1 /* 1
2 * This file is subject to the terms and condi
3 * License. See the file "COPYING" in the mai
4 * for more details.
5 *
6 * A small micro-assembler. It is intentionall
7 * support a subset of instructions, and does
8 * effects like branch delay slots.
9 *
10 * Copyright (C) 2004, 2005, 2006, 2008 Thiem
11 * Copyright (C) 2005, 2007 Maciej W. Rozycki
12 * Copyright (C) 2006 Ralf Baechle (ralf@linu
13 * Copyright (C) 2012, 2013 MIPS Technologies
14 */
15
16 enum fields {
17 RS = 0x001,
18 RT = 0x002,
19 RD = 0x004,
20 RE = 0x008,
21 SIMM = 0x010,
22 UIMM = 0x020,
23 BIMM = 0x040,
24 JIMM = 0x080,
25 FUNC = 0x100,
26 SET = 0x200,
27 SCIMM = 0x400,
28 SIMM9 = 0x800,
29 };
30
31 #define OP_MASK 0x3f
32 #define OP_SH 26
33 #define RD_MASK 0x1f
34 #define RD_SH 11
35 #define RE_MASK 0x1f
36 #define RE_SH 6
37 #define IMM_MASK 0xffff
38 #define IMM_SH 0
39 #define JIMM_MASK 0x3ffffff
40 #define JIMM_SH 0
41 #define FUNC_MASK 0x3f
42 #define FUNC_SH 0
43 #define SET_MASK 0x7
44 #define SET_SH 0
45 #define SIMM9_SH 7
46 #define SIMM9_MASK 0x1ff
47
48 enum opcode {
49 insn_addiu, insn_addu, insn_and, insn_
50 insn_beq, insn_beql, insn_bgez, insn_b
51 insn_bltz, insn_bltzl, insn_bne, insn_
52 insn_cfcmsa, insn_ctc1, insn_ctcmsa, i
53 insn_ddivu_r6, insn_di, insn_dins, ins
54 insn_divu_r6, insn_dmfc0, insn_dmodu,
55 insn_dmulu, insn_drotr, insn_drotr32,
56 insn_dsll32, insn_dsllv, insn_dsra, in
57 insn_dsrl32, insn_dsrlv, insn_dsubu, i
58 insn_j, insn_jal, insn_jalr, insn_jr,
59 insn_lddir, insn_ldpte, insn_ldx, insn
60 insn_lui, insn_lw, insn_lwu, insn_lwx,
61 insn_mflo, insn_modu, insn_movn, insn_
62 insn_mthi, insn_mtlo, insn_mul, insn_m
63 insn_or, insn_ori, insn_pref, insn_rfe
64 insn_scd, insn_seleqz, insn_selnez, in
65 insn_sllv, insn_slt, insn_slti, insn_s
66 insn_srav, insn_srl, insn_srlv, insn_s
67 insn_syscall, insn_tlbp, insn_tlbr, in
68 insn_wsbh, insn_xor, insn_xori, insn_y
69 insn_invalid /* insn_invalid must be l
70 };
71
72 struct insn {
73 u32 match;
74 enum fields fields;
75 };
76
77 static inline u32 build_rs(u32 arg)
78 {
79 WARN(arg & ~RS_MASK, KERN_WARNING "Mic
80
81 return (arg & RS_MASK) << RS_SH;
82 }
83
84 static inline u32 build_rt(u32 arg)
85 {
86 WARN(arg & ~RT_MASK, KERN_WARNING "Mic
87
88 return (arg & RT_MASK) << RT_SH;
89 }
90
91 static inline u32 build_rd(u32 arg)
92 {
93 WARN(arg & ~RD_MASK, KERN_WARNING "Mic
94
95 return (arg & RD_MASK) << RD_SH;
96 }
97
98 static inline u32 build_re(u32 arg)
99 {
100 WARN(arg & ~RE_MASK, KERN_WARNING "Mic
101
102 return (arg & RE_MASK) << RE_SH;
103 }
104
105 static inline u32 build_simm(s32 arg)
106 {
107 WARN(arg > 0x7fff || arg < -0x8000,
108 KERN_WARNING "Micro-assembler fie
109
110 return arg & 0xffff;
111 }
112
113 static inline u32 build_uimm(u32 arg)
114 {
115 WARN(arg & ~IMM_MASK, KERN_WARNING "Mi
116
117 return arg & IMM_MASK;
118 }
119
120 static inline u32 build_scimm(u32 arg)
121 {
122 WARN(arg & ~SCIMM_MASK,
123 KERN_WARNING "Micro-assembler fie
124
125 return (arg & SCIMM_MASK) << SCIMM_SH;
126 }
127
128 static inline u32 build_scimm9(s32 arg)
129 {
130 WARN((arg > 0xff || arg < -0x100),
131 KERN_WARNING "Micro-assembler f
132
133 return (arg & SIMM9_MASK) << SIMM9_SH;
134 }
135
136 static inline u32 build_func(u32 arg)
137 {
138 WARN(arg & ~FUNC_MASK, KERN_WARNING "M
139
140 return arg & FUNC_MASK;
141 }
142
143 static inline u32 build_set(u32 arg)
144 {
145 WARN(arg & ~SET_MASK, KERN_WARNING "Mi
146
147 return arg & SET_MASK;
148 }
149
150 static void build_insn(u32 **buf, enum opcode
151
152 #define I_u1u2u3(op)
153 Ip_u1u2u3(op)
154 {
155 build_insn(buf, insn##op, a, b, c);
156 }
157 UASM_EXPORT_SYMBOL(uasm_i##op);
158
159 #define I_s3s1s2(op)
160 Ip_s3s1s2(op)
161 {
162 build_insn(buf, insn##op, b, c, a);
163 }
164 UASM_EXPORT_SYMBOL(uasm_i##op);
165
166 #define I_u2u1u3(op)
167 Ip_u2u1u3(op)
168 {
169 build_insn(buf, insn##op, b, a, c);
170 }
171 UASM_EXPORT_SYMBOL(uasm_i##op);
172
173 #define I_u3u2u1(op)
174 Ip_u3u2u1(op)
175 {
176 build_insn(buf, insn##op, c, b, a);
177 }
178 UASM_EXPORT_SYMBOL(uasm_i##op);
179
180 #define I_u3u1u2(op)
181 Ip_u3u1u2(op)
182 {
183 build_insn(buf, insn##op, b, c, a);
184 }
185 UASM_EXPORT_SYMBOL(uasm_i##op);
186
187 #define I_u1u2s3(op)
188 Ip_u1u2s3(op)
189 {
190 build_insn(buf, insn##op, a, b, c);
191 }
192 UASM_EXPORT_SYMBOL(uasm_i##op);
193
194 #define I_u2s3u1(op)
195 Ip_u2s3u1(op)
196 {
197 build_insn(buf, insn##op, c, a, b);
198 }
199 UASM_EXPORT_SYMBOL(uasm_i##op);
200
201 #define I_u2u1s3(op)
202 Ip_u2u1s3(op)
203 {
204 build_insn(buf, insn##op, b, a, c);
205 }
206 UASM_EXPORT_SYMBOL(uasm_i##op);
207
208 #define I_u2u1msbu3(op)
209 Ip_u2u1msbu3(op)
210 {
211 build_insn(buf, insn##op, b, a, c+d-1,
212 }
213 UASM_EXPORT_SYMBOL(uasm_i##op);
214
215 #define I_u2u1msb32u3(op)
216 Ip_u2u1msbu3(op)
217 {
218 build_insn(buf, insn##op, b, a, c+d-33
219 }
220 UASM_EXPORT_SYMBOL(uasm_i##op);
221
222 #define I_u2u1msb32msb3(op)
223 Ip_u2u1msbu3(op)
224 {
225 build_insn(buf, insn##op, b, a, c+d-33
226 }
227 UASM_EXPORT_SYMBOL(uasm_i##op);
228
229 #define I_u2u1msbdu3(op)
230 Ip_u2u1msbu3(op)
231 {
232 build_insn(buf, insn##op, b, a, d-1, c
233 }
234 UASM_EXPORT_SYMBOL(uasm_i##op);
235
236 #define I_u1u2(op)
237 Ip_u1u2(op)
238 {
239 build_insn(buf, insn##op, a, b);
240 }
241 UASM_EXPORT_SYMBOL(uasm_i##op);
242
243 #define I_u2u1(op)
244 Ip_u1u2(op)
245 {
246 build_insn(buf, insn##op, b, a);
247 }
248 UASM_EXPORT_SYMBOL(uasm_i##op);
249
250 #define I_u1s2(op)
251 Ip_u1s2(op)
252 {
253 build_insn(buf, insn##op, a, b);
254 }
255 UASM_EXPORT_SYMBOL(uasm_i##op);
256
257 #define I_u1(op)
258 Ip_u1(op)
259 {
260 build_insn(buf, insn##op, a);
261 }
262 UASM_EXPORT_SYMBOL(uasm_i##op);
263
264 #define I_0(op)
265 Ip_0(op)
266 {
267 build_insn(buf, insn##op);
268 }
269 UASM_EXPORT_SYMBOL(uasm_i##op);
270
271 I_u2u1s3(_addiu)
272 I_u3u1u2(_addu)
273 I_u2u1u3(_andi)
274 I_u3u1u2(_and)
275 I_u1u2s3(_beq)
276 I_u1u2s3(_beql)
277 I_u1s2(_bgez)
278 I_u1s2(_bgezl)
279 I_u1s2(_bgtz)
280 I_u1s2(_blez)
281 I_u1s2(_bltz)
282 I_u1s2(_bltzl)
283 I_u1u2s3(_bne)
284 I_u1(_break)
285 I_u2s3u1(_cache)
286 I_u1u2(_cfc1)
287 I_u2u1(_cfcmsa)
288 I_u1u2(_ctc1)
289 I_u2u1(_ctcmsa)
290 I_u1u2(_ddivu)
291 I_u3u1u2(_ddivu_r6)
292 I_u1u2u3(_dmfc0)
293 I_u3u1u2(_dmodu)
294 I_u1u2u3(_dmtc0)
295 I_u1u2(_dmultu)
296 I_u3u1u2(_dmulu)
297 I_u2u1s3(_daddiu)
298 I_u3u1u2(_daddu)
299 I_u1(_di);
300 I_u1u2(_divu)
301 I_u3u1u2(_divu_r6)
302 I_u2u1(_dsbh);
303 I_u2u1(_dshd);
304 I_u2u1u3(_dsll)
305 I_u2u1u3(_dsll32)
306 I_u3u2u1(_dsllv)
307 I_u2u1u3(_dsra)
308 I_u2u1u3(_dsra32)
309 I_u3u2u1(_dsrav)
310 I_u2u1u3(_dsrl)
311 I_u2u1u3(_dsrl32)
312 I_u3u2u1(_dsrlv)
313 I_u2u1u3(_drotr)
314 I_u2u1u3(_drotr32)
315 I_u3u1u2(_dsubu)
316 I_0(_eret)
317 I_u2u1msbdu3(_ext)
318 I_u2u1msbu3(_ins)
319 I_u1(_j)
320 I_u1(_jal)
321 I_u2u1(_jalr)
322 I_u1(_jr)
323 I_u2s3u1(_lb)
324 I_u2s3u1(_lbu)
325 I_u2s3u1(_ld)
326 I_u2s3u1(_lh)
327 I_u2s3u1(_lhu)
328 I_u2s3u1(_ll)
329 I_u2s3u1(_lld)
330 I_u1s2(_lui)
331 I_u2s3u1(_lw)
332 I_u2s3u1(_lwu)
333 I_u1u2u3(_mfc0)
334 I_u1u2u3(_mfhc0)
335 I_u3u1u2(_modu)
336 I_u3u1u2(_movn)
337 I_u3u1u2(_movz)
338 I_u1(_mfhi)
339 I_u1(_mflo)
340 I_u1u2u3(_mtc0)
341 I_u1u2u3(_mthc0)
342 I_u1(_mthi)
343 I_u1(_mtlo)
344 I_u3u1u2(_mul)
345 I_u1u2(_multu)
346 I_u3u1u2(_mulu)
347 I_u3u1u2(_muhu)
348 I_u3u1u2(_nor)
349 I_u3u1u2(_or)
350 I_u2u1u3(_ori)
351 I_0(_rfe)
352 I_u2s3u1(_sb)
353 I_u2s3u1(_sc)
354 I_u2s3u1(_scd)
355 I_u2s3u1(_sd)
356 I_u3u1u2(_seleqz)
357 I_u3u1u2(_selnez)
358 I_u2s3u1(_sh)
359 I_u2u1u3(_sll)
360 I_u3u2u1(_sllv)
361 I_s3s1s2(_slt)
362 I_u2u1s3(_slti)
363 I_u2u1s3(_sltiu)
364 I_u3u1u2(_sltu)
365 I_u2u1u3(_sra)
366 I_u3u2u1(_srav)
367 I_u2u1u3(_srl)
368 I_u3u2u1(_srlv)
369 I_u2u1u3(_rotr)
370 I_u3u1u2(_subu)
371 I_u2s3u1(_sw)
372 I_u1(_sync)
373 I_0(_tlbp)
374 I_0(_tlbr)
375 I_0(_tlbwi)
376 I_0(_tlbwr)
377 I_u1(_wait);
378 I_u2u1(_wsbh)
379 I_u3u1u2(_xor)
380 I_u2u1u3(_xori)
381 I_u2u1(_yield)
382 I_u2u1msbu3(_dins);
383 I_u2u1msb32u3(_dinsm);
384 I_u2u1msb32msb3(_dinsu);
385 I_u1(_syscall);
386 I_u1u2s3(_bbit0);
387 I_u1u2s3(_bbit1);
388 I_u3u1u2(_lwx)
389 I_u3u1u2(_ldx)
390 I_u1u2(_ldpte)
391 I_u2u1u3(_lddir)
392
393 #ifdef CONFIG_CPU_CAVIUM_OCTEON
394 #include <asm/octeon/octeon.h>
395 void uasm_i_pref(u32 **buf, unsigned int a, si
396 unsigned int c)
397 {
398 if (OCTEON_IS_MODEL(OCTEON_CN6XXX) &&
399 /*
400 * As per erratum Core-14449,
401 * 6-24 with 'pref 28'.
402 */
403 build_insn(buf, insn_pref, c,
404 else
405 build_insn(buf, insn_pref, c,
406 }
407 UASM_EXPORT_SYMBOL(uasm_i_pref);
408 #else
409 I_u2s3u1(_pref)
410 #endif
411
412 /* Handle labels. */
413 void uasm_build_label(struct uasm_label **lab,
414 {
415 (*lab)->addr = addr;
416 (*lab)->lab = lid;
417 (*lab)++;
418 }
419 UASM_EXPORT_SYMBOL(uasm_build_label);
420
421 int uasm_in_compat_space_p(long addr)
422 {
423 /* Is this address in 32bit compat spa
424 return addr == (int)addr;
425 }
426 UASM_EXPORT_SYMBOL(uasm_in_compat_space_p);
427
428 static int uasm_rel_highest(long val)
429 {
430 #ifdef CONFIG_64BIT
431 return ((((val + 0x800080008000L) >> 4
432 #else
433 return 0;
434 #endif
435 }
436
437 static int uasm_rel_higher(long val)
438 {
439 #ifdef CONFIG_64BIT
440 return ((((val + 0x80008000L) >> 32) &
441 #else
442 return 0;
443 #endif
444 }
445
446 int uasm_rel_hi(long val)
447 {
448 return ((((val + 0x8000L) >> 16) & 0xf
449 }
450 UASM_EXPORT_SYMBOL(uasm_rel_hi);
451
452 int uasm_rel_lo(long val)
453 {
454 return ((val & 0xffff) ^ 0x8000) - 0x8
455 }
456 UASM_EXPORT_SYMBOL(uasm_rel_lo);
457
458 void UASM_i_LA_mostly(u32 **buf, unsigned int
459 {
460 if (!uasm_in_compat_space_p(addr)) {
461 uasm_i_lui(buf, rs, uasm_rel_h
462 if (uasm_rel_higher(addr))
463 uasm_i_daddiu(buf, rs,
464 if (uasm_rel_hi(addr)) {
465 uasm_i_dsll(buf, rs, r
466 uasm_i_daddiu(buf, rs,
467 uasm_r
468 uasm_i_dsll(buf, rs, r
469 } else
470 uasm_i_dsll32(buf, rs,
471 } else
472 uasm_i_lui(buf, rs, uasm_rel_h
473 }
474 UASM_EXPORT_SYMBOL(UASM_i_LA_mostly);
475
476 void UASM_i_LA(u32 **buf, unsigned int rs, lon
477 {
478 UASM_i_LA_mostly(buf, rs, addr);
479 if (uasm_rel_lo(addr)) {
480 if (!uasm_in_compat_space_p(ad
481 uasm_i_daddiu(buf, rs,
482 uasm_r
483 else
484 uasm_i_addiu(buf, rs,
485 uasm_r
486 }
487 }
488 UASM_EXPORT_SYMBOL(UASM_i_LA);
489
490 /* Handle relocations. */
491 void uasm_r_mips_pc16(struct uasm_reloc **rel,
492 {
493 (*rel)->addr = addr;
494 (*rel)->type = R_MIPS_PC16;
495 (*rel)->lab = lid;
496 (*rel)++;
497 }
498 UASM_EXPORT_SYMBOL(uasm_r_mips_pc16);
499
500 static inline void __resolve_relocs(struct uas
501 struct uas
502
503 void uasm_resolve_relocs(struct uasm_reloc *re
504 struct uasm_
505 {
506 struct uasm_label *l;
507
508 for (; rel->lab != UASM_LABEL_INVALID;
509 for (l = lab; l->lab != UASM_L
510 if (rel->lab == l->lab
511 __resolve_relo
512 }
513 UASM_EXPORT_SYMBOL(uasm_resolve_relocs);
514
515 void uasm_move_relocs(struct uasm_reloc *rel,
516 long off)
517 {
518 for (; rel->lab != UASM_LABEL_INVALID;
519 if (rel->addr >= first && rel-
520 rel->addr += off;
521 }
522 UASM_EXPORT_SYMBOL(uasm_move_relocs);
523
524 void uasm_move_labels(struct uasm_label *lab,
525 long off)
526 {
527 for (; lab->lab != UASM_LABEL_INVALID;
528 if (lab->addr >= first && lab-
529 lab->addr += off;
530 }
531 UASM_EXPORT_SYMBOL(uasm_move_labels);
532
533 void uasm_copy_handler(struct uasm_reloc *rel,
534 u32 *first, u3
535 {
536 long off = (long)(target - first);
537
538 memcpy(target, first, (end - first) *
539
540 uasm_move_relocs(rel, first, end, off)
541 uasm_move_labels(lab, first, end, off)
542 }
543 UASM_EXPORT_SYMBOL(uasm_copy_handler);
544
545 int uasm_insn_has_bdelay(struct uasm_reloc *re
546 {
547 for (; rel->lab != UASM_LABEL_INVALID;
548 if (rel->addr == addr
549 && (rel->type == R_MIPS_PC
550 || rel->type == R_MIPS
551 return 1;
552 }
553
554 return 0;
555 }
556 UASM_EXPORT_SYMBOL(uasm_insn_has_bdelay);
557
558 /* Convenience functions for labeled branches.
559 void uasm_il_bltz(u32 **p, struct uasm_reloc *
560 int lid)
561 {
562 uasm_r_mips_pc16(r, *p, lid);
563 uasm_i_bltz(p, reg, 0);
564 }
565 UASM_EXPORT_SYMBOL(uasm_il_bltz);
566
567 void uasm_il_b(u32 **p, struct uasm_reloc **r,
568 {
569 uasm_r_mips_pc16(r, *p, lid);
570 uasm_i_b(p, 0);
571 }
572 UASM_EXPORT_SYMBOL(uasm_il_b);
573
574 void uasm_il_beq(u32 **p, struct uasm_reloc **
575 unsigned int r2, int
576 {
577 uasm_r_mips_pc16(r, *p, lid);
578 uasm_i_beq(p, r1, r2, 0);
579 }
580 UASM_EXPORT_SYMBOL(uasm_il_beq);
581
582 void uasm_il_beqz(u32 **p, struct uasm_reloc *
583 int lid)
584 {
585 uasm_r_mips_pc16(r, *p, lid);
586 uasm_i_beqz(p, reg, 0);
587 }
588 UASM_EXPORT_SYMBOL(uasm_il_beqz);
589
590 void uasm_il_beqzl(u32 **p, struct uasm_reloc
591 int lid)
592 {
593 uasm_r_mips_pc16(r, *p, lid);
594 uasm_i_beqzl(p, reg, 0);
595 }
596 UASM_EXPORT_SYMBOL(uasm_il_beqzl);
597
598 void uasm_il_bne(u32 **p, struct uasm_reloc **
599 unsigned int reg2, i
600 {
601 uasm_r_mips_pc16(r, *p, lid);
602 uasm_i_bne(p, reg1, reg2, 0);
603 }
604 UASM_EXPORT_SYMBOL(uasm_il_bne);
605
606 void uasm_il_bnez(u32 **p, struct uasm_reloc *
607 int lid)
608 {
609 uasm_r_mips_pc16(r, *p, lid);
610 uasm_i_bnez(p, reg, 0);
611 }
612 UASM_EXPORT_SYMBOL(uasm_il_bnez);
613
614 void uasm_il_bgezl(u32 **p, struct uasm_reloc
615 int lid)
616 {
617 uasm_r_mips_pc16(r, *p, lid);
618 uasm_i_bgezl(p, reg, 0);
619 }
620 UASM_EXPORT_SYMBOL(uasm_il_bgezl);
621
622 void uasm_il_bgez(u32 **p, struct uasm_reloc *
623 int lid)
624 {
625 uasm_r_mips_pc16(r, *p, lid);
626 uasm_i_bgez(p, reg, 0);
627 }
628 UASM_EXPORT_SYMBOL(uasm_il_bgez);
629
630 void uasm_il_bbit0(u32 **p, struct uasm_reloc
631 unsigned int bit,
632 {
633 uasm_r_mips_pc16(r, *p, lid);
634 uasm_i_bbit0(p, reg, bit, 0);
635 }
636 UASM_EXPORT_SYMBOL(uasm_il_bbit0);
637
638 void uasm_il_bbit1(u32 **p, struct uasm_reloc
639 unsigned int bit,
640 {
641 uasm_r_mips_pc16(r, *p, lid);
642 uasm_i_bbit1(p, reg, bit, 0);
643 }
644 UASM_EXPORT_SYMBOL(uasm_il_bbit1);
645
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