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1.1 root 1: /*
2: * Alpha emulation cpu helpers for qemu.
3: *
4: * Copyright (c) 2007 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
1.1.1.3 root 17: * License along with this library; if not, see <http://www.gnu.org/licenses/>.
1.1 root 18: */
19:
20: #include <stdint.h>
21: #include <stdlib.h>
22: #include <stdio.h>
23:
24: #include "cpu.h"
25: #include "exec-all.h"
1.1.1.4 ! root 26: #include "softfloat.h"
! 27:
! 28: uint64_t cpu_alpha_load_fpcr (CPUState *env)
! 29: {
! 30: uint64_t r = 0;
! 31: uint8_t t;
! 32:
! 33: t = env->fpcr_exc_status;
! 34: if (t) {
! 35: r = FPCR_SUM;
! 36: if (t & float_flag_invalid) {
! 37: r |= FPCR_INV;
! 38: }
! 39: if (t & float_flag_divbyzero) {
! 40: r |= FPCR_DZE;
! 41: }
! 42: if (t & float_flag_overflow) {
! 43: r |= FPCR_OVF;
! 44: }
! 45: if (t & float_flag_underflow) {
! 46: r |= FPCR_UNF;
! 47: }
! 48: if (t & float_flag_inexact) {
! 49: r |= FPCR_INE;
! 50: }
! 51: }
! 52:
! 53: t = env->fpcr_exc_mask;
! 54: if (t & float_flag_invalid) {
! 55: r |= FPCR_INVD;
! 56: }
! 57: if (t & float_flag_divbyzero) {
! 58: r |= FPCR_DZED;
! 59: }
! 60: if (t & float_flag_overflow) {
! 61: r |= FPCR_OVFD;
! 62: }
! 63: if (t & float_flag_underflow) {
! 64: r |= FPCR_UNFD;
! 65: }
! 66: if (t & float_flag_inexact) {
! 67: r |= FPCR_INED;
! 68: }
! 69:
! 70: switch (env->fpcr_dyn_round) {
! 71: case float_round_nearest_even:
! 72: r |= FPCR_DYN_NORMAL;
! 73: break;
! 74: case float_round_down:
! 75: r |= FPCR_DYN_MINUS;
! 76: break;
! 77: case float_round_up:
! 78: r |= FPCR_DYN_PLUS;
! 79: break;
! 80: case float_round_to_zero:
! 81: r |= FPCR_DYN_CHOPPED;
! 82: break;
! 83: }
! 84:
! 85: if (env->fpcr_dnz) {
! 86: r |= FPCR_DNZ;
! 87: }
! 88: if (env->fpcr_dnod) {
! 89: r |= FPCR_DNOD;
! 90: }
! 91: if (env->fpcr_undz) {
! 92: r |= FPCR_UNDZ;
! 93: }
! 94:
! 95: return r;
! 96: }
! 97:
! 98: void cpu_alpha_store_fpcr (CPUState *env, uint64_t val)
! 99: {
! 100: uint8_t t;
! 101:
! 102: t = 0;
! 103: if (val & FPCR_INV) {
! 104: t |= float_flag_invalid;
! 105: }
! 106: if (val & FPCR_DZE) {
! 107: t |= float_flag_divbyzero;
! 108: }
! 109: if (val & FPCR_OVF) {
! 110: t |= float_flag_overflow;
! 111: }
! 112: if (val & FPCR_UNF) {
! 113: t |= float_flag_underflow;
! 114: }
! 115: if (val & FPCR_INE) {
! 116: t |= float_flag_inexact;
! 117: }
! 118: env->fpcr_exc_status = t;
! 119:
! 120: t = 0;
! 121: if (val & FPCR_INVD) {
! 122: t |= float_flag_invalid;
! 123: }
! 124: if (val & FPCR_DZED) {
! 125: t |= float_flag_divbyzero;
! 126: }
! 127: if (val & FPCR_OVFD) {
! 128: t |= float_flag_overflow;
! 129: }
! 130: if (val & FPCR_UNFD) {
! 131: t |= float_flag_underflow;
! 132: }
! 133: if (val & FPCR_INED) {
! 134: t |= float_flag_inexact;
! 135: }
! 136: env->fpcr_exc_mask = t;
! 137:
! 138: switch (val & FPCR_DYN_MASK) {
! 139: case FPCR_DYN_CHOPPED:
! 140: t = float_round_to_zero;
! 141: break;
! 142: case FPCR_DYN_MINUS:
! 143: t = float_round_down;
! 144: break;
! 145: case FPCR_DYN_NORMAL:
! 146: t = float_round_nearest_even;
! 147: break;
! 148: case FPCR_DYN_PLUS:
! 149: t = float_round_up;
! 150: break;
! 151: }
! 152: env->fpcr_dyn_round = t;
! 153:
! 154: env->fpcr_flush_to_zero
! 155: = (val & (FPCR_UNDZ|FPCR_UNFD)) == (FPCR_UNDZ|FPCR_UNFD);
! 156:
! 157: env->fpcr_dnz = (val & FPCR_DNZ) != 0;
! 158: env->fpcr_dnod = (val & FPCR_DNOD) != 0;
! 159: env->fpcr_undz = (val & FPCR_UNDZ) != 0;
! 160: }
1.1 root 161:
162: #if defined(CONFIG_USER_ONLY)
163:
164: int cpu_alpha_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
165: int mmu_idx, int is_softmmu)
166: {
167: if (rw == 2)
168: env->exception_index = EXCP_ITB_MISS;
169: else
170: env->exception_index = EXCP_DFAULT;
171: env->ipr[IPR_EXC_ADDR] = address;
172:
173: return 1;
174: }
175:
176: void do_interrupt (CPUState *env)
177: {
178: env->exception_index = -1;
179: }
180:
181: #else
182:
183: target_phys_addr_t cpu_get_phys_page_debug (CPUState *env, target_ulong addr)
184: {
185: return -1;
186: }
187:
188: int cpu_alpha_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
189: int mmu_idx, int is_softmmu)
190: {
191: uint32_t opc;
192:
193: if (rw == 2) {
194: /* Instruction translation buffer miss */
195: env->exception_index = EXCP_ITB_MISS;
196: } else {
197: if (env->ipr[IPR_EXC_ADDR] & 1)
198: env->exception_index = EXCP_DTB_MISS_PAL;
199: else
200: env->exception_index = EXCP_DTB_MISS_NATIVE;
201: opc = (ldl_code(env->pc) >> 21) << 4;
202: if (rw) {
203: opc |= 0x9;
204: } else {
205: opc |= 0x4;
206: }
207: env->ipr[IPR_MM_STAT] = opc;
208: }
209:
210: return 1;
211: }
212:
213: int cpu_alpha_mfpr (CPUState *env, int iprn, uint64_t *valp)
214: {
215: uint64_t hwpcb;
216: int ret = 0;
217:
218: hwpcb = env->ipr[IPR_PCBB];
219: switch (iprn) {
220: case IPR_ASN:
221: if (env->features & FEATURE_ASN)
222: *valp = env->ipr[IPR_ASN];
223: else
224: *valp = 0;
225: break;
226: case IPR_ASTEN:
227: *valp = ((int64_t)(env->ipr[IPR_ASTEN] << 60)) >> 60;
228: break;
229: case IPR_ASTSR:
230: *valp = ((int64_t)(env->ipr[IPR_ASTSR] << 60)) >> 60;
231: break;
232: case IPR_DATFX:
233: /* Write only */
234: ret = -1;
235: break;
236: case IPR_ESP:
237: if (env->features & FEATURE_SPS)
238: *valp = env->ipr[IPR_ESP];
239: else
240: *valp = ldq_raw(hwpcb + 8);
241: break;
242: case IPR_FEN:
243: *valp = ((int64_t)(env->ipr[IPR_FEN] << 63)) >> 63;
244: break;
245: case IPR_IPIR:
246: /* Write-only */
247: ret = -1;
248: break;
249: case IPR_IPL:
250: *valp = ((int64_t)(env->ipr[IPR_IPL] << 59)) >> 59;
251: break;
252: case IPR_KSP:
253: if (!(env->ipr[IPR_EXC_ADDR] & 1)) {
254: ret = -1;
255: } else {
256: if (env->features & FEATURE_SPS)
257: *valp = env->ipr[IPR_KSP];
258: else
259: *valp = ldq_raw(hwpcb + 0);
260: }
261: break;
262: case IPR_MCES:
263: *valp = ((int64_t)(env->ipr[IPR_MCES] << 59)) >> 59;
264: break;
265: case IPR_PERFMON:
266: /* Implementation specific */
267: *valp = 0;
268: break;
269: case IPR_PCBB:
270: *valp = ((int64_t)env->ipr[IPR_PCBB] << 16) >> 16;
271: break;
272: case IPR_PRBR:
273: *valp = env->ipr[IPR_PRBR];
274: break;
275: case IPR_PTBR:
276: *valp = env->ipr[IPR_PTBR];
277: break;
278: case IPR_SCBB:
279: *valp = (int64_t)((int32_t)env->ipr[IPR_SCBB]);
280: break;
281: case IPR_SIRR:
282: /* Write-only */
283: ret = -1;
284: break;
285: case IPR_SISR:
286: *valp = (int64_t)((int16_t)env->ipr[IPR_SISR]);
287: case IPR_SSP:
288: if (env->features & FEATURE_SPS)
289: *valp = env->ipr[IPR_SSP];
290: else
291: *valp = ldq_raw(hwpcb + 16);
292: break;
293: case IPR_SYSPTBR:
294: if (env->features & FEATURE_VIRBND)
295: *valp = env->ipr[IPR_SYSPTBR];
296: else
297: ret = -1;
298: break;
299: case IPR_TBCHK:
300: if ((env->features & FEATURE_TBCHK)) {
301: /* XXX: TODO */
302: *valp = 0;
303: ret = -1;
304: } else {
305: ret = -1;
306: }
307: break;
308: case IPR_TBIA:
309: /* Write-only */
310: ret = -1;
311: break;
312: case IPR_TBIAP:
313: /* Write-only */
314: ret = -1;
315: break;
316: case IPR_TBIS:
317: /* Write-only */
318: ret = -1;
319: break;
320: case IPR_TBISD:
321: /* Write-only */
322: ret = -1;
323: break;
324: case IPR_TBISI:
325: /* Write-only */
326: ret = -1;
327: break;
328: case IPR_USP:
329: if (env->features & FEATURE_SPS)
330: *valp = env->ipr[IPR_USP];
331: else
332: *valp = ldq_raw(hwpcb + 24);
333: break;
334: case IPR_VIRBND:
335: if (env->features & FEATURE_VIRBND)
336: *valp = env->ipr[IPR_VIRBND];
337: else
338: ret = -1;
339: break;
340: case IPR_VPTB:
341: *valp = env->ipr[IPR_VPTB];
342: break;
343: case IPR_WHAMI:
344: *valp = env->ipr[IPR_WHAMI];
345: break;
346: default:
347: /* Invalid */
348: ret = -1;
349: break;
350: }
351:
352: return ret;
353: }
354:
355: int cpu_alpha_mtpr (CPUState *env, int iprn, uint64_t val, uint64_t *oldvalp)
356: {
357: uint64_t hwpcb, tmp64;
358: uint8_t tmp8;
359: int ret = 0;
360:
361: hwpcb = env->ipr[IPR_PCBB];
362: switch (iprn) {
363: case IPR_ASN:
364: /* Read-only */
365: ret = -1;
366: break;
367: case IPR_ASTEN:
368: tmp8 = ((int8_t)(env->ipr[IPR_ASTEN] << 4)) >> 4;
369: *oldvalp = tmp8;
370: tmp8 &= val & 0xF;
371: tmp8 |= (val >> 4) & 0xF;
372: env->ipr[IPR_ASTEN] &= ~0xF;
373: env->ipr[IPR_ASTEN] |= tmp8;
374: ret = 1;
375: break;
376: case IPR_ASTSR:
377: tmp8 = ((int8_t)(env->ipr[IPR_ASTSR] << 4)) >> 4;
378: *oldvalp = tmp8;
379: tmp8 &= val & 0xF;
380: tmp8 |= (val >> 4) & 0xF;
381: env->ipr[IPR_ASTSR] &= ~0xF;
382: env->ipr[IPR_ASTSR] |= tmp8;
383: ret = 1;
384: case IPR_DATFX:
385: env->ipr[IPR_DATFX] &= ~0x1;
386: env->ipr[IPR_DATFX] |= val & 1;
387: tmp64 = ldq_raw(hwpcb + 56);
388: tmp64 &= ~0x8000000000000000ULL;
389: tmp64 |= (val & 1) << 63;
390: stq_raw(hwpcb + 56, tmp64);
391: break;
392: case IPR_ESP:
393: if (env->features & FEATURE_SPS)
394: env->ipr[IPR_ESP] = val;
395: else
396: stq_raw(hwpcb + 8, val);
397: break;
398: case IPR_FEN:
399: env->ipr[IPR_FEN] = val & 1;
400: tmp64 = ldq_raw(hwpcb + 56);
401: tmp64 &= ~1;
402: tmp64 |= val & 1;
403: stq_raw(hwpcb + 56, tmp64);
404: break;
405: case IPR_IPIR:
406: /* XXX: TODO: Send IRQ to CPU #ir[16] */
407: break;
408: case IPR_IPL:
409: *oldvalp = ((int64_t)(env->ipr[IPR_IPL] << 59)) >> 59;
410: env->ipr[IPR_IPL] &= ~0x1F;
411: env->ipr[IPR_IPL] |= val & 0x1F;
412: /* XXX: may issue an interrupt or ASR _now_ */
413: ret = 1;
414: break;
415: case IPR_KSP:
416: if (!(env->ipr[IPR_EXC_ADDR] & 1)) {
417: ret = -1;
418: } else {
419: if (env->features & FEATURE_SPS)
420: env->ipr[IPR_KSP] = val;
421: else
422: stq_raw(hwpcb + 0, val);
423: }
424: break;
425: case IPR_MCES:
426: env->ipr[IPR_MCES] &= ~((val & 0x7) | 0x18);
427: env->ipr[IPR_MCES] |= val & 0x18;
428: break;
429: case IPR_PERFMON:
430: /* Implementation specific */
431: *oldvalp = 0;
432: ret = 1;
433: break;
434: case IPR_PCBB:
435: /* Read-only */
436: ret = -1;
437: break;
438: case IPR_PRBR:
439: env->ipr[IPR_PRBR] = val;
440: break;
441: case IPR_PTBR:
442: /* Read-only */
443: ret = -1;
444: break;
445: case IPR_SCBB:
446: env->ipr[IPR_SCBB] = (uint32_t)val;
447: break;
448: case IPR_SIRR:
449: if (val & 0xF) {
450: env->ipr[IPR_SISR] |= 1 << (val & 0xF);
451: /* XXX: request a software interrupt _now_ */
452: }
453: break;
454: case IPR_SISR:
455: /* Read-only */
456: ret = -1;
457: break;
458: case IPR_SSP:
459: if (env->features & FEATURE_SPS)
460: env->ipr[IPR_SSP] = val;
461: else
462: stq_raw(hwpcb + 16, val);
463: break;
464: case IPR_SYSPTBR:
465: if (env->features & FEATURE_VIRBND)
466: env->ipr[IPR_SYSPTBR] = val;
467: else
468: ret = -1;
1.1.1.4 ! root 469: break;
1.1 root 470: case IPR_TBCHK:
471: /* Read-only */
472: ret = -1;
473: break;
474: case IPR_TBIA:
475: tlb_flush(env, 1);
476: break;
477: case IPR_TBIAP:
478: tlb_flush(env, 1);
479: break;
480: case IPR_TBIS:
481: tlb_flush_page(env, val);
482: break;
483: case IPR_TBISD:
484: tlb_flush_page(env, val);
485: break;
486: case IPR_TBISI:
487: tlb_flush_page(env, val);
488: break;
489: case IPR_USP:
490: if (env->features & FEATURE_SPS)
491: env->ipr[IPR_USP] = val;
492: else
493: stq_raw(hwpcb + 24, val);
494: break;
495: case IPR_VIRBND:
496: if (env->features & FEATURE_VIRBND)
497: env->ipr[IPR_VIRBND] = val;
498: else
499: ret = -1;
500: break;
501: case IPR_VPTB:
502: env->ipr[IPR_VPTB] = val;
503: break;
504: case IPR_WHAMI:
505: /* Read-only */
506: ret = -1;
507: break;
508: default:
509: /* Invalid */
510: ret = -1;
511: break;
512: }
513:
514: return ret;
515: }
516:
517: void do_interrupt (CPUState *env)
518: {
519: int excp;
520:
521: env->ipr[IPR_EXC_ADDR] = env->pc | 1;
522: excp = env->exception_index;
1.1.1.4 ! root 523: env->exception_index = -1;
1.1 root 524: env->error_code = 0;
525: /* XXX: disable interrupts and memory mapping */
526: if (env->ipr[IPR_PAL_BASE] != -1ULL) {
527: /* We use native PALcode */
528: env->pc = env->ipr[IPR_PAL_BASE] + excp;
529: } else {
530: /* We use emulated PALcode */
531: call_pal(env);
532: /* Emulate REI */
533: env->pc = env->ipr[IPR_EXC_ADDR] & ~7;
534: env->ipr[IPR_EXC_ADDR] = env->ipr[IPR_EXC_ADDR] & 1;
535: /* XXX: re-enable interrupts and memory mapping */
536: }
537: }
538: #endif
539:
540: void cpu_dump_state (CPUState *env, FILE *f,
541: int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
542: int flags)
543: {
1.1.1.2 root 544: static const char *linux_reg_names[] = {
1.1 root 545: "v0 ", "t0 ", "t1 ", "t2 ", "t3 ", "t4 ", "t5 ", "t6 ",
546: "t7 ", "s0 ", "s1 ", "s2 ", "s3 ", "s4 ", "s5 ", "fp ",
547: "a0 ", "a1 ", "a2 ", "a3 ", "a4 ", "a5 ", "t8 ", "t9 ",
548: "t10", "t11", "ra ", "t12", "at ", "gp ", "sp ", "zero",
549: };
550: int i;
551:
552: cpu_fprintf(f, " PC " TARGET_FMT_lx " PS " TARGET_FMT_lx "\n",
553: env->pc, env->ps);
554: for (i = 0; i < 31; i++) {
555: cpu_fprintf(f, "IR%02d %s " TARGET_FMT_lx " ", i,
556: linux_reg_names[i], env->ir[i]);
557: if ((i % 3) == 2)
558: cpu_fprintf(f, "\n");
559: }
1.1.1.4 ! root 560:
! 561: cpu_fprintf(f, "lock_a " TARGET_FMT_lx " lock_v " TARGET_FMT_lx "\n",
! 562: env->lock_addr, env->lock_value);
! 563:
1.1 root 564: for (i = 0; i < 31; i++) {
565: cpu_fprintf(f, "FIR%02d " TARGET_FMT_lx " ", i,
566: *((uint64_t *)(&env->fir[i])));
567: if ((i % 3) == 2)
568: cpu_fprintf(f, "\n");
569: }
1.1.1.4 ! root 570: cpu_fprintf(f, "\n");
1.1 root 571: }
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