755
756 if (ENABLE_THREADED_COMPILER)
757 lightrec_code_alloc_unlock(state);
758}
759
02487de7 760static void * lightrec_emit_code(struct lightrec_state *state,
d8b04acd 761 const struct block *block,
02487de7
PC		 762 jit_state_t *_jit, unsigned int *size)
763{
764 bool has_code_buffer = ENABLE_CODE_BUFFER && state->tlsf;
765 jit_word_t code_size, new_code_size;
766 void *code;
767
768 jit_realize();
769
770 if (!ENABLE_DISASSEMBLER)
771 jit_set_data(NULL, 0, JIT_DISABLE_DATA | JIT_DISABLE_NOTE);
772
773 if (has_code_buffer) {
774 jit_get_code(&code_size);
d8b04acd
PC		 775 code = lightrec_alloc_code(state, (size_t) code_size);
776
777 if (!code) {
778 if (ENABLE_THREADED_COMPILER) {
779 /* If we're using the threaded compiler, return
780 * an allocation error here. The threaded
781 * compiler will then empty its job queue and
782 * request a code flush using the reaper. */
783 return NULL;
784 }
785
786 /* Remove outdated blocks, and try again */
787 lightrec_remove_outdated_blocks(state->block_cache, block);
788
789 pr_debug("Re-try to alloc %zu bytes...\n", code_size);
790
791 code = lightrec_alloc_code(state, code_size);
792 if (!code) {
793 pr_err("Could not alloc even after removing old blocks!\n");
794 return NULL;
795 }
796 }
02487de7
PC		 797
798 jit_set_code(code, code_size);
799 }
800
801 code = jit_emit();
802
803 jit_get_code(&new_code_size);
804 lightrec_register(MEM_FOR_CODE, new_code_size);
805
806 if (has_code_buffer) {
d8b04acd 807 lightrec_realloc_code(state, code, (size_t) new_code_size);
02487de7
PC		 808
809 pr_debug("Creating code block at address 0x%" PRIxPTR ", "
810 "code size: %" PRIuPTR " new: %" PRIuPTR "\n",
811 (uintptr_t) code, code_size, new_code_size);
812 }
813
814 *size = (unsigned int) new_code_size;
815
816 return code;
817}
818
98fa08a5 819static struct block * generate_wrapper(struct lightrec_state *state)
d16005f8
PC		 820{
821 struct block *block;
822 jit_state_t *_jit;
823 unsigned int i;
824 int stack_ptr;
d16005f8 825 jit_node_t *to_tramp, *to_fn_epilog;
fd58fa32 826 jit_node_t *addr[C_WRAPPERS_COUNT - 1];
d16005f8
PC		 827
828 block = lightrec_malloc(state, MEM_FOR_IR, sizeof(*block));
829 if (!block)
830 goto err_no_mem;
831
832 _jit = jit_new_state();
833 if (!_jit)
834 goto err_free_block;
835
836 jit_name("RW wrapper");
837 jit_note(__FILE__, __LINE__);
838
839 /* Wrapper entry point */
840 jit_prolog();
fd58fa32
PC		 841 jit_tramp(256);
842
843 /* Add entry points; separate them by opcodes that increment
844 * LIGHTREC_REG_STATE (since we cannot touch other registers).
845 * The difference will then tell us which C function to call. */
846 for (i = C_WRAPPERS_COUNT - 1; i > 0; i--) {
847 jit_addi(LIGHTREC_REG_STATE, LIGHTREC_REG_STATE, __WORDSIZE / 8);
848 addr[i - 1] = jit_indirect();
849 }
850
851 jit_epilog();
852 jit_prolog();
d16005f8
PC		 853
854 stack_ptr = jit_allocai(sizeof(uintptr_t) * NUM_TEMPS);
855
fd58fa32 856 /* Save all temporaries on stack */
d16005f8
PC		 857 for (i = 0; i < NUM_TEMPS; i++)
858 jit_stxi(stack_ptr + i * sizeof(uintptr_t), JIT_FP, JIT_R(i));
859
860 /* Jump to the trampoline */
861 to_tramp = jit_jmpi();
862
863 /* The trampoline will jump back here */
864 to_fn_epilog = jit_label();
865
fd58fa32 866 /* Restore temporaries from stack */
d16005f8
PC		 867 for (i = 0; i < NUM_TEMPS; i++)
868 jit_ldxi(JIT_R(i), JIT_FP, stack_ptr + i * sizeof(uintptr_t));
869
870 jit_ret();
871 jit_epilog();
872
873 /* Trampoline entry point.
874 * The sole purpose of the trampoline is to cheese Lightning not to
875 * save/restore the callee-saved register LIGHTREC_REG_CYCLE, since we
876 * do want to return to the caller with this register modified. */
877 jit_prolog();
878 jit_tramp(256);
879 jit_patch(to_tramp);
880
fd58fa32
PC		 881 /* Retrieve the wrapper function */
882 jit_ldxi(JIT_R0, LIGHTREC_REG_STATE,
883 offsetof(struct lightrec_state, c_wrappers));
884
885 /* Restore LIGHTREC_REG_STATE to its correct value */
886 jit_movi(LIGHTREC_REG_STATE, (uintptr_t) state);
887
d16005f8
PC		 888 jit_prepare();
889 jit_pushargr(LIGHTREC_REG_STATE);
890 jit_pushargr(LIGHTREC_REG_CYCLE);
d16005f8 891 jit_pushargr(JIT_R0);
98fa08a5 892 jit_finishi(c_function_wrapper);
d16005f8 893 jit_retval_i(LIGHTREC_REG_CYCLE);
d16005f8
PC		 894
895 jit_patch_at(jit_jmpi(), to_fn_epilog);
896 jit_epilog();
897
d16005f8 898 block->_jit = _jit;
d16005f8
PC		 899 block->opcode_list = NULL;
900 block->flags = 0;
901 block->nb_ops = 0;
902
d8b04acd 903 block->function = lightrec_emit_code(state, block, _jit,
02487de7
PC		 904 &block->code_size);
905 if (!block->function)
906 goto err_free_block;
907
fd58fa32
PC		 908 state->wrappers_eps[C_WRAPPERS_COUNT - 1] = block->function;
909
910 for (i = 0; i < C_WRAPPERS_COUNT - 1; i++)
911 state->wrappers_eps[i] = jit_address(addr[i]);
912
d16005f8
PC		 913 if (ENABLE_DISASSEMBLER) {
914 pr_debug("Wrapper block:\n");
915 jit_disassemble();
916 }
917
918 jit_clear_state();
919 return block;
920
921err_free_block:
922 lightrec_free(state, MEM_FOR_IR, sizeof(*block), block);
923err_no_mem:
924 pr_err("Unable to compile wrapper: Out of memory\n");
925 return NULL;
926}
927
98fa08a5
PC		 928static u32 lightrec_memset(struct lightrec_state *state)
929{
930 u32 kunseg_pc = kunseg(state->regs.gpr[4]);
931 void *host;
932 const struct lightrec_mem_map *map = lightrec_get_map(state, &host, kunseg_pc);
933 u32 length = state->regs.gpr[5] * 4;
934
935 if (!map) {
936 pr_err("Unable to find memory map for memset target address "
937 "0x%x\n", kunseg_pc);
938 return 0;
939 }
940
941 pr_debug("Calling host memset, PC 0x%x (host address 0x%" PRIxPTR ") for %u bytes\n",
942 kunseg_pc, (uintptr_t)host, length);
943 memset(host, 0, length);
944
945 if (!state->invalidate_from_dma_only)
946 lightrec_invalidate_map(state, map, kunseg_pc, length);
947
948 /* Rough estimation of the number of cycles consumed */
949 return 8 + 5 * (length + 3 / 4);
950}
951
d16005f8
PC		 952static struct block * generate_dispatcher(struct lightrec_state *state)
953{
954 struct block *block;
955 jit_state_t *_jit;
02487de7 956 jit_node_t *to_end, *loop, *addr, *addr2, *addr3;
d16005f8 957 unsigned int i;
02487de7 958 u32 offset;
d16005f8
PC		 959
960 block = lightrec_malloc(state, MEM_FOR_IR, sizeof(*block));
961 if (!block)
962 goto err_no_mem;
963
964 _jit = jit_new_state();
965 if (!_jit)
966 goto err_free_block;
967
968 jit_name("dispatcher");
969 jit_note(__FILE__, __LINE__);
970
971 jit_prolog();
972 jit_frame(256);
973
974 jit_getarg(JIT_R0, jit_arg());
d16005f8 975 jit_getarg_i(LIGHTREC_REG_CYCLE, jit_arg());
d16005f8
PC		 976
977 /* Force all callee-saved registers to be pushed on the stack */
978 for (i = 0; i < NUM_REGS; i++)
979 jit_movr(JIT_V(i), JIT_V(i));
980
981 /* Pass lightrec_state structure to blocks, using the last callee-saved
982 * register that Lightning provides */
983 jit_movi(LIGHTREC_REG_STATE, (intptr_t) state);
984
985 loop = jit_label();
986
987 /* Call the block's code */
988 jit_jmpr(JIT_R0);
989
98fa08a5
PC		 990 if (OPT_REPLACE_MEMSET) {
991 /* Blocks will jump here when they need to call
992 * lightrec_memset() */
993 addr3 = jit_indirect();
994
995 jit_prepare();
996 jit_pushargr(LIGHTREC_REG_STATE);
997 jit_finishi(lightrec_memset);
998
999 jit_ldxi_ui(JIT_V0, LIGHTREC_REG_STATE,
1000 offsetof(struct lightrec_state, regs.gpr[31]));
1001
1002 jit_retval(JIT_R0);
1003 jit_subr(LIGHTREC_REG_CYCLE, LIGHTREC_REG_CYCLE, JIT_R0);
1004 }
1005
d16005f8
PC		 1006 /* The block will jump here, with the number of cycles remaining in
1007 * LIGHTREC_REG_CYCLE */
1008 addr2 = jit_indirect();
1009
98fa08a5
PC		 1010 /* Store back the next_pc to the lightrec_state structure */
1011 offset = offsetof(struct lightrec_state, next_pc);
1012 jit_stxi_i(offset, LIGHTREC_REG_STATE, JIT_V0);
1013
d16005f8
PC		 1014 /* Jump to end if state->target_cycle < state->current_cycle */
1015 to_end = jit_blei(LIGHTREC_REG_CYCLE, 0);
1016
1017 /* Convert next PC to KUNSEG and avoid mirrors */
02487de7
PC		 1018 jit_andi(JIT_R0, JIT_V0, 0x10000000 | (RAM_SIZE - 1));
1019 jit_rshi_u(JIT_R1, JIT_R0, 28);
1020 jit_andi(JIT_R2, JIT_V0, BIOS_SIZE - 1);
1021 jit_addi(JIT_R2, JIT_R2, RAM_SIZE);
1022 jit_movnr(JIT_R0, JIT_R2, JIT_R1);
1023
1024 /* If possible, use the code LUT */
1025 if (!lut_is_32bit(state))
98fa08a5 1026 jit_lshi(JIT_R0, JIT_R0, 1);
d16005f8 1027 jit_addr(JIT_R0, JIT_R0, LIGHTREC_REG_STATE);
02487de7
PC		 1028
1029 offset = offsetof(struct lightrec_state, code_lut);
1030 if (lut_is_32bit(state))
1031 jit_ldxi_ui(JIT_R0, JIT_R0, offset);
1032 else
1033 jit_ldxi(JIT_R0, JIT_R0, offset);
d16005f8
PC		 1034
1035 /* If we get non-NULL, loop */
1036 jit_patch_at(jit_bnei(JIT_R0, 0), loop);
1037
1038 /* Slow path: call C function get_next_block_func() */
d16005f8 1039
98fa08a5 1040 if (ENABLE_FIRST_PASS || OPT_DETECT_IMPOSSIBLE_BRANCHES) {
d16005f8
PC		 1041 /* We may call the interpreter - update state->current_cycle */
1042 jit_ldxi_i(JIT_R2, LIGHTREC_REG_STATE,
1043 offsetof(struct lightrec_state, target_cycle));
1044 jit_subr(JIT_R1, JIT_R2, LIGHTREC_REG_CYCLE);
1045 jit_stxi_i(offsetof(struct lightrec_state, current_cycle),
1046 LIGHTREC_REG_STATE, JIT_R1);
1047 }
1048
1049 /* The code LUT will be set to this address when the block at the target
1050 * PC has been preprocessed but not yet compiled by the threaded
1051 * recompiler */
1052 addr = jit_indirect();
1053
1054 /* Get the next block */
1055 jit_prepare();
1056 jit_pushargr(LIGHTREC_REG_STATE);
1057 jit_pushargr(JIT_V0);
1058 jit_finishi(&get_next_block_func);
1059 jit_retval(JIT_R0);
1060
98fa08a5 1061 if (ENABLE_FIRST_PASS || OPT_DETECT_IMPOSSIBLE_BRANCHES) {
d16005f8
PC		 1062 /* The interpreter may have updated state->current_cycle and
1063 * state->target_cycle - recalc the delta */
1064 jit_ldxi_i(JIT_R1, LIGHTREC_REG_STATE,
1065 offsetof(struct lightrec_state, current_cycle));
1066 jit_ldxi_i(JIT_R2, LIGHTREC_REG_STATE,
1067 offsetof(struct lightrec_state, target_cycle));
1068 jit_subr(LIGHTREC_REG_CYCLE, JIT_R2, JIT_R1);
1069 }
1070
1071 /* If we get non-NULL, loop */
1072 jit_patch_at(jit_bnei(JIT_R0, 0), loop);
1073
d16005f8
PC		 1074 /* When exiting, the recompiled code will jump to that address */
1075 jit_note(__FILE__, __LINE__);
1076 jit_patch(to_end);
1077
d16005f8
PC		 1078 jit_retr(LIGHTREC_REG_CYCLE);
1079 jit_epilog();
1080
d16005f8 1081 block->_jit = _jit;
d16005f8
PC		 1082 block->opcode_list = NULL;
1083 block->flags = 0;
1084 block->nb_ops = 0;
1085
d8b04acd 1086 block->function = lightrec_emit_code(state, block, _jit,
02487de7
PC		 1087 &block->code_size);
1088 if (!block->function)
1089 goto err_free_block;
d16005f8
PC		 1090
1091 state->eob_wrapper_func = jit_address(addr2);
98fa08a5
PC		 1092 if (OPT_REPLACE_MEMSET)
1093 state->memset_func = jit_address(addr3);
d16005f8
PC		 1094 state->get_next_block = jit_address(addr);
1095
1096 if (ENABLE_DISASSEMBLER) {
1097 pr_debug("Dispatcher block:\n");
1098 jit_disassemble();
1099 }
1100
1101 /* We're done! */
1102 jit_clear_state();
1103 return block;
1104
1105err_free_block:
1106 lightrec_free(state, MEM_FOR_IR, sizeof(*block), block);
1107err_no_mem:
1108 pr_err("Unable to compile dispatcher: Out of memory\n");
1109 return NULL;
1110}
1111
1112union code lightrec_read_opcode(struct lightrec_state *state, u32 pc)
1113{
fd58fa32 1114 void *host = NULL;
d16005f8 1115
98fa08a5 1116 lightrec_get_map(state, &host, kunseg(pc));
d16005f8 1117
98fa08a5 1118 const u32 *code = (u32 *)host;
02487de7 1119 return (union code) LE32TOH(*code);
98fa08a5 1120}
d16005f8 1121
98fa08a5
PC		 1122unsigned int lightrec_cycles_of_opcode(union code code)
1123{
1124 return 2;
1125}
d16005f8 1126
98fa08a5
PC		 1127void lightrec_free_opcode_list(struct lightrec_state *state, struct block *block)
1128{
1129 lightrec_free(state, MEM_FOR_IR,
1130 sizeof(*block->opcode_list) * block->nb_ops,
1131 block->opcode_list);
1132}
1133
1134static unsigned int lightrec_get_mips_block_len(const u32 *src)
1135{
1136 unsigned int i;
1137 union code c;
1138
1139 for (i = 1; ; i++) {
1140 c.opcode = LE32TOH(*src++);
1141
1142 if (is_syscall(c))
1143 return i;
1144
1145 if (is_unconditional_jump(c))
1146 return i + 1;
1147 }
1148}
1149
1150static struct opcode * lightrec_disassemble(struct lightrec_state *state,
1151 const u32 *src, unsigned int *len)
1152{
1153 struct opcode *list;
1154 unsigned int i, length;
1155
1156 length = lightrec_get_mips_block_len(src);
1157
1158 list = lightrec_malloc(state, MEM_FOR_IR, sizeof(*list) * length);
1159 if (!list) {
1160 pr_err("Unable to allocate memory\n");
1161 return NULL;
1162 }
1163
1164 for (i = 0; i < length; i++) {
1165 list[i].opcode = LE32TOH(src[i]);
1166 list[i].flags = 0;
1167 }
1168
1169 *len = length * sizeof(u32);
1170
1171 return list;
d16005f8
PC		 1172}
1173
1174static struct block * lightrec_precompile_block(struct lightrec_state *state,
1175 u32 pc)
1176{
1177 struct opcode *list;
1178 struct block *block;
98fa08a5
PC		 1179 void *host;
1180 const struct lightrec_mem_map *map = lightrec_get_map(state, &host, kunseg(pc));
1181 const u32 *code = (u32 *) host;
d16005f8 1182 unsigned int length;
98fa08a5 1183 bool fully_tagged;
d16005f8
PC		 1184
1185 if (!map)
1186 return NULL;
1187
d16005f8
PC		 1188 block = lightrec_malloc(state, MEM_FOR_IR, sizeof(*block));
1189 if (!block) {
1190 pr_err("Unable to recompile block: Out of memory\n");
1191 return NULL;
1192 }
1193
1194 list = lightrec_disassemble(state, code, &length);
1195 if (!list) {
1196 lightrec_free(state, MEM_FOR_IR, sizeof(*block), block);
1197 return NULL;
1198 }
1199
1200 block->pc = pc;
d16005f8
PC		 1201 block->_jit = NULL;
1202 block->function = NULL;
1203 block->opcode_list = list;
98fa08a5 1204 block->code = code;
d16005f8
PC		 1205 block->next = NULL;
1206 block->flags = 0;
1207 block->code_size = 0;
d8b04acd 1208 block->precompile_date = state->current_cycle;
d16005f8
PC		 1209#if ENABLE_THREADED_COMPILER
1210 block->op_list_freed = (atomic_flag)ATOMIC_FLAG_INIT;
1211#endif
1212 block->nb_ops = length / sizeof(u32);
1213
98fa08a5 1214 lightrec_optimize(state, block);
d16005f8
PC		 1215
1216 length = block->nb_ops * sizeof(u32);
1217
1218 lightrec_register(MEM_FOR_MIPS_CODE, length);
1219
1220 if (ENABLE_DISASSEMBLER) {
98fa08a5
PC		 1221 pr_debug("Disassembled block at PC: 0x%08x\n", block->pc);
1222 lightrec_print_disassembly(block, code);
d16005f8
PC		 1223 }
1224
98fa08a5 1225 pr_debug("Block size: %hu opcodes\n", block->nb_ops);
d16005f8
PC		 1226
1227 /* If the first opcode is an 'impossible' branch, never compile the
1228 * block */
98fa08a5 1229 if (should_emulate(block->opcode_list))
d16005f8
PC		 1230 block->flags |= BLOCK_NEVER_COMPILE;
1231
98fa08a5
PC		 1232 fully_tagged = lightrec_block_is_fully_tagged(block);
1233 if (fully_tagged)
1234 block->flags |= BLOCK_FULLY_TAGGED;
1235
1236 if (OPT_REPLACE_MEMSET && (block->flags & BLOCK_IS_MEMSET))
02487de7 1237 lut_write(state, lut_offset(pc), state->memset_func);
98fa08a5 1238
d16005f8
PC		 1239 block->hash = lightrec_calculate_block_hash(block);
1240
a59e5536 1241 pr_debug("Recompile count: %u\n", state->nb_precompile++);
1242
d16005f8
PC		 1243 return block;
1244}
1245
98fa08a5 1246static bool lightrec_block_is_fully_tagged(const struct block *block)
d16005f8 1247{
98fa08a5
PC		 1248 const struct opcode *op;
1249 unsigned int i;
1250
1251 for (i = 0; i < block->nb_ops; i++) {
1252 op = &block->opcode_list[i];
d16005f8 1253
d16005f8
PC		 1254 /* Verify that all load/stores of the opcode list
1255 * Check all loads/stores of the opcode list and mark the
1256 * block as fully compiled if they all have been tagged. */
1257 switch (op->c.i.op) {
1258 case OP_LB:
1259 case OP_LH:
1260 case OP_LWL:
1261 case OP_LW:
1262 case OP_LBU:
1263 case OP_LHU:
1264 case OP_LWR:
1265 case OP_SB:
1266 case OP_SH:
1267 case OP_SWL:
1268 case OP_SW:
1269 case OP_SWR:
1270 case OP_LWC2:
1271 case OP_SWC2:
22eee2ac 1272 if (!LIGHTREC_FLAGS_GET_IO_MODE(op->flags))
d16005f8 1273 return false;
d8b04acd
PC		 1274 fallthrough;
1275 default:
d16005f8
PC		 1276 continue;
1277 }
1278 }
1279
1280 return true;
1281}
1282
98fa08a5 1283static void lightrec_reap_block(struct lightrec_state *state, void *data)
a59e5536 1284{
1285 struct block *block = data;
1286
1287 pr_debug("Reap dead block at PC 0x%08x\n", block->pc);
98fa08a5
PC		 1288 lightrec_unregister_block(state->block_cache, block);
1289 lightrec_free_block(state, block);
a59e5536 1290}
1291
98fa08a5 1292static void lightrec_reap_jit(struct lightrec_state *state, void *data)
a59e5536 1293{
1294 _jit_destroy_state(data);
1295}
1296
02487de7
PC		 1297static void lightrec_free_function(struct lightrec_state *state, void *fn)
1298{
1299 if (ENABLE_CODE_BUFFER && state->tlsf) {
1300 pr_debug("Freeing code block at 0x%" PRIxPTR "\n", (uintptr_t) fn);
d8b04acd 1301 lightrec_free_code(state, fn);
02487de7
PC		 1302 }
1303}
1304
1305static void lightrec_reap_function(struct lightrec_state *state, void *data)
1306{
1307 lightrec_free_function(state, data);
1308}
1309
98fa08a5
PC		 1310int lightrec_compile_block(struct lightrec_cstate *cstate,
1311 struct block *block)
d16005f8 1312{
98fa08a5 1313 struct lightrec_state *state = cstate->state;
a59e5536 1314 struct lightrec_branch_target *target;
d16005f8 1315 bool op_list_freed = false, fully_tagged = false;
a59e5536 1316 struct block *block2;
d16005f8 1317 struct opcode *elm;
a59e5536 1318 jit_state_t *_jit, *oldjit;
d16005f8
PC		 1319 jit_node_t *start_of_block;
1320 bool skip_next = false;
d8b04acd 1321 void *old_fn, *new_fn;
d16005f8 1322 unsigned int i, j;
98fa08a5 1323 u32 offset;
d16005f8
PC		 1324
1325 fully_tagged = lightrec_block_is_fully_tagged(block);
1326 if (fully_tagged)
1327 block->flags |= BLOCK_FULLY_TAGGED;
1328
1329 _jit = jit_new_state();
1330 if (!_jit)
1331 return -ENOMEM;
1332
a59e5536 1333 oldjit = block->_jit;
02487de7 1334 old_fn = block->function;
d16005f8
PC		 1335 block->_jit = _jit;
1336
98fa08a5
PC		 1337 lightrec_regcache_reset(cstate->reg_cache);
1338 cstate->cycles = 0;
1339 cstate->nb_branches = 0;
1340 cstate->nb_local_branches = 0;
1341 cstate->nb_targets = 0;
d16005f8
PC		 1342
1343 jit_prolog();
1344 jit_tramp(256);
1345
1346 start_of_block = jit_label();
1347
98fa08a5
PC		 1348 for (i = 0; i < block->nb_ops; i++) {
1349 elm = &block->opcode_list[i];
d16005f8
PC		 1350
1351 if (skip_next) {
1352 skip_next = false;
1353 continue;
1354 }
1355
98fa08a5 1356 cstate->cycles += lightrec_cycles_of_opcode(elm->c);
d16005f8 1357
98fa08a5 1358 if (should_emulate(elm)) {
d16005f8 1359 pr_debug("Branch at offset 0x%x will be emulated\n",
98fa08a5
PC		 1360 i << 2);
1361
1362 lightrec_emit_eob(cstate, block, i, false);
d16005f8 1363 skip_next = !(elm->flags & LIGHTREC_NO_DS);
98fa08a5
PC		 1364 } else {
1365 lightrec_rec_opcode(cstate, block, i);
d16005f8
PC		 1366 skip_next = has_delay_slot(elm->c) &&
1367 !(elm->flags & LIGHTREC_NO_DS);
1368#if _WIN32
1369 /* FIXME: GNU Lightning on Windows seems to use our
1370 * mapped registers as temporaries. Until the actual bug
1371 * is found and fixed, unconditionally mark our
1372 * registers as live here. */
98fa08a5 1373 lightrec_regcache_mark_live(cstate->reg_cache, _jit);
d16005f8
PC		 1374#endif
1375 }
1376 }
1377
98fa08a5
PC		 1378 for (i = 0; i < cstate->nb_branches; i++)
1379 jit_patch(cstate->branches[i]);
d16005f8 1380
98fa08a5
PC		 1381 for (i = 0; i < cstate->nb_local_branches; i++) {
1382 struct lightrec_branch *branch = &cstate->local_branches[i];
d16005f8
PC		 1383
1384 pr_debug("Patch local branch to offset 0x%x\n",
1385 branch->target << 2);
1386
1387 if (branch->target == 0) {
1388 jit_patch_at(branch->branch, start_of_block);
1389 continue;
1390 }
1391
98fa08a5
PC		 1392 for (j = 0; j < cstate->nb_targets; j++) {
1393 if (cstate->targets[j].offset == branch->target) {
d16005f8 1394 jit_patch_at(branch->branch,
98fa08a5 1395 cstate->targets[j].label);
d16005f8
PC		 1396 break;
1397 }
1398 }
1399
98fa08a5 1400 if (j == cstate->nb_targets)
d16005f8
PC		 1401 pr_err("Unable to find branch target\n");
1402 }
1403
1404 jit_ldxi(JIT_R0, LIGHTREC_REG_STATE,
1405 offsetof(struct lightrec_state, eob_wrapper_func));
1406
1407 jit_jmpr(JIT_R0);
1408
1409 jit_ret();
1410 jit_epilog();
1411
d8b04acd
PC		 1412 new_fn = lightrec_emit_code(state, block, _jit, &block->code_size);
1413 if (!new_fn) {
1414 if (!ENABLE_THREADED_COMPILER)
1415 pr_err("Unable to compile block!\n");
1416 block->_jit = oldjit;
1417 _jit_destroy_state(_jit);
1418 return -ENOMEM;
02487de7
PC		 1419 }
1420
d8b04acd 1421 block->function = new_fn;
a59e5536 1422 block->flags &= ~BLOCK_SHOULD_RECOMPILE;
d16005f8
PC		 1423
1424 /* Add compiled function to the LUT */
02487de7 1425 lut_write(state, lut_offset(block->pc), block->function);
d16005f8 1426
98fa08a5
PC		 1427 if (ENABLE_THREADED_COMPILER) {
1428 /* Since we might try to reap the same block multiple times,
1429 * we need the reaper to wait until everything has been
1430 * submitted, so that the duplicate entries can be dropped. */
1431 lightrec_reaper_pause(state->reaper);
a59e5536 1432 }
1433
1434 /* Detect old blocks that have been covered by the new one */
98fa08a5
PC		 1435 for (i = 0; i < cstate->nb_targets; i++) {
1436 target = &cstate->targets[i];
a59e5536 1437
1438 if (!target->offset)
1439 continue;
1440
1441 offset = block->pc + target->offset * sizeof(u32);
1442 block2 = lightrec_find_block(state->block_cache, offset);
1443 if (block2) {
1444 /* No need to check if block2 is compilable - it must
1445 * be, otherwise block wouldn't be compilable either */
1446
98fa08a5
PC		 1447 /* Set the "block dead" flag to prevent the dynarec from
1448 * recompiling this block */
a59e5536 1449 block2->flags |= BLOCK_IS_DEAD;
1450
98fa08a5
PC		 1451 /* If block2 was pending for compilation, cancel it.
1452 * If it's being compiled right now, wait until it
1453 * finishes. */
1454 if (ENABLE_THREADED_COMPILER)
1455 lightrec_recompiler_remove(state->rec, block2);
fd58fa32 1456 }
98fa08a5 1457
fd58fa32
PC		 1458 /* We know from now on that block2 (if present) isn't going to
1459 * be compiled. We can override the LUT entry with our new
1460 * block's entry point. */
1461 offset = lut_offset(block->pc) + target->offset;
02487de7 1462 lut_write(state, offset, jit_address(target->label));
98fa08a5 1463
fd58fa32 1464 if (block2) {
a59e5536 1465 pr_debug("Reap block 0x%08x as it's covered by block "
1466 "0x%08x\n", block2->pc, block->pc);
1467
98fa08a5 1468 /* Finally, reap the block. */
a59e5536 1469 if (ENABLE_THREADED_COMPILER) {
a59e5536 1470 lightrec_reaper_add(state->reaper,
1471 lightrec_reap_block,
1472 block2);
1473 } else {
98fa08a5
PC		 1474 lightrec_unregister_block(state->block_cache, block2);
1475 lightrec_free_block(state, block2);
a59e5536 1476 }
1477 }
1478 }
1479
b19ddc79 1480 if (ENABLE_THREADED_COMPILER)
98fa08a5
PC		 1481 lightrec_reaper_continue(state->reaper);
1482
d16005f8 1483 if (ENABLE_DISASSEMBLER) {
98fa08a5 1484 pr_debug("Compiling block at PC: 0x%08x\n", block->pc);
d16005f8
PC		 1485 jit_disassemble();
1486 }
1487
1488 jit_clear_state();
1489
1490#if ENABLE_THREADED_COMPILER
1491 if (fully_tagged)
1492 op_list_freed = atomic_flag_test_and_set(&block->op_list_freed);
1493#endif
1494 if (fully_tagged && !op_list_freed) {
1495 pr_debug("Block PC 0x%08x is fully tagged"
1496 " - free opcode list\n", block->pc);
98fa08a5 1497 lightrec_free_opcode_list(state, block);
d16005f8
PC		 1498 block->opcode_list = NULL;
1499 }
1500
a59e5536 1501 if (oldjit) {
1502 pr_debug("Block 0x%08x recompiled, reaping old jit context.\n",
1503 block->pc);
1504
02487de7 1505 if (ENABLE_THREADED_COMPILER) {
a59e5536 1506 lightrec_reaper_add(state->reaper,
1507 lightrec_reap_jit, oldjit);
02487de7
PC		 1508 lightrec_reaper_add(state->reaper,
1509 lightrec_reap_function, old_fn);
1510 } else {
a59e5536 1511 _jit_destroy_state(oldjit);
02487de7
PC		 1512 lightrec_free_function(state, old_fn);
1513 }
a59e5536 1514 }
1515
d16005f8
PC		 1516 return 0;
1517}
1518
98fa08a5
PC		 1519static void lightrec_print_info(struct lightrec_state *state)
1520{
1521 if ((state->current_cycle & ~0xfffffff) != state->old_cycle_counter) {
1522 pr_info("Lightrec RAM usage: IR %u KiB, CODE %u KiB, "
1523 "MIPS %u KiB, TOTAL %u KiB, avg. IPI %f\n",
1524 lightrec_get_mem_usage(MEM_FOR_IR) / 1024,
1525 lightrec_get_mem_usage(MEM_FOR_CODE) / 1024,
1526 lightrec_get_mem_usage(MEM_FOR_MIPS_CODE) / 1024,
1527 lightrec_get_total_mem_usage() / 1024,
1528 lightrec_get_average_ipi());
1529 state->old_cycle_counter = state->current_cycle & ~0xfffffff;
1530 }
1531}
1532
d16005f8
PC		 1533u32 lightrec_execute(struct lightrec_state *state, u32 pc, u32 target_cycle)
1534{
1535 s32 (*func)(void *, s32) = (void *)state->dispatcher->function;
1536 void *block_trace;
1537 s32 cycles_delta;
1538
1539 state->exit_flags = LIGHTREC_EXIT_NORMAL;
1540
1541 /* Handle the cycle counter overflowing */
1542 if (unlikely(target_cycle < state->current_cycle))
1543 target_cycle = UINT_MAX;
1544
1545 state->target_cycle = target_cycle;
98fa08a5 1546 state->next_pc = pc;
d16005f8
PC		 1547
1548 block_trace = get_next_block_func(state, pc);
1549 if (block_trace) {
1550 cycles_delta = state->target_cycle - state->current_cycle;
1551
1552 cycles_delta = (*func)(block_trace, cycles_delta);
1553
1554 state->current_cycle = state->target_cycle - cycles_delta;
1555 }
1556
a59e5536 1557 if (ENABLE_THREADED_COMPILER)
1558 lightrec_reaper_reap(state->reaper);
1559
98fa08a5
PC		 1560 if (LOG_LEVEL >= INFO_L)
1561 lightrec_print_info(state);
1562
d16005f8
PC		 1563 return state->next_pc;
1564}
1565
1566u32 lightrec_execute_one(struct lightrec_state *state, u32 pc)
1567{
1568 return lightrec_execute(state, pc, state->current_cycle);
1569}
1570
1571u32 lightrec_run_interpreter(struct lightrec_state *state, u32 pc)
1572{
1573 struct block *block = lightrec_get_block(state, pc);
1574 if (!block)
1575 return 0;
1576
1577 state->exit_flags = LIGHTREC_EXIT_NORMAL;
1578
98fa08a5
PC		 1579 pc = lightrec_emulate_block(state, block, pc);
1580
1581 if (LOG_LEVEL >= INFO_L)
1582 lightrec_print_info(state);
1583
1584 return pc;
d16005f8
PC		 1585}
1586
98fa08a5 1587void lightrec_free_block(struct lightrec_state *state, struct block *block)
d16005f8
PC		 1588{
1589 lightrec_unregister(MEM_FOR_MIPS_CODE, block->nb_ops * sizeof(u32));
1590 if (block->opcode_list)
98fa08a5 1591 lightrec_free_opcode_list(state, block);
d16005f8
PC		 1592 if (block->_jit)
1593 _jit_destroy_state(block->_jit);
d8b04acd
PC		 1594 if (block->function) {
1595 lightrec_free_function(state, block->function);
1596 lightrec_unregister(MEM_FOR_CODE, block->code_size);
1597 }
98fa08a5
PC		 1598 lightrec_free(state, MEM_FOR_IR, sizeof(*block), block);
1599}
1600
1601struct lightrec_cstate * lightrec_create_cstate(struct lightrec_state *state)
1602{
1603 struct lightrec_cstate *cstate;
1604
1605 cstate = lightrec_malloc(state, MEM_FOR_LIGHTREC, sizeof(*cstate));
1606 if (!cstate)
1607 return NULL;
1608
1609 cstate->reg_cache = lightrec_regcache_init(state);
1610 if (!cstate->reg_cache) {
1611 lightrec_free(state, MEM_FOR_LIGHTREC, sizeof(*cstate), cstate);
1612 return NULL;
1613 }
1614
1615 cstate->state = state;
1616
1617 return cstate;
1618}
1619
1620void lightrec_free_cstate(struct lightrec_cstate *cstate)
1621{
1622 lightrec_free_regcache(cstate->reg_cache);
1623 lightrec_free(cstate->state, MEM_FOR_LIGHTREC, sizeof(*cstate), cstate);
d16005f8
PC		 1624}
1625
1626struct lightrec_state * lightrec_init(char *argv0,
1627 const struct lightrec_mem_map *map,
1628 size_t nb,
1629 const struct lightrec_ops *ops)
1630{
d8b04acd 1631 const struct lightrec_mem_map *codebuf_map = &map[PSX_MAP_CODE_BUFFER];
d16005f8 1632 struct lightrec_state *state;
02487de7
PC		 1633 uintptr_t addr;
1634 void *tlsf = NULL;
1635 bool with_32bit_lut = false;
1636 size_t lut_size;
d16005f8
PC		 1637
1638 /* Sanity-check ops */
98fa08a5 1639 if (!ops || !ops->cop2_op || !ops->enable_ram) {
d16005f8
PC		 1640 pr_err("Missing callbacks in lightrec_ops structure\n");
1641 return NULL;
1642 }
1643
d8b04acd
PC		 1644 if (ENABLE_CODE_BUFFER && nb > PSX_MAP_CODE_BUFFER
1645 && codebuf_map->address) {
02487de7
PC		 1646 tlsf = tlsf_create_with_pool(codebuf_map->address,
1647 codebuf_map->length);
1648 if (!tlsf) {
1649 pr_err("Unable to initialize code buffer\n");
1650 return NULL;
1651 }
1652
1653 if (__WORDSIZE == 64) {
1654 addr = (uintptr_t) codebuf_map->address + codebuf_map->length - 1;
1655 with_32bit_lut = addr == (u32) addr;
1656 }
1657 }
1658
1659 if (with_32bit_lut)
1660 lut_size = CODE_LUT_SIZE * 4;
1661 else
1662 lut_size = CODE_LUT_SIZE * sizeof(void *);
1663
d16005f8
PC		 1664 init_jit(argv0);
1665
02487de7 1666 state = calloc(1, sizeof(*state) + lut_size);
d16005f8
PC		 1667 if (!state)
1668 goto err_finish_jit;
1669
02487de7
PC		 1670 lightrec_register(MEM_FOR_LIGHTREC, sizeof(*state) + lut_size);
1671
1672 state->tlsf = tlsf;
1673 state->with_32bit_lut = with_32bit_lut;
d16005f8 1674
d16005f8
PC		 1675 state->block_cache = lightrec_blockcache_init(state);
1676 if (!state->block_cache)
d8b04acd 1677 goto err_free_state;
d16005f8 1678
d16005f8
PC		 1679 if (ENABLE_THREADED_COMPILER) {
1680 state->rec = lightrec_recompiler_init(state);
1681 if (!state->rec)
98fa08a5 1682 goto err_free_block_cache;
a59e5536 1683
1684 state->reaper = lightrec_reaper_init(state);
1685 if (!state->reaper)
1686 goto err_free_recompiler;
98fa08a5
PC		 1687 } else {
1688 state->cstate = lightrec_create_cstate(state);
1689 if (!state->cstate)
1690 goto err_free_block_cache;
d16005f8
PC		 1691 }
1692
1693 state->nb_maps = nb;
1694 state->maps = map;
1695
1696 memcpy(&state->ops, ops, sizeof(*ops));
1697
1698 state->dispatcher = generate_dispatcher(state);
1699 if (!state->dispatcher)
a59e5536 1700 goto err_free_reaper;
d16005f8 1701
98fa08a5
PC		 1702 state->c_wrapper_block = generate_wrapper(state);
1703 if (!state->c_wrapper_block)
d16005f8
PC		 1704 goto err_free_dispatcher;
1705
98fa08a5
PC		 1706 state->c_wrappers[C_WRAPPER_RW] = lightrec_rw_cb;
1707 state->c_wrappers[C_WRAPPER_RW_GENERIC] = lightrec_rw_generic_cb;
98fa08a5 1708 state->c_wrappers[C_WRAPPER_MTC] = lightrec_mtc_cb;
22eee2ac 1709 state->c_wrappers[C_WRAPPER_CP] = lightrec_cp_cb;
98fa08a5
PC		 1710 state->c_wrappers[C_WRAPPER_SYSCALL] = lightrec_syscall_cb;
1711 state->c_wrappers[C_WRAPPER_BREAK] = lightrec_break_cb;
d16005f8
PC		 1712
1713 map = &state->maps[PSX_MAP_BIOS];
1714 state->offset_bios = (uintptr_t)map->address - map->pc;
1715
1716 map = &state->maps[PSX_MAP_SCRATCH_PAD];
1717 state->offset_scratch = (uintptr_t)map->address - map->pc;
1718
1719 map = &state->maps[PSX_MAP_KERNEL_USER_RAM];
1720 state->offset_ram = (uintptr_t)map->address - map->pc;
1721
1722 if (state->maps[PSX_MAP_MIRROR1].address == map->address + 0x200000 &&
1723 state->maps[PSX_MAP_MIRROR2].address == map->address + 0x400000 &&
1724 state->maps[PSX_MAP_MIRROR3].address == map->address + 0x600000)
1725 state->mirrors_mapped = true;
1726
98fa08a5
PC		 1727 if (state->offset_bios == 0 &&
1728 state->offset_scratch == 0 &&
1729 state->offset_ram == 0 &&
1730 state->mirrors_mapped) {
1731 pr_info("Memory map is perfect. Emitted code will be best.\n");
1732 } else {
1733 pr_info("Memory map is sub-par. Emitted code will be slow.\n");
1734 }
1735
02487de7
PC		 1736 if (state->with_32bit_lut)
1737 pr_info("Using 32-bit LUT\n");
1738
d16005f8
PC		 1739 return state;
1740
d16005f8 1741err_free_dispatcher:
98fa08a5 1742 lightrec_free_block(state, state->dispatcher);
a59e5536 1743err_free_reaper:
1744 if (ENABLE_THREADED_COMPILER)
1745 lightrec_reaper_destroy(state->reaper);
d16005f8
PC		 1746err_free_recompiler:
1747 if (ENABLE_THREADED_COMPILER)
1748 lightrec_free_recompiler(state->rec);
98fa08a5
PC		 1749 else
1750 lightrec_free_cstate(state->cstate);
d16005f8
PC		 1751err_free_block_cache:
1752 lightrec_free_block_cache(state->block_cache);
d16005f8 1753err_free_state:
d16005f8 1754 lightrec_unregister(MEM_FOR_LIGHTREC, sizeof(*state) +
02487de7 1755 lut_elm_size(state) * CODE_LUT_SIZE);
d16005f8
PC		 1756 free(state);
1757err_finish_jit:
1758 finish_jit();
02487de7
PC		 1759 if (ENABLE_CODE_BUFFER && tlsf)
1760 tlsf_destroy(tlsf);
d16005f8
PC		 1761 return NULL;
1762}
1763
1764void lightrec_destroy(struct lightrec_state *state)
1765{
98fa08a5
PC		 1766 /* Force a print info on destroy*/
1767 state->current_cycle = ~state->current_cycle;
1768 lightrec_print_info(state);
1769
a59e5536 1770 if (ENABLE_THREADED_COMPILER) {
d16005f8 1771 lightrec_free_recompiler(state->rec);
a59e5536 1772 lightrec_reaper_destroy(state->reaper);
98fa08a5
PC		 1773 } else {
1774 lightrec_free_cstate(state->cstate);
a59e5536 1775 }
d16005f8 1776
d16005f8 1777 lightrec_free_block_cache(state->block_cache);
98fa08a5
PC		 1778 lightrec_free_block(state, state->dispatcher);
1779 lightrec_free_block(state, state->c_wrapper_block);
d16005f8 1780 finish_jit();
02487de7
PC		 1781 if (ENABLE_CODE_BUFFER && state->tlsf)
1782 tlsf_destroy(state->tlsf);
d16005f8 1783
d16005f8 1784 lightrec_unregister(MEM_FOR_LIGHTREC, sizeof(*state) +
02487de7 1785 lut_elm_size(state) * CODE_LUT_SIZE);
d16005f8
PC		 1786 free(state);
1787}
1788
1789void lightrec_invalidate(struct lightrec_state *state, u32 addr, u32 len)
1790{
1791 u32 kaddr = kunseg(addr & ~0x3);
d8b04acd 1792 enum psx_map idx = lightrec_get_map_idx(state, kaddr);
d16005f8 1793
d8b04acd
PC		 1794 switch (idx) {
1795 case PSX_MAP_MIRROR1:
1796 case PSX_MAP_MIRROR2:
1797 case PSX_MAP_MIRROR3:
d16005f8 1798 /* Handle mirrors */
d8b04acd
PC		 1799 kaddr &= RAM_SIZE - 1;
1800 fallthrough;
1801 case PSX_MAP_KERNEL_USER_RAM:
1802 break;
1803 default:
1804 return;
d16005f8 1805 }
d8b04acd
PC		 1806
1807 memset(lut_address(state, lut_offset(kaddr)), 0,
1808 ((len + 3) / 4) * lut_elm_size(state));
d16005f8
PC		 1809}
1810
1811void lightrec_invalidate_all(struct lightrec_state *state)
1812{
02487de7 1813 memset(state->code_lut, 0, lut_elm_size(state) * CODE_LUT_SIZE);
d16005f8
PC		 1814}
1815
1816void lightrec_set_invalidate_mode(struct lightrec_state *state, bool dma_only)
1817{
1818 if (state->invalidate_from_dma_only != dma_only)
1819 lightrec_invalidate_all(state);
1820
1821 state->invalidate_from_dma_only = dma_only;
1822}
1823
1824void lightrec_set_exit_flags(struct lightrec_state *state, u32 flags)
1825{
1826 if (flags != LIGHTREC_EXIT_NORMAL) {
1827 state->exit_flags |= flags;
1828 state->target_cycle = state->current_cycle;
1829 }
1830}
1831
1832u32 lightrec_exit_flags(struct lightrec_state *state)
1833{
1834 return state->exit_flags;
1835}
1836
d16005f8
PC		 1837u32 lightrec_current_cycle_count(const struct lightrec_state *state)
1838{
1839 return state->current_cycle;
1840}
1841
1842void lightrec_reset_cycle_count(struct lightrec_state *state, u32 cycles)
1843{
1844 state->current_cycle = cycles;
1845
1846 if (state->target_cycle < cycles)
1847 state->target_cycle = cycles;
1848}
1849
1850void lightrec_set_target_cycle_count(struct lightrec_state *state, u32 cycles)
1851{
1852 if (state->exit_flags == LIGHTREC_EXIT_NORMAL) {
1853 if (cycles < state->current_cycle)
1854 cycles = state->current_cycle;
1855
1856 state->target_cycle = cycles;
1857 }
1858}
98fa08a5
PC		 1859
1860struct lightrec_registers * lightrec_get_registers(struct lightrec_state *state)
1861{
1862 return &state->regs;
1863}
ARM optimized PCSX fork