1/*
| 1/*
|
| 2 * Copyright (c) 2019 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
|
2 * Copyright (c) 2018 Metempsy Technology Consulting
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Jairo Balart
29 */
30
31#include "dev/arm/gic_v3_cpu_interface.hh"
32
33#include "arch/arm/isa.hh"
34#include "debug/GIC.hh"
35#include "dev/arm/gic_v3.hh"
36#include "dev/arm/gic_v3_distributor.hh"
37#include "dev/arm/gic_v3_redistributor.hh"
38
39const uint8_t Gicv3CPUInterface::GIC_MIN_BPR;
40const uint8_t Gicv3CPUInterface::GIC_MIN_BPR_NS;
41
42Gicv3CPUInterface::Gicv3CPUInterface(Gicv3 * gic, uint32_t cpu_id)
43 : BaseISADevice(),
44 gic(gic),
45 redistributor(nullptr),
46 distributor(nullptr),
47 cpuId(cpu_id)
48{
49}
50
51void
52Gicv3CPUInterface::init()
53{
54 redistributor = gic->getRedistributor(cpuId);
55 distributor = gic->getDistributor();
56}
57
58void
59Gicv3CPUInterface::initState()
60{
61 reset();
62}
63
64void
65Gicv3CPUInterface::reset()
66{
67 hppi.prio = 0xff;
68}
69
70void
71Gicv3CPUInterface::setThreadContext(ThreadContext *tc)
72{
73 maintenanceInterrupt = gic->params()->maint_int->get(tc);
74}
75
76bool
77Gicv3CPUInterface::getHCREL2FMO() const
78{
79 HCR hcr = isa->readMiscRegNoEffect(MISCREG_HCR_EL2);
80
81 if (hcr.tge && hcr.e2h) {
82 return false;
83 } else if (hcr.tge) {
84 return true;
85 } else {
86 return hcr.fmo;
87 }
88}
89
90bool
91Gicv3CPUInterface::getHCREL2IMO() const
92{
93 HCR hcr = isa->readMiscRegNoEffect(MISCREG_HCR_EL2);
94
95 if (hcr.tge && hcr.e2h) {
96 return false;
97 } else if (hcr.tge) {
98 return true;
99 } else {
100 return hcr.imo;
101 }
102}
103
104RegVal
105Gicv3CPUInterface::readMiscReg(int misc_reg)
106{
107 RegVal value = isa->readMiscRegNoEffect(misc_reg);
108 bool hcr_fmo = getHCREL2FMO();
109 bool hcr_imo = getHCREL2IMO();
110
111 switch (misc_reg) {
112 // Active Priorities Group 1 Registers
113 case MISCREG_ICC_AP1R0:
114 case MISCREG_ICC_AP1R0_EL1: {
115 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
116 return isa->readMiscRegNoEffect(MISCREG_ICV_AP1R0_EL1);
117 }
118
119 break;
120 }
121
122 case MISCREG_ICC_AP1R1:
123 case MISCREG_ICC_AP1R1_EL1:
124
125 // only implemented if supporting 6 or more bits of priority
126 case MISCREG_ICC_AP1R2:
127 case MISCREG_ICC_AP1R2_EL1:
128
129 // only implemented if supporting 7 or more bits of priority
130 case MISCREG_ICC_AP1R3:
131 case MISCREG_ICC_AP1R3_EL1:
132 // only implemented if supporting 7 or more bits of priority
133 return 0;
134
135 // Active Priorities Group 0 Registers
136 case MISCREG_ICC_AP0R0:
137 case MISCREG_ICC_AP0R0_EL1: {
138 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
139 return isa->readMiscRegNoEffect(MISCREG_ICV_AP0R0_EL1);
140 }
141
142 break;
143 }
144
145 case MISCREG_ICC_AP0R1:
146 case MISCREG_ICC_AP0R1_EL1:
147
148 // only implemented if supporting 6 or more bits of priority
149 case MISCREG_ICC_AP0R2:
150 case MISCREG_ICC_AP0R2_EL1:
151
152 // only implemented if supporting 7 or more bits of priority
153 case MISCREG_ICC_AP0R3:
154 case MISCREG_ICC_AP0R3_EL1:
155 // only implemented if supporting 7 or more bits of priority
156 return 0;
157
158 // Interrupt Group 0 Enable register EL1
159 case MISCREG_ICC_IGRPEN0:
160 case MISCREG_ICC_IGRPEN0_EL1: {
161 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
162 return readMiscReg(MISCREG_ICV_IGRPEN0_EL1);
163 }
164
165 break;
166 }
167
168 case MISCREG_ICV_IGRPEN0_EL1: {
169 ICH_VMCR_EL2 ich_vmcr_el2 =
170 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
171 value = ich_vmcr_el2.VENG0;
172 break;
173 }
174
175 // Interrupt Group 1 Enable register EL1
176 case MISCREG_ICC_IGRPEN1:
177 case MISCREG_ICC_IGRPEN1_EL1: {
178 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
179 return readMiscReg(MISCREG_ICV_IGRPEN1_EL1);
180 }
181
182 break;
183 }
184
185 case MISCREG_ICV_IGRPEN1_EL1: {
186 ICH_VMCR_EL2 ich_vmcr_el2 =
187 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
188 value = ich_vmcr_el2.VENG1;
189 break;
190 }
191
192 // Interrupt Group 1 Enable register EL3
193 case MISCREG_ICC_MGRPEN1:
194 case MISCREG_ICC_IGRPEN1_EL3:
195 break;
196
197 // Running Priority Register
198 case MISCREG_ICC_RPR:
199 case MISCREG_ICC_RPR_EL1: {
200 if ((currEL() == EL1) && !inSecureState() &&
201 (hcr_imo || hcr_fmo)) {
202 return readMiscReg(MISCREG_ICV_RPR_EL1);
203 }
204
205 uint8_t rprio = highestActivePriority();
206
207 if (haveEL(EL3) && !inSecureState() &&
208 (isa->readMiscRegNoEffect(MISCREG_SCR_EL3) & (1U << 2))) {
209 // Spec section 4.8.1
210 // For Non-secure access to ICC_RPR_EL1 when SCR_EL3.FIQ == 1
211 if ((rprio & 0x80) == 0) {
212 // If the current priority mask value is in the range of
213 // 0x00-0x7F a read access returns the value 0x0
214 rprio = 0;
215 } else if (rprio != 0xff) {
216 // If the current priority mask value is in the range of
217 // 0x80-0xFF a read access returns the Non-secure read of
218 // the current value
219 rprio = (rprio << 1) & 0xff;
220 }
221 }
222
223 value = rprio;
224 break;
225 }
226
227 // Virtual Running Priority Register
228 case MISCREG_ICV_RPR_EL1: {
229 value = virtualHighestActivePriority();
230 break;
231 }
232
233 // Highest Priority Pending Interrupt Register 0
234 case MISCREG_ICC_HPPIR0:
235 case MISCREG_ICC_HPPIR0_EL1: {
236 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
237 return readMiscReg(MISCREG_ICV_HPPIR0_EL1);
238 }
239
240 value = getHPPIR0();
241 break;
242 }
243
244 // Virtual Highest Priority Pending Interrupt Register 0
245 case MISCREG_ICV_HPPIR0_EL1: {
246 value = Gicv3::INTID_SPURIOUS;
247 int lr_idx = getHPPVILR();
248
249 if (lr_idx >= 0) {
250 ICH_LR_EL2 ich_lr_el2 =
251 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
252 Gicv3::GroupId group =
253 ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S;
254
255 if (group == Gicv3::G0S) {
256 value = ich_lr_el2.vINTID;
257 }
258 }
259
260 break;
261 }
262
263 // Highest Priority Pending Interrupt Register 1
264 case MISCREG_ICC_HPPIR1:
265 case MISCREG_ICC_HPPIR1_EL1: {
266 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
267 return readMiscReg(MISCREG_ICV_HPPIR1_EL1);
268 }
269
270 value = getHPPIR1();
271 break;
272 }
273
274 // Virtual Highest Priority Pending Interrupt Register 1
275 case MISCREG_ICV_HPPIR1_EL1: {
276 value = Gicv3::INTID_SPURIOUS;
277 int lr_idx = getHPPVILR();
278
279 if (lr_idx >= 0) {
280 ICH_LR_EL2 ich_lr_el2 =
281 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
282 Gicv3::GroupId group =
283 ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S;
284
285 if (group == Gicv3::G1NS) {
286 value = ich_lr_el2.vINTID;
287 }
288 }
289
290 break;
291 }
292
293 // Binary Point Register 0
294 case MISCREG_ICC_BPR0:
295 case MISCREG_ICC_BPR0_EL1:
296 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
297 return readMiscReg(MISCREG_ICV_BPR0_EL1);
298 }
299
300 M5_FALLTHROUGH;
301
302 // Binary Point Register 1
303 case MISCREG_ICC_BPR1:
304 case MISCREG_ICC_BPR1_EL1: {
305 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
306 return readMiscReg(MISCREG_ICV_BPR1_EL1);
307 }
308
309 Gicv3::GroupId group =
310 misc_reg == MISCREG_ICC_BPR0_EL1 ? Gicv3::G0S : Gicv3::G1S;
311
312 if (group == Gicv3::G1S && !inSecureState()) {
313 group = Gicv3::G1NS;
314 }
315
316 ICC_CTLR_EL1 icc_ctlr_el1_s =
317 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S);
318
319 if ((group == Gicv3::G1S) && !isEL3OrMon() &&
320 icc_ctlr_el1_s.CBPR) {
321 group = Gicv3::G0S;
322 }
323
324 bool sat_inc = false;
325
326 ICC_CTLR_EL1 icc_ctlr_el1_ns =
327 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS);
328
329 if ((group == Gicv3::G1NS) && (currEL() < EL3) &&
330 icc_ctlr_el1_ns.CBPR) {
331 // Reads return BPR0 + 1 saturated to 7, WI
332 group = Gicv3::G0S;
333 sat_inc = true;
334 }
335
336 uint8_t bpr;
337
338 if (group == Gicv3::G0S) {
339 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR0_EL1);
340 } else {
341 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR1_EL1);
342 bpr = std::max(bpr, group == Gicv3::G1S ?
343 GIC_MIN_BPR : GIC_MIN_BPR_NS);
344 }
345
346 if (sat_inc) {
347 bpr++;
348
349 if (bpr > 7) {
350 bpr = 7;
351 }
352 }
353
354 value = bpr;
355 break;
356 }
357
358 // Virtual Binary Point Register 1
359 case MISCREG_ICV_BPR0_EL1:
360 case MISCREG_ICV_BPR1_EL1: {
361 Gicv3::GroupId group =
362 misc_reg == MISCREG_ICV_BPR0_EL1 ? Gicv3::G0S : Gicv3::G1NS;
363 ICH_VMCR_EL2 ich_vmcr_el2 =
364 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
365 bool sat_inc = false;
366
367 if ((group == Gicv3::G1NS) && ich_vmcr_el2.VCBPR) {
368 // bpr0 + 1 saturated to 7, WI
369 group = Gicv3::G0S;
370 sat_inc = true;
371 }
372
373 uint8_t vbpr;
374
375 if (group == Gicv3::G0S) {
376 vbpr = ich_vmcr_el2.VBPR0;
377 } else {
378 vbpr = ich_vmcr_el2.VBPR1;
379 }
380
381 if (sat_inc) {
382 vbpr++;
383
384 if (vbpr > 7) {
385 vbpr = 7;
386 }
387 }
388
389 value = vbpr;
390 break;
391 }
392
393 // Interrupt Priority Mask Register
394 case MISCREG_ICC_PMR:
395 case MISCREG_ICC_PMR_EL1:
396 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) {
397 return readMiscReg(MISCREG_ICV_PMR_EL1);
398 }
399
400 if (haveEL(EL3) && !inSecureState() &&
401 (isa->readMiscRegNoEffect(MISCREG_SCR_EL3) & (1U << 2))) {
402 // Spec section 4.8.1
403 // For Non-secure access to ICC_PMR_EL1 when SCR_EL3.FIQ == 1:
404 if ((value & 0x80) == 0) {
405 // If the current priority mask value is in the range of
406 // 0x00-0x7F a read access returns the value 0x00.
407 value = 0;
408 } else if (value != 0xff) {
409 // If the current priority mask value is in the range of
410 // 0x80-0xFF a read access returns the Non-secure read of the
411 // current value.
412 value = (value << 1) & 0xff;
413 }
414 }
415
416 break;
417
418 case MISCREG_ICV_PMR_EL1: { // Priority Mask Register
419 ICH_VMCR_EL2 ich_vmcr_el2 =
420 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
421
422 value = ich_vmcr_el2.VPMR;
423 break;
424 }
425
426 // Interrupt Acknowledge Register 0
427 case MISCREG_ICC_IAR0:
428 case MISCREG_ICC_IAR0_EL1: {
429 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
430 return readMiscReg(MISCREG_ICV_IAR0_EL1);
431 }
432
433 uint32_t int_id;
434
435 if (hppiCanPreempt()) {
436 int_id = getHPPIR0();
437
438 // avoid activation for special interrupts
439 if (int_id < Gicv3::INTID_SECURE ||
440 int_id >= Gicv3Redistributor::SMALLEST_LPI_ID) {
441 activateIRQ(int_id, hppi.group);
442 }
443 } else {
444 int_id = Gicv3::INTID_SPURIOUS;
445 }
446
447 value = int_id;
448 break;
449 }
450
451 // Virtual Interrupt Acknowledge Register 0
452 case MISCREG_ICV_IAR0_EL1: {
453 int lr_idx = getHPPVILR();
454 uint32_t int_id = Gicv3::INTID_SPURIOUS;
455
456 if (lr_idx >= 0) {
457 ICH_LR_EL2 ich_lr_el2 =
458 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
459
460 if (!ich_lr_el2.Group && hppviCanPreempt(lr_idx)) {
461 int_id = ich_lr_el2.vINTID;
462
463 if (int_id < Gicv3::INTID_SECURE ||
464 int_id > Gicv3::INTID_SPURIOUS) {
465 virtualActivateIRQ(lr_idx);
466 } else {
467 // Bogus... Pseudocode says:
468 // - Move from pending to invalid...
469 // - Return de bogus id...
470 ich_lr_el2.State = ICH_LR_EL2_STATE_INVALID;
471 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx,
472 ich_lr_el2);
473 }
474 }
475 }
476
477 value = int_id;
478 virtualUpdate();
479 break;
480 }
481
482 // Interrupt Acknowledge Register 1
483 case MISCREG_ICC_IAR1:
484 case MISCREG_ICC_IAR1_EL1: {
485 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
486 return readMiscReg(MISCREG_ICV_IAR1_EL1);
487 }
488
489 uint32_t int_id;
490
491 if (hppiCanPreempt()) {
492 int_id = getHPPIR1();
493
494 // avoid activation for special interrupts
495 if (int_id < Gicv3::INTID_SECURE ||
496 int_id >= Gicv3Redistributor::SMALLEST_LPI_ID) {
497 activateIRQ(int_id, hppi.group);
498 }
499 } else {
500 int_id = Gicv3::INTID_SPURIOUS;
501 }
502
503 value = int_id;
504 break;
505 }
506
507 // Virtual Interrupt Acknowledge Register 1
508 case MISCREG_ICV_IAR1_EL1: {
509 int lr_idx = getHPPVILR();
510 uint32_t int_id = Gicv3::INTID_SPURIOUS;
511
512 if (lr_idx >= 0) {
513 ICH_LR_EL2 ich_lr_el2 =
514 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
515
516 if (ich_lr_el2.Group && hppviCanPreempt(lr_idx)) {
517 int_id = ich_lr_el2.vINTID;
518
519 if (int_id < Gicv3::INTID_SECURE ||
520 int_id > Gicv3::INTID_SPURIOUS) {
521 virtualActivateIRQ(lr_idx);
522 } else {
523 // Bogus... Pseudocode says:
524 // - Move from pending to invalid...
525 // - Return de bogus id...
526 ich_lr_el2.State = ICH_LR_EL2_STATE_INVALID;
527 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx,
528 ich_lr_el2);
529 }
530 }
531 }
532
533 value = int_id;
534 virtualUpdate();
535 break;
536 }
537
538 // System Register Enable Register EL1
539 case MISCREG_ICC_SRE:
540 case MISCREG_ICC_SRE_EL1: {
541 /*
542 * DIB [2] == 1 (IRQ bypass not supported, RAO/WI)
543 * DFB [1] == 1 (FIQ bypass not supported, RAO/WI)
544 * SRE [0] == 1 (Only system register interface supported, RAO/WI)
545 */
546 ICC_SRE_EL1 icc_sre_el1 = 0;
547 icc_sre_el1.SRE = 1;
548 icc_sre_el1.DIB = 1;
549 icc_sre_el1.DFB = 1;
550 value = icc_sre_el1;
551 break;
552 }
553
554 // System Register Enable Register EL2
555 case MISCREG_ICC_HSRE:
556 case MISCREG_ICC_SRE_EL2: {
557 /*
558 * Enable [3] == 1
559 * (EL1 accesses to ICC_SRE_EL1 do not trap to EL2, RAO/WI)
560 * DIB [2] == 1 (IRQ bypass not supported, RAO/WI)
561 * DFB [1] == 1 (FIQ bypass not supported, RAO/WI)
562 * SRE [0] == 1 (Only system register interface supported, RAO/WI)
563 */
564 ICC_SRE_EL2 icc_sre_el2 = 0;
565 icc_sre_el2.SRE = 1;
566 icc_sre_el2.DIB = 1;
567 icc_sre_el2.DFB = 1;
568 icc_sre_el2.Enable = 1;
569 value = icc_sre_el2;
570 break;
571 }
572
573 // System Register Enable Register EL3
574 case MISCREG_ICC_MSRE:
575 case MISCREG_ICC_SRE_EL3: {
576 /*
577 * Enable [3] == 1
578 * (EL1 accesses to ICC_SRE_EL1 do not trap to EL3.
579 * EL2 accesses to ICC_SRE_EL1 and ICC_SRE_EL2 do not trap to EL3.
580 * RAO/WI)
581 * DIB [2] == 1 (IRQ bypass not supported, RAO/WI)
582 * DFB [1] == 1 (FIQ bypass not supported, RAO/WI)
583 * SRE [0] == 1 (Only system register interface supported, RAO/WI)
584 */
585 ICC_SRE_EL3 icc_sre_el3 = 0;
586 icc_sre_el3.SRE = 1;
587 icc_sre_el3.DIB = 1;
588 icc_sre_el3.DFB = 1;
589 icc_sre_el3.Enable = 1;
590 value = icc_sre_el3;
591 break;
592 }
593
594 // Control Register
595 case MISCREG_ICC_CTLR:
596 case MISCREG_ICC_CTLR_EL1: {
597 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) {
598 return readMiscReg(MISCREG_ICV_CTLR_EL1);
599 }
600
601 // Enforce value for RO bits
602 // ExtRange [19], INTIDs in the range 1024..8191 not supported
603 // RSS [18], SGIs with affinity level 0 values of 0-255 are supported
604 // A3V [15], supports non-zero values of the Aff3 field in SGI
605 // generation System registers
606 // SEIS [14], does not support generation of SEIs (deprecated)
607 // IDbits [13:11], 001 = 24 bits | 000 = 16 bits
608 // PRIbits [10:8], number of priority bits implemented, minus one
609 ICC_CTLR_EL1 icc_ctlr_el1 = value;
610 icc_ctlr_el1.ExtRange = 0;
611 icc_ctlr_el1.RSS = 1;
612 icc_ctlr_el1.A3V = 1;
613 icc_ctlr_el1.SEIS = 0;
614 icc_ctlr_el1.IDbits = 1;
615 icc_ctlr_el1.PRIbits = PRIORITY_BITS - 1;
616 value = icc_ctlr_el1;
617 break;
618 }
619
620 // Virtual Control Register
621 case MISCREG_ICV_CTLR_EL1: {
622 ICV_CTLR_EL1 icv_ctlr_el1 = value;
623 icv_ctlr_el1.RSS = 0;
624 icv_ctlr_el1.A3V = 1;
625 icv_ctlr_el1.SEIS = 0;
626 icv_ctlr_el1.IDbits = 1;
627 icv_ctlr_el1.PRIbits = 7;
628 value = icv_ctlr_el1;
629 break;
630 }
631
632 // Control Register
633 case MISCREG_ICC_MCTLR:
634 case MISCREG_ICC_CTLR_EL3: {
635 // Enforce value for RO bits
636 // ExtRange [19], INTIDs in the range 1024..8191 not supported
637 // RSS [18], SGIs with affinity level 0 values of 0-255 are supported
638 // nDS [17], supports disabling of security
639 // A3V [15], supports non-zero values of the Aff3 field in SGI
640 // generation System registers
641 // SEIS [14], does not support generation of SEIs (deprecated)
642 // IDbits [13:11], 001 = 24 bits | 000 = 16 bits
643 // PRIbits [10:8], number of priority bits implemented, minus one
644 ICC_CTLR_EL3 icc_ctlr_el3 = value;
645 icc_ctlr_el3.ExtRange = 0;
646 icc_ctlr_el3.RSS = 1;
647 icc_ctlr_el3.nDS = 0;
648 icc_ctlr_el3.A3V = 1;
649 icc_ctlr_el3.SEIS = 0;
650 icc_ctlr_el3.IDbits = 0;
651 icc_ctlr_el3.PRIbits = PRIORITY_BITS - 1;
652 value = icc_ctlr_el3;
653 break;
654 }
655
656 // Hyp Control Register
657 case MISCREG_ICH_HCR:
658 case MISCREG_ICH_HCR_EL2:
659 break;
660
661 // Hyp Active Priorities Group 0 Registers
662 case MISCREG_ICH_AP0R0:
663 case MISCREG_ICH_AP0R0_EL2:
664 break;
665
666 // Hyp Active Priorities Group 1 Registers
667 case MISCREG_ICH_AP1R0:
668 case MISCREG_ICH_AP1R0_EL2:
669 break;
670
671 // Maintenance Interrupt State Register
672 case MISCREG_ICH_MISR:
673 case MISCREG_ICH_MISR_EL2:
674 value = maintenanceInterruptStatus();
675 break;
676
677 // VGIC Type Register
678 case MISCREG_ICH_VTR:
679 case MISCREG_ICH_VTR_EL2: {
680 ICH_VTR_EL2 ich_vtr_el2 = value;
681
682 ich_vtr_el2.ListRegs = VIRTUAL_NUM_LIST_REGS - 1;
683 ich_vtr_el2.A3V = 1;
684 ich_vtr_el2.IDbits = 1;
685 ich_vtr_el2.PREbits = VIRTUAL_PREEMPTION_BITS - 1;
686 ich_vtr_el2.PRIbits = VIRTUAL_PRIORITY_BITS - 1;
687
688 value = ich_vtr_el2;
689 break;
690 }
691
692 // End of Interrupt Status Register
693 case MISCREG_ICH_EISR:
694 case MISCREG_ICH_EISR_EL2:
695 value = eoiMaintenanceInterruptStatus();
696 break;
697
698 // Empty List Register Status Register
699 case MISCREG_ICH_ELRSR:
700 case MISCREG_ICH_ELRSR_EL2:
701 value = 0;
702
703 for (int lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) {
704 ICH_LR_EL2 ich_lr_el2 =
705 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
706
707 if ((ich_lr_el2.State == ICH_LR_EL2_STATE_INVALID) &&
708 (ich_lr_el2.HW || !ich_lr_el2.EOI)) {
709 value |= (1 << lr_idx);
710 }
711 }
712
713 break;
714
715 // List Registers
716 case MISCREG_ICH_LRC0 ... MISCREG_ICH_LRC15:
717 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 high half part)
718 value = value >> 32;
719 break;
720
721 // List Registers
722 case MISCREG_ICH_LR0 ... MISCREG_ICH_LR15:
723 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 low half part)
724 value = value & 0xffffffff;
725 break;
726
727 // List Registers
728 case MISCREG_ICH_LR0_EL2 ... MISCREG_ICH_LR15_EL2:
729 break;
730
731 // Virtual Machine Control Register
732 case MISCREG_ICH_VMCR:
733 case MISCREG_ICH_VMCR_EL2:
734 break;
735
736 default:
737 panic("Gicv3CPUInterface::readMiscReg(): unknown register %d (%s)",
738 misc_reg, miscRegName[misc_reg]);
739 }
740
741 DPRINTF(GIC, "Gicv3CPUInterface::readMiscReg(): register %s value %#x\n",
742 miscRegName[misc_reg], value);
743 return value;
744}
745
746void
747Gicv3CPUInterface::setMiscReg(int misc_reg, RegVal val)
748{
749 bool do_virtual_update = false;
750 DPRINTF(GIC, "Gicv3CPUInterface::setMiscReg(): register %s value %#x\n",
751 miscRegName[misc_reg], val);
752 bool hcr_fmo = getHCREL2FMO();
753 bool hcr_imo = getHCREL2IMO();
754
755 switch (misc_reg) {
756 // Active Priorities Group 1 Registers
757 case MISCREG_ICC_AP1R0:
758 case MISCREG_ICC_AP1R0_EL1:
759 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
760 return isa->setMiscRegNoEffect(MISCREG_ICV_AP1R0_EL1, val);
761 }
762
763 break;
764
765 case MISCREG_ICC_AP1R1:
766 case MISCREG_ICC_AP1R1_EL1:
767
768 // only implemented if supporting 6 or more bits of priority
769 case MISCREG_ICC_AP1R2:
770 case MISCREG_ICC_AP1R2_EL1:
771
772 // only implemented if supporting 7 or more bits of priority
773 case MISCREG_ICC_AP1R3:
774 case MISCREG_ICC_AP1R3_EL1:
775 // only implemented if supporting 7 or more bits of priority
776 break;
777
778 // Active Priorities Group 0 Registers
779 case MISCREG_ICC_AP0R0:
780 case MISCREG_ICC_AP0R0_EL1:
781 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
782 return isa->setMiscRegNoEffect(MISCREG_ICV_AP0R0_EL1, val);
783 }
784
785 break;
786
787 case MISCREG_ICC_AP0R1:
788 case MISCREG_ICC_AP0R1_EL1:
789
790 // only implemented if supporting 6 or more bits of priority
791 case MISCREG_ICC_AP0R2:
792 case MISCREG_ICC_AP0R2_EL1:
793
794 // only implemented if supporting 7 or more bits of priority
795 case MISCREG_ICC_AP0R3:
796 case MISCREG_ICC_AP0R3_EL1:
797 // only implemented if supporting 7 or more bits of priority
798 break;
799
800 // End Of Interrupt Register 0
801 case MISCREG_ICC_EOIR0:
802 case MISCREG_ICC_EOIR0_EL1: { // End Of Interrupt Register 0
803 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
804 return setMiscReg(MISCREG_ICV_EOIR0_EL1, val);
805 }
806
807 int int_id = val & 0xffffff;
808
809 // avoid activation for special interrupts
810 if (int_id >= Gicv3::INTID_SECURE &&
811 int_id <= Gicv3::INTID_SPURIOUS) {
812 return;
813 }
814
815 Gicv3::GroupId group = Gicv3::G0S;
816
817 if (highestActiveGroup() != group) {
818 return;
819 }
820
821 dropPriority(group);
822
823 if (!isEOISplitMode()) {
824 deactivateIRQ(int_id, group);
825 }
826
827 break;
828 }
829
830 // Virtual End Of Interrupt Register 0
831 case MISCREG_ICV_EOIR0_EL1: {
832 int int_id = val & 0xffffff;
833
834 // avoid deactivation for special interrupts
835 if (int_id >= Gicv3::INTID_SECURE &&
836 int_id <= Gicv3::INTID_SPURIOUS) {
837 return;
838 }
839
840 uint8_t drop_prio = virtualDropPriority();
841
842 if (drop_prio == 0xff) {
843 return;
844 }
845
846 int lr_idx = virtualFindActive(int_id);
847
848 if (lr_idx < 0) {
849 // No LR found matching
850 virtualIncrementEOICount();
851 } else {
852 ICH_LR_EL2 ich_lr_el2 =
853 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
854 Gicv3::GroupId lr_group =
855 ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S;
856 uint8_t lr_group_prio = ich_lr_el2.Priority & 0xf8;
857
858 if (lr_group == Gicv3::G0S && lr_group_prio == drop_prio) {
859 //if (!virtualIsEOISplitMode())
860 {
861 virtualDeactivateIRQ(lr_idx);
862 }
863 }
864 }
865
866 virtualUpdate();
867 break;
868 }
869
870 // End Of Interrupt Register 1
871 case MISCREG_ICC_EOIR1:
872 case MISCREG_ICC_EOIR1_EL1: {
873 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
874 return setMiscReg(MISCREG_ICV_EOIR1_EL1, val);
875 }
876
877 int int_id = val & 0xffffff;
878
879 // avoid deactivation for special interrupts
880 if (int_id >= Gicv3::INTID_SECURE &&
881 int_id <= Gicv3::INTID_SPURIOUS) {
882 return;
883 }
884
885 Gicv3::GroupId group = inSecureState() ? Gicv3::G1S : Gicv3::G1NS;
886
887 if (highestActiveGroup() == Gicv3::G0S) {
888 return;
889 }
890
891 if (distributor->DS == 0) {
892 if (highestActiveGroup() == Gicv3::G1S && !inSecureState()) {
893 return;
894 } else if (highestActiveGroup() == Gicv3::G1NS &&
895 !(!inSecureState() or (currEL() == EL3))) {
896 return;
897 }
898 }
899
900 dropPriority(group);
901
902 if (!isEOISplitMode()) {
903 deactivateIRQ(int_id, group);
904 }
905
906 break;
907 }
908
909 // Virtual End Of Interrupt Register 1
910 case MISCREG_ICV_EOIR1_EL1: {
911 int int_id = val & 0xffffff;
912
913 // avoid deactivation for special interrupts
914 if (int_id >= Gicv3::INTID_SECURE &&
915 int_id <= Gicv3::INTID_SPURIOUS) {
916 return;
917 }
918
919 uint8_t drop_prio = virtualDropPriority();
920
921 if (drop_prio == 0xff) {
922 return;
923 }
924
925 int lr_idx = virtualFindActive(int_id);
926
927 if (lr_idx < 0) {
928 // No matching LR found
929 virtualIncrementEOICount();
930 } else {
931 ICH_LR_EL2 ich_lr_el2 =
932 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
933 Gicv3::GroupId lr_group =
934 ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S;
935 uint8_t lr_group_prio = ich_lr_el2.Priority & 0xf8;
936
937 if (lr_group == Gicv3::G1NS && lr_group_prio == drop_prio) {
938 if (!virtualIsEOISplitMode()) {
939 virtualDeactivateIRQ(lr_idx);
940 }
941 }
942 }
943
944 virtualUpdate();
945 break;
946 }
947
948 // Deactivate Interrupt Register
949 case MISCREG_ICC_DIR:
950 case MISCREG_ICC_DIR_EL1: {
951 if ((currEL() == EL1) && !inSecureState() &&
952 (hcr_imo || hcr_fmo)) {
953 return setMiscReg(MISCREG_ICV_DIR_EL1, val);
954 }
955
956 int int_id = val & 0xffffff;
957
958 // The following checks are as per spec pseudocode
959 // aarch64/support/ICC_DIR_EL1
960
961 // Check for spurious ID
962 if (int_id >= Gicv3::INTID_SECURE) {
963 return;
964 }
965
966 // EOI mode is not set, so don't deactivate
967 if (!isEOISplitMode()) {
968 return;
969 }
970
971 Gicv3::GroupId group =
972 int_id >= 32 ? distributor->getIntGroup(int_id) :
973 redistributor->getIntGroup(int_id);
974 bool irq_is_grp0 = group == Gicv3::G0S;
975 bool single_sec_state = distributor->DS;
976 bool irq_is_secure = !single_sec_state && (group != Gicv3::G1NS);
977 SCR scr_el3 = isa->readMiscRegNoEffect(MISCREG_SCR_EL3);
978 bool route_fiq_to_el3 = scr_el3.fiq;
979 bool route_irq_to_el3 = scr_el3.irq;
980 bool route_fiq_to_el2 = hcr_fmo;
981 bool route_irq_to_el2 = hcr_imo;
982
983 switch (currEL()) {
984 case EL3:
985 break;
986
987 case EL2:
988 if (single_sec_state && irq_is_grp0 && !route_fiq_to_el3) {
989 break;
990 }
991
992 if (!irq_is_secure && !irq_is_grp0 && !route_irq_to_el3) {
993 break;
994 }
995
996 return;
997
998 case EL1:
999 if (!isSecureBelowEL3()) {
1000 if (single_sec_state && irq_is_grp0 &&
1001 !route_fiq_to_el3 && !route_fiq_to_el2) {
1002 break;
1003 }
1004
1005 if (!irq_is_secure && !irq_is_grp0 &&
1006 !route_irq_to_el3 && !route_irq_to_el2) {
1007 break;
1008 }
1009 } else {
1010 if (irq_is_grp0 && !route_fiq_to_el3) {
1011 break;
1012 }
1013
1014 if (!irq_is_grp0 &&
1015 (!irq_is_secure || !single_sec_state) &&
1016 !route_irq_to_el3) {
1017 break;
1018 }
1019 }
1020
1021 return;
1022
1023 default:
1024 break;
1025 }
1026
1027 deactivateIRQ(int_id, group);
1028 break;
1029 }
1030
1031 // Deactivate Virtual Interrupt Register
1032 case MISCREG_ICV_DIR_EL1: {
1033 int int_id = val & 0xffffff;
1034
1035 // avoid deactivation for special interrupts
1036 if (int_id >= Gicv3::INTID_SECURE &&
1037 int_id <= Gicv3::INTID_SPURIOUS) {
1038 return;
1039 }
1040
1041 if (!virtualIsEOISplitMode()) {
1042 return;
1043 }
1044
1045 int lr_idx = virtualFindActive(int_id);
1046
1047 if (lr_idx < 0) {
1048 // No matching LR found
1049 virtualIncrementEOICount();
1050 } else {
1051 virtualDeactivateIRQ(lr_idx);
1052 }
1053
1054 virtualUpdate();
1055 break;
1056 }
1057
1058 // Binary Point Register 0
1059 case MISCREG_ICC_BPR0:
1060 case MISCREG_ICC_BPR0_EL1:
1061 // Binary Point Register 1
1062 case MISCREG_ICC_BPR1:
1063 case MISCREG_ICC_BPR1_EL1: {
1064 if ((currEL() == EL1) && !inSecureState()) {
1065 if (misc_reg == MISCREG_ICC_BPR0_EL1 && hcr_fmo) {
1066 return setMiscReg(MISCREG_ICV_BPR0_EL1, val);
1067 } else if (misc_reg == MISCREG_ICC_BPR1_EL1 && hcr_imo) {
1068 return setMiscReg(MISCREG_ICV_BPR1_EL1, val);
1069 }
1070 }
1071
1072 Gicv3::GroupId group =
1073 misc_reg == MISCREG_ICC_BPR0_EL1 ? Gicv3::G0S : Gicv3::G1S;
1074
1075 if (group == Gicv3::G1S && !inSecureState()) {
1076 group = Gicv3::G1NS;
1077 }
1078
1079 ICC_CTLR_EL1 icc_ctlr_el1_s =
1080 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S);
1081
1082 if ((group == Gicv3::G1S) && !isEL3OrMon() &&
1083 icc_ctlr_el1_s.CBPR) {
1084 group = Gicv3::G0S;
1085 }
1086
1087 ICC_CTLR_EL1 icc_ctlr_el1_ns =
1088 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS);
1089
1090 if ((group == Gicv3::G1NS) && (currEL() < EL3) &&
1091 icc_ctlr_el1_ns.CBPR) {
1092 // BPR0 + 1 saturated to 7, WI
1093 return;
1094 }
1095
1096 uint8_t min_val = (group == Gicv3::G1NS) ?
1097 GIC_MIN_BPR_NS : GIC_MIN_BPR;
1098 val &= 0x7;
1099
1100 if (val < min_val) {
1101 val = min_val;
1102 }
1103
1104 break;
1105 }
1106
1107 // Virtual Binary Point Register 0
1108 case MISCREG_ICV_BPR0_EL1:
1109 // Virtual Binary Point Register 1
1110 case MISCREG_ICV_BPR1_EL1: {
1111 Gicv3::GroupId group =
1112 misc_reg == MISCREG_ICV_BPR0_EL1 ? Gicv3::G0S : Gicv3::G1NS;
1113 ICH_VMCR_EL2 ich_vmcr_el2 =
1114 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1115
1116 if ((group == Gicv3::G1NS) && ich_vmcr_el2.VCBPR) {
1117 // BPR0 + 1 saturated to 7, WI
1118 return;
1119 }
1120
1121 uint8_t min_VPBR = 7 - VIRTUAL_PREEMPTION_BITS;
1122
1123 if (group != Gicv3::G0S) {
1124 min_VPBR++;
1125 }
1126
1127 if (val < min_VPBR) {
1128 val = min_VPBR;
1129 }
1130
1131 if (group == Gicv3::G0S) {
1132 ich_vmcr_el2.VBPR0 = val;
1133 } else {
1134 ich_vmcr_el2.VBPR1 = val;
1135 }
1136
1137 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1138 do_virtual_update = true;
1139 break;
1140 }
1141
1142 // Control Register EL1
1143 case MISCREG_ICC_CTLR:
1144 case MISCREG_ICC_CTLR_EL1: {
1145 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) {
1146 return setMiscReg(MISCREG_ICV_CTLR_EL1, val);
1147 }
1148
1149 /*
1150 * ExtRange is RO.
1151 * RSS is RO.
1152 * A3V is RO.
1153 * SEIS is RO.
1154 * IDbits is RO.
1155 * PRIbits is RO.
1156 */
1157 ICC_CTLR_EL1 requested_icc_ctlr_el1 = val;
1158 ICC_CTLR_EL1 icc_ctlr_el1 =
1159 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1);
1160
1161 ICC_CTLR_EL3 icc_ctlr_el3 =
1162 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3);
1163
1164 // The following could be refactored but it is following
1165 // spec description section 9.2.6 point by point.
1166
1167 // PMHE
1168 if (haveEL(EL3)) {
1169 // PMHE is alias of ICC_CTLR_EL3.PMHE
1170
1171 if (distributor->DS == 0) {
1172 // PMHE is RO
1173 } else if (distributor->DS == 1) {
1174 // PMHE is RW
1175 icc_ctlr_el1.PMHE = requested_icc_ctlr_el1.PMHE;
1176 icc_ctlr_el3.PMHE = icc_ctlr_el1.PMHE;
1177 }
1178 } else {
1179 // PMHE is RW (by implementation choice)
1180 icc_ctlr_el1.PMHE = requested_icc_ctlr_el1.PMHE;
1181 }
1182
1183 // EOImode
1184 icc_ctlr_el1.EOImode = requested_icc_ctlr_el1.EOImode;
1185
1186 if (inSecureState()) {
1187 // EOIMode is alias of ICC_CTLR_EL3.EOImode_EL1S
1188 icc_ctlr_el3.EOImode_EL1S = icc_ctlr_el1.EOImode;
1189 } else {
1190 // EOIMode is alias of ICC_CTLR_EL3.EOImode_EL1NS
1191 icc_ctlr_el3.EOImode_EL1NS = icc_ctlr_el1.EOImode;
1192 }
1193
1194 // CBPR
1195 if (haveEL(EL3)) {
1196 // CBPR is alias of ICC_CTLR_EL3.CBPR_EL1{S,NS}
1197
1198 if (distributor->DS == 0) {
1199 // CBPR is RO
1200 } else {
1201 // CBPR is RW
1202 icc_ctlr_el1.CBPR = requested_icc_ctlr_el1.CBPR;
1203
1204 if (inSecureState()) {
1205 icc_ctlr_el3.CBPR_EL1S = icc_ctlr_el1.CBPR;
1206 } else {
1207 icc_ctlr_el3.CBPR_EL1NS = icc_ctlr_el1.CBPR;
1208 }
1209 }
1210 } else {
1211 // CBPR is RW
1212 icc_ctlr_el1.CBPR = requested_icc_ctlr_el1.CBPR;
1213 }
1214
1215 isa->setMiscRegNoEffect(MISCREG_ICC_CTLR_EL3, icc_ctlr_el3);
1216
1217 val = icc_ctlr_el1;
1218 break;
1219 }
1220
1221 // Virtual Control Register
1222 case MISCREG_ICV_CTLR_EL1: {
1223 ICV_CTLR_EL1 requested_icv_ctlr_el1 = val;
1224 ICV_CTLR_EL1 icv_ctlr_el1 =
1225 isa->readMiscRegNoEffect(MISCREG_ICV_CTLR_EL1);
1226 icv_ctlr_el1.EOImode = requested_icv_ctlr_el1.EOImode;
1227 icv_ctlr_el1.CBPR = requested_icv_ctlr_el1.CBPR;
1228 val = icv_ctlr_el1;
1229
1230 // Aliases
1231 // ICV_CTLR_EL1.CBPR aliases ICH_VMCR_EL2.VCBPR.
1232 // ICV_CTLR_EL1.EOImode aliases ICH_VMCR_EL2.VEOIM.
1233 ICH_VMCR_EL2 ich_vmcr_el2 =
1234 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1235 ich_vmcr_el2.VCBPR = icv_ctlr_el1.CBPR;
1236 ich_vmcr_el2.VEOIM = icv_ctlr_el1.EOImode;
1237 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1238 break;
1239 }
1240
1241 // Control Register EL3
1242 case MISCREG_ICC_MCTLR:
1243 case MISCREG_ICC_CTLR_EL3: {
1244 /*
1245 * ExtRange is RO.
1246 * RSS is RO.
1247 * nDS is RO.
1248 * A3V is RO.
1249 * SEIS is RO.
1250 * IDbits is RO.
1251 * PRIbits is RO.
1252 * PMHE is RAO/WI, priority-based routing is always used.
1253 */
1254 ICC_CTLR_EL3 requested_icc_ctlr_el3 = val;
1255
1256 // Aliases
1257 if (haveEL(EL3))
1258 {
1259 ICC_CTLR_EL1 icc_ctlr_el1_s =
1260 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S);
1261 ICC_CTLR_EL1 icc_ctlr_el1_ns =
1262 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS);
1263
1264 // ICC_CTLR_EL1(NS).EOImode is an alias of
1265 // ICC_CTLR_EL3.EOImode_EL1NS
1266 icc_ctlr_el1_ns.EOImode = requested_icc_ctlr_el3.EOImode_EL1NS;
1267 // ICC_CTLR_EL1(S).EOImode is an alias of
1268 // ICC_CTLR_EL3.EOImode_EL1S
1269 icc_ctlr_el1_s.EOImode = requested_icc_ctlr_el3.EOImode_EL1S;
1270 // ICC_CTLR_EL1(NS).CBPR is an alias of ICC_CTLR_EL3.CBPR_EL1NS
1271 icc_ctlr_el1_ns.CBPR = requested_icc_ctlr_el3.CBPR_EL1NS;
1272 // ICC_CTLR_EL1(S).CBPR is an alias of ICC_CTLR_EL3.CBPR_EL1S
1273 icc_ctlr_el1_s.CBPR = requested_icc_ctlr_el3.CBPR_EL1S;
1274
1275 isa->setMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S, icc_ctlr_el1_s);
1276 isa->setMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS,
1277 icc_ctlr_el1_ns);
1278 }
1279
1280 ICC_CTLR_EL3 icc_ctlr_el3 =
1281 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3);
1282
1283 icc_ctlr_el3.RM = requested_icc_ctlr_el3.RM;
1284 icc_ctlr_el3.EOImode_EL1NS = requested_icc_ctlr_el3.EOImode_EL1NS;
1285 icc_ctlr_el3.EOImode_EL1S = requested_icc_ctlr_el3.EOImode_EL1S;
1286 icc_ctlr_el3.EOImode_EL3 = requested_icc_ctlr_el3.EOImode_EL3;
1287 icc_ctlr_el3.CBPR_EL1NS = requested_icc_ctlr_el3.CBPR_EL1NS;
1288 icc_ctlr_el3.CBPR_EL1S = requested_icc_ctlr_el3.CBPR_EL1S;
1289
1290 val = icc_ctlr_el3;
1291 break;
1292 }
1293
1294 // Priority Mask Register
1295 case MISCREG_ICC_PMR:
1296 case MISCREG_ICC_PMR_EL1: {
1297 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) {
1298 return setMiscReg(MISCREG_ICV_PMR_EL1, val);
1299 }
1300
1301 val &= 0xff;
1302 SCR scr_el3 = isa->readMiscRegNoEffect(MISCREG_SCR_EL3);
1303
1304 if (haveEL(EL3) && !inSecureState() && (scr_el3.fiq)) {
1305 // Spec section 4.8.1
1306 // For Non-secure access to ICC_PMR_EL1 SCR_EL3.FIQ == 1:
1307 RegVal old_icc_pmr_el1 =
1308 isa->readMiscRegNoEffect(MISCREG_ICC_PMR_EL1);
1309
1310 if (!(old_icc_pmr_el1 & 0x80)) {
1311 // If the current priority mask value is in the range of
1312 // 0x00-0x7F then WI
1313 return;
1314 }
1315
1316 // If the current priority mask value is in the range of
1317 // 0x80-0xFF then a write access to ICC_PMR_EL1 succeeds,
1318 // based on the Non-secure read of the priority mask value
1319 // written to the register.
1320
1321 val = (val >> 1) | 0x80;
1322 }
1323
1324 val &= ~0U << (8 - PRIORITY_BITS);
1325 break;
1326 }
1327
1328 case MISCREG_ICV_PMR_EL1: { // Priority Mask Register
1329 ICH_VMCR_EL2 ich_vmcr_el2 =
1330 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1331 ich_vmcr_el2.VPMR = val & 0xff;
1332
1333 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1334 virtualUpdate();
1335 return;
1336 }
1337
1338 // Interrupt Group 0 Enable Register EL1
1339 case MISCREG_ICC_IGRPEN0:
1340 case MISCREG_ICC_IGRPEN0_EL1: {
1341 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
1342 return setMiscReg(MISCREG_ICV_IGRPEN0_EL1, val);
1343 }
1344
1345 break;
1346 }
1347
1348 // Virtual Interrupt Group 0 Enable register
1349 case MISCREG_ICV_IGRPEN0_EL1: {
1350 bool enable = val & 0x1;
1351 ICH_VMCR_EL2 ich_vmcr_el2 =
1352 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1353 ich_vmcr_el2.VENG0 = enable;
1354 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1355 virtualUpdate();
1356 return;
1357 }
1358
1359 // Interrupt Group 1 Enable register EL1
1360 case MISCREG_ICC_IGRPEN1:
1361 case MISCREG_ICC_IGRPEN1_EL1: {
1362 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
1363 return setMiscReg(MISCREG_ICV_IGRPEN1_EL1, val);
1364 }
1365
1366 if (haveEL(EL3)) {
1367 ICC_IGRPEN1_EL1 icc_igrpen1_el1 = val;
1368 ICC_IGRPEN1_EL3 icc_igrpen1_el3 =
1369 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL3);
1370
1371 if (inSecureState()) {
1372 // Enable is RW alias of ICC_IGRPEN1_EL3.EnableGrp1S
1373 icc_igrpen1_el3.EnableGrp1S = icc_igrpen1_el1.Enable;
1374 } else {
1375 // Enable is RW alias of ICC_IGRPEN1_EL3.EnableGrp1NS
1376 icc_igrpen1_el3.EnableGrp1NS = icc_igrpen1_el1.Enable;
1377 }
1378
1379 isa->setMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL3,
1380 icc_igrpen1_el3);
1381 }
1382
1383 break;
1384 }
1385
1386 // Virtual Interrupt Group 1 Enable register
1387 case MISCREG_ICV_IGRPEN1_EL1: {
1388 bool enable = val & 0x1;
1389 ICH_VMCR_EL2 ich_vmcr_el2 =
1390 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1391 ich_vmcr_el2.VENG1 = enable;
1392 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1393 virtualUpdate();
1394 return;
1395 }
1396
1397 // Interrupt Group 1 Enable register
1398 case MISCREG_ICC_MGRPEN1:
1399 case MISCREG_ICC_IGRPEN1_EL3: {
1400 ICC_IGRPEN1_EL3 icc_igrpen1_el3 = val;
1401 ICC_IGRPEN1_EL1 icc_igrpen1_el1 =
1402 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1);
1403
1404 if (inSecureState()) {
1405 // ICC_IGRPEN1_EL1.Enable is RW alias of EnableGrp1S
1406 icc_igrpen1_el1.Enable = icc_igrpen1_el3.EnableGrp1S;
1407 } else {
1408 // ICC_IGRPEN1_EL1.Enable is RW alias of EnableGrp1NS
1409 icc_igrpen1_el1.Enable = icc_igrpen1_el3.EnableGrp1NS;
1410 }
1411
1412 isa->setMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1, icc_igrpen1_el1);
1413 break;
1414 }
1415
1416 // Software Generated Interrupt Group 0 Register
1417 case MISCREG_ICC_SGI0R:
1418 case MISCREG_ICC_SGI0R_EL1:
| 14 * Copyright (c) 2018 Metempsy Technology Consulting
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Jairo Balart
41 */
42
43#include "dev/arm/gic_v3_cpu_interface.hh"
44
45#include "arch/arm/isa.hh"
46#include "debug/GIC.hh"
47#include "dev/arm/gic_v3.hh"
48#include "dev/arm/gic_v3_distributor.hh"
49#include "dev/arm/gic_v3_redistributor.hh"
50
51const uint8_t Gicv3CPUInterface::GIC_MIN_BPR;
52const uint8_t Gicv3CPUInterface::GIC_MIN_BPR_NS;
53
54Gicv3CPUInterface::Gicv3CPUInterface(Gicv3 * gic, uint32_t cpu_id)
55 : BaseISADevice(),
56 gic(gic),
57 redistributor(nullptr),
58 distributor(nullptr),
59 cpuId(cpu_id)
60{
61}
62
63void
64Gicv3CPUInterface::init()
65{
66 redistributor = gic->getRedistributor(cpuId);
67 distributor = gic->getDistributor();
68}
69
70void
71Gicv3CPUInterface::initState()
72{
73 reset();
74}
75
76void
77Gicv3CPUInterface::reset()
78{
79 hppi.prio = 0xff;
80}
81
82void
83Gicv3CPUInterface::setThreadContext(ThreadContext *tc)
84{
85 maintenanceInterrupt = gic->params()->maint_int->get(tc);
86}
87
88bool
89Gicv3CPUInterface::getHCREL2FMO() const
90{
91 HCR hcr = isa->readMiscRegNoEffect(MISCREG_HCR_EL2);
92
93 if (hcr.tge && hcr.e2h) {
94 return false;
95 } else if (hcr.tge) {
96 return true;
97 } else {
98 return hcr.fmo;
99 }
100}
101
102bool
103Gicv3CPUInterface::getHCREL2IMO() const
104{
105 HCR hcr = isa->readMiscRegNoEffect(MISCREG_HCR_EL2);
106
107 if (hcr.tge && hcr.e2h) {
108 return false;
109 } else if (hcr.tge) {
110 return true;
111 } else {
112 return hcr.imo;
113 }
114}
115
116RegVal
117Gicv3CPUInterface::readMiscReg(int misc_reg)
118{
119 RegVal value = isa->readMiscRegNoEffect(misc_reg);
120 bool hcr_fmo = getHCREL2FMO();
121 bool hcr_imo = getHCREL2IMO();
122
123 switch (misc_reg) {
124 // Active Priorities Group 1 Registers
125 case MISCREG_ICC_AP1R0:
126 case MISCREG_ICC_AP1R0_EL1: {
127 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
128 return isa->readMiscRegNoEffect(MISCREG_ICV_AP1R0_EL1);
129 }
130
131 break;
132 }
133
134 case MISCREG_ICC_AP1R1:
135 case MISCREG_ICC_AP1R1_EL1:
136
137 // only implemented if supporting 6 or more bits of priority
138 case MISCREG_ICC_AP1R2:
139 case MISCREG_ICC_AP1R2_EL1:
140
141 // only implemented if supporting 7 or more bits of priority
142 case MISCREG_ICC_AP1R3:
143 case MISCREG_ICC_AP1R3_EL1:
144 // only implemented if supporting 7 or more bits of priority
145 return 0;
146
147 // Active Priorities Group 0 Registers
148 case MISCREG_ICC_AP0R0:
149 case MISCREG_ICC_AP0R0_EL1: {
150 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
151 return isa->readMiscRegNoEffect(MISCREG_ICV_AP0R0_EL1);
152 }
153
154 break;
155 }
156
157 case MISCREG_ICC_AP0R1:
158 case MISCREG_ICC_AP0R1_EL1:
159
160 // only implemented if supporting 6 or more bits of priority
161 case MISCREG_ICC_AP0R2:
162 case MISCREG_ICC_AP0R2_EL1:
163
164 // only implemented if supporting 7 or more bits of priority
165 case MISCREG_ICC_AP0R3:
166 case MISCREG_ICC_AP0R3_EL1:
167 // only implemented if supporting 7 or more bits of priority
168 return 0;
169
170 // Interrupt Group 0 Enable register EL1
171 case MISCREG_ICC_IGRPEN0:
172 case MISCREG_ICC_IGRPEN0_EL1: {
173 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
174 return readMiscReg(MISCREG_ICV_IGRPEN0_EL1);
175 }
176
177 break;
178 }
179
180 case MISCREG_ICV_IGRPEN0_EL1: {
181 ICH_VMCR_EL2 ich_vmcr_el2 =
182 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
183 value = ich_vmcr_el2.VENG0;
184 break;
185 }
186
187 // Interrupt Group 1 Enable register EL1
188 case MISCREG_ICC_IGRPEN1:
189 case MISCREG_ICC_IGRPEN1_EL1: {
190 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
191 return readMiscReg(MISCREG_ICV_IGRPEN1_EL1);
192 }
193
194 break;
195 }
196
197 case MISCREG_ICV_IGRPEN1_EL1: {
198 ICH_VMCR_EL2 ich_vmcr_el2 =
199 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
200 value = ich_vmcr_el2.VENG1;
201 break;
202 }
203
204 // Interrupt Group 1 Enable register EL3
205 case MISCREG_ICC_MGRPEN1:
206 case MISCREG_ICC_IGRPEN1_EL3:
207 break;
208
209 // Running Priority Register
210 case MISCREG_ICC_RPR:
211 case MISCREG_ICC_RPR_EL1: {
212 if ((currEL() == EL1) && !inSecureState() &&
213 (hcr_imo || hcr_fmo)) {
214 return readMiscReg(MISCREG_ICV_RPR_EL1);
215 }
216
217 uint8_t rprio = highestActivePriority();
218
219 if (haveEL(EL3) && !inSecureState() &&
220 (isa->readMiscRegNoEffect(MISCREG_SCR_EL3) & (1U << 2))) {
221 // Spec section 4.8.1
222 // For Non-secure access to ICC_RPR_EL1 when SCR_EL3.FIQ == 1
223 if ((rprio & 0x80) == 0) {
224 // If the current priority mask value is in the range of
225 // 0x00-0x7F a read access returns the value 0x0
226 rprio = 0;
227 } else if (rprio != 0xff) {
228 // If the current priority mask value is in the range of
229 // 0x80-0xFF a read access returns the Non-secure read of
230 // the current value
231 rprio = (rprio << 1) & 0xff;
232 }
233 }
234
235 value = rprio;
236 break;
237 }
238
239 // Virtual Running Priority Register
240 case MISCREG_ICV_RPR_EL1: {
241 value = virtualHighestActivePriority();
242 break;
243 }
244
245 // Highest Priority Pending Interrupt Register 0
246 case MISCREG_ICC_HPPIR0:
247 case MISCREG_ICC_HPPIR0_EL1: {
248 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
249 return readMiscReg(MISCREG_ICV_HPPIR0_EL1);
250 }
251
252 value = getHPPIR0();
253 break;
254 }
255
256 // Virtual Highest Priority Pending Interrupt Register 0
257 case MISCREG_ICV_HPPIR0_EL1: {
258 value = Gicv3::INTID_SPURIOUS;
259 int lr_idx = getHPPVILR();
260
261 if (lr_idx >= 0) {
262 ICH_LR_EL2 ich_lr_el2 =
263 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
264 Gicv3::GroupId group =
265 ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S;
266
267 if (group == Gicv3::G0S) {
268 value = ich_lr_el2.vINTID;
269 }
270 }
271
272 break;
273 }
274
275 // Highest Priority Pending Interrupt Register 1
276 case MISCREG_ICC_HPPIR1:
277 case MISCREG_ICC_HPPIR1_EL1: {
278 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
279 return readMiscReg(MISCREG_ICV_HPPIR1_EL1);
280 }
281
282 value = getHPPIR1();
283 break;
284 }
285
286 // Virtual Highest Priority Pending Interrupt Register 1
287 case MISCREG_ICV_HPPIR1_EL1: {
288 value = Gicv3::INTID_SPURIOUS;
289 int lr_idx = getHPPVILR();
290
291 if (lr_idx >= 0) {
292 ICH_LR_EL2 ich_lr_el2 =
293 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
294 Gicv3::GroupId group =
295 ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S;
296
297 if (group == Gicv3::G1NS) {
298 value = ich_lr_el2.vINTID;
299 }
300 }
301
302 break;
303 }
304
305 // Binary Point Register 0
306 case MISCREG_ICC_BPR0:
307 case MISCREG_ICC_BPR0_EL1:
308 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
309 return readMiscReg(MISCREG_ICV_BPR0_EL1);
310 }
311
312 M5_FALLTHROUGH;
313
314 // Binary Point Register 1
315 case MISCREG_ICC_BPR1:
316 case MISCREG_ICC_BPR1_EL1: {
317 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
318 return readMiscReg(MISCREG_ICV_BPR1_EL1);
319 }
320
321 Gicv3::GroupId group =
322 misc_reg == MISCREG_ICC_BPR0_EL1 ? Gicv3::G0S : Gicv3::G1S;
323
324 if (group == Gicv3::G1S && !inSecureState()) {
325 group = Gicv3::G1NS;
326 }
327
328 ICC_CTLR_EL1 icc_ctlr_el1_s =
329 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S);
330
331 if ((group == Gicv3::G1S) && !isEL3OrMon() &&
332 icc_ctlr_el1_s.CBPR) {
333 group = Gicv3::G0S;
334 }
335
336 bool sat_inc = false;
337
338 ICC_CTLR_EL1 icc_ctlr_el1_ns =
339 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS);
340
341 if ((group == Gicv3::G1NS) && (currEL() < EL3) &&
342 icc_ctlr_el1_ns.CBPR) {
343 // Reads return BPR0 + 1 saturated to 7, WI
344 group = Gicv3::G0S;
345 sat_inc = true;
346 }
347
348 uint8_t bpr;
349
350 if (group == Gicv3::G0S) {
351 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR0_EL1);
352 } else {
353 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR1_EL1);
354 bpr = std::max(bpr, group == Gicv3::G1S ?
355 GIC_MIN_BPR : GIC_MIN_BPR_NS);
356 }
357
358 if (sat_inc) {
359 bpr++;
360
361 if (bpr > 7) {
362 bpr = 7;
363 }
364 }
365
366 value = bpr;
367 break;
368 }
369
370 // Virtual Binary Point Register 1
371 case MISCREG_ICV_BPR0_EL1:
372 case MISCREG_ICV_BPR1_EL1: {
373 Gicv3::GroupId group =
374 misc_reg == MISCREG_ICV_BPR0_EL1 ? Gicv3::G0S : Gicv3::G1NS;
375 ICH_VMCR_EL2 ich_vmcr_el2 =
376 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
377 bool sat_inc = false;
378
379 if ((group == Gicv3::G1NS) && ich_vmcr_el2.VCBPR) {
380 // bpr0 + 1 saturated to 7, WI
381 group = Gicv3::G0S;
382 sat_inc = true;
383 }
384
385 uint8_t vbpr;
386
387 if (group == Gicv3::G0S) {
388 vbpr = ich_vmcr_el2.VBPR0;
389 } else {
390 vbpr = ich_vmcr_el2.VBPR1;
391 }
392
393 if (sat_inc) {
394 vbpr++;
395
396 if (vbpr > 7) {
397 vbpr = 7;
398 }
399 }
400
401 value = vbpr;
402 break;
403 }
404
405 // Interrupt Priority Mask Register
406 case MISCREG_ICC_PMR:
407 case MISCREG_ICC_PMR_EL1:
408 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) {
409 return readMiscReg(MISCREG_ICV_PMR_EL1);
410 }
411
412 if (haveEL(EL3) && !inSecureState() &&
413 (isa->readMiscRegNoEffect(MISCREG_SCR_EL3) & (1U << 2))) {
414 // Spec section 4.8.1
415 // For Non-secure access to ICC_PMR_EL1 when SCR_EL3.FIQ == 1:
416 if ((value & 0x80) == 0) {
417 // If the current priority mask value is in the range of
418 // 0x00-0x7F a read access returns the value 0x00.
419 value = 0;
420 } else if (value != 0xff) {
421 // If the current priority mask value is in the range of
422 // 0x80-0xFF a read access returns the Non-secure read of the
423 // current value.
424 value = (value << 1) & 0xff;
425 }
426 }
427
428 break;
429
430 case MISCREG_ICV_PMR_EL1: { // Priority Mask Register
431 ICH_VMCR_EL2 ich_vmcr_el2 =
432 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
433
434 value = ich_vmcr_el2.VPMR;
435 break;
436 }
437
438 // Interrupt Acknowledge Register 0
439 case MISCREG_ICC_IAR0:
440 case MISCREG_ICC_IAR0_EL1: {
441 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
442 return readMiscReg(MISCREG_ICV_IAR0_EL1);
443 }
444
445 uint32_t int_id;
446
447 if (hppiCanPreempt()) {
448 int_id = getHPPIR0();
449
450 // avoid activation for special interrupts
451 if (int_id < Gicv3::INTID_SECURE ||
452 int_id >= Gicv3Redistributor::SMALLEST_LPI_ID) {
453 activateIRQ(int_id, hppi.group);
454 }
455 } else {
456 int_id = Gicv3::INTID_SPURIOUS;
457 }
458
459 value = int_id;
460 break;
461 }
462
463 // Virtual Interrupt Acknowledge Register 0
464 case MISCREG_ICV_IAR0_EL1: {
465 int lr_idx = getHPPVILR();
466 uint32_t int_id = Gicv3::INTID_SPURIOUS;
467
468 if (lr_idx >= 0) {
469 ICH_LR_EL2 ich_lr_el2 =
470 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
471
472 if (!ich_lr_el2.Group && hppviCanPreempt(lr_idx)) {
473 int_id = ich_lr_el2.vINTID;
474
475 if (int_id < Gicv3::INTID_SECURE ||
476 int_id > Gicv3::INTID_SPURIOUS) {
477 virtualActivateIRQ(lr_idx);
478 } else {
479 // Bogus... Pseudocode says:
480 // - Move from pending to invalid...
481 // - Return de bogus id...
482 ich_lr_el2.State = ICH_LR_EL2_STATE_INVALID;
483 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx,
484 ich_lr_el2);
485 }
486 }
487 }
488
489 value = int_id;
490 virtualUpdate();
491 break;
492 }
493
494 // Interrupt Acknowledge Register 1
495 case MISCREG_ICC_IAR1:
496 case MISCREG_ICC_IAR1_EL1: {
497 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
498 return readMiscReg(MISCREG_ICV_IAR1_EL1);
499 }
500
501 uint32_t int_id;
502
503 if (hppiCanPreempt()) {
504 int_id = getHPPIR1();
505
506 // avoid activation for special interrupts
507 if (int_id < Gicv3::INTID_SECURE ||
508 int_id >= Gicv3Redistributor::SMALLEST_LPI_ID) {
509 activateIRQ(int_id, hppi.group);
510 }
511 } else {
512 int_id = Gicv3::INTID_SPURIOUS;
513 }
514
515 value = int_id;
516 break;
517 }
518
519 // Virtual Interrupt Acknowledge Register 1
520 case MISCREG_ICV_IAR1_EL1: {
521 int lr_idx = getHPPVILR();
522 uint32_t int_id = Gicv3::INTID_SPURIOUS;
523
524 if (lr_idx >= 0) {
525 ICH_LR_EL2 ich_lr_el2 =
526 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
527
528 if (ich_lr_el2.Group && hppviCanPreempt(lr_idx)) {
529 int_id = ich_lr_el2.vINTID;
530
531 if (int_id < Gicv3::INTID_SECURE ||
532 int_id > Gicv3::INTID_SPURIOUS) {
533 virtualActivateIRQ(lr_idx);
534 } else {
535 // Bogus... Pseudocode says:
536 // - Move from pending to invalid...
537 // - Return de bogus id...
538 ich_lr_el2.State = ICH_LR_EL2_STATE_INVALID;
539 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx,
540 ich_lr_el2);
541 }
542 }
543 }
544
545 value = int_id;
546 virtualUpdate();
547 break;
548 }
549
550 // System Register Enable Register EL1
551 case MISCREG_ICC_SRE:
552 case MISCREG_ICC_SRE_EL1: {
553 /*
554 * DIB [2] == 1 (IRQ bypass not supported, RAO/WI)
555 * DFB [1] == 1 (FIQ bypass not supported, RAO/WI)
556 * SRE [0] == 1 (Only system register interface supported, RAO/WI)
557 */
558 ICC_SRE_EL1 icc_sre_el1 = 0;
559 icc_sre_el1.SRE = 1;
560 icc_sre_el1.DIB = 1;
561 icc_sre_el1.DFB = 1;
562 value = icc_sre_el1;
563 break;
564 }
565
566 // System Register Enable Register EL2
567 case MISCREG_ICC_HSRE:
568 case MISCREG_ICC_SRE_EL2: {
569 /*
570 * Enable [3] == 1
571 * (EL1 accesses to ICC_SRE_EL1 do not trap to EL2, RAO/WI)
572 * DIB [2] == 1 (IRQ bypass not supported, RAO/WI)
573 * DFB [1] == 1 (FIQ bypass not supported, RAO/WI)
574 * SRE [0] == 1 (Only system register interface supported, RAO/WI)
575 */
576 ICC_SRE_EL2 icc_sre_el2 = 0;
577 icc_sre_el2.SRE = 1;
578 icc_sre_el2.DIB = 1;
579 icc_sre_el2.DFB = 1;
580 icc_sre_el2.Enable = 1;
581 value = icc_sre_el2;
582 break;
583 }
584
585 // System Register Enable Register EL3
586 case MISCREG_ICC_MSRE:
587 case MISCREG_ICC_SRE_EL3: {
588 /*
589 * Enable [3] == 1
590 * (EL1 accesses to ICC_SRE_EL1 do not trap to EL3.
591 * EL2 accesses to ICC_SRE_EL1 and ICC_SRE_EL2 do not trap to EL3.
592 * RAO/WI)
593 * DIB [2] == 1 (IRQ bypass not supported, RAO/WI)
594 * DFB [1] == 1 (FIQ bypass not supported, RAO/WI)
595 * SRE [0] == 1 (Only system register interface supported, RAO/WI)
596 */
597 ICC_SRE_EL3 icc_sre_el3 = 0;
598 icc_sre_el3.SRE = 1;
599 icc_sre_el3.DIB = 1;
600 icc_sre_el3.DFB = 1;
601 icc_sre_el3.Enable = 1;
602 value = icc_sre_el3;
603 break;
604 }
605
606 // Control Register
607 case MISCREG_ICC_CTLR:
608 case MISCREG_ICC_CTLR_EL1: {
609 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) {
610 return readMiscReg(MISCREG_ICV_CTLR_EL1);
611 }
612
613 // Enforce value for RO bits
614 // ExtRange [19], INTIDs in the range 1024..8191 not supported
615 // RSS [18], SGIs with affinity level 0 values of 0-255 are supported
616 // A3V [15], supports non-zero values of the Aff3 field in SGI
617 // generation System registers
618 // SEIS [14], does not support generation of SEIs (deprecated)
619 // IDbits [13:11], 001 = 24 bits | 000 = 16 bits
620 // PRIbits [10:8], number of priority bits implemented, minus one
621 ICC_CTLR_EL1 icc_ctlr_el1 = value;
622 icc_ctlr_el1.ExtRange = 0;
623 icc_ctlr_el1.RSS = 1;
624 icc_ctlr_el1.A3V = 1;
625 icc_ctlr_el1.SEIS = 0;
626 icc_ctlr_el1.IDbits = 1;
627 icc_ctlr_el1.PRIbits = PRIORITY_BITS - 1;
628 value = icc_ctlr_el1;
629 break;
630 }
631
632 // Virtual Control Register
633 case MISCREG_ICV_CTLR_EL1: {
634 ICV_CTLR_EL1 icv_ctlr_el1 = value;
635 icv_ctlr_el1.RSS = 0;
636 icv_ctlr_el1.A3V = 1;
637 icv_ctlr_el1.SEIS = 0;
638 icv_ctlr_el1.IDbits = 1;
639 icv_ctlr_el1.PRIbits = 7;
640 value = icv_ctlr_el1;
641 break;
642 }
643
644 // Control Register
645 case MISCREG_ICC_MCTLR:
646 case MISCREG_ICC_CTLR_EL3: {
647 // Enforce value for RO bits
648 // ExtRange [19], INTIDs in the range 1024..8191 not supported
649 // RSS [18], SGIs with affinity level 0 values of 0-255 are supported
650 // nDS [17], supports disabling of security
651 // A3V [15], supports non-zero values of the Aff3 field in SGI
652 // generation System registers
653 // SEIS [14], does not support generation of SEIs (deprecated)
654 // IDbits [13:11], 001 = 24 bits | 000 = 16 bits
655 // PRIbits [10:8], number of priority bits implemented, minus one
656 ICC_CTLR_EL3 icc_ctlr_el3 = value;
657 icc_ctlr_el3.ExtRange = 0;
658 icc_ctlr_el3.RSS = 1;
659 icc_ctlr_el3.nDS = 0;
660 icc_ctlr_el3.A3V = 1;
661 icc_ctlr_el3.SEIS = 0;
662 icc_ctlr_el3.IDbits = 0;
663 icc_ctlr_el3.PRIbits = PRIORITY_BITS - 1;
664 value = icc_ctlr_el3;
665 break;
666 }
667
668 // Hyp Control Register
669 case MISCREG_ICH_HCR:
670 case MISCREG_ICH_HCR_EL2:
671 break;
672
673 // Hyp Active Priorities Group 0 Registers
674 case MISCREG_ICH_AP0R0:
675 case MISCREG_ICH_AP0R0_EL2:
676 break;
677
678 // Hyp Active Priorities Group 1 Registers
679 case MISCREG_ICH_AP1R0:
680 case MISCREG_ICH_AP1R0_EL2:
681 break;
682
683 // Maintenance Interrupt State Register
684 case MISCREG_ICH_MISR:
685 case MISCREG_ICH_MISR_EL2:
686 value = maintenanceInterruptStatus();
687 break;
688
689 // VGIC Type Register
690 case MISCREG_ICH_VTR:
691 case MISCREG_ICH_VTR_EL2: {
692 ICH_VTR_EL2 ich_vtr_el2 = value;
693
694 ich_vtr_el2.ListRegs = VIRTUAL_NUM_LIST_REGS - 1;
695 ich_vtr_el2.A3V = 1;
696 ich_vtr_el2.IDbits = 1;
697 ich_vtr_el2.PREbits = VIRTUAL_PREEMPTION_BITS - 1;
698 ich_vtr_el2.PRIbits = VIRTUAL_PRIORITY_BITS - 1;
699
700 value = ich_vtr_el2;
701 break;
702 }
703
704 // End of Interrupt Status Register
705 case MISCREG_ICH_EISR:
706 case MISCREG_ICH_EISR_EL2:
707 value = eoiMaintenanceInterruptStatus();
708 break;
709
710 // Empty List Register Status Register
711 case MISCREG_ICH_ELRSR:
712 case MISCREG_ICH_ELRSR_EL2:
713 value = 0;
714
715 for (int lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) {
716 ICH_LR_EL2 ich_lr_el2 =
717 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
718
719 if ((ich_lr_el2.State == ICH_LR_EL2_STATE_INVALID) &&
720 (ich_lr_el2.HW || !ich_lr_el2.EOI)) {
721 value |= (1 << lr_idx);
722 }
723 }
724
725 break;
726
727 // List Registers
728 case MISCREG_ICH_LRC0 ... MISCREG_ICH_LRC15:
729 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 high half part)
730 value = value >> 32;
731 break;
732
733 // List Registers
734 case MISCREG_ICH_LR0 ... MISCREG_ICH_LR15:
735 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 low half part)
736 value = value & 0xffffffff;
737 break;
738
739 // List Registers
740 case MISCREG_ICH_LR0_EL2 ... MISCREG_ICH_LR15_EL2:
741 break;
742
743 // Virtual Machine Control Register
744 case MISCREG_ICH_VMCR:
745 case MISCREG_ICH_VMCR_EL2:
746 break;
747
748 default:
749 panic("Gicv3CPUInterface::readMiscReg(): unknown register %d (%s)",
750 misc_reg, miscRegName[misc_reg]);
751 }
752
753 DPRINTF(GIC, "Gicv3CPUInterface::readMiscReg(): register %s value %#x\n",
754 miscRegName[misc_reg], value);
755 return value;
756}
757
758void
759Gicv3CPUInterface::setMiscReg(int misc_reg, RegVal val)
760{
761 bool do_virtual_update = false;
762 DPRINTF(GIC, "Gicv3CPUInterface::setMiscReg(): register %s value %#x\n",
763 miscRegName[misc_reg], val);
764 bool hcr_fmo = getHCREL2FMO();
765 bool hcr_imo = getHCREL2IMO();
766
767 switch (misc_reg) {
768 // Active Priorities Group 1 Registers
769 case MISCREG_ICC_AP1R0:
770 case MISCREG_ICC_AP1R0_EL1:
771 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
772 return isa->setMiscRegNoEffect(MISCREG_ICV_AP1R0_EL1, val);
773 }
774
775 break;
776
777 case MISCREG_ICC_AP1R1:
778 case MISCREG_ICC_AP1R1_EL1:
779
780 // only implemented if supporting 6 or more bits of priority
781 case MISCREG_ICC_AP1R2:
782 case MISCREG_ICC_AP1R2_EL1:
783
784 // only implemented if supporting 7 or more bits of priority
785 case MISCREG_ICC_AP1R3:
786 case MISCREG_ICC_AP1R3_EL1:
787 // only implemented if supporting 7 or more bits of priority
788 break;
789
790 // Active Priorities Group 0 Registers
791 case MISCREG_ICC_AP0R0:
792 case MISCREG_ICC_AP0R0_EL1:
793 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
794 return isa->setMiscRegNoEffect(MISCREG_ICV_AP0R0_EL1, val);
795 }
796
797 break;
798
799 case MISCREG_ICC_AP0R1:
800 case MISCREG_ICC_AP0R1_EL1:
801
802 // only implemented if supporting 6 or more bits of priority
803 case MISCREG_ICC_AP0R2:
804 case MISCREG_ICC_AP0R2_EL1:
805
806 // only implemented if supporting 7 or more bits of priority
807 case MISCREG_ICC_AP0R3:
808 case MISCREG_ICC_AP0R3_EL1:
809 // only implemented if supporting 7 or more bits of priority
810 break;
811
812 // End Of Interrupt Register 0
813 case MISCREG_ICC_EOIR0:
814 case MISCREG_ICC_EOIR0_EL1: { // End Of Interrupt Register 0
815 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
816 return setMiscReg(MISCREG_ICV_EOIR0_EL1, val);
817 }
818
819 int int_id = val & 0xffffff;
820
821 // avoid activation for special interrupts
822 if (int_id >= Gicv3::INTID_SECURE &&
823 int_id <= Gicv3::INTID_SPURIOUS) {
824 return;
825 }
826
827 Gicv3::GroupId group = Gicv3::G0S;
828
829 if (highestActiveGroup() != group) {
830 return;
831 }
832
833 dropPriority(group);
834
835 if (!isEOISplitMode()) {
836 deactivateIRQ(int_id, group);
837 }
838
839 break;
840 }
841
842 // Virtual End Of Interrupt Register 0
843 case MISCREG_ICV_EOIR0_EL1: {
844 int int_id = val & 0xffffff;
845
846 // avoid deactivation for special interrupts
847 if (int_id >= Gicv3::INTID_SECURE &&
848 int_id <= Gicv3::INTID_SPURIOUS) {
849 return;
850 }
851
852 uint8_t drop_prio = virtualDropPriority();
853
854 if (drop_prio == 0xff) {
855 return;
856 }
857
858 int lr_idx = virtualFindActive(int_id);
859
860 if (lr_idx < 0) {
861 // No LR found matching
862 virtualIncrementEOICount();
863 } else {
864 ICH_LR_EL2 ich_lr_el2 =
865 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
866 Gicv3::GroupId lr_group =
867 ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S;
868 uint8_t lr_group_prio = ich_lr_el2.Priority & 0xf8;
869
870 if (lr_group == Gicv3::G0S && lr_group_prio == drop_prio) {
871 //if (!virtualIsEOISplitMode())
872 {
873 virtualDeactivateIRQ(lr_idx);
874 }
875 }
876 }
877
878 virtualUpdate();
879 break;
880 }
881
882 // End Of Interrupt Register 1
883 case MISCREG_ICC_EOIR1:
884 case MISCREG_ICC_EOIR1_EL1: {
885 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
886 return setMiscReg(MISCREG_ICV_EOIR1_EL1, val);
887 }
888
889 int int_id = val & 0xffffff;
890
891 // avoid deactivation for special interrupts
892 if (int_id >= Gicv3::INTID_SECURE &&
893 int_id <= Gicv3::INTID_SPURIOUS) {
894 return;
895 }
896
897 Gicv3::GroupId group = inSecureState() ? Gicv3::G1S : Gicv3::G1NS;
898
899 if (highestActiveGroup() == Gicv3::G0S) {
900 return;
901 }
902
903 if (distributor->DS == 0) {
904 if (highestActiveGroup() == Gicv3::G1S && !inSecureState()) {
905 return;
906 } else if (highestActiveGroup() == Gicv3::G1NS &&
907 !(!inSecureState() or (currEL() == EL3))) {
908 return;
909 }
910 }
911
912 dropPriority(group);
913
914 if (!isEOISplitMode()) {
915 deactivateIRQ(int_id, group);
916 }
917
918 break;
919 }
920
921 // Virtual End Of Interrupt Register 1
922 case MISCREG_ICV_EOIR1_EL1: {
923 int int_id = val & 0xffffff;
924
925 // avoid deactivation for special interrupts
926 if (int_id >= Gicv3::INTID_SECURE &&
927 int_id <= Gicv3::INTID_SPURIOUS) {
928 return;
929 }
930
931 uint8_t drop_prio = virtualDropPriority();
932
933 if (drop_prio == 0xff) {
934 return;
935 }
936
937 int lr_idx = virtualFindActive(int_id);
938
939 if (lr_idx < 0) {
940 // No matching LR found
941 virtualIncrementEOICount();
942 } else {
943 ICH_LR_EL2 ich_lr_el2 =
944 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
945 Gicv3::GroupId lr_group =
946 ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S;
947 uint8_t lr_group_prio = ich_lr_el2.Priority & 0xf8;
948
949 if (lr_group == Gicv3::G1NS && lr_group_prio == drop_prio) {
950 if (!virtualIsEOISplitMode()) {
951 virtualDeactivateIRQ(lr_idx);
952 }
953 }
954 }
955
956 virtualUpdate();
957 break;
958 }
959
960 // Deactivate Interrupt Register
961 case MISCREG_ICC_DIR:
962 case MISCREG_ICC_DIR_EL1: {
963 if ((currEL() == EL1) && !inSecureState() &&
964 (hcr_imo || hcr_fmo)) {
965 return setMiscReg(MISCREG_ICV_DIR_EL1, val);
966 }
967
968 int int_id = val & 0xffffff;
969
970 // The following checks are as per spec pseudocode
971 // aarch64/support/ICC_DIR_EL1
972
973 // Check for spurious ID
974 if (int_id >= Gicv3::INTID_SECURE) {
975 return;
976 }
977
978 // EOI mode is not set, so don't deactivate
979 if (!isEOISplitMode()) {
980 return;
981 }
982
983 Gicv3::GroupId group =
984 int_id >= 32 ? distributor->getIntGroup(int_id) :
985 redistributor->getIntGroup(int_id);
986 bool irq_is_grp0 = group == Gicv3::G0S;
987 bool single_sec_state = distributor->DS;
988 bool irq_is_secure = !single_sec_state && (group != Gicv3::G1NS);
989 SCR scr_el3 = isa->readMiscRegNoEffect(MISCREG_SCR_EL3);
990 bool route_fiq_to_el3 = scr_el3.fiq;
991 bool route_irq_to_el3 = scr_el3.irq;
992 bool route_fiq_to_el2 = hcr_fmo;
993 bool route_irq_to_el2 = hcr_imo;
994
995 switch (currEL()) {
996 case EL3:
997 break;
998
999 case EL2:
1000 if (single_sec_state && irq_is_grp0 && !route_fiq_to_el3) {
1001 break;
1002 }
1003
1004 if (!irq_is_secure && !irq_is_grp0 && !route_irq_to_el3) {
1005 break;
1006 }
1007
1008 return;
1009
1010 case EL1:
1011 if (!isSecureBelowEL3()) {
1012 if (single_sec_state && irq_is_grp0 &&
1013 !route_fiq_to_el3 && !route_fiq_to_el2) {
1014 break;
1015 }
1016
1017 if (!irq_is_secure && !irq_is_grp0 &&
1018 !route_irq_to_el3 && !route_irq_to_el2) {
1019 break;
1020 }
1021 } else {
1022 if (irq_is_grp0 && !route_fiq_to_el3) {
1023 break;
1024 }
1025
1026 if (!irq_is_grp0 &&
1027 (!irq_is_secure || !single_sec_state) &&
1028 !route_irq_to_el3) {
1029 break;
1030 }
1031 }
1032
1033 return;
1034
1035 default:
1036 break;
1037 }
1038
1039 deactivateIRQ(int_id, group);
1040 break;
1041 }
1042
1043 // Deactivate Virtual Interrupt Register
1044 case MISCREG_ICV_DIR_EL1: {
1045 int int_id = val & 0xffffff;
1046
1047 // avoid deactivation for special interrupts
1048 if (int_id >= Gicv3::INTID_SECURE &&
1049 int_id <= Gicv3::INTID_SPURIOUS) {
1050 return;
1051 }
1052
1053 if (!virtualIsEOISplitMode()) {
1054 return;
1055 }
1056
1057 int lr_idx = virtualFindActive(int_id);
1058
1059 if (lr_idx < 0) {
1060 // No matching LR found
1061 virtualIncrementEOICount();
1062 } else {
1063 virtualDeactivateIRQ(lr_idx);
1064 }
1065
1066 virtualUpdate();
1067 break;
1068 }
1069
1070 // Binary Point Register 0
1071 case MISCREG_ICC_BPR0:
1072 case MISCREG_ICC_BPR0_EL1:
1073 // Binary Point Register 1
1074 case MISCREG_ICC_BPR1:
1075 case MISCREG_ICC_BPR1_EL1: {
1076 if ((currEL() == EL1) && !inSecureState()) {
1077 if (misc_reg == MISCREG_ICC_BPR0_EL1 && hcr_fmo) {
1078 return setMiscReg(MISCREG_ICV_BPR0_EL1, val);
1079 } else if (misc_reg == MISCREG_ICC_BPR1_EL1 && hcr_imo) {
1080 return setMiscReg(MISCREG_ICV_BPR1_EL1, val);
1081 }
1082 }
1083
1084 Gicv3::GroupId group =
1085 misc_reg == MISCREG_ICC_BPR0_EL1 ? Gicv3::G0S : Gicv3::G1S;
1086
1087 if (group == Gicv3::G1S && !inSecureState()) {
1088 group = Gicv3::G1NS;
1089 }
1090
1091 ICC_CTLR_EL1 icc_ctlr_el1_s =
1092 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S);
1093
1094 if ((group == Gicv3::G1S) && !isEL3OrMon() &&
1095 icc_ctlr_el1_s.CBPR) {
1096 group = Gicv3::G0S;
1097 }
1098
1099 ICC_CTLR_EL1 icc_ctlr_el1_ns =
1100 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS);
1101
1102 if ((group == Gicv3::G1NS) && (currEL() < EL3) &&
1103 icc_ctlr_el1_ns.CBPR) {
1104 // BPR0 + 1 saturated to 7, WI
1105 return;
1106 }
1107
1108 uint8_t min_val = (group == Gicv3::G1NS) ?
1109 GIC_MIN_BPR_NS : GIC_MIN_BPR;
1110 val &= 0x7;
1111
1112 if (val < min_val) {
1113 val = min_val;
1114 }
1115
1116 break;
1117 }
1118
1119 // Virtual Binary Point Register 0
1120 case MISCREG_ICV_BPR0_EL1:
1121 // Virtual Binary Point Register 1
1122 case MISCREG_ICV_BPR1_EL1: {
1123 Gicv3::GroupId group =
1124 misc_reg == MISCREG_ICV_BPR0_EL1 ? Gicv3::G0S : Gicv3::G1NS;
1125 ICH_VMCR_EL2 ich_vmcr_el2 =
1126 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1127
1128 if ((group == Gicv3::G1NS) && ich_vmcr_el2.VCBPR) {
1129 // BPR0 + 1 saturated to 7, WI
1130 return;
1131 }
1132
1133 uint8_t min_VPBR = 7 - VIRTUAL_PREEMPTION_BITS;
1134
1135 if (group != Gicv3::G0S) {
1136 min_VPBR++;
1137 }
1138
1139 if (val < min_VPBR) {
1140 val = min_VPBR;
1141 }
1142
1143 if (group == Gicv3::G0S) {
1144 ich_vmcr_el2.VBPR0 = val;
1145 } else {
1146 ich_vmcr_el2.VBPR1 = val;
1147 }
1148
1149 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1150 do_virtual_update = true;
1151 break;
1152 }
1153
1154 // Control Register EL1
1155 case MISCREG_ICC_CTLR:
1156 case MISCREG_ICC_CTLR_EL1: {
1157 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) {
1158 return setMiscReg(MISCREG_ICV_CTLR_EL1, val);
1159 }
1160
1161 /*
1162 * ExtRange is RO.
1163 * RSS is RO.
1164 * A3V is RO.
1165 * SEIS is RO.
1166 * IDbits is RO.
1167 * PRIbits is RO.
1168 */
1169 ICC_CTLR_EL1 requested_icc_ctlr_el1 = val;
1170 ICC_CTLR_EL1 icc_ctlr_el1 =
1171 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1);
1172
1173 ICC_CTLR_EL3 icc_ctlr_el3 =
1174 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3);
1175
1176 // The following could be refactored but it is following
1177 // spec description section 9.2.6 point by point.
1178
1179 // PMHE
1180 if (haveEL(EL3)) {
1181 // PMHE is alias of ICC_CTLR_EL3.PMHE
1182
1183 if (distributor->DS == 0) {
1184 // PMHE is RO
1185 } else if (distributor->DS == 1) {
1186 // PMHE is RW
1187 icc_ctlr_el1.PMHE = requested_icc_ctlr_el1.PMHE;
1188 icc_ctlr_el3.PMHE = icc_ctlr_el1.PMHE;
1189 }
1190 } else {
1191 // PMHE is RW (by implementation choice)
1192 icc_ctlr_el1.PMHE = requested_icc_ctlr_el1.PMHE;
1193 }
1194
1195 // EOImode
1196 icc_ctlr_el1.EOImode = requested_icc_ctlr_el1.EOImode;
1197
1198 if (inSecureState()) {
1199 // EOIMode is alias of ICC_CTLR_EL3.EOImode_EL1S
1200 icc_ctlr_el3.EOImode_EL1S = icc_ctlr_el1.EOImode;
1201 } else {
1202 // EOIMode is alias of ICC_CTLR_EL3.EOImode_EL1NS
1203 icc_ctlr_el3.EOImode_EL1NS = icc_ctlr_el1.EOImode;
1204 }
1205
1206 // CBPR
1207 if (haveEL(EL3)) {
1208 // CBPR is alias of ICC_CTLR_EL3.CBPR_EL1{S,NS}
1209
1210 if (distributor->DS == 0) {
1211 // CBPR is RO
1212 } else {
1213 // CBPR is RW
1214 icc_ctlr_el1.CBPR = requested_icc_ctlr_el1.CBPR;
1215
1216 if (inSecureState()) {
1217 icc_ctlr_el3.CBPR_EL1S = icc_ctlr_el1.CBPR;
1218 } else {
1219 icc_ctlr_el3.CBPR_EL1NS = icc_ctlr_el1.CBPR;
1220 }
1221 }
1222 } else {
1223 // CBPR is RW
1224 icc_ctlr_el1.CBPR = requested_icc_ctlr_el1.CBPR;
1225 }
1226
1227 isa->setMiscRegNoEffect(MISCREG_ICC_CTLR_EL3, icc_ctlr_el3);
1228
1229 val = icc_ctlr_el1;
1230 break;
1231 }
1232
1233 // Virtual Control Register
1234 case MISCREG_ICV_CTLR_EL1: {
1235 ICV_CTLR_EL1 requested_icv_ctlr_el1 = val;
1236 ICV_CTLR_EL1 icv_ctlr_el1 =
1237 isa->readMiscRegNoEffect(MISCREG_ICV_CTLR_EL1);
1238 icv_ctlr_el1.EOImode = requested_icv_ctlr_el1.EOImode;
1239 icv_ctlr_el1.CBPR = requested_icv_ctlr_el1.CBPR;
1240 val = icv_ctlr_el1;
1241
1242 // Aliases
1243 // ICV_CTLR_EL1.CBPR aliases ICH_VMCR_EL2.VCBPR.
1244 // ICV_CTLR_EL1.EOImode aliases ICH_VMCR_EL2.VEOIM.
1245 ICH_VMCR_EL2 ich_vmcr_el2 =
1246 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1247 ich_vmcr_el2.VCBPR = icv_ctlr_el1.CBPR;
1248 ich_vmcr_el2.VEOIM = icv_ctlr_el1.EOImode;
1249 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1250 break;
1251 }
1252
1253 // Control Register EL3
1254 case MISCREG_ICC_MCTLR:
1255 case MISCREG_ICC_CTLR_EL3: {
1256 /*
1257 * ExtRange is RO.
1258 * RSS is RO.
1259 * nDS is RO.
1260 * A3V is RO.
1261 * SEIS is RO.
1262 * IDbits is RO.
1263 * PRIbits is RO.
1264 * PMHE is RAO/WI, priority-based routing is always used.
1265 */
1266 ICC_CTLR_EL3 requested_icc_ctlr_el3 = val;
1267
1268 // Aliases
1269 if (haveEL(EL3))
1270 {
1271 ICC_CTLR_EL1 icc_ctlr_el1_s =
1272 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S);
1273 ICC_CTLR_EL1 icc_ctlr_el1_ns =
1274 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS);
1275
1276 // ICC_CTLR_EL1(NS).EOImode is an alias of
1277 // ICC_CTLR_EL3.EOImode_EL1NS
1278 icc_ctlr_el1_ns.EOImode = requested_icc_ctlr_el3.EOImode_EL1NS;
1279 // ICC_CTLR_EL1(S).EOImode is an alias of
1280 // ICC_CTLR_EL3.EOImode_EL1S
1281 icc_ctlr_el1_s.EOImode = requested_icc_ctlr_el3.EOImode_EL1S;
1282 // ICC_CTLR_EL1(NS).CBPR is an alias of ICC_CTLR_EL3.CBPR_EL1NS
1283 icc_ctlr_el1_ns.CBPR = requested_icc_ctlr_el3.CBPR_EL1NS;
1284 // ICC_CTLR_EL1(S).CBPR is an alias of ICC_CTLR_EL3.CBPR_EL1S
1285 icc_ctlr_el1_s.CBPR = requested_icc_ctlr_el3.CBPR_EL1S;
1286
1287 isa->setMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S, icc_ctlr_el1_s);
1288 isa->setMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS,
1289 icc_ctlr_el1_ns);
1290 }
1291
1292 ICC_CTLR_EL3 icc_ctlr_el3 =
1293 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3);
1294
1295 icc_ctlr_el3.RM = requested_icc_ctlr_el3.RM;
1296 icc_ctlr_el3.EOImode_EL1NS = requested_icc_ctlr_el3.EOImode_EL1NS;
1297 icc_ctlr_el3.EOImode_EL1S = requested_icc_ctlr_el3.EOImode_EL1S;
1298 icc_ctlr_el3.EOImode_EL3 = requested_icc_ctlr_el3.EOImode_EL3;
1299 icc_ctlr_el3.CBPR_EL1NS = requested_icc_ctlr_el3.CBPR_EL1NS;
1300 icc_ctlr_el3.CBPR_EL1S = requested_icc_ctlr_el3.CBPR_EL1S;
1301
1302 val = icc_ctlr_el3;
1303 break;
1304 }
1305
1306 // Priority Mask Register
1307 case MISCREG_ICC_PMR:
1308 case MISCREG_ICC_PMR_EL1: {
1309 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) {
1310 return setMiscReg(MISCREG_ICV_PMR_EL1, val);
1311 }
1312
1313 val &= 0xff;
1314 SCR scr_el3 = isa->readMiscRegNoEffect(MISCREG_SCR_EL3);
1315
1316 if (haveEL(EL3) && !inSecureState() && (scr_el3.fiq)) {
1317 // Spec section 4.8.1
1318 // For Non-secure access to ICC_PMR_EL1 SCR_EL3.FIQ == 1:
1319 RegVal old_icc_pmr_el1 =
1320 isa->readMiscRegNoEffect(MISCREG_ICC_PMR_EL1);
1321
1322 if (!(old_icc_pmr_el1 & 0x80)) {
1323 // If the current priority mask value is in the range of
1324 // 0x00-0x7F then WI
1325 return;
1326 }
1327
1328 // If the current priority mask value is in the range of
1329 // 0x80-0xFF then a write access to ICC_PMR_EL1 succeeds,
1330 // based on the Non-secure read of the priority mask value
1331 // written to the register.
1332
1333 val = (val >> 1) | 0x80;
1334 }
1335
1336 val &= ~0U << (8 - PRIORITY_BITS);
1337 break;
1338 }
1339
1340 case MISCREG_ICV_PMR_EL1: { // Priority Mask Register
1341 ICH_VMCR_EL2 ich_vmcr_el2 =
1342 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1343 ich_vmcr_el2.VPMR = val & 0xff;
1344
1345 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1346 virtualUpdate();
1347 return;
1348 }
1349
1350 // Interrupt Group 0 Enable Register EL1
1351 case MISCREG_ICC_IGRPEN0:
1352 case MISCREG_ICC_IGRPEN0_EL1: {
1353 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
1354 return setMiscReg(MISCREG_ICV_IGRPEN0_EL1, val);
1355 }
1356
1357 break;
1358 }
1359
1360 // Virtual Interrupt Group 0 Enable register
1361 case MISCREG_ICV_IGRPEN0_EL1: {
1362 bool enable = val & 0x1;
1363 ICH_VMCR_EL2 ich_vmcr_el2 =
1364 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1365 ich_vmcr_el2.VENG0 = enable;
1366 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1367 virtualUpdate();
1368 return;
1369 }
1370
1371 // Interrupt Group 1 Enable register EL1
1372 case MISCREG_ICC_IGRPEN1:
1373 case MISCREG_ICC_IGRPEN1_EL1: {
1374 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
1375 return setMiscReg(MISCREG_ICV_IGRPEN1_EL1, val);
1376 }
1377
1378 if (haveEL(EL3)) {
1379 ICC_IGRPEN1_EL1 icc_igrpen1_el1 = val;
1380 ICC_IGRPEN1_EL3 icc_igrpen1_el3 =
1381 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL3);
1382
1383 if (inSecureState()) {
1384 // Enable is RW alias of ICC_IGRPEN1_EL3.EnableGrp1S
1385 icc_igrpen1_el3.EnableGrp1S = icc_igrpen1_el1.Enable;
1386 } else {
1387 // Enable is RW alias of ICC_IGRPEN1_EL3.EnableGrp1NS
1388 icc_igrpen1_el3.EnableGrp1NS = icc_igrpen1_el1.Enable;
1389 }
1390
1391 isa->setMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL3,
1392 icc_igrpen1_el3);
1393 }
1394
1395 break;
1396 }
1397
1398 // Virtual Interrupt Group 1 Enable register
1399 case MISCREG_ICV_IGRPEN1_EL1: {
1400 bool enable = val & 0x1;
1401 ICH_VMCR_EL2 ich_vmcr_el2 =
1402 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1403 ich_vmcr_el2.VENG1 = enable;
1404 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1405 virtualUpdate();
1406 return;
1407 }
1408
1409 // Interrupt Group 1 Enable register
1410 case MISCREG_ICC_MGRPEN1:
1411 case MISCREG_ICC_IGRPEN1_EL3: {
1412 ICC_IGRPEN1_EL3 icc_igrpen1_el3 = val;
1413 ICC_IGRPEN1_EL1 icc_igrpen1_el1 =
1414 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1);
1415
1416 if (inSecureState()) {
1417 // ICC_IGRPEN1_EL1.Enable is RW alias of EnableGrp1S
1418 icc_igrpen1_el1.Enable = icc_igrpen1_el3.EnableGrp1S;
1419 } else {
1420 // ICC_IGRPEN1_EL1.Enable is RW alias of EnableGrp1NS
1421 icc_igrpen1_el1.Enable = icc_igrpen1_el3.EnableGrp1NS;
1422 }
1423
1424 isa->setMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1, icc_igrpen1_el1);
1425 break;
1426 }
1427
1428 // Software Generated Interrupt Group 0 Register
1429 case MISCREG_ICC_SGI0R:
1430 case MISCREG_ICC_SGI0R_EL1:
|
| 1431 generateSGI(val, Gicv3::G0S);
1432 break;
|
1419
1420 // Software Generated Interrupt Group 1 Register
1421 case MISCREG_ICC_SGI1R:
| 1433
1434 // Software Generated Interrupt Group 1 Register
1435 case MISCREG_ICC_SGI1R:
|
1422 case MISCREG_ICC_SGI1R_EL1:
| 1436 case MISCREG_ICC_SGI1R_EL1: {
1437 Gicv3::GroupId group = inSecureState() ? Gicv3::G1S : Gicv3::G1NS;
|
1423
| 1438
|
| 1439 generateSGI(val, group);
1440 break;
1441 }
1442
|
1424 // Alias Software Generated Interrupt Group 1 Register
1425 case MISCREG_ICC_ASGI1R:
1426 case MISCREG_ICC_ASGI1R_EL1: {
| 1443 // Alias Software Generated Interrupt Group 1 Register
1444 case MISCREG_ICC_ASGI1R:
1445 case MISCREG_ICC_ASGI1R_EL1: {
|
1427 bool ns = !inSecureState();
1428 Gicv3::GroupId group;
| 1446 Gicv3::GroupId group = inSecureState() ? Gicv3::G1NS : Gicv3::G1S;
|
1429
| 1447
|
1430 if (misc_reg == MISCREG_ICC_SGI1R_EL1) {
1431 group = ns ? Gicv3::G1NS : Gicv3::G1S;
1432 } else if (misc_reg == MISCREG_ICC_ASGI1R_EL1) {
1433 group = ns ? Gicv3::G1S : Gicv3::G1NS;
1434 } else {
1435 group = Gicv3::G0S;
1436 }
1437
1438 if (distributor->DS && group == Gicv3::G1S) {
1439 group = Gicv3::G0S;
1440 }
1441
1442 uint8_t aff3 = bits(val, 55, 48);
1443 uint8_t aff2 = bits(val, 39, 32);
1444 uint8_t aff1 = bits(val, 23, 16);;
1445 uint16_t target_list = bits(val, 15, 0);
1446 uint32_t int_id = bits(val, 27, 24);
1447 bool irm = bits(val, 40, 40);
1448 uint8_t rs = bits(val, 47, 44);
1449
1450 for (int i = 0; i < gic->getSystem()->numContexts(); i++) {
1451 Gicv3Redistributor * redistributor_i =
1452 gic->getRedistributor(i);
1453 uint32_t affinity_i = redistributor_i->getAffinity();
1454
1455 if (irm) {
1456 // Interrupts routed to all PEs in the system,
1457 // excluding "self"
1458 if (affinity_i == redistributor->getAffinity()) {
1459 continue;
1460 }
1461 } else {
1462 // Interrupts routed to the PEs specified by
1463 // Aff3.Aff2.Aff1.<target list>
1464 if ((affinity_i >> 8) !=
1465 ((aff3 << 16) | (aff2 << 8) | (aff1 << 0))) {
1466 continue;
1467 }
1468
1469 uint8_t aff0_i = bits(affinity_i, 7, 0);
1470
1471 if (!(aff0_i >= rs * 16 && aff0_i < (rs + 1) * 16 &&
1472 ((0x1 << (aff0_i - rs * 16)) & target_list))) {
1473 continue;
1474 }
1475 }
1476
1477 redistributor_i->sendSGI(int_id, group, ns);
1478 }
1479
1480 break;
| 1448 generateSGI(val, group);
1449 break;
|
1481 }
1482
1483 // System Register Enable Register EL1
1484 case MISCREG_ICC_SRE:
1485 case MISCREG_ICC_SRE_EL1:
1486 // System Register Enable Register EL2
1487 case MISCREG_ICC_HSRE:
1488 case MISCREG_ICC_SRE_EL2:
1489 // System Register Enable Register EL3
1490 case MISCREG_ICC_MSRE:
1491 case MISCREG_ICC_SRE_EL3:
1492 // All bits are RAO/WI
1493 return;
1494
1495 // Hyp Control Register
1496 case MISCREG_ICH_HCR:
1497 case MISCREG_ICH_HCR_EL2: {
1498 ICH_HCR_EL2 requested_ich_hcr_el2 = val;
1499 ICH_HCR_EL2 ich_hcr_el2 =
1500 isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
1501
1502 if (requested_ich_hcr_el2.EOIcount >= ich_hcr_el2.EOIcount)
1503 {
1504 // EOIcount - Permitted behaviors are:
1505 // - Increment EOIcount.
1506 // - Leave EOIcount unchanged.
1507 ich_hcr_el2.EOIcount = requested_ich_hcr_el2.EOIcount;
1508 }
1509
1510 ich_hcr_el2.TDIR = requested_ich_hcr_el2.TDIR;
1511 ich_hcr_el2.TSEI = requested_ich_hcr_el2.TSEI;
1512 ich_hcr_el2.TALL1 = requested_ich_hcr_el2.TALL1;;
1513 ich_hcr_el2.TALL0 = requested_ich_hcr_el2.TALL0;;
1514 ich_hcr_el2.TC = requested_ich_hcr_el2.TC;
1515 ich_hcr_el2.VGrp1DIE = requested_ich_hcr_el2.VGrp1DIE;
1516 ich_hcr_el2.VGrp1EIE = requested_ich_hcr_el2.VGrp1EIE;
1517 ich_hcr_el2.VGrp0DIE = requested_ich_hcr_el2.VGrp0DIE;
1518 ich_hcr_el2.VGrp0EIE = requested_ich_hcr_el2.VGrp0EIE;
1519 ich_hcr_el2.NPIE = requested_ich_hcr_el2.NPIE;
1520 ich_hcr_el2.LRENPIE = requested_ich_hcr_el2.LRENPIE;
1521 ich_hcr_el2.UIE = requested_ich_hcr_el2.UIE;
1522 ich_hcr_el2.En = requested_ich_hcr_el2.En;
1523 val = ich_hcr_el2;
1524 do_virtual_update = true;
1525 break;
1526 }
1527
1528 // List Registers
1529 case MISCREG_ICH_LRC0 ... MISCREG_ICH_LRC15: {
1530 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 high half part)
1531 ICH_LRC requested_ich_lrc = val;
1532 ICH_LRC ich_lrc = isa->readMiscRegNoEffect(misc_reg);
1533
1534 ich_lrc.State = requested_ich_lrc.State;
1535 ich_lrc.HW = requested_ich_lrc.HW;
1536 ich_lrc.Group = requested_ich_lrc.Group;
1537
1538 // Priority, bits [23:16]
1539 // At least five bits must be implemented.
1540 // Unimplemented bits are RES0 and start from bit[16] up to bit[18].
1541 // We implement 5 bits.
1542 ich_lrc.Priority = (requested_ich_lrc.Priority & 0xf8) |
1543 (ich_lrc.Priority & 0x07);
1544
1545 // pINTID, bits [12:0]
1546 // When ICH_LR<n>.HW is 0 this field has the following meaning:
1547 // - Bits[12:10] : RES0.
1548 // - Bit[9] : EOI.
1549 // - Bits[8:0] : RES0.
1550 // When ICH_LR<n>.HW is 1:
1551 // - This field is only required to implement enough bits to hold a
1552 // valid value for the implemented INTID size. Any unused higher
1553 // order bits are RES0.
1554 if (requested_ich_lrc.HW == 0) {
1555 ich_lrc.EOI = requested_ich_lrc.EOI;
1556 } else {
1557 ich_lrc.pINTID = requested_ich_lrc.pINTID;
1558 }
1559
1560 val = ich_lrc;
1561 do_virtual_update = true;
1562 break;
1563 }
1564
1565 // List Registers
1566 case MISCREG_ICH_LR0 ... MISCREG_ICH_LR15: {
1567 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 low half part)
1568 RegVal old_val = isa->readMiscRegNoEffect(misc_reg);
1569 val = (old_val & 0xffffffff00000000) | (val & 0xffffffff);
1570 do_virtual_update = true;
1571 break;
1572 }
1573
1574 // List Registers
1575 case MISCREG_ICH_LR0_EL2 ... MISCREG_ICH_LR15_EL2: { // AArch64
1576 ICH_LR_EL2 requested_ich_lr_el2 = val;
1577 ICH_LR_EL2 ich_lr_el2 = isa->readMiscRegNoEffect(misc_reg);
1578
1579 ich_lr_el2.State = requested_ich_lr_el2.State;
1580 ich_lr_el2.HW = requested_ich_lr_el2.HW;
1581 ich_lr_el2.Group = requested_ich_lr_el2.Group;
1582
1583 // Priority, bits [55:48]
1584 // At least five bits must be implemented.
1585 // Unimplemented bits are RES0 and start from bit[48] up to bit[50].
1586 // We implement 5 bits.
1587 ich_lr_el2.Priority = (requested_ich_lr_el2.Priority & 0xf8) |
1588 (ich_lr_el2.Priority & 0x07);
1589
1590 // pINTID, bits [44:32]
1591 // When ICH_LR<n>_EL2.HW is 0 this field has the following meaning:
1592 // - Bits[44:42] : RES0.
1593 // - Bit[41] : EOI.
1594 // - Bits[40:32] : RES0.
1595 // When ICH_LR<n>_EL2.HW is 1:
1596 // - This field is only required to implement enough bits to hold a
1597 // valid value for the implemented INTID size. Any unused higher
1598 // order bits are RES0.
1599 if (requested_ich_lr_el2.HW == 0) {
1600 ich_lr_el2.EOI = requested_ich_lr_el2.EOI;
1601 } else {
1602 ich_lr_el2.pINTID = requested_ich_lr_el2.pINTID;
1603 }
1604
1605 // vINTID, bits [31:0]
1606 // It is IMPLEMENTATION DEFINED how many bits are implemented,
1607 // though at least 16 bits must be implemented.
1608 // Unimplemented bits are RES0.
1609 ich_lr_el2.vINTID = requested_ich_lr_el2.vINTID;
1610
1611 val = ich_lr_el2;
1612 do_virtual_update = true;
1613 break;
1614 }
1615
1616 // Virtual Machine Control Register
1617 case MISCREG_ICH_VMCR:
1618 case MISCREG_ICH_VMCR_EL2: {
1619 ICH_VMCR_EL2 requested_ich_vmcr_el2 = val;
1620 ICH_VMCR_EL2 ich_vmcr_el2 =
1621 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1622 ich_vmcr_el2.VPMR = requested_ich_vmcr_el2.VPMR;
1623 uint8_t min_vpr0 = 7 - VIRTUAL_PREEMPTION_BITS;
1624
1625 if (requested_ich_vmcr_el2.VBPR0 < min_vpr0) {
1626 ich_vmcr_el2.VBPR0 = min_vpr0;
1627 } else {
1628 ich_vmcr_el2.VBPR0 = requested_ich_vmcr_el2.VBPR0;
1629 }
1630
1631 uint8_t min_vpr1 = min_vpr0 + 1;
1632
1633 if (requested_ich_vmcr_el2.VBPR1 < min_vpr1) {
1634 ich_vmcr_el2.VBPR1 = min_vpr1;
1635 } else {
1636 ich_vmcr_el2.VBPR1 = requested_ich_vmcr_el2.VBPR1;
1637 }
1638
1639 ich_vmcr_el2.VEOIM = requested_ich_vmcr_el2.VEOIM;
1640 ich_vmcr_el2.VCBPR = requested_ich_vmcr_el2.VCBPR;
1641 ich_vmcr_el2.VENG1 = requested_ich_vmcr_el2.VENG1;
1642 ich_vmcr_el2.VENG0 = requested_ich_vmcr_el2.VENG0;
1643 val = ich_vmcr_el2;
1644 break;
1645 }
1646
1647 // Hyp Active Priorities Group 0 Registers
1648 case MISCREG_ICH_AP0R0 ... MISCREG_ICH_AP0R3:
1649 case MISCREG_ICH_AP0R0_EL2 ... MISCREG_ICH_AP0R3_EL2:
1650 // Hyp Active Priorities Group 1 Registers
1651 case MISCREG_ICH_AP1R0 ... MISCREG_ICH_AP1R3:
1652 case MISCREG_ICH_AP1R0_EL2 ... MISCREG_ICH_AP1R3_EL2:
1653 break;
1654
1655 default:
1656 panic("Gicv3CPUInterface::setMiscReg(): unknown register %d (%s)",
1657 misc_reg, miscRegName[misc_reg]);
1658 }
1659
1660 isa->setMiscRegNoEffect(misc_reg, val);
1661
1662 if (do_virtual_update) {
1663 virtualUpdate();
1664 }
1665}
1666
1667int
1668Gicv3CPUInterface::virtualFindActive(uint32_t int_id) const
1669{
1670 for (uint32_t lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) {
1671 ICH_LR_EL2 ich_lr_el2 =
1672 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
1673
1674 if (((ich_lr_el2.State == ICH_LR_EL2_STATE_ACTIVE) ||
1675 (ich_lr_el2.State == ICH_LR_EL2_STATE_ACTIVE_PENDING)) &&
1676 (ich_lr_el2.vINTID == int_id)) {
1677 return lr_idx;
1678 }
1679 }
1680
1681 return -1;
1682}
1683
1684uint32_t
1685Gicv3CPUInterface::getHPPIR0() const
1686{
1687 if (hppi.prio == 0xff) {
1688 return Gicv3::INTID_SPURIOUS;
1689 }
1690
1691 bool irq_is_secure = !distributor->DS && hppi.group != Gicv3::G1NS;
1692
1693 if ((hppi.group != Gicv3::G0S) && isEL3OrMon()) {
1694 // interrupt for the other state pending
1695 return irq_is_secure ? Gicv3::INTID_SECURE : Gicv3::INTID_NONSECURE;
1696 }
1697
1698 if ((hppi.group != Gicv3::G0S)) { // && !isEL3OrMon())
1699 return Gicv3::INTID_SPURIOUS;
1700 }
1701
1702 if (irq_is_secure && !inSecureState()) {
1703 // Secure interrupts not visible in Non-secure
1704 return Gicv3::INTID_SPURIOUS;
1705 }
1706
1707 return hppi.intid;
1708}
1709
1710uint32_t
1711Gicv3CPUInterface::getHPPIR1() const
1712{
1713 if (hppi.prio == 0xff) {
1714 return Gicv3::INTID_SPURIOUS;
1715 }
1716
1717 ICC_CTLR_EL3 icc_ctlr_el3 = isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3);
1718 if ((currEL() == EL3) && icc_ctlr_el3.RM) {
1719 if (hppi.group == Gicv3::G0S) {
1720 return Gicv3::INTID_SECURE;
1721 } else if (hppi.group == Gicv3::G1NS) {
1722 return Gicv3::INTID_NONSECURE;
1723 }
1724 }
1725
1726 if (hppi.group == Gicv3::G0S) {
1727 return Gicv3::INTID_SPURIOUS;
1728 }
1729
1730 bool irq_is_secure = (distributor->DS == 0) && (hppi.group != Gicv3::G1NS);
1731
1732 if (irq_is_secure) {
1733 if (!inSecureState()) {
1734 // Secure interrupts not visible in Non-secure
1735 return Gicv3::INTID_SPURIOUS;
1736 }
1737 } else if (!isEL3OrMon() && inSecureState()) {
1738 // Group 1 non-secure interrupts not visible in Secure EL1
1739 return Gicv3::INTID_SPURIOUS;
1740 }
1741
1742 return hppi.intid;
1743}
1744
1745void
1746Gicv3CPUInterface::dropPriority(Gicv3::GroupId group)
1747{
1748 int apr_misc_reg;
1749 RegVal apr;
1750 apr_misc_reg = group == Gicv3::G0S ?
1751 MISCREG_ICC_AP0R0_EL1 : MISCREG_ICC_AP1R0_EL1;
1752 apr = isa->readMiscRegNoEffect(apr_misc_reg);
1753
1754 if (apr) {
1755 apr &= apr - 1;
1756 isa->setMiscRegNoEffect(apr_misc_reg, apr);
1757 }
1758
1759 update();
1760}
1761
1762uint8_t
1763Gicv3CPUInterface::virtualDropPriority()
1764{
1765 int apr_max = 1 << (VIRTUAL_PREEMPTION_BITS - 5);
1766
1767 for (int i = 0; i < apr_max; i++) {
1768 RegVal vapr0 = isa->readMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i);
1769 RegVal vapr1 = isa->readMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i);
1770
1771 if (!vapr0 && !vapr1) {
1772 continue;
1773 }
1774
1775 int vapr0_count = ctz32(vapr0);
1776 int vapr1_count = ctz32(vapr1);
1777
1778 if (vapr0_count <= vapr1_count) {
1779 vapr0 &= vapr0 - 1;
1780 isa->setMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i, vapr0);
1781 return (vapr0_count + i * 32) << (GIC_MIN_VBPR + 1);
1782 } else {
1783 vapr1 &= vapr1 - 1;
1784 isa->setMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i, vapr1);
1785 return (vapr1_count + i * 32) << (GIC_MIN_VBPR + 1);
1786 }
1787 }
1788
1789 return 0xff;
1790}
1791
1792void
| 1450 }
1451
1452 // System Register Enable Register EL1
1453 case MISCREG_ICC_SRE:
1454 case MISCREG_ICC_SRE_EL1:
1455 // System Register Enable Register EL2
1456 case MISCREG_ICC_HSRE:
1457 case MISCREG_ICC_SRE_EL2:
1458 // System Register Enable Register EL3
1459 case MISCREG_ICC_MSRE:
1460 case MISCREG_ICC_SRE_EL3:
1461 // All bits are RAO/WI
1462 return;
1463
1464 // Hyp Control Register
1465 case MISCREG_ICH_HCR:
1466 case MISCREG_ICH_HCR_EL2: {
1467 ICH_HCR_EL2 requested_ich_hcr_el2 = val;
1468 ICH_HCR_EL2 ich_hcr_el2 =
1469 isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
1470
1471 if (requested_ich_hcr_el2.EOIcount >= ich_hcr_el2.EOIcount)
1472 {
1473 // EOIcount - Permitted behaviors are:
1474 // - Increment EOIcount.
1475 // - Leave EOIcount unchanged.
1476 ich_hcr_el2.EOIcount = requested_ich_hcr_el2.EOIcount;
1477 }
1478
1479 ich_hcr_el2.TDIR = requested_ich_hcr_el2.TDIR;
1480 ich_hcr_el2.TSEI = requested_ich_hcr_el2.TSEI;
1481 ich_hcr_el2.TALL1 = requested_ich_hcr_el2.TALL1;;
1482 ich_hcr_el2.TALL0 = requested_ich_hcr_el2.TALL0;;
1483 ich_hcr_el2.TC = requested_ich_hcr_el2.TC;
1484 ich_hcr_el2.VGrp1DIE = requested_ich_hcr_el2.VGrp1DIE;
1485 ich_hcr_el2.VGrp1EIE = requested_ich_hcr_el2.VGrp1EIE;
1486 ich_hcr_el2.VGrp0DIE = requested_ich_hcr_el2.VGrp0DIE;
1487 ich_hcr_el2.VGrp0EIE = requested_ich_hcr_el2.VGrp0EIE;
1488 ich_hcr_el2.NPIE = requested_ich_hcr_el2.NPIE;
1489 ich_hcr_el2.LRENPIE = requested_ich_hcr_el2.LRENPIE;
1490 ich_hcr_el2.UIE = requested_ich_hcr_el2.UIE;
1491 ich_hcr_el2.En = requested_ich_hcr_el2.En;
1492 val = ich_hcr_el2;
1493 do_virtual_update = true;
1494 break;
1495 }
1496
1497 // List Registers
1498 case MISCREG_ICH_LRC0 ... MISCREG_ICH_LRC15: {
1499 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 high half part)
1500 ICH_LRC requested_ich_lrc = val;
1501 ICH_LRC ich_lrc = isa->readMiscRegNoEffect(misc_reg);
1502
1503 ich_lrc.State = requested_ich_lrc.State;
1504 ich_lrc.HW = requested_ich_lrc.HW;
1505 ich_lrc.Group = requested_ich_lrc.Group;
1506
1507 // Priority, bits [23:16]
1508 // At least five bits must be implemented.
1509 // Unimplemented bits are RES0 and start from bit[16] up to bit[18].
1510 // We implement 5 bits.
1511 ich_lrc.Priority = (requested_ich_lrc.Priority & 0xf8) |
1512 (ich_lrc.Priority & 0x07);
1513
1514 // pINTID, bits [12:0]
1515 // When ICH_LR<n>.HW is 0 this field has the following meaning:
1516 // - Bits[12:10] : RES0.
1517 // - Bit[9] : EOI.
1518 // - Bits[8:0] : RES0.
1519 // When ICH_LR<n>.HW is 1:
1520 // - This field is only required to implement enough bits to hold a
1521 // valid value for the implemented INTID size. Any unused higher
1522 // order bits are RES0.
1523 if (requested_ich_lrc.HW == 0) {
1524 ich_lrc.EOI = requested_ich_lrc.EOI;
1525 } else {
1526 ich_lrc.pINTID = requested_ich_lrc.pINTID;
1527 }
1528
1529 val = ich_lrc;
1530 do_virtual_update = true;
1531 break;
1532 }
1533
1534 // List Registers
1535 case MISCREG_ICH_LR0 ... MISCREG_ICH_LR15: {
1536 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 low half part)
1537 RegVal old_val = isa->readMiscRegNoEffect(misc_reg);
1538 val = (old_val & 0xffffffff00000000) | (val & 0xffffffff);
1539 do_virtual_update = true;
1540 break;
1541 }
1542
1543 // List Registers
1544 case MISCREG_ICH_LR0_EL2 ... MISCREG_ICH_LR15_EL2: { // AArch64
1545 ICH_LR_EL2 requested_ich_lr_el2 = val;
1546 ICH_LR_EL2 ich_lr_el2 = isa->readMiscRegNoEffect(misc_reg);
1547
1548 ich_lr_el2.State = requested_ich_lr_el2.State;
1549 ich_lr_el2.HW = requested_ich_lr_el2.HW;
1550 ich_lr_el2.Group = requested_ich_lr_el2.Group;
1551
1552 // Priority, bits [55:48]
1553 // At least five bits must be implemented.
1554 // Unimplemented bits are RES0 and start from bit[48] up to bit[50].
1555 // We implement 5 bits.
1556 ich_lr_el2.Priority = (requested_ich_lr_el2.Priority & 0xf8) |
1557 (ich_lr_el2.Priority & 0x07);
1558
1559 // pINTID, bits [44:32]
1560 // When ICH_LR<n>_EL2.HW is 0 this field has the following meaning:
1561 // - Bits[44:42] : RES0.
1562 // - Bit[41] : EOI.
1563 // - Bits[40:32] : RES0.
1564 // When ICH_LR<n>_EL2.HW is 1:
1565 // - This field is only required to implement enough bits to hold a
1566 // valid value for the implemented INTID size. Any unused higher
1567 // order bits are RES0.
1568 if (requested_ich_lr_el2.HW == 0) {
1569 ich_lr_el2.EOI = requested_ich_lr_el2.EOI;
1570 } else {
1571 ich_lr_el2.pINTID = requested_ich_lr_el2.pINTID;
1572 }
1573
1574 // vINTID, bits [31:0]
1575 // It is IMPLEMENTATION DEFINED how many bits are implemented,
1576 // though at least 16 bits must be implemented.
1577 // Unimplemented bits are RES0.
1578 ich_lr_el2.vINTID = requested_ich_lr_el2.vINTID;
1579
1580 val = ich_lr_el2;
1581 do_virtual_update = true;
1582 break;
1583 }
1584
1585 // Virtual Machine Control Register
1586 case MISCREG_ICH_VMCR:
1587 case MISCREG_ICH_VMCR_EL2: {
1588 ICH_VMCR_EL2 requested_ich_vmcr_el2 = val;
1589 ICH_VMCR_EL2 ich_vmcr_el2 =
1590 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1591 ich_vmcr_el2.VPMR = requested_ich_vmcr_el2.VPMR;
1592 uint8_t min_vpr0 = 7 - VIRTUAL_PREEMPTION_BITS;
1593
1594 if (requested_ich_vmcr_el2.VBPR0 < min_vpr0) {
1595 ich_vmcr_el2.VBPR0 = min_vpr0;
1596 } else {
1597 ich_vmcr_el2.VBPR0 = requested_ich_vmcr_el2.VBPR0;
1598 }
1599
1600 uint8_t min_vpr1 = min_vpr0 + 1;
1601
1602 if (requested_ich_vmcr_el2.VBPR1 < min_vpr1) {
1603 ich_vmcr_el2.VBPR1 = min_vpr1;
1604 } else {
1605 ich_vmcr_el2.VBPR1 = requested_ich_vmcr_el2.VBPR1;
1606 }
1607
1608 ich_vmcr_el2.VEOIM = requested_ich_vmcr_el2.VEOIM;
1609 ich_vmcr_el2.VCBPR = requested_ich_vmcr_el2.VCBPR;
1610 ich_vmcr_el2.VENG1 = requested_ich_vmcr_el2.VENG1;
1611 ich_vmcr_el2.VENG0 = requested_ich_vmcr_el2.VENG0;
1612 val = ich_vmcr_el2;
1613 break;
1614 }
1615
1616 // Hyp Active Priorities Group 0 Registers
1617 case MISCREG_ICH_AP0R0 ... MISCREG_ICH_AP0R3:
1618 case MISCREG_ICH_AP0R0_EL2 ... MISCREG_ICH_AP0R3_EL2:
1619 // Hyp Active Priorities Group 1 Registers
1620 case MISCREG_ICH_AP1R0 ... MISCREG_ICH_AP1R3:
1621 case MISCREG_ICH_AP1R0_EL2 ... MISCREG_ICH_AP1R3_EL2:
1622 break;
1623
1624 default:
1625 panic("Gicv3CPUInterface::setMiscReg(): unknown register %d (%s)",
1626 misc_reg, miscRegName[misc_reg]);
1627 }
1628
1629 isa->setMiscRegNoEffect(misc_reg, val);
1630
1631 if (do_virtual_update) {
1632 virtualUpdate();
1633 }
1634}
1635
1636int
1637Gicv3CPUInterface::virtualFindActive(uint32_t int_id) const
1638{
1639 for (uint32_t lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) {
1640 ICH_LR_EL2 ich_lr_el2 =
1641 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
1642
1643 if (((ich_lr_el2.State == ICH_LR_EL2_STATE_ACTIVE) ||
1644 (ich_lr_el2.State == ICH_LR_EL2_STATE_ACTIVE_PENDING)) &&
1645 (ich_lr_el2.vINTID == int_id)) {
1646 return lr_idx;
1647 }
1648 }
1649
1650 return -1;
1651}
1652
1653uint32_t
1654Gicv3CPUInterface::getHPPIR0() const
1655{
1656 if (hppi.prio == 0xff) {
1657 return Gicv3::INTID_SPURIOUS;
1658 }
1659
1660 bool irq_is_secure = !distributor->DS && hppi.group != Gicv3::G1NS;
1661
1662 if ((hppi.group != Gicv3::G0S) && isEL3OrMon()) {
1663 // interrupt for the other state pending
1664 return irq_is_secure ? Gicv3::INTID_SECURE : Gicv3::INTID_NONSECURE;
1665 }
1666
1667 if ((hppi.group != Gicv3::G0S)) { // && !isEL3OrMon())
1668 return Gicv3::INTID_SPURIOUS;
1669 }
1670
1671 if (irq_is_secure && !inSecureState()) {
1672 // Secure interrupts not visible in Non-secure
1673 return Gicv3::INTID_SPURIOUS;
1674 }
1675
1676 return hppi.intid;
1677}
1678
1679uint32_t
1680Gicv3CPUInterface::getHPPIR1() const
1681{
1682 if (hppi.prio == 0xff) {
1683 return Gicv3::INTID_SPURIOUS;
1684 }
1685
1686 ICC_CTLR_EL3 icc_ctlr_el3 = isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3);
1687 if ((currEL() == EL3) && icc_ctlr_el3.RM) {
1688 if (hppi.group == Gicv3::G0S) {
1689 return Gicv3::INTID_SECURE;
1690 } else if (hppi.group == Gicv3::G1NS) {
1691 return Gicv3::INTID_NONSECURE;
1692 }
1693 }
1694
1695 if (hppi.group == Gicv3::G0S) {
1696 return Gicv3::INTID_SPURIOUS;
1697 }
1698
1699 bool irq_is_secure = (distributor->DS == 0) && (hppi.group != Gicv3::G1NS);
1700
1701 if (irq_is_secure) {
1702 if (!inSecureState()) {
1703 // Secure interrupts not visible in Non-secure
1704 return Gicv3::INTID_SPURIOUS;
1705 }
1706 } else if (!isEL3OrMon() && inSecureState()) {
1707 // Group 1 non-secure interrupts not visible in Secure EL1
1708 return Gicv3::INTID_SPURIOUS;
1709 }
1710
1711 return hppi.intid;
1712}
1713
1714void
1715Gicv3CPUInterface::dropPriority(Gicv3::GroupId group)
1716{
1717 int apr_misc_reg;
1718 RegVal apr;
1719 apr_misc_reg = group == Gicv3::G0S ?
1720 MISCREG_ICC_AP0R0_EL1 : MISCREG_ICC_AP1R0_EL1;
1721 apr = isa->readMiscRegNoEffect(apr_misc_reg);
1722
1723 if (apr) {
1724 apr &= apr - 1;
1725 isa->setMiscRegNoEffect(apr_misc_reg, apr);
1726 }
1727
1728 update();
1729}
1730
1731uint8_t
1732Gicv3CPUInterface::virtualDropPriority()
1733{
1734 int apr_max = 1 << (VIRTUAL_PREEMPTION_BITS - 5);
1735
1736 for (int i = 0; i < apr_max; i++) {
1737 RegVal vapr0 = isa->readMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i);
1738 RegVal vapr1 = isa->readMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i);
1739
1740 if (!vapr0 && !vapr1) {
1741 continue;
1742 }
1743
1744 int vapr0_count = ctz32(vapr0);
1745 int vapr1_count = ctz32(vapr1);
1746
1747 if (vapr0_count <= vapr1_count) {
1748 vapr0 &= vapr0 - 1;
1749 isa->setMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i, vapr0);
1750 return (vapr0_count + i * 32) << (GIC_MIN_VBPR + 1);
1751 } else {
1752 vapr1 &= vapr1 - 1;
1753 isa->setMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i, vapr1);
1754 return (vapr1_count + i * 32) << (GIC_MIN_VBPR + 1);
1755 }
1756 }
1757
1758 return 0xff;
1759}
1760
1761void
|
| 1762Gicv3CPUInterface::generateSGI(RegVal val, Gicv3::GroupId group)
1763{
1764 uint8_t aff3 = bits(val, 55, 48);
1765 uint8_t aff2 = bits(val, 39, 32);
1766 uint8_t aff1 = bits(val, 23, 16);;
1767 uint16_t target_list = bits(val, 15, 0);
1768 uint32_t int_id = bits(val, 27, 24);
1769 bool irm = bits(val, 40, 40);
1770 uint8_t rs = bits(val, 47, 44);
1771
1772 bool ns = !inSecureState();
1773
1774 for (int i = 0; i < gic->getSystem()->numContexts(); i++) {
1775 Gicv3Redistributor * redistributor_i =
1776 gic->getRedistributor(i);
1777 uint32_t affinity_i = redistributor_i->getAffinity();
1778
1779 if (irm) {
1780 // Interrupts routed to all PEs in the system,
1781 // excluding "self"
1782 if (affinity_i == redistributor->getAffinity()) {
1783 continue;
1784 }
1785 } else {
1786 // Interrupts routed to the PEs specified by
1787 // Aff3.Aff2.Aff1.<target list>
1788 if ((affinity_i >> 8) !=
1789 ((aff3 << 16) | (aff2 << 8) | (aff1 << 0))) {
1790 continue;
1791 }
1792
1793 uint8_t aff0_i = bits(affinity_i, 7, 0);
1794
1795 if (!(aff0_i >= rs * 16 && aff0_i < (rs + 1) * 16 &&
1796 ((0x1 << (aff0_i - rs * 16)) & target_list))) {
1797 continue;
1798 }
1799 }
1800
1801 redistributor_i->sendSGI(int_id, group, ns);
1802 }
1803}
1804
1805void
|
1793Gicv3CPUInterface::activateIRQ(uint32_t int_id, Gicv3::GroupId group)
1794{
1795 // Update active priority registers.
1796 uint32_t prio = hppi.prio & 0xf8;
1797 int apr_bit = prio >> (8 - PRIORITY_BITS);
1798 int reg_bit = apr_bit % 32;
1799 int apr_idx = group == Gicv3::G0S ?
1800 MISCREG_ICC_AP0R0_EL1 : MISCREG_ICC_AP1R0_EL1;
1801 RegVal apr = isa->readMiscRegNoEffect(apr_idx);
1802 apr |= (1 << reg_bit);
1803 isa->setMiscRegNoEffect(apr_idx, apr);
1804
1805 // Move interrupt state from pending to active.
1806 if (int_id < Gicv3::SGI_MAX + Gicv3::PPI_MAX) {
1807 // SGI or PPI, redistributor
1808 redistributor->activateIRQ(int_id);
1809 redistributor->updateAndInformCPUInterface();
1810 } else if (int_id < Gicv3::INTID_SECURE) {
1811 // SPI, distributor
1812 distributor->activateIRQ(int_id);
1813 distributor->updateAndInformCPUInterfaces();
1814 } else if (int_id >= Gicv3Redistributor::SMALLEST_LPI_ID) {
1815 // LPI, Redistributor
1816 redistributor->setClrLPI(int_id, false);
1817 }
1818}
1819
1820void
1821Gicv3CPUInterface::virtualActivateIRQ(uint32_t lr_idx)
1822{
1823 // Update active priority registers.
1824 ICH_LR_EL2 ich_lr_el = isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 +
1825 lr_idx);
1826 Gicv3::GroupId group = ich_lr_el.Group ? Gicv3::G1NS : Gicv3::G0S;
1827 uint8_t prio = ich_lr_el.Priority & 0xf8;
1828 int apr_bit = prio >> (8 - VIRTUAL_PREEMPTION_BITS);
1829 int reg_no = apr_bit / 32;
1830 int reg_bit = apr_bit % 32;
1831 int apr_idx = group == Gicv3::G0S ?
1832 MISCREG_ICH_AP0R0_EL2 + reg_no : MISCREG_ICH_AP1R0_EL2 + reg_no;
1833 RegVal apr = isa->readMiscRegNoEffect(apr_idx);
1834 apr |= (1 << reg_bit);
1835 isa->setMiscRegNoEffect(apr_idx, apr);
1836 // Move interrupt state from pending to active.
1837 ich_lr_el.State = ICH_LR_EL2_STATE_ACTIVE;
1838 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx, ich_lr_el);
1839}
1840
1841void
1842Gicv3CPUInterface::deactivateIRQ(uint32_t int_id, Gicv3::GroupId group)
1843{
1844 if (int_id < Gicv3::SGI_MAX + Gicv3::PPI_MAX) {
1845 // SGI or PPI, redistributor
1846 redistributor->deactivateIRQ(int_id);
1847 redistributor->updateAndInformCPUInterface();
1848 } else if (int_id < Gicv3::INTID_SECURE) {
1849 // SPI, distributor
1850 distributor->deactivateIRQ(int_id);
1851 distributor->updateAndInformCPUInterfaces();
1852 } else {
1853 // LPI, redistributor, shouldn't deactivate
1854 redistributor->updateAndInformCPUInterface();
1855 }
1856}
1857
1858void
1859Gicv3CPUInterface::virtualDeactivateIRQ(int lr_idx)
1860{
1861 ICH_LR_EL2 ich_lr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 +
1862 lr_idx);
1863
1864 if (ich_lr_el2.HW) {
1865 // Deactivate the associated physical interrupt
1866 if (ich_lr_el2.pINTID < Gicv3::INTID_SECURE) {
1867 Gicv3::GroupId group = ich_lr_el2.pINTID >= 32 ?
1868 distributor->getIntGroup(ich_lr_el2.pINTID) :
1869 redistributor->getIntGroup(ich_lr_el2.pINTID);
1870 deactivateIRQ(ich_lr_el2.pINTID, group);
1871 }
1872 }
1873
1874 // Remove the active bit
1875 ich_lr_el2.State = ich_lr_el2.State & ~ICH_LR_EL2_STATE_ACTIVE;
1876 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx, ich_lr_el2);
1877}
1878
1879/*
1880 * Returns the priority group field for the current BPR value for the group.
1881 * GroupBits() Pseudocode from spec.
1882 */
1883uint32_t
1884Gicv3CPUInterface::groupPriorityMask(Gicv3::GroupId group)
1885{
1886 ICC_CTLR_EL1 icc_ctlr_el1_s =
1887 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S);
1888 ICC_CTLR_EL1 icc_ctlr_el1_ns =
1889 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS);
1890
1891 if ((group == Gicv3::G1S && icc_ctlr_el1_s.CBPR) ||
1892 (group == Gicv3::G1NS && icc_ctlr_el1_ns.CBPR)) {
1893 group = Gicv3::G0S;
1894 }
1895
1896 int bpr;
1897
1898 if (group == Gicv3::G0S) {
1899 bpr = readMiscReg(MISCREG_ICC_BPR0_EL1) & 0x7;
1900 } else {
1901 bpr = readMiscReg(MISCREG_ICC_BPR1_EL1) & 0x7;
1902 }
1903
1904 if (group == Gicv3::G1NS) {
1905 assert(bpr > 0);
1906 bpr--;
1907 }
1908
1909 return ~0U << (bpr + 1);
1910}
1911
1912uint32_t
1913Gicv3CPUInterface::virtualGroupPriorityMask(Gicv3::GroupId group) const
1914{
1915 ICH_VMCR_EL2 ich_vmcr_el2 =
1916 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1917
1918 if ((group == Gicv3::G1NS) && ich_vmcr_el2.VCBPR) {
1919 group = Gicv3::G0S;
1920 }
1921
1922 int bpr;
1923
1924 if (group == Gicv3::G0S) {
1925 bpr = ich_vmcr_el2.VBPR0;
1926 } else {
1927 bpr = ich_vmcr_el2.VBPR1;
1928 }
1929
1930 if (group == Gicv3::G1NS) {
1931 assert(bpr > 0);
1932 bpr--;
1933 }
1934
1935 return ~0U << (bpr + 1);
1936}
1937
1938bool
1939Gicv3CPUInterface::isEOISplitMode() const
1940{
1941 if (isEL3OrMon()) {
1942 ICC_CTLR_EL3 icc_ctlr_el3 =
1943 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3);
1944 return icc_ctlr_el3.EOImode_EL3;
1945 } else {
1946 ICC_CTLR_EL1 icc_ctlr_el1 =
1947 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1);
1948 return icc_ctlr_el1.EOImode;
1949 }
1950}
1951
1952bool
1953Gicv3CPUInterface::virtualIsEOISplitMode() const
1954{
1955 ICH_VMCR_EL2 ich_vmcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1956 return ich_vmcr_el2.VEOIM;
1957}
1958
1959int
1960Gicv3CPUInterface::highestActiveGroup() const
1961{
1962 int g0_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP0R0_EL1));
1963 int gq_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_S));
1964 int g1nz_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_NS));
1965
1966 if (g1nz_ctz < g0_ctz && g1nz_ctz < gq_ctz) {
1967 return Gicv3::G1NS;
1968 }
1969
1970 if (gq_ctz < g0_ctz) {
1971 return Gicv3::G1S;
1972 }
1973
1974 if (g0_ctz < 32) {
1975 return Gicv3::G0S;
1976 }
1977
1978 return -1;
1979}
1980
1981void
1982Gicv3CPUInterface::update()
1983{
1984 bool signal_IRQ = false;
1985 bool signal_FIQ = false;
1986
1987 if (hppi.group == Gicv3::G1S && !haveEL(EL3)) {
1988 /*
1989 * Secure enabled GIC sending a G1S IRQ to a secure disabled
1990 * CPU -> send G0 IRQ
1991 */
1992 hppi.group = Gicv3::G0S;
1993 }
1994
1995 if (hppiCanPreempt()) {
1996 ArmISA::InterruptTypes int_type = intSignalType(hppi.group);
1997 DPRINTF(GIC, "Gicv3CPUInterface::update(): "
1998 "posting int as %d!\n", int_type);
1999 int_type == ArmISA::INT_IRQ ? signal_IRQ = true : signal_FIQ = true;
2000 }
2001
2002 if (signal_IRQ) {
2003 gic->postInt(cpuId, ArmISA::INT_IRQ);
2004 } else {
2005 gic->deassertInt(cpuId, ArmISA::INT_IRQ);
2006 }
2007
2008 if (signal_FIQ) {
2009 gic->postInt(cpuId, ArmISA::INT_FIQ);
2010 } else {
2011 gic->deassertInt(cpuId, ArmISA::INT_FIQ);
2012 }
2013}
2014
2015void
2016Gicv3CPUInterface::virtualUpdate()
2017{
2018 bool signal_IRQ = false;
2019 bool signal_FIQ = false;
2020 int lr_idx = getHPPVILR();
2021
2022 if (lr_idx >= 0) {
2023 ICH_LR_EL2 ich_lr_el2 =
2024 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
2025
2026 if (hppviCanPreempt(lr_idx)) {
2027 if (ich_lr_el2.Group) {
2028 signal_IRQ = true;
2029 } else {
2030 signal_FIQ = true;
2031 }
2032 }
2033 }
2034
2035 ICH_HCR_EL2 ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
2036
2037 if (ich_hcr_el2.En) {
2038 if (maintenanceInterruptStatus()) {
2039 maintenanceInterrupt->raise();
2040 }
2041 }
2042
2043 if (signal_IRQ) {
2044 DPRINTF(GIC, "Gicv3CPUInterface::virtualUpdate(): "
2045 "posting int as %d!\n", ArmISA::INT_VIRT_IRQ);
2046 gic->postInt(cpuId, ArmISA::INT_VIRT_IRQ);
2047 } else {
2048 gic->deassertInt(cpuId, ArmISA::INT_VIRT_IRQ);
2049 }
2050
2051 if (signal_FIQ) {
2052 DPRINTF(GIC, "Gicv3CPUInterface::virtualUpdate(): "
2053 "posting int as %d!\n", ArmISA::INT_VIRT_FIQ);
2054 gic->postInt(cpuId, ArmISA::INT_VIRT_FIQ);
2055 } else {
2056 gic->deassertInt(cpuId, ArmISA::INT_VIRT_FIQ);
2057 }
2058}
2059
2060// Returns the index of the LR with the HPPI
2061int
2062Gicv3CPUInterface::getHPPVILR() const
2063{
2064 int idx = -1;
2065 ICH_VMCR_EL2 ich_vmcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
2066
2067 if (!ich_vmcr_el2.VENG0 && !ich_vmcr_el2.VENG1) {
2068 // VG0 and VG1 disabled...
2069 return idx;
2070 }
2071
2072 uint8_t highest_prio = 0xff;
2073
2074 for (int i = 0; i < 16; i++) {
2075 ICH_LR_EL2 ich_lr_el2 =
2076 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + i);
2077
2078 if (ich_lr_el2.State != Gicv3::INT_PENDING) {
2079 continue;
2080 }
2081
2082 if (ich_lr_el2.Group) {
2083 // VG1
2084 if (!ich_vmcr_el2.VENG1) {
2085 continue;
2086 }
2087 } else {
2088 // VG0
2089 if (!ich_vmcr_el2.VENG0) {
2090 continue;
2091 }
2092 }
2093
2094 uint8_t prio = ich_lr_el2.Priority;
2095
2096 if (prio < highest_prio) {
2097 highest_prio = prio;
2098 idx = i;
2099 }
2100 }
2101
2102 return idx;
2103}
2104
2105bool
2106Gicv3CPUInterface::hppviCanPreempt(int lr_idx) const
2107{
2108 ICH_HCR_EL2 ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
2109 if (!ich_hcr_el2.En) {
2110 // virtual interface is disabled
2111 return false;
2112 }
2113
2114 ICH_LR_EL2 ich_lr_el2 =
2115 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
2116 uint8_t prio = ich_lr_el2.Priority;
2117 uint8_t vpmr =
2118 bits(isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2), 31, 24);
2119
2120 if (prio >= vpmr) {
2121 // prioriry masked
2122 return false;
2123 }
2124
2125 uint8_t rprio = virtualHighestActivePriority();
2126
2127 if (rprio == 0xff) {
2128 return true;
2129 }
2130
2131 Gicv3::GroupId group = ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S;
2132 uint32_t prio_mask = virtualGroupPriorityMask(group);
2133
2134 if ((prio & prio_mask) < (rprio & prio_mask)) {
2135 return true;
2136 }
2137
2138 return false;
2139}
2140
2141uint8_t
2142Gicv3CPUInterface::virtualHighestActivePriority() const
2143{
2144 uint8_t num_aprs = 1 << (VIRTUAL_PRIORITY_BITS - 5);
2145
2146 for (int i = 0; i < num_aprs; i++) {
2147 RegVal vapr =
2148 isa->readMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i) |
2149 isa->readMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i);
2150
2151 if (!vapr) {
2152 continue;
2153 }
2154
2155 return (i * 32 + ctz32(vapr)) << (GIC_MIN_VBPR + 1);
2156 }
2157
2158 // no active interrups, return idle priority
2159 return 0xff;
2160}
2161
2162void
2163Gicv3CPUInterface::virtualIncrementEOICount()
2164{
2165 // Increment the EOICOUNT field in ICH_HCR_EL2
2166 RegVal ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
2167 uint32_t EOI_cout = bits(ich_hcr_el2, 31, 27);
2168 EOI_cout++;
2169 ich_hcr_el2 = insertBits(ich_hcr_el2, 31, 27, EOI_cout);
2170 isa->setMiscRegNoEffect(MISCREG_ICH_HCR_EL2, ich_hcr_el2);
2171}
2172
2173// spec section 4.6.2
2174ArmISA::InterruptTypes
2175Gicv3CPUInterface::intSignalType(Gicv3::GroupId group) const
2176{
2177 bool is_fiq = false;
2178
2179 switch (group) {
2180 case Gicv3::G0S:
2181 is_fiq = true;
2182 break;
2183
2184 case Gicv3::G1S:
2185 is_fiq = (distributor->DS == 0) &&
2186 (!inSecureState() || ((currEL() == EL3) && isAA64()));
2187 break;
2188
2189 case Gicv3::G1NS:
2190 is_fiq = (distributor->DS == 0) && inSecureState();
2191 break;
2192
2193 default:
2194 panic("Gicv3CPUInterface::intSignalType(): invalid group!");
2195 }
2196
2197 if (is_fiq) {
2198 return ArmISA::INT_FIQ;
2199 } else {
2200 return ArmISA::INT_IRQ;
2201 }
2202}
2203
2204bool
2205Gicv3CPUInterface::hppiCanPreempt()
2206{
2207 if (hppi.prio == 0xff) {
2208 // there is no pending interrupt
2209 return false;
2210 }
2211
2212 if (!groupEnabled(hppi.group)) {
2213 // group disabled at CPU interface
2214 return false;
2215 }
2216
2217 if (hppi.prio >= isa->readMiscRegNoEffect(MISCREG_ICC_PMR_EL1)) {
2218 // priority masked
2219 return false;
2220 }
2221
2222 uint8_t rprio = highestActivePriority();
2223
2224 if (rprio == 0xff) {
2225 return true;
2226 }
2227
2228 uint32_t prio_mask = groupPriorityMask(hppi.group);
2229
2230 if ((hppi.prio & prio_mask) < (rprio & prio_mask)) {
2231 return true;
2232 }
2233
2234 return false;
2235}
2236
2237uint8_t
2238Gicv3CPUInterface::highestActivePriority() const
2239{
2240 uint32_t apr = isa->readMiscRegNoEffect(MISCREG_ICC_AP0R0_EL1) |
2241 isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_NS) |
2242 isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_S);
2243
2244 if (apr) {
2245 return ctz32(apr) << (GIC_MIN_BPR + 1);
2246 }
2247
2248 // no active interrups, return idle priority
2249 return 0xff;
2250}
2251
2252bool
2253Gicv3CPUInterface::groupEnabled(Gicv3::GroupId group) const
2254{
2255 switch (group) {
2256 case Gicv3::G0S: {
2257 ICC_IGRPEN0_EL1 icc_igrpen0_el1 =
2258 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN0_EL1);
2259 return icc_igrpen0_el1.Enable;
2260 }
2261
2262 case Gicv3::G1S: {
2263 ICC_IGRPEN1_EL1 icc_igrpen1_el1_s =
2264 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1_S);
2265 return icc_igrpen1_el1_s.Enable;
2266 }
2267
2268 case Gicv3::G1NS: {
2269 ICC_IGRPEN1_EL1 icc_igrpen1_el1_ns =
2270 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1_NS);
2271 return icc_igrpen1_el1_ns.Enable;
2272 }
2273
2274 default:
2275 panic("Gicv3CPUInterface::groupEnable(): invalid group!\n");
2276 }
2277}
2278
2279bool
2280Gicv3CPUInterface::inSecureState() const
2281{
2282 if (!gic->getSystem()->haveSecurity()) {
2283 return false;
2284 }
2285
2286 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR);
2287 SCR scr = isa->readMiscRegNoEffect(MISCREG_SCR);
2288 return ArmISA::inSecureState(scr, cpsr);
2289}
2290
2291int
2292Gicv3CPUInterface::currEL() const
2293{
2294 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR);
2295 bool is_64 = opModeIs64((OperatingMode)(uint8_t) cpsr.mode);
2296
2297 if (is_64) {
2298 return (ExceptionLevel)(uint8_t) cpsr.el;
2299 } else {
2300 switch (cpsr.mode) {
2301 case MODE_USER:
2302 return 0;
2303
2304 case MODE_HYP:
2305 return 2;
2306
2307 case MODE_MON:
2308 return 3;
2309
2310 default:
2311 return 1;
2312 }
2313 }
2314}
2315
2316bool
2317Gicv3CPUInterface::haveEL(ExceptionLevel el) const
2318{
2319 switch (el) {
2320 case EL0:
2321 case EL1:
2322 return true;
2323
2324 case EL2:
2325 return gic->getSystem()->haveVirtualization();
2326
2327 case EL3:
2328 return gic->getSystem()->haveSecurity();
2329
2330 default:
2331 warn("Unimplemented Exception Level\n");
2332 return false;
2333 }
2334}
2335
2336bool
2337Gicv3CPUInterface::isSecureBelowEL3() const
2338{
2339 SCR scr = isa->readMiscRegNoEffect(MISCREG_SCR_EL3);
2340 return haveEL(EL3) && scr.ns == 0;
2341}
2342
2343bool
2344Gicv3CPUInterface::isAA64() const
2345{
2346 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR);
2347 return opModeIs64((OperatingMode)(uint8_t) cpsr.mode);
2348}
2349
2350bool
2351Gicv3CPUInterface::isEL3OrMon() const
2352{
2353 if (haveEL(EL3)) {
2354 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR);
2355 bool is_64 = opModeIs64((OperatingMode)(uint8_t) cpsr.mode);
2356
2357 if (is_64 && (cpsr.el == EL3)) {
2358 return true;
2359 } else if (!is_64 && (cpsr.mode == MODE_MON)) {
2360 return true;
2361 }
2362 }
2363
2364 return false;
2365}
2366
2367// Computes ICH_EISR_EL2
2368uint64_t
2369Gicv3CPUInterface::eoiMaintenanceInterruptStatus() const
2370{
2371 // ICH_EISR_EL2
2372 // Bits [63:16] - RES0
2373 // Status<n>, bit [n], for n = 0 to 15
2374 // EOI maintenance interrupt status bit for List register <n>:
2375 // 0 if List register <n>, ICH_LR<n>_EL2, does not have an EOI
2376 // maintenance interrupt.
2377 // 1 if List register <n>, ICH_LR<n>_EL2, has an EOI maintenance
2378 // interrupt that has not been handled.
2379 //
2380 // For any ICH_LR<n>_EL2, the corresponding status bit is set to 1 if all
2381 // of the following are true:
2382 // - ICH_LR<n>_EL2.State is 0b00 (ICH_LR_EL2_STATE_INVALID).
2383 // - ICH_LR<n>_EL2.HW is 0.
2384 // - ICH_LR<n>_EL2.EOI (bit [41]) is 1.
2385
2386 uint64_t value = 0;
2387
2388 for (int lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) {
2389 ICH_LR_EL2 ich_lr_el2 =
2390 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
2391
2392 if ((ich_lr_el2.State == ICH_LR_EL2_STATE_INVALID) &&
2393 !ich_lr_el2.HW && ich_lr_el2.EOI) {
2394 value |= (1 << lr_idx);
2395 }
2396 }
2397
2398 return value;
2399}
2400
2401Gicv3CPUInterface::ICH_MISR_EL2
2402Gicv3CPUInterface::maintenanceInterruptStatus() const
2403{
2404 // Comments are copied from SPEC section 9.4.7 (ID012119)
2405 ICH_MISR_EL2 ich_misr_el2 = 0;
2406 ICH_HCR_EL2 ich_hcr_el2 =
2407 isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
2408 ICH_VMCR_EL2 ich_vmcr_el2 =
2409 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
2410
2411 // End Of Interrupt. [bit 0]
2412 // This maintenance interrupt is asserted when at least one bit in
2413 // ICH_EISR_EL2 is 1.
2414
2415 if (eoiMaintenanceInterruptStatus()) {
2416 ich_misr_el2.EOI = 1;
2417 }
2418
2419 // Underflow. [bit 1]
2420 // This maintenance interrupt is asserted when ICH_HCR_EL2.UIE==1 and
2421 // zero or one of the List register entries are marked as a valid
2422 // interrupt, that is, if the corresponding ICH_LR<n>_EL2.State bits
2423 // do not equal 0x0.
2424 uint32_t num_valid_interrupts = 0;
2425 uint32_t num_pending_interrupts = 0;
2426
2427 for (int lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) {
2428 ICH_LR_EL2 ich_lr_el2 =
2429 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
2430
2431 if (ich_lr_el2.State != ICH_LR_EL2_STATE_INVALID) {
2432 num_valid_interrupts++;
2433 }
2434
2435 if (ich_lr_el2.State == ICH_LR_EL2_STATE_PENDING) {
2436 num_pending_interrupts++;
2437 }
2438 }
2439
2440 if (ich_hcr_el2.UIE && (num_valid_interrupts < 2)) {
2441 ich_misr_el2.U = 1;
2442 }
2443
2444 // List Register Entry Not Present. [bit 2]
2445 // This maintenance interrupt is asserted when ICH_HCR_EL2.LRENPIE==1
2446 // and ICH_HCR_EL2.EOIcount is non-zero.
2447 if (ich_hcr_el2.LRENPIE && ich_hcr_el2.EOIcount) {
2448 ich_misr_el2.LRENP = 1;
2449 }
2450
2451 // No Pending. [bit 3]
2452 // This maintenance interrupt is asserted when ICH_HCR_EL2.NPIE==1 and
2453 // no List register is in pending state.
2454 if (ich_hcr_el2.NPIE && (num_pending_interrupts == 0)) {
2455 ich_misr_el2.NP = 1;
2456 }
2457
2458 // vPE Group 0 Enabled. [bit 4]
2459 // This maintenance interrupt is asserted when
2460 // ICH_HCR_EL2.VGrp0EIE==1 and ICH_VMCR_EL2.VENG0==1.
2461 if (ich_hcr_el2.VGrp0EIE && ich_vmcr_el2.VENG0) {
2462 ich_misr_el2.VGrp0E = 1;
2463 }
2464
2465 // vPE Group 0 Disabled. [bit 5]
2466 // This maintenance interrupt is asserted when
2467 // ICH_HCR_EL2.VGrp0DIE==1 and ICH_VMCR_EL2.VENG0==0.
2468 if (ich_hcr_el2.VGrp0DIE && !ich_vmcr_el2.VENG0) {
2469 ich_misr_el2.VGrp0D = 1;
2470 }
2471
2472 // vPE Group 1 Enabled. [bit 6]
2473 // This maintenance interrupt is asserted when
2474 // ICH_HCR_EL2.VGrp1EIE==1 and ICH_VMCR_EL2.VENG1==is 1.
2475 if (ich_hcr_el2.VGrp1EIE && ich_vmcr_el2.VENG1) {
2476 ich_misr_el2.VGrp1E = 1;
2477 }
2478
2479 // vPE Group 1 Disabled. [bit 7]
2480 // This maintenance interrupt is asserted when
2481 // ICH_HCR_EL2.VGrp1DIE==1 and ICH_VMCR_EL2.VENG1==is 0.
2482 if (ich_hcr_el2.VGrp1DIE && !ich_vmcr_el2.VENG1) {
2483 ich_misr_el2.VGrp1D = 1;
2484 }
2485
2486 return ich_misr_el2;
2487}
2488
2489void
2490Gicv3CPUInterface::serialize(CheckpointOut & cp) const
2491{
2492 SERIALIZE_SCALAR(hppi.intid);
2493 SERIALIZE_SCALAR(hppi.prio);
2494 SERIALIZE_ENUM(hppi.group);
2495}
2496
2497void
2498Gicv3CPUInterface::unserialize(CheckpointIn & cp)
2499{
2500 UNSERIALIZE_SCALAR(hppi.intid);
2501 UNSERIALIZE_SCALAR(hppi.prio);
2502 UNSERIALIZE_ENUM(hppi.group);
2503}
| 1806Gicv3CPUInterface::activateIRQ(uint32_t int_id, Gicv3::GroupId group)
1807{
1808 // Update active priority registers.
1809 uint32_t prio = hppi.prio & 0xf8;
1810 int apr_bit = prio >> (8 - PRIORITY_BITS);
1811 int reg_bit = apr_bit % 32;
1812 int apr_idx = group == Gicv3::G0S ?
1813 MISCREG_ICC_AP0R0_EL1 : MISCREG_ICC_AP1R0_EL1;
1814 RegVal apr = isa->readMiscRegNoEffect(apr_idx);
1815 apr |= (1 << reg_bit);
1816 isa->setMiscRegNoEffect(apr_idx, apr);
1817
1818 // Move interrupt state from pending to active.
1819 if (int_id < Gicv3::SGI_MAX + Gicv3::PPI_MAX) {
1820 // SGI or PPI, redistributor
1821 redistributor->activateIRQ(int_id);
1822 redistributor->updateAndInformCPUInterface();
1823 } else if (int_id < Gicv3::INTID_SECURE) {
1824 // SPI, distributor
1825 distributor->activateIRQ(int_id);
1826 distributor->updateAndInformCPUInterfaces();
1827 } else if (int_id >= Gicv3Redistributor::SMALLEST_LPI_ID) {
1828 // LPI, Redistributor
1829 redistributor->setClrLPI(int_id, false);
1830 }
1831}
1832
1833void
1834Gicv3CPUInterface::virtualActivateIRQ(uint32_t lr_idx)
1835{
1836 // Update active priority registers.
1837 ICH_LR_EL2 ich_lr_el = isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 +
1838 lr_idx);
1839 Gicv3::GroupId group = ich_lr_el.Group ? Gicv3::G1NS : Gicv3::G0S;
1840 uint8_t prio = ich_lr_el.Priority & 0xf8;
1841 int apr_bit = prio >> (8 - VIRTUAL_PREEMPTION_BITS);
1842 int reg_no = apr_bit / 32;
1843 int reg_bit = apr_bit % 32;
1844 int apr_idx = group == Gicv3::G0S ?
1845 MISCREG_ICH_AP0R0_EL2 + reg_no : MISCREG_ICH_AP1R0_EL2 + reg_no;
1846 RegVal apr = isa->readMiscRegNoEffect(apr_idx);
1847 apr |= (1 << reg_bit);
1848 isa->setMiscRegNoEffect(apr_idx, apr);
1849 // Move interrupt state from pending to active.
1850 ich_lr_el.State = ICH_LR_EL2_STATE_ACTIVE;
1851 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx, ich_lr_el);
1852}
1853
1854void
1855Gicv3CPUInterface::deactivateIRQ(uint32_t int_id, Gicv3::GroupId group)
1856{
1857 if (int_id < Gicv3::SGI_MAX + Gicv3::PPI_MAX) {
1858 // SGI or PPI, redistributor
1859 redistributor->deactivateIRQ(int_id);
1860 redistributor->updateAndInformCPUInterface();
1861 } else if (int_id < Gicv3::INTID_SECURE) {
1862 // SPI, distributor
1863 distributor->deactivateIRQ(int_id);
1864 distributor->updateAndInformCPUInterfaces();
1865 } else {
1866 // LPI, redistributor, shouldn't deactivate
1867 redistributor->updateAndInformCPUInterface();
1868 }
1869}
1870
1871void
1872Gicv3CPUInterface::virtualDeactivateIRQ(int lr_idx)
1873{
1874 ICH_LR_EL2 ich_lr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 +
1875 lr_idx);
1876
1877 if (ich_lr_el2.HW) {
1878 // Deactivate the associated physical interrupt
1879 if (ich_lr_el2.pINTID < Gicv3::INTID_SECURE) {
1880 Gicv3::GroupId group = ich_lr_el2.pINTID >= 32 ?
1881 distributor->getIntGroup(ich_lr_el2.pINTID) :
1882 redistributor->getIntGroup(ich_lr_el2.pINTID);
1883 deactivateIRQ(ich_lr_el2.pINTID, group);
1884 }
1885 }
1886
1887 // Remove the active bit
1888 ich_lr_el2.State = ich_lr_el2.State & ~ICH_LR_EL2_STATE_ACTIVE;
1889 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx, ich_lr_el2);
1890}
1891
1892/*
1893 * Returns the priority group field for the current BPR value for the group.
1894 * GroupBits() Pseudocode from spec.
1895 */
1896uint32_t
1897Gicv3CPUInterface::groupPriorityMask(Gicv3::GroupId group)
1898{
1899 ICC_CTLR_EL1 icc_ctlr_el1_s =
1900 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S);
1901 ICC_CTLR_EL1 icc_ctlr_el1_ns =
1902 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS);
1903
1904 if ((group == Gicv3::G1S && icc_ctlr_el1_s.CBPR) ||
1905 (group == Gicv3::G1NS && icc_ctlr_el1_ns.CBPR)) {
1906 group = Gicv3::G0S;
1907 }
1908
1909 int bpr;
1910
1911 if (group == Gicv3::G0S) {
1912 bpr = readMiscReg(MISCREG_ICC_BPR0_EL1) & 0x7;
1913 } else {
1914 bpr = readMiscReg(MISCREG_ICC_BPR1_EL1) & 0x7;
1915 }
1916
1917 if (group == Gicv3::G1NS) {
1918 assert(bpr > 0);
1919 bpr--;
1920 }
1921
1922 return ~0U << (bpr + 1);
1923}
1924
1925uint32_t
1926Gicv3CPUInterface::virtualGroupPriorityMask(Gicv3::GroupId group) const
1927{
1928 ICH_VMCR_EL2 ich_vmcr_el2 =
1929 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1930
1931 if ((group == Gicv3::G1NS) && ich_vmcr_el2.VCBPR) {
1932 group = Gicv3::G0S;
1933 }
1934
1935 int bpr;
1936
1937 if (group == Gicv3::G0S) {
1938 bpr = ich_vmcr_el2.VBPR0;
1939 } else {
1940 bpr = ich_vmcr_el2.VBPR1;
1941 }
1942
1943 if (group == Gicv3::G1NS) {
1944 assert(bpr > 0);
1945 bpr--;
1946 }
1947
1948 return ~0U << (bpr + 1);
1949}
1950
1951bool
1952Gicv3CPUInterface::isEOISplitMode() const
1953{
1954 if (isEL3OrMon()) {
1955 ICC_CTLR_EL3 icc_ctlr_el3 =
1956 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3);
1957 return icc_ctlr_el3.EOImode_EL3;
1958 } else {
1959 ICC_CTLR_EL1 icc_ctlr_el1 =
1960 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1);
1961 return icc_ctlr_el1.EOImode;
1962 }
1963}
1964
1965bool
1966Gicv3CPUInterface::virtualIsEOISplitMode() const
1967{
1968 ICH_VMCR_EL2 ich_vmcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1969 return ich_vmcr_el2.VEOIM;
1970}
1971
1972int
1973Gicv3CPUInterface::highestActiveGroup() const
1974{
1975 int g0_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP0R0_EL1));
1976 int gq_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_S));
1977 int g1nz_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_NS));
1978
1979 if (g1nz_ctz < g0_ctz && g1nz_ctz < gq_ctz) {
1980 return Gicv3::G1NS;
1981 }
1982
1983 if (gq_ctz < g0_ctz) {
1984 return Gicv3::G1S;
1985 }
1986
1987 if (g0_ctz < 32) {
1988 return Gicv3::G0S;
1989 }
1990
1991 return -1;
1992}
1993
1994void
1995Gicv3CPUInterface::update()
1996{
1997 bool signal_IRQ = false;
1998 bool signal_FIQ = false;
1999
2000 if (hppi.group == Gicv3::G1S && !haveEL(EL3)) {
2001 /*
2002 * Secure enabled GIC sending a G1S IRQ to a secure disabled
2003 * CPU -> send G0 IRQ
2004 */
2005 hppi.group = Gicv3::G0S;
2006 }
2007
2008 if (hppiCanPreempt()) {
2009 ArmISA::InterruptTypes int_type = intSignalType(hppi.group);
2010 DPRINTF(GIC, "Gicv3CPUInterface::update(): "
2011 "posting int as %d!\n", int_type);
2012 int_type == ArmISA::INT_IRQ ? signal_IRQ = true : signal_FIQ = true;
2013 }
2014
2015 if (signal_IRQ) {
2016 gic->postInt(cpuId, ArmISA::INT_IRQ);
2017 } else {
2018 gic->deassertInt(cpuId, ArmISA::INT_IRQ);
2019 }
2020
2021 if (signal_FIQ) {
2022 gic->postInt(cpuId, ArmISA::INT_FIQ);
2023 } else {
2024 gic->deassertInt(cpuId, ArmISA::INT_FIQ);
2025 }
2026}
2027
2028void
2029Gicv3CPUInterface::virtualUpdate()
2030{
2031 bool signal_IRQ = false;
2032 bool signal_FIQ = false;
2033 int lr_idx = getHPPVILR();
2034
2035 if (lr_idx >= 0) {
2036 ICH_LR_EL2 ich_lr_el2 =
2037 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
2038
2039 if (hppviCanPreempt(lr_idx)) {
2040 if (ich_lr_el2.Group) {
2041 signal_IRQ = true;
2042 } else {
2043 signal_FIQ = true;
2044 }
2045 }
2046 }
2047
2048 ICH_HCR_EL2 ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
2049
2050 if (ich_hcr_el2.En) {
2051 if (maintenanceInterruptStatus()) {
2052 maintenanceInterrupt->raise();
2053 }
2054 }
2055
2056 if (signal_IRQ) {
2057 DPRINTF(GIC, "Gicv3CPUInterface::virtualUpdate(): "
2058 "posting int as %d!\n", ArmISA::INT_VIRT_IRQ);
2059 gic->postInt(cpuId, ArmISA::INT_VIRT_IRQ);
2060 } else {
2061 gic->deassertInt(cpuId, ArmISA::INT_VIRT_IRQ);
2062 }
2063
2064 if (signal_FIQ) {
2065 DPRINTF(GIC, "Gicv3CPUInterface::virtualUpdate(): "
2066 "posting int as %d!\n", ArmISA::INT_VIRT_FIQ);
2067 gic->postInt(cpuId, ArmISA::INT_VIRT_FIQ);
2068 } else {
2069 gic->deassertInt(cpuId, ArmISA::INT_VIRT_FIQ);
2070 }
2071}
2072
2073// Returns the index of the LR with the HPPI
2074int
2075Gicv3CPUInterface::getHPPVILR() const
2076{
2077 int idx = -1;
2078 ICH_VMCR_EL2 ich_vmcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
2079
2080 if (!ich_vmcr_el2.VENG0 && !ich_vmcr_el2.VENG1) {
2081 // VG0 and VG1 disabled...
2082 return idx;
2083 }
2084
2085 uint8_t highest_prio = 0xff;
2086
2087 for (int i = 0; i < 16; i++) {
2088 ICH_LR_EL2 ich_lr_el2 =
2089 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + i);
2090
2091 if (ich_lr_el2.State != Gicv3::INT_PENDING) {
2092 continue;
2093 }
2094
2095 if (ich_lr_el2.Group) {
2096 // VG1
2097 if (!ich_vmcr_el2.VENG1) {
2098 continue;
2099 }
2100 } else {
2101 // VG0
2102 if (!ich_vmcr_el2.VENG0) {
2103 continue;
2104 }
2105 }
2106
2107 uint8_t prio = ich_lr_el2.Priority;
2108
2109 if (prio < highest_prio) {
2110 highest_prio = prio;
2111 idx = i;
2112 }
2113 }
2114
2115 return idx;
2116}
2117
2118bool
2119Gicv3CPUInterface::hppviCanPreempt(int lr_idx) const
2120{
2121 ICH_HCR_EL2 ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
2122 if (!ich_hcr_el2.En) {
2123 // virtual interface is disabled
2124 return false;
2125 }
2126
2127 ICH_LR_EL2 ich_lr_el2 =
2128 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
2129 uint8_t prio = ich_lr_el2.Priority;
2130 uint8_t vpmr =
2131 bits(isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2), 31, 24);
2132
2133 if (prio >= vpmr) {
2134 // prioriry masked
2135 return false;
2136 }
2137
2138 uint8_t rprio = virtualHighestActivePriority();
2139
2140 if (rprio == 0xff) {
2141 return true;
2142 }
2143
2144 Gicv3::GroupId group = ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S;
2145 uint32_t prio_mask = virtualGroupPriorityMask(group);
2146
2147 if ((prio & prio_mask) < (rprio & prio_mask)) {
2148 return true;
2149 }
2150
2151 return false;
2152}
2153
2154uint8_t
2155Gicv3CPUInterface::virtualHighestActivePriority() const
2156{
2157 uint8_t num_aprs = 1 << (VIRTUAL_PRIORITY_BITS - 5);
2158
2159 for (int i = 0; i < num_aprs; i++) {
2160 RegVal vapr =
2161 isa->readMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i) |
2162 isa->readMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i);
2163
2164 if (!vapr) {
2165 continue;
2166 }
2167
2168 return (i * 32 + ctz32(vapr)) << (GIC_MIN_VBPR + 1);
2169 }
2170
2171 // no active interrups, return idle priority
2172 return 0xff;
2173}
2174
2175void
2176Gicv3CPUInterface::virtualIncrementEOICount()
2177{
2178 // Increment the EOICOUNT field in ICH_HCR_EL2
2179 RegVal ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
2180 uint32_t EOI_cout = bits(ich_hcr_el2, 31, 27);
2181 EOI_cout++;
2182 ich_hcr_el2 = insertBits(ich_hcr_el2, 31, 27, EOI_cout);
2183 isa->setMiscRegNoEffect(MISCREG_ICH_HCR_EL2, ich_hcr_el2);
2184}
2185
2186// spec section 4.6.2
2187ArmISA::InterruptTypes
2188Gicv3CPUInterface::intSignalType(Gicv3::GroupId group) const
2189{
2190 bool is_fiq = false;
2191
2192 switch (group) {
2193 case Gicv3::G0S:
2194 is_fiq = true;
2195 break;
2196
2197 case Gicv3::G1S:
2198 is_fiq = (distributor->DS == 0) &&
2199 (!inSecureState() || ((currEL() == EL3) && isAA64()));
2200 break;
2201
2202 case Gicv3::G1NS:
2203 is_fiq = (distributor->DS == 0) && inSecureState();
2204 break;
2205
2206 default:
2207 panic("Gicv3CPUInterface::intSignalType(): invalid group!");
2208 }
2209
2210 if (is_fiq) {
2211 return ArmISA::INT_FIQ;
2212 } else {
2213 return ArmISA::INT_IRQ;
2214 }
2215}
2216
2217bool
2218Gicv3CPUInterface::hppiCanPreempt()
2219{
2220 if (hppi.prio == 0xff) {
2221 // there is no pending interrupt
2222 return false;
2223 }
2224
2225 if (!groupEnabled(hppi.group)) {
2226 // group disabled at CPU interface
2227 return false;
2228 }
2229
2230 if (hppi.prio >= isa->readMiscRegNoEffect(MISCREG_ICC_PMR_EL1)) {
2231 // priority masked
2232 return false;
2233 }
2234
2235 uint8_t rprio = highestActivePriority();
2236
2237 if (rprio == 0xff) {
2238 return true;
2239 }
2240
2241 uint32_t prio_mask = groupPriorityMask(hppi.group);
2242
2243 if ((hppi.prio & prio_mask) < (rprio & prio_mask)) {
2244 return true;
2245 }
2246
2247 return false;
2248}
2249
2250uint8_t
2251Gicv3CPUInterface::highestActivePriority() const
2252{
2253 uint32_t apr = isa->readMiscRegNoEffect(MISCREG_ICC_AP0R0_EL1) |
2254 isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_NS) |
2255 isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_S);
2256
2257 if (apr) {
2258 return ctz32(apr) << (GIC_MIN_BPR + 1);
2259 }
2260
2261 // no active interrups, return idle priority
2262 return 0xff;
2263}
2264
2265bool
2266Gicv3CPUInterface::groupEnabled(Gicv3::GroupId group) const
2267{
2268 switch (group) {
2269 case Gicv3::G0S: {
2270 ICC_IGRPEN0_EL1 icc_igrpen0_el1 =
2271 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN0_EL1);
2272 return icc_igrpen0_el1.Enable;
2273 }
2274
2275 case Gicv3::G1S: {
2276 ICC_IGRPEN1_EL1 icc_igrpen1_el1_s =
2277 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1_S);
2278 return icc_igrpen1_el1_s.Enable;
2279 }
2280
2281 case Gicv3::G1NS: {
2282 ICC_IGRPEN1_EL1 icc_igrpen1_el1_ns =
2283 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1_NS);
2284 return icc_igrpen1_el1_ns.Enable;
2285 }
2286
2287 default:
2288 panic("Gicv3CPUInterface::groupEnable(): invalid group!\n");
2289 }
2290}
2291
2292bool
2293Gicv3CPUInterface::inSecureState() const
2294{
2295 if (!gic->getSystem()->haveSecurity()) {
2296 return false;
2297 }
2298
2299 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR);
2300 SCR scr = isa->readMiscRegNoEffect(MISCREG_SCR);
2301 return ArmISA::inSecureState(scr, cpsr);
2302}
2303
2304int
2305Gicv3CPUInterface::currEL() const
2306{
2307 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR);
2308 bool is_64 = opModeIs64((OperatingMode)(uint8_t) cpsr.mode);
2309
2310 if (is_64) {
2311 return (ExceptionLevel)(uint8_t) cpsr.el;
2312 } else {
2313 switch (cpsr.mode) {
2314 case MODE_USER:
2315 return 0;
2316
2317 case MODE_HYP:
2318 return 2;
2319
2320 case MODE_MON:
2321 return 3;
2322
2323 default:
2324 return 1;
2325 }
2326 }
2327}
2328
2329bool
2330Gicv3CPUInterface::haveEL(ExceptionLevel el) const
2331{
2332 switch (el) {
2333 case EL0:
2334 case EL1:
2335 return true;
2336
2337 case EL2:
2338 return gic->getSystem()->haveVirtualization();
2339
2340 case EL3:
2341 return gic->getSystem()->haveSecurity();
2342
2343 default:
2344 warn("Unimplemented Exception Level\n");
2345 return false;
2346 }
2347}
2348
2349bool
2350Gicv3CPUInterface::isSecureBelowEL3() const
2351{
2352 SCR scr = isa->readMiscRegNoEffect(MISCREG_SCR_EL3);
2353 return haveEL(EL3) && scr.ns == 0;
2354}
2355
2356bool
2357Gicv3CPUInterface::isAA64() const
2358{
2359 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR);
2360 return opModeIs64((OperatingMode)(uint8_t) cpsr.mode);
2361}
2362
2363bool
2364Gicv3CPUInterface::isEL3OrMon() const
2365{
2366 if (haveEL(EL3)) {
2367 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR);
2368 bool is_64 = opModeIs64((OperatingMode)(uint8_t) cpsr.mode);
2369
2370 if (is_64 && (cpsr.el == EL3)) {
2371 return true;
2372 } else if (!is_64 && (cpsr.mode == MODE_MON)) {
2373 return true;
2374 }
2375 }
2376
2377 return false;
2378}
2379
2380// Computes ICH_EISR_EL2
2381uint64_t
2382Gicv3CPUInterface::eoiMaintenanceInterruptStatus() const
2383{
2384 // ICH_EISR_EL2
2385 // Bits [63:16] - RES0
2386 // Status<n>, bit [n], for n = 0 to 15
2387 // EOI maintenance interrupt status bit for List register <n>:
2388 // 0 if List register <n>, ICH_LR<n>_EL2, does not have an EOI
2389 // maintenance interrupt.
2390 // 1 if List register <n>, ICH_LR<n>_EL2, has an EOI maintenance
2391 // interrupt that has not been handled.
2392 //
2393 // For any ICH_LR<n>_EL2, the corresponding status bit is set to 1 if all
2394 // of the following are true:
2395 // - ICH_LR<n>_EL2.State is 0b00 (ICH_LR_EL2_STATE_INVALID).
2396 // - ICH_LR<n>_EL2.HW is 0.
2397 // - ICH_LR<n>_EL2.EOI (bit [41]) is 1.
2398
2399 uint64_t value = 0;
2400
2401 for (int lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) {
2402 ICH_LR_EL2 ich_lr_el2 =
2403 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
2404
2405 if ((ich_lr_el2.State == ICH_LR_EL2_STATE_INVALID) &&
2406 !ich_lr_el2.HW && ich_lr_el2.EOI) {
2407 value |= (1 << lr_idx);
2408 }
2409 }
2410
2411 return value;
2412}
2413
2414Gicv3CPUInterface::ICH_MISR_EL2
2415Gicv3CPUInterface::maintenanceInterruptStatus() const
2416{
2417 // Comments are copied from SPEC section 9.4.7 (ID012119)
2418 ICH_MISR_EL2 ich_misr_el2 = 0;
2419 ICH_HCR_EL2 ich_hcr_el2 =
2420 isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
2421 ICH_VMCR_EL2 ich_vmcr_el2 =
2422 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
2423
2424 // End Of Interrupt. [bit 0]
2425 // This maintenance interrupt is asserted when at least one bit in
2426 // ICH_EISR_EL2 is 1.
2427
2428 if (eoiMaintenanceInterruptStatus()) {
2429 ich_misr_el2.EOI = 1;
2430 }
2431
2432 // Underflow. [bit 1]
2433 // This maintenance interrupt is asserted when ICH_HCR_EL2.UIE==1 and
2434 // zero or one of the List register entries are marked as a valid
2435 // interrupt, that is, if the corresponding ICH_LR<n>_EL2.State bits
2436 // do not equal 0x0.
2437 uint32_t num_valid_interrupts = 0;
2438 uint32_t num_pending_interrupts = 0;
2439
2440 for (int lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) {
2441 ICH_LR_EL2 ich_lr_el2 =
2442 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
2443
2444 if (ich_lr_el2.State != ICH_LR_EL2_STATE_INVALID) {
2445 num_valid_interrupts++;
2446 }
2447
2448 if (ich_lr_el2.State == ICH_LR_EL2_STATE_PENDING) {
2449 num_pending_interrupts++;
2450 }
2451 }
2452
2453 if (ich_hcr_el2.UIE && (num_valid_interrupts < 2)) {
2454 ich_misr_el2.U = 1;
2455 }
2456
2457 // List Register Entry Not Present. [bit 2]
2458 // This maintenance interrupt is asserted when ICH_HCR_EL2.LRENPIE==1
2459 // and ICH_HCR_EL2.EOIcount is non-zero.
2460 if (ich_hcr_el2.LRENPIE && ich_hcr_el2.EOIcount) {
2461 ich_misr_el2.LRENP = 1;
2462 }
2463
2464 // No Pending. [bit 3]
2465 // This maintenance interrupt is asserted when ICH_HCR_EL2.NPIE==1 and
2466 // no List register is in pending state.
2467 if (ich_hcr_el2.NPIE && (num_pending_interrupts == 0)) {
2468 ich_misr_el2.NP = 1;
2469 }
2470
2471 // vPE Group 0 Enabled. [bit 4]
2472 // This maintenance interrupt is asserted when
2473 // ICH_HCR_EL2.VGrp0EIE==1 and ICH_VMCR_EL2.VENG0==1.
2474 if (ich_hcr_el2.VGrp0EIE && ich_vmcr_el2.VENG0) {
2475 ich_misr_el2.VGrp0E = 1;
2476 }
2477
2478 // vPE Group 0 Disabled. [bit 5]
2479 // This maintenance interrupt is asserted when
2480 // ICH_HCR_EL2.VGrp0DIE==1 and ICH_VMCR_EL2.VENG0==0.
2481 if (ich_hcr_el2.VGrp0DIE && !ich_vmcr_el2.VENG0) {
2482 ich_misr_el2.VGrp0D = 1;
2483 }
2484
2485 // vPE Group 1 Enabled. [bit 6]
2486 // This maintenance interrupt is asserted when
2487 // ICH_HCR_EL2.VGrp1EIE==1 and ICH_VMCR_EL2.VENG1==is 1.
2488 if (ich_hcr_el2.VGrp1EIE && ich_vmcr_el2.VENG1) {
2489 ich_misr_el2.VGrp1E = 1;
2490 }
2491
2492 // vPE Group 1 Disabled. [bit 7]
2493 // This maintenance interrupt is asserted when
2494 // ICH_HCR_EL2.VGrp1DIE==1 and ICH_VMCR_EL2.VENG1==is 0.
2495 if (ich_hcr_el2.VGrp1DIE && !ich_vmcr_el2.VENG1) {
2496 ich_misr_el2.VGrp1D = 1;
2497 }
2498
2499 return ich_misr_el2;
2500}
2501
2502void
2503Gicv3CPUInterface::serialize(CheckpointOut & cp) const
2504{
2505 SERIALIZE_SCALAR(hppi.intid);
2506 SERIALIZE_SCALAR(hppi.prio);
2507 SERIALIZE_ENUM(hppi.group);
2508}
2509
2510void
2511Gicv3CPUInterface::unserialize(CheckpointIn & cp)
2512{
2513 UNSERIALIZE_SCALAR(hppi.intid);
2514 UNSERIALIZE_SCALAR(hppi.prio);
2515 UNSERIALIZE_ENUM(hppi.group);
2516}
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