183 case MISCREG_ICC_MGRPEN1:
184 case MISCREG_ICC_IGRPEN1_EL3: {
185 // EnableGrp1S and EnableGrp1NS are aliased with
186 // ICC_IGRPEN1_EL1_S.Enable and ICC_IGRPEN1_EL1_NS.Enable
187 bool enable_grp_1s =
188 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1_S) &
189 ICC_IGRPEN1_EL1_ENABLE;
190 bool enable_grp_1ns =
191 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1_NS) &
192 ICC_IGRPEN1_EL1_ENABLE;
193 value = 0;
194
195 if (enable_grp_1s) {
196 value |= ICC_IGRPEN1_EL3_ENABLEGRP1S;
197 }
198
199 if (enable_grp_1ns) {
200 value |= ICC_IGRPEN1_EL3_ENABLEGRP1NS;
201 }
202
203 break;
204 }
205
206 case MISCREG_ICC_RPR:
207 case MISCREG_ICC_RPR_EL1: {
208 if ((currEL() == EL1) && !inSecureState() &&
209 (hcr_imo || hcr_fmo)) {
210 return readMiscReg(MISCREG_ICV_RPR_EL1);
211 }
212
213 uint8_t rprio = highestActivePriority();
214
215 if (haveEL(EL3) && !inSecureState() &&
216 (isa->readMiscRegNoEffect(MISCREG_SCR_EL3) & (1U << 2))) {
217 /* NS GIC access and Group 0 is inaccessible to NS */
218 if ((rprio & 0x80) == 0) {
219 /* NS should not see priorities in the Secure half of the
220 * range */
221 rprio = 0;
222 } else if (rprio != 0xff) {
223 /* Non-idle priority: show the Non-secure view of it */
224 rprio = (rprio << 1) & 0xff;
225 }
226 }
227
228 value = rprio;
229 break;
230 }
231
232 case MISCREG_ICV_RPR_EL1: {
233 value = virtualHighestActivePriority();
234 break;
235 }
236
237 case MISCREG_ICC_HPPIR0:
238 case MISCREG_ICC_HPPIR0_EL1: {
239 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
240 return readMiscReg(MISCREG_ICV_HPPIR0_EL1);
241 }
242
243 value = getHPPIR0();
244 break;
245 }
246
247 case MISCREG_ICV_HPPIR0_EL1: {
248 value = Gicv3::INTID_SPURIOUS;
249 int lr_idx = getHPPVILR();
250
251 if (lr_idx >= 0) {
252 RegVal lr =
253 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
254 Gicv3::GroupId group =
255 lr & ICH_LR_EL2_GROUP ? Gicv3::G1NS : Gicv3::G0S;
256
257 if (group == Gicv3::G0S) {
258 value = bits(lr, 31, 0);
259 }
260 }
261
262 break;
263 }
264
265 case MISCREG_ICC_HPPIR1:
266 case MISCREG_ICC_HPPIR1_EL1: {
267 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
268 return readMiscReg(MISCREG_ICV_HPPIR1_EL1);
269 }
270
271 value = getHPPIR1();
272 break;
273 }
274
275 case MISCREG_ICV_HPPIR1_EL1: {
276 value = Gicv3::INTID_SPURIOUS;
277 int lr_idx = getHPPVILR();
278
279 if (lr_idx >= 0) {
280 RegVal lr =
281 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
282 Gicv3::GroupId group =
283 lr & ICH_LR_EL2_GROUP ? Gicv3::G1NS : Gicv3::G0S;
284
285 if (group == Gicv3::G1NS) {
286 value = bits(lr, 31, 0);
287 }
288 }
289
290 break;
291 }
292
293 case MISCREG_ICC_BPR0:
294 case MISCREG_ICC_BPR0_EL1:
295 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
296 return readMiscReg(MISCREG_ICV_BPR0_EL1);
297 }
298
299 M5_FALLTHROUGH;
300
301 case MISCREG_ICC_BPR1:
302 case MISCREG_ICC_BPR1_EL1:
303 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
304 return readMiscReg(MISCREG_ICV_BPR1_EL1);
305 }
306
307 {
308 Gicv3::GroupId group =
309 misc_reg == MISCREG_ICC_BPR0_EL1 ? Gicv3::G0S : Gicv3::G1S;
310
311 if (group == Gicv3::G1S && !inSecureState()) {
312 group = Gicv3::G1NS;
313 }
314
315 if ((group == Gicv3::G1S) &&
316 !isEL3OrMon() &&
317 (isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S)
318 & ICC_CTLR_EL1_CBPR)) {
319 group = Gicv3::G0S;
320 }
321
322 bool sat_inc = false;
323
324 if ((group == Gicv3::G1NS) &&
325 (currEL() < EL3) &&
326 (isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS)
327 & ICC_CTLR_EL1_CBPR)) {
328 // Reads return BPR0 + 1 saturated to 7, WI
329 group = Gicv3::G0S;
330 sat_inc = true;
331 }
332
333 uint8_t bpr;
334
335 if (group == Gicv3::G0S) {
336 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR0_EL1);
337 } else {
338 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR1_EL1);
339 }
340
341 if (sat_inc) {
342 bpr++;
343
344 if (bpr > 7) {
345 bpr = 7;
346 }
347 }
348
349 value = bpr;
350 break;
351 }
352
353 case MISCREG_ICV_BPR0_EL1:
354 case MISCREG_ICV_BPR1_EL1: {
355 Gicv3::GroupId group =
356 misc_reg == MISCREG_ICV_BPR0_EL1 ? Gicv3::G0S : Gicv3::G1NS;
357 RegVal ich_vmcr_el2 =
358 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
359 bool sat_inc = false;
360
361 if (group == Gicv3::G1NS && (ich_vmcr_el2 & ICH_VMCR_EL2_VCBPR)) {
362 // reads return bpr0 + 1 saturated to 7, writes ignored
363 group = Gicv3::G0S;
364 sat_inc = true;
365 }
366
367 uint8_t vbpr;
368
369 if (group == Gicv3::G0S) {
370 vbpr = bits(ich_vmcr_el2, 23, 21);
371 } else {
372 vbpr = bits(ich_vmcr_el2, 20, 18);
373 }
374
375 if (sat_inc) {
376 vbpr++;
377
378 if (vbpr > 7) {
379 vbpr = 7;
380 }
381 }
382
383 value = vbpr;
384 break;
385 }
386
387 case MISCREG_ICC_PMR:
388 case MISCREG_ICC_PMR_EL1: // Priority Mask Register
389 if ((currEL() == EL1) && !inSecureState() &&
390 (hcr_imo || hcr_fmo)) {
391 return isa->readMiscRegNoEffect(MISCREG_ICV_PMR_EL1);
392 }
393
394 if (haveEL(EL3) && !inSecureState() &&
395 (isa->readMiscRegNoEffect(MISCREG_SCR_EL3) & (1U << 2))) {
396 /* NS GIC access and Group 0 is inaccessible to NS */
397 if ((value & 0x80) == 0) {
398 /* NS should not see priorities in the Secure half of the
399 * range */
400 value = 0;
401 } else if (value != 0xff) {
402 /* Non-idle priority: show the Non-secure view of it */
403 value = (value << 1) & 0xff;
404 }
405 }
406
407 break;
408
409 case MISCREG_ICC_IAR0:
410 case MISCREG_ICC_IAR0_EL1: { // Interrupt Acknowledge Register 0
411 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
412 return readMiscReg(MISCREG_ICV_IAR0_EL1);
413 }
414
415 uint32_t int_id;
416
417 if (hppiCanPreempt()) {
418 int_id = getHPPIR0();
419
420 // avoid activation for special interrupts
421 if (int_id < Gicv3::INTID_SECURE) {
422 activateIRQ(int_id, hppi.group);
423 }
424 } else {
425 int_id = Gicv3::INTID_SPURIOUS;
426 }
427
428 value = int_id;
429 break;
430 }
431
432 case MISCREG_ICV_IAR0_EL1: {
433 int lr_idx = getHPPVILR();
434 uint32_t int_id = Gicv3::INTID_SPURIOUS;
435
436 if (lr_idx >= 0) {
437 RegVal lr =
438 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
439
440 if (!(lr & ICH_LR_EL2_GROUP) && hppviCanPreempt(lr_idx)) {
441 int_id = value = bits(lr, 31, 0);
442
443 if (int_id < Gicv3::INTID_SECURE ||
444 int_id > Gicv3::INTID_SPURIOUS) {
445 virtualActivateIRQ(lr_idx);
446 } else {
447 // Bogus... Pseudocode says:
448 // - Move from pending to invalid...
449 // - Return de bogus id...
450 lr &= ~ICH_LR_EL2_STATE_PENDING_BIT;
451 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx,
452 lr);
453 }
454 }
455 }
456
457 value = int_id;
458 virtualUpdate();
459 break;
460 }
461
462 case MISCREG_ICC_IAR1:
463 case MISCREG_ICC_IAR1_EL1: { // Interrupt Acknowledge Register 1
464 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
465 return readMiscReg(MISCREG_ICV_IAR1_EL1);
466 }
467
468 uint32_t int_id;
469
470 if (hppiCanPreempt()) {
471 int_id = getHPPIR1();
472
473 // avoid activation for special interrupts
474 if (int_id < Gicv3::INTID_SECURE) {
475 activateIRQ(int_id, hppi.group);
476 }
477
478 // LPIs are not activated and when acked their pending
479 // bit is cleared
480 if (int_id >= Gicv3Redistributor::SMALLEST_LPI_ID)
481 {
482 redistributor->setClrLPI(int_id, false);
483 }
484
485 } else {
486 int_id = Gicv3::INTID_SPURIOUS;
487 }
488
489 value = int_id;
490 break;
491 }
492
493 case MISCREG_ICV_IAR1_EL1: {
494 int lr_idx = getHPPVILR();
495 uint32_t int_id = Gicv3::INTID_SPURIOUS;
496
497 if (lr_idx >= 0) {
498 RegVal lr =
499 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
500
501 if (lr & ICH_LR_EL2_GROUP && hppviCanPreempt(lr_idx)) {
502 int_id = value = bits(lr, 31, 0);
503
504 if (int_id < Gicv3::INTID_SECURE ||
505 int_id > Gicv3::INTID_SPURIOUS) {
506 virtualActivateIRQ(lr_idx);
507 } else {
508 // Bogus... Pseudocode says:
509 // - Move from pending to invalid...
510 // - Return de bogus id...
511 lr &= ~ICH_LR_EL2_STATE_PENDING_BIT;
512 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx,
513 lr);
514 }
515 }
516 }
517
518 value = int_id;
519 virtualUpdate();
520 break;
521 }
522
523 case MISCREG_ICC_SRE:
524 case MISCREG_ICC_SRE_EL1: { // System Register Enable Register
525 bool dfb;
526 bool dib;
527
528 if (haveEL(EL3) && !distributor->DS) {
529 // DIB is RO alias of ICC_SRE_EL3.DIB
530 // DFB is RO alias of ICC_SRE_EL3.DFB
531 RegVal icc_sre_el3 =
532 isa->readMiscRegNoEffect(MISCREG_ICC_SRE_EL3);
533 dfb = icc_sre_el3 & ICC_SRE_EL3_DFB;
534 dib = icc_sre_el3 & ICC_SRE_EL3_DIB;
535 } else if (haveEL(EL3) && distributor->DS) {
536 // DIB is RW alias of ICC_SRE_EL3.DIB
537 // DFB is RW alias of ICC_SRE_EL3.DFB
538 RegVal icc_sre_el3 =
539 isa->readMiscRegNoEffect(MISCREG_ICC_SRE_EL3);
540 dfb = icc_sre_el3 & ICC_SRE_EL3_DFB;
541 dib = icc_sre_el3 & ICC_SRE_EL3_DIB;
542 } else if ((!haveEL(EL3) || distributor->DS) and haveEL(EL2)) {
543 // DIB is RO alias of ICC_SRE_EL2.DIB
544 // DFB is RO alias of ICC_SRE_EL2.DFB
545 RegVal icc_sre_el2 =
546 isa->readMiscRegNoEffect(MISCREG_ICC_SRE_EL2);
547 dfb = icc_sre_el2 & ICC_SRE_EL2_DFB;
548 dib = icc_sre_el2 & ICC_SRE_EL2_DIB;
549 } else {
550 dfb = value & ICC_SRE_EL1_DFB;
551 dib = value & ICC_SRE_EL1_DIB;
552 }
553
554 value = ICC_SRE_EL1_SRE;
555
556 if (dfb) {
557 value |= ICC_SRE_EL1_DFB;
558 }
559
560 if (dib) {
561 value |= ICC_SRE_EL1_DIB;
562 }
563
564 break;
565 }
566
567 case MISCREG_ICC_HSRE:
568 case MISCREG_ICC_SRE_EL2: // System Register Enable Register
569 /*
570 * Enable [3] == 1
571 * (Secure EL1 accesses to Secure ICC_SRE_EL1 do not trap to EL2,
572 * RAO/WI)
573 * DIB [2] == 1 (IRQ bypass not supported, RAO/WI)
574 * DFB [1] == 1 (FIQ bypass not supported, RAO/WI)
575 * SRE [0] == 1 (Only system register interface supported, RAO/WI)
576 */
577 value = ICC_SRE_EL2_ENABLE | ICC_SRE_EL2_DIB | ICC_SRE_EL2_DFB |
578 ICC_SRE_EL2_SRE;
579 break;
580
581 case MISCREG_ICC_MSRE:
582 case MISCREG_ICC_SRE_EL3: // System Register Enable Register
583 /*
584 * Enable [3] == 1
585 * (Secure EL1 accesses to Secure ICC_SRE_EL1 do not trap to EL3,
586 * RAO/WI)
587 * DIB [2] == 1 (IRQ bypass not supported, RAO/WI)
588 * DFB [1] == 1 (FIQ bypass not supported, RAO/WI)
589 * SRE [0] == 1 (Only system register interface supported, RAO/WI)
590 */
591 value = ICC_SRE_EL3_ENABLE | ICC_SRE_EL3_DIB | ICC_SRE_EL3_DFB |
592 ICC_SRE_EL3_SRE;
593 break;
594
595 case MISCREG_ICC_CTLR:
596 case MISCREG_ICC_CTLR_EL1: { // Control Register
597 if ((currEL() == EL1) && !inSecureState() &&
598 (hcr_imo || hcr_fmo)) {
599 return readMiscReg(MISCREG_ICV_CTLR_EL1);
600 }
601
602 // Add value for RO bits
603 // IDbits [13:11], 001 = 24 bits | 000 = 16 bits
604 // PRIbits [10:8], number of priority bits implemented, minus one
605 value |= ICC_CTLR_EL1_RSS | ICC_CTLR_EL1_A3V |
606 (1 << 11) | ((PRIORITY_BITS - 1) << 8);
607 break;
608 }
609
610 case MISCREG_ICV_CTLR_EL1: {
611 value = ICC_CTLR_EL1_A3V | (1 << ICC_CTLR_EL1_IDBITS_SHIFT) |
612 (7 << ICC_CTLR_EL1_PRIBITS_SHIFT);
613 RegVal ich_vmcr_el2 =
614 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
615
616 if (ich_vmcr_el2 & ICH_VMCR_EL2_VEOIM) {
617 value |= ICC_CTLR_EL1_EOIMODE;
618 }
619
620 if (ich_vmcr_el2 & ICH_VMCR_EL2_VCBPR) {
621 value |= ICC_CTLR_EL1_CBPR;
622 }
623
624 break;
625 }
626
627 case MISCREG_ICC_MCTLR:
628 case MISCREG_ICC_CTLR_EL3: {
629 // Add value for RO bits
630 // RSS [18]
631 // A3V [15]
632 // IDbits [13:11], 001 = 24 bits | 000 = 16 bits
633 // PRIbits [10:8], number of priority bits implemented, minus one
634 value |= ICC_CTLR_EL3_RSS | ICC_CTLR_EL3_A3V | (0 << 11) |
635 ((PRIORITY_BITS - 1) << 8);
636 // Aliased bits...
637 RegVal icc_ctlr_el1_ns =
638 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS);
639 RegVal icc_ctlr_el1_s =
640 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S);
641
642 if (icc_ctlr_el1_ns & ICC_CTLR_EL1_EOIMODE) {
643 value |= ICC_CTLR_EL3_EOIMODE_EL1NS;
644 }
645
646 if (icc_ctlr_el1_ns & ICC_CTLR_EL1_CBPR) {
647 value |= ICC_CTLR_EL3_CBPR_EL1NS;
648 }
649
650 if (icc_ctlr_el1_s & ICC_CTLR_EL1_EOIMODE) {
651 value |= ICC_CTLR_EL3_EOIMODE_EL1S;
652 }
653
654 if (icc_ctlr_el1_s & ICC_CTLR_EL1_CBPR) {
655 value |= ICC_CTLR_EL3_CBPR_EL1S;
656 }
657
658 break;
659 }
660
661 case MISCREG_ICH_HCR:
662 case MISCREG_ICH_HCR_EL2:
663 break;
664
665 case MISCREG_ICH_AP0R0:
666 case MISCREG_ICH_AP0R0_EL2:
667 break;
668
669 case MISCREG_ICH_AP1R0:
670 case MISCREG_ICH_AP1R0_EL2:
671 break;
672
673 case MISCREG_ICH_MISR:
674 case MISCREG_ICH_MISR_EL2: {
675 value = 0;
676 // Scan list registers and fill in the U, NP and EOI bits
677 eoiMaintenanceInterruptStatus((uint32_t *) &value);
678 RegVal ich_hcr_el2 =
679 isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
680 RegVal ich_vmcr_el2 =
681 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
682
683 if (ich_hcr_el2 &
684 (ICH_HCR_EL2_LRENPIE | ICH_HCR_EL2_EOICOUNT_MASK)) {
685 value |= ICH_MISR_EL2_LRENP;
686 }
687
688 if ((ich_hcr_el2 & ICH_HCR_EL2_VGRP0EIE) &&
689 (ich_vmcr_el2 & ICH_VMCR_EL2_VENG0)) {
690 value |= ICH_MISR_EL2_VGRP0E;
691 }
692
693 if ((ich_hcr_el2 & ICH_HCR_EL2_VGRP0DIE) &&
694 !(ich_vmcr_el2 & ICH_VMCR_EL2_VENG1)) {
695 value |= ICH_MISR_EL2_VGRP0D;
696 }
697
698 if ((ich_hcr_el2 & ICH_HCR_EL2_VGRP1EIE) &&
699 (ich_vmcr_el2 & ICH_VMCR_EL2_VENG1)) {
700 value |= ICH_MISR_EL2_VGRP1E;
701 }
702
703 if ((ich_hcr_el2 & ICH_HCR_EL2_VGRP1DIE) &&
704 !(ich_vmcr_el2 & ICH_VMCR_EL2_VENG1)) {
705 value |= ICH_MISR_EL2_VGRP1D;
706 }
707
708 break;
709 }
710
711 case MISCREG_ICH_VTR:
712 case MISCREG_ICH_VTR_EL2:
713 /*
714 * PRIbits [31:29]
715 * PREbits [28:26]
716 * IDbits [25:23]
717 * SEIS [22] == 0 (SEI Support)
718 * A3V [21] == 1
719 * (Non-zero values supported for Affinity 3 in SGI genearion)
720 * nV4 [20] == 0
721 * (Support for direct injection of virtual interrupts)
722 * TDS [19] == 0 (Implementation supports ICH_HCR_EL2.TDIR)
723 * ListRegs [4:0]
724 */
725 value = (16 - 1) << 0 |
726 (5 - 1) << 26 |
727 (5 - 1) << 29;
728 value =
729 ((VIRTUAL_NUM_LIST_REGS - 1) << ICH_VTR_EL2_LISTREGS_SHIFT) |
730 // ICH_VTR_EL2_TDS |
731 // ICH_VTR_EL2_NV4 |
732 ICH_VTR_EL2_A3V |
733 (1 << ICH_VTR_EL2_IDBITS_SHIFT) |
734 ((VIRTUAL_PREEMPTION_BITS - 1) << ICH_VTR_EL2_PREBITS_SHIFT) |
735 ((VIRTUAL_PRIORITY_BITS - 1) << ICH_VTR_EL2_PRIBITS_SHIFT);
736 break;
737
738 case MISCREG_ICH_EISR:
739 case MISCREG_ICH_EISR_EL2:
740 value = eoiMaintenanceInterruptStatus(nullptr);
741 break;
742
743 case MISCREG_ICH_ELRSR:
744 case MISCREG_ICH_ELRSR_EL2:
745 value = 0;
746
747 for (int lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) {
748 RegVal lr =
749 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
750
751 if ((lr & ICH_LR_EL2_STATE_MASK) == 0 &&
752 ((lr & ICH_LR_EL2_HW) != 0 ||
753 (lr & ICH_LR_EL2_EOI) == 0)) {
754 value |= (1 << lr_idx);
755 }
756 }
757
758 break;
759
760 case MISCREG_ICH_LRC0 ... MISCREG_ICH_LRC15:
761 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 high half part)
762 value = value >> 32;
763 break;
764
765 case MISCREG_ICH_LR0 ... MISCREG_ICH_LR15:
766 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 low half part)
767 value = value & 0xffffffff;
768 break;
769
770 case MISCREG_ICH_LR0_EL2 ... MISCREG_ICH_LR15_EL2:
771 break;
772
773 case MISCREG_ICH_VMCR:
774 case MISCREG_ICH_VMCR_EL2:
775 break;
776
777 default:
778 panic("Gicv3CPUInterface::readMiscReg(): "
779 "unknown register %d (%s)",
780 misc_reg, miscRegName[misc_reg]);
781 }
782
783 DPRINTF(GIC, "Gicv3CPUInterface::readMiscReg(): "
784 "register %s value %#x\n", miscRegName[misc_reg], value);
785 return value;
786}
787
788void
789Gicv3CPUInterface::setMiscReg(int misc_reg, RegVal val)
790{
791 bool do_virtual_update = false;
792 DPRINTF(GIC, "Gicv3CPUInterface::setMiscReg(): "
793 "register %s value %#x\n", miscRegName[misc_reg], val);
794 bool hcr_fmo = getHCREL2FMO();
795 bool hcr_imo = getHCREL2IMO();
796
797 switch (misc_reg) {
798 case MISCREG_ICC_AP1R0:
799 case MISCREG_ICC_AP1R0_EL1:
800 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
801 return isa->setMiscRegNoEffect(MISCREG_ICV_AP1R0_EL1, val);
802 }
803
804 break;
805
806 case MISCREG_ICC_AP1R1:
807 case MISCREG_ICC_AP1R1_EL1:
808
809 // only implemented if supporting 6 or more bits of priority
810 case MISCREG_ICC_AP1R2:
811 case MISCREG_ICC_AP1R2_EL1:
812
813 // only implemented if supporting 7 or more bits of priority
814 case MISCREG_ICC_AP1R3:
815 case MISCREG_ICC_AP1R3_EL1:
816 // only implemented if supporting 7 or more bits of priority
817 break;
818
819 case MISCREG_ICC_AP0R0:
820 case MISCREG_ICC_AP0R0_EL1:
821 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
822 return isa->setMiscRegNoEffect(MISCREG_ICV_AP0R0_EL1, val);
823 }
824
825 break;
826
827 case MISCREG_ICC_AP0R1:
828 case MISCREG_ICC_AP0R1_EL1:
829
830 // only implemented if supporting 6 or more bits of priority
831 case MISCREG_ICC_AP0R2:
832 case MISCREG_ICC_AP0R2_EL1:
833
834 // only implemented if supporting 7 or more bits of priority
835 case MISCREG_ICC_AP0R3:
836 case MISCREG_ICC_AP0R3_EL1:
837 // only implemented if supporting 7 or more bits of priority
838 break;
839
840 case MISCREG_ICC_EOIR0:
841 case MISCREG_ICC_EOIR0_EL1: { // End Of Interrupt Register 0
842 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
843 return setMiscReg(MISCREG_ICV_EOIR0_EL1, val);
844 }
845
846 int int_id = val & 0xffffff;
847
848 // avoid activation for special interrupts
849 if (int_id >= Gicv3::INTID_SECURE) {
850 return;
851 }
852
853 Gicv3::GroupId group = Gicv3::G0S;
854
855 if (highestActiveGroup() != group) {
856 return;
857 }
858
859 dropPriority(group);
860
861 if (!isEOISplitMode()) {
862 deactivateIRQ(int_id, group);
863 }
864
865 break;
866 }
867
868 case MISCREG_ICV_EOIR0_EL1: {
869 int int_id = val & 0xffffff;
870
871 // avoid deactivation for special interrupts
872 if (int_id >= Gicv3::INTID_SECURE &&
873 int_id <= Gicv3::INTID_SPURIOUS) {
874 return;
875 }
876
877 uint8_t drop_prio = virtualDropPriority();
878
879 if (drop_prio == 0xff) {
880 return;
881 }
882
883 int lr_idx = virtualFindActive(int_id);
884
885 if (lr_idx < 0) {
886 // No LR found matching
887 virtualIncrementEOICount();
888 } else {
889 RegVal lr =
890 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
891 Gicv3::GroupId lr_group =
892 lr & ICH_LR_EL2_GROUP ? Gicv3::G1NS : Gicv3::G0S;
893 uint8_t lr_group_prio = bits(lr, 55, 48) & 0xf8;
894
895 if (lr_group == Gicv3::G0S && lr_group_prio == drop_prio) {
896 //JAIRO if (!virtualIsEOISplitMode())
897 {
898 virtualDeactivateIRQ(lr_idx);
899 }
900 }
901 }
902
903 virtualUpdate();
904 break;
905 }
906
907 case MISCREG_ICC_EOIR1:
908 case MISCREG_ICC_EOIR1_EL1: { // End Of Interrupt Register 1
909 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
910 return setMiscReg(MISCREG_ICV_EOIR1_EL1, val);
911 }
912
913 int int_id = val & 0xffffff;
914
915 // avoid deactivation for special interrupts
916 if (int_id >= Gicv3::INTID_SECURE) {
917 return;
918 }
919
920 Gicv3::GroupId group =
921 inSecureState() ? Gicv3::G1S : Gicv3::G1NS;
922
923 if (highestActiveGroup() == Gicv3::G0S) {
924 return;
925 }
926
927 if (distributor->DS == 0) {
928 if (highestActiveGroup() == Gicv3::G1S && !inSecureState()) {
929 return;
930 } else if (highestActiveGroup() == Gicv3::G1NS &&
931 !(!inSecureState() or (currEL() == EL3))) {
932 return;
933 }
934 }
935
936 dropPriority(group);
937
938 if (!isEOISplitMode()) {
939 deactivateIRQ(int_id, group);
940 }
941
942 break;
943 }
944
945 case MISCREG_ICV_EOIR1_EL1: {
946 int int_id = val & 0xffffff;
947
948 // avoid deactivation for special interrupts
949 if (int_id >= Gicv3::INTID_SECURE &&
950 int_id <= Gicv3::INTID_SPURIOUS) {
951 return;
952 }
953
954 uint8_t drop_prio = virtualDropPriority();
955
956 if (drop_prio == 0xff) {
957 return;
958 }
959
960 int lr_idx = virtualFindActive(int_id);
961
962 if (lr_idx < 0) {
963 // No LR found matching
964 virtualIncrementEOICount();
965 } else {
966 RegVal lr =
967 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
968 Gicv3::GroupId lr_group =
969 lr & ICH_LR_EL2_GROUP ? Gicv3::G1NS : Gicv3::G0S;
970 uint8_t lr_group_prio = bits(lr, 55, 48) & 0xf8;
971
972 if (lr_group == Gicv3::G1NS && lr_group_prio == drop_prio) {
973 if (!virtualIsEOISplitMode()) {
974 virtualDeactivateIRQ(lr_idx);
975 }
976 }
977 }
978
979 virtualUpdate();
980 break;
981 }
982
983 case MISCREG_ICC_DIR:
984 case MISCREG_ICC_DIR_EL1: { // Deactivate Interrupt Register
985 if ((currEL() == EL1) && !inSecureState() &&
986 (hcr_imo || hcr_fmo)) {
987 return setMiscReg(MISCREG_ICV_DIR_EL1, val);
988 }
989
990 int int_id = val & 0xffffff;
991
992 // avoid deactivation for special interrupts
993 if (int_id >= Gicv3::INTID_SECURE) {
994 return;
995 }
996
997 if (!isEOISplitMode()) {
998 return;
999 }
1000
1001 /*
1002 * Check whether we're allowed to deactivate.
1003 * These checks are correspond to the spec's pseudocode.
1004 */
1005 Gicv3::GroupId group =
1006 int_id >= 32 ? distributor->getIntGroup(int_id) :
1007 redistributor->getIntGroup(int_id);
1008 bool irq_is_grp0 = group == Gicv3::G0S;
1009 bool single_sec_state = distributor->DS;
1010 bool irq_is_secure = !single_sec_state && (group != Gicv3::G1NS);
1011 SCR scr_el3 = isa->readMiscRegNoEffect(MISCREG_SCR_EL3);
1012 bool route_fiq_to_el3 = scr_el3.fiq;
1013 bool route_irq_to_el3 = scr_el3.irq;
1014 bool route_fiq_to_el2 = hcr_fmo;
1015 bool route_irq_to_el2 = hcr_imo;
1016
1017 switch (currEL()) {
1018 case EL3:
1019 break;
1020
1021 case EL2:
1022 if (single_sec_state && irq_is_grp0 && !route_fiq_to_el3) {
1023 break;
1024 }
1025
1026 if (!irq_is_secure && !irq_is_grp0 && !route_irq_to_el3) {
1027 break;
1028 }
1029
1030 return;
1031
1032 case EL1:
1033 if (!isSecureBelowEL3()) {
1034 if (single_sec_state && irq_is_grp0 &&
1035 !route_fiq_to_el3 && !route_fiq_to_el2) {
1036 break;
1037 }
1038
1039 if (!irq_is_secure && !irq_is_grp0 &&
1040 !route_irq_to_el3 && !route_irq_to_el2) {
1041 break;
1042 }
1043 } else {
1044 if (irq_is_grp0 && !route_fiq_to_el3) {
1045 break;
1046 }
1047
1048 if (!irq_is_grp0 &&
1049 (!irq_is_secure || !single_sec_state) &&
1050 !route_irq_to_el3) {
1051 break;
1052 }
1053 }
1054
1055 return;
1056
1057 default:
1058 break;
1059 }
1060
1061 deactivateIRQ(int_id, group);
1062 break;
1063 }
1064
1065 case MISCREG_ICV_DIR_EL1: {
1066 int int_id = val & 0xffffff;
1067
1068 // avoid deactivation for special interrupts
1069 if (int_id >= Gicv3::INTID_SECURE &&
1070 int_id <= Gicv3::INTID_SPURIOUS) {
1071 return;
1072 }
1073
1074 if (!virtualIsEOISplitMode()) {
1075 return;
1076 }
1077
1078 int lr_idx = virtualFindActive(int_id);
1079
1080 if (lr_idx < 0) {
1081 // No LR found matching
1082 virtualIncrementEOICount();
1083 } else {
1084 virtualDeactivateIRQ(lr_idx);
1085 }
1086
1087 virtualUpdate();
1088 break;
1089 }
1090
1091 case MISCREG_ICC_BPR0:
1092 case MISCREG_ICC_BPR0_EL1: // Binary Point Register 0
1093 case MISCREG_ICC_BPR1:
1094 case MISCREG_ICC_BPR1_EL1: { // Binary Point Register 1
1095 if ((currEL() == EL1) && !inSecureState()) {
1096 if (misc_reg == MISCREG_ICC_BPR0_EL1 && hcr_fmo) {
1097 return setMiscReg(MISCREG_ICV_BPR0_EL1, val);
1098 } else if (misc_reg == MISCREG_ICC_BPR1_EL1 && hcr_imo) {
1099 return setMiscReg(MISCREG_ICV_BPR1_EL1, val);
1100 }
1101 }
1102
1103 Gicv3::GroupId group =
1104 misc_reg == MISCREG_ICC_BPR0_EL1 ? Gicv3::G0S : Gicv3::G1S;
1105
1106 if (group == Gicv3::G1S && !inSecureState()) {
1107 group = Gicv3::G1NS;
1108 }
1109
1110 if ((group == Gicv3::G1S) &&
1111 !isEL3OrMon() &&
1112 (isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S) &
1113 ICC_CTLR_EL1_CBPR)) {
1114 group = Gicv3::G0S;
1115 }
1116
1117 if ((group == Gicv3::G1NS) &&
1118 (currEL() < EL3) &&
1119 (isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS) &
1120 ICC_CTLR_EL1_CBPR)) {
1121 // Reads return BPR0 + 1 saturated to 7, WI
1122 return;
1123 }
1124
1125 uint8_t min_val = (group == Gicv3::G1NS) ?
1126 GIC_MIN_BPR_NS : GIC_MIN_BPR;
1127 val &= 0x7;
1128
1129 if (val < min_val) {
1130 val = min_val;
1131 }
1132
1133 break;
1134 }
1135
1136 case MISCREG_ICV_BPR0_EL1:
1137 case MISCREG_ICV_BPR1_EL1: {
1138 Gicv3::GroupId group =
1139 misc_reg == MISCREG_ICV_BPR0_EL1 ? Gicv3::G0S : Gicv3::G1NS;
1140 RegVal ich_vmcr_el2 =
1141 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1142
1143 if (group == Gicv3::G1NS && (ich_vmcr_el2 & ICH_VMCR_EL2_VCBPR)) {
1144 // reads return bpr0 + 1 saturated to 7, writes ignored
1145 return;
1146 }
1147
1148 uint8_t min_VPBR = 7 - VIRTUAL_PREEMPTION_BITS;
1149
1150 if (group != Gicv3::G0S) {
1151 min_VPBR++;
1152 }
1153
1154 if (val < min_VPBR) {
1155 val = min_VPBR;
1156 }
1157
1158 if (group == Gicv3::G0S) {
1159 ich_vmcr_el2 = insertBits(ich_vmcr_el2,
1160 ICH_VMCR_EL2_VBPR0_SHIFT + 2, ICH_VMCR_EL2_VBPR0_SHIFT,
1161 val);
1162 } else {
1163 ich_vmcr_el2 = insertBits(ich_vmcr_el2,
1164 ICH_VMCR_EL2_VBPR1_SHIFT + 2, ICH_VMCR_EL2_VBPR1_SHIFT,
1165 val);
1166 }
1167
1168 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1169 do_virtual_update = true;
1170 break;
1171 }
1172
1173 case MISCREG_ICC_CTLR:
1174 case MISCREG_ICC_CTLR_EL1: { // Control Register
1175 if ((currEL() == EL1) && !inSecureState() &&
1176 (hcr_imo || hcr_fmo)) {
1177 return setMiscReg(MISCREG_ICV_CTLR_EL1, val);
1178 }
1179
1180 /*
1181 * RSS is RO.
1182 * A3V is RO.
1183 * SEIS is RO.
1184 * IDbits is RO.
1185 * PRIbits is RO.
1186 * If EL3 is implemented and GICD_CTLR.DS == 0, then PMHE is RO.
1187 * So, only CBPR[0] and EOIMODE[1] are RW.
1188 * If EL3 is implemented and GICD_CTLR.DS == 0, then CBPR is RO.
1189 */
1190 uint64_t mask;
1191
1192 if (haveEL(EL3) and distributor->DS == 0) {
1193 mask = ICC_CTLR_EL1_EOIMODE;
1194 } else if (haveEL(EL3) and distributor->DS == 1) {
1195 mask = ICC_CTLR_EL1_PMHE | ICC_CTLR_EL1_CBPR |
1196 ICC_CTLR_EL1_EOIMODE;
1197 } else {
1198 mask = ICC_CTLR_EL1_CBPR | ICC_CTLR_EL1_EOIMODE;
1199 }
1200
1201 RegVal old_val =
1202 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1);
1203 old_val &= ~mask;
1204 val = old_val | (val & mask);
1205 break;
1206 }
1207
1208 case MISCREG_ICV_CTLR_EL1: {
1209 RegVal ich_vmcr_el2 =
1210 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1211 ich_vmcr_el2 = insertBits(ich_vmcr_el2, ICH_VMCR_EL2_VCBPR_SHIFT,
1212 val & ICC_CTLR_EL1_CBPR ? 1 : 0);
1213 ich_vmcr_el2 = insertBits(ich_vmcr_el2, ICH_VMCR_EL2_VEOIM_SHIFT,
1214 val & ICC_CTLR_EL1_EOIMODE ? 1 : 0);
1215 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1216 do_virtual_update = true;
1217 break;
1218 }
1219
1220 case MISCREG_ICC_MCTLR:
1221 case MISCREG_ICC_CTLR_EL3: {
1222 RegVal icc_ctlr_el1_s =
1223 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S);
1224 RegVal icc_ctlr_el1_ns =
1225 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS);
1226
1227 // ICC_CTLR_EL1(NS).EOImode is an alias of
1228 // ICC_CTLR_EL3.EOImode_EL1NS
1229 if (val & ICC_CTLR_EL3_EOIMODE_EL1NS) {
1230 icc_ctlr_el1_ns |= ICC_CTLR_EL1_EOIMODE;
1231 } else {
1232 icc_ctlr_el1_ns &= ~ICC_CTLR_EL1_EOIMODE;
1233 }
1234
1235 // ICC_CTLR_EL1(NS).CBPR is an alias of ICC_CTLR_EL3.CBPR_EL1NS
1236 if (val & ICC_CTLR_EL3_CBPR_EL1NS) {
1237 icc_ctlr_el1_ns |= ICC_CTLR_EL1_CBPR;
1238 } else {
1239 icc_ctlr_el1_ns &= ~ICC_CTLR_EL1_CBPR;
1240 }
1241
1242 // ICC_CTLR_EL1(S).EOImode is an alias of ICC_CTLR_EL3.EOImode_EL1S
1243 if (val & ICC_CTLR_EL3_EOIMODE_EL1S) {
1244 icc_ctlr_el1_s |= ICC_CTLR_EL1_EOIMODE;
1245 } else {
1246 icc_ctlr_el1_s &= ~ICC_CTLR_EL1_EOIMODE;
1247 }
1248
1249 // ICC_CTLR_EL1(S).CBPR is an alias of ICC_CTLR_EL3.CBPR_EL1S
1250 if (val & ICC_CTLR_EL3_CBPR_EL1S) {
1251 icc_ctlr_el1_s |= ICC_CTLR_EL1_CBPR;
1252 } else {
1253 icc_ctlr_el1_s &= ~ICC_CTLR_EL1_CBPR;
1254 }
1255
1256 isa->setMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S, icc_ctlr_el1_s);
1257 isa->setMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS, icc_ctlr_el1_ns);
1258 // Only ICC_CTLR_EL3_EOIMODE_EL3 is writable
1259 RegVal old_icc_ctlr_el3 =
1260 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3);
1261 old_icc_ctlr_el3 &= ~(ICC_CTLR_EL3_EOIMODE_EL3 | ICC_CTLR_EL3_RM);
1262 val = old_icc_ctlr_el3 |
1263 (val & (ICC_CTLR_EL3_EOIMODE_EL3 | ICC_CTLR_EL3_RM));
1264 break;
1265 }
1266
1267 case MISCREG_ICC_PMR:
1268 case MISCREG_ICC_PMR_EL1: { // Priority Mask Register
1269 if ((currEL() == EL1) && !inSecureState() &&
1270 (hcr_imo || hcr_fmo)) {
1271 return isa->setMiscRegNoEffect(MISCREG_ICV_PMR_EL1, val);
1272 }
1273
1274 val &= 0xff;
1275 SCR scr_el3 = isa->readMiscRegNoEffect(MISCREG_SCR_EL3);
1276
1277 if (haveEL(EL3) && !inSecureState() && (scr_el3.fiq)) {
1278 /*
1279 * NS access and Group 0 is inaccessible to NS: return the
1280 * NS view of the current priority
1281 */
1282 RegVal old_icc_pmr_el1 =
1283 isa->readMiscRegNoEffect(MISCREG_ICC_PMR_EL1);
1284
1285 if (!(old_icc_pmr_el1 & 0x80)) {
1286 /* Current PMR in the secure range, don't allow NS to
1287 * change it */
1288 return;
1289 }
1290
1291 val = (val >> 1) | 0x80;
1292 }
1293
1294 val &= ~0U << (8 - PRIORITY_BITS);
1295 break;
1296 }
1297
1298 case MISCREG_ICC_IGRPEN0:
1299 case MISCREG_ICC_IGRPEN0_EL1: { // Interrupt Group 0 Enable Register
1300 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
1301 return setMiscReg(MISCREG_ICV_IGRPEN0_EL1, val);
1302 }
1303
1304 break;
1305 }
1306
1307 case MISCREG_ICV_IGRPEN0_EL1: {
1308 bool enable = val & 0x1;
1309 RegVal ich_vmcr_el2 =
1310 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1311 ich_vmcr_el2 = insertBits(ich_vmcr_el2,
1312 ICH_VMCR_EL2_VENG0_SHIFT, enable);
1313 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1314 virtualUpdate();
1315 return;
1316 }
1317
1318 case MISCREG_ICC_IGRPEN1:
1319 case MISCREG_ICC_IGRPEN1_EL1: { // Interrupt Group 1 Enable Register
1320 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
1321 return setMiscReg(MISCREG_ICV_IGRPEN1_EL1, val);
1322 }
1323
1324 break;
1325 }
1326
1327 case MISCREG_ICV_IGRPEN1_EL1: {
1328 bool enable = val & 0x1;
1329 RegVal ich_vmcr_el2 =
1330 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1331 ich_vmcr_el2 = insertBits(ich_vmcr_el2,
1332 ICH_VMCR_EL2_VENG1_SHIFT, enable);
1333 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1334 virtualUpdate();
1335 return;
1336 }
1337
1338 case MISCREG_ICC_MGRPEN1:
1339 case MISCREG_ICC_IGRPEN1_EL3: {
1340 // EnableGrp1S and EnableGrp1NS are aliased with
1341 // ICC_IGRPEN1_EL1_S.Enable and ICC_IGRPEN1_EL1_NS.Enable
1342 bool enable_grp_1s = val & ICC_IGRPEN1_EL3_ENABLEGRP1S;
1343 bool enable_grp_1ns = val & ICC_IGRPEN1_EL3_ENABLEGRP1NS;
1344 isa->setMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1_S, enable_grp_1s);
1345 isa->setMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1_NS, enable_grp_1ns);
1346 return;
1347 }
1348
1349 // Software Generated Interrupt Group 0 Register
1350 case MISCREG_ICC_SGI0R:
1351 case MISCREG_ICC_SGI0R_EL1:
1352
1353 // Software Generated Interrupt Group 1 Register
1354 case MISCREG_ICC_SGI1R:
1355 case MISCREG_ICC_SGI1R_EL1:
1356
1357 // Alias Software Generated Interrupt Group 1 Register
1358 case MISCREG_ICC_ASGI1R:
1359 case MISCREG_ICC_ASGI1R_EL1: {
1360 bool ns = !inSecureState();
1361 Gicv3::GroupId group;
1362
1363 if (misc_reg == MISCREG_ICC_SGI1R_EL1) {
1364 group = ns ? Gicv3::G1NS : Gicv3::G1S;
1365 } else if (misc_reg == MISCREG_ICC_ASGI1R_EL1) {
1366 group = ns ? Gicv3::G1S : Gicv3::G1NS;
1367 } else {
1368 group = Gicv3::G0S;
1369 }
1370
1371 if (distributor->DS && group == Gicv3::G1S) {
1372 group = Gicv3::G0S;
1373 }
1374
1375 uint8_t aff3 = bits(val, 55, 48);
1376 uint8_t aff2 = bits(val, 39, 32);
1377 uint8_t aff1 = bits(val, 23, 16);;
1378 uint16_t target_list = bits(val, 15, 0);
1379 uint32_t int_id = bits(val, 27, 24);
1380 bool irm = bits(val, 40, 40);
1381 uint8_t rs = bits(val, 47, 44);
1382
1383 for (int i = 0; i < gic->getSystem()->numContexts(); i++) {
1384 Gicv3Redistributor * redistributor_i =
1385 gic->getRedistributor(i);
1386 uint32_t affinity_i = redistributor_i->getAffinity();
1387
1388 if (irm) {
1389 // Interrupts routed to all PEs in the system,
1390 // excluding "self"
1391 if (affinity_i == redistributor->getAffinity()) {
1392 continue;
1393 }
1394 } else {
1395 // Interrupts routed to the PEs specified by
1396 // Aff3.Aff2.Aff1.<target list>
1397 if ((affinity_i >> 8) !=
1398 ((aff3 << 16) | (aff2 << 8) | (aff1 << 0))) {
1399 continue;
1400 }
1401
1402 uint8_t aff0_i = bits(affinity_i, 7, 0);
1403
1404 if (!(aff0_i >= rs * 16 && aff0_i < (rs + 1) * 16 &&
1405 ((0x1 << (aff0_i - rs * 16)) & target_list))) {
1406 continue;
1407 }
1408 }
1409
1410 redistributor_i->sendSGI(int_id, group, ns);
1411 }
1412
1413 break;
1414 }
1415
1416 case MISCREG_ICC_SRE:
1417 case MISCREG_ICC_SRE_EL1: { // System Register Enable Register EL1
1418 if (!(val & ICC_SRE_EL1_SRE)) {
1419 warn("Gicv3CPUInterface::setMiscReg(): "
1420 "ICC_SRE_EL*.SRE is RAO/WI, legacy not supported!\n");
1421 }
1422
1423 bool dfb = val & ICC_SRE_EL1_DFB;
1424 bool dib = val & ICC_SRE_EL1_DIB;
1425
1426 if (haveEL(EL3) && !distributor->DS) {
1427 // DIB is RO alias of ICC_SRE_EL3.DIB
1428 // DFB is RO alias of ICC_SRE_EL3.DFB
1429 } else if (haveEL(EL3) && distributor->DS) {
1430 // DIB is RW alias of ICC_SRE_EL3.DIB
1431 // DFB is RW alias of ICC_SRE_EL3.DFB
1432 RegVal icc_sre_el3 =
1433 isa->readMiscRegNoEffect(MISCREG_ICC_SRE_EL3);
1434 icc_sre_el3 = insertBits(icc_sre_el3, ICC_SRE_EL3_DFB, dfb);
1435 icc_sre_el3 = insertBits(icc_sre_el3, ICC_SRE_EL3_DIB, dib);
1436 isa->setMiscRegNoEffect(MISCREG_ICC_SRE_EL3, icc_sre_el3);
1437 } else if ((!haveEL(EL3) || distributor->DS) and haveEL(EL2)) {
1438 // DIB is RO alias of ICC_SRE_EL2.DIB
1439 // DFB is RO alias of ICC_SRE_EL2.DFB
1440 } else {
1441 isa->setMiscRegNoEffect(misc_reg, val);
1442 }
1443
1444 return;
1445 }
1446
1447 case MISCREG_ICC_HSRE:
1448 case MISCREG_ICC_SRE_EL2: // System Register Enable Register EL2
1449 case MISCREG_ICC_MSRE:
1450 case MISCREG_ICC_SRE_EL3: // System Register Enable Register EL3
1451 if (!(val & (1 << 0))) {
1452 warn("Gicv3CPUInterface::setMiscReg(): "
1453 "ICC_SRE_EL*.SRE is RAO/WI, legacy not supported!\n");
1454 }
1455
1456 // All bits are RAO/WI
1457 break;
1458
1459 case MISCREG_ICH_HCR:
1460 case MISCREG_ICH_HCR_EL2:
1461 val &= ICH_HCR_EL2_EN | ICH_HCR_EL2_UIE | ICH_HCR_EL2_LRENPIE |
1462 ICH_HCR_EL2_NPIE | ICH_HCR_EL2_VGRP0EIE |
1463 ICH_HCR_EL2_VGRP0DIE | ICH_HCR_EL2_VGRP1EIE |
1464 ICH_HCR_EL2_VGRP1DIE | ICH_HCR_EL2_TC | ICH_HCR_EL2_TALL0 |
1465 ICH_HCR_EL2_TALL1 | ICH_HCR_EL2_TDIR |
1466 ICH_HCR_EL2_EOICOUNT_MASK;
1467 do_virtual_update = true;
1468 break;
1469
1470 case MISCREG_ICH_LRC0 ... MISCREG_ICH_LRC15:
1471 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 high half part)
1472 {
1473 // Enforce RES0 bits in priority field, 5 of 8 bits used
1474 val = insertBits(val, ICH_LRC_PRIORITY_SHIFT + 2,
1475 ICH_LRC_PRIORITY_SHIFT, 0);
1476 RegVal old_val = isa->readMiscRegNoEffect(misc_reg);
1477 val = (old_val & 0xffffffff) | (val << 32);
1478 do_virtual_update = true;
1479 break;
1480 }
1481
1482 case MISCREG_ICH_LR0 ... MISCREG_ICH_LR15: {
1483 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 low half part)
1484 RegVal old_val = isa->readMiscRegNoEffect(misc_reg);
1485 val = (old_val & 0xffffffff00000000) | (val & 0xffffffff);
1486 do_virtual_update = true;
1487 break;
1488 }
1489
1490 case MISCREG_ICH_LR0_EL2 ... MISCREG_ICH_LR15_EL2: { // AArch64
1491 // Enforce RES0 bits in priority field, 5 of 8 bits used
1492 val = insertBits(val, ICH_LR_EL2_PRIORITY_SHIFT + 2,
1493 ICH_LR_EL2_PRIORITY_SHIFT, 0);
1494 do_virtual_update = true;
1495 break;
1496 }
1497
1498 case MISCREG_ICH_VMCR:
1499 case MISCREG_ICH_VMCR_EL2: {
1500 val &= ICH_VMCR_EL2_VENG0 | ICH_VMCR_EL2_VENG1 |
1501 ICH_VMCR_EL2_VCBPR | ICH_VMCR_EL2_VEOIM |
1502 ICH_VMCR_EL2_VBPR1_MASK | ICH_VMCR_EL2_VBPR0_MASK |
1503 ICH_VMCR_EL2_VPMR_MASK;
1504 val |= ICH_VMCR_EL2_VFIQEN; // RES1
1505 // Check VBPRs against minimun allowed value
1506 uint8_t vbpr0 = bits(val, 23, 21);
1507 uint8_t vbpr1 = bits(val, 20, 18);
1508 uint8_t min_vpr0 = 7 - VIRTUAL_PREEMPTION_BITS;
1509 uint8_t min_vpr1 = min_vpr0 + 1;
1510 vbpr0 = vbpr0 < min_vpr0 ? min_vpr0 : vbpr0;
1511 vbpr1 = vbpr1 < min_vpr1 ? min_vpr1 : vbpr1;
1512 val = insertBits(val, ICH_VMCR_EL2_VBPR0_SHIFT + 2,
1513 ICH_VMCR_EL2_VBPR0_SHIFT, vbpr0);
1514 val = insertBits(val, ICH_VMCR_EL2_VBPR1_SHIFT + 2,
1515 ICH_VMCR_EL2_VBPR1_SHIFT, vbpr1);
1516 break;
1517 }
1518
1519 case MISCREG_ICH_AP0R0 ... MISCREG_ICH_AP0R3:
1520 case MISCREG_ICH_AP0R0_EL2 ... MISCREG_ICH_AP0R3_EL2:
1521 case MISCREG_ICH_AP1R0 ... MISCREG_ICH_AP1R3:
1522 case MISCREG_ICH_AP1R0_EL2 ... MISCREG_ICH_AP1R3_EL2:
1523 break;
1524
1525 default:
1526 panic("Gicv3CPUInterface::setMiscReg(): "
1527 "unknown register %d (%s)",
1528 misc_reg, miscRegName[misc_reg]);
1529 }
1530
1531 isa->setMiscRegNoEffect(misc_reg, val);
1532
1533 if (do_virtual_update) {
1534 virtualUpdate();
1535 }
1536}
1537
1538int
1539Gicv3CPUInterface::virtualFindActive(uint32_t int_id)
1540{
1541 for (uint32_t lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) {
1542 RegVal lr =
1543 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
1544 uint32_t lr_intid = bits(lr, 31, 0);
1545
1546 if ((lr & ICH_LR_EL2_STATE_ACTIVE_BIT) && lr_intid == int_id) {
1547 return lr_idx;
1548 }
1549 }
1550
1551 return -1;
1552}
1553
1554uint32_t
1555Gicv3CPUInterface::getHPPIR0()
1556{
1557 if (hppi.prio == 0xff) {
1558 return Gicv3::INTID_SPURIOUS;
1559 }
1560
1561 bool irq_is_secure = !distributor->DS && hppi.group != Gicv3::G1NS;
1562
1563 if ((hppi.group != Gicv3::G0S) && isEL3OrMon()) {
1564 /* Indicate to EL3 that there's a Group 1 interrupt for the
1565 * other state pending.
1566 */
1567 return irq_is_secure ? Gicv3::INTID_SECURE : Gicv3::INTID_NONSECURE;
1568 }
1569
1570 if ((hppi.group != Gicv3::G0S)) { // && !isEL3OrMon())
1571 return Gicv3::INTID_SPURIOUS;
1572 }
1573
1574 if (irq_is_secure && !inSecureState()) {
1575 // Secure interrupts not visible in Non-secure
1576 return Gicv3::INTID_SPURIOUS;
1577 }
1578
1579 return hppi.intid;
1580}
1581
1582uint32_t
1583Gicv3CPUInterface::getHPPIR1()
1584{
1585 if (hppi.prio == 0xff) {
1586 return Gicv3::INTID_SPURIOUS;
1587 }
1588
1589 //if ((currEL() == EL3) && ICC_CTLR_EL3_RM)
1590 if ((currEL() == EL3) &&
1591 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3) & ICC_CTLR_EL3_RM) {
1592 if (hppi.group == Gicv3::G0S) {
1593 return Gicv3::INTID_SECURE;
1594 } else if (hppi.group == Gicv3::G1NS) {
1595 return Gicv3::INTID_NONSECURE;
1596 }
1597 }
1598
1599 if (hppi.group == Gicv3::G0S) {
1600 return Gicv3::INTID_SPURIOUS;
1601 }
1602
1603 bool irq_is_secure = (distributor->DS == 0) && (hppi.group != Gicv3::G1NS);
1604
1605 if (irq_is_secure) {
1606 if (!inSecureState()) {
1607 // Secure interrupts not visible in Non-secure
1608 return Gicv3::INTID_SPURIOUS;
1609 }
1610 } else if (!isEL3OrMon() && inSecureState()) {
1611 // Group 1 non-secure interrupts not visible in Secure EL1
1612 return Gicv3::INTID_SPURIOUS;
1613 }
1614
1615 return hppi.intid;
1616}
1617
1618void
1619Gicv3CPUInterface::dropPriority(Gicv3::GroupId group)
1620{
1621 int apr_misc_reg;
1622 RegVal apr;
1623 apr_misc_reg = group == Gicv3::G0S ?
1624 MISCREG_ICC_AP0R0_EL1 : MISCREG_ICC_AP1R0_EL1;
1625 apr = isa->readMiscRegNoEffect(apr_misc_reg);
1626
1627 if (apr) {
1628 /* Clear the lowest set bit */
1629 apr &= apr - 1;
1630 isa->setMiscRegNoEffect(apr_misc_reg, apr);
1631 }
1632
1633 update();
1634}
1635
1636uint8_t
1637Gicv3CPUInterface::virtualDropPriority()
1638{
1639 /* Drop the priority of the currently active virtual interrupt
1640 * (favouring group 0 if there is a set active bit at
1641 * the same priority for both group 0 and group 1).
1642 * Return the priority value for the bit we just cleared,
1643 * or 0xff if no bits were set in the AP registers at all.
1644 * Note that though the ich_apr[] are uint64_t only the low
1645 * 32 bits are actually relevant.
1646 */
1647 int apr_max = 1 << (VIRTUAL_PREEMPTION_BITS - 5);
1648
1649 for (int i = 0; i < apr_max; i++) {
1650 RegVal vapr0 = isa->readMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i);
1651 RegVal vapr1 = isa->readMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i);
1652
1653 if (!vapr0 && !vapr1) {
1654 continue;
1655 }
1656
1657 int vapr0_count = ctz32(vapr0);
1658 int vapr1_count = ctz32(vapr1);
1659
1660 if (vapr0_count <= vapr1_count) {
1661 /* Clear the lowest set bit */
1662 vapr0 &= vapr0 - 1;
1663 isa->setMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i, vapr0);
1664 return (vapr0_count + i * 32) << (GIC_MIN_VBPR + 1);
1665 } else {
1666 /* Clear the lowest set bit */
1667 vapr1 &= vapr1 - 1;
1668 isa->setMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i, vapr1);
1669 return (vapr1_count + i * 32) << (GIC_MIN_VBPR + 1);
1670 }
1671 }
1672
1673 return 0xff;
1674}
1675
1676void
1677Gicv3CPUInterface::activateIRQ(uint32_t int_id, Gicv3::GroupId group)
1678{
1679 // Update active priority registers.
1680 uint32_t prio = hppi.prio & 0xf8;
1681 int apr_bit = prio >> (8 - PRIORITY_BITS);
1682 int reg_bit = apr_bit % 32;
1683 int apr_idx = group == Gicv3::G0S ?
1684 MISCREG_ICC_AP0R0_EL1 : MISCREG_ICC_AP1R0_EL1;
1685 RegVal apr = isa->readMiscRegNoEffect(apr_idx);
1686 apr |= (1 << reg_bit);
1687 isa->setMiscRegNoEffect(apr_idx, apr);
1688
1689 // Move interrupt state from pending to active.
1690 if (int_id < Gicv3::SGI_MAX + Gicv3::PPI_MAX) {
1691 // SGI or PPI, redistributor
1692 redistributor->activateIRQ(int_id);
1693 redistributor->updateAndInformCPUInterface();
1694 } else if (int_id < Gicv3::INTID_SECURE) {
1695 // SPI, distributor
1696 distributor->activateIRQ(int_id);
1697 distributor->updateAndInformCPUInterfaces();
1698 }
1699}
1700
1701void
1702Gicv3CPUInterface::virtualActivateIRQ(uint32_t lr_idx)
1703{
1704 // Update active priority registers.
1705 RegVal lr = isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 +
1706 lr_idx);
1707 Gicv3::GroupId group = lr & ICH_LR_EL2_GROUP ? Gicv3::G1NS : Gicv3::G0S;
1708 uint8_t prio = bits(lr, 55, 48) & 0xf8;
1709 int apr_bit = prio >> (8 - VIRTUAL_PREEMPTION_BITS);
1710 int reg_no = apr_bit / 32;
1711 int reg_bit = apr_bit % 32;
1712 int apr_idx = group == Gicv3::G0S ?
1713 MISCREG_ICH_AP0R0_EL2 + reg_no : MISCREG_ICH_AP1R0_EL2 + reg_no;
1714 RegVal apr = isa->readMiscRegNoEffect(apr_idx);
1715 apr |= (1 << reg_bit);
1716 isa->setMiscRegNoEffect(apr_idx, apr);
1717 // Move interrupt state from pending to active.
1718 lr &= ~ICH_LR_EL2_STATE_PENDING_BIT;
1719 lr |= ICH_LR_EL2_STATE_ACTIVE_BIT;
1720 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx, lr);
1721}
1722
1723void
1724Gicv3CPUInterface::deactivateIRQ(uint32_t int_id, Gicv3::GroupId group)
1725{
1726 if (int_id < Gicv3::SGI_MAX + Gicv3::PPI_MAX) {
1727 // SGI or PPI, redistributor
1728 redistributor->deactivateIRQ(int_id);
1729 redistributor->updateAndInformCPUInterface();
1730 } else if (int_id < Gicv3::INTID_SECURE) {
1731 // SPI, distributor
1732 distributor->deactivateIRQ(int_id);
1733 distributor->updateAndInformCPUInterfaces();
1734 } else {
1735 return;
1736 }
1737}
1738
1739void
1740Gicv3CPUInterface::virtualDeactivateIRQ(int lr_idx)
1741{
1742 RegVal lr = isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 +
1743 lr_idx);
1744
1745 if (lr & ICH_LR_EL2_HW) {
1746 // Deactivate the associated physical interrupt
1747 int pintid = bits(lr, 41, 32);
1748
1749 if (pintid < Gicv3::INTID_SECURE) {
1750 Gicv3::GroupId group =
1751 pintid >= 32 ? distributor->getIntGroup(pintid) :
1752 redistributor->getIntGroup(pintid);
1753 deactivateIRQ(pintid, group);
1754 }
1755 }
1756
1757 // Remove the active bit
1758 lr &= ~ICH_LR_EL2_STATE_ACTIVE_BIT;
1759 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx, lr);
1760}
1761
1762/*
1763 * Return a mask word which clears the subpriority bits from
1764 * a priority value for an interrupt in the specified group.
1765 * This depends on the BPR value. For CBPR0 (S or NS):
1766 * a BPR of 0 means the group priority bits are [7:1];
1767 * a BPR of 1 means they are [7:2], and so on down to
1768 * ...
1769 * a BPR of 7 meaning no group priority bits at all.
1770 * For CBPR1 NS:
1771 * a BPR of 0 is impossible (the minimum value is 1)
1772 * a BPR of 1 means the group priority bits are [7:1];
1773 * a BPR of 2 means they are [7:2], and so on down to
1774 * ...
1775 * a BPR of 7 meaning the group priority is [7].
1776 *
1777 * Which BPR to use depends on the group of the interrupt and
1778 * the current ICC_CTLR.CBPR settings.
1779 *
1780 * This corresponds to the GroupBits() pseudocode from 4.8.2.
1781 */
1782uint32_t
1783Gicv3CPUInterface::groupPriorityMask(Gicv3::GroupId group)
1784{
1785 if ((group == Gicv3::G1S &&
1786 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S)
1787 & ICC_CTLR_EL1_CBPR) ||
1788 (group == Gicv3::G1NS &&
1789 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS)
1790 & ICC_CTLR_EL1_CBPR)) {
1791 group = Gicv3::G0S;
1792 }
1793
1794 int bpr;
1795
1796 if (group == Gicv3::G0S) {
1797 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR0_EL1) & 0x7;
1798 } else {
1799 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR1_EL1) & 0x7;
1800 }
1801
1802 if (group == Gicv3::G1NS) {
1803 assert(bpr > 0);
1804 bpr--;
1805 }
1806
1807 return ~0U << (bpr + 1);
1808}
1809
1810uint32_t
1811Gicv3CPUInterface::virtualGroupPriorityMask(Gicv3::GroupId group)
1812{
1813 RegVal ich_vmcr_el2 =
1814 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1815
1816 if (group == Gicv3::G1NS && (ich_vmcr_el2 & ICH_VMCR_EL2_VCBPR)) {
1817 group = Gicv3::G0S;
1818 }
1819
1820 int bpr;
1821
1822 if (group == Gicv3::G0S) {
1823 bpr = bits(ich_vmcr_el2, 23, 21);
1824 } else {
1825 bpr = bits(ich_vmcr_el2, 20, 18);
1826 }
1827
1828 if (group == Gicv3::G1NS) {
1829 assert(bpr > 0);
1830 bpr--;
1831 }
1832
1833 return ~0U << (bpr + 1);
1834}
1835
1836bool
1837Gicv3CPUInterface::isEOISplitMode()
1838{
1839 if (isEL3OrMon()) {
1840 return isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3) &
1841 ICC_CTLR_EL3_EOIMODE_EL3;
1842 } else {
1843 return isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1) &
1844 ICC_CTLR_EL1_EOIMODE;
1845 }
1846}
1847
1848bool
1849Gicv3CPUInterface::virtualIsEOISplitMode()
1850{
1851 RegVal ich_vmcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1852 return ich_vmcr_el2 & ICH_VMCR_EL2_VEOIM;
1853}
1854
1855int
1856Gicv3CPUInterface::highestActiveGroup()
1857{
1858 int g0_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP0R0_EL1));
1859 int gq_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_S));
1860 int g1nz_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_NS));
1861
1862 if (g1nz_ctz < g0_ctz && g1nz_ctz < gq_ctz) {
1863 return Gicv3::G1NS;
1864 }
1865
1866 if (gq_ctz < g0_ctz) {
1867 return Gicv3::G1S;
1868 }
1869
1870 if (g0_ctz < 32) {
1871 return Gicv3::G0S;
1872 }
1873
1874 return -1;
1875}
1876
1877void
1878Gicv3CPUInterface::update()
1879{
1880 bool signal_IRQ = false;
1881 bool signal_FIQ = false;
1882
1883 if (hppi.group == Gicv3::G1S && !haveEL(EL3)) {
1884 /*
1885 * Secure enabled GIC sending a G1S IRQ to a secure disabled
1886 * CPU -> send G0 IRQ
1887 */
1888 hppi.group = Gicv3::G0S;
1889 }
1890
1891 if (hppiCanPreempt()) {
1892 ArmISA::InterruptTypes int_type = intSignalType(hppi.group);
1893 DPRINTF(GIC, "Gicv3CPUInterface::update(): "
1894 "posting int as %d!\n", int_type);
1895 int_type == ArmISA::INT_IRQ ? signal_IRQ = true : signal_FIQ = true;
1896 }
1897
1898 if (signal_IRQ) {
1899 gic->postInt(cpuId, ArmISA::INT_IRQ);
1900 } else {
1901 gic->deassertInt(cpuId, ArmISA::INT_IRQ);
1902 }
1903
1904 if (signal_FIQ) {
1905 gic->postInt(cpuId, ArmISA::INT_FIQ);
1906 } else {
1907 gic->deassertInt(cpuId, ArmISA::INT_FIQ);
1908 }
1909}
1910
1911void
1912Gicv3CPUInterface::virtualUpdate()
1913{
1914 bool signal_IRQ = false;
1915 bool signal_FIQ = false;
1916 int lr_idx = getHPPVILR();
1917
1918 if (lr_idx >= 0) {
1919 RegVal ich_lr_el2 =
1920 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
1921
1922 if (hppviCanPreempt(lr_idx)) {
1923 if (ich_lr_el2 & ICH_LR_EL2_GROUP) {
1924 signal_IRQ = true;
1925 } else {
1926 signal_FIQ = true;
1927 }
1928 }
1929 }
1930
1931 RegVal ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
1932
1933 if (ich_hcr_el2 & ICH_HCR_EL2_EN) {
1934 if (maintenanceInterruptStatus()) {
1935 redistributor->sendPPInt(25);
1936 }
1937 }
1938
1939 if (signal_IRQ) {
1940 DPRINTF(GIC, "Gicv3CPUInterface::virtualUpdate(): "
1941 "posting int as %d!\n", ArmISA::INT_VIRT_IRQ);
1942 gic->postInt(cpuId, ArmISA::INT_VIRT_IRQ);
1943 } else {
1944 gic->deassertInt(cpuId, ArmISA::INT_VIRT_IRQ);
1945 }
1946
1947 if (signal_FIQ) {
1948 DPRINTF(GIC, "Gicv3CPUInterface::virtualUpdate(): "
1949 "posting int as %d!\n", ArmISA::INT_VIRT_FIQ);
1950 gic->postInt(cpuId, ArmISA::INT_VIRT_FIQ);
1951 } else {
1952 gic->deassertInt(cpuId, ArmISA::INT_VIRT_FIQ);
1953 }
1954}
1955
1956// Returns the intex of the LR with the HPPI
1957int
1958Gicv3CPUInterface::getHPPVILR()
1959{
1960 int idx = -1;
1961 RegVal ich_vmcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1962
1963 if (!(ich_vmcr_el2 & (ICH_VMCR_EL2_VENG0 | ICH_VMCR_EL2_VENG1))) {
1964 // VG0 and VG1 disabled...
1965 return idx;
1966 }
1967
1968 uint8_t highest_prio = 0xff;
1969
1970 for (int i = 0; i < 16; i++) {
1971 RegVal ich_lri_el2 =
1972 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + i);
1973 uint8_t state = bits(ich_lri_el2, 63, 62);
1974
1975 if (state != Gicv3::INT_PENDING) {
1976 continue;
1977 }
1978
1979 if (ich_lri_el2 & ICH_LR_EL2_GROUP) {
1980 // VG1
1981 if (!(ich_vmcr_el2 & ICH_VMCR_EL2_VENG1)) {
1982 continue;
1983 }
1984 } else {
1985 // VG0
1986 if (!(ich_vmcr_el2 & ICH_VMCR_EL2_VENG0)) {
1987 continue;
1988 }
1989 }
1990
1991 uint8_t prio = bits(ich_lri_el2, 55, 48);
1992
1993 if (prio < highest_prio) {
1994 highest_prio = prio;
1995 idx = i;
1996 }
1997 }
1998
1999 return idx;
2000}
2001
2002bool
2003Gicv3CPUInterface::hppviCanPreempt(int lr_idx)
2004{
2005 RegVal lr = isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
2006
2007 if (!(isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2) & ICH_HCR_EL2_EN)) {
2008 // virtual interface is disabled
2009 return false;
2010 }
2011
2012 uint8_t prio = bits(lr, 55, 48);
2013 uint8_t vpmr =
2014 bits(isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2), 31, 24);
2015
2016 if (prio >= vpmr) {
2017 // prioriry masked
2018 return false;
2019 }
2020
2021 uint8_t rprio = virtualHighestActivePriority();
2022
2023 if (rprio == 0xff) {
2024 return true;
2025 }
2026
2027 Gicv3::GroupId group = lr & ICH_LR_EL2_GROUP ? Gicv3::G1NS : Gicv3::G0S;
2028 uint32_t prio_mask = virtualGroupPriorityMask(group);
2029
2030 if ((prio & prio_mask) < (rprio & prio_mask)) {
2031 return true;
2032 }
2033
2034 return false;
2035}
2036
2037uint8_t
2038Gicv3CPUInterface::virtualHighestActivePriority()
2039{
2040 uint8_t num_aprs = 1 << (VIRTUAL_PRIORITY_BITS - 5);
2041
2042 for (int i = 0; i < num_aprs; i++) {
2043 RegVal vapr =
2044 isa->readMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i) |
2045 isa->readMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i);
2046
2047 if (!vapr) {
2048 continue;
2049 }
2050
2051 return (i * 32 + ctz32(vapr)) << (GIC_MIN_VBPR + 1);
2052 }
2053
2054 // no active interrups, return idle priority
2055 return 0xff;
2056}
2057
2058void
2059Gicv3CPUInterface::virtualIncrementEOICount()
2060{
2061 // Increment the EOICOUNT field in ICH_HCR_EL2
2062 RegVal ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
2063 uint32_t EOI_cout = bits(ich_hcr_el2, 31, 27);
2064 EOI_cout++;
2065 ich_hcr_el2 = insertBits(ich_hcr_el2, 31, 27, EOI_cout);
2066 isa->setMiscRegNoEffect(MISCREG_ICH_HCR_EL2, ich_hcr_el2);
2067}
2068
2069/*
2070 * Should we signal the interrupt as IRQ or FIQ?
2071 * see spec section 4.6.2
2072 */
2073ArmISA::InterruptTypes
2074Gicv3CPUInterface::intSignalType(Gicv3::GroupId group)
2075{
2076 bool is_fiq = false;
2077
2078 switch (group) {
2079 case Gicv3::G0S:
2080 is_fiq = true;
2081 break;
2082
2083 case Gicv3::G1S:
2084 is_fiq = (distributor->DS == 0) &&
2085 (!inSecureState() || ((currEL() == EL3) && isAA64()));
2086 break;
2087
2088 case Gicv3::G1NS:
2089 is_fiq = (distributor->DS == 0) && inSecureState();
2090 break;
2091
2092 default:
2093 panic("Gicv3CPUInterface::intSignalType(): invalid group!");
2094 }
2095
2096 if (is_fiq) {
2097 return ArmISA::INT_FIQ;
2098 } else {
2099 return ArmISA::INT_IRQ;
2100 }
2101}
2102
2103bool
2104Gicv3CPUInterface::hppiCanPreempt()
2105{
2106 if (hppi.prio == 0xff) {
2107 // there is no pending interrupt
2108 return false;
2109 }
2110
2111 if (!groupEnabled(hppi.group)) {
2112 // group disabled at CPU interface
2113 return false;
2114 }
2115
2116 if (hppi.prio >= isa->readMiscRegNoEffect(MISCREG_ICC_PMR_EL1)) {
2117 // priority masked
2118 return false;
2119 }
2120
2121 uint8_t rprio = highestActivePriority();
2122
2123 if (rprio == 0xff) {
2124 return true;
2125 }
2126
2127 uint32_t prio_mask = groupPriorityMask(hppi.group);
2128
2129 if ((hppi.prio & prio_mask) < (rprio & prio_mask)) {
2130 return true;
2131 }
2132
2133 return false;
2134}
2135
2136uint8_t
2137Gicv3CPUInterface::highestActivePriority()
2138{
2139 uint32_t apr = isa->readMiscRegNoEffect(MISCREG_ICC_AP0R0_EL1) |
2140 isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_NS) |
2141 isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_S);
2142
2143 if (apr) {
2144 return ctz32(apr) << (GIC_MIN_BPR + 1);
2145 }
2146
2147 // no active interrups, return idle priority
2148 return 0xff;
2149}
2150
2151bool
2152Gicv3CPUInterface::groupEnabled(Gicv3::GroupId group)
2153{
2154 switch (group) {
2155 case Gicv3::G0S:
2156 return isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN0_EL1) &
2157 ICC_IGRPEN0_EL1_ENABLE;
2158
2159 case Gicv3::G1S:
2160 //if (distributor->DS)
2161 //{
2162 // return isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1_NS) &
2163 // ICC_IGRPEN1_EL1_ENABLE;
2164 //}
2165 //else
2166 //{
2167 return isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1_S) &
2168 ICC_IGRPEN1_EL1_ENABLE;
2169
2170 //}
2171
2172 case Gicv3::G1NS:
2173 return isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1_NS) &
2174 ICC_IGRPEN1_EL1_ENABLE;
2175
2176 default:
2177 panic("Gicv3CPUInterface::groupEnable(): invalid group!\n");
2178 }
2179}
2180
2181bool
2182Gicv3CPUInterface::inSecureState()
2183{
2184 if (!gic->getSystem()->haveSecurity()) {
2185 return false;
2186 }
2187
2188 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR);
2189 SCR scr = isa->readMiscRegNoEffect(MISCREG_SCR);
2190 return ArmISA::inSecureState(scr, cpsr);
2191}
2192
2193int
2194Gicv3CPUInterface::currEL()
2195{
2196 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR);
2197 bool is_64 = opModeIs64((OperatingMode)(uint8_t) cpsr.mode);
2198
2199 if (is_64) {
2200 return (ExceptionLevel)(uint8_t) cpsr.el;
2201 } else {
2202 switch (cpsr.mode) {
2203 case MODE_USER:
2204 return 0;
2205
2206 case MODE_HYP:
2207 return 2;
2208
2209 case MODE_MON:
2210 return 3;
2211
2212 default:
2213 return 1;
2214 }
2215 }
2216}
2217
2218bool
2219Gicv3CPUInterface::haveEL(ExceptionLevel el)
2220{
2221 switch (el) {
2222 case EL0:
2223 case EL1:
2224 return true;
2225
2226 case EL2:
2227 return gic->getSystem()->haveVirtualization();
2228
2229 case EL3:
2230 return gic->getSystem()->haveSecurity();
2231
2232 default:
2233 warn("Unimplemented Exception Level\n");
2234 return false;
2235 }
2236}
2237
2238bool
2239Gicv3CPUInterface::isSecureBelowEL3()
2240{
2241 SCR scr = isa->readMiscRegNoEffect(MISCREG_SCR_EL3);
2242 return haveEL(EL3) && scr.ns == 0;
2243}
2244
2245bool
2246Gicv3CPUInterface::isAA64()
2247{
2248 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR);
2249 return opModeIs64((OperatingMode)(uint8_t) cpsr.mode);
2250}
2251
2252bool
2253Gicv3CPUInterface::isEL3OrMon()
2254{
2255 if (haveEL(EL3)) {
2256 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR);
2257 bool is_64 = opModeIs64((OperatingMode)(uint8_t) cpsr.mode);
2258
2259 if (is_64 && (cpsr.el == EL3)) {
2260 return true;
2261 } else if (!is_64 && (cpsr.mode == MODE_MON)) {
2262 return true;
2263 }
2264 }
2265
2266 return false;
2267}
2268
2269uint32_t
2270Gicv3CPUInterface::eoiMaintenanceInterruptStatus(uint32_t * misr)
2271{
2272 /* Return a set of bits indicating the EOI maintenance interrupt status
2273 * for each list register. The EOI maintenance interrupt status is
2274 * 1 if LR.State == 0 && LR.HW == 0 && LR.EOI == 1
2275 * (see the GICv3 spec for the ICH_EISR_EL2 register).
2276 * If misr is not NULL then we should also collect the information
2277 * about the MISR.EOI, MISR.NP and MISR.U bits.
2278 */
2279 uint32_t value = 0;
2280 int valid_count = 0;
2281 bool seen_pending = false;
2282
2283 for (int lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) {
2284 RegVal lr = isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
2285
2286 if ((lr & (ICH_LR_EL2_STATE_MASK | ICH_LR_EL2_HW | ICH_LR_EL2_EOI)) ==
2287 ICH_LR_EL2_EOI) {
2288 value |= (1 << lr_idx);
2289 }
2290
2291 if ((lr & ICH_LR_EL2_STATE_MASK)) {
2292 valid_count++;
2293 }
2294
2295 if (bits(lr, ICH_LR_EL2_STATE_SHIFT + ICH_LR_EL2_STATE_LENGTH,
2296 ICH_LR_EL2_STATE_SHIFT) == ICH_LR_EL2_STATE_PENDING) {
2297 seen_pending = true;
2298 }
2299 }
2300
2301 if (misr) {
2302 RegVal ich_hcr_el2 =
2303 isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
2304
2305 if (valid_count < 2 && (ich_hcr_el2 & ICH_HCR_EL2_UIE)) {
2306 *misr |= ICH_MISR_EL2_U;
2307 }
2308
2309 if (!seen_pending && (ich_hcr_el2 & ICH_HCR_EL2_NPIE)) {
2310 *misr |= ICH_MISR_EL2_NP;
2311 }
2312
2313 if (value) {
2314 *misr |= ICH_MISR_EL2_EOI;
2315 }
2316 }
2317
2318 return value;
2319}
2320
2321uint32_t
2322Gicv3CPUInterface::maintenanceInterruptStatus()
2323{
2324 /* Return a set of bits indicating the maintenance interrupt status
2325 * (as seen in the ICH_MISR_EL2 register).
2326 */
2327 uint32_t value = 0;
2328 /* Scan list registers and fill in the U, NP and EOI bits */
2329 eoiMaintenanceInterruptStatus(&value);
2330 RegVal ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
2331 RegVal ich_vmcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
2332
2333 if (ich_hcr_el2 & (ICH_HCR_EL2_LRENPIE | ICH_HCR_EL2_EOICOUNT_MASK)) {
2334 value |= ICH_MISR_EL2_LRENP;
2335 }
2336
2337 if ((ich_hcr_el2 & ICH_HCR_EL2_VGRP0EIE) &&
2338 (ich_vmcr_el2 & ICH_VMCR_EL2_VENG0)) {
2339 value |= ICH_MISR_EL2_VGRP0E;
2340 }
2341
2342 if ((ich_hcr_el2 & ICH_HCR_EL2_VGRP0DIE) &&
2343 !(ich_vmcr_el2 & ICH_VMCR_EL2_VENG1)) {
2344 value |= ICH_MISR_EL2_VGRP0D;
2345 }
2346
2347 if ((ich_hcr_el2 & ICH_HCR_EL2_VGRP1EIE) &&
2348 (ich_vmcr_el2 & ICH_VMCR_EL2_VENG1)) {
2349 value |= ICH_MISR_EL2_VGRP1E;
2350 }
2351
2352 if ((ich_hcr_el2 & ICH_HCR_EL2_VGRP1DIE) &&
2353 !(ich_vmcr_el2 & ICH_VMCR_EL2_VENG1)) {
2354 value |= ICH_MISR_EL2_VGRP1D;
2355 }
2356
2357 return value;
2358}
2359
2360void
2361Gicv3CPUInterface::serialize(CheckpointOut & cp) const
2362{
2363 SERIALIZE_SCALAR(hppi.intid);
2364 SERIALIZE_SCALAR(hppi.prio);
2365 SERIALIZE_ENUM(hppi.group);
2366}
2367
2368void
2369Gicv3CPUInterface::unserialize(CheckpointIn & cp)
2370{
2371 UNSERIALIZE_SCALAR(hppi.intid);
2372 UNSERIALIZE_SCALAR(hppi.prio);
2373 UNSERIALIZE_ENUM(hppi.group);
2374}
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