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uasm.c
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1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License. See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * A small micro-assembler. It is intentionally kept simple, does only
7  * support a subset of instructions, and does not try to hide pipeline
8  * effects like branch delay slots.
9  *
10  * Copyright (C) 2004, 2005, 2006, 2008 Thiemo Seufer
11  * Copyright (C) 2005, 2007 Maciej W. Rozycki
12  * Copyright (C) 2006 Ralf Baechle ([email protected])
13  */
14 
15 #include <linux/kernel.h>
16 #include <linux/types.h>
17 #include <linux/init.h>
18 
19 #include <asm/inst.h>
20 #include <asm/elf.h>
21 #include <asm/bugs.h>
22 #include <asm/uasm.h>
23 
24 enum fields {
25  RS = 0x001,
26  RT = 0x002,
27  RD = 0x004,
28  RE = 0x008,
29  SIMM = 0x010,
30  UIMM = 0x020,
31  BIMM = 0x040,
32  JIMM = 0x080,
33  FUNC = 0x100,
34  SET = 0x200,
35  SCIMM = 0x400
36 };
37 
38 #define OP_MASK 0x3f
39 #define OP_SH 26
40 #define RS_MASK 0x1f
41 #define RS_SH 21
42 #define RT_MASK 0x1f
43 #define RT_SH 16
44 #define RD_MASK 0x1f
45 #define RD_SH 11
46 #define RE_MASK 0x1f
47 #define RE_SH 6
48 #define IMM_MASK 0xffff
49 #define IMM_SH 0
50 #define JIMM_MASK 0x3ffffff
51 #define JIMM_SH 0
52 #define FUNC_MASK 0x3f
53 #define FUNC_SH 0
54 #define SET_MASK 0x7
55 #define SET_SH 0
56 #define SCIMM_MASK 0xfffff
57 #define SCIMM_SH 6
58 
59 enum opcode {
60  insn_invalid,
61  insn_addiu, insn_addu, insn_and, insn_andi, insn_bbit0, insn_bbit1,
62  insn_beq, insn_beql, insn_bgez, insn_bgezl, insn_bltz, insn_bltzl,
63  insn_bne, insn_cache, insn_daddiu, insn_daddu, insn_dins, insn_dinsm,
64  insn_dmfc0, insn_dmtc0, insn_drotr, insn_drotr32, insn_dsll,
65  insn_dsll32, insn_dsra, insn_dsrl, insn_dsrl32, insn_dsubu, insn_eret,
66  insn_ext, insn_ins, insn_j, insn_jal, insn_jr, insn_ld, insn_ldx,
67  insn_ll, insn_lld, insn_lui, insn_lw, insn_lwx, insn_mfc0, insn_mtc0,
68  insn_or, insn_ori, insn_pref, insn_rfe, insn_rotr, insn_sc, insn_scd,
69  insn_sd, insn_sll, insn_sra, insn_srl, insn_subu, insn_sw,
70  insn_syscall, insn_tlbp, insn_tlbr, insn_tlbwi, insn_tlbwr, insn_xor,
71  insn_xori,
72 };
73 
74 struct insn {
75  enum opcode opcode;
76  u32 match;
77  enum fields fields;
78 };
79 
80 /* This macro sets the non-variable bits of an instruction. */
81 #define M(a, b, c, d, e, f) \
82  ((a) << OP_SH \
83  | (b) << RS_SH \
84  | (c) << RT_SH \
85  | (d) << RD_SH \
86  | (e) << RE_SH \
87  | (f) << FUNC_SH)
88 
89 static struct insn insn_table[] __uasminitdata = {
90  { insn_addiu, M(addiu_op, 0, 0, 0, 0, 0), RS | RT | SIMM },
91  { insn_addu, M(spec_op, 0, 0, 0, 0, addu_op), RS | RT | RD },
92  { insn_andi, M(andi_op, 0, 0, 0, 0, 0), RS | RT | UIMM },
93  { insn_and, M(spec_op, 0, 0, 0, 0, and_op), RS | RT | RD },
94  { insn_bbit0, M(lwc2_op, 0, 0, 0, 0, 0), RS | RT | BIMM },
95  { insn_bbit1, M(swc2_op, 0, 0, 0, 0, 0), RS | RT | BIMM },
96  { insn_beql, M(beql_op, 0, 0, 0, 0, 0), RS | RT | BIMM },
97  { insn_beq, M(beq_op, 0, 0, 0, 0, 0), RS | RT | BIMM },
98  { insn_bgezl, M(bcond_op, 0, bgezl_op, 0, 0, 0), RS | BIMM },
99  { insn_bgez, M(bcond_op, 0, bgez_op, 0, 0, 0), RS | BIMM },
100  { insn_bltzl, M(bcond_op, 0, bltzl_op, 0, 0, 0), RS | BIMM },
101  { insn_bltz, M(bcond_op, 0, bltz_op, 0, 0, 0), RS | BIMM },
102  { insn_bne, M(bne_op, 0, 0, 0, 0, 0), RS | RT | BIMM },
103  { insn_cache, M(cache_op, 0, 0, 0, 0, 0), RS | RT | SIMM },
104  { insn_daddiu, M(daddiu_op, 0, 0, 0, 0, 0), RS | RT | SIMM },
105  { insn_daddu, M(spec_op, 0, 0, 0, 0, daddu_op), RS | RT | RD },
106  { insn_dinsm, M(spec3_op, 0, 0, 0, 0, dinsm_op), RS | RT | RD | RE },
107  { insn_dins, M(spec3_op, 0, 0, 0, 0, dins_op), RS | RT | RD | RE },
108  { insn_dmfc0, M(cop0_op, dmfc_op, 0, 0, 0, 0), RT | RD | SET},
109  { insn_dmtc0, M(cop0_op, dmtc_op, 0, 0, 0, 0), RT | RD | SET},
110  { insn_drotr32, M(spec_op, 1, 0, 0, 0, dsrl32_op), RT | RD | RE },
111  { insn_drotr, M(spec_op, 1, 0, 0, 0, dsrl_op), RT | RD | RE },
112  { insn_dsll32, M(spec_op, 0, 0, 0, 0, dsll32_op), RT | RD | RE },
113  { insn_dsll, M(spec_op, 0, 0, 0, 0, dsll_op), RT | RD | RE },
114  { insn_dsra, M(spec_op, 0, 0, 0, 0, dsra_op), RT | RD | RE },
115  { insn_dsrl32, M(spec_op, 0, 0, 0, 0, dsrl32_op), RT | RD | RE },
116  { insn_dsrl, M(spec_op, 0, 0, 0, 0, dsrl_op), RT | RD | RE },
117  { insn_dsubu, M(spec_op, 0, 0, 0, 0, dsubu_op), RS | RT | RD },
118  { insn_eret, M(cop0_op, cop_op, 0, 0, 0, eret_op), 0 },
119  { insn_ext, M(spec3_op, 0, 0, 0, 0, ext_op), RS | RT | RD | RE },
120  { insn_ins, M(spec3_op, 0, 0, 0, 0, ins_op), RS | RT | RD | RE },
121  { insn_j, M(j_op, 0, 0, 0, 0, 0), JIMM },
122  { insn_jal, M(jal_op, 0, 0, 0, 0, 0), JIMM },
123  { insn_j, M(j_op, 0, 0, 0, 0, 0), JIMM },
124  { insn_jr, M(spec_op, 0, 0, 0, 0, jr_op), RS },
125  { insn_ld, M(ld_op, 0, 0, 0, 0, 0), RS | RT | SIMM },
126  { insn_ldx, M(spec3_op, 0, 0, 0, ldx_op, lx_op), RS | RT | RD },
127  { insn_lld, M(lld_op, 0, 0, 0, 0, 0), RS | RT | SIMM },
128  { insn_ll, M(ll_op, 0, 0, 0, 0, 0), RS | RT | SIMM },
129  { insn_lui, M(lui_op, 0, 0, 0, 0, 0), RT | SIMM },
130  { insn_lw, M(lw_op, 0, 0, 0, 0, 0), RS | RT | SIMM },
131  { insn_lwx, M(spec3_op, 0, 0, 0, lwx_op, lx_op), RS | RT | RD },
132  { insn_mfc0, M(cop0_op, mfc_op, 0, 0, 0, 0), RT | RD | SET},
133  { insn_mtc0, M(cop0_op, mtc_op, 0, 0, 0, 0), RT | RD | SET},
134  { insn_ori, M(ori_op, 0, 0, 0, 0, 0), RS | RT | UIMM },
135  { insn_or, M(spec_op, 0, 0, 0, 0, or_op), RS | RT | RD },
136  { insn_pref, M(pref_op, 0, 0, 0, 0, 0), RS | RT | SIMM },
137  { insn_rfe, M(cop0_op, cop_op, 0, 0, 0, rfe_op), 0 },
138  { insn_rotr, M(spec_op, 1, 0, 0, 0, srl_op), RT | RD | RE },
139  { insn_scd, M(scd_op, 0, 0, 0, 0, 0), RS | RT | SIMM },
140  { insn_sc, M(sc_op, 0, 0, 0, 0, 0), RS | RT | SIMM },
141  { insn_sd, M(sd_op, 0, 0, 0, 0, 0), RS | RT | SIMM },
142  { insn_sll, M(spec_op, 0, 0, 0, 0, sll_op), RT | RD | RE },
143  { insn_sra, M(spec_op, 0, 0, 0, 0, sra_op), RT | RD | RE },
144  { insn_srl, M(spec_op, 0, 0, 0, 0, srl_op), RT | RD | RE },
145  { insn_subu, M(spec_op, 0, 0, 0, 0, subu_op), RS | RT | RD },
146  { insn_sw, M(sw_op, 0, 0, 0, 0, 0), RS | RT | SIMM },
147  { insn_syscall, M(spec_op, 0, 0, 0, 0, syscall_op), SCIMM},
148  { insn_tlbp, M(cop0_op, cop_op, 0, 0, 0, tlbp_op), 0 },
149  { insn_tlbr, M(cop0_op, cop_op, 0, 0, 0, tlbr_op), 0 },
150  { insn_tlbwi, M(cop0_op, cop_op, 0, 0, 0, tlbwi_op), 0 },
151  { insn_tlbwr, M(cop0_op, cop_op, 0, 0, 0, tlbwr_op), 0 },
152  { insn_xori, M(xori_op, 0, 0, 0, 0, 0), RS | RT | UIMM },
153  { insn_xor, M(spec_op, 0, 0, 0, 0, xor_op), RS | RT | RD },
154  { insn_invalid, 0, 0 }
155 };
156 
157 #undef M
158 
159 static inline __uasminit u32 build_rs(u32 arg)
160 {
161  WARN(arg & ~RS_MASK, KERN_WARNING "Micro-assembler field overflow\n");
162 
163  return (arg & RS_MASK) << RS_SH;
164 }
165 
166 static inline __uasminit u32 build_rt(u32 arg)
167 {
168  WARN(arg & ~RT_MASK, KERN_WARNING "Micro-assembler field overflow\n");
169 
170  return (arg & RT_MASK) << RT_SH;
171 }
172 
173 static inline __uasminit u32 build_rd(u32 arg)
174 {
175  WARN(arg & ~RD_MASK, KERN_WARNING "Micro-assembler field overflow\n");
176 
177  return (arg & RD_MASK) << RD_SH;
178 }
179 
180 static inline __uasminit u32 build_re(u32 arg)
181 {
182  WARN(arg & ~RE_MASK, KERN_WARNING "Micro-assembler field overflow\n");
183 
184  return (arg & RE_MASK) << RE_SH;
185 }
186 
187 static inline __uasminit u32 build_simm(s32 arg)
188 {
189  WARN(arg > 0x7fff || arg < -0x8000,
190  KERN_WARNING "Micro-assembler field overflow\n");
191 
192  return arg & 0xffff;
193 }
194 
195 static inline __uasminit u32 build_uimm(u32 arg)
196 {
197  WARN(arg & ~IMM_MASK, KERN_WARNING "Micro-assembler field overflow\n");
198 
199  return arg & IMM_MASK;
200 }
201 
202 static inline __uasminit u32 build_bimm(s32 arg)
203 {
204  WARN(arg > 0x1ffff || arg < -0x20000,
205  KERN_WARNING "Micro-assembler field overflow\n");
206 
207  WARN(arg & 0x3, KERN_WARNING "Invalid micro-assembler branch target\n");
208 
209  return ((arg < 0) ? (1 << 15) : 0) | ((arg >> 2) & 0x7fff);
210 }
211 
212 static inline __uasminit u32 build_jimm(u32 arg)
213 {
214  WARN(arg & ~(JIMM_MASK << 2),
215  KERN_WARNING "Micro-assembler field overflow\n");
216 
217  return (arg >> 2) & JIMM_MASK;
218 }
219 
220 static inline __uasminit u32 build_scimm(u32 arg)
221 {
222  WARN(arg & ~SCIMM_MASK,
223  KERN_WARNING "Micro-assembler field overflow\n");
224 
225  return (arg & SCIMM_MASK) << SCIMM_SH;
226 }
227 
228 static inline __uasminit u32 build_func(u32 arg)
229 {
230  WARN(arg & ~FUNC_MASK, KERN_WARNING "Micro-assembler field overflow\n");
231 
232  return arg & FUNC_MASK;
233 }
234 
235 static inline __uasminit u32 build_set(u32 arg)
236 {
237  WARN(arg & ~SET_MASK, KERN_WARNING "Micro-assembler field overflow\n");
238 
239  return arg & SET_MASK;
240 }
241 
242 /*
243  * The order of opcode arguments is implicitly left to right,
244  * starting with RS and ending with FUNC or IMM.
245  */
246 static void __uasminit build_insn(u32 **buf, enum opcode opc, ...)
247 {
248  struct insn *ip = NULL;
249  unsigned int i;
250  va_list ap;
251  u32 op;
252 
253  for (i = 0; insn_table[i].opcode != insn_invalid; i++)
254  if (insn_table[i].opcode == opc) {
255  ip = &insn_table[i];
256  break;
257  }
258 
259  if (!ip || (opc == insn_daddiu && r4k_daddiu_bug()))
260  panic("Unsupported Micro-assembler instruction %d", opc);
261 
262  op = ip->match;
263  va_start(ap, opc);
264  if (ip->fields & RS)
265  op |= build_rs(va_arg(ap, u32));
266  if (ip->fields & RT)
267  op |= build_rt(va_arg(ap, u32));
268  if (ip->fields & RD)
269  op |= build_rd(va_arg(ap, u32));
270  if (ip->fields & RE)
271  op |= build_re(va_arg(ap, u32));
272  if (ip->fields & SIMM)
273  op |= build_simm(va_arg(ap, s32));
274  if (ip->fields & UIMM)
275  op |= build_uimm(va_arg(ap, u32));
276  if (ip->fields & BIMM)
277  op |= build_bimm(va_arg(ap, s32));
278  if (ip->fields & JIMM)
279  op |= build_jimm(va_arg(ap, u32));
280  if (ip->fields & FUNC)
281  op |= build_func(va_arg(ap, u32));
282  if (ip->fields & SET)
283  op |= build_set(va_arg(ap, u32));
284  if (ip->fields & SCIMM)
285  op |= build_scimm(va_arg(ap, u32));
286  va_end(ap);
287 
288  **buf = op;
289  (*buf)++;
290 }
291 
292 #define I_u1u2u3(op) \
293 Ip_u1u2u3(op) \
294 { \
295  build_insn(buf, insn##op, a, b, c); \
296 } \
297 UASM_EXPORT_SYMBOL(uasm_i##op);
298 
299 #define I_u2u1u3(op) \
300 Ip_u2u1u3(op) \
301 { \
302  build_insn(buf, insn##op, b, a, c); \
303 } \
304 UASM_EXPORT_SYMBOL(uasm_i##op);
305 
306 #define I_u3u1u2(op) \
307 Ip_u3u1u2(op) \
308 { \
309  build_insn(buf, insn##op, b, c, a); \
310 } \
311 UASM_EXPORT_SYMBOL(uasm_i##op);
312 
313 #define I_u1u2s3(op) \
314 Ip_u1u2s3(op) \
315 { \
316  build_insn(buf, insn##op, a, b, c); \
317 } \
318 UASM_EXPORT_SYMBOL(uasm_i##op);
319 
320 #define I_u2s3u1(op) \
321 Ip_u2s3u1(op) \
322 { \
323  build_insn(buf, insn##op, c, a, b); \
324 } \
325 UASM_EXPORT_SYMBOL(uasm_i##op);
326 
327 #define I_u2u1s3(op) \
328 Ip_u2u1s3(op) \
329 { \
330  build_insn(buf, insn##op, b, a, c); \
331 } \
332 UASM_EXPORT_SYMBOL(uasm_i##op);
333 
334 #define I_u2u1msbu3(op) \
335 Ip_u2u1msbu3(op) \
336 { \
337  build_insn(buf, insn##op, b, a, c+d-1, c); \
338 } \
339 UASM_EXPORT_SYMBOL(uasm_i##op);
340 
341 #define I_u2u1msb32u3(op) \
342 Ip_u2u1msbu3(op) \
343 { \
344  build_insn(buf, insn##op, b, a, c+d-33, c); \
345 } \
346 UASM_EXPORT_SYMBOL(uasm_i##op);
347 
348 #define I_u2u1msbdu3(op) \
349 Ip_u2u1msbu3(op) \
350 { \
351  build_insn(buf, insn##op, b, a, d-1, c); \
352 } \
353 UASM_EXPORT_SYMBOL(uasm_i##op);
354 
355 #define I_u1u2(op) \
356 Ip_u1u2(op) \
357 { \
358  build_insn(buf, insn##op, a, b); \
359 } \
360 UASM_EXPORT_SYMBOL(uasm_i##op);
361 
362 #define I_u1s2(op) \
363 Ip_u1s2(op) \
364 { \
365  build_insn(buf, insn##op, a, b); \
366 } \
367 UASM_EXPORT_SYMBOL(uasm_i##op);
368 
369 #define I_u1(op) \
370 Ip_u1(op) \
371 { \
372  build_insn(buf, insn##op, a); \
373 } \
374 UASM_EXPORT_SYMBOL(uasm_i##op);
375 
376 #define I_0(op) \
377 Ip_0(op) \
378 { \
379  build_insn(buf, insn##op); \
380 } \
381 UASM_EXPORT_SYMBOL(uasm_i##op);
382 
383 I_u2u1s3(_addiu)
384 I_u3u1u2(_addu)
385 I_u2u1u3(_andi)
386 I_u3u1u2(_and)
387 I_u1u2s3(_beq)
388 I_u1u2s3(_beql)
389 I_u1s2(_bgez)
390 I_u1s2(_bgezl)
391 I_u1s2(_bltz)
392 I_u1s2(_bltzl)
393 I_u1u2s3(_bne)
394 I_u2s3u1(_cache)
395 I_u1u2u3(_dmfc0)
396 I_u1u2u3(_dmtc0)
397 I_u2u1s3(_daddiu)
398 I_u3u1u2(_daddu)
399 I_u2u1u3(_dsll)
400 I_u2u1u3(_dsll32)
401 I_u2u1u3(_dsra)
402 I_u2u1u3(_dsrl)
403 I_u2u1u3(_dsrl32)
404 I_u2u1u3(_drotr)
405 I_u2u1u3(_drotr32)
406 I_u3u1u2(_dsubu)
407 I_0(_eret)
408 I_u2u1msbdu3(_ext)
409 I_u2u1msbu3(_ins)
410 I_u1(_j)
411 I_u1(_jal)
412 I_u1(_jr)
413 I_u2s3u1(_ld)
414 I_u2s3u1(_ll)
415 I_u2s3u1(_lld)
416 I_u1s2(_lui)
417 I_u2s3u1(_lw)
418 I_u1u2u3(_mfc0)
419 I_u1u2u3(_mtc0)
420 I_u2u1u3(_ori)
421 I_u3u1u2(_or)
422 I_0(_rfe)
423 I_u2s3u1(_sc)
424 I_u2s3u1(_scd)
425 I_u2s3u1(_sd)
426 I_u2u1u3(_sll)
427 I_u2u1u3(_sra)
428 I_u2u1u3(_srl)
429 I_u2u1u3(_rotr)
430 I_u3u1u2(_subu)
431 I_u2s3u1(_sw)
432 I_0(_tlbp)
433 I_0(_tlbr)
434 I_0(_tlbwi)
435 I_0(_tlbwr)
436 I_u3u1u2(_xor)
437 I_u2u1u3(_xori)
438 I_u2u1msbu3(_dins);
439 I_u2u1msb32u3(_dinsm);
440 I_u1(_syscall);
441 I_u1u2s3(_bbit0);
442 I_u1u2s3(_bbit1);
443 I_u3u1u2(_lwx)
444 I_u3u1u2(_ldx)
445 
446 #ifdef CONFIG_CPU_CAVIUM_OCTEON
447 #include <asm/octeon/octeon.h>
448 void __uasminit uasm_i_pref(u32 **buf, unsigned int a, signed int b,
449  unsigned int c)
450 {
451  if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_X) && a <= 24 && a != 5)
452  /*
453  * As per erratum Core-14449, replace prefetches 0-4,
454  * 6-24 with 'pref 28'.
455  */
456  build_insn(buf, insn_pref, c, 28, b);
457  else
458  build_insn(buf, insn_pref, c, a, b);
459 }
460 UASM_EXPORT_SYMBOL(uasm_i_pref);
461 #else
462 I_u2s3u1(_pref)
463 #endif
464 
465 /* Handle labels. */
466 void __uasminit uasm_build_label(struct uasm_label **lab, u32 *addr, int lid)
467 {
468  (*lab)->addr = addr;
469  (*lab)->lab = lid;
470  (*lab)++;
471 }
472 UASM_EXPORT_SYMBOL(uasm_build_label);
473 
474 int __uasminit uasm_in_compat_space_p(long addr)
475 {
476  /* Is this address in 32bit compat space? */
477 #ifdef CONFIG_64BIT
478  return (((addr) & 0xffffffff00000000L) == 0xffffffff00000000L);
479 #else
480  return 1;
481 #endif
482 }
483 UASM_EXPORT_SYMBOL(uasm_in_compat_space_p);
484 
485 static int __uasminit uasm_rel_highest(long val)
486 {
487 #ifdef CONFIG_64BIT
488  return ((((val + 0x800080008000L) >> 48) & 0xffff) ^ 0x8000) - 0x8000;
489 #else
490  return 0;
491 #endif
492 }
493 
494 static int __uasminit uasm_rel_higher(long val)
495 {
496 #ifdef CONFIG_64BIT
497  return ((((val + 0x80008000L) >> 32) & 0xffff) ^ 0x8000) - 0x8000;
498 #else
499  return 0;
500 #endif
501 }
502 
503 int __uasminit uasm_rel_hi(long val)
504 {
505  return ((((val + 0x8000L) >> 16) & 0xffff) ^ 0x8000) - 0x8000;
506 }
507 UASM_EXPORT_SYMBOL(uasm_rel_hi);
508 
509 int __uasminit uasm_rel_lo(long val)
510 {
511  return ((val & 0xffff) ^ 0x8000) - 0x8000;
512 }
513 UASM_EXPORT_SYMBOL(uasm_rel_lo);
514 
515 void __uasminit UASM_i_LA_mostly(u32 **buf, unsigned int rs, long addr)
516 {
517  if (!uasm_in_compat_space_p(addr)) {
518  uasm_i_lui(buf, rs, uasm_rel_highest(addr));
519  if (uasm_rel_higher(addr))
520  uasm_i_daddiu(buf, rs, rs, uasm_rel_higher(addr));
521  if (uasm_rel_hi(addr)) {
522  uasm_i_dsll(buf, rs, rs, 16);
523  uasm_i_daddiu(buf, rs, rs, uasm_rel_hi(addr));
524  uasm_i_dsll(buf, rs, rs, 16);
525  } else
526  uasm_i_dsll32(buf, rs, rs, 0);
527  } else
528  uasm_i_lui(buf, rs, uasm_rel_hi(addr));
529 }
530 UASM_EXPORT_SYMBOL(UASM_i_LA_mostly);
531 
532 void __uasminit UASM_i_LA(u32 **buf, unsigned int rs, long addr)
533 {
534  UASM_i_LA_mostly(buf, rs, addr);
535  if (uasm_rel_lo(addr)) {
536  if (!uasm_in_compat_space_p(addr))
537  uasm_i_daddiu(buf, rs, rs, uasm_rel_lo(addr));
538  else
539  uasm_i_addiu(buf, rs, rs, uasm_rel_lo(addr));
540  }
541 }
542 UASM_EXPORT_SYMBOL(UASM_i_LA);
543 
544 /* Handle relocations. */
545 void __uasminit
546 uasm_r_mips_pc16(struct uasm_reloc **rel, u32 *addr, int lid)
547 {
548  (*rel)->addr = addr;
549  (*rel)->type = R_MIPS_PC16;
550  (*rel)->lab = lid;
551  (*rel)++;
552 }
553 UASM_EXPORT_SYMBOL(uasm_r_mips_pc16);
554 
555 static inline void __uasminit
556 __resolve_relocs(struct uasm_reloc *rel, struct uasm_label *lab)
557 {
558  long laddr = (long)lab->addr;
559  long raddr = (long)rel->addr;
560 
561  switch (rel->type) {
562  case R_MIPS_PC16:
563  *rel->addr |= build_bimm(laddr - (raddr + 4));
564  break;
565 
566  default:
567  panic("Unsupported Micro-assembler relocation %d",
568  rel->type);
569  }
570 }
571 
572 void __uasminit
573 uasm_resolve_relocs(struct uasm_reloc *rel, struct uasm_label *lab)
574 {
575  struct uasm_label *l;
576 
577  for (; rel->lab != UASM_LABEL_INVALID; rel++)
578  for (l = lab; l->lab != UASM_LABEL_INVALID; l++)
579  if (rel->lab == l->lab)
580  __resolve_relocs(rel, l);
581 }
582 UASM_EXPORT_SYMBOL(uasm_resolve_relocs);
583 
584 void __uasminit
585 uasm_move_relocs(struct uasm_reloc *rel, u32 *first, u32 *end, long off)
586 {
587  for (; rel->lab != UASM_LABEL_INVALID; rel++)
588  if (rel->addr >= first && rel->addr < end)
589  rel->addr += off;
590 }
591 UASM_EXPORT_SYMBOL(uasm_move_relocs);
592 
593 void __uasminit
594 uasm_move_labels(struct uasm_label *lab, u32 *first, u32 *end, long off)
595 {
596  for (; lab->lab != UASM_LABEL_INVALID; lab++)
597  if (lab->addr >= first && lab->addr < end)
598  lab->addr += off;
599 }
600 UASM_EXPORT_SYMBOL(uasm_move_labels);
601 
602 void __uasminit
603 uasm_copy_handler(struct uasm_reloc *rel, struct uasm_label *lab, u32 *first,
604  u32 *end, u32 *target)
605 {
606  long off = (long)(target - first);
607 
608  memcpy(target, first, (end - first) * sizeof(u32));
609 
610  uasm_move_relocs(rel, first, end, off);
611  uasm_move_labels(lab, first, end, off);
612 }
613 UASM_EXPORT_SYMBOL(uasm_copy_handler);
614 
615 int __uasminit uasm_insn_has_bdelay(struct uasm_reloc *rel, u32 *addr)
616 {
617  for (; rel->lab != UASM_LABEL_INVALID; rel++) {
618  if (rel->addr == addr
619  && (rel->type == R_MIPS_PC16
620  || rel->type == R_MIPS_26))
621  return 1;
622  }
623 
624  return 0;
625 }
626 UASM_EXPORT_SYMBOL(uasm_insn_has_bdelay);
627 
628 /* Convenience functions for labeled branches. */
629 void __uasminit
630 uasm_il_bltz(u32 **p, struct uasm_reloc **r, unsigned int reg, int lid)
631 {
632  uasm_r_mips_pc16(r, *p, lid);
633  uasm_i_bltz(p, reg, 0);
634 }
635 UASM_EXPORT_SYMBOL(uasm_il_bltz);
636 
637 void __uasminit
638 uasm_il_b(u32 **p, struct uasm_reloc **r, int lid)
639 {
640  uasm_r_mips_pc16(r, *p, lid);
641  uasm_i_b(p, 0);
642 }
643 UASM_EXPORT_SYMBOL(uasm_il_b);
644 
645 void __uasminit
646 uasm_il_beqz(u32 **p, struct uasm_reloc **r, unsigned int reg, int lid)
647 {
648  uasm_r_mips_pc16(r, *p, lid);
649  uasm_i_beqz(p, reg, 0);
650 }
651 UASM_EXPORT_SYMBOL(uasm_il_beqz);
652 
653 void __uasminit
654 uasm_il_beqzl(u32 **p, struct uasm_reloc **r, unsigned int reg, int lid)
655 {
656  uasm_r_mips_pc16(r, *p, lid);
657  uasm_i_beqzl(p, reg, 0);
658 }
659 UASM_EXPORT_SYMBOL(uasm_il_beqzl);
660 
661 void __uasminit
662 uasm_il_bne(u32 **p, struct uasm_reloc **r, unsigned int reg1,
663  unsigned int reg2, int lid)
664 {
665  uasm_r_mips_pc16(r, *p, lid);
666  uasm_i_bne(p, reg1, reg2, 0);
667 }
668 UASM_EXPORT_SYMBOL(uasm_il_bne);
669 
670 void __uasminit
671 uasm_il_bnez(u32 **p, struct uasm_reloc **r, unsigned int reg, int lid)
672 {
673  uasm_r_mips_pc16(r, *p, lid);
674  uasm_i_bnez(p, reg, 0);
675 }
676 UASM_EXPORT_SYMBOL(uasm_il_bnez);
677 
678 void __uasminit
679 uasm_il_bgezl(u32 **p, struct uasm_reloc **r, unsigned int reg, int lid)
680 {
681  uasm_r_mips_pc16(r, *p, lid);
682  uasm_i_bgezl(p, reg, 0);
683 }
684 UASM_EXPORT_SYMBOL(uasm_il_bgezl);
685 
686 void __uasminit
687 uasm_il_bgez(u32 **p, struct uasm_reloc **r, unsigned int reg, int lid)
688 {
689  uasm_r_mips_pc16(r, *p, lid);
690  uasm_i_bgez(p, reg, 0);
691 }
692 UASM_EXPORT_SYMBOL(uasm_il_bgez);
693 
694 void __uasminit
695 uasm_il_bbit0(u32 **p, struct uasm_reloc **r, unsigned int reg,
696  unsigned int bit, int lid)
697 {
698  uasm_r_mips_pc16(r, *p, lid);
699  uasm_i_bbit0(p, reg, bit, 0);
700 }
701 UASM_EXPORT_SYMBOL(uasm_il_bbit0);
702 
703 void __uasminit
704 uasm_il_bbit1(u32 **p, struct uasm_reloc **r, unsigned int reg,
705  unsigned int bit, int lid)
706 {
707  uasm_r_mips_pc16(r, *p, lid);
708  uasm_i_bbit1(p, reg, bit, 0);
709 }
710 UASM_EXPORT_SYMBOL(uasm_il_bbit1);
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