vmsvga: don't process more than 1024 fifo commands at once
[qemu.git] / target-sh4 / helper.c
1 /*
2 * SH4 emulation
3 *
4 * Copyright (c) 2005 Samuel Tardieu
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, see <http://www.gnu.org/licenses/>.
18 */
19 #include "qemu/osdep.h"
20
21 #include "cpu.h"
22 #include "exec/exec-all.h"
23 #include "exec/log.h"
24
25 #if !defined(CONFIG_USER_ONLY)
26 #include "hw/sh4/sh_intc.h"
27 #endif
28
29 #if defined(CONFIG_USER_ONLY)
30
31 void superh_cpu_do_interrupt(CPUState *cs)
32 {
33 cs->exception_index = -1;
34 }
35
36 int superh_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
37 int mmu_idx)
38 {
39 SuperHCPU *cpu = SUPERH_CPU(cs);
40 CPUSH4State *env = &cpu->env;
41
42 env->tea = address;
43 cs->exception_index = -1;
44 switch (rw) {
45 case 0:
46 cs->exception_index = 0x0a0;
47 break;
48 case 1:
49 cs->exception_index = 0x0c0;
50 break;
51 case 2:
52 cs->exception_index = 0x0a0;
53 break;
54 }
55 return 1;
56 }
57
58 int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr)
59 {
60 /* For user mode, only U0 area is cacheable. */
61 return !(addr & 0x80000000);
62 }
63
64 #else /* !CONFIG_USER_ONLY */
65
66 #define MMU_OK 0
67 #define MMU_ITLB_MISS (-1)
68 #define MMU_ITLB_MULTIPLE (-2)
69 #define MMU_ITLB_VIOLATION (-3)
70 #define MMU_DTLB_MISS_READ (-4)
71 #define MMU_DTLB_MISS_WRITE (-5)
72 #define MMU_DTLB_INITIAL_WRITE (-6)
73 #define MMU_DTLB_VIOLATION_READ (-7)
74 #define MMU_DTLB_VIOLATION_WRITE (-8)
75 #define MMU_DTLB_MULTIPLE (-9)
76 #define MMU_DTLB_MISS (-10)
77 #define MMU_IADDR_ERROR (-11)
78 #define MMU_DADDR_ERROR_READ (-12)
79 #define MMU_DADDR_ERROR_WRITE (-13)
80
81 void superh_cpu_do_interrupt(CPUState *cs)
82 {
83 SuperHCPU *cpu = SUPERH_CPU(cs);
84 CPUSH4State *env = &cpu->env;
85 int do_irq = cs->interrupt_request & CPU_INTERRUPT_HARD;
86 int do_exp, irq_vector = cs->exception_index;
87
88 /* prioritize exceptions over interrupts */
89
90 do_exp = cs->exception_index != -1;
91 do_irq = do_irq && (cs->exception_index == -1);
92
93 if (env->sr & (1u << SR_BL)) {
94 if (do_exp && cs->exception_index != 0x1e0) {
95 cs->exception_index = 0x000; /* masked exception -> reset */
96 }
97 if (do_irq && !env->in_sleep) {
98 return; /* masked */
99 }
100 }
101 env->in_sleep = 0;
102
103 if (do_irq) {
104 irq_vector = sh_intc_get_pending_vector(env->intc_handle,
105 (env->sr >> 4) & 0xf);
106 if (irq_vector == -1) {
107 return; /* masked */
108 }
109 }
110
111 if (qemu_loglevel_mask(CPU_LOG_INT)) {
112 const char *expname;
113 switch (cs->exception_index) {
114 case 0x0e0:
115 expname = "addr_error";
116 break;
117 case 0x040:
118 expname = "tlb_miss";
119 break;
120 case 0x0a0:
121 expname = "tlb_violation";
122 break;
123 case 0x180:
124 expname = "illegal_instruction";
125 break;
126 case 0x1a0:
127 expname = "slot_illegal_instruction";
128 break;
129 case 0x800:
130 expname = "fpu_disable";
131 break;
132 case 0x820:
133 expname = "slot_fpu";
134 break;
135 case 0x100:
136 expname = "data_write";
137 break;
138 case 0x060:
139 expname = "dtlb_miss_write";
140 break;
141 case 0x0c0:
142 expname = "dtlb_violation_write";
143 break;
144 case 0x120:
145 expname = "fpu_exception";
146 break;
147 case 0x080:
148 expname = "initial_page_write";
149 break;
150 case 0x160:
151 expname = "trapa";
152 break;
153 default:
154 expname = do_irq ? "interrupt" : "???";
155 break;
156 }
157 qemu_log("exception 0x%03x [%s] raised\n",
158 irq_vector, expname);
159 log_cpu_state(cs, 0);
160 }
161
162 env->ssr = cpu_read_sr(env);
163 env->spc = env->pc;
164 env->sgr = env->gregs[15];
165 env->sr |= (1u << SR_BL) | (1u << SR_MD) | (1u << SR_RB);
166
167 if (env->flags & (DELAY_SLOT | DELAY_SLOT_CONDITIONAL)) {
168 /* Branch instruction should be executed again before delay slot. */
169 env->spc -= 2;
170 /* Clear flags for exception/interrupt routine. */
171 env->flags &= ~(DELAY_SLOT | DELAY_SLOT_CONDITIONAL | DELAY_SLOT_TRUE);
172 }
173 if (env->flags & DELAY_SLOT_CLEARME)
174 env->flags = 0;
175
176 if (do_exp) {
177 env->expevt = cs->exception_index;
178 switch (cs->exception_index) {
179 case 0x000:
180 case 0x020:
181 case 0x140:
182 env->sr &= ~(1u << SR_FD);
183 env->sr |= 0xf << 4; /* IMASK */
184 env->pc = 0xa0000000;
185 break;
186 case 0x040:
187 case 0x060:
188 env->pc = env->vbr + 0x400;
189 break;
190 case 0x160:
191 env->spc += 2; /* special case for TRAPA */
192 /* fall through */
193 default:
194 env->pc = env->vbr + 0x100;
195 break;
196 }
197 return;
198 }
199
200 if (do_irq) {
201 env->intevt = irq_vector;
202 env->pc = env->vbr + 0x600;
203 return;
204 }
205 }
206
207 static void update_itlb_use(CPUSH4State * env, int itlbnb)
208 {
209 uint8_t or_mask = 0, and_mask = (uint8_t) - 1;
210
211 switch (itlbnb) {
212 case 0:
213 and_mask = 0x1f;
214 break;
215 case 1:
216 and_mask = 0xe7;
217 or_mask = 0x80;
218 break;
219 case 2:
220 and_mask = 0xfb;
221 or_mask = 0x50;
222 break;
223 case 3:
224 or_mask = 0x2c;
225 break;
226 }
227
228 env->mmucr &= (and_mask << 24) | 0x00ffffff;
229 env->mmucr |= (or_mask << 24);
230 }
231
232 static int itlb_replacement(CPUSH4State * env)
233 {
234 SuperHCPU *cpu = sh_env_get_cpu(env);
235
236 if ((env->mmucr & 0xe0000000) == 0xe0000000) {
237 return 0;
238 }
239 if ((env->mmucr & 0x98000000) == 0x18000000) {
240 return 1;
241 }
242 if ((env->mmucr & 0x54000000) == 0x04000000) {
243 return 2;
244 }
245 if ((env->mmucr & 0x2c000000) == 0x00000000) {
246 return 3;
247 }
248 cpu_abort(CPU(cpu), "Unhandled itlb_replacement");
249 }
250
251 /* Find the corresponding entry in the right TLB
252 Return entry, MMU_DTLB_MISS or MMU_DTLB_MULTIPLE
253 */
254 static int find_tlb_entry(CPUSH4State * env, target_ulong address,
255 tlb_t * entries, uint8_t nbtlb, int use_asid)
256 {
257 int match = MMU_DTLB_MISS;
258 uint32_t start, end;
259 uint8_t asid;
260 int i;
261
262 asid = env->pteh & 0xff;
263
264 for (i = 0; i < nbtlb; i++) {
265 if (!entries[i].v)
266 continue; /* Invalid entry */
267 if (!entries[i].sh && use_asid && entries[i].asid != asid)
268 continue; /* Bad ASID */
269 start = (entries[i].vpn << 10) & ~(entries[i].size - 1);
270 end = start + entries[i].size - 1;
271 if (address >= start && address <= end) { /* Match */
272 if (match != MMU_DTLB_MISS)
273 return MMU_DTLB_MULTIPLE; /* Multiple match */
274 match = i;
275 }
276 }
277 return match;
278 }
279
280 static void increment_urc(CPUSH4State * env)
281 {
282 uint8_t urb, urc;
283
284 /* Increment URC */
285 urb = ((env->mmucr) >> 18) & 0x3f;
286 urc = ((env->mmucr) >> 10) & 0x3f;
287 urc++;
288 if ((urb > 0 && urc > urb) || urc > (UTLB_SIZE - 1))
289 urc = 0;
290 env->mmucr = (env->mmucr & 0xffff03ff) | (urc << 10);
291 }
292
293 /* Copy and utlb entry into itlb
294 Return entry
295 */
296 static int copy_utlb_entry_itlb(CPUSH4State *env, int utlb)
297 {
298 int itlb;
299
300 tlb_t * ientry;
301 itlb = itlb_replacement(env);
302 ientry = &env->itlb[itlb];
303 if (ientry->v) {
304 tlb_flush_page(CPU(sh_env_get_cpu(env)), ientry->vpn << 10);
305 }
306 *ientry = env->utlb[utlb];
307 update_itlb_use(env, itlb);
308 return itlb;
309 }
310
311 /* Find itlb entry
312 Return entry, MMU_ITLB_MISS, MMU_ITLB_MULTIPLE or MMU_DTLB_MULTIPLE
313 */
314 static int find_itlb_entry(CPUSH4State * env, target_ulong address,
315 int use_asid)
316 {
317 int e;
318
319 e = find_tlb_entry(env, address, env->itlb, ITLB_SIZE, use_asid);
320 if (e == MMU_DTLB_MULTIPLE) {
321 e = MMU_ITLB_MULTIPLE;
322 } else if (e == MMU_DTLB_MISS) {
323 e = MMU_ITLB_MISS;
324 } else if (e >= 0) {
325 update_itlb_use(env, e);
326 }
327 return e;
328 }
329
330 /* Find utlb entry
331 Return entry, MMU_DTLB_MISS, MMU_DTLB_MULTIPLE */
332 static int find_utlb_entry(CPUSH4State * env, target_ulong address, int use_asid)
333 {
334 /* per utlb access */
335 increment_urc(env);
336
337 /* Return entry */
338 return find_tlb_entry(env, address, env->utlb, UTLB_SIZE, use_asid);
339 }
340
341 /* Match address against MMU
342 Return MMU_OK, MMU_DTLB_MISS_READ, MMU_DTLB_MISS_WRITE,
343 MMU_DTLB_INITIAL_WRITE, MMU_DTLB_VIOLATION_READ,
344 MMU_DTLB_VIOLATION_WRITE, MMU_ITLB_MISS,
345 MMU_ITLB_MULTIPLE, MMU_ITLB_VIOLATION,
346 MMU_IADDR_ERROR, MMU_DADDR_ERROR_READ, MMU_DADDR_ERROR_WRITE.
347 */
348 static int get_mmu_address(CPUSH4State * env, target_ulong * physical,
349 int *prot, target_ulong address,
350 int rw, int access_type)
351 {
352 int use_asid, n;
353 tlb_t *matching = NULL;
354
355 use_asid = !(env->mmucr & MMUCR_SV) || !(env->sr & (1u << SR_MD));
356
357 if (rw == 2) {
358 n = find_itlb_entry(env, address, use_asid);
359 if (n >= 0) {
360 matching = &env->itlb[n];
361 if (!(env->sr & (1u << SR_MD)) && !(matching->pr & 2)) {
362 n = MMU_ITLB_VIOLATION;
363 } else {
364 *prot = PAGE_EXEC;
365 }
366 } else {
367 n = find_utlb_entry(env, address, use_asid);
368 if (n >= 0) {
369 n = copy_utlb_entry_itlb(env, n);
370 matching = &env->itlb[n];
371 if (!(env->sr & (1u << SR_MD)) && !(matching->pr & 2)) {
372 n = MMU_ITLB_VIOLATION;
373 } else {
374 *prot = PAGE_READ | PAGE_EXEC;
375 if ((matching->pr & 1) && matching->d) {
376 *prot |= PAGE_WRITE;
377 }
378 }
379 } else if (n == MMU_DTLB_MULTIPLE) {
380 n = MMU_ITLB_MULTIPLE;
381 } else if (n == MMU_DTLB_MISS) {
382 n = MMU_ITLB_MISS;
383 }
384 }
385 } else {
386 n = find_utlb_entry(env, address, use_asid);
387 if (n >= 0) {
388 matching = &env->utlb[n];
389 if (!(env->sr & (1u << SR_MD)) && !(matching->pr & 2)) {
390 n = (rw == 1) ? MMU_DTLB_VIOLATION_WRITE :
391 MMU_DTLB_VIOLATION_READ;
392 } else if ((rw == 1) && !(matching->pr & 1)) {
393 n = MMU_DTLB_VIOLATION_WRITE;
394 } else if ((rw == 1) && !matching->d) {
395 n = MMU_DTLB_INITIAL_WRITE;
396 } else {
397 *prot = PAGE_READ;
398 if ((matching->pr & 1) && matching->d) {
399 *prot |= PAGE_WRITE;
400 }
401 }
402 } else if (n == MMU_DTLB_MISS) {
403 n = (rw == 1) ? MMU_DTLB_MISS_WRITE :
404 MMU_DTLB_MISS_READ;
405 }
406 }
407 if (n >= 0) {
408 n = MMU_OK;
409 *physical = ((matching->ppn << 10) & ~(matching->size - 1)) |
410 (address & (matching->size - 1));
411 }
412 return n;
413 }
414
415 static int get_physical_address(CPUSH4State * env, target_ulong * physical,
416 int *prot, target_ulong address,
417 int rw, int access_type)
418 {
419 /* P1, P2 and P4 areas do not use translation */
420 if ((address >= 0x80000000 && address < 0xc0000000) ||
421 address >= 0xe0000000) {
422 if (!(env->sr & (1u << SR_MD))
423 && (address < 0xe0000000 || address >= 0xe4000000)) {
424 /* Unauthorized access in user mode (only store queues are available) */
425 fprintf(stderr, "Unauthorized access\n");
426 if (rw == 0)
427 return MMU_DADDR_ERROR_READ;
428 else if (rw == 1)
429 return MMU_DADDR_ERROR_WRITE;
430 else
431 return MMU_IADDR_ERROR;
432 }
433 if (address >= 0x80000000 && address < 0xc0000000) {
434 /* Mask upper 3 bits for P1 and P2 areas */
435 *physical = address & 0x1fffffff;
436 } else {
437 *physical = address;
438 }
439 *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
440 return MMU_OK;
441 }
442
443 /* If MMU is disabled, return the corresponding physical page */
444 if (!(env->mmucr & MMUCR_AT)) {
445 *physical = address & 0x1FFFFFFF;
446 *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
447 return MMU_OK;
448 }
449
450 /* We need to resort to the MMU */
451 return get_mmu_address(env, physical, prot, address, rw, access_type);
452 }
453
454 int superh_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
455 int mmu_idx)
456 {
457 SuperHCPU *cpu = SUPERH_CPU(cs);
458 CPUSH4State *env = &cpu->env;
459 target_ulong physical;
460 int prot, ret, access_type;
461
462 access_type = ACCESS_INT;
463 ret =
464 get_physical_address(env, &physical, &prot, address, rw,
465 access_type);
466
467 if (ret != MMU_OK) {
468 env->tea = address;
469 if (ret != MMU_DTLB_MULTIPLE && ret != MMU_ITLB_MULTIPLE) {
470 env->pteh = (env->pteh & PTEH_ASID_MASK) |
471 (address & PTEH_VPN_MASK);
472 }
473 switch (ret) {
474 case MMU_ITLB_MISS:
475 case MMU_DTLB_MISS_READ:
476 cs->exception_index = 0x040;
477 break;
478 case MMU_DTLB_MULTIPLE:
479 case MMU_ITLB_MULTIPLE:
480 cs->exception_index = 0x140;
481 break;
482 case MMU_ITLB_VIOLATION:
483 cs->exception_index = 0x0a0;
484 break;
485 case MMU_DTLB_MISS_WRITE:
486 cs->exception_index = 0x060;
487 break;
488 case MMU_DTLB_INITIAL_WRITE:
489 cs->exception_index = 0x080;
490 break;
491 case MMU_DTLB_VIOLATION_READ:
492 cs->exception_index = 0x0a0;
493 break;
494 case MMU_DTLB_VIOLATION_WRITE:
495 cs->exception_index = 0x0c0;
496 break;
497 case MMU_IADDR_ERROR:
498 case MMU_DADDR_ERROR_READ:
499 cs->exception_index = 0x0e0;
500 break;
501 case MMU_DADDR_ERROR_WRITE:
502 cs->exception_index = 0x100;
503 break;
504 default:
505 cpu_abort(cs, "Unhandled MMU fault");
506 }
507 return 1;
508 }
509
510 address &= TARGET_PAGE_MASK;
511 physical &= TARGET_PAGE_MASK;
512
513 tlb_set_page(cs, address, physical, prot, mmu_idx, TARGET_PAGE_SIZE);
514 return 0;
515 }
516
517 hwaddr superh_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
518 {
519 SuperHCPU *cpu = SUPERH_CPU(cs);
520 target_ulong physical;
521 int prot;
522
523 get_physical_address(&cpu->env, &physical, &prot, addr, 0, 0);
524 return physical;
525 }
526
527 void cpu_load_tlb(CPUSH4State * env)
528 {
529 SuperHCPU *cpu = sh_env_get_cpu(env);
530 int n = cpu_mmucr_urc(env->mmucr);
531 tlb_t * entry = &env->utlb[n];
532
533 if (entry->v) {
534 /* Overwriting valid entry in utlb. */
535 target_ulong address = entry->vpn << 10;
536 tlb_flush_page(CPU(cpu), address);
537 }
538
539 /* Take values into cpu status from registers. */
540 entry->asid = (uint8_t)cpu_pteh_asid(env->pteh);
541 entry->vpn = cpu_pteh_vpn(env->pteh);
542 entry->v = (uint8_t)cpu_ptel_v(env->ptel);
543 entry->ppn = cpu_ptel_ppn(env->ptel);
544 entry->sz = (uint8_t)cpu_ptel_sz(env->ptel);
545 switch (entry->sz) {
546 case 0: /* 00 */
547 entry->size = 1024; /* 1K */
548 break;
549 case 1: /* 01 */
550 entry->size = 1024 * 4; /* 4K */
551 break;
552 case 2: /* 10 */
553 entry->size = 1024 * 64; /* 64K */
554 break;
555 case 3: /* 11 */
556 entry->size = 1024 * 1024; /* 1M */
557 break;
558 default:
559 cpu_abort(CPU(cpu), "Unhandled load_tlb");
560 break;
561 }
562 entry->sh = (uint8_t)cpu_ptel_sh(env->ptel);
563 entry->c = (uint8_t)cpu_ptel_c(env->ptel);
564 entry->pr = (uint8_t)cpu_ptel_pr(env->ptel);
565 entry->d = (uint8_t)cpu_ptel_d(env->ptel);
566 entry->wt = (uint8_t)cpu_ptel_wt(env->ptel);
567 entry->sa = (uint8_t)cpu_ptea_sa(env->ptea);
568 entry->tc = (uint8_t)cpu_ptea_tc(env->ptea);
569 }
570
571 void cpu_sh4_invalidate_tlb(CPUSH4State *s)
572 {
573 int i;
574
575 /* UTLB */
576 for (i = 0; i < UTLB_SIZE; i++) {
577 tlb_t * entry = &s->utlb[i];
578 entry->v = 0;
579 }
580 /* ITLB */
581 for (i = 0; i < ITLB_SIZE; i++) {
582 tlb_t * entry = &s->itlb[i];
583 entry->v = 0;
584 }
585
586 tlb_flush(CPU(sh_env_get_cpu(s)), 1);
587 }
588
589 uint32_t cpu_sh4_read_mmaped_itlb_addr(CPUSH4State *s,
590 hwaddr addr)
591 {
592 int index = (addr & 0x00000300) >> 8;
593 tlb_t * entry = &s->itlb[index];
594
595 return (entry->vpn << 10) |
596 (entry->v << 8) |
597 (entry->asid);
598 }
599
600 void cpu_sh4_write_mmaped_itlb_addr(CPUSH4State *s, hwaddr addr,
601 uint32_t mem_value)
602 {
603 uint32_t vpn = (mem_value & 0xfffffc00) >> 10;
604 uint8_t v = (uint8_t)((mem_value & 0x00000100) >> 8);
605 uint8_t asid = (uint8_t)(mem_value & 0x000000ff);
606
607 int index = (addr & 0x00000300) >> 8;
608 tlb_t * entry = &s->itlb[index];
609 if (entry->v) {
610 /* Overwriting valid entry in itlb. */
611 target_ulong address = entry->vpn << 10;
612 tlb_flush_page(CPU(sh_env_get_cpu(s)), address);
613 }
614 entry->asid = asid;
615 entry->vpn = vpn;
616 entry->v = v;
617 }
618
619 uint32_t cpu_sh4_read_mmaped_itlb_data(CPUSH4State *s,
620 hwaddr addr)
621 {
622 int array = (addr & 0x00800000) >> 23;
623 int index = (addr & 0x00000300) >> 8;
624 tlb_t * entry = &s->itlb[index];
625
626 if (array == 0) {
627 /* ITLB Data Array 1 */
628 return (entry->ppn << 10) |
629 (entry->v << 8) |
630 (entry->pr << 5) |
631 ((entry->sz & 1) << 6) |
632 ((entry->sz & 2) << 4) |
633 (entry->c << 3) |
634 (entry->sh << 1);
635 } else {
636 /* ITLB Data Array 2 */
637 return (entry->tc << 1) |
638 (entry->sa);
639 }
640 }
641
642 void cpu_sh4_write_mmaped_itlb_data(CPUSH4State *s, hwaddr addr,
643 uint32_t mem_value)
644 {
645 int array = (addr & 0x00800000) >> 23;
646 int index = (addr & 0x00000300) >> 8;
647 tlb_t * entry = &s->itlb[index];
648
649 if (array == 0) {
650 /* ITLB Data Array 1 */
651 if (entry->v) {
652 /* Overwriting valid entry in utlb. */
653 target_ulong address = entry->vpn << 10;
654 tlb_flush_page(CPU(sh_env_get_cpu(s)), address);
655 }
656 entry->ppn = (mem_value & 0x1ffffc00) >> 10;
657 entry->v = (mem_value & 0x00000100) >> 8;
658 entry->sz = (mem_value & 0x00000080) >> 6 |
659 (mem_value & 0x00000010) >> 4;
660 entry->pr = (mem_value & 0x00000040) >> 5;
661 entry->c = (mem_value & 0x00000008) >> 3;
662 entry->sh = (mem_value & 0x00000002) >> 1;
663 } else {
664 /* ITLB Data Array 2 */
665 entry->tc = (mem_value & 0x00000008) >> 3;
666 entry->sa = (mem_value & 0x00000007);
667 }
668 }
669
670 uint32_t cpu_sh4_read_mmaped_utlb_addr(CPUSH4State *s,
671 hwaddr addr)
672 {
673 int index = (addr & 0x00003f00) >> 8;
674 tlb_t * entry = &s->utlb[index];
675
676 increment_urc(s); /* per utlb access */
677
678 return (entry->vpn << 10) |
679 (entry->v << 8) |
680 (entry->asid);
681 }
682
683 void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, hwaddr addr,
684 uint32_t mem_value)
685 {
686 int associate = addr & 0x0000080;
687 uint32_t vpn = (mem_value & 0xfffffc00) >> 10;
688 uint8_t d = (uint8_t)((mem_value & 0x00000200) >> 9);
689 uint8_t v = (uint8_t)((mem_value & 0x00000100) >> 8);
690 uint8_t asid = (uint8_t)(mem_value & 0x000000ff);
691 int use_asid = !(s->mmucr & MMUCR_SV) || !(s->sr & (1u << SR_MD));
692
693 if (associate) {
694 int i;
695 tlb_t * utlb_match_entry = NULL;
696 int needs_tlb_flush = 0;
697
698 /* search UTLB */
699 for (i = 0; i < UTLB_SIZE; i++) {
700 tlb_t * entry = &s->utlb[i];
701 if (!entry->v)
702 continue;
703
704 if (entry->vpn == vpn
705 && (!use_asid || entry->asid == asid || entry->sh)) {
706 if (utlb_match_entry) {
707 CPUState *cs = CPU(sh_env_get_cpu(s));
708
709 /* Multiple TLB Exception */
710 cs->exception_index = 0x140;
711 s->tea = addr;
712 break;
713 }
714 if (entry->v && !v)
715 needs_tlb_flush = 1;
716 entry->v = v;
717 entry->d = d;
718 utlb_match_entry = entry;
719 }
720 increment_urc(s); /* per utlb access */
721 }
722
723 /* search ITLB */
724 for (i = 0; i < ITLB_SIZE; i++) {
725 tlb_t * entry = &s->itlb[i];
726 if (entry->vpn == vpn
727 && (!use_asid || entry->asid == asid || entry->sh)) {
728 if (entry->v && !v)
729 needs_tlb_flush = 1;
730 if (utlb_match_entry)
731 *entry = *utlb_match_entry;
732 else
733 entry->v = v;
734 break;
735 }
736 }
737
738 if (needs_tlb_flush) {
739 tlb_flush_page(CPU(sh_env_get_cpu(s)), vpn << 10);
740 }
741
742 } else {
743 int index = (addr & 0x00003f00) >> 8;
744 tlb_t * entry = &s->utlb[index];
745 if (entry->v) {
746 CPUState *cs = CPU(sh_env_get_cpu(s));
747
748 /* Overwriting valid entry in utlb. */
749 target_ulong address = entry->vpn << 10;
750 tlb_flush_page(cs, address);
751 }
752 entry->asid = asid;
753 entry->vpn = vpn;
754 entry->d = d;
755 entry->v = v;
756 increment_urc(s);
757 }
758 }
759
760 uint32_t cpu_sh4_read_mmaped_utlb_data(CPUSH4State *s,
761 hwaddr addr)
762 {
763 int array = (addr & 0x00800000) >> 23;
764 int index = (addr & 0x00003f00) >> 8;
765 tlb_t * entry = &s->utlb[index];
766
767 increment_urc(s); /* per utlb access */
768
769 if (array == 0) {
770 /* ITLB Data Array 1 */
771 return (entry->ppn << 10) |
772 (entry->v << 8) |
773 (entry->pr << 5) |
774 ((entry->sz & 1) << 6) |
775 ((entry->sz & 2) << 4) |
776 (entry->c << 3) |
777 (entry->d << 2) |
778 (entry->sh << 1) |
779 (entry->wt);
780 } else {
781 /* ITLB Data Array 2 */
782 return (entry->tc << 1) |
783 (entry->sa);
784 }
785 }
786
787 void cpu_sh4_write_mmaped_utlb_data(CPUSH4State *s, hwaddr addr,
788 uint32_t mem_value)
789 {
790 int array = (addr & 0x00800000) >> 23;
791 int index = (addr & 0x00003f00) >> 8;
792 tlb_t * entry = &s->utlb[index];
793
794 increment_urc(s); /* per utlb access */
795
796 if (array == 0) {
797 /* UTLB Data Array 1 */
798 if (entry->v) {
799 /* Overwriting valid entry in utlb. */
800 target_ulong address = entry->vpn << 10;
801 tlb_flush_page(CPU(sh_env_get_cpu(s)), address);
802 }
803 entry->ppn = (mem_value & 0x1ffffc00) >> 10;
804 entry->v = (mem_value & 0x00000100) >> 8;
805 entry->sz = (mem_value & 0x00000080) >> 6 |
806 (mem_value & 0x00000010) >> 4;
807 entry->pr = (mem_value & 0x00000060) >> 5;
808 entry->c = (mem_value & 0x00000008) >> 3;
809 entry->d = (mem_value & 0x00000004) >> 2;
810 entry->sh = (mem_value & 0x00000002) >> 1;
811 entry->wt = (mem_value & 0x00000001);
812 } else {
813 /* UTLB Data Array 2 */
814 entry->tc = (mem_value & 0x00000008) >> 3;
815 entry->sa = (mem_value & 0x00000007);
816 }
817 }
818
819 int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr)
820 {
821 int n;
822 int use_asid = !(env->mmucr & MMUCR_SV) || !(env->sr & (1u << SR_MD));
823
824 /* check area */
825 if (env->sr & (1u << SR_MD)) {
826 /* For privileged mode, P2 and P4 area is not cacheable. */
827 if ((0xA0000000 <= addr && addr < 0xC0000000) || 0xE0000000 <= addr)
828 return 0;
829 } else {
830 /* For user mode, only U0 area is cacheable. */
831 if (0x80000000 <= addr)
832 return 0;
833 }
834
835 /*
836 * TODO : Evaluate CCR and check if the cache is on or off.
837 * Now CCR is not in CPUSH4State, but in SH7750State.
838 * When you move the ccr into CPUSH4State, the code will be
839 * as follows.
840 */
841 #if 0
842 /* check if operand cache is enabled or not. */
843 if (!(env->ccr & 1))
844 return 0;
845 #endif
846
847 /* if MMU is off, no check for TLB. */
848 if (env->mmucr & MMUCR_AT)
849 return 1;
850
851 /* check TLB */
852 n = find_tlb_entry(env, addr, env->itlb, ITLB_SIZE, use_asid);
853 if (n >= 0)
854 return env->itlb[n].c;
855
856 n = find_tlb_entry(env, addr, env->utlb, UTLB_SIZE, use_asid);
857 if (n >= 0)
858 return env->utlb[n].c;
859
860 return 0;
861 }
862
863 #endif
864
865 bool superh_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
866 {
867 if (interrupt_request & CPU_INTERRUPT_HARD) {
868 superh_cpu_do_interrupt(cs);
869 return true;
870 }
871 return false;
872 }