root / target-ppc / op_helper.c @ 3cc62370
History | View | Annotate | Download (10.7 kB)
1 |
/*
|
---|---|
2 |
* PPC emulation helpers for qemu.
|
3 |
*
|
4 |
* Copyright (c) 2003 Jocelyn Mayer
|
5 |
*
|
6 |
* This library is free software; you can redistribute it and/or
|
7 |
* modify it under the terms of the GNU Lesser General Public
|
8 |
* License as published by the Free Software Foundation; either
|
9 |
* version 2 of the License, or (at your option) any later version.
|
10 |
*
|
11 |
* This library is distributed in the hope that it will be useful,
|
12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
14 |
* Lesser General Public License for more details.
|
15 |
*
|
16 |
* You should have received a copy of the GNU Lesser General Public
|
17 |
* License along with this library; if not, write to the Free Software
|
18 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
19 |
*/
|
20 |
#include <math.h> |
21 |
#include "exec.h" |
22 |
|
23 |
#define MEMSUFFIX _raw
|
24 |
#include "op_helper_mem.h" |
25 |
#if !defined(CONFIG_USER_ONLY)
|
26 |
#define MEMSUFFIX _user
|
27 |
#include "op_helper_mem.h" |
28 |
#define MEMSUFFIX _kernel
|
29 |
#include "op_helper_mem.h" |
30 |
#endif
|
31 |
|
32 |
/*****************************************************************************/
|
33 |
/* Exceptions processing helpers */
|
34 |
void cpu_loop_exit(void) |
35 |
{ |
36 |
longjmp(env->jmp_env, 1);
|
37 |
} |
38 |
|
39 |
void do_raise_exception_err (uint32_t exception, int error_code) |
40 |
{ |
41 |
#if 0
|
42 |
printf("Raise exception %3x code : %d\n", exception, error_code);
|
43 |
#endif
|
44 |
switch (exception) {
|
45 |
case EXCP_EXTERNAL:
|
46 |
case EXCP_DECR:
|
47 |
printf("DECREMENTER & EXTERNAL exceptions should be hard interrupts !\n");
|
48 |
if (msr_ee == 0) |
49 |
return;
|
50 |
break;
|
51 |
case EXCP_PROGRAM:
|
52 |
if (error_code == EXCP_FP && msr_fe0 == 0 && msr_fe1 == 0) |
53 |
return;
|
54 |
break;
|
55 |
default:
|
56 |
break;
|
57 |
} |
58 |
env->exception_index = exception; |
59 |
env->error_code = error_code; |
60 |
cpu_loop_exit(); |
61 |
} |
62 |
|
63 |
void do_raise_exception (uint32_t exception)
|
64 |
{ |
65 |
do_raise_exception_err(exception, 0);
|
66 |
} |
67 |
|
68 |
/*****************************************************************************/
|
69 |
/* Helpers for "fat" micro operations */
|
70 |
/* Special registers load and store */
|
71 |
void do_load_cr (void) |
72 |
{ |
73 |
T0 = (env->crf[0] << 28) | |
74 |
(env->crf[1] << 24) | |
75 |
(env->crf[2] << 20) | |
76 |
(env->crf[3] << 16) | |
77 |
(env->crf[4] << 12) | |
78 |
(env->crf[5] << 8) | |
79 |
(env->crf[6] << 4) | |
80 |
(env->crf[7] << 0); |
81 |
} |
82 |
|
83 |
void do_store_cr (uint32_t mask)
|
84 |
{ |
85 |
int i, sh;
|
86 |
|
87 |
for (i = 0, sh = 7; i < 8; i++, sh --) { |
88 |
if (mask & (1 << sh)) |
89 |
env->crf[i] = (T0 >> (sh * 4)) & 0xF; |
90 |
} |
91 |
} |
92 |
|
93 |
void do_load_xer (void) |
94 |
{ |
95 |
T0 = (xer_so << XER_SO) | |
96 |
(xer_ov << XER_OV) | |
97 |
(xer_ca << XER_CA) | |
98 |
(xer_bc << XER_BC); |
99 |
} |
100 |
|
101 |
void do_store_xer (void) |
102 |
{ |
103 |
xer_so = (T0 >> XER_SO) & 0x01;
|
104 |
xer_ov = (T0 >> XER_OV) & 0x01;
|
105 |
xer_ca = (T0 >> XER_CA) & 0x01;
|
106 |
xer_bc = (T0 >> XER_BC) & 0x1f;
|
107 |
} |
108 |
|
109 |
void do_load_msr (void) |
110 |
{ |
111 |
T0 = (msr_pow << MSR_POW) | |
112 |
(msr_ile << MSR_ILE) | |
113 |
(msr_ee << MSR_EE) | |
114 |
(msr_pr << MSR_PR) | |
115 |
(msr_fp << MSR_FP) | |
116 |
(msr_me << MSR_ME) | |
117 |
(msr_fe0 << MSR_FE0) | |
118 |
(msr_se << MSR_SE) | |
119 |
(msr_be << MSR_BE) | |
120 |
(msr_fe1 << MSR_FE1) | |
121 |
(msr_ip << MSR_IP) | |
122 |
(msr_ir << MSR_IR) | |
123 |
(msr_dr << MSR_DR) | |
124 |
(msr_ri << MSR_RI) | |
125 |
(msr_le << MSR_LE); |
126 |
} |
127 |
|
128 |
void do_store_msr (void) |
129 |
{ |
130 |
#if 1 // TRY |
131 |
if (((T0 >> MSR_IR) & 0x01) != msr_ir || |
132 |
((T0 >> MSR_DR) & 0x01) != msr_dr ||
|
133 |
((T0 >> MSR_PR) & 0x01) != msr_pr)
|
134 |
{ |
135 |
do_tlbia(); |
136 |
} |
137 |
#endif
|
138 |
msr_pow = (T0 >> MSR_POW) & 0x03;
|
139 |
msr_ile = (T0 >> MSR_ILE) & 0x01;
|
140 |
msr_ee = (T0 >> MSR_EE) & 0x01;
|
141 |
msr_pr = (T0 >> MSR_PR) & 0x01;
|
142 |
msr_fp = (T0 >> MSR_FP) & 0x01;
|
143 |
msr_me = (T0 >> MSR_ME) & 0x01;
|
144 |
msr_fe0 = (T0 >> MSR_FE0) & 0x01;
|
145 |
msr_se = (T0 >> MSR_SE) & 0x01;
|
146 |
msr_be = (T0 >> MSR_BE) & 0x01;
|
147 |
msr_fe1 = (T0 >> MSR_FE1) & 0x01;
|
148 |
msr_ip = (T0 >> MSR_IP) & 0x01;
|
149 |
msr_ir = (T0 >> MSR_IR) & 0x01;
|
150 |
msr_dr = (T0 >> MSR_DR) & 0x01;
|
151 |
msr_ri = (T0 >> MSR_RI) & 0x01;
|
152 |
msr_le = (T0 >> MSR_LE) & 0x01;
|
153 |
} |
154 |
|
155 |
/* shift right arithmetic helper */
|
156 |
void do_sraw (void) |
157 |
{ |
158 |
int32_t ret; |
159 |
|
160 |
xer_ca = 0;
|
161 |
if (T1 & 0x20) { |
162 |
ret = (-1) * (T0 >> 31); |
163 |
if (ret < 0 && (T0 & ~0x80000000) != 0) |
164 |
xer_ca = 1;
|
165 |
#if 1 // TRY |
166 |
} else if (T1 == 0) { |
167 |
ret = T0; |
168 |
#endif
|
169 |
} else {
|
170 |
ret = (int32_t)T0 >> (T1 & 0x1f);
|
171 |
if (ret < 0 && ((int32_t)T0 & ((1 << T1) - 1)) != 0) |
172 |
xer_ca = 1;
|
173 |
} |
174 |
T0 = ret; |
175 |
} |
176 |
|
177 |
/* Floating point operations helpers */
|
178 |
void do_load_fpscr (void) |
179 |
{ |
180 |
/* The 32 MSB of the target fpr are undefined.
|
181 |
* They'll be zero...
|
182 |
*/
|
183 |
union {
|
184 |
double d;
|
185 |
struct {
|
186 |
uint32_t u[2];
|
187 |
} s; |
188 |
} u; |
189 |
int i;
|
190 |
|
191 |
#ifdef WORDS_BIGENDIAN
|
192 |
#define WORD0 0 |
193 |
#define WORD1 1 |
194 |
#else
|
195 |
#define WORD0 1 |
196 |
#define WORD1 0 |
197 |
#endif
|
198 |
u.s.u[WORD0] = 0;
|
199 |
u.s.u[WORD1] = 0;
|
200 |
for (i = 0; i < 8; i++) |
201 |
u.s.u[WORD1] |= env->fpscr[i] << (4 * i);
|
202 |
FT0 = u.d; |
203 |
} |
204 |
|
205 |
void do_store_fpscr (uint32_t mask)
|
206 |
{ |
207 |
/*
|
208 |
* We use only the 32 LSB of the incoming fpr
|
209 |
*/
|
210 |
union {
|
211 |
double d;
|
212 |
struct {
|
213 |
uint32_t u[2];
|
214 |
} s; |
215 |
} u; |
216 |
int i;
|
217 |
|
218 |
u.d = FT0; |
219 |
if (mask & 0x80) |
220 |
env->fpscr[0] = (env->fpscr[0] & 0x9) | ((u.s.u[WORD1] >> 28) & ~0x9); |
221 |
for (i = 1; i < 7; i++) { |
222 |
if (mask & (1 << (7 - i))) |
223 |
env->fpscr[i] = (u.s.u[WORD1] >> (4 * (7 - i))) & 0xF; |
224 |
} |
225 |
/* TODO: update FEX & VX */
|
226 |
/* Set rounding mode */
|
227 |
switch (env->fpscr[0] & 0x3) { |
228 |
case 0: |
229 |
/* Best approximation (round to nearest) */
|
230 |
fesetround(FE_TONEAREST); |
231 |
break;
|
232 |
case 1: |
233 |
/* Smaller magnitude (round toward zero) */
|
234 |
fesetround(FE_TOWARDZERO); |
235 |
break;
|
236 |
case 2: |
237 |
/* Round toward +infinite */
|
238 |
fesetround(FE_UPWARD); |
239 |
break;
|
240 |
case 3: |
241 |
/* Round toward -infinite */
|
242 |
fesetround(FE_DOWNWARD); |
243 |
break;
|
244 |
} |
245 |
} |
246 |
|
247 |
void do_fctiw (void) |
248 |
{ |
249 |
union {
|
250 |
double d;
|
251 |
uint64_t i; |
252 |
} *p = (void *)&FT1;
|
253 |
|
254 |
if (FT0 > (double)0x7FFFFFFF) |
255 |
p->i = 0x7FFFFFFFULL << 32; |
256 |
else if (FT0 < -(double)0x80000000) |
257 |
p->i = 0x80000000ULL << 32; |
258 |
else
|
259 |
p->i = 0;
|
260 |
p->i |= (uint32_t)FT0; |
261 |
FT0 = p->d; |
262 |
} |
263 |
|
264 |
void do_fctiwz (void) |
265 |
{ |
266 |
union {
|
267 |
double d;
|
268 |
uint64_t i; |
269 |
} *p = (void *)&FT1;
|
270 |
int cround = fegetround();
|
271 |
|
272 |
fesetround(FE_TOWARDZERO); |
273 |
if (FT0 > (double)0x7FFFFFFF) |
274 |
p->i = 0x7FFFFFFFULL << 32; |
275 |
else if (FT0 < -(double)0x80000000) |
276 |
p->i = 0x80000000ULL << 32; |
277 |
else
|
278 |
p->i = 0;
|
279 |
p->i |= (uint32_t)FT0; |
280 |
FT0 = p->d; |
281 |
fesetround(cround); |
282 |
} |
283 |
|
284 |
void do_fnmadd (void) |
285 |
{ |
286 |
FT0 = -((FT0 * FT1) + FT2); |
287 |
} |
288 |
|
289 |
void do_fnmsub (void) |
290 |
{ |
291 |
FT0 = -((FT0 * FT1) - FT2); |
292 |
} |
293 |
|
294 |
void do_fnmadds (void) |
295 |
{ |
296 |
FT0 = -((FTS0 * FTS1) + FTS2); |
297 |
} |
298 |
|
299 |
void do_fnmsubs (void) |
300 |
{ |
301 |
FT0 = -((FTS0 * FTS1) - FTS2); |
302 |
} |
303 |
|
304 |
void do_fsqrt (void) |
305 |
{ |
306 |
FT0 = sqrt(FT0); |
307 |
} |
308 |
|
309 |
void do_fsqrts (void) |
310 |
{ |
311 |
FT0 = (float)sqrt((float)FT0); |
312 |
} |
313 |
|
314 |
void do_fres (void) |
315 |
{ |
316 |
FT0 = 1.0 / FT0; |
317 |
} |
318 |
|
319 |
void do_fsqrte (void) |
320 |
{ |
321 |
FT0 = 1.0 / sqrt(FT0); |
322 |
} |
323 |
|
324 |
void do_fsel (void) |
325 |
{ |
326 |
if (FT0 >= 0) |
327 |
FT0 = FT2; |
328 |
else
|
329 |
FT0 = FT1; |
330 |
} |
331 |
|
332 |
void do_fcmpu (void) |
333 |
{ |
334 |
if (isnan(FT0) || isnan(FT1)) {
|
335 |
T0 = 0x01;
|
336 |
env->fpscr[4] |= 0x1; |
337 |
env->fpscr[6] |= 0x1; |
338 |
} else if (FT0 < FT1) { |
339 |
T0 = 0x08;
|
340 |
} else if (FT0 > FT1) { |
341 |
T0 = 0x04;
|
342 |
} else {
|
343 |
T0 = 0x02;
|
344 |
} |
345 |
env->fpscr[3] = T0;
|
346 |
} |
347 |
|
348 |
void do_fcmpo (void) |
349 |
{ |
350 |
env->fpscr[4] &= ~0x1; |
351 |
if (isnan(FT0) || isnan(FT1)) {
|
352 |
T0 = 0x01;
|
353 |
env->fpscr[4] |= 0x1; |
354 |
/* I don't know how to test "quiet" nan... */
|
355 |
if (0 /* || ! quiet_nan(...) */) { |
356 |
env->fpscr[6] |= 0x1; |
357 |
if (!(env->fpscr[1] & 0x8)) |
358 |
env->fpscr[4] |= 0x8; |
359 |
} else {
|
360 |
env->fpscr[4] |= 0x8; |
361 |
} |
362 |
} else if (FT0 < FT1) { |
363 |
T0 = 0x08;
|
364 |
} else if (FT0 > FT1) { |
365 |
T0 = 0x04;
|
366 |
} else {
|
367 |
T0 = 0x02;
|
368 |
} |
369 |
env->fpscr[3] = T0;
|
370 |
} |
371 |
|
372 |
void do_fabs (void) |
373 |
{ |
374 |
FT0 = fabsl(FT0); |
375 |
} |
376 |
|
377 |
void do_fnabs (void) |
378 |
{ |
379 |
FT0 = -fabsl(FT0); |
380 |
} |
381 |
|
382 |
/* Instruction cache invalidation helper */
|
383 |
#define ICACHE_LINE_SIZE 32 |
384 |
|
385 |
void do_check_reservation (void) |
386 |
{ |
387 |
if ((env->reserve & ~0x03) == T0) |
388 |
env->reserve = -1;
|
389 |
} |
390 |
|
391 |
void do_icbi (void) |
392 |
{ |
393 |
/* Invalidate one cache line */
|
394 |
T0 &= ~(ICACHE_LINE_SIZE - 1);
|
395 |
tb_invalidate_page_range(T0, T0 + ICACHE_LINE_SIZE); |
396 |
} |
397 |
|
398 |
/* TLB invalidation helpers */
|
399 |
void do_tlbia (void) |
400 |
{ |
401 |
tlb_flush(env, 1);
|
402 |
} |
403 |
|
404 |
void do_tlbie (void) |
405 |
{ |
406 |
tlb_flush_page(env, T0); |
407 |
} |
408 |
|
409 |
void do_store_sr (uint32_t srnum)
|
410 |
{ |
411 |
#if defined (DEBUG_OP)
|
412 |
dump_store_sr(srnum); |
413 |
#endif
|
414 |
#if 0 // TRY
|
415 |
{
|
416 |
uint32_t base, page;
|
417 |
|
418 |
base = srnum << 28;
|
419 |
for (page = base; page != base + 0x100000000; page += 0x1000)
|
420 |
tlb_flush_page(env, page);
|
421 |
}
|
422 |
#else
|
423 |
tlb_flush(env, 1);
|
424 |
#endif
|
425 |
env->sr[srnum] = T0; |
426 |
} |
427 |
|
428 |
/* For BATs, we may not invalidate any TLBs if the change is only on
|
429 |
* protection bits for user mode.
|
430 |
*/
|
431 |
void do_store_ibat (int ul, int nr) |
432 |
{ |
433 |
#if defined (DEBUG_OP)
|
434 |
dump_store_ibat(ul, nr); |
435 |
#endif
|
436 |
#if 0 // TRY
|
437 |
{
|
438 |
uint32_t base, length, page;
|
439 |
|
440 |
base = env->IBAT[0][nr];
|
441 |
length = (((base >> 2) & 0x000007FF) + 1) << 17;
|
442 |
base &= 0xFFFC0000;
|
443 |
for (page = base; page != base + length; page += 0x1000)
|
444 |
tlb_flush_page(env, page);
|
445 |
}
|
446 |
#else
|
447 |
tlb_flush(env, 1);
|
448 |
#endif
|
449 |
env->IBAT[ul][nr] = T0; |
450 |
} |
451 |
|
452 |
void do_store_dbat (int ul, int nr) |
453 |
{ |
454 |
#if defined (DEBUG_OP)
|
455 |
dump_store_dbat(ul, nr); |
456 |
#endif
|
457 |
#if 0 // TRY
|
458 |
{
|
459 |
uint32_t base, length, page;
|
460 |
base = env->DBAT[0][nr];
|
461 |
length = (((base >> 2) & 0x000007FF) + 1) << 17;
|
462 |
base &= 0xFFFC0000;
|
463 |
for (page = base; page != base + length; page += 0x1000)
|
464 |
tlb_flush_page(env, page);
|
465 |
}
|
466 |
#else
|
467 |
tlb_flush(env, 1);
|
468 |
#endif
|
469 |
env->DBAT[ul][nr] = T0; |
470 |
} |
471 |
|
472 |
/*****************************************************************************/
|
473 |
/* Special helpers for debug */
|
474 |
void dump_state (void) |
475 |
{ |
476 |
// cpu_dump_state(env, stdout, fprintf, 0);
|
477 |
} |
478 |
|
479 |
void dump_rfi (void) |
480 |
{ |
481 |
#if 0
|
482 |
printf("Return from interrupt => 0x%08x\n", env->nip);
|
483 |
// cpu_dump_state(env, stdout, fprintf, 0);
|
484 |
#endif
|
485 |
} |
486 |
|
487 |
void dump_store_sr (int srnum) |
488 |
{ |
489 |
#if 0
|
490 |
printf("%s: reg=%d 0x%08x\n", __func__, srnum, T0);
|
491 |
#endif
|
492 |
} |
493 |
|
494 |
static void _dump_store_bat (char ID, int ul, int nr) |
495 |
{ |
496 |
printf("Set %cBAT%d%c to 0x%08x (0x%08x)\n",
|
497 |
ID, nr, ul == 0 ? 'u' : 'l', T0, env->nip); |
498 |
} |
499 |
|
500 |
void dump_store_ibat (int ul, int nr) |
501 |
{ |
502 |
_dump_store_bat('I', ul, nr);
|
503 |
} |
504 |
|
505 |
void dump_store_dbat (int ul, int nr) |
506 |
{ |
507 |
_dump_store_bat('D', ul, nr);
|
508 |
} |
509 |
|
510 |
void dump_store_tb (int ul) |
511 |
{ |
512 |
printf("Set TB%c to 0x%08x\n", ul == 0 ? 'L' : 'U', T0); |
513 |
} |
514 |
|
515 |
void dump_update_tb(uint32_t param)
|
516 |
{ |
517 |
#if 0
|
518 |
printf("Update TB: 0x%08x + %d => 0x%08x\n", T1, param, T0);
|
519 |
#endif
|
520 |
} |
521 |
|