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[pcsx_rearmed.git] / deps / lightrec / lightrec.c
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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"
19
20#include <errno.h>
98fa08a5 21#include <inttypes.h>
d16005f8
PC		 22#include <limits.h>
23#if ENABLE_THREADED_COMPILER
24#include <stdatomic.h>
25#endif
26#include <stdbool.h>
27#include <stddef.h>
28#include <string.h>
29#if ENABLE_TINYMM
30#include <tinymm.h>
31#endif
32
33#define GENMASK(h, l) \
34 (((uintptr_t)-1 << (l)) & ((uintptr_t)-1 >> (__WORDSIZE - 1 - (h))))
35
36static struct block * lightrec_precompile_block(struct lightrec_state *state,
37 u32 pc);
98fa08a5
PC		 38static bool lightrec_block_is_fully_tagged(const struct block *block);
39
40static void lightrec_mtc2(struct lightrec_state *state, u8 reg, u32 data);
41static u32 lightrec_mfc2(struct lightrec_state *state, u8 reg);
d16005f8 42
a59e5536 43static void lightrec_default_sb(struct lightrec_state *state, u32 opcode,
44 void *host, u32 addr, u8 data)
45{
46 *(u8 *)host = data;
47
48 if (!state->invalidate_from_dma_only)
49 lightrec_invalidate(state, addr, 1);
50}
51
52static void lightrec_default_sh(struct lightrec_state *state, u32 opcode,
53 void *host, u32 addr, u16 data)
54{
55 *(u16 *)host = HTOLE16(data);
56
57 if (!state->invalidate_from_dma_only)
58 lightrec_invalidate(state, addr, 2);
59}
60
61static void lightrec_default_sw(struct lightrec_state *state, u32 opcode,
62 void *host, u32 addr, u32 data)
63{
64 *(u32 *)host = HTOLE32(data);
65
66 if (!state->invalidate_from_dma_only)
67 lightrec_invalidate(state, addr, 4);
68}
69
70static u8 lightrec_default_lb(struct lightrec_state *state,
71 u32 opcode, void *host, u32 addr)
72{
73 return *(u8 *)host;
74}
75
76static u16 lightrec_default_lh(struct lightrec_state *state,
77 u32 opcode, void *host, u32 addr)
78{
79 return LE16TOH(*(u16 *)host);
80}
81
82static u32 lightrec_default_lw(struct lightrec_state *state,
83 u32 opcode, void *host, u32 addr)
84{
85 return LE32TOH(*(u32 *)host);
86}
87
88static const struct lightrec_mem_map_ops lightrec_default_ops = {
89 .sb = lightrec_default_sb,
90 .sh = lightrec_default_sh,
91 .sw = lightrec_default_sw,
92 .lb = lightrec_default_lb,
93 .lh = lightrec_default_lh,
94 .lw = lightrec_default_lw,
95};
96
98fa08a5
PC		 97static void __segfault_cb(struct lightrec_state *state, u32 addr,
98 const struct block *block)
d16005f8
PC		 99{
100 lightrec_set_exit_flags(state, LIGHTREC_EXIT_SEGFAULT);
101 pr_err("Segmentation fault in recompiled code: invalid "
102 "load/store at address 0x%08x\n", addr);
98fa08a5
PC		 103 if (block)
104 pr_err("Was executing block PC 0x%08x\n", block->pc);
d16005f8
PC		 105}
106
a59e5536 107static void lightrec_swl(struct lightrec_state *state,
108 const struct lightrec_mem_map_ops *ops,
109 u32 opcode, void *host, u32 addr, u32 data)
d16005f8 110{
a59e5536 111 unsigned int shift = addr & 0x3;
112 unsigned int mask = GENMASK(31, (shift + 1) * 8);
113 u32 old_data;
114
115 /* Align to 32 bits */
116 addr &= ~3;
117 host = (void *)((uintptr_t)host & ~3);
118
119 old_data = ops->lw(state, opcode, host, addr);
120
121 data = (data >> ((3 - shift) * 8)) | (old_data & mask);
122
123 ops->sw(state, opcode, host, addr, data);
124}
125
126static void lightrec_swr(struct lightrec_state *state,
127 const struct lightrec_mem_map_ops *ops,
128 u32 opcode, void *host, u32 addr, u32 data)
129{
130 unsigned int shift = addr & 0x3;
131 unsigned int mask = (1 << (shift * 8)) - 1;
132 u32 old_data;
133
134 /* Align to 32 bits */
135 addr &= ~3;
136 host = (void *)((uintptr_t)host & ~3);
137
138 old_data = ops->lw(state, opcode, host, addr);
139
140 data = (data << (shift * 8)) | (old_data & mask);
141
142 ops->sw(state, opcode, host, addr, data);
143}
144
145static void lightrec_swc2(struct lightrec_state *state, union code op,
146 const struct lightrec_mem_map_ops *ops,
147 void *host, u32 addr)
148{
98fa08a5 149 u32 data = lightrec_mfc2(state, op.i.rt);
a59e5536 150
151 ops->sw(state, op.opcode, host, addr, data);
152}
153
154static u32 lightrec_lwl(struct lightrec_state *state,
155 const struct lightrec_mem_map_ops *ops,
156 u32 opcode, void *host, u32 addr, u32 data)
157{
158 unsigned int shift = addr & 0x3;
159 unsigned int mask = (1 << (24 - shift * 8)) - 1;
160 u32 old_data;
161
162 /* Align to 32 bits */
163 addr &= ~3;
164 host = (void *)((uintptr_t)host & ~3);
165
166 old_data = ops->lw(state, opcode, host, addr);
167
168 return (data & mask) | (old_data << (24 - shift * 8));
169}
170
171static u32 lightrec_lwr(struct lightrec_state *state,
172 const struct lightrec_mem_map_ops *ops,
173 u32 opcode, void *host, u32 addr, u32 data)
174{
175 unsigned int shift = addr & 0x3;
176 unsigned int mask = GENMASK(31, 32 - shift * 8);
177 u32 old_data;
178
179 /* Align to 32 bits */
180 addr &= ~3;
181 host = (void *)((uintptr_t)host & ~3);
182
183 old_data = ops->lw(state, opcode, host, addr);
184
185 return (data & mask) | (old_data >> (shift * 8));
186}
187
188static void lightrec_lwc2(struct lightrec_state *state, union code op,
189 const struct lightrec_mem_map_ops *ops,
190 void *host, u32 addr)
191{
192 u32 data = ops->lw(state, op.opcode, host, addr);
193
98fa08a5 194 lightrec_mtc2(state, op.i.rt, data);
d16005f8
PC		 195}
196
197static void lightrec_invalidate_map(struct lightrec_state *state,
98fa08a5 198 const struct lightrec_mem_map *map, u32 addr, u32 len)
d16005f8 199{
98fa08a5
PC		 200 if (map == &state->maps[PSX_MAP_KERNEL_USER_RAM]) {
201 memset(&state->code_lut[lut_offset(addr)], 0,
202 ((len + 3) / 4) * sizeof(void *));
203 }
d16005f8
PC		 204}
205
98fa08a5
PC		 206const struct lightrec_mem_map *
207lightrec_get_map(struct lightrec_state *state, void **host, u32 kaddr)
d16005f8 208{
98fa08a5 209 const struct lightrec_mem_map *map;
d16005f8 210 unsigned int i;
98fa08a5 211 u32 addr;
d16005f8
PC		 212
213 for (i = 0; i < state->nb_maps; i++) {
98fa08a5 214 const struct lightrec_mem_map *mapi = &state->maps[i];
d16005f8 215
98fa08a5
PC		 216 if (kaddr >= mapi->pc && kaddr < mapi->pc + mapi->length) {
217 map = mapi;
218 break;
219 }
d16005f8
PC		 220 }
221
98fa08a5
PC		 222 if (i == state->nb_maps)
223 return NULL;
224
225 addr = kaddr - map->pc;
226
227 while (map->mirror_of)
228 map = map->mirror_of;
229
230 if (host)
231 *host = map->address + addr;
232
233 return map;
d16005f8
PC		 234}
235
236u32 lightrec_rw(struct lightrec_state *state, union code op,
98fa08a5 237 u32 addr, u32 data, u16 *flags, struct block *block)
d16005f8
PC		 238{
239 const struct lightrec_mem_map *map;
a59e5536 240 const struct lightrec_mem_map_ops *ops;
98fa08a5 241 u32 opcode = op.opcode;
a59e5536 242 void *host;
d16005f8
PC		 243
244 addr += (s16) op.i.imm;
d16005f8 245
98fa08a5 246 map = lightrec_get_map(state, &host, kunseg(addr));
d16005f8 247 if (!map) {
98fa08a5 248 __segfault_cb(state, addr, block);
d16005f8
PC		 249 return 0;
250 }
251
d16005f8
PC		 252 if (unlikely(map->ops)) {
253 if (flags)
254 *flags |= LIGHTREC_HW_IO;
255
a59e5536 256 ops = map->ops;
257 } else {
258 if (flags)
259 *flags |= LIGHTREC_DIRECT_IO;
d16005f8 260
a59e5536 261 ops = &lightrec_default_ops;
262 }
d16005f8
PC		 263
264 switch (op.i.op) {
265 case OP_SB:
a59e5536 266 ops->sb(state, opcode, host, addr, (u8) data);
d16005f8
PC		 267 return 0;
268 case OP_SH:
a59e5536 269 ops->sh(state, opcode, host, addr, (u16) data);
d16005f8
PC		 270 return 0;
271 case OP_SWL:
a59e5536 272 lightrec_swl(state, ops, opcode, host, addr, data);
d16005f8
PC		 273 return 0;
274 case OP_SWR:
a59e5536 275 lightrec_swr(state, ops, opcode, host, addr, data);
d16005f8
PC		 276 return 0;
277 case OP_SW:
a59e5536 278 ops->sw(state, opcode, host, addr, data);
d16005f8
PC		 279 return 0;
280 case OP_SWC2:
a59e5536 281 lightrec_swc2(state, op, ops, host, addr);
d16005f8
PC		 282 return 0;
283 case OP_LB:
a59e5536 284 return (s32) (s8) ops->lb(state, opcode, host, addr);
d16005f8 285 case OP_LBU:
a59e5536 286 return ops->lb(state, opcode, host, addr);
d16005f8 287 case OP_LH:
a59e5536 288 return (s32) (s16) ops->lh(state, opcode, host, addr);
d16005f8 289 case OP_LHU:
a59e5536 290 return ops->lh(state, opcode, host, addr);
d16005f8 291 case OP_LWC2:
a59e5536 292 lightrec_lwc2(state, op, ops, host, addr);
d16005f8 293 return 0;
a59e5536 294 case OP_LWL:
295 return lightrec_lwl(state, ops, opcode, host, addr, data);
296 case OP_LWR:
297 return lightrec_lwr(state, ops, opcode, host, addr, data);
d16005f8
PC		 298 case OP_LW:
299 default:
a59e5536 300 return ops->lw(state, opcode, host, addr);
d16005f8
PC		 301 }
302}
303
304static void lightrec_rw_helper(struct lightrec_state *state,
98fa08a5
PC		 305 union code op, u16 *flags,
306 struct block *block)
d16005f8 307{
98fa08a5
PC		 308 u32 ret = lightrec_rw(state, op, state->regs.gpr[op.i.rs],
309 state->regs.gpr[op.i.rt], flags, block);
d16005f8
PC		 310
311 switch (op.i.op) {
312 case OP_LB:
313 case OP_LBU:
314 case OP_LH:
315 case OP_LHU:
316 case OP_LWL:
317 case OP_LWR:
318 case OP_LW:
319 if (op.i.rt)
98fa08a5 320 state->regs.gpr[op.i.rt] = ret;
d16005f8
PC		 321 default: /* fall-through */
322 break;
323 }
324}
325
326static void lightrec_rw_cb(struct lightrec_state *state, union code op)
327{
98fa08a5 328 lightrec_rw_helper(state, op, NULL, NULL);
d16005f8
PC		 329}
330
98fa08a5 331static void lightrec_rw_generic_cb(struct lightrec_state *state, u32 arg)
d16005f8 332{
98fa08a5
PC		 333 struct block *block;
334 struct opcode *op;
335 bool was_tagged;
336 u16 offset = (u16)arg;
337
338 block = lightrec_find_block_from_lut(state->block_cache,
339 arg >> 16, state->next_pc);
340 if (unlikely(!block)) {
341 pr_err("rw_generic: No block found in LUT for PC 0x%x offset 0x%x\n",
342 state->next_pc, offset);
343 return;
344 }
345
346 op = &block->opcode_list[offset];
347 was_tagged = op->flags & (LIGHTREC_HW_IO | LIGHTREC_DIRECT_IO);
d16005f8 348
98fa08a5 349 lightrec_rw_helper(state, op->c, &op->flags, block);
d16005f8
PC		 350
351 if (!was_tagged) {
98fa08a5
PC		 352 pr_debug("Opcode of block at PC 0x%08x has been tagged - flag "
353 "for recompilation\n", block->pc);
d16005f8 354
a59e5536 355 block->flags |= BLOCK_SHOULD_RECOMPILE;
d16005f8
PC		 356 }
357}
358
98fa08a5 359static u32 clamp_s32(s32 val, s32 min, s32 max)
d16005f8 360{
98fa08a5
PC		 361 return val < min ? min : val > max ? max : val;
362}
d16005f8 363
98fa08a5
PC		 364static u32 lightrec_mfc2(struct lightrec_state *state, u8 reg)
365{
366 s16 gteir1, gteir2, gteir3;
367
368 switch (reg) {
369 case 1:
370 case 3:
371 case 5:
372 case 8:
373 case 9:
374 case 10:
375 case 11:
376 return (s32)(s16) state->regs.cp2d[reg];
377 case 7:
378 case 16:
379 case 17:
380 case 18:
381 case 19:
382 return (u16) state->regs.cp2d[reg];
383 case 28:
384 case 29:
385 gteir1 = (s16) state->regs.cp2d[9];
386 gteir2 = (s16) state->regs.cp2d[10];
387 gteir3 = (s16) state->regs.cp2d[11];
388
389 return clamp_s32(gteir1 >> 7, 0, 0x1f) << 0 |
390 clamp_s32(gteir2 >> 7, 0, 0x1f) << 5 |
391 clamp_s32(gteir3 >> 7, 0, 0x1f) << 10;
392 case 15:
393 reg = 14;
394 default: /* fall-through */
395 return state->regs.cp2d[reg];
396 }
397}
d16005f8 398
98fa08a5
PC		 399u32 lightrec_mfc(struct lightrec_state *state, union code op)
400{
401 if (op.i.op == OP_CP0)
402 return state->regs.cp0[op.r.rd];
403 else if (op.r.rs == OP_CP2_BASIC_MFC2)
404 return lightrec_mfc2(state, op.r.rd);
d16005f8 405 else
98fa08a5 406 return state->regs.cp2c[op.r.rd];
d16005f8
PC		 407}
408
409static void lightrec_mfc_cb(struct lightrec_state *state, union code op)
410{
411 u32 rt = lightrec_mfc(state, op);
412
413 if (op.r.rt)
98fa08a5 414 state->regs.gpr[op.r.rt] = rt;
d16005f8
PC		 415}
416
98fa08a5 417static void lightrec_mtc0(struct lightrec_state *state, u8 reg, u32 data)
d16005f8 418{
98fa08a5
PC		 419 u32 status, cause;
420
421 switch (reg) {
422 case 1:
423 case 4:
424 case 8:
425 case 14:
426 case 15:
427 /* Those registers are read-only */
428 return;
429 default: /* fall-through */
430 break;
431 }
d16005f8 432
98fa08a5
PC		 433 if (reg == 12) {
434 status = state->regs.cp0[12];
d16005f8 435
98fa08a5
PC		 436 if (status & ~data & BIT(16)) {
437 state->ops.enable_ram(state, true);
438 lightrec_invalidate_all(state);
439 } else if (~status & data & BIT(16)) {
440 state->ops.enable_ram(state, false);
441 }
442 }
443
444 state->regs.cp0[reg] = data;
445
446 if (reg == 12 || reg == 13) {
447 cause = state->regs.cp0[13];
448 status = state->regs.cp0[12];
449
450 if (!!(status & cause & 0x300) & status)
451 lightrec_set_exit_flags(state, LIGHTREC_EXIT_CHECK_INTERRUPT);
452 }
453}
454
455static u32 count_leading_bits(s32 data)
456{
98fa08a5
PC		 457 u32 cnt = 33;
458
de742fa0
PC		 459#ifdef __has_builtin
460#if __has_builtin(__builtin_clrsb)
461 return 1 + __builtin_clrsb(data);
462#endif
463#endif
464
98fa08a5
PC		 465 data = (data ^ (data >> 31)) << 1;
466
467 do {
468 cnt -= 1;
469 data >>= 1;
470 } while (data);
471
472 return cnt;
98fa08a5
PC		 473}
474
475static void lightrec_mtc2(struct lightrec_state *state, u8 reg, u32 data)
476{
477 switch (reg) {
478 case 15:
479 state->regs.cp2d[12] = state->regs.cp2d[13];
480 state->regs.cp2d[13] = state->regs.cp2d[14];
481 state->regs.cp2d[14] = data;
482 break;
483 case 28:
484 state->regs.cp2d[9] = (data << 7) & 0xf80;
485 state->regs.cp2d[10] = (data << 2) & 0xf80;
486 state->regs.cp2d[11] = (data >> 3) & 0xf80;
487 break;
488 case 31:
489 return;
490 case 30:
491 state->regs.cp2d[31] = count_leading_bits((s32) data);
492 default: /* fall-through */
493 state->regs.cp2d[reg] = data;
494 break;
495 }
496}
d16005f8 497
98fa08a5
PC		 498static void lightrec_ctc2(struct lightrec_state *state, u8 reg, u32 data)
499{
500 switch (reg) {
501 case 4:
502 case 12:
503 case 20:
504 case 26:
505 case 27:
506 case 29:
507 case 30:
508 data = (s32)(s16) data;
509 break;
510 case 31:
511 data = (data & 0x7ffff000) | !!(data & 0x7f87e000) << 31;
512 default: /* fall-through */
513 break;
514 }
515
516 state->regs.cp2c[reg] = data;
517}
518
519void lightrec_mtc(struct lightrec_state *state, union code op, u32 data)
520{
521 if (op.i.op == OP_CP0)
522 lightrec_mtc0(state, op.r.rd, data);
523 else if (op.r.rs == OP_CP2_BASIC_CTC2)
524 lightrec_ctc2(state, op.r.rd, data);
525 else
526 lightrec_mtc2(state, op.r.rd, data);
d16005f8
PC		 527}
528
529static void lightrec_mtc_cb(struct lightrec_state *state, union code op)
530{
98fa08a5 531 lightrec_mtc(state, op, state->regs.gpr[op.r.rt]);
d16005f8
PC		 532}
533
98fa08a5 534void lightrec_rfe(struct lightrec_state *state)
d16005f8
PC		 535{
536 u32 status;
537
538 /* Read CP0 Status register (r12) */
98fa08a5 539 status = state->regs.cp0[12];
d16005f8
PC		 540
541 /* Switch the bits */
542 status = ((status & 0x3c) >> 2) | (status & ~0xf);
543
544 /* Write it back */
98fa08a5 545 lightrec_mtc0(state, 12, status);
d16005f8
PC		 546}
547
98fa08a5 548void lightrec_cp(struct lightrec_state *state, union code op)
d16005f8 549{
98fa08a5
PC		 550 if (op.i.op == OP_CP0) {
551 pr_err("Invalid CP opcode to coprocessor #0\n");
552 return;
553 }
d16005f8 554
98fa08a5 555 (*state->ops.cop2_op)(state, op.opcode);
d16005f8
PC		 556}
557
558static void lightrec_syscall_cb(struct lightrec_state *state, union code op)
559{
560 lightrec_set_exit_flags(state, LIGHTREC_EXIT_SYSCALL);
561}
562
563static void lightrec_break_cb(struct lightrec_state *state, union code op)
564{
565 lightrec_set_exit_flags(state, LIGHTREC_EXIT_BREAK);
566}
567
568struct block * lightrec_get_block(struct lightrec_state *state, u32 pc)
569{
570 struct block *block = lightrec_find_block(state->block_cache, pc);
571
98fa08a5 572 if (block && lightrec_block_is_outdated(state, block)) {
d16005f8
PC		 573 pr_debug("Block at PC 0x%08x is outdated!\n", block->pc);
574
575 /* Make sure the recompiler isn't processing the block we'll
576 * destroy */
577 if (ENABLE_THREADED_COMPILER)
578 lightrec_recompiler_remove(state->rec, block);
579
580 lightrec_unregister_block(state->block_cache, block);
a59e5536 581 remove_from_code_lut(state->block_cache, block);
98fa08a5 582 lightrec_free_block(state, block);
d16005f8
PC		 583 block = NULL;
584 }
585
586 if (!block) {
587 block = lightrec_precompile_block(state, pc);
588 if (!block) {
589 pr_err("Unable to recompile block at PC 0x%x\n", pc);
590 lightrec_set_exit_flags(state, LIGHTREC_EXIT_SEGFAULT);
591 return NULL;
592 }
593
594 lightrec_register_block(state->block_cache, block);
595 }
596
597 return block;
598}
599
600static void * get_next_block_func(struct lightrec_state *state, u32 pc)
601{
602 struct block *block;
603 bool should_recompile;
604 void *func;
605
606 for (;;) {
607 func = state->code_lut[lut_offset(pc)];
608 if (func && func != state->get_next_block)
98fa08a5 609 break;
d16005f8
PC		 610
611 block = lightrec_get_block(state, pc);
612
613 if (unlikely(!block))
98fa08a5
PC		 614 break;
615
616 if (OPT_REPLACE_MEMSET && (block->flags & BLOCK_IS_MEMSET)) {
617 func = state->memset_func;
618 break;
619 }
d16005f8 620
a59e5536 621 should_recompile = block->flags & BLOCK_SHOULD_RECOMPILE &&
622 !(block->flags & BLOCK_IS_DEAD);
d16005f8
PC		 623
624 if (unlikely(should_recompile)) {
a59e5536 625 pr_debug("Block at PC 0x%08x should recompile\n", pc);
d16005f8 626
d16005f8 627 lightrec_unregister(MEM_FOR_CODE, block->code_size);
a59e5536 628
629 if (ENABLE_THREADED_COMPILER)
630 lightrec_recompiler_add(state->rec, block);
631 else
98fa08a5 632 lightrec_compile_block(state->cstate, block);
d16005f8
PC		 633 }
634
635 if (ENABLE_THREADED_COMPILER && likely(!should_recompile))
98fa08a5 636 func = lightrec_recompiler_run_first_pass(state, block, &pc);
d16005f8
PC		 637 else
638 func = block->function;
639
640 if (likely(func))
98fa08a5 641 break;
d16005f8 642
98fa08a5
PC		 643 if (unlikely(block->flags & BLOCK_NEVER_COMPILE)) {
644 pc = lightrec_emulate_block(state, block, pc);
645
646 } else if (!ENABLE_THREADED_COMPILER) {
647 /* Block wasn't compiled yet - run the interpreter */
648 if (block->flags & BLOCK_FULLY_TAGGED)
649 pr_debug("Block fully tagged, skipping first pass\n");
650 else if (ENABLE_FIRST_PASS && likely(!should_recompile))
651 pc = lightrec_emulate_block(state, block, pc);
d16005f8 652
d16005f8 653 /* Then compile it using the profiled data */
98fa08a5
PC		 654 lightrec_compile_block(state->cstate, block);
655 } else {
656 lightrec_recompiler_add(state->rec, block);
d16005f8
PC		 657 }
658
659 if (state->exit_flags != LIGHTREC_EXIT_NORMAL ||
98fa08a5
PC		 660 state->current_cycle >= state->target_cycle)
661 break;
d16005f8 662 }
d16005f8 663
98fa08a5
PC		 664 state->next_pc = pc;
665 return func;
d16005f8
PC		 666}
667
668static s32 c_function_wrapper(struct lightrec_state *state, s32 cycles_delta,
98fa08a5
PC		 669 void (*f)(struct lightrec_state *, u32 d),
670 u32 d)
d16005f8
PC		 671{
672 state->current_cycle = state->target_cycle - cycles_delta;
673
98fa08a5 674 (*f)(state, d);
d16005f8
PC		 675
676 return state->target_cycle - state->current_cycle;
677}
678
98fa08a5 679static struct block * generate_wrapper(struct lightrec_state *state)
d16005f8
PC		 680{
681 struct block *block;
682 jit_state_t *_jit;
683 unsigned int i;
684 int stack_ptr;
685 jit_word_t code_size;
686 jit_node_t *to_tramp, *to_fn_epilog;
687
688 block = lightrec_malloc(state, MEM_FOR_IR, sizeof(*block));
689 if (!block)
690 goto err_no_mem;
691
692 _jit = jit_new_state();
693 if (!_jit)
694 goto err_free_block;
695
696 jit_name("RW wrapper");
697 jit_note(__FILE__, __LINE__);
698
699 /* Wrapper entry point */
700 jit_prolog();
701
702 stack_ptr = jit_allocai(sizeof(uintptr_t) * NUM_TEMPS);
703
704 for (i = 0; i < NUM_TEMPS; i++)
705 jit_stxi(stack_ptr + i * sizeof(uintptr_t), JIT_FP, JIT_R(i));
706
707 /* Jump to the trampoline */
708 to_tramp = jit_jmpi();
709
710 /* The trampoline will jump back here */
711 to_fn_epilog = jit_label();
712
713 for (i = 0; i < NUM_TEMPS; i++)
714 jit_ldxi(JIT_R(i), JIT_FP, stack_ptr + i * sizeof(uintptr_t));
715
716 jit_ret();
717 jit_epilog();
718
719 /* Trampoline entry point.
720 * The sole purpose of the trampoline is to cheese Lightning not to
721 * save/restore the callee-saved register LIGHTREC_REG_CYCLE, since we
722 * do want to return to the caller with this register modified. */
723 jit_prolog();
724 jit_tramp(256);
725 jit_patch(to_tramp);
726
727 jit_prepare();
728 jit_pushargr(LIGHTREC_REG_STATE);
729 jit_pushargr(LIGHTREC_REG_CYCLE);
d16005f8 730 jit_pushargr(JIT_R0);
98fa08a5
PC		 731 jit_pushargr(JIT_R1);
732 jit_finishi(c_function_wrapper);
d16005f8 733 jit_retval_i(LIGHTREC_REG_CYCLE);
d16005f8
PC		 734
735 jit_patch_at(jit_jmpi(), to_fn_epilog);
736 jit_epilog();
737
d16005f8
PC		 738 block->_jit = _jit;
739 block->function = jit_emit();
740 block->opcode_list = NULL;
741 block->flags = 0;
742 block->nb_ops = 0;
743
744 jit_get_code(&code_size);
745 lightrec_register(MEM_FOR_CODE, code_size);
746
747 block->code_size = code_size;
748
749 if (ENABLE_DISASSEMBLER) {
750 pr_debug("Wrapper block:\n");
751 jit_disassemble();
752 }
753
754 jit_clear_state();
755 return block;
756
757err_free_block:
758 lightrec_free(state, MEM_FOR_IR, sizeof(*block), block);
759err_no_mem:
760 pr_err("Unable to compile wrapper: Out of memory\n");
761 return NULL;
762}
763
98fa08a5
PC		 764static u32 lightrec_memset(struct lightrec_state *state)
765{
766 u32 kunseg_pc = kunseg(state->regs.gpr[4]);
767 void *host;
768 const struct lightrec_mem_map *map = lightrec_get_map(state, &host, kunseg_pc);
769 u32 length = state->regs.gpr[5] * 4;
770
771 if (!map) {
772 pr_err("Unable to find memory map for memset target address "
773 "0x%x\n", kunseg_pc);
774 return 0;
775 }
776
777 pr_debug("Calling host memset, PC 0x%x (host address 0x%" PRIxPTR ") for %u bytes\n",
778 kunseg_pc, (uintptr_t)host, length);
779 memset(host, 0, length);
780
781 if (!state->invalidate_from_dma_only)
782 lightrec_invalidate_map(state, map, kunseg_pc, length);
783
784 /* Rough estimation of the number of cycles consumed */
785 return 8 + 5 * (length + 3 / 4);
786}
787
d16005f8
PC		 788static struct block * generate_dispatcher(struct lightrec_state *state)
789{
790 struct block *block;
791 jit_state_t *_jit;
98fa08a5 792 jit_node_t *to_end, *to_c, *loop, *addr, *addr2, *addr3;
d16005f8
PC		 793 unsigned int i;
794 u32 offset, ram_len;
795 jit_word_t code_size;
796
797 block = lightrec_malloc(state, MEM_FOR_IR, sizeof(*block));
798 if (!block)
799 goto err_no_mem;
800
801 _jit = jit_new_state();
802 if (!_jit)
803 goto err_free_block;
804
805 jit_name("dispatcher");
806 jit_note(__FILE__, __LINE__);
807
808 jit_prolog();
809 jit_frame(256);
810
811 jit_getarg(JIT_R0, jit_arg());
d16005f8 812 jit_getarg_i(LIGHTREC_REG_CYCLE, jit_arg());
d16005f8
PC		 813
814 /* Force all callee-saved registers to be pushed on the stack */
815 for (i = 0; i < NUM_REGS; i++)
816 jit_movr(JIT_V(i), JIT_V(i));
817
818 /* Pass lightrec_state structure to blocks, using the last callee-saved
819 * register that Lightning provides */
820 jit_movi(LIGHTREC_REG_STATE, (intptr_t) state);
821
822 loop = jit_label();
823
824 /* Call the block's code */
825 jit_jmpr(JIT_R0);
826
98fa08a5
PC		 827 if (OPT_REPLACE_MEMSET) {
828 /* Blocks will jump here when they need to call
829 * lightrec_memset() */
830 addr3 = jit_indirect();
831
832 jit_prepare();
833 jit_pushargr(LIGHTREC_REG_STATE);
834 jit_finishi(lightrec_memset);
835
836 jit_ldxi_ui(JIT_V0, LIGHTREC_REG_STATE,
837 offsetof(struct lightrec_state, regs.gpr[31]));
838
839 jit_retval(JIT_R0);
840 jit_subr(LIGHTREC_REG_CYCLE, LIGHTREC_REG_CYCLE, JIT_R0);
841 }
842
d16005f8
PC		 843 /* The block will jump here, with the number of cycles remaining in
844 * LIGHTREC_REG_CYCLE */
845 addr2 = jit_indirect();
846
98fa08a5
PC		 847 /* Store back the next_pc to the lightrec_state structure */
848 offset = offsetof(struct lightrec_state, next_pc);
849 jit_stxi_i(offset, LIGHTREC_REG_STATE, JIT_V0);
850
d16005f8
PC		 851 /* Jump to end if state->target_cycle < state->current_cycle */
852 to_end = jit_blei(LIGHTREC_REG_CYCLE, 0);
853
854 /* Convert next PC to KUNSEG and avoid mirrors */
855 ram_len = state->maps[PSX_MAP_KERNEL_USER_RAM].length;
856 jit_andi(JIT_R0, JIT_V0, 0x10000000 | (ram_len - 1));
857 to_c = jit_bgei(JIT_R0, ram_len);
858
859 /* Fast path: code is running from RAM, use the code LUT */
98fa08a5
PC		 860 if (__WORDSIZE == 64)
861 jit_lshi(JIT_R0, JIT_R0, 1);
d16005f8
PC		 862 jit_addr(JIT_R0, JIT_R0, LIGHTREC_REG_STATE);
863 jit_ldxi(JIT_R0, JIT_R0, offsetof(struct lightrec_state, code_lut));
864
865 /* If we get non-NULL, loop */
866 jit_patch_at(jit_bnei(JIT_R0, 0), loop);
867
868 /* Slow path: call C function get_next_block_func() */
869 jit_patch(to_c);
870
98fa08a5 871 if (ENABLE_FIRST_PASS || OPT_DETECT_IMPOSSIBLE_BRANCHES) {
d16005f8
PC		 872 /* We may call the interpreter - update state->current_cycle */
873 jit_ldxi_i(JIT_R2, LIGHTREC_REG_STATE,
874 offsetof(struct lightrec_state, target_cycle));
875 jit_subr(JIT_R1, JIT_R2, LIGHTREC_REG_CYCLE);
876 jit_stxi_i(offsetof(struct lightrec_state, current_cycle),
877 LIGHTREC_REG_STATE, JIT_R1);
878 }
879
880 /* The code LUT will be set to this address when the block at the target
881 * PC has been preprocessed but not yet compiled by the threaded
882 * recompiler */
883 addr = jit_indirect();
884
885 /* Get the next block */
886 jit_prepare();
887 jit_pushargr(LIGHTREC_REG_STATE);
888 jit_pushargr(JIT_V0);
889 jit_finishi(&get_next_block_func);
890 jit_retval(JIT_R0);
891
98fa08a5 892 if (ENABLE_FIRST_PASS || OPT_DETECT_IMPOSSIBLE_BRANCHES) {
d16005f8
PC		 893 /* The interpreter may have updated state->current_cycle and
894 * state->target_cycle - recalc the delta */
895 jit_ldxi_i(JIT_R1, LIGHTREC_REG_STATE,
896 offsetof(struct lightrec_state, current_cycle));
897 jit_ldxi_i(JIT_R2, LIGHTREC_REG_STATE,
898 offsetof(struct lightrec_state, target_cycle));
899 jit_subr(LIGHTREC_REG_CYCLE, JIT_R2, JIT_R1);
900 }
901
902 /* If we get non-NULL, loop */
903 jit_patch_at(jit_bnei(JIT_R0, 0), loop);
904
d16005f8
PC		 905 /* When exiting, the recompiled code will jump to that address */
906 jit_note(__FILE__, __LINE__);
907 jit_patch(to_end);
908
d16005f8
PC		 909 jit_retr(LIGHTREC_REG_CYCLE);
910 jit_epilog();
911
d16005f8
PC		 912 block->_jit = _jit;
913 block->function = jit_emit();
914 block->opcode_list = NULL;
915 block->flags = 0;
916 block->nb_ops = 0;
917
918 jit_get_code(&code_size);
919 lightrec_register(MEM_FOR_CODE, code_size);
920
921 block->code_size = code_size;
922
923 state->eob_wrapper_func = jit_address(addr2);
98fa08a5
PC		 924 if (OPT_REPLACE_MEMSET)
925 state->memset_func = jit_address(addr3);
d16005f8
PC		 926 state->get_next_block = jit_address(addr);
927
928 if (ENABLE_DISASSEMBLER) {
929 pr_debug("Dispatcher block:\n");
930 jit_disassemble();
931 }
932
933 /* We're done! */
934 jit_clear_state();
935 return block;
936
937err_free_block:
938 lightrec_free(state, MEM_FOR_IR, sizeof(*block), block);
939err_no_mem:
940 pr_err("Unable to compile dispatcher: Out of memory\n");
941 return NULL;
942}
943
944union code lightrec_read_opcode(struct lightrec_state *state, u32 pc)
945{
98fa08a5 946 void *host;
d16005f8 947
98fa08a5 948 lightrec_get_map(state, &host, kunseg(pc));
d16005f8 949
98fa08a5
PC		 950 const u32 *code = (u32 *)host;
951 return (union code) *code;
952}
d16005f8 953
98fa08a5
PC		 954unsigned int lightrec_cycles_of_opcode(union code code)
955{
956 return 2;
957}
d16005f8 958
98fa08a5
PC		 959void lightrec_free_opcode_list(struct lightrec_state *state, struct block *block)
960{
961 lightrec_free(state, MEM_FOR_IR,
962 sizeof(*block->opcode_list) * block->nb_ops,
963 block->opcode_list);
964}
965
966static unsigned int lightrec_get_mips_block_len(const u32 *src)
967{
968 unsigned int i;
969 union code c;
970
971 for (i = 1; ; i++) {
972 c.opcode = LE32TOH(*src++);
973
974 if (is_syscall(c))
975 return i;
976
977 if (is_unconditional_jump(c))
978 return i + 1;
979 }
980}
981
982static struct opcode * lightrec_disassemble(struct lightrec_state *state,
983 const u32 *src, unsigned int *len)
984{
985 struct opcode *list;
986 unsigned int i, length;
987
988 length = lightrec_get_mips_block_len(src);
989
990 list = lightrec_malloc(state, MEM_FOR_IR, sizeof(*list) * length);
991 if (!list) {
992 pr_err("Unable to allocate memory\n");
993 return NULL;
994 }
995
996 for (i = 0; i < length; i++) {
997 list[i].opcode = LE32TOH(src[i]);
998 list[i].flags = 0;
999 }
1000
1001 *len = length * sizeof(u32);
1002
1003 return list;
d16005f8
PC		 1004}
1005
1006static struct block * lightrec_precompile_block(struct lightrec_state *state,
1007 u32 pc)
1008{
1009 struct opcode *list;
1010 struct block *block;
98fa08a5
PC		 1011 void *host;
1012 const struct lightrec_mem_map *map = lightrec_get_map(state, &host, kunseg(pc));
1013 const u32 *code = (u32 *) host;
d16005f8 1014 unsigned int length;
98fa08a5 1015 bool fully_tagged;
d16005f8
PC		 1016
1017 if (!map)
1018 return NULL;
1019
d16005f8
PC		 1020 block = lightrec_malloc(state, MEM_FOR_IR, sizeof(*block));
1021 if (!block) {
1022 pr_err("Unable to recompile block: Out of memory\n");
1023 return NULL;
1024 }
1025
1026 list = lightrec_disassemble(state, code, &length);
1027 if (!list) {
1028 lightrec_free(state, MEM_FOR_IR, sizeof(*block), block);
1029 return NULL;
1030 }
1031
1032 block->pc = pc;
d16005f8
PC		 1033 block->_jit = NULL;
1034 block->function = NULL;
1035 block->opcode_list = list;
98fa08a5 1036 block->code = code;
d16005f8
PC		 1037 block->next = NULL;
1038 block->flags = 0;
1039 block->code_size = 0;
1040#if ENABLE_THREADED_COMPILER
1041 block->op_list_freed = (atomic_flag)ATOMIC_FLAG_INIT;
1042#endif
1043 block->nb_ops = length / sizeof(u32);
1044
98fa08a5 1045 lightrec_optimize(state, block);
d16005f8
PC		 1046
1047 length = block->nb_ops * sizeof(u32);
1048
1049 lightrec_register(MEM_FOR_MIPS_CODE, length);
1050
1051 if (ENABLE_DISASSEMBLER) {
98fa08a5
PC		 1052 pr_debug("Disassembled block at PC: 0x%08x\n", block->pc);
1053 lightrec_print_disassembly(block, code);
d16005f8
PC		 1054 }
1055
98fa08a5 1056 pr_debug("Block size: %hu opcodes\n", block->nb_ops);
d16005f8
PC		 1057
1058 /* If the first opcode is an 'impossible' branch, never compile the
1059 * block */
98fa08a5 1060 if (should_emulate(block->opcode_list))
d16005f8
PC		 1061 block->flags |= BLOCK_NEVER_COMPILE;
1062
98fa08a5
PC		 1063 fully_tagged = lightrec_block_is_fully_tagged(block);
1064 if (fully_tagged)
1065 block->flags |= BLOCK_FULLY_TAGGED;
1066
1067 if (OPT_REPLACE_MEMSET && (block->flags & BLOCK_IS_MEMSET))
1068 state->code_lut[lut_offset(pc)] = state->memset_func;
1069
d16005f8
PC		 1070 block->hash = lightrec_calculate_block_hash(block);
1071
a59e5536 1072 pr_debug("Recompile count: %u\n", state->nb_precompile++);
1073
d16005f8
PC		 1074 return block;
1075}
1076
98fa08a5 1077static bool lightrec_block_is_fully_tagged(const struct block *block)
d16005f8 1078{
98fa08a5
PC		 1079 const struct opcode *op;
1080 unsigned int i;
1081
1082 for (i = 0; i < block->nb_ops; i++) {
1083 op = &block->opcode_list[i];
d16005f8 1084
d16005f8
PC		 1085 /* Verify that all load/stores of the opcode list
1086 * Check all loads/stores of the opcode list and mark the
1087 * block as fully compiled if they all have been tagged. */
1088 switch (op->c.i.op) {
1089 case OP_LB:
1090 case OP_LH:
1091 case OP_LWL:
1092 case OP_LW:
1093 case OP_LBU:
1094 case OP_LHU:
1095 case OP_LWR:
1096 case OP_SB:
1097 case OP_SH:
1098 case OP_SWL:
1099 case OP_SW:
1100 case OP_SWR:
1101 case OP_LWC2:
1102 case OP_SWC2:
1103 if (!(op->flags & (LIGHTREC_DIRECT_IO |
1104 LIGHTREC_HW_IO)))
1105 return false;
1106 default: /* fall-through */
1107 continue;
1108 }
1109 }
1110
1111 return true;
1112}
1113
98fa08a5 1114static void lightrec_reap_block(struct lightrec_state *state, void *data)
a59e5536 1115{
1116 struct block *block = data;
1117
1118 pr_debug("Reap dead block at PC 0x%08x\n", block->pc);
98fa08a5
PC		 1119 lightrec_unregister_block(state->block_cache, block);
1120 lightrec_free_block(state, block);
a59e5536 1121}
1122
98fa08a5 1123static void lightrec_reap_jit(struct lightrec_state *state, void *data)
a59e5536 1124{
1125 _jit_destroy_state(data);
1126}
1127
98fa08a5
PC		 1128int lightrec_compile_block(struct lightrec_cstate *cstate,
1129 struct block *block)
d16005f8 1130{
98fa08a5 1131 struct lightrec_state *state = cstate->state;
a59e5536 1132 struct lightrec_branch_target *target;
d16005f8 1133 bool op_list_freed = false, fully_tagged = false;
a59e5536 1134 struct block *block2;
d16005f8 1135 struct opcode *elm;
a59e5536 1136 jit_state_t *_jit, *oldjit;
d16005f8
PC		 1137 jit_node_t *start_of_block;
1138 bool skip_next = false;
1139 jit_word_t code_size;
1140 unsigned int i, j;
98fa08a5 1141 u32 offset;
d16005f8
PC		 1142
1143 fully_tagged = lightrec_block_is_fully_tagged(block);
1144 if (fully_tagged)
1145 block->flags |= BLOCK_FULLY_TAGGED;
1146
1147 _jit = jit_new_state();
1148 if (!_jit)
1149 return -ENOMEM;
1150
a59e5536 1151 oldjit = block->_jit;
d16005f8
PC		 1152 block->_jit = _jit;
1153
98fa08a5
PC		 1154 lightrec_regcache_reset(cstate->reg_cache);
1155 cstate->cycles = 0;
1156 cstate->nb_branches = 0;
1157 cstate->nb_local_branches = 0;
1158 cstate->nb_targets = 0;
d16005f8
PC		 1159
1160 jit_prolog();
1161 jit_tramp(256);
1162
1163 start_of_block = jit_label();
1164
98fa08a5
PC		 1165 for (i = 0; i < block->nb_ops; i++) {
1166 elm = &block->opcode_list[i];
d16005f8
PC		 1167
1168 if (skip_next) {
1169 skip_next = false;
1170 continue;
1171 }
1172
98fa08a5 1173 cstate->cycles += lightrec_cycles_of_opcode(elm->c);
d16005f8 1174
98fa08a5 1175 if (should_emulate(elm)) {
d16005f8 1176 pr_debug("Branch at offset 0x%x will be emulated\n",
98fa08a5
PC		 1177 i << 2);
1178
1179 lightrec_emit_eob(cstate, block, i, false);
d16005f8 1180 skip_next = !(elm->flags & LIGHTREC_NO_DS);
98fa08a5
PC		 1181 } else {
1182 lightrec_rec_opcode(cstate, block, i);
d16005f8
PC		 1183 skip_next = has_delay_slot(elm->c) &&
1184 !(elm->flags & LIGHTREC_NO_DS);
1185#if _WIN32
1186 /* FIXME: GNU Lightning on Windows seems to use our
1187 * mapped registers as temporaries. Until the actual bug
1188 * is found and fixed, unconditionally mark our
1189 * registers as live here. */
98fa08a5 1190 lightrec_regcache_mark_live(cstate->reg_cache, _jit);
d16005f8
PC		 1191#endif
1192 }
1193 }
1194
98fa08a5
PC		 1195 for (i = 0; i < cstate->nb_branches; i++)
1196 jit_patch(cstate->branches[i]);
d16005f8 1197
98fa08a5
PC		 1198 for (i = 0; i < cstate->nb_local_branches; i++) {
1199 struct lightrec_branch *branch = &cstate->local_branches[i];
d16005f8
PC		 1200
1201 pr_debug("Patch local branch to offset 0x%x\n",
1202 branch->target << 2);
1203
1204 if (branch->target == 0) {
1205 jit_patch_at(branch->branch, start_of_block);
1206 continue;
1207 }
1208
98fa08a5
PC		 1209 for (j = 0; j < cstate->nb_targets; j++) {
1210 if (cstate->targets[j].offset == branch->target) {
d16005f8 1211 jit_patch_at(branch->branch,
98fa08a5 1212 cstate->targets[j].label);
d16005f8
PC		 1213 break;
1214 }
1215 }
1216
98fa08a5 1217 if (j == cstate->nb_targets)
d16005f8
PC		 1218 pr_err("Unable to find branch target\n");
1219 }
1220
1221 jit_ldxi(JIT_R0, LIGHTREC_REG_STATE,
1222 offsetof(struct lightrec_state, eob_wrapper_func));
1223
1224 jit_jmpr(JIT_R0);
1225
1226 jit_ret();
1227 jit_epilog();
1228
1229 block->function = jit_emit();
a59e5536 1230 block->flags &= ~BLOCK_SHOULD_RECOMPILE;
d16005f8
PC		 1231
1232 /* Add compiled function to the LUT */
1233 state->code_lut[lut_offset(block->pc)] = block->function;
1234
98fa08a5
PC		 1235 if (ENABLE_THREADED_COMPILER) {
1236 /* Since we might try to reap the same block multiple times,
1237 * we need the reaper to wait until everything has been
1238 * submitted, so that the duplicate entries can be dropped. */
1239 lightrec_reaper_pause(state->reaper);
a59e5536 1240 }
1241
1242 /* Detect old blocks that have been covered by the new one */
98fa08a5
PC		 1243 for (i = 0; i < cstate->nb_targets; i++) {
1244 target = &cstate->targets[i];
a59e5536 1245
1246 if (!target->offset)
1247 continue;
1248
1249 offset = block->pc + target->offset * sizeof(u32);
1250 block2 = lightrec_find_block(state->block_cache, offset);
1251 if (block2) {
1252 /* No need to check if block2 is compilable - it must
1253 * be, otherwise block wouldn't be compilable either */
1254
98fa08a5
PC		 1255 /* Set the "block dead" flag to prevent the dynarec from
1256 * recompiling this block */
a59e5536 1257 block2->flags |= BLOCK_IS_DEAD;
1258
98fa08a5
PC		 1259 /* If block2 was pending for compilation, cancel it.
1260 * If it's being compiled right now, wait until it
1261 * finishes. */
1262 if (ENABLE_THREADED_COMPILER)
1263 lightrec_recompiler_remove(state->rec, block2);
1264
1265 /* We know from now on that block2 isn't going to be
1266 * compiled. We can override the LUT entry with our
1267 * new block's entry point. */
1268 offset = lut_offset(block->pc) + target->offset;
1269 state->code_lut[offset] = jit_address(target->label);
1270
a59e5536 1271 pr_debug("Reap block 0x%08x as it's covered by block "
1272 "0x%08x\n", block2->pc, block->pc);
1273
98fa08a5 1274 /* Finally, reap the block. */
a59e5536 1275 if (ENABLE_THREADED_COMPILER) {
a59e5536 1276 lightrec_reaper_add(state->reaper,
1277 lightrec_reap_block,
1278 block2);
1279 } else {
98fa08a5
PC		 1280 lightrec_unregister_block(state->block_cache, block2);
1281 lightrec_free_block(state, block2);
a59e5536 1282 }
1283 }
1284 }
1285
b19ddc79 1286 if (ENABLE_THREADED_COMPILER)
98fa08a5
PC		 1287 lightrec_reaper_continue(state->reaper);
1288
d16005f8
PC		 1289 jit_get_code(&code_size);
1290 lightrec_register(MEM_FOR_CODE, code_size);
1291
1292 block->code_size = code_size;
1293
1294 if (ENABLE_DISASSEMBLER) {
98fa08a5 1295 pr_debug("Compiling block at PC: 0x%08x\n", block->pc);
d16005f8
PC		 1296 jit_disassemble();
1297 }
1298
1299 jit_clear_state();
1300
1301#if ENABLE_THREADED_COMPILER
1302 if (fully_tagged)
1303 op_list_freed = atomic_flag_test_and_set(&block->op_list_freed);
1304#endif
1305 if (fully_tagged && !op_list_freed) {
1306 pr_debug("Block PC 0x%08x is fully tagged"
1307 " - free opcode list\n", block->pc);
98fa08a5 1308 lightrec_free_opcode_list(state, block);
d16005f8
PC		 1309 block->opcode_list = NULL;
1310 }
1311
a59e5536 1312 if (oldjit) {
1313 pr_debug("Block 0x%08x recompiled, reaping old jit context.\n",
1314 block->pc);
1315
1316 if (ENABLE_THREADED_COMPILER)
1317 lightrec_reaper_add(state->reaper,
1318 lightrec_reap_jit, oldjit);
1319 else
1320 _jit_destroy_state(oldjit);
1321 }
1322
d16005f8
PC		 1323 return 0;
1324}
1325
98fa08a5
PC		 1326static void lightrec_print_info(struct lightrec_state *state)
1327{
1328 if ((state->current_cycle & ~0xfffffff) != state->old_cycle_counter) {
1329 pr_info("Lightrec RAM usage: IR %u KiB, CODE %u KiB, "
1330 "MIPS %u KiB, TOTAL %u KiB, avg. IPI %f\n",
1331 lightrec_get_mem_usage(MEM_FOR_IR) / 1024,
1332 lightrec_get_mem_usage(MEM_FOR_CODE) / 1024,
1333 lightrec_get_mem_usage(MEM_FOR_MIPS_CODE) / 1024,
1334 lightrec_get_total_mem_usage() / 1024,
1335 lightrec_get_average_ipi());
1336 state->old_cycle_counter = state->current_cycle & ~0xfffffff;
1337 }
1338}
1339
d16005f8
PC		 1340u32 lightrec_execute(struct lightrec_state *state, u32 pc, u32 target_cycle)
1341{
1342 s32 (*func)(void *, s32) = (void *)state->dispatcher->function;
1343 void *block_trace;
1344 s32 cycles_delta;
1345
1346 state->exit_flags = LIGHTREC_EXIT_NORMAL;
1347
1348 /* Handle the cycle counter overflowing */
1349 if (unlikely(target_cycle < state->current_cycle))
1350 target_cycle = UINT_MAX;
1351
1352 state->target_cycle = target_cycle;
98fa08a5 1353 state->next_pc = pc;
d16005f8
PC		 1354
1355 block_trace = get_next_block_func(state, pc);
1356 if (block_trace) {
1357 cycles_delta = state->target_cycle - state->current_cycle;
1358
1359 cycles_delta = (*func)(block_trace, cycles_delta);
1360
1361 state->current_cycle = state->target_cycle - cycles_delta;
1362 }
1363
a59e5536 1364 if (ENABLE_THREADED_COMPILER)
1365 lightrec_reaper_reap(state->reaper);
1366
98fa08a5
PC		 1367 if (LOG_LEVEL >= INFO_L)
1368 lightrec_print_info(state);
1369
d16005f8
PC		 1370 return state->next_pc;
1371}
1372
1373u32 lightrec_execute_one(struct lightrec_state *state, u32 pc)
1374{
1375 return lightrec_execute(state, pc, state->current_cycle);
1376}
1377
1378u32 lightrec_run_interpreter(struct lightrec_state *state, u32 pc)
1379{
1380 struct block *block = lightrec_get_block(state, pc);
1381 if (!block)
1382 return 0;
1383
1384 state->exit_flags = LIGHTREC_EXIT_NORMAL;
1385
98fa08a5
PC		 1386 pc = lightrec_emulate_block(state, block, pc);
1387
1388 if (LOG_LEVEL >= INFO_L)
1389 lightrec_print_info(state);
1390
1391 return pc;
d16005f8
PC		 1392}
1393
98fa08a5 1394void lightrec_free_block(struct lightrec_state *state, struct block *block)
d16005f8
PC		 1395{
1396 lightrec_unregister(MEM_FOR_MIPS_CODE, block->nb_ops * sizeof(u32));
1397 if (block->opcode_list)
98fa08a5 1398 lightrec_free_opcode_list(state, block);
d16005f8
PC		 1399 if (block->_jit)
1400 _jit_destroy_state(block->_jit);
1401 lightrec_unregister(MEM_FOR_CODE, block->code_size);
98fa08a5
PC		 1402 lightrec_free(state, MEM_FOR_IR, sizeof(*block), block);
1403}
1404
1405struct lightrec_cstate * lightrec_create_cstate(struct lightrec_state *state)
1406{
1407 struct lightrec_cstate *cstate;
1408
1409 cstate = lightrec_malloc(state, MEM_FOR_LIGHTREC, sizeof(*cstate));
1410 if (!cstate)
1411 return NULL;
1412
1413 cstate->reg_cache = lightrec_regcache_init(state);
1414 if (!cstate->reg_cache) {
1415 lightrec_free(state, MEM_FOR_LIGHTREC, sizeof(*cstate), cstate);
1416 return NULL;
1417 }
1418
1419 cstate->state = state;
1420
1421 return cstate;
1422}
1423
1424void lightrec_free_cstate(struct lightrec_cstate *cstate)
1425{
1426 lightrec_free_regcache(cstate->reg_cache);
1427 lightrec_free(cstate->state, MEM_FOR_LIGHTREC, sizeof(*cstate), cstate);
d16005f8
PC		 1428}
1429
1430struct lightrec_state * lightrec_init(char *argv0,
1431 const struct lightrec_mem_map *map,
1432 size_t nb,
1433 const struct lightrec_ops *ops)
1434{
1435 struct lightrec_state *state;
1436
1437 /* Sanity-check ops */
98fa08a5 1438 if (!ops || !ops->cop2_op || !ops->enable_ram) {
d16005f8
PC		 1439 pr_err("Missing callbacks in lightrec_ops structure\n");
1440 return NULL;
1441 }
1442
1443 init_jit(argv0);
1444
1445 state = calloc(1, sizeof(*state) +
1446 sizeof(*state->code_lut) * CODE_LUT_SIZE);
1447 if (!state)
1448 goto err_finish_jit;
1449
1450 lightrec_register(MEM_FOR_LIGHTREC, sizeof(*state) +
1451 sizeof(*state->code_lut) * CODE_LUT_SIZE);
1452
1453#if ENABLE_TINYMM
1454 state->tinymm = tinymm_init(malloc, free, 4096);
1455 if (!state->tinymm)
1456 goto err_free_state;
1457#endif
1458
1459 state->block_cache = lightrec_blockcache_init(state);
1460 if (!state->block_cache)
1461 goto err_free_tinymm;
1462
d16005f8
PC		 1463 if (ENABLE_THREADED_COMPILER) {
1464 state->rec = lightrec_recompiler_init(state);
1465 if (!state->rec)
98fa08a5 1466 goto err_free_block_cache;
a59e5536 1467
1468 state->reaper = lightrec_reaper_init(state);
1469 if (!state->reaper)
1470 goto err_free_recompiler;
98fa08a5
PC		 1471 } else {
1472 state->cstate = lightrec_create_cstate(state);
1473 if (!state->cstate)
1474 goto err_free_block_cache;
d16005f8
PC		 1475 }
1476
1477 state->nb_maps = nb;
1478 state->maps = map;
1479
1480 memcpy(&state->ops, ops, sizeof(*ops));
1481
1482 state->dispatcher = generate_dispatcher(state);
1483 if (!state->dispatcher)
a59e5536 1484 goto err_free_reaper;
d16005f8 1485
98fa08a5
PC		 1486 state->c_wrapper_block = generate_wrapper(state);
1487 if (!state->c_wrapper_block)
d16005f8
PC		 1488 goto err_free_dispatcher;
1489
98fa08a5
PC		 1490 state->c_wrapper = state->c_wrapper_block->function;
1491
1492 state->c_wrappers[C_WRAPPER_RW] = lightrec_rw_cb;
1493 state->c_wrappers[C_WRAPPER_RW_GENERIC] = lightrec_rw_generic_cb;
1494 state->c_wrappers[C_WRAPPER_MFC] = lightrec_mfc_cb;
1495 state->c_wrappers[C_WRAPPER_MTC] = lightrec_mtc_cb;
1496 state->c_wrappers[C_WRAPPER_CP] = lightrec_cp;
1497 state->c_wrappers[C_WRAPPER_SYSCALL] = lightrec_syscall_cb;
1498 state->c_wrappers[C_WRAPPER_BREAK] = lightrec_break_cb;
d16005f8
PC		 1499
1500 map = &state->maps[PSX_MAP_BIOS];
1501 state->offset_bios = (uintptr_t)map->address - map->pc;
1502
1503 map = &state->maps[PSX_MAP_SCRATCH_PAD];
1504 state->offset_scratch = (uintptr_t)map->address - map->pc;
1505
1506 map = &state->maps[PSX_MAP_KERNEL_USER_RAM];
1507 state->offset_ram = (uintptr_t)map->address - map->pc;
1508
1509 if (state->maps[PSX_MAP_MIRROR1].address == map->address + 0x200000 &&
1510 state->maps[PSX_MAP_MIRROR2].address == map->address + 0x400000 &&
1511 state->maps[PSX_MAP_MIRROR3].address == map->address + 0x600000)
1512 state->mirrors_mapped = true;
1513
98fa08a5
PC		 1514 if (state->offset_bios == 0 &&
1515 state->offset_scratch == 0 &&
1516 state->offset_ram == 0 &&
1517 state->mirrors_mapped) {
1518 pr_info("Memory map is perfect. Emitted code will be best.\n");
1519 } else {
1520 pr_info("Memory map is sub-par. Emitted code will be slow.\n");
1521 }
1522
d16005f8
PC		 1523 return state;
1524
d16005f8 1525err_free_dispatcher:
98fa08a5 1526 lightrec_free_block(state, state->dispatcher);
a59e5536 1527err_free_reaper:
1528 if (ENABLE_THREADED_COMPILER)
1529 lightrec_reaper_destroy(state->reaper);
d16005f8
PC		 1530err_free_recompiler:
1531 if (ENABLE_THREADED_COMPILER)
1532 lightrec_free_recompiler(state->rec);
98fa08a5
PC		 1533 else
1534 lightrec_free_cstate(state->cstate);
d16005f8
PC		 1535err_free_block_cache:
1536 lightrec_free_block_cache(state->block_cache);
1537err_free_tinymm:
1538#if ENABLE_TINYMM
1539 tinymm_shutdown(state->tinymm);
1540err_free_state:
1541#endif
1542 lightrec_unregister(MEM_FOR_LIGHTREC, sizeof(*state) +
1543 sizeof(*state->code_lut) * CODE_LUT_SIZE);
1544 free(state);
1545err_finish_jit:
1546 finish_jit();
1547 return NULL;
1548}
1549
1550void lightrec_destroy(struct lightrec_state *state)
1551{
98fa08a5
PC		 1552 /* Force a print info on destroy*/
1553 state->current_cycle = ~state->current_cycle;
1554 lightrec_print_info(state);
1555
a59e5536 1556 if (ENABLE_THREADED_COMPILER) {
d16005f8 1557 lightrec_free_recompiler(state->rec);
a59e5536 1558 lightrec_reaper_destroy(state->reaper);
98fa08a5
PC		 1559 } else {
1560 lightrec_free_cstate(state->cstate);
a59e5536 1561 }
d16005f8 1562
d16005f8 1563 lightrec_free_block_cache(state->block_cache);
98fa08a5
PC		 1564 lightrec_free_block(state, state->dispatcher);
1565 lightrec_free_block(state, state->c_wrapper_block);
d16005f8
PC		 1566 finish_jit();
1567
1568#if ENABLE_TINYMM
1569 tinymm_shutdown(state->tinymm);
1570#endif
1571 lightrec_unregister(MEM_FOR_LIGHTREC, sizeof(*state) +
1572 sizeof(*state->code_lut) * CODE_LUT_SIZE);
1573 free(state);
1574}
1575
1576void lightrec_invalidate(struct lightrec_state *state, u32 addr, u32 len)
1577{
1578 u32 kaddr = kunseg(addr & ~0x3);
98fa08a5 1579 const struct lightrec_mem_map *map = lightrec_get_map(state, NULL, kaddr);
d16005f8
PC		 1580
1581 if (map) {
d16005f8
PC		 1582 if (map != &state->maps[PSX_MAP_KERNEL_USER_RAM])
1583 return;
1584
1585 /* Handle mirrors */
1586 kaddr &= (state->maps[PSX_MAP_KERNEL_USER_RAM].length - 1);
1587
98fa08a5 1588 lightrec_invalidate_map(state, map, kaddr, len);
d16005f8
PC		 1589 }
1590}
1591
1592void lightrec_invalidate_all(struct lightrec_state *state)
1593{
1594 memset(state->code_lut, 0, sizeof(*state->code_lut) * CODE_LUT_SIZE);
1595}
1596
1597void lightrec_set_invalidate_mode(struct lightrec_state *state, bool dma_only)
1598{
1599 if (state->invalidate_from_dma_only != dma_only)
1600 lightrec_invalidate_all(state);
1601
1602 state->invalidate_from_dma_only = dma_only;
1603}
1604
1605void lightrec_set_exit_flags(struct lightrec_state *state, u32 flags)
1606{
1607 if (flags != LIGHTREC_EXIT_NORMAL) {
1608 state->exit_flags |= flags;
1609 state->target_cycle = state->current_cycle;
1610 }
1611}
1612
1613u32 lightrec_exit_flags(struct lightrec_state *state)
1614{
1615 return state->exit_flags;
1616}
1617
d16005f8
PC		 1618u32 lightrec_current_cycle_count(const struct lightrec_state *state)
1619{
1620 return state->current_cycle;
1621}
1622
1623void lightrec_reset_cycle_count(struct lightrec_state *state, u32 cycles)
1624{
1625 state->current_cycle = cycles;
1626
1627 if (state->target_cycle < cycles)
1628 state->target_cycle = cycles;
1629}
1630
1631void lightrec_set_target_cycle_count(struct lightrec_state *state, u32 cycles)
1632{
1633 if (state->exit_flags == LIGHTREC_EXIT_NORMAL) {
1634 if (cycles < state->current_cycle)
1635 cycles = state->current_cycle;
1636
1637 state->target_cycle = cycles;
1638 }
1639}
98fa08a5
PC		 1640
1641struct lightrec_registers * lightrec_get_registers(struct lightrec_state *state)
1642{
1643 return &state->regs;
1644}
ARM optimized PCSX fork