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 *
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 value = isa->readMiscRegNoEffect(MISCREG_ICC_BPR0_EL1);
313 break;
314 }
315
316 // Binary Point Register 1
317 case MISCREG_ICC_BPR1:
318 case MISCREG_ICC_BPR1_EL1: {
319 value = bpr1(isSecureBelowEL3() ? Gicv3::G1S : Gicv3::G1NS);
320 break;
321 }
322
323 // Virtual Binary Point Register 0
324 case MISCREG_ICV_BPR0_EL1: {
325 ICH_VMCR_EL2 ich_vmcr_el2 =
326 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
327
328 value = ich_vmcr_el2.VBPR0;
329 break;
330 }
331
332 // Virtual Binary Point Register 1
333 case MISCREG_ICV_BPR1_EL1: {
334 ICH_VMCR_EL2 ich_vmcr_el2 =
335 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
336
337 if (ich_vmcr_el2.VCBPR) {
338 // bpr0 + 1 saturated to 7, WI
339 value = ich_vmcr_el2.VBPR0 + 1;
340 value = value < 7 ? value : 7;
341 } else {
342 value = ich_vmcr_el2.VBPR1;
343 }
344
345 break;
346 }
347
348 // Interrupt Priority Mask Register
349 case MISCREG_ICC_PMR:
350 case MISCREG_ICC_PMR_EL1:
351 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) {
352 return readMiscReg(MISCREG_ICV_PMR_EL1);
353 }
354
355 if (haveEL(EL3) && !inSecureState() &&
356 (isa->readMiscRegNoEffect(MISCREG_SCR_EL3) & (1U << 2))) {
357 // Spec section 4.8.1
358 // For Non-secure access to ICC_PMR_EL1 when SCR_EL3.FIQ == 1:
359 if ((value & 0x80) == 0) {
360 // If the current priority mask value is in the range of
361 // 0x00-0x7F a read access returns the value 0x00.
362 value = 0;
363 } else if (value != 0xff) {
364 // If the current priority mask value is in the range of
365 // 0x80-0xFF a read access returns the Non-secure read of the
366 // current value.
367 value = (value << 1) & 0xff;
368 }
369 }
370
371 break;
372
373 case MISCREG_ICV_PMR_EL1: { // Priority Mask Register
374 ICH_VMCR_EL2 ich_vmcr_el2 =
375 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
376
377 value = ich_vmcr_el2.VPMR;
378 break;
379 }
380
381 // Interrupt Acknowledge Register 0
382 case MISCREG_ICC_IAR0:
383 case MISCREG_ICC_IAR0_EL1: {
384 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
385 return readMiscReg(MISCREG_ICV_IAR0_EL1);
386 }
387
388 uint32_t int_id;
389
390 if (hppiCanPreempt()) {
391 int_id = getHPPIR0();
392
393 // avoid activation for special interrupts
394 if (int_id < Gicv3::INTID_SECURE ||
395 int_id >= Gicv3Redistributor::SMALLEST_LPI_ID) {
396 activateIRQ(int_id, hppi.group);
397 }
398 } else {
399 int_id = Gicv3::INTID_SPURIOUS;
400 }
401
402 value = int_id;
403 break;
404 }
405
406 // Virtual Interrupt Acknowledge Register 0
407 case MISCREG_ICV_IAR0_EL1: {
408 int lr_idx = getHPPVILR();
409 uint32_t int_id = Gicv3::INTID_SPURIOUS;
410
411 if (lr_idx >= 0) {
412 ICH_LR_EL2 ich_lr_el2 =
413 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
414
415 if (!ich_lr_el2.Group && hppviCanPreempt(lr_idx)) {
416 int_id = ich_lr_el2.vINTID;
417
418 if (int_id < Gicv3::INTID_SECURE ||
419 int_id > Gicv3::INTID_SPURIOUS) {
420 virtualActivateIRQ(lr_idx);
421 } else {
422 // Bogus... Pseudocode says:
423 // - Move from pending to invalid...
424 // - Return de bogus id...
425 ich_lr_el2.State = ICH_LR_EL2_STATE_INVALID;
426 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx,
427 ich_lr_el2);
428 }
429 }
430 }
431
432 value = int_id;
433 virtualUpdate();
434 break;
435 }
436
437 // Interrupt Acknowledge Register 1
438 case MISCREG_ICC_IAR1:
439 case MISCREG_ICC_IAR1_EL1: {
440 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
441 return readMiscReg(MISCREG_ICV_IAR1_EL1);
442 }
443
444 uint32_t int_id;
445
446 if (hppiCanPreempt()) {
447 int_id = getHPPIR1();
448
449 // avoid activation for special interrupts
450 if (int_id < Gicv3::INTID_SECURE ||
451 int_id >= Gicv3Redistributor::SMALLEST_LPI_ID) {
452 activateIRQ(int_id, hppi.group);
453 }
454 } else {
455 int_id = Gicv3::INTID_SPURIOUS;
456 }
457
458 value = int_id;
459 break;
460 }
461
462 // Virtual Interrupt Acknowledge Register 1
463 case MISCREG_ICV_IAR1_EL1: {
464 int lr_idx = getHPPVILR();
465 uint32_t int_id = Gicv3::INTID_SPURIOUS;
466
467 if (lr_idx >= 0) {
468 ICH_LR_EL2 ich_lr_el2 =
469 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
470
471 if (ich_lr_el2.Group && hppviCanPreempt(lr_idx)) {
472 int_id = ich_lr_el2.vINTID;
473
474 if (int_id < Gicv3::INTID_SECURE ||
475 int_id > Gicv3::INTID_SPURIOUS) {
476 virtualActivateIRQ(lr_idx);
477 } else {
478 // Bogus... Pseudocode says:
479 // - Move from pending to invalid...
480 // - Return de bogus id...
481 ich_lr_el2.State = ICH_LR_EL2_STATE_INVALID;
482 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx,
483 ich_lr_el2);
484 }
485 }
486 }
487
488 value = int_id;
489 virtualUpdate();
490 break;
491 }
492
493 // System Register Enable Register EL1
494 case MISCREG_ICC_SRE:
495 case MISCREG_ICC_SRE_EL1: {
496 /*
497 * DIB [2] == 1 (IRQ bypass not supported, RAO/WI)
498 * DFB [1] == 1 (FIQ bypass not supported, RAO/WI)
499 * SRE [0] == 1 (Only system register interface supported, RAO/WI)
500 */
501 ICC_SRE_EL1 icc_sre_el1 = 0;
502 icc_sre_el1.SRE = 1;
503 icc_sre_el1.DIB = 1;
504 icc_sre_el1.DFB = 1;
505 value = icc_sre_el1;
506 break;
507 }
508
509 // System Register Enable Register EL2
510 case MISCREG_ICC_HSRE:
511 case MISCREG_ICC_SRE_EL2: {
512 /*
513 * Enable [3] == 1
514 * (EL1 accesses to ICC_SRE_EL1 do not trap to EL2, RAO/WI)
515 * DIB [2] == 1 (IRQ bypass not supported, RAO/WI)
516 * DFB [1] == 1 (FIQ bypass not supported, RAO/WI)
517 * SRE [0] == 1 (Only system register interface supported, RAO/WI)
518 */
519 ICC_SRE_EL2 icc_sre_el2 = 0;
520 icc_sre_el2.SRE = 1;
521 icc_sre_el2.DIB = 1;
522 icc_sre_el2.DFB = 1;
523 icc_sre_el2.Enable = 1;
524 value = icc_sre_el2;
525 break;
526 }
527
528 // System Register Enable Register EL3
529 case MISCREG_ICC_MSRE:
530 case MISCREG_ICC_SRE_EL3: {
531 /*
532 * Enable [3] == 1
533 * (EL1 accesses to ICC_SRE_EL1 do not trap to EL3.
534 * EL2 accesses to ICC_SRE_EL1 and ICC_SRE_EL2 do not trap to EL3.
535 * RAO/WI)
536 * DIB [2] == 1 (IRQ bypass not supported, RAO/WI)
537 * DFB [1] == 1 (FIQ bypass not supported, RAO/WI)
538 * SRE [0] == 1 (Only system register interface supported, RAO/WI)
539 */
540 ICC_SRE_EL3 icc_sre_el3 = 0;
541 icc_sre_el3.SRE = 1;
542 icc_sre_el3.DIB = 1;
543 icc_sre_el3.DFB = 1;
544 icc_sre_el3.Enable = 1;
545 value = icc_sre_el3;
546 break;
547 }
548
549 // Control Register
550 case MISCREG_ICC_CTLR:
551 case MISCREG_ICC_CTLR_EL1: {
552 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) {
553 return readMiscReg(MISCREG_ICV_CTLR_EL1);
554 }
555
556 // Enforce value for RO bits
557 // ExtRange [19], INTIDs in the range 1024..8191 not supported
558 // RSS [18], SGIs with affinity level 0 values of 0-255 are supported
559 // A3V [15], supports non-zero values of the Aff3 field in SGI
560 // generation System registers
561 // SEIS [14], does not support generation of SEIs (deprecated)
562 // IDbits [13:11], 001 = 24 bits | 000 = 16 bits
563 // PRIbits [10:8], number of priority bits implemented, minus one
564 ICC_CTLR_EL1 icc_ctlr_el1 = value;
565 icc_ctlr_el1.ExtRange = 0;
566 icc_ctlr_el1.RSS = 1;
567 icc_ctlr_el1.A3V = 1;
568 icc_ctlr_el1.SEIS = 0;
569 icc_ctlr_el1.IDbits = 1;
570 icc_ctlr_el1.PRIbits = PRIORITY_BITS - 1;
571 value = icc_ctlr_el1;
572 break;
573 }
574
575 // Virtual Control Register
576 case MISCREG_ICV_CTLR_EL1: {
577 ICV_CTLR_EL1 icv_ctlr_el1 = value;
578 icv_ctlr_el1.RSS = 0;
579 icv_ctlr_el1.A3V = 1;
580 icv_ctlr_el1.SEIS = 0;
581 icv_ctlr_el1.IDbits = 1;
582 icv_ctlr_el1.PRIbits = 7;
583 value = icv_ctlr_el1;
584 break;
585 }
586
587 // Control Register
588 case MISCREG_ICC_MCTLR:
589 case MISCREG_ICC_CTLR_EL3: {
590 // Enforce value for RO bits
591 // ExtRange [19], INTIDs in the range 1024..8191 not supported
592 // RSS [18], SGIs with affinity level 0 values of 0-255 are supported
593 // nDS [17], supports disabling of security
594 // A3V [15], supports non-zero values of the Aff3 field in SGI
595 // generation System registers
596 // SEIS [14], does not support generation of SEIs (deprecated)
597 // IDbits [13:11], 001 = 24 bits | 000 = 16 bits
598 // PRIbits [10:8], number of priority bits implemented, minus one
599 ICC_CTLR_EL3 icc_ctlr_el3 = value;
600 icc_ctlr_el3.ExtRange = 0;
601 icc_ctlr_el3.RSS = 1;
602 icc_ctlr_el3.nDS = 0;
603 icc_ctlr_el3.A3V = 1;
604 icc_ctlr_el3.SEIS = 0;
605 icc_ctlr_el3.IDbits = 0;
606 icc_ctlr_el3.PRIbits = PRIORITY_BITS - 1;
607 value = icc_ctlr_el3;
608 break;
609 }
610
611 // Hyp Control Register
612 case MISCREG_ICH_HCR:
613 case MISCREG_ICH_HCR_EL2:
614 break;
615
616 // Hyp Active Priorities Group 0 Registers
617 case MISCREG_ICH_AP0R0:
618 case MISCREG_ICH_AP0R0_EL2:
619 break;
620
621 // only implemented if supporting 6 or more bits of priority
622 case MISCREG_ICH_AP0R1:
623 case MISCREG_ICH_AP0R1_EL2:
624 // only implemented if supporting 7 or more bits of priority
625 case MISCREG_ICH_AP0R2:
626 case MISCREG_ICH_AP0R2_EL2:
627 // only implemented if supporting 7 or more bits of priority
628 case MISCREG_ICH_AP0R3:
629 case MISCREG_ICH_AP0R3_EL2:
630 // Unimplemented registers are RAZ/WI
631 return 0;
632
633 // Hyp Active Priorities Group 1 Registers
634 case MISCREG_ICH_AP1R0:
635 case MISCREG_ICH_AP1R0_EL2:
636 break;
637
638 // only implemented if supporting 6 or more bits of priority
639 case MISCREG_ICH_AP1R1:
640 case MISCREG_ICH_AP1R1_EL2:
641 // only implemented if supporting 7 or more bits of priority
642 case MISCREG_ICH_AP1R2:
643 case MISCREG_ICH_AP1R2_EL2:
644 // only implemented if supporting 7 or more bits of priority
645 case MISCREG_ICH_AP1R3:
646 case MISCREG_ICH_AP1R3_EL2:
647 // Unimplemented registers are RAZ/WI
648 return 0;
649
650 // Maintenance Interrupt State Register
651 case MISCREG_ICH_MISR:
652 case MISCREG_ICH_MISR_EL2:
653 value = maintenanceInterruptStatus();
654 break;
655
656 // VGIC Type Register
657 case MISCREG_ICH_VTR:
658 case MISCREG_ICH_VTR_EL2: {
659 ICH_VTR_EL2 ich_vtr_el2 = value;
660
661 ich_vtr_el2.ListRegs = VIRTUAL_NUM_LIST_REGS - 1;
662 ich_vtr_el2.A3V = 1;
663 ich_vtr_el2.IDbits = 1;
664 ich_vtr_el2.PREbits = VIRTUAL_PREEMPTION_BITS - 1;
665 ich_vtr_el2.PRIbits = VIRTUAL_PRIORITY_BITS - 1;
666
667 value = ich_vtr_el2;
668 break;
669 }
670
671 // End of Interrupt Status Register
672 case MISCREG_ICH_EISR:
673 case MISCREG_ICH_EISR_EL2:
674 value = eoiMaintenanceInterruptStatus();
675 break;
676
677 // Empty List Register Status Register
678 case MISCREG_ICH_ELRSR:
679 case MISCREG_ICH_ELRSR_EL2:
680 value = 0;
681
682 for (int lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) {
683 ICH_LR_EL2 ich_lr_el2 =
684 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
685
686 if ((ich_lr_el2.State == ICH_LR_EL2_STATE_INVALID) &&
687 (ich_lr_el2.HW || !ich_lr_el2.EOI)) {
688 value |= (1 << lr_idx);
689 }
690 }
691
692 break;
693
694 // List Registers
695 case MISCREG_ICH_LRC0 ... MISCREG_ICH_LRC15:
696 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 high half part)
697 value = value >> 32;
698 break;
699
700 // List Registers
701 case MISCREG_ICH_LR0 ... MISCREG_ICH_LR15:
702 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 low half part)
703 value = value & 0xffffffff;
704 break;
705
706 // List Registers
707 case MISCREG_ICH_LR0_EL2 ... MISCREG_ICH_LR15_EL2:
708 break;
709
710 // Virtual Machine Control Register
711 case MISCREG_ICH_VMCR:
712 case MISCREG_ICH_VMCR_EL2:
713 break;
714
715 default:
716 panic("Gicv3CPUInterface::readMiscReg(): unknown register %d (%s)",
717 misc_reg, miscRegName[misc_reg]);
718 }
719
720 DPRINTF(GIC, "Gicv3CPUInterface::readMiscReg(): register %s value %#x\n",
721 miscRegName[misc_reg], value);
722 return value;
723}
724
725void
726Gicv3CPUInterface::setMiscReg(int misc_reg, RegVal val)
727{
728 bool do_virtual_update = false;
729 DPRINTF(GIC, "Gicv3CPUInterface::setMiscReg(): register %s value %#x\n",
730 miscRegName[misc_reg], val);
731 bool hcr_fmo = getHCREL2FMO();
732 bool hcr_imo = getHCREL2IMO();
733
734 switch (misc_reg) {
735 // Active Priorities Group 1 Registers
736 case MISCREG_ICC_AP1R0:
737 case MISCREG_ICC_AP1R0_EL1:
738 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
739 return isa->setMiscRegNoEffect(MISCREG_ICV_AP1R0_EL1, val);
740 }
741
742 break;
743
744 case MISCREG_ICC_AP1R1:
745 case MISCREG_ICC_AP1R1_EL1:
746
747 // only implemented if supporting 6 or more bits of priority
748 case MISCREG_ICC_AP1R2:
749 case MISCREG_ICC_AP1R2_EL1:
750
751 // only implemented if supporting 7 or more bits of priority
752 case MISCREG_ICC_AP1R3:
753 case MISCREG_ICC_AP1R3_EL1:
754 // only implemented if supporting 7 or more bits of priority
755 break;
756
757 // Active Priorities Group 0 Registers
758 case MISCREG_ICC_AP0R0:
759 case MISCREG_ICC_AP0R0_EL1:
760 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
761 return isa->setMiscRegNoEffect(MISCREG_ICV_AP0R0_EL1, val);
762 }
763
764 break;
765
766 case MISCREG_ICC_AP0R1:
767 case MISCREG_ICC_AP0R1_EL1:
768
769 // only implemented if supporting 6 or more bits of priority
770 case MISCREG_ICC_AP0R2:
771 case MISCREG_ICC_AP0R2_EL1:
772
773 // only implemented if supporting 7 or more bits of priority
774 case MISCREG_ICC_AP0R3:
775 case MISCREG_ICC_AP0R3_EL1:
776 // only implemented if supporting 7 or more bits of priority
777 break;
778
779 // End Of Interrupt Register 0
780 case MISCREG_ICC_EOIR0:
781 case MISCREG_ICC_EOIR0_EL1: { // End Of Interrupt Register 0
782 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
783 return setMiscReg(MISCREG_ICV_EOIR0_EL1, val);
784 }
785
786 int int_id = val & 0xffffff;
787
788 // avoid activation for special interrupts
789 if (int_id >= Gicv3::INTID_SECURE &&
790 int_id <= Gicv3::INTID_SPURIOUS) {
791 return;
792 }
793
794 Gicv3::GroupId group = Gicv3::G0S;
795
796 if (highestActiveGroup() != group) {
797 return;
798 }
799
800 dropPriority(group);
801
802 if (!isEOISplitMode()) {
803 deactivateIRQ(int_id, group);
804 }
805
806 break;
807 }
808
809 // Virtual End Of Interrupt Register 0
810 case MISCREG_ICV_EOIR0_EL1: {
811 int int_id = val & 0xffffff;
812
813 // avoid deactivation for special interrupts
814 if (int_id >= Gicv3::INTID_SECURE &&
815 int_id <= Gicv3::INTID_SPURIOUS) {
816 return;
817 }
818
819 uint8_t drop_prio = virtualDropPriority();
820
821 if (drop_prio == 0xff) {
822 return;
823 }
824
825 int lr_idx = virtualFindActive(int_id);
826
827 if (lr_idx < 0) {
828 // No LR found matching
829 virtualIncrementEOICount();
830 } else {
831 ICH_LR_EL2 ich_lr_el2 =
832 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
833 Gicv3::GroupId lr_group =
834 ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S;
835 uint8_t lr_group_prio = ich_lr_el2.Priority & 0xf8;
836
837 if (lr_group == Gicv3::G0S && lr_group_prio == drop_prio) {
838 //if (!virtualIsEOISplitMode())
839 {
840 virtualDeactivateIRQ(lr_idx);
841 }
842 }
843 }
844
845 virtualUpdate();
846 break;
847 }
848
849 // End Of Interrupt Register 1
850 case MISCREG_ICC_EOIR1:
851 case MISCREG_ICC_EOIR1_EL1: {
852 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
853 return setMiscReg(MISCREG_ICV_EOIR1_EL1, val);
854 }
855
856 int int_id = val & 0xffffff;
857
858 // avoid deactivation for special interrupts
859 if (int_id >= Gicv3::INTID_SECURE &&
860 int_id <= Gicv3::INTID_SPURIOUS) {
861 return;
862 }
863
864 Gicv3::GroupId group = inSecureState() ? Gicv3::G1S : Gicv3::G1NS;
865
866 if (highestActiveGroup() == Gicv3::G0S) {
867 return;
868 }
869
870 if (distributor->DS == 0) {
871 if (highestActiveGroup() == Gicv3::G1S && !inSecureState()) {
872 return;
873 } else if (highestActiveGroup() == Gicv3::G1NS &&
874 !(!inSecureState() or (currEL() == EL3))) {
875 return;
876 }
877 }
878
879 dropPriority(group);
880
881 if (!isEOISplitMode()) {
882 deactivateIRQ(int_id, group);
883 }
884
885 break;
886 }
887
888 // Virtual End Of Interrupt Register 1
889 case MISCREG_ICV_EOIR1_EL1: {
890 int int_id = val & 0xffffff;
891
892 // avoid deactivation for special interrupts
893 if (int_id >= Gicv3::INTID_SECURE &&
894 int_id <= Gicv3::INTID_SPURIOUS) {
895 return;
896 }
897
898 uint8_t drop_prio = virtualDropPriority();
899
900 if (drop_prio == 0xff) {
901 return;
902 }
903
904 int lr_idx = virtualFindActive(int_id);
905
906 if (lr_idx < 0) {
907 // No matching LR found
908 virtualIncrementEOICount();
909 } else {
910 ICH_LR_EL2 ich_lr_el2 =
911 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
912 Gicv3::GroupId lr_group =
913 ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S;
914 uint8_t lr_group_prio = ich_lr_el2.Priority & 0xf8;
915
916 if (lr_group == Gicv3::G1NS && lr_group_prio == drop_prio) {
917 if (!virtualIsEOISplitMode()) {
918 virtualDeactivateIRQ(lr_idx);
919 }
920 }
921 }
922
923 virtualUpdate();
924 break;
925 }
926
927 // Deactivate Interrupt Register
928 case MISCREG_ICC_DIR:
929 case MISCREG_ICC_DIR_EL1: {
930 if ((currEL() == EL1) && !inSecureState() &&
931 (hcr_imo || hcr_fmo)) {
932 return setMiscReg(MISCREG_ICV_DIR_EL1, val);
933 }
934
935 int int_id = val & 0xffffff;
936
937 // The following checks are as per spec pseudocode
938 // aarch64/support/ICC_DIR_EL1
939
940 // Check for spurious ID
941 if (int_id >= Gicv3::INTID_SECURE) {
942 return;
943 }
944
945 // EOI mode is not set, so don't deactivate
946 if (!isEOISplitMode()) {
947 return;
948 }
949
950 Gicv3::GroupId group =
951 int_id >= 32 ? distributor->getIntGroup(int_id) :
952 redistributor->getIntGroup(int_id);
953 bool irq_is_grp0 = group == Gicv3::G0S;
954 bool single_sec_state = distributor->DS;
955 bool irq_is_secure = !single_sec_state && (group != Gicv3::G1NS);
956 SCR scr_el3 = isa->readMiscRegNoEffect(MISCREG_SCR_EL3);
957 bool route_fiq_to_el3 = scr_el3.fiq;
958 bool route_irq_to_el3 = scr_el3.irq;
959 bool route_fiq_to_el2 = hcr_fmo;
960 bool route_irq_to_el2 = hcr_imo;
961
962 switch (currEL()) {
963 case EL3:
964 break;
965
966 case EL2:
967 if (single_sec_state && irq_is_grp0 && !route_fiq_to_el3) {
968 break;
969 }
970
971 if (!irq_is_secure && !irq_is_grp0 && !route_irq_to_el3) {
972 break;
973 }
974
975 return;
976
977 case EL1:
978 if (!isSecureBelowEL3()) {
979 if (single_sec_state && irq_is_grp0 &&
980 !route_fiq_to_el3 && !route_fiq_to_el2) {
981 break;
982 }
983
984 if (!irq_is_secure && !irq_is_grp0 &&
985 !route_irq_to_el3 && !route_irq_to_el2) {
986 break;
987 }
988 } else {
989 if (irq_is_grp0 && !route_fiq_to_el3) {
990 break;
991 }
992
993 if (!irq_is_grp0 &&
994 (!irq_is_secure || !single_sec_state) &&
995 !route_irq_to_el3) {
996 break;
997 }
998 }
999
1000 return;
1001
1002 default:
1003 break;
1004 }
1005
1006 deactivateIRQ(int_id, group);
1007 break;
1008 }
1009
1010 // Deactivate Virtual Interrupt Register
1011 case MISCREG_ICV_DIR_EL1: {
1012 int int_id = val & 0xffffff;
1013
1014 // avoid deactivation for special interrupts
1015 if (int_id >= Gicv3::INTID_SECURE &&
1016 int_id <= Gicv3::INTID_SPURIOUS) {
1017 return;
1018 }
1019
1020 if (!virtualIsEOISplitMode()) {
1021 return;
1022 }
1023
1024 int lr_idx = virtualFindActive(int_id);
1025
1026 if (lr_idx < 0) {
1027 // No matching LR found
1028 virtualIncrementEOICount();
1029 } else {
1030 virtualDeactivateIRQ(lr_idx);
1031 }
1032
1033 virtualUpdate();
1034 break;
1035 }
1036
1037 // Binary Point Register 0
1038 case MISCREG_ICC_BPR0:
1039 case MISCREG_ICC_BPR0_EL1: {
1040 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
1041 return setMiscReg(MISCREG_ICV_BPR0_EL1, val);
1042 }
1043 break;
1044 }
1045 // Binary Point Register 1
1046 case MISCREG_ICC_BPR1:
1047 case MISCREG_ICC_BPR1_EL1: {
1048 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
1049 return setMiscReg(MISCREG_ICV_BPR1_EL1, val);
1050 }
1051
1052 val &= 0x7;
1053
1054 if (isSecureBelowEL3()) {
1055 // group == Gicv3::G1S
1056 ICC_CTLR_EL1 icc_ctlr_el1_s =
1057 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S);
1058
1059 val = val > GIC_MIN_BPR ? val : GIC_MIN_BPR;
1060 if (haveEL(EL3) && !isEL3OrMon() && icc_ctlr_el1_s.CBPR) {
1061 isa->setMiscRegNoEffect(MISCREG_ICC_BPR0_EL1, val);
1062 } else {
1063 isa->setMiscRegNoEffect(MISCREG_ICC_BPR1_EL1_S, val);
1064 }
1065 return;
1066 } else {
1067 // group == Gicv3::G1NS
1068 ICC_CTLR_EL1 icc_ctlr_el1_ns =
1069 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS);
1070
1071 val = val > GIC_MIN_BPR_NS ? val : GIC_MIN_BPR_NS;
1072 if (haveEL(EL3) && !isEL3OrMon() && icc_ctlr_el1_ns.CBPR) {
1073 // Non secure writes from EL1 and EL2 are ignored
1074 } else {
1075 isa->setMiscRegNoEffect(MISCREG_ICC_BPR1_EL1_NS, val);
1076 }
1077 return;
1078 }
1079
1080 break;
1081 }
1082
1083 // Virtual Binary Point Register 0
1084 case MISCREG_ICV_BPR0_EL1:
1085 // Virtual Binary Point Register 1
1086 case MISCREG_ICV_BPR1_EL1: {
1087 Gicv3::GroupId group =
1088 misc_reg == MISCREG_ICV_BPR0_EL1 ? Gicv3::G0S : Gicv3::G1NS;
1089 ICH_VMCR_EL2 ich_vmcr_el2 =
1090 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1091
1092 if ((group == Gicv3::G1NS) && ich_vmcr_el2.VCBPR) {
1093 // BPR0 + 1 saturated to 7, WI
1094 return;
1095 }
1096
1097 uint8_t min_VPBR = 7 - VIRTUAL_PREEMPTION_BITS;
1098
1099 if (group != Gicv3::G0S) {
1100 min_VPBR++;
1101 }
1102
1103 if (val < min_VPBR) {
1104 val = min_VPBR;
1105 }
1106
1107 if (group == Gicv3::G0S) {
1108 ich_vmcr_el2.VBPR0 = val;
1109 } else {
1110 ich_vmcr_el2.VBPR1 = val;
1111 }
1112
1113 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1114 do_virtual_update = true;
1115 break;
1116 }
1117
1118 // Control Register EL1
1119 case MISCREG_ICC_CTLR:
1120 case MISCREG_ICC_CTLR_EL1: {
1121 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) {
1122 return setMiscReg(MISCREG_ICV_CTLR_EL1, val);
1123 }
1124
1125 /*
1126 * ExtRange is RO.
1127 * RSS is RO.
1128 * A3V is RO.
1129 * SEIS is RO.
1130 * IDbits is RO.
1131 * PRIbits is RO.
1132 */
1133 ICC_CTLR_EL1 requested_icc_ctlr_el1 = val;
1134 ICC_CTLR_EL1 icc_ctlr_el1 =
1135 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1);
1136
1137 ICC_CTLR_EL3 icc_ctlr_el3 =
1138 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3);
1139
1140 // The following could be refactored but it is following
1141 // spec description section 9.2.6 point by point.
1142
1143 // PMHE
1144 if (haveEL(EL3)) {
1145 // PMHE is alias of ICC_CTLR_EL3.PMHE
1146
1147 if (distributor->DS == 0) {
1148 // PMHE is RO
1149 } else if (distributor->DS == 1) {
1150 // PMHE is RW
1151 icc_ctlr_el1.PMHE = requested_icc_ctlr_el1.PMHE;
1152 icc_ctlr_el3.PMHE = icc_ctlr_el1.PMHE;
1153 }
1154 } else {
1155 // PMHE is RW (by implementation choice)
1156 icc_ctlr_el1.PMHE = requested_icc_ctlr_el1.PMHE;
1157 }
1158
1159 // EOImode
1160 icc_ctlr_el1.EOImode = requested_icc_ctlr_el1.EOImode;
1161
1162 if (inSecureState()) {
1163 // EOIMode is alias of ICC_CTLR_EL3.EOImode_EL1S
1164 icc_ctlr_el3.EOImode_EL1S = icc_ctlr_el1.EOImode;
1165 } else {
1166 // EOIMode is alias of ICC_CTLR_EL3.EOImode_EL1NS
1167 icc_ctlr_el3.EOImode_EL1NS = icc_ctlr_el1.EOImode;
1168 }
1169
1170 // CBPR
1171 if (haveEL(EL3)) {
1172 // CBPR is alias of ICC_CTLR_EL3.CBPR_EL1{S,NS}
1173
1174 if (distributor->DS == 0) {
1175 // CBPR is RO
1176 } else {
1177 // CBPR is RW
1178 icc_ctlr_el1.CBPR = requested_icc_ctlr_el1.CBPR;
1179
1180 if (inSecureState()) {
1181 icc_ctlr_el3.CBPR_EL1S = icc_ctlr_el1.CBPR;
1182 } else {
1183 icc_ctlr_el3.CBPR_EL1NS = icc_ctlr_el1.CBPR;
1184 }
1185 }
1186 } else {
1187 // CBPR is RW
1188 icc_ctlr_el1.CBPR = requested_icc_ctlr_el1.CBPR;
1189 }
1190
1191 isa->setMiscRegNoEffect(MISCREG_ICC_CTLR_EL3, icc_ctlr_el3);
1192
1193 val = icc_ctlr_el1;
1194 break;
1195 }
1196
1197 // Virtual Control Register
1198 case MISCREG_ICV_CTLR_EL1: {
1199 ICV_CTLR_EL1 requested_icv_ctlr_el1 = val;
1200 ICV_CTLR_EL1 icv_ctlr_el1 =
1201 isa->readMiscRegNoEffect(MISCREG_ICV_CTLR_EL1);
1202 icv_ctlr_el1.EOImode = requested_icv_ctlr_el1.EOImode;
1203 icv_ctlr_el1.CBPR = requested_icv_ctlr_el1.CBPR;
1204 val = icv_ctlr_el1;
1205
1206 // Aliases
1207 // ICV_CTLR_EL1.CBPR aliases ICH_VMCR_EL2.VCBPR.
1208 // ICV_CTLR_EL1.EOImode aliases ICH_VMCR_EL2.VEOIM.
1209 ICH_VMCR_EL2 ich_vmcr_el2 =
1210 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1211 ich_vmcr_el2.VCBPR = icv_ctlr_el1.CBPR;
1212 ich_vmcr_el2.VEOIM = icv_ctlr_el1.EOImode;
1213 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1214 break;
1215 }
1216
1217 // Control Register EL3
1218 case MISCREG_ICC_MCTLR:
1219 case MISCREG_ICC_CTLR_EL3: {
1220 /*
1221 * ExtRange is RO.
1222 * RSS is RO.
1223 * nDS is RO.
1224 * A3V is RO.
1225 * SEIS is RO.
1226 * IDbits is RO.
1227 * PRIbits is RO.
1228 * PMHE is RAO/WI, priority-based routing is always used.
1229 */
1230 ICC_CTLR_EL3 requested_icc_ctlr_el3 = val;
1231
1232 // Aliases
1233 if (haveEL(EL3))
1234 {
1235 ICC_CTLR_EL1 icc_ctlr_el1_s =
1236 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S);
1237 ICC_CTLR_EL1 icc_ctlr_el1_ns =
1238 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS);
1239
1240 // ICC_CTLR_EL1(NS).EOImode is an alias of
1241 // ICC_CTLR_EL3.EOImode_EL1NS
1242 icc_ctlr_el1_ns.EOImode = requested_icc_ctlr_el3.EOImode_EL1NS;
1243 // ICC_CTLR_EL1(S).EOImode is an alias of
1244 // ICC_CTLR_EL3.EOImode_EL1S
1245 icc_ctlr_el1_s.EOImode = requested_icc_ctlr_el3.EOImode_EL1S;
1246 // ICC_CTLR_EL1(NS).CBPR is an alias of ICC_CTLR_EL3.CBPR_EL1NS
1247 icc_ctlr_el1_ns.CBPR = requested_icc_ctlr_el3.CBPR_EL1NS;
1248 // ICC_CTLR_EL1(S).CBPR is an alias of ICC_CTLR_EL3.CBPR_EL1S
1249 icc_ctlr_el1_s.CBPR = requested_icc_ctlr_el3.CBPR_EL1S;
1250
1251 isa->setMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S, icc_ctlr_el1_s);
1252 isa->setMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS,
1253 icc_ctlr_el1_ns);
1254 }
1255
1256 ICC_CTLR_EL3 icc_ctlr_el3 =
1257 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3);
1258
1259 icc_ctlr_el3.RM = requested_icc_ctlr_el3.RM;
1260 icc_ctlr_el3.EOImode_EL1NS = requested_icc_ctlr_el3.EOImode_EL1NS;
1261 icc_ctlr_el3.EOImode_EL1S = requested_icc_ctlr_el3.EOImode_EL1S;
1262 icc_ctlr_el3.EOImode_EL3 = requested_icc_ctlr_el3.EOImode_EL3;
1263 icc_ctlr_el3.CBPR_EL1NS = requested_icc_ctlr_el3.CBPR_EL1NS;
1264 icc_ctlr_el3.CBPR_EL1S = requested_icc_ctlr_el3.CBPR_EL1S;
1265
1266 val = icc_ctlr_el3;
1267 break;
1268 }
1269
1270 // Priority Mask Register
1271 case MISCREG_ICC_PMR:
1272 case MISCREG_ICC_PMR_EL1: {
1273 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) {
1274 return setMiscReg(MISCREG_ICV_PMR_EL1, val);
1275 }
1276
1277 val &= 0xff;
1278 SCR scr_el3 = isa->readMiscRegNoEffect(MISCREG_SCR_EL3);
1279
1280 if (haveEL(EL3) && !inSecureState() && (scr_el3.fiq)) {
1281 // Spec section 4.8.1
1282 // For Non-secure access to ICC_PMR_EL1 SCR_EL3.FIQ == 1:
1283 RegVal old_icc_pmr_el1 =
1284 isa->readMiscRegNoEffect(MISCREG_ICC_PMR_EL1);
1285
1286 if (!(old_icc_pmr_el1 & 0x80)) {
1287 // If the current priority mask value is in the range of
1288 // 0x00-0x7F then WI
1289 return;
1290 }
1291
1292 // If the current priority mask value is in the range of
1293 // 0x80-0xFF then a write access to ICC_PMR_EL1 succeeds,
1294 // based on the Non-secure read of the priority mask value
1295 // written to the register.
1296
1297 val = (val >> 1) | 0x80;
1298 }
1299
1300 val &= ~0U << (8 - PRIORITY_BITS);
1301 break;
1302 }
1303
1304 case MISCREG_ICV_PMR_EL1: { // Priority Mask Register
1305 ICH_VMCR_EL2 ich_vmcr_el2 =
1306 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1307 ich_vmcr_el2.VPMR = val & 0xff;
1308
1309 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1310 virtualUpdate();
1311 return;
1312 }
1313
1314 // Interrupt Group 0 Enable Register EL1
1315 case MISCREG_ICC_IGRPEN0:
1316 case MISCREG_ICC_IGRPEN0_EL1: {
1317 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
1318 return setMiscReg(MISCREG_ICV_IGRPEN0_EL1, val);
1319 }
1320
1321 break;
1322 }
1323
1324 // Virtual Interrupt Group 0 Enable register
1325 case MISCREG_ICV_IGRPEN0_EL1: {
1326 bool enable = val & 0x1;
1327 ICH_VMCR_EL2 ich_vmcr_el2 =
1328 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1329 ich_vmcr_el2.VENG0 = enable;
1330 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1331 virtualUpdate();
1332 return;
1333 }
1334
1335 // Interrupt Group 1 Enable register EL1
1336 case MISCREG_ICC_IGRPEN1:
1337 case MISCREG_ICC_IGRPEN1_EL1: {
1338 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
1339 return setMiscReg(MISCREG_ICV_IGRPEN1_EL1, val);
1340 }
1341
1342 if (haveEL(EL3)) {
1343 ICC_IGRPEN1_EL1 icc_igrpen1_el1 = val;
1344 ICC_IGRPEN1_EL3 icc_igrpen1_el3 =
1345 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL3);
1346
1347 if (inSecureState()) {
1348 // Enable is RW alias of ICC_IGRPEN1_EL3.EnableGrp1S
1349 icc_igrpen1_el3.EnableGrp1S = icc_igrpen1_el1.Enable;
1350 } else {
1351 // Enable is RW alias of ICC_IGRPEN1_EL3.EnableGrp1NS
1352 icc_igrpen1_el3.EnableGrp1NS = icc_igrpen1_el1.Enable;
1353 }
1354
1355 isa->setMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL3,
1356 icc_igrpen1_el3);
1357 }
1358
1359 break;
1360 }
1361
1362 // Virtual Interrupt Group 1 Enable register
1363 case MISCREG_ICV_IGRPEN1_EL1: {
1364 bool enable = val & 0x1;
1365 ICH_VMCR_EL2 ich_vmcr_el2 =
1366 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1367 ich_vmcr_el2.VENG1 = enable;
1368 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1369 virtualUpdate();
1370 return;
1371 }
1372
1373 // Interrupt Group 1 Enable register
1374 case MISCREG_ICC_MGRPEN1:
1375 case MISCREG_ICC_IGRPEN1_EL3: {
1376 ICC_IGRPEN1_EL3 icc_igrpen1_el3 = val;
1377 ICC_IGRPEN1_EL1 icc_igrpen1_el1 =
1378 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1);
1379
1380 if (inSecureState()) {
1381 // ICC_IGRPEN1_EL1.Enable is RW alias of EnableGrp1S
1382 icc_igrpen1_el1.Enable = icc_igrpen1_el3.EnableGrp1S;
1383 } else {
1384 // ICC_IGRPEN1_EL1.Enable is RW alias of EnableGrp1NS
1385 icc_igrpen1_el1.Enable = icc_igrpen1_el3.EnableGrp1NS;
1386 }
1387
1388 isa->setMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1, icc_igrpen1_el1);
1389 break;
1390 }
1391
1392 // Software Generated Interrupt Group 0 Register
1393 case MISCREG_ICC_SGI0R:
1394 case MISCREG_ICC_SGI0R_EL1:
1395 generateSGI(val, Gicv3::G0S);
1396 break;
1397
1398 // Software Generated Interrupt Group 1 Register
1399 case MISCREG_ICC_SGI1R:
1400 case MISCREG_ICC_SGI1R_EL1: {
1401 Gicv3::GroupId group = inSecureState() ? Gicv3::G1S : Gicv3::G1NS;
1402
1403 generateSGI(val, group);
1404 break;
1405 }
1406
1407 // Alias Software Generated Interrupt Group 1 Register
1408 case MISCREG_ICC_ASGI1R:
1409 case MISCREG_ICC_ASGI1R_EL1: {
1410 Gicv3::GroupId group = inSecureState() ? Gicv3::G1NS : Gicv3::G1S;
1411
1412 generateSGI(val, group);
1413 break;
1414 }
1415
1416 // System Register Enable Register EL1
1417 case MISCREG_ICC_SRE:
1418 case MISCREG_ICC_SRE_EL1:
1419 // System Register Enable Register EL2
1420 case MISCREG_ICC_HSRE:
1421 case MISCREG_ICC_SRE_EL2:
1422 // System Register Enable Register EL3
1423 case MISCREG_ICC_MSRE:
1424 case MISCREG_ICC_SRE_EL3:
1425 // All bits are RAO/WI
1426 return;
1427
1428 // Hyp Control Register
1429 case MISCREG_ICH_HCR:
1430 case MISCREG_ICH_HCR_EL2: {
1431 ICH_HCR_EL2 requested_ich_hcr_el2 = val;
1432 ICH_HCR_EL2 ich_hcr_el2 =
1433 isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
1434
1435 if (requested_ich_hcr_el2.EOIcount >= ich_hcr_el2.EOIcount)
1436 {
1437 // EOIcount - Permitted behaviors are:
1438 // - Increment EOIcount.
1439 // - Leave EOIcount unchanged.
1440 ich_hcr_el2.EOIcount = requested_ich_hcr_el2.EOIcount;
1441 }
1442
1443 ich_hcr_el2.TDIR = requested_ich_hcr_el2.TDIR;
1444 ich_hcr_el2.TSEI = requested_ich_hcr_el2.TSEI;
1445 ich_hcr_el2.TALL1 = requested_ich_hcr_el2.TALL1;;
1446 ich_hcr_el2.TALL0 = requested_ich_hcr_el2.TALL0;;
1447 ich_hcr_el2.TC = requested_ich_hcr_el2.TC;
1448 ich_hcr_el2.VGrp1DIE = requested_ich_hcr_el2.VGrp1DIE;
1449 ich_hcr_el2.VGrp1EIE = requested_ich_hcr_el2.VGrp1EIE;
1450 ich_hcr_el2.VGrp0DIE = requested_ich_hcr_el2.VGrp0DIE;
1451 ich_hcr_el2.VGrp0EIE = requested_ich_hcr_el2.VGrp0EIE;
1452 ich_hcr_el2.NPIE = requested_ich_hcr_el2.NPIE;
1453 ich_hcr_el2.LRENPIE = requested_ich_hcr_el2.LRENPIE;
1454 ich_hcr_el2.UIE = requested_ich_hcr_el2.UIE;
1455 ich_hcr_el2.En = requested_ich_hcr_el2.En;
1456 val = ich_hcr_el2;
1457 do_virtual_update = true;
1458 break;
1459 }
1460
1461 // List Registers
1462 case MISCREG_ICH_LRC0 ... MISCREG_ICH_LRC15: {
1463 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 high half part)
1464 ICH_LRC requested_ich_lrc = val;
1465 ICH_LRC ich_lrc = isa->readMiscRegNoEffect(misc_reg);
1466
1467 ich_lrc.State = requested_ich_lrc.State;
1468 ich_lrc.HW = requested_ich_lrc.HW;
1469 ich_lrc.Group = requested_ich_lrc.Group;
1470
1471 // Priority, bits [23:16]
1472 // At least five bits must be implemented.
1473 // Unimplemented bits are RES0 and start from bit[16] up to bit[18].
1474 // We implement 5 bits.
1475 ich_lrc.Priority = (requested_ich_lrc.Priority & 0xf8) |
1476 (ich_lrc.Priority & 0x07);
1477
1478 // pINTID, bits [12:0]
1479 // When ICH_LR<n>.HW is 0 this field has the following meaning:
1480 // - Bits[12:10] : RES0.
1481 // - Bit[9] : EOI.
1482 // - Bits[8:0] : RES0.
1483 // When ICH_LR<n>.HW is 1:
1484 // - This field is only required to implement enough bits to hold a
1485 // valid value for the implemented INTID size. Any unused higher
1486 // order bits are RES0.
1487 if (requested_ich_lrc.HW == 0) {
1488 ich_lrc.EOI = requested_ich_lrc.EOI;
1489 } else {
1490 ich_lrc.pINTID = requested_ich_lrc.pINTID;
1491 }
1492
1493 val = ich_lrc;
1494 do_virtual_update = true;
1495 break;
1496 }
1497
1498 // List Registers
1499 case MISCREG_ICH_LR0 ... MISCREG_ICH_LR15: {
1500 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 low half part)
1501 RegVal old_val = isa->readMiscRegNoEffect(misc_reg);
1502 val = (old_val & 0xffffffff00000000) | (val & 0xffffffff);
1503 do_virtual_update = true;
1504 break;
1505 }
1506
1507 // List Registers
1508 case MISCREG_ICH_LR0_EL2 ... MISCREG_ICH_LR15_EL2: { // AArch64
1509 ICH_LR_EL2 requested_ich_lr_el2 = val;
1510 ICH_LR_EL2 ich_lr_el2 = isa->readMiscRegNoEffect(misc_reg);
1511
1512 ich_lr_el2.State = requested_ich_lr_el2.State;
1513 ich_lr_el2.HW = requested_ich_lr_el2.HW;
1514 ich_lr_el2.Group = requested_ich_lr_el2.Group;
1515
1516 // Priority, bits [55:48]
1517 // At least five bits must be implemented.
1518 // Unimplemented bits are RES0 and start from bit[48] up to bit[50].
1519 // We implement 5 bits.
1520 ich_lr_el2.Priority = (requested_ich_lr_el2.Priority & 0xf8) |
1521 (ich_lr_el2.Priority & 0x07);
1522
1523 // pINTID, bits [44:32]
1524 // When ICH_LR<n>_EL2.HW is 0 this field has the following meaning:
1525 // - Bits[44:42] : RES0.
1526 // - Bit[41] : EOI.
1527 // - Bits[40:32] : RES0.
1528 // When ICH_LR<n>_EL2.HW is 1:
1529 // - This field is only required to implement enough bits to hold a
1530 // valid value for the implemented INTID size. Any unused higher
1531 // order bits are RES0.
1532 if (requested_ich_lr_el2.HW == 0) {
1533 ich_lr_el2.EOI = requested_ich_lr_el2.EOI;
1534 } else {
1535 ich_lr_el2.pINTID = requested_ich_lr_el2.pINTID;
1536 }
1537
1538 // vINTID, bits [31:0]
1539 // It is IMPLEMENTATION DEFINED how many bits are implemented,
1540 // though at least 16 bits must be implemented.
1541 // Unimplemented bits are RES0.
1542 ich_lr_el2.vINTID = requested_ich_lr_el2.vINTID;
1543
1544 val = ich_lr_el2;
1545 do_virtual_update = true;
1546 break;
1547 }
1548
1549 // Virtual Machine Control Register
1550 case MISCREG_ICH_VMCR:
1551 case MISCREG_ICH_VMCR_EL2: {
1552 ICH_VMCR_EL2 requested_ich_vmcr_el2 = val;
1553 ICH_VMCR_EL2 ich_vmcr_el2 =
1554 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1555 ich_vmcr_el2.VPMR = requested_ich_vmcr_el2.VPMR;
1556 uint8_t min_vpr0 = 7 - VIRTUAL_PREEMPTION_BITS;
1557
1558 if (requested_ich_vmcr_el2.VBPR0 < min_vpr0) {
1559 ich_vmcr_el2.VBPR0 = min_vpr0;
1560 } else {
1561 ich_vmcr_el2.VBPR0 = requested_ich_vmcr_el2.VBPR0;
1562 }
1563
1564 uint8_t min_vpr1 = min_vpr0 + 1;
1565
1566 if (requested_ich_vmcr_el2.VBPR1 < min_vpr1) {
1567 ich_vmcr_el2.VBPR1 = min_vpr1;
1568 } else {
1569 ich_vmcr_el2.VBPR1 = requested_ich_vmcr_el2.VBPR1;
1570 }
1571
1572 ich_vmcr_el2.VEOIM = requested_ich_vmcr_el2.VEOIM;
1573 ich_vmcr_el2.VCBPR = requested_ich_vmcr_el2.VCBPR;
1574 ich_vmcr_el2.VENG1 = requested_ich_vmcr_el2.VENG1;
1575 ich_vmcr_el2.VENG0 = requested_ich_vmcr_el2.VENG0;
1576 val = ich_vmcr_el2;
1577 break;
1578 }
1579
1580 // Hyp Active Priorities Group 0 Registers
1581 case MISCREG_ICH_AP0R0:
1582 case MISCREG_ICH_AP0R0_EL2:
1583 break;
1584
1585 // only implemented if supporting 6 or more bits of priority
1586 case MISCREG_ICH_AP0R1:
1587 case MISCREG_ICH_AP0R1_EL2:
1588 // only implemented if supporting 7 or more bits of priority
1589 case MISCREG_ICH_AP0R2:
1590 case MISCREG_ICH_AP0R2_EL2:
1591 // only implemented if supporting 7 or more bits of priority
1592 case MISCREG_ICH_AP0R3:
1593 case MISCREG_ICH_AP0R3_EL2:
1594 // Unimplemented registers are RAZ/WI
1595 return;
1596
1597 // Hyp Active Priorities Group 1 Registers
1598 case MISCREG_ICH_AP1R0:
1599 case MISCREG_ICH_AP1R0_EL2:
1600 break;
1601
1602 // only implemented if supporting 6 or more bits of priority
1603 case MISCREG_ICH_AP1R1:
1604 case MISCREG_ICH_AP1R1_EL2:
1605 // only implemented if supporting 7 or more bits of priority
1606 case MISCREG_ICH_AP1R2:
1607 case MISCREG_ICH_AP1R2_EL2:
1608 // only implemented if supporting 7 or more bits of priority
1609 case MISCREG_ICH_AP1R3:
1610 case MISCREG_ICH_AP1R3_EL2:
1611 // Unimplemented registers are RAZ/WI
1612 return;
1613
1614 default:
1615 panic("Gicv3CPUInterface::setMiscReg(): unknown register %d (%s)",
1616 misc_reg, miscRegName[misc_reg]);
1617 }
1618
1619 isa->setMiscRegNoEffect(misc_reg, val);
1620
1621 if (do_virtual_update) {
1622 virtualUpdate();
1623 }
1624}
1625
| 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 *
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 value = isa->readMiscRegNoEffect(MISCREG_ICC_BPR0_EL1);
313 break;
314 }
315
316 // Binary Point Register 1
317 case MISCREG_ICC_BPR1:
318 case MISCREG_ICC_BPR1_EL1: {
319 value = bpr1(isSecureBelowEL3() ? Gicv3::G1S : Gicv3::G1NS);
320 break;
321 }
322
323 // Virtual Binary Point Register 0
324 case MISCREG_ICV_BPR0_EL1: {
325 ICH_VMCR_EL2 ich_vmcr_el2 =
326 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
327
328 value = ich_vmcr_el2.VBPR0;
329 break;
330 }
331
332 // Virtual Binary Point Register 1
333 case MISCREG_ICV_BPR1_EL1: {
334 ICH_VMCR_EL2 ich_vmcr_el2 =
335 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
336
337 if (ich_vmcr_el2.VCBPR) {
338 // bpr0 + 1 saturated to 7, WI
339 value = ich_vmcr_el2.VBPR0 + 1;
340 value = value < 7 ? value : 7;
341 } else {
342 value = ich_vmcr_el2.VBPR1;
343 }
344
345 break;
346 }
347
348 // Interrupt Priority Mask Register
349 case MISCREG_ICC_PMR:
350 case MISCREG_ICC_PMR_EL1:
351 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) {
352 return readMiscReg(MISCREG_ICV_PMR_EL1);
353 }
354
355 if (haveEL(EL3) && !inSecureState() &&
356 (isa->readMiscRegNoEffect(MISCREG_SCR_EL3) & (1U << 2))) {
357 // Spec section 4.8.1
358 // For Non-secure access to ICC_PMR_EL1 when SCR_EL3.FIQ == 1:
359 if ((value & 0x80) == 0) {
360 // If the current priority mask value is in the range of
361 // 0x00-0x7F a read access returns the value 0x00.
362 value = 0;
363 } else if (value != 0xff) {
364 // If the current priority mask value is in the range of
365 // 0x80-0xFF a read access returns the Non-secure read of the
366 // current value.
367 value = (value << 1) & 0xff;
368 }
369 }
370
371 break;
372
373 case MISCREG_ICV_PMR_EL1: { // Priority Mask Register
374 ICH_VMCR_EL2 ich_vmcr_el2 =
375 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
376
377 value = ich_vmcr_el2.VPMR;
378 break;
379 }
380
381 // Interrupt Acknowledge Register 0
382 case MISCREG_ICC_IAR0:
383 case MISCREG_ICC_IAR0_EL1: {
384 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
385 return readMiscReg(MISCREG_ICV_IAR0_EL1);
386 }
387
388 uint32_t int_id;
389
390 if (hppiCanPreempt()) {
391 int_id = getHPPIR0();
392
393 // avoid activation for special interrupts
394 if (int_id < Gicv3::INTID_SECURE ||
395 int_id >= Gicv3Redistributor::SMALLEST_LPI_ID) {
396 activateIRQ(int_id, hppi.group);
397 }
398 } else {
399 int_id = Gicv3::INTID_SPURIOUS;
400 }
401
402 value = int_id;
403 break;
404 }
405
406 // Virtual Interrupt Acknowledge Register 0
407 case MISCREG_ICV_IAR0_EL1: {
408 int lr_idx = getHPPVILR();
409 uint32_t int_id = Gicv3::INTID_SPURIOUS;
410
411 if (lr_idx >= 0) {
412 ICH_LR_EL2 ich_lr_el2 =
413 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
414
415 if (!ich_lr_el2.Group && hppviCanPreempt(lr_idx)) {
416 int_id = ich_lr_el2.vINTID;
417
418 if (int_id < Gicv3::INTID_SECURE ||
419 int_id > Gicv3::INTID_SPURIOUS) {
420 virtualActivateIRQ(lr_idx);
421 } else {
422 // Bogus... Pseudocode says:
423 // - Move from pending to invalid...
424 // - Return de bogus id...
425 ich_lr_el2.State = ICH_LR_EL2_STATE_INVALID;
426 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx,
427 ich_lr_el2);
428 }
429 }
430 }
431
432 value = int_id;
433 virtualUpdate();
434 break;
435 }
436
437 // Interrupt Acknowledge Register 1
438 case MISCREG_ICC_IAR1:
439 case MISCREG_ICC_IAR1_EL1: {
440 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
441 return readMiscReg(MISCREG_ICV_IAR1_EL1);
442 }
443
444 uint32_t int_id;
445
446 if (hppiCanPreempt()) {
447 int_id = getHPPIR1();
448
449 // avoid activation for special interrupts
450 if (int_id < Gicv3::INTID_SECURE ||
451 int_id >= Gicv3Redistributor::SMALLEST_LPI_ID) {
452 activateIRQ(int_id, hppi.group);
453 }
454 } else {
455 int_id = Gicv3::INTID_SPURIOUS;
456 }
457
458 value = int_id;
459 break;
460 }
461
462 // Virtual Interrupt Acknowledge Register 1
463 case MISCREG_ICV_IAR1_EL1: {
464 int lr_idx = getHPPVILR();
465 uint32_t int_id = Gicv3::INTID_SPURIOUS;
466
467 if (lr_idx >= 0) {
468 ICH_LR_EL2 ich_lr_el2 =
469 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
470
471 if (ich_lr_el2.Group && hppviCanPreempt(lr_idx)) {
472 int_id = ich_lr_el2.vINTID;
473
474 if (int_id < Gicv3::INTID_SECURE ||
475 int_id > Gicv3::INTID_SPURIOUS) {
476 virtualActivateIRQ(lr_idx);
477 } else {
478 // Bogus... Pseudocode says:
479 // - Move from pending to invalid...
480 // - Return de bogus id...
481 ich_lr_el2.State = ICH_LR_EL2_STATE_INVALID;
482 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx,
483 ich_lr_el2);
484 }
485 }
486 }
487
488 value = int_id;
489 virtualUpdate();
490 break;
491 }
492
493 // System Register Enable Register EL1
494 case MISCREG_ICC_SRE:
495 case MISCREG_ICC_SRE_EL1: {
496 /*
497 * DIB [2] == 1 (IRQ bypass not supported, RAO/WI)
498 * DFB [1] == 1 (FIQ bypass not supported, RAO/WI)
499 * SRE [0] == 1 (Only system register interface supported, RAO/WI)
500 */
501 ICC_SRE_EL1 icc_sre_el1 = 0;
502 icc_sre_el1.SRE = 1;
503 icc_sre_el1.DIB = 1;
504 icc_sre_el1.DFB = 1;
505 value = icc_sre_el1;
506 break;
507 }
508
509 // System Register Enable Register EL2
510 case MISCREG_ICC_HSRE:
511 case MISCREG_ICC_SRE_EL2: {
512 /*
513 * Enable [3] == 1
514 * (EL1 accesses to ICC_SRE_EL1 do not trap to EL2, RAO/WI)
515 * DIB [2] == 1 (IRQ bypass not supported, RAO/WI)
516 * DFB [1] == 1 (FIQ bypass not supported, RAO/WI)
517 * SRE [0] == 1 (Only system register interface supported, RAO/WI)
518 */
519 ICC_SRE_EL2 icc_sre_el2 = 0;
520 icc_sre_el2.SRE = 1;
521 icc_sre_el2.DIB = 1;
522 icc_sre_el2.DFB = 1;
523 icc_sre_el2.Enable = 1;
524 value = icc_sre_el2;
525 break;
526 }
527
528 // System Register Enable Register EL3
529 case MISCREG_ICC_MSRE:
530 case MISCREG_ICC_SRE_EL3: {
531 /*
532 * Enable [3] == 1
533 * (EL1 accesses to ICC_SRE_EL1 do not trap to EL3.
534 * EL2 accesses to ICC_SRE_EL1 and ICC_SRE_EL2 do not trap to EL3.
535 * RAO/WI)
536 * DIB [2] == 1 (IRQ bypass not supported, RAO/WI)
537 * DFB [1] == 1 (FIQ bypass not supported, RAO/WI)
538 * SRE [0] == 1 (Only system register interface supported, RAO/WI)
539 */
540 ICC_SRE_EL3 icc_sre_el3 = 0;
541 icc_sre_el3.SRE = 1;
542 icc_sre_el3.DIB = 1;
543 icc_sre_el3.DFB = 1;
544 icc_sre_el3.Enable = 1;
545 value = icc_sre_el3;
546 break;
547 }
548
549 // Control Register
550 case MISCREG_ICC_CTLR:
551 case MISCREG_ICC_CTLR_EL1: {
552 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) {
553 return readMiscReg(MISCREG_ICV_CTLR_EL1);
554 }
555
556 // Enforce value for RO bits
557 // ExtRange [19], INTIDs in the range 1024..8191 not supported
558 // RSS [18], SGIs with affinity level 0 values of 0-255 are supported
559 // A3V [15], supports non-zero values of the Aff3 field in SGI
560 // generation System registers
561 // SEIS [14], does not support generation of SEIs (deprecated)
562 // IDbits [13:11], 001 = 24 bits | 000 = 16 bits
563 // PRIbits [10:8], number of priority bits implemented, minus one
564 ICC_CTLR_EL1 icc_ctlr_el1 = value;
565 icc_ctlr_el1.ExtRange = 0;
566 icc_ctlr_el1.RSS = 1;
567 icc_ctlr_el1.A3V = 1;
568 icc_ctlr_el1.SEIS = 0;
569 icc_ctlr_el1.IDbits = 1;
570 icc_ctlr_el1.PRIbits = PRIORITY_BITS - 1;
571 value = icc_ctlr_el1;
572 break;
573 }
574
575 // Virtual Control Register
576 case MISCREG_ICV_CTLR_EL1: {
577 ICV_CTLR_EL1 icv_ctlr_el1 = value;
578 icv_ctlr_el1.RSS = 0;
579 icv_ctlr_el1.A3V = 1;
580 icv_ctlr_el1.SEIS = 0;
581 icv_ctlr_el1.IDbits = 1;
582 icv_ctlr_el1.PRIbits = 7;
583 value = icv_ctlr_el1;
584 break;
585 }
586
587 // Control Register
588 case MISCREG_ICC_MCTLR:
589 case MISCREG_ICC_CTLR_EL3: {
590 // Enforce value for RO bits
591 // ExtRange [19], INTIDs in the range 1024..8191 not supported
592 // RSS [18], SGIs with affinity level 0 values of 0-255 are supported
593 // nDS [17], supports disabling of security
594 // A3V [15], supports non-zero values of the Aff3 field in SGI
595 // generation System registers
596 // SEIS [14], does not support generation of SEIs (deprecated)
597 // IDbits [13:11], 001 = 24 bits | 000 = 16 bits
598 // PRIbits [10:8], number of priority bits implemented, minus one
599 ICC_CTLR_EL3 icc_ctlr_el3 = value;
600 icc_ctlr_el3.ExtRange = 0;
601 icc_ctlr_el3.RSS = 1;
602 icc_ctlr_el3.nDS = 0;
603 icc_ctlr_el3.A3V = 1;
604 icc_ctlr_el3.SEIS = 0;
605 icc_ctlr_el3.IDbits = 0;
606 icc_ctlr_el3.PRIbits = PRIORITY_BITS - 1;
607 value = icc_ctlr_el3;
608 break;
609 }
610
611 // Hyp Control Register
612 case MISCREG_ICH_HCR:
613 case MISCREG_ICH_HCR_EL2:
614 break;
615
616 // Hyp Active Priorities Group 0 Registers
617 case MISCREG_ICH_AP0R0:
618 case MISCREG_ICH_AP0R0_EL2:
619 break;
620
621 // only implemented if supporting 6 or more bits of priority
622 case MISCREG_ICH_AP0R1:
623 case MISCREG_ICH_AP0R1_EL2:
624 // only implemented if supporting 7 or more bits of priority
625 case MISCREG_ICH_AP0R2:
626 case MISCREG_ICH_AP0R2_EL2:
627 // only implemented if supporting 7 or more bits of priority
628 case MISCREG_ICH_AP0R3:
629 case MISCREG_ICH_AP0R3_EL2:
630 // Unimplemented registers are RAZ/WI
631 return 0;
632
633 // Hyp Active Priorities Group 1 Registers
634 case MISCREG_ICH_AP1R0:
635 case MISCREG_ICH_AP1R0_EL2:
636 break;
637
638 // only implemented if supporting 6 or more bits of priority
639 case MISCREG_ICH_AP1R1:
640 case MISCREG_ICH_AP1R1_EL2:
641 // only implemented if supporting 7 or more bits of priority
642 case MISCREG_ICH_AP1R2:
643 case MISCREG_ICH_AP1R2_EL2:
644 // only implemented if supporting 7 or more bits of priority
645 case MISCREG_ICH_AP1R3:
646 case MISCREG_ICH_AP1R3_EL2:
647 // Unimplemented registers are RAZ/WI
648 return 0;
649
650 // Maintenance Interrupt State Register
651 case MISCREG_ICH_MISR:
652 case MISCREG_ICH_MISR_EL2:
653 value = maintenanceInterruptStatus();
654 break;
655
656 // VGIC Type Register
657 case MISCREG_ICH_VTR:
658 case MISCREG_ICH_VTR_EL2: {
659 ICH_VTR_EL2 ich_vtr_el2 = value;
660
661 ich_vtr_el2.ListRegs = VIRTUAL_NUM_LIST_REGS - 1;
662 ich_vtr_el2.A3V = 1;
663 ich_vtr_el2.IDbits = 1;
664 ich_vtr_el2.PREbits = VIRTUAL_PREEMPTION_BITS - 1;
665 ich_vtr_el2.PRIbits = VIRTUAL_PRIORITY_BITS - 1;
666
667 value = ich_vtr_el2;
668 break;
669 }
670
671 // End of Interrupt Status Register
672 case MISCREG_ICH_EISR:
673 case MISCREG_ICH_EISR_EL2:
674 value = eoiMaintenanceInterruptStatus();
675 break;
676
677 // Empty List Register Status Register
678 case MISCREG_ICH_ELRSR:
679 case MISCREG_ICH_ELRSR_EL2:
680 value = 0;
681
682 for (int lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) {
683 ICH_LR_EL2 ich_lr_el2 =
684 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
685
686 if ((ich_lr_el2.State == ICH_LR_EL2_STATE_INVALID) &&
687 (ich_lr_el2.HW || !ich_lr_el2.EOI)) {
688 value |= (1 << lr_idx);
689 }
690 }
691
692 break;
693
694 // List Registers
695 case MISCREG_ICH_LRC0 ... MISCREG_ICH_LRC15:
696 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 high half part)
697 value = value >> 32;
698 break;
699
700 // List Registers
701 case MISCREG_ICH_LR0 ... MISCREG_ICH_LR15:
702 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 low half part)
703 value = value & 0xffffffff;
704 break;
705
706 // List Registers
707 case MISCREG_ICH_LR0_EL2 ... MISCREG_ICH_LR15_EL2:
708 break;
709
710 // Virtual Machine Control Register
711 case MISCREG_ICH_VMCR:
712 case MISCREG_ICH_VMCR_EL2:
713 break;
714
715 default:
716 panic("Gicv3CPUInterface::readMiscReg(): unknown register %d (%s)",
717 misc_reg, miscRegName[misc_reg]);
718 }
719
720 DPRINTF(GIC, "Gicv3CPUInterface::readMiscReg(): register %s value %#x\n",
721 miscRegName[misc_reg], value);
722 return value;
723}
724
725void
726Gicv3CPUInterface::setMiscReg(int misc_reg, RegVal val)
727{
728 bool do_virtual_update = false;
729 DPRINTF(GIC, "Gicv3CPUInterface::setMiscReg(): register %s value %#x\n",
730 miscRegName[misc_reg], val);
731 bool hcr_fmo = getHCREL2FMO();
732 bool hcr_imo = getHCREL2IMO();
733
734 switch (misc_reg) {
735 // Active Priorities Group 1 Registers
736 case MISCREG_ICC_AP1R0:
737 case MISCREG_ICC_AP1R0_EL1:
738 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
739 return isa->setMiscRegNoEffect(MISCREG_ICV_AP1R0_EL1, val);
740 }
741
742 break;
743
744 case MISCREG_ICC_AP1R1:
745 case MISCREG_ICC_AP1R1_EL1:
746
747 // only implemented if supporting 6 or more bits of priority
748 case MISCREG_ICC_AP1R2:
749 case MISCREG_ICC_AP1R2_EL1:
750
751 // only implemented if supporting 7 or more bits of priority
752 case MISCREG_ICC_AP1R3:
753 case MISCREG_ICC_AP1R3_EL1:
754 // only implemented if supporting 7 or more bits of priority
755 break;
756
757 // Active Priorities Group 0 Registers
758 case MISCREG_ICC_AP0R0:
759 case MISCREG_ICC_AP0R0_EL1:
760 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
761 return isa->setMiscRegNoEffect(MISCREG_ICV_AP0R0_EL1, val);
762 }
763
764 break;
765
766 case MISCREG_ICC_AP0R1:
767 case MISCREG_ICC_AP0R1_EL1:
768
769 // only implemented if supporting 6 or more bits of priority
770 case MISCREG_ICC_AP0R2:
771 case MISCREG_ICC_AP0R2_EL1:
772
773 // only implemented if supporting 7 or more bits of priority
774 case MISCREG_ICC_AP0R3:
775 case MISCREG_ICC_AP0R3_EL1:
776 // only implemented if supporting 7 or more bits of priority
777 break;
778
779 // End Of Interrupt Register 0
780 case MISCREG_ICC_EOIR0:
781 case MISCREG_ICC_EOIR0_EL1: { // End Of Interrupt Register 0
782 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
783 return setMiscReg(MISCREG_ICV_EOIR0_EL1, val);
784 }
785
786 int int_id = val & 0xffffff;
787
788 // avoid activation for special interrupts
789 if (int_id >= Gicv3::INTID_SECURE &&
790 int_id <= Gicv3::INTID_SPURIOUS) {
791 return;
792 }
793
794 Gicv3::GroupId group = Gicv3::G0S;
795
796 if (highestActiveGroup() != group) {
797 return;
798 }
799
800 dropPriority(group);
801
802 if (!isEOISplitMode()) {
803 deactivateIRQ(int_id, group);
804 }
805
806 break;
807 }
808
809 // Virtual End Of Interrupt Register 0
810 case MISCREG_ICV_EOIR0_EL1: {
811 int int_id = val & 0xffffff;
812
813 // avoid deactivation for special interrupts
814 if (int_id >= Gicv3::INTID_SECURE &&
815 int_id <= Gicv3::INTID_SPURIOUS) {
816 return;
817 }
818
819 uint8_t drop_prio = virtualDropPriority();
820
821 if (drop_prio == 0xff) {
822 return;
823 }
824
825 int lr_idx = virtualFindActive(int_id);
826
827 if (lr_idx < 0) {
828 // No LR found matching
829 virtualIncrementEOICount();
830 } else {
831 ICH_LR_EL2 ich_lr_el2 =
832 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
833 Gicv3::GroupId lr_group =
834 ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S;
835 uint8_t lr_group_prio = ich_lr_el2.Priority & 0xf8;
836
837 if (lr_group == Gicv3::G0S && lr_group_prio == drop_prio) {
838 //if (!virtualIsEOISplitMode())
839 {
840 virtualDeactivateIRQ(lr_idx);
841 }
842 }
843 }
844
845 virtualUpdate();
846 break;
847 }
848
849 // End Of Interrupt Register 1
850 case MISCREG_ICC_EOIR1:
851 case MISCREG_ICC_EOIR1_EL1: {
852 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
853 return setMiscReg(MISCREG_ICV_EOIR1_EL1, val);
854 }
855
856 int int_id = val & 0xffffff;
857
858 // avoid deactivation for special interrupts
859 if (int_id >= Gicv3::INTID_SECURE &&
860 int_id <= Gicv3::INTID_SPURIOUS) {
861 return;
862 }
863
864 Gicv3::GroupId group = inSecureState() ? Gicv3::G1S : Gicv3::G1NS;
865
866 if (highestActiveGroup() == Gicv3::G0S) {
867 return;
868 }
869
870 if (distributor->DS == 0) {
871 if (highestActiveGroup() == Gicv3::G1S && !inSecureState()) {
872 return;
873 } else if (highestActiveGroup() == Gicv3::G1NS &&
874 !(!inSecureState() or (currEL() == EL3))) {
875 return;
876 }
877 }
878
879 dropPriority(group);
880
881 if (!isEOISplitMode()) {
882 deactivateIRQ(int_id, group);
883 }
884
885 break;
886 }
887
888 // Virtual End Of Interrupt Register 1
889 case MISCREG_ICV_EOIR1_EL1: {
890 int int_id = val & 0xffffff;
891
892 // avoid deactivation for special interrupts
893 if (int_id >= Gicv3::INTID_SECURE &&
894 int_id <= Gicv3::INTID_SPURIOUS) {
895 return;
896 }
897
898 uint8_t drop_prio = virtualDropPriority();
899
900 if (drop_prio == 0xff) {
901 return;
902 }
903
904 int lr_idx = virtualFindActive(int_id);
905
906 if (lr_idx < 0) {
907 // No matching LR found
908 virtualIncrementEOICount();
909 } else {
910 ICH_LR_EL2 ich_lr_el2 =
911 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
912 Gicv3::GroupId lr_group =
913 ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S;
914 uint8_t lr_group_prio = ich_lr_el2.Priority & 0xf8;
915
916 if (lr_group == Gicv3::G1NS && lr_group_prio == drop_prio) {
917 if (!virtualIsEOISplitMode()) {
918 virtualDeactivateIRQ(lr_idx);
919 }
920 }
921 }
922
923 virtualUpdate();
924 break;
925 }
926
927 // Deactivate Interrupt Register
928 case MISCREG_ICC_DIR:
929 case MISCREG_ICC_DIR_EL1: {
930 if ((currEL() == EL1) && !inSecureState() &&
931 (hcr_imo || hcr_fmo)) {
932 return setMiscReg(MISCREG_ICV_DIR_EL1, val);
933 }
934
935 int int_id = val & 0xffffff;
936
937 // The following checks are as per spec pseudocode
938 // aarch64/support/ICC_DIR_EL1
939
940 // Check for spurious ID
941 if (int_id >= Gicv3::INTID_SECURE) {
942 return;
943 }
944
945 // EOI mode is not set, so don't deactivate
946 if (!isEOISplitMode()) {
947 return;
948 }
949
950 Gicv3::GroupId group =
951 int_id >= 32 ? distributor->getIntGroup(int_id) :
952 redistributor->getIntGroup(int_id);
953 bool irq_is_grp0 = group == Gicv3::G0S;
954 bool single_sec_state = distributor->DS;
955 bool irq_is_secure = !single_sec_state && (group != Gicv3::G1NS);
956 SCR scr_el3 = isa->readMiscRegNoEffect(MISCREG_SCR_EL3);
957 bool route_fiq_to_el3 = scr_el3.fiq;
958 bool route_irq_to_el3 = scr_el3.irq;
959 bool route_fiq_to_el2 = hcr_fmo;
960 bool route_irq_to_el2 = hcr_imo;
961
962 switch (currEL()) {
963 case EL3:
964 break;
965
966 case EL2:
967 if (single_sec_state && irq_is_grp0 && !route_fiq_to_el3) {
968 break;
969 }
970
971 if (!irq_is_secure && !irq_is_grp0 && !route_irq_to_el3) {
972 break;
973 }
974
975 return;
976
977 case EL1:
978 if (!isSecureBelowEL3()) {
979 if (single_sec_state && irq_is_grp0 &&
980 !route_fiq_to_el3 && !route_fiq_to_el2) {
981 break;
982 }
983
984 if (!irq_is_secure && !irq_is_grp0 &&
985 !route_irq_to_el3 && !route_irq_to_el2) {
986 break;
987 }
988 } else {
989 if (irq_is_grp0 && !route_fiq_to_el3) {
990 break;
991 }
992
993 if (!irq_is_grp0 &&
994 (!irq_is_secure || !single_sec_state) &&
995 !route_irq_to_el3) {
996 break;
997 }
998 }
999
1000 return;
1001
1002 default:
1003 break;
1004 }
1005
1006 deactivateIRQ(int_id, group);
1007 break;
1008 }
1009
1010 // Deactivate Virtual Interrupt Register
1011 case MISCREG_ICV_DIR_EL1: {
1012 int int_id = val & 0xffffff;
1013
1014 // avoid deactivation for special interrupts
1015 if (int_id >= Gicv3::INTID_SECURE &&
1016 int_id <= Gicv3::INTID_SPURIOUS) {
1017 return;
1018 }
1019
1020 if (!virtualIsEOISplitMode()) {
1021 return;
1022 }
1023
1024 int lr_idx = virtualFindActive(int_id);
1025
1026 if (lr_idx < 0) {
1027 // No matching LR found
1028 virtualIncrementEOICount();
1029 } else {
1030 virtualDeactivateIRQ(lr_idx);
1031 }
1032
1033 virtualUpdate();
1034 break;
1035 }
1036
1037 // Binary Point Register 0
1038 case MISCREG_ICC_BPR0:
1039 case MISCREG_ICC_BPR0_EL1: {
1040 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
1041 return setMiscReg(MISCREG_ICV_BPR0_EL1, val);
1042 }
1043 break;
1044 }
1045 // Binary Point Register 1
1046 case MISCREG_ICC_BPR1:
1047 case MISCREG_ICC_BPR1_EL1: {
1048 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
1049 return setMiscReg(MISCREG_ICV_BPR1_EL1, val);
1050 }
1051
1052 val &= 0x7;
1053
1054 if (isSecureBelowEL3()) {
1055 // group == Gicv3::G1S
1056 ICC_CTLR_EL1 icc_ctlr_el1_s =
1057 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S);
1058
1059 val = val > GIC_MIN_BPR ? val : GIC_MIN_BPR;
1060 if (haveEL(EL3) && !isEL3OrMon() && icc_ctlr_el1_s.CBPR) {
1061 isa->setMiscRegNoEffect(MISCREG_ICC_BPR0_EL1, val);
1062 } else {
1063 isa->setMiscRegNoEffect(MISCREG_ICC_BPR1_EL1_S, val);
1064 }
1065 return;
1066 } else {
1067 // group == Gicv3::G1NS
1068 ICC_CTLR_EL1 icc_ctlr_el1_ns =
1069 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS);
1070
1071 val = val > GIC_MIN_BPR_NS ? val : GIC_MIN_BPR_NS;
1072 if (haveEL(EL3) && !isEL3OrMon() && icc_ctlr_el1_ns.CBPR) {
1073 // Non secure writes from EL1 and EL2 are ignored
1074 } else {
1075 isa->setMiscRegNoEffect(MISCREG_ICC_BPR1_EL1_NS, val);
1076 }
1077 return;
1078 }
1079
1080 break;
1081 }
1082
1083 // Virtual Binary Point Register 0
1084 case MISCREG_ICV_BPR0_EL1:
1085 // Virtual Binary Point Register 1
1086 case MISCREG_ICV_BPR1_EL1: {
1087 Gicv3::GroupId group =
1088 misc_reg == MISCREG_ICV_BPR0_EL1 ? Gicv3::G0S : Gicv3::G1NS;
1089 ICH_VMCR_EL2 ich_vmcr_el2 =
1090 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1091
1092 if ((group == Gicv3::G1NS) && ich_vmcr_el2.VCBPR) {
1093 // BPR0 + 1 saturated to 7, WI
1094 return;
1095 }
1096
1097 uint8_t min_VPBR = 7 - VIRTUAL_PREEMPTION_BITS;
1098
1099 if (group != Gicv3::G0S) {
1100 min_VPBR++;
1101 }
1102
1103 if (val < min_VPBR) {
1104 val = min_VPBR;
1105 }
1106
1107 if (group == Gicv3::G0S) {
1108 ich_vmcr_el2.VBPR0 = val;
1109 } else {
1110 ich_vmcr_el2.VBPR1 = val;
1111 }
1112
1113 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1114 do_virtual_update = true;
1115 break;
1116 }
1117
1118 // Control Register EL1
1119 case MISCREG_ICC_CTLR:
1120 case MISCREG_ICC_CTLR_EL1: {
1121 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) {
1122 return setMiscReg(MISCREG_ICV_CTLR_EL1, val);
1123 }
1124
1125 /*
1126 * ExtRange is RO.
1127 * RSS is RO.
1128 * A3V is RO.
1129 * SEIS is RO.
1130 * IDbits is RO.
1131 * PRIbits is RO.
1132 */
1133 ICC_CTLR_EL1 requested_icc_ctlr_el1 = val;
1134 ICC_CTLR_EL1 icc_ctlr_el1 =
1135 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1);
1136
1137 ICC_CTLR_EL3 icc_ctlr_el3 =
1138 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3);
1139
1140 // The following could be refactored but it is following
1141 // spec description section 9.2.6 point by point.
1142
1143 // PMHE
1144 if (haveEL(EL3)) {
1145 // PMHE is alias of ICC_CTLR_EL3.PMHE
1146
1147 if (distributor->DS == 0) {
1148 // PMHE is RO
1149 } else if (distributor->DS == 1) {
1150 // PMHE is RW
1151 icc_ctlr_el1.PMHE = requested_icc_ctlr_el1.PMHE;
1152 icc_ctlr_el3.PMHE = icc_ctlr_el1.PMHE;
1153 }
1154 } else {
1155 // PMHE is RW (by implementation choice)
1156 icc_ctlr_el1.PMHE = requested_icc_ctlr_el1.PMHE;
1157 }
1158
1159 // EOImode
1160 icc_ctlr_el1.EOImode = requested_icc_ctlr_el1.EOImode;
1161
1162 if (inSecureState()) {
1163 // EOIMode is alias of ICC_CTLR_EL3.EOImode_EL1S
1164 icc_ctlr_el3.EOImode_EL1S = icc_ctlr_el1.EOImode;
1165 } else {
1166 // EOIMode is alias of ICC_CTLR_EL3.EOImode_EL1NS
1167 icc_ctlr_el3.EOImode_EL1NS = icc_ctlr_el1.EOImode;
1168 }
1169
1170 // CBPR
1171 if (haveEL(EL3)) {
1172 // CBPR is alias of ICC_CTLR_EL3.CBPR_EL1{S,NS}
1173
1174 if (distributor->DS == 0) {
1175 // CBPR is RO
1176 } else {
1177 // CBPR is RW
1178 icc_ctlr_el1.CBPR = requested_icc_ctlr_el1.CBPR;
1179
1180 if (inSecureState()) {
1181 icc_ctlr_el3.CBPR_EL1S = icc_ctlr_el1.CBPR;
1182 } else {
1183 icc_ctlr_el3.CBPR_EL1NS = icc_ctlr_el1.CBPR;
1184 }
1185 }
1186 } else {
1187 // CBPR is RW
1188 icc_ctlr_el1.CBPR = requested_icc_ctlr_el1.CBPR;
1189 }
1190
1191 isa->setMiscRegNoEffect(MISCREG_ICC_CTLR_EL3, icc_ctlr_el3);
1192
1193 val = icc_ctlr_el1;
1194 break;
1195 }
1196
1197 // Virtual Control Register
1198 case MISCREG_ICV_CTLR_EL1: {
1199 ICV_CTLR_EL1 requested_icv_ctlr_el1 = val;
1200 ICV_CTLR_EL1 icv_ctlr_el1 =
1201 isa->readMiscRegNoEffect(MISCREG_ICV_CTLR_EL1);
1202 icv_ctlr_el1.EOImode = requested_icv_ctlr_el1.EOImode;
1203 icv_ctlr_el1.CBPR = requested_icv_ctlr_el1.CBPR;
1204 val = icv_ctlr_el1;
1205
1206 // Aliases
1207 // ICV_CTLR_EL1.CBPR aliases ICH_VMCR_EL2.VCBPR.
1208 // ICV_CTLR_EL1.EOImode aliases ICH_VMCR_EL2.VEOIM.
1209 ICH_VMCR_EL2 ich_vmcr_el2 =
1210 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1211 ich_vmcr_el2.VCBPR = icv_ctlr_el1.CBPR;
1212 ich_vmcr_el2.VEOIM = icv_ctlr_el1.EOImode;
1213 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1214 break;
1215 }
1216
1217 // Control Register EL3
1218 case MISCREG_ICC_MCTLR:
1219 case MISCREG_ICC_CTLR_EL3: {
1220 /*
1221 * ExtRange is RO.
1222 * RSS is RO.
1223 * nDS is RO.
1224 * A3V is RO.
1225 * SEIS is RO.
1226 * IDbits is RO.
1227 * PRIbits is RO.
1228 * PMHE is RAO/WI, priority-based routing is always used.
1229 */
1230 ICC_CTLR_EL3 requested_icc_ctlr_el3 = val;
1231
1232 // Aliases
1233 if (haveEL(EL3))
1234 {
1235 ICC_CTLR_EL1 icc_ctlr_el1_s =
1236 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S);
1237 ICC_CTLR_EL1 icc_ctlr_el1_ns =
1238 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS);
1239
1240 // ICC_CTLR_EL1(NS).EOImode is an alias of
1241 // ICC_CTLR_EL3.EOImode_EL1NS
1242 icc_ctlr_el1_ns.EOImode = requested_icc_ctlr_el3.EOImode_EL1NS;
1243 // ICC_CTLR_EL1(S).EOImode is an alias of
1244 // ICC_CTLR_EL3.EOImode_EL1S
1245 icc_ctlr_el1_s.EOImode = requested_icc_ctlr_el3.EOImode_EL1S;
1246 // ICC_CTLR_EL1(NS).CBPR is an alias of ICC_CTLR_EL3.CBPR_EL1NS
1247 icc_ctlr_el1_ns.CBPR = requested_icc_ctlr_el3.CBPR_EL1NS;
1248 // ICC_CTLR_EL1(S).CBPR is an alias of ICC_CTLR_EL3.CBPR_EL1S
1249 icc_ctlr_el1_s.CBPR = requested_icc_ctlr_el3.CBPR_EL1S;
1250
1251 isa->setMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S, icc_ctlr_el1_s);
1252 isa->setMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS,
1253 icc_ctlr_el1_ns);
1254 }
1255
1256 ICC_CTLR_EL3 icc_ctlr_el3 =
1257 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3);
1258
1259 icc_ctlr_el3.RM = requested_icc_ctlr_el3.RM;
1260 icc_ctlr_el3.EOImode_EL1NS = requested_icc_ctlr_el3.EOImode_EL1NS;
1261 icc_ctlr_el3.EOImode_EL1S = requested_icc_ctlr_el3.EOImode_EL1S;
1262 icc_ctlr_el3.EOImode_EL3 = requested_icc_ctlr_el3.EOImode_EL3;
1263 icc_ctlr_el3.CBPR_EL1NS = requested_icc_ctlr_el3.CBPR_EL1NS;
1264 icc_ctlr_el3.CBPR_EL1S = requested_icc_ctlr_el3.CBPR_EL1S;
1265
1266 val = icc_ctlr_el3;
1267 break;
1268 }
1269
1270 // Priority Mask Register
1271 case MISCREG_ICC_PMR:
1272 case MISCREG_ICC_PMR_EL1: {
1273 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) {
1274 return setMiscReg(MISCREG_ICV_PMR_EL1, val);
1275 }
1276
1277 val &= 0xff;
1278 SCR scr_el3 = isa->readMiscRegNoEffect(MISCREG_SCR_EL3);
1279
1280 if (haveEL(EL3) && !inSecureState() && (scr_el3.fiq)) {
1281 // Spec section 4.8.1
1282 // For Non-secure access to ICC_PMR_EL1 SCR_EL3.FIQ == 1:
1283 RegVal old_icc_pmr_el1 =
1284 isa->readMiscRegNoEffect(MISCREG_ICC_PMR_EL1);
1285
1286 if (!(old_icc_pmr_el1 & 0x80)) {
1287 // If the current priority mask value is in the range of
1288 // 0x00-0x7F then WI
1289 return;
1290 }
1291
1292 // If the current priority mask value is in the range of
1293 // 0x80-0xFF then a write access to ICC_PMR_EL1 succeeds,
1294 // based on the Non-secure read of the priority mask value
1295 // written to the register.
1296
1297 val = (val >> 1) | 0x80;
1298 }
1299
1300 val &= ~0U << (8 - PRIORITY_BITS);
1301 break;
1302 }
1303
1304 case MISCREG_ICV_PMR_EL1: { // Priority Mask Register
1305 ICH_VMCR_EL2 ich_vmcr_el2 =
1306 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1307 ich_vmcr_el2.VPMR = val & 0xff;
1308
1309 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1310 virtualUpdate();
1311 return;
1312 }
1313
1314 // Interrupt Group 0 Enable Register EL1
1315 case MISCREG_ICC_IGRPEN0:
1316 case MISCREG_ICC_IGRPEN0_EL1: {
1317 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) {
1318 return setMiscReg(MISCREG_ICV_IGRPEN0_EL1, val);
1319 }
1320
1321 break;
1322 }
1323
1324 // Virtual Interrupt Group 0 Enable register
1325 case MISCREG_ICV_IGRPEN0_EL1: {
1326 bool enable = val & 0x1;
1327 ICH_VMCR_EL2 ich_vmcr_el2 =
1328 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1329 ich_vmcr_el2.VENG0 = enable;
1330 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1331 virtualUpdate();
1332 return;
1333 }
1334
1335 // Interrupt Group 1 Enable register EL1
1336 case MISCREG_ICC_IGRPEN1:
1337 case MISCREG_ICC_IGRPEN1_EL1: {
1338 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
1339 return setMiscReg(MISCREG_ICV_IGRPEN1_EL1, val);
1340 }
1341
1342 if (haveEL(EL3)) {
1343 ICC_IGRPEN1_EL1 icc_igrpen1_el1 = val;
1344 ICC_IGRPEN1_EL3 icc_igrpen1_el3 =
1345 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL3);
1346
1347 if (inSecureState()) {
1348 // Enable is RW alias of ICC_IGRPEN1_EL3.EnableGrp1S
1349 icc_igrpen1_el3.EnableGrp1S = icc_igrpen1_el1.Enable;
1350 } else {
1351 // Enable is RW alias of ICC_IGRPEN1_EL3.EnableGrp1NS
1352 icc_igrpen1_el3.EnableGrp1NS = icc_igrpen1_el1.Enable;
1353 }
1354
1355 isa->setMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL3,
1356 icc_igrpen1_el3);
1357 }
1358
1359 break;
1360 }
1361
1362 // Virtual Interrupt Group 1 Enable register
1363 case MISCREG_ICV_IGRPEN1_EL1: {
1364 bool enable = val & 0x1;
1365 ICH_VMCR_EL2 ich_vmcr_el2 =
1366 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1367 ich_vmcr_el2.VENG1 = enable;
1368 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2);
1369 virtualUpdate();
1370 return;
1371 }
1372
1373 // Interrupt Group 1 Enable register
1374 case MISCREG_ICC_MGRPEN1:
1375 case MISCREG_ICC_IGRPEN1_EL3: {
1376 ICC_IGRPEN1_EL3 icc_igrpen1_el3 = val;
1377 ICC_IGRPEN1_EL1 icc_igrpen1_el1 =
1378 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1);
1379
1380 if (inSecureState()) {
1381 // ICC_IGRPEN1_EL1.Enable is RW alias of EnableGrp1S
1382 icc_igrpen1_el1.Enable = icc_igrpen1_el3.EnableGrp1S;
1383 } else {
1384 // ICC_IGRPEN1_EL1.Enable is RW alias of EnableGrp1NS
1385 icc_igrpen1_el1.Enable = icc_igrpen1_el3.EnableGrp1NS;
1386 }
1387
1388 isa->setMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1, icc_igrpen1_el1);
1389 break;
1390 }
1391
1392 // Software Generated Interrupt Group 0 Register
1393 case MISCREG_ICC_SGI0R:
1394 case MISCREG_ICC_SGI0R_EL1:
1395 generateSGI(val, Gicv3::G0S);
1396 break;
1397
1398 // Software Generated Interrupt Group 1 Register
1399 case MISCREG_ICC_SGI1R:
1400 case MISCREG_ICC_SGI1R_EL1: {
1401 Gicv3::GroupId group = inSecureState() ? Gicv3::G1S : Gicv3::G1NS;
1402
1403 generateSGI(val, group);
1404 break;
1405 }
1406
1407 // Alias Software Generated Interrupt Group 1 Register
1408 case MISCREG_ICC_ASGI1R:
1409 case MISCREG_ICC_ASGI1R_EL1: {
1410 Gicv3::GroupId group = inSecureState() ? Gicv3::G1NS : Gicv3::G1S;
1411
1412 generateSGI(val, group);
1413 break;
1414 }
1415
1416 // System Register Enable Register EL1
1417 case MISCREG_ICC_SRE:
1418 case MISCREG_ICC_SRE_EL1:
1419 // System Register Enable Register EL2
1420 case MISCREG_ICC_HSRE:
1421 case MISCREG_ICC_SRE_EL2:
1422 // System Register Enable Register EL3
1423 case MISCREG_ICC_MSRE:
1424 case MISCREG_ICC_SRE_EL3:
1425 // All bits are RAO/WI
1426 return;
1427
1428 // Hyp Control Register
1429 case MISCREG_ICH_HCR:
1430 case MISCREG_ICH_HCR_EL2: {
1431 ICH_HCR_EL2 requested_ich_hcr_el2 = val;
1432 ICH_HCR_EL2 ich_hcr_el2 =
1433 isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
1434
1435 if (requested_ich_hcr_el2.EOIcount >= ich_hcr_el2.EOIcount)
1436 {
1437 // EOIcount - Permitted behaviors are:
1438 // - Increment EOIcount.
1439 // - Leave EOIcount unchanged.
1440 ich_hcr_el2.EOIcount = requested_ich_hcr_el2.EOIcount;
1441 }
1442
1443 ich_hcr_el2.TDIR = requested_ich_hcr_el2.TDIR;
1444 ich_hcr_el2.TSEI = requested_ich_hcr_el2.TSEI;
1445 ich_hcr_el2.TALL1 = requested_ich_hcr_el2.TALL1;;
1446 ich_hcr_el2.TALL0 = requested_ich_hcr_el2.TALL0;;
1447 ich_hcr_el2.TC = requested_ich_hcr_el2.TC;
1448 ich_hcr_el2.VGrp1DIE = requested_ich_hcr_el2.VGrp1DIE;
1449 ich_hcr_el2.VGrp1EIE = requested_ich_hcr_el2.VGrp1EIE;
1450 ich_hcr_el2.VGrp0DIE = requested_ich_hcr_el2.VGrp0DIE;
1451 ich_hcr_el2.VGrp0EIE = requested_ich_hcr_el2.VGrp0EIE;
1452 ich_hcr_el2.NPIE = requested_ich_hcr_el2.NPIE;
1453 ich_hcr_el2.LRENPIE = requested_ich_hcr_el2.LRENPIE;
1454 ich_hcr_el2.UIE = requested_ich_hcr_el2.UIE;
1455 ich_hcr_el2.En = requested_ich_hcr_el2.En;
1456 val = ich_hcr_el2;
1457 do_virtual_update = true;
1458 break;
1459 }
1460
1461 // List Registers
1462 case MISCREG_ICH_LRC0 ... MISCREG_ICH_LRC15: {
1463 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 high half part)
1464 ICH_LRC requested_ich_lrc = val;
1465 ICH_LRC ich_lrc = isa->readMiscRegNoEffect(misc_reg);
1466
1467 ich_lrc.State = requested_ich_lrc.State;
1468 ich_lrc.HW = requested_ich_lrc.HW;
1469 ich_lrc.Group = requested_ich_lrc.Group;
1470
1471 // Priority, bits [23:16]
1472 // At least five bits must be implemented.
1473 // Unimplemented bits are RES0 and start from bit[16] up to bit[18].
1474 // We implement 5 bits.
1475 ich_lrc.Priority = (requested_ich_lrc.Priority & 0xf8) |
1476 (ich_lrc.Priority & 0x07);
1477
1478 // pINTID, bits [12:0]
1479 // When ICH_LR<n>.HW is 0 this field has the following meaning:
1480 // - Bits[12:10] : RES0.
1481 // - Bit[9] : EOI.
1482 // - Bits[8:0] : RES0.
1483 // When ICH_LR<n>.HW is 1:
1484 // - This field is only required to implement enough bits to hold a
1485 // valid value for the implemented INTID size. Any unused higher
1486 // order bits are RES0.
1487 if (requested_ich_lrc.HW == 0) {
1488 ich_lrc.EOI = requested_ich_lrc.EOI;
1489 } else {
1490 ich_lrc.pINTID = requested_ich_lrc.pINTID;
1491 }
1492
1493 val = ich_lrc;
1494 do_virtual_update = true;
1495 break;
1496 }
1497
1498 // List Registers
1499 case MISCREG_ICH_LR0 ... MISCREG_ICH_LR15: {
1500 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 low half part)
1501 RegVal old_val = isa->readMiscRegNoEffect(misc_reg);
1502 val = (old_val & 0xffffffff00000000) | (val & 0xffffffff);
1503 do_virtual_update = true;
1504 break;
1505 }
1506
1507 // List Registers
1508 case MISCREG_ICH_LR0_EL2 ... MISCREG_ICH_LR15_EL2: { // AArch64
1509 ICH_LR_EL2 requested_ich_lr_el2 = val;
1510 ICH_LR_EL2 ich_lr_el2 = isa->readMiscRegNoEffect(misc_reg);
1511
1512 ich_lr_el2.State = requested_ich_lr_el2.State;
1513 ich_lr_el2.HW = requested_ich_lr_el2.HW;
1514 ich_lr_el2.Group = requested_ich_lr_el2.Group;
1515
1516 // Priority, bits [55:48]
1517 // At least five bits must be implemented.
1518 // Unimplemented bits are RES0 and start from bit[48] up to bit[50].
1519 // We implement 5 bits.
1520 ich_lr_el2.Priority = (requested_ich_lr_el2.Priority & 0xf8) |
1521 (ich_lr_el2.Priority & 0x07);
1522
1523 // pINTID, bits [44:32]
1524 // When ICH_LR<n>_EL2.HW is 0 this field has the following meaning:
1525 // - Bits[44:42] : RES0.
1526 // - Bit[41] : EOI.
1527 // - Bits[40:32] : RES0.
1528 // When ICH_LR<n>_EL2.HW is 1:
1529 // - This field is only required to implement enough bits to hold a
1530 // valid value for the implemented INTID size. Any unused higher
1531 // order bits are RES0.
1532 if (requested_ich_lr_el2.HW == 0) {
1533 ich_lr_el2.EOI = requested_ich_lr_el2.EOI;
1534 } else {
1535 ich_lr_el2.pINTID = requested_ich_lr_el2.pINTID;
1536 }
1537
1538 // vINTID, bits [31:0]
1539 // It is IMPLEMENTATION DEFINED how many bits are implemented,
1540 // though at least 16 bits must be implemented.
1541 // Unimplemented bits are RES0.
1542 ich_lr_el2.vINTID = requested_ich_lr_el2.vINTID;
1543
1544 val = ich_lr_el2;
1545 do_virtual_update = true;
1546 break;
1547 }
1548
1549 // Virtual Machine Control Register
1550 case MISCREG_ICH_VMCR:
1551 case MISCREG_ICH_VMCR_EL2: {
1552 ICH_VMCR_EL2 requested_ich_vmcr_el2 = val;
1553 ICH_VMCR_EL2 ich_vmcr_el2 =
1554 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1555 ich_vmcr_el2.VPMR = requested_ich_vmcr_el2.VPMR;
1556 uint8_t min_vpr0 = 7 - VIRTUAL_PREEMPTION_BITS;
1557
1558 if (requested_ich_vmcr_el2.VBPR0 < min_vpr0) {
1559 ich_vmcr_el2.VBPR0 = min_vpr0;
1560 } else {
1561 ich_vmcr_el2.VBPR0 = requested_ich_vmcr_el2.VBPR0;
1562 }
1563
1564 uint8_t min_vpr1 = min_vpr0 + 1;
1565
1566 if (requested_ich_vmcr_el2.VBPR1 < min_vpr1) {
1567 ich_vmcr_el2.VBPR1 = min_vpr1;
1568 } else {
1569 ich_vmcr_el2.VBPR1 = requested_ich_vmcr_el2.VBPR1;
1570 }
1571
1572 ich_vmcr_el2.VEOIM = requested_ich_vmcr_el2.VEOIM;
1573 ich_vmcr_el2.VCBPR = requested_ich_vmcr_el2.VCBPR;
1574 ich_vmcr_el2.VENG1 = requested_ich_vmcr_el2.VENG1;
1575 ich_vmcr_el2.VENG0 = requested_ich_vmcr_el2.VENG0;
1576 val = ich_vmcr_el2;
1577 break;
1578 }
1579
1580 // Hyp Active Priorities Group 0 Registers
1581 case MISCREG_ICH_AP0R0:
1582 case MISCREG_ICH_AP0R0_EL2:
1583 break;
1584
1585 // only implemented if supporting 6 or more bits of priority
1586 case MISCREG_ICH_AP0R1:
1587 case MISCREG_ICH_AP0R1_EL2:
1588 // only implemented if supporting 7 or more bits of priority
1589 case MISCREG_ICH_AP0R2:
1590 case MISCREG_ICH_AP0R2_EL2:
1591 // only implemented if supporting 7 or more bits of priority
1592 case MISCREG_ICH_AP0R3:
1593 case MISCREG_ICH_AP0R3_EL2:
1594 // Unimplemented registers are RAZ/WI
1595 return;
1596
1597 // Hyp Active Priorities Group 1 Registers
1598 case MISCREG_ICH_AP1R0:
1599 case MISCREG_ICH_AP1R0_EL2:
1600 break;
1601
1602 // only implemented if supporting 6 or more bits of priority
1603 case MISCREG_ICH_AP1R1:
1604 case MISCREG_ICH_AP1R1_EL2:
1605 // only implemented if supporting 7 or more bits of priority
1606 case MISCREG_ICH_AP1R2:
1607 case MISCREG_ICH_AP1R2_EL2:
1608 // only implemented if supporting 7 or more bits of priority
1609 case MISCREG_ICH_AP1R3:
1610 case MISCREG_ICH_AP1R3_EL2:
1611 // Unimplemented registers are RAZ/WI
1612 return;
1613
1614 default:
1615 panic("Gicv3CPUInterface::setMiscReg(): unknown register %d (%s)",
1616 misc_reg, miscRegName[misc_reg]);
1617 }
1618
1619 isa->setMiscRegNoEffect(misc_reg, val);
1620
1621 if (do_virtual_update) {
1622 virtualUpdate();
1623 }
1624}
1625
|
1626int
1627Gicv3CPUInterface::virtualFindActive(uint32_t int_id) const
1628{
1629 for (uint32_t lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) {
1630 ICH_LR_EL2 ich_lr_el2 =
1631 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
1632
1633 if (((ich_lr_el2.State == ICH_LR_EL2_STATE_ACTIVE) ||
1634 (ich_lr_el2.State == ICH_LR_EL2_STATE_ACTIVE_PENDING)) &&
1635 (ich_lr_el2.vINTID == int_id)) {
1636 return lr_idx;
1637 }
1638 }
1639
1640 return -1;
1641}
1642
1643uint32_t
1644Gicv3CPUInterface::getHPPIR0() const
1645{
1646 if (hppi.prio == 0xff || !groupEnabled(hppi.group)) {
1647 return Gicv3::INTID_SPURIOUS;
1648 }
1649
1650 bool irq_is_secure = !distributor->DS && hppi.group != Gicv3::G1NS;
1651
1652 if ((hppi.group != Gicv3::G0S) && isEL3OrMon()) {
1653 // interrupt for the other state pending
1654 return irq_is_secure ? Gicv3::INTID_SECURE : Gicv3::INTID_NONSECURE;
1655 }
1656
1657 if ((hppi.group != Gicv3::G0S)) { // && !isEL3OrMon())
1658 return Gicv3::INTID_SPURIOUS;
1659 }
1660
1661 if (irq_is_secure && !inSecureState()) {
1662 // Secure interrupts not visible in Non-secure
1663 return Gicv3::INTID_SPURIOUS;
1664 }
1665
1666 return hppi.intid;
1667}
1668
1669uint32_t
1670Gicv3CPUInterface::getHPPIR1() const
1671{
1672 if (hppi.prio == 0xff || !groupEnabled(hppi.group)) {
1673 return Gicv3::INTID_SPURIOUS;
1674 }
1675
1676 ICC_CTLR_EL3 icc_ctlr_el3 = isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3);
1677 if ((currEL() == EL3) && icc_ctlr_el3.RM) {
1678 if (hppi.group == Gicv3::G0S) {
1679 return Gicv3::INTID_SECURE;
1680 } else if (hppi.group == Gicv3::G1NS) {
1681 return Gicv3::INTID_NONSECURE;
1682 }
1683 }
1684
1685 if (hppi.group == Gicv3::G0S) {
1686 return Gicv3::INTID_SPURIOUS;
1687 }
1688
1689 bool irq_is_secure = (distributor->DS == 0) && (hppi.group != Gicv3::G1NS);
1690
1691 if (irq_is_secure) {
1692 if (!inSecureState()) {
1693 // Secure interrupts not visible in Non-secure
1694 return Gicv3::INTID_SPURIOUS;
1695 }
1696 } else if (!isEL3OrMon() && inSecureState()) {
1697 // Group 1 non-secure interrupts not visible in Secure EL1
1698 return Gicv3::INTID_SPURIOUS;
1699 }
1700
1701 return hppi.intid;
1702}
1703
1704void
1705Gicv3CPUInterface::dropPriority(Gicv3::GroupId group)
1706{
1707 int apr_misc_reg;
1708 RegVal apr;
1709 apr_misc_reg = group == Gicv3::G0S ?
1710 MISCREG_ICC_AP0R0_EL1 : MISCREG_ICC_AP1R0_EL1;
1711 apr = isa->readMiscRegNoEffect(apr_misc_reg);
1712
1713 if (apr) {
1714 apr &= apr - 1;
1715 isa->setMiscRegNoEffect(apr_misc_reg, apr);
1716 }
1717
1718 update();
1719}
1720
1721uint8_t
1722Gicv3CPUInterface::virtualDropPriority()
1723{
1724 int apr_max = 1 << (VIRTUAL_PREEMPTION_BITS - 5);
1725
1726 for (int i = 0; i < apr_max; i++) {
1727 RegVal vapr0 = isa->readMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i);
1728 RegVal vapr1 = isa->readMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i);
1729
1730 if (!vapr0 && !vapr1) {
1731 continue;
1732 }
1733
1734 int vapr0_count = ctz32(vapr0);
1735 int vapr1_count = ctz32(vapr1);
1736
1737 if (vapr0_count <= vapr1_count) {
1738 vapr0 &= vapr0 - 1;
1739 isa->setMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i, vapr0);
1740 return (vapr0_count + i * 32) << (GIC_MIN_VBPR + 1);
1741 } else {
1742 vapr1 &= vapr1 - 1;
1743 isa->setMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i, vapr1);
1744 return (vapr1_count + i * 32) << (GIC_MIN_VBPR + 1);
1745 }
1746 }
1747
1748 return 0xff;
1749}
1750
1751void
1752Gicv3CPUInterface::generateSGI(RegVal val, Gicv3::GroupId group)
1753{
1754 uint8_t aff3 = bits(val, 55, 48);
1755 uint8_t aff2 = bits(val, 39, 32);
1756 uint8_t aff1 = bits(val, 23, 16);;
1757 uint16_t target_list = bits(val, 15, 0);
1758 uint32_t int_id = bits(val, 27, 24);
1759 bool irm = bits(val, 40, 40);
1760 uint8_t rs = bits(val, 47, 44);
1761
1762 bool ns = !inSecureState();
1763
1764 for (int i = 0; i < gic->getSystem()->numContexts(); i++) {
1765 Gicv3Redistributor * redistributor_i =
1766 gic->getRedistributor(i);
1767 uint32_t affinity_i = redistributor_i->getAffinity();
1768
1769 if (irm) {
1770 // Interrupts routed to all PEs in the system,
1771 // excluding "self"
1772 if (affinity_i == redistributor->getAffinity()) {
1773 continue;
1774 }
1775 } else {
1776 // Interrupts routed to the PEs specified by
1777 // Aff3.Aff2.Aff1.<target list>
1778 if ((affinity_i >> 8) !=
1779 ((aff3 << 16) | (aff2 << 8) | (aff1 << 0))) {
1780 continue;
1781 }
1782
1783 uint8_t aff0_i = bits(affinity_i, 7, 0);
1784
1785 if (!(aff0_i >= rs * 16 && aff0_i < (rs + 1) * 16 &&
1786 ((0x1 << (aff0_i - rs * 16)) & target_list))) {
1787 continue;
1788 }
1789 }
1790
1791 redistributor_i->sendSGI(int_id, group, ns);
1792 }
1793}
1794
1795void
1796Gicv3CPUInterface::activateIRQ(uint32_t int_id, Gicv3::GroupId group)
1797{
1798 // Update active priority registers.
1799 uint32_t prio = hppi.prio & 0xf8;
1800 int apr_bit = prio >> (8 - PRIORITY_BITS);
1801 int reg_bit = apr_bit % 32;
1802 int apr_idx = group == Gicv3::G0S ?
1803 MISCREG_ICC_AP0R0_EL1 : MISCREG_ICC_AP1R0_EL1;
1804 RegVal apr = isa->readMiscRegNoEffect(apr_idx);
1805 apr |= (1 << reg_bit);
1806 isa->setMiscRegNoEffect(apr_idx, apr);
1807
1808 // Move interrupt state from pending to active.
1809 if (int_id < Gicv3::SGI_MAX + Gicv3::PPI_MAX) {
1810 // SGI or PPI, redistributor
1811 redistributor->activateIRQ(int_id);
1812 } else if (int_id < Gicv3::INTID_SECURE) {
1813 // SPI, distributor
1814 distributor->activateIRQ(int_id);
1815 } else if (int_id >= Gicv3Redistributor::SMALLEST_LPI_ID) {
1816 // LPI, Redistributor
1817 redistributor->setClrLPI(int_id, false);
1818 }
1819
1820 // By setting the priority to 0xff we are effectively
1821 // making the int_id not pending anymore at the cpu
1822 // interface.
1823 hppi.prio = 0xff;
1824 updateDistributor();
1825}
1826
1827void
1828Gicv3CPUInterface::virtualActivateIRQ(uint32_t lr_idx)
1829{
1830 // Update active priority registers.
1831 ICH_LR_EL2 ich_lr_el = isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 +
1832 lr_idx);
1833 Gicv3::GroupId group = ich_lr_el.Group ? Gicv3::G1NS : Gicv3::G0S;
1834 uint8_t prio = ich_lr_el.Priority & 0xf8;
1835 int apr_bit = prio >> (8 - VIRTUAL_PREEMPTION_BITS);
1836 int reg_no = apr_bit / 32;
1837 int reg_bit = apr_bit % 32;
1838 int apr_idx = group == Gicv3::G0S ?
1839 MISCREG_ICH_AP0R0_EL2 + reg_no : MISCREG_ICH_AP1R0_EL2 + reg_no;
1840 RegVal apr = isa->readMiscRegNoEffect(apr_idx);
1841 apr |= (1 << reg_bit);
1842 isa->setMiscRegNoEffect(apr_idx, apr);
1843 // Move interrupt state from pending to active.
1844 ich_lr_el.State = ICH_LR_EL2_STATE_ACTIVE;
1845 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx, ich_lr_el);
1846}
1847
1848void
1849Gicv3CPUInterface::deactivateIRQ(uint32_t int_id, Gicv3::GroupId group)
1850{
1851 if (int_id < Gicv3::SGI_MAX + Gicv3::PPI_MAX) {
1852 // SGI or PPI, redistributor
1853 redistributor->deactivateIRQ(int_id);
1854 } else if (int_id < Gicv3::INTID_SECURE) {
1855 // SPI, distributor
1856 distributor->deactivateIRQ(int_id);
1857 }
1858
1859 updateDistributor();
1860}
1861
1862void
1863Gicv3CPUInterface::virtualDeactivateIRQ(int lr_idx)
1864{
1865 ICH_LR_EL2 ich_lr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 +
1866 lr_idx);
1867
1868 if (ich_lr_el2.HW) {
1869 // Deactivate the associated physical interrupt
1870 if (ich_lr_el2.pINTID < Gicv3::INTID_SECURE) {
1871 Gicv3::GroupId group = ich_lr_el2.pINTID >= 32 ?
1872 distributor->getIntGroup(ich_lr_el2.pINTID) :
1873 redistributor->getIntGroup(ich_lr_el2.pINTID);
1874 deactivateIRQ(ich_lr_el2.pINTID, group);
1875 }
1876 }
1877
1878 // Remove the active bit
1879 ich_lr_el2.State = ich_lr_el2.State & ~ICH_LR_EL2_STATE_ACTIVE;
1880 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx, ich_lr_el2);
1881}
1882
1883/*
1884 * Returns the priority group field for the current BPR value for the group.
1885 * GroupBits() Pseudocode from spec.
1886 */
1887uint32_t
1888Gicv3CPUInterface::groupPriorityMask(Gicv3::GroupId group)
1889{
1890 ICC_CTLR_EL1 icc_ctlr_el1_s =
1891 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S);
1892 ICC_CTLR_EL1 icc_ctlr_el1_ns =
1893 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS);
1894
1895 if ((group == Gicv3::G1S && icc_ctlr_el1_s.CBPR) ||
1896 (group == Gicv3::G1NS && icc_ctlr_el1_ns.CBPR)) {
1897 group = Gicv3::G0S;
1898 }
1899
1900 int bpr;
1901
1902 if (group == Gicv3::G0S) {
1903 bpr = readMiscReg(MISCREG_ICC_BPR0_EL1) & 0x7;
1904 } else if (group == Gicv3::G1S) {
1905 bpr = bpr1(Gicv3::G1S) & 0x7;
1906 } else {
1907 bpr = bpr1(Gicv3::G1NS) & 0x7;
1908 }
1909
1910 if (group == Gicv3::G1NS) {
1911 assert(bpr > 0);
1912 bpr--;
1913 }
1914
1915 return ~0U << (bpr + 1);
1916}
1917
1918uint32_t
1919Gicv3CPUInterface::virtualGroupPriorityMask(Gicv3::GroupId group) const
1920{
1921 ICH_VMCR_EL2 ich_vmcr_el2 =
1922 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1923
1924 if ((group == Gicv3::G1NS) && ich_vmcr_el2.VCBPR) {
1925 group = Gicv3::G0S;
1926 }
1927
1928 int bpr;
1929
1930 if (group == Gicv3::G0S) {
1931 bpr = ich_vmcr_el2.VBPR0;
1932 } else {
1933 bpr = ich_vmcr_el2.VBPR1;
1934 }
1935
1936 if (group == Gicv3::G1NS) {
1937 assert(bpr > 0);
1938 bpr--;
1939 }
1940
1941 return ~0U << (bpr + 1);
1942}
1943
1944bool
1945Gicv3CPUInterface::isEOISplitMode() const
1946{
1947 if (isEL3OrMon()) {
1948 ICC_CTLR_EL3 icc_ctlr_el3 =
1949 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3);
1950 return icc_ctlr_el3.EOImode_EL3;
1951 } else {
1952 ICC_CTLR_EL1 icc_ctlr_el1 =
1953 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1);
1954 return icc_ctlr_el1.EOImode;
1955 }
1956}
1957
1958bool
1959Gicv3CPUInterface::virtualIsEOISplitMode() const
1960{
1961 ICH_VMCR_EL2 ich_vmcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1962 return ich_vmcr_el2.VEOIM;
1963}
1964
1965int
1966Gicv3CPUInterface::highestActiveGroup() const
1967{
1968 int g0_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP0R0_EL1));
1969 int gq_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_S));
1970 int g1nz_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_NS));
1971
1972 if (g1nz_ctz < g0_ctz && g1nz_ctz < gq_ctz) {
1973 return Gicv3::G1NS;
1974 }
1975
1976 if (gq_ctz < g0_ctz) {
1977 return Gicv3::G1S;
1978 }
1979
1980 if (g0_ctz < 32) {
1981 return Gicv3::G0S;
1982 }
1983
1984 return -1;
1985}
1986
1987void
1988Gicv3CPUInterface::updateDistributor()
1989{
1990 distributor->update();
1991}
1992
1993void
1994Gicv3CPUInterface::update()
1995{
1996 bool signal_IRQ = false;
1997 bool signal_FIQ = false;
1998
1999 if (hppi.group == Gicv3::G1S && !haveEL(EL3)) {
2000 /*
2001 * Secure enabled GIC sending a G1S IRQ to a secure disabled
2002 * CPU -> send G0 IRQ
2003 */
2004 hppi.group = Gicv3::G0S;
2005 }
2006
2007 if (hppiCanPreempt()) {
2008 ArmISA::InterruptTypes int_type = intSignalType(hppi.group);
2009 DPRINTF(GIC, "Gicv3CPUInterface::update(): "
2010 "posting int as %d!\n", int_type);
2011 int_type == ArmISA::INT_IRQ ? signal_IRQ = true : signal_FIQ = true;
2012 }
2013
2014 if (signal_IRQ) {
2015 gic->postInt(cpuId, ArmISA::INT_IRQ);
2016 } else {
2017 gic->deassertInt(cpuId, ArmISA::INT_IRQ);
2018 }
2019
2020 if (signal_FIQ) {
2021 gic->postInt(cpuId, ArmISA::INT_FIQ);
2022 } else {
2023 gic->deassertInt(cpuId, ArmISA::INT_FIQ);
2024 }
2025}
2026
2027void
2028Gicv3CPUInterface::virtualUpdate()
2029{
2030 bool signal_IRQ = false;
2031 bool signal_FIQ = false;
2032 int lr_idx = getHPPVILR();
2033
2034 if (lr_idx >= 0) {
2035 ICH_LR_EL2 ich_lr_el2 =
2036 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
2037
2038 if (hppviCanPreempt(lr_idx)) {
2039 if (ich_lr_el2.Group) {
2040 signal_IRQ = true;
2041 } else {
2042 signal_FIQ = true;
2043 }
2044 }
2045 }
2046
2047 ICH_HCR_EL2 ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
2048
2049 if (ich_hcr_el2.En) {
2050 if (maintenanceInterruptStatus()) {
2051 maintenanceInterrupt->raise();
2052 }
2053 }
2054
2055 if (signal_IRQ) {
2056 DPRINTF(GIC, "Gicv3CPUInterface::virtualUpdate(): "
2057 "posting int as %d!\n", ArmISA::INT_VIRT_IRQ);
2058 gic->postInt(cpuId, ArmISA::INT_VIRT_IRQ);
2059 } else {
2060 gic->deassertInt(cpuId, ArmISA::INT_VIRT_IRQ);
2061 }
2062
2063 if (signal_FIQ) {
2064 DPRINTF(GIC, "Gicv3CPUInterface::virtualUpdate(): "
2065 "posting int as %d!\n", ArmISA::INT_VIRT_FIQ);
2066 gic->postInt(cpuId, ArmISA::INT_VIRT_FIQ);
2067 } else {
2068 gic->deassertInt(cpuId, ArmISA::INT_VIRT_FIQ);
2069 }
2070}
2071
2072// Returns the index of the LR with the HPPI
2073int
2074Gicv3CPUInterface::getHPPVILR() const
2075{
2076 int idx = -1;
2077 ICH_VMCR_EL2 ich_vmcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
2078
2079 if (!ich_vmcr_el2.VENG0 && !ich_vmcr_el2.VENG1) {
2080 // VG0 and VG1 disabled...
2081 return idx;
2082 }
2083
2084 uint8_t highest_prio = 0xff;
2085
2086 for (int i = 0; i < 16; i++) {
2087 ICH_LR_EL2 ich_lr_el2 =
2088 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + i);
2089
2090 if (ich_lr_el2.State != Gicv3::INT_PENDING) {
2091 continue;
2092 }
2093
2094 if (ich_lr_el2.Group) {
2095 // VG1
2096 if (!ich_vmcr_el2.VENG1) {
2097 continue;
2098 }
2099 } else {
2100 // VG0
2101 if (!ich_vmcr_el2.VENG0) {
2102 continue;
2103 }
2104 }
2105
2106 uint8_t prio = ich_lr_el2.Priority;
2107
2108 if (prio < highest_prio) {
2109 highest_prio = prio;
2110 idx = i;
2111 }
2112 }
2113
2114 return idx;
2115}
2116
2117bool
2118Gicv3CPUInterface::hppviCanPreempt(int lr_idx) const
2119{
2120 ICH_HCR_EL2 ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
2121 if (!ich_hcr_el2.En) {
2122 // virtual interface is disabled
2123 return false;
2124 }
2125
2126 ICH_LR_EL2 ich_lr_el2 =
2127 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
2128 uint8_t prio = ich_lr_el2.Priority;
2129 uint8_t vpmr =
2130 bits(isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2), 31, 24);
2131
2132 if (prio >= vpmr) {
2133 // prioriry masked
2134 return false;
2135 }
2136
2137 uint8_t rprio = virtualHighestActivePriority();
2138
2139 if (rprio == 0xff) {
2140 return true;
2141 }
2142
2143 Gicv3::GroupId group = ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S;
2144 uint32_t prio_mask = virtualGroupPriorityMask(group);
2145
2146 if ((prio & prio_mask) < (rprio & prio_mask)) {
2147 return true;
2148 }
2149
2150 return false;
2151}
2152
2153uint8_t
2154Gicv3CPUInterface::virtualHighestActivePriority() const
2155{
2156 uint8_t num_aprs = 1 << (VIRTUAL_PRIORITY_BITS - 5);
2157
2158 for (int i = 0; i < num_aprs; i++) {
2159 RegVal vapr =
2160 isa->readMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i) |
2161 isa->readMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i);
2162
2163 if (!vapr) {
2164 continue;
2165 }
2166
2167 return (i * 32 + ctz32(vapr)) << (GIC_MIN_VBPR + 1);
2168 }
2169
2170 // no active interrups, return idle priority
2171 return 0xff;
2172}
2173
2174void
2175Gicv3CPUInterface::virtualIncrementEOICount()
2176{
2177 // Increment the EOICOUNT field in ICH_HCR_EL2
2178 RegVal ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
2179 uint32_t EOI_cout = bits(ich_hcr_el2, 31, 27);
2180 EOI_cout++;
2181 ich_hcr_el2 = insertBits(ich_hcr_el2, 31, 27, EOI_cout);
2182 isa->setMiscRegNoEffect(MISCREG_ICH_HCR_EL2, ich_hcr_el2);
2183}
2184
2185// spec section 4.6.2
2186ArmISA::InterruptTypes
2187Gicv3CPUInterface::intSignalType(Gicv3::GroupId group) const
2188{
2189 bool is_fiq = false;
2190
2191 switch (group) {
2192 case Gicv3::G0S:
2193 is_fiq = true;
2194 break;
2195
2196 case Gicv3::G1S:
2197 is_fiq = (distributor->DS == 0) &&
2198 (!inSecureState() || ((currEL() == EL3) && isAA64()));
2199 break;
2200
2201 case Gicv3::G1NS:
2202 is_fiq = (distributor->DS == 0) && inSecureState();
2203 break;
2204
2205 default:
2206 panic("Gicv3CPUInterface::intSignalType(): invalid group!");
2207 }
2208
2209 if (is_fiq) {
2210 return ArmISA::INT_FIQ;
2211 } else {
2212 return ArmISA::INT_IRQ;
2213 }
2214}
2215
2216bool
2217Gicv3CPUInterface::hppiCanPreempt()
2218{
2219 if (hppi.prio == 0xff) {
2220 // there is no pending interrupt
2221 return false;
2222 }
2223
2224 if (!groupEnabled(hppi.group)) {
2225 // group disabled at CPU interface
2226 return false;
2227 }
2228
2229 if (hppi.prio >= isa->readMiscRegNoEffect(MISCREG_ICC_PMR_EL1)) {
2230 // priority masked
2231 return false;
2232 }
2233
2234 uint8_t rprio = highestActivePriority();
2235
2236 if (rprio == 0xff) {
2237 return true;
2238 }
2239
2240 uint32_t prio_mask = groupPriorityMask(hppi.group);
2241
2242 if ((hppi.prio & prio_mask) < (rprio & prio_mask)) {
2243 return true;
2244 }
2245
2246 return false;
2247}
2248
2249uint8_t
2250Gicv3CPUInterface::highestActivePriority() const
2251{
2252 uint32_t apr = isa->readMiscRegNoEffect(MISCREG_ICC_AP0R0_EL1) |
2253 isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_NS) |
2254 isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_S);
2255
2256 if (apr) {
2257 return ctz32(apr) << (GIC_MIN_BPR + 1);
2258 }
2259
2260 // no active interrups, return idle priority
2261 return 0xff;
2262}
2263
2264bool
2265Gicv3CPUInterface::groupEnabled(Gicv3::GroupId group) const
2266{
2267 switch (group) {
2268 case Gicv3::G0S: {
2269 ICC_IGRPEN0_EL1 icc_igrpen0_el1 =
2270 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN0_EL1);
2271 return icc_igrpen0_el1.Enable && distributor->EnableGrp0;
2272 }
2273
2274 case Gicv3::G1S: {
2275 ICC_IGRPEN1_EL1 icc_igrpen1_el1_s =
2276 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1_S);
2277 return icc_igrpen1_el1_s.Enable && distributor->EnableGrp1S;
2278 }
2279
2280 case Gicv3::G1NS: {
2281 ICC_IGRPEN1_EL1 icc_igrpen1_el1_ns =
2282 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1_NS);
2283 return icc_igrpen1_el1_ns.Enable && distributor->EnableGrp1NS;
2284 }
2285
2286 default:
2287 panic("Gicv3CPUInterface::groupEnable(): invalid group!\n");
2288 }
2289}
2290
2291bool
2292Gicv3CPUInterface::inSecureState() const
2293{
2294 if (!gic->getSystem()->haveSecurity()) {
2295 return false;
2296 }
2297
2298 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR);
2299 SCR scr = isa->readMiscRegNoEffect(MISCREG_SCR);
2300 return ArmISA::inSecureState(scr, cpsr);
2301}
2302
2303int
2304Gicv3CPUInterface::currEL() const
2305{
2306 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR);
2307 bool is_64 = opModeIs64((OperatingMode)(uint8_t) cpsr.mode);
2308
2309 if (is_64) {
2310 return (ExceptionLevel)(uint8_t) cpsr.el;
2311 } else {
2312 switch (cpsr.mode) {
2313 case MODE_USER:
2314 return 0;
2315
2316 case MODE_HYP:
2317 return 2;
2318
2319 case MODE_MON:
2320 return 3;
2321
2322 default:
2323 return 1;
2324 }
2325 }
2326}
2327
2328bool
2329Gicv3CPUInterface::haveEL(ExceptionLevel el) const
2330{
2331 switch (el) {
2332 case EL0:
2333 case EL1:
2334 return true;
2335
2336 case EL2:
2337 return gic->getSystem()->haveVirtualization();
2338
2339 case EL3:
2340 return gic->getSystem()->haveSecurity();
2341
2342 default:
2343 warn("Unimplemented Exception Level\n");
2344 return false;
2345 }
2346}
2347
2348bool
2349Gicv3CPUInterface::isSecureBelowEL3() const
2350{
2351 SCR scr = isa->readMiscRegNoEffect(MISCREG_SCR_EL3);
2352 return haveEL(EL3) && scr.ns == 0;
2353}
2354
2355bool
2356Gicv3CPUInterface::isAA64() const
2357{
2358 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR);
2359 return opModeIs64((OperatingMode)(uint8_t) cpsr.mode);
2360}
2361
2362bool
2363Gicv3CPUInterface::isEL3OrMon() const
2364{
2365 if (haveEL(EL3)) {
2366 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR);
2367 bool is_64 = opModeIs64((OperatingMode)(uint8_t) cpsr.mode);
2368
2369 if (is_64 && (cpsr.el == EL3)) {
2370 return true;
2371 } else if (!is_64 && (cpsr.mode == MODE_MON)) {
2372 return true;
2373 }
2374 }
2375
2376 return false;
2377}
2378
2379// Computes ICH_EISR_EL2
2380uint64_t
2381Gicv3CPUInterface::eoiMaintenanceInterruptStatus() const
2382{
2383 // ICH_EISR_EL2
2384 // Bits [63:16] - RES0
2385 // Status<n>, bit [n], for n = 0 to 15
2386 // EOI maintenance interrupt status bit for List register <n>:
2387 // 0 if List register <n>, ICH_LR<n>_EL2, does not have an EOI
2388 // maintenance interrupt.
2389 // 1 if List register <n>, ICH_LR<n>_EL2, has an EOI maintenance
2390 // interrupt that has not been handled.
2391 //
2392 // For any ICH_LR<n>_EL2, the corresponding status bit is set to 1 if all
2393 // of the following are true:
2394 // - ICH_LR<n>_EL2.State is 0b00 (ICH_LR_EL2_STATE_INVALID).
2395 // - ICH_LR<n>_EL2.HW is 0.
2396 // - ICH_LR<n>_EL2.EOI (bit [41]) is 1.
2397
2398 uint64_t value = 0;
2399
2400 for (int lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) {
2401 ICH_LR_EL2 ich_lr_el2 =
2402 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
2403
2404 if ((ich_lr_el2.State == ICH_LR_EL2_STATE_INVALID) &&
2405 !ich_lr_el2.HW && ich_lr_el2.EOI) {
2406 value |= (1 << lr_idx);
2407 }
2408 }
2409
2410 return value;
2411}
2412
2413Gicv3CPUInterface::ICH_MISR_EL2
2414Gicv3CPUInterface::maintenanceInterruptStatus() const
2415{
2416 // Comments are copied from SPEC section 9.4.7 (ID012119)
2417 ICH_MISR_EL2 ich_misr_el2 = 0;
2418 ICH_HCR_EL2 ich_hcr_el2 =
2419 isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
2420 ICH_VMCR_EL2 ich_vmcr_el2 =
2421 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
2422
2423 // End Of Interrupt. [bit 0]
2424 // This maintenance interrupt is asserted when at least one bit in
2425 // ICH_EISR_EL2 is 1.
2426
2427 if (eoiMaintenanceInterruptStatus()) {
2428 ich_misr_el2.EOI = 1;
2429 }
2430
2431 // Underflow. [bit 1]
2432 // This maintenance interrupt is asserted when ICH_HCR_EL2.UIE==1 and
2433 // zero or one of the List register entries are marked as a valid
2434 // interrupt, that is, if the corresponding ICH_LR<n>_EL2.State bits
2435 // do not equal 0x0.
2436 uint32_t num_valid_interrupts = 0;
2437 uint32_t num_pending_interrupts = 0;
2438
2439 for (int lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) {
2440 ICH_LR_EL2 ich_lr_el2 =
2441 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
2442
2443 if (ich_lr_el2.State != ICH_LR_EL2_STATE_INVALID) {
2444 num_valid_interrupts++;
2445 }
2446
2447 if (ich_lr_el2.State == ICH_LR_EL2_STATE_PENDING) {
2448 num_pending_interrupts++;
2449 }
2450 }
2451
2452 if (ich_hcr_el2.UIE && (num_valid_interrupts < 2)) {
2453 ich_misr_el2.U = 1;
2454 }
2455
2456 // List Register Entry Not Present. [bit 2]
2457 // This maintenance interrupt is asserted when ICH_HCR_EL2.LRENPIE==1
2458 // and ICH_HCR_EL2.EOIcount is non-zero.
2459 if (ich_hcr_el2.LRENPIE && ich_hcr_el2.EOIcount) {
2460 ich_misr_el2.LRENP = 1;
2461 }
2462
2463 // No Pending. [bit 3]
2464 // This maintenance interrupt is asserted when ICH_HCR_EL2.NPIE==1 and
2465 // no List register is in pending state.
2466 if (ich_hcr_el2.NPIE && (num_pending_interrupts == 0)) {
2467 ich_misr_el2.NP = 1;
2468 }
2469
2470 // vPE Group 0 Enabled. [bit 4]
2471 // This maintenance interrupt is asserted when
2472 // ICH_HCR_EL2.VGrp0EIE==1 and ICH_VMCR_EL2.VENG0==1.
2473 if (ich_hcr_el2.VGrp0EIE && ich_vmcr_el2.VENG0) {
2474 ich_misr_el2.VGrp0E = 1;
2475 }
2476
2477 // vPE Group 0 Disabled. [bit 5]
2478 // This maintenance interrupt is asserted when
2479 // ICH_HCR_EL2.VGrp0DIE==1 and ICH_VMCR_EL2.VENG0==0.
2480 if (ich_hcr_el2.VGrp0DIE && !ich_vmcr_el2.VENG0) {
2481 ich_misr_el2.VGrp0D = 1;
2482 }
2483
2484 // vPE Group 1 Enabled. [bit 6]
2485 // This maintenance interrupt is asserted when
2486 // ICH_HCR_EL2.VGrp1EIE==1 and ICH_VMCR_EL2.VENG1==is 1.
2487 if (ich_hcr_el2.VGrp1EIE && ich_vmcr_el2.VENG1) {
2488 ich_misr_el2.VGrp1E = 1;
2489 }
2490
2491 // vPE Group 1 Disabled. [bit 7]
2492 // This maintenance interrupt is asserted when
2493 // ICH_HCR_EL2.VGrp1DIE==1 and ICH_VMCR_EL2.VENG1==is 0.
2494 if (ich_hcr_el2.VGrp1DIE && !ich_vmcr_el2.VENG1) {
2495 ich_misr_el2.VGrp1D = 1;
2496 }
2497
2498 return ich_misr_el2;
2499}
2500
2501RegVal
2502Gicv3CPUInterface::bpr1(Gicv3::GroupId group)
2503{
2504 bool hcr_imo = getHCREL2IMO();
2505 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
2506 return readMiscReg(MISCREG_ICV_BPR1_EL1);
2507 }
2508
2509 RegVal bpr = 0;
2510
2511 if (group == Gicv3::G1S) {
2512 ICC_CTLR_EL1 icc_ctlr_el1_s =
2513 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S);
2514
2515 if (!isEL3OrMon() && icc_ctlr_el1_s.CBPR) {
2516 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR0_EL1);
2517 } else {
2518 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR1_EL1_S);
2519 bpr = bpr > GIC_MIN_BPR ? bpr : GIC_MIN_BPR;
2520 }
2521 } else if (group == Gicv3::G1NS) {
2522 ICC_CTLR_EL1 icc_ctlr_el1_ns =
2523 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS);
2524
2525 // Check if EL3 is implemented and this is a non secure accesses at
2526 // EL1 and EL2
2527 if (haveEL(EL3) && !isEL3OrMon() && icc_ctlr_el1_ns.CBPR) {
2528 // Reads return BPR0 + 1 saturated to 7, WI
2529 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR0_EL1) + 1;
2530 bpr = bpr < 7 ? bpr : 7;
2531 } else {
2532 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR1_EL1_NS);
2533 bpr = bpr > GIC_MIN_BPR_NS ? bpr : GIC_MIN_BPR_NS;
2534 }
2535 } else {
2536 panic("Should be used with G1S and G1NS only\n");
2537 }
2538
2539 return bpr;
2540}
2541
2542void
2543Gicv3CPUInterface::serialize(CheckpointOut & cp) const
2544{
2545 SERIALIZE_SCALAR(hppi.intid);
2546 SERIALIZE_SCALAR(hppi.prio);
2547 SERIALIZE_ENUM(hppi.group);
2548}
2549
2550void
2551Gicv3CPUInterface::unserialize(CheckpointIn & cp)
2552{
2553 UNSERIALIZE_SCALAR(hppi.intid);
2554 UNSERIALIZE_SCALAR(hppi.prio);
2555 UNSERIALIZE_ENUM(hppi.group);
2556}
| 1640int
1641Gicv3CPUInterface::virtualFindActive(uint32_t int_id) const
1642{
1643 for (uint32_t lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) {
1644 ICH_LR_EL2 ich_lr_el2 =
1645 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
1646
1647 if (((ich_lr_el2.State == ICH_LR_EL2_STATE_ACTIVE) ||
1648 (ich_lr_el2.State == ICH_LR_EL2_STATE_ACTIVE_PENDING)) &&
1649 (ich_lr_el2.vINTID == int_id)) {
1650 return lr_idx;
1651 }
1652 }
1653
1654 return -1;
1655}
1656
1657uint32_t
1658Gicv3CPUInterface::getHPPIR0() const
1659{
1660 if (hppi.prio == 0xff || !groupEnabled(hppi.group)) {
1661 return Gicv3::INTID_SPURIOUS;
1662 }
1663
1664 bool irq_is_secure = !distributor->DS && hppi.group != Gicv3::G1NS;
1665
1666 if ((hppi.group != Gicv3::G0S) && isEL3OrMon()) {
1667 // interrupt for the other state pending
1668 return irq_is_secure ? Gicv3::INTID_SECURE : Gicv3::INTID_NONSECURE;
1669 }
1670
1671 if ((hppi.group != Gicv3::G0S)) { // && !isEL3OrMon())
1672 return Gicv3::INTID_SPURIOUS;
1673 }
1674
1675 if (irq_is_secure && !inSecureState()) {
1676 // Secure interrupts not visible in Non-secure
1677 return Gicv3::INTID_SPURIOUS;
1678 }
1679
1680 return hppi.intid;
1681}
1682
1683uint32_t
1684Gicv3CPUInterface::getHPPIR1() const
1685{
1686 if (hppi.prio == 0xff || !groupEnabled(hppi.group)) {
1687 return Gicv3::INTID_SPURIOUS;
1688 }
1689
1690 ICC_CTLR_EL3 icc_ctlr_el3 = isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3);
1691 if ((currEL() == EL3) && icc_ctlr_el3.RM) {
1692 if (hppi.group == Gicv3::G0S) {
1693 return Gicv3::INTID_SECURE;
1694 } else if (hppi.group == Gicv3::G1NS) {
1695 return Gicv3::INTID_NONSECURE;
1696 }
1697 }
1698
1699 if (hppi.group == Gicv3::G0S) {
1700 return Gicv3::INTID_SPURIOUS;
1701 }
1702
1703 bool irq_is_secure = (distributor->DS == 0) && (hppi.group != Gicv3::G1NS);
1704
1705 if (irq_is_secure) {
1706 if (!inSecureState()) {
1707 // Secure interrupts not visible in Non-secure
1708 return Gicv3::INTID_SPURIOUS;
1709 }
1710 } else if (!isEL3OrMon() && inSecureState()) {
1711 // Group 1 non-secure interrupts not visible in Secure EL1
1712 return Gicv3::INTID_SPURIOUS;
1713 }
1714
1715 return hppi.intid;
1716}
1717
1718void
1719Gicv3CPUInterface::dropPriority(Gicv3::GroupId group)
1720{
1721 int apr_misc_reg;
1722 RegVal apr;
1723 apr_misc_reg = group == Gicv3::G0S ?
1724 MISCREG_ICC_AP0R0_EL1 : MISCREG_ICC_AP1R0_EL1;
1725 apr = isa->readMiscRegNoEffect(apr_misc_reg);
1726
1727 if (apr) {
1728 apr &= apr - 1;
1729 isa->setMiscRegNoEffect(apr_misc_reg, apr);
1730 }
1731
1732 update();
1733}
1734
1735uint8_t
1736Gicv3CPUInterface::virtualDropPriority()
1737{
1738 int apr_max = 1 << (VIRTUAL_PREEMPTION_BITS - 5);
1739
1740 for (int i = 0; i < apr_max; i++) {
1741 RegVal vapr0 = isa->readMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i);
1742 RegVal vapr1 = isa->readMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i);
1743
1744 if (!vapr0 && !vapr1) {
1745 continue;
1746 }
1747
1748 int vapr0_count = ctz32(vapr0);
1749 int vapr1_count = ctz32(vapr1);
1750
1751 if (vapr0_count <= vapr1_count) {
1752 vapr0 &= vapr0 - 1;
1753 isa->setMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i, vapr0);
1754 return (vapr0_count + i * 32) << (GIC_MIN_VBPR + 1);
1755 } else {
1756 vapr1 &= vapr1 - 1;
1757 isa->setMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i, vapr1);
1758 return (vapr1_count + i * 32) << (GIC_MIN_VBPR + 1);
1759 }
1760 }
1761
1762 return 0xff;
1763}
1764
1765void
1766Gicv3CPUInterface::generateSGI(RegVal val, Gicv3::GroupId group)
1767{
1768 uint8_t aff3 = bits(val, 55, 48);
1769 uint8_t aff2 = bits(val, 39, 32);
1770 uint8_t aff1 = bits(val, 23, 16);;
1771 uint16_t target_list = bits(val, 15, 0);
1772 uint32_t int_id = bits(val, 27, 24);
1773 bool irm = bits(val, 40, 40);
1774 uint8_t rs = bits(val, 47, 44);
1775
1776 bool ns = !inSecureState();
1777
1778 for (int i = 0; i < gic->getSystem()->numContexts(); i++) {
1779 Gicv3Redistributor * redistributor_i =
1780 gic->getRedistributor(i);
1781 uint32_t affinity_i = redistributor_i->getAffinity();
1782
1783 if (irm) {
1784 // Interrupts routed to all PEs in the system,
1785 // excluding "self"
1786 if (affinity_i == redistributor->getAffinity()) {
1787 continue;
1788 }
1789 } else {
1790 // Interrupts routed to the PEs specified by
1791 // Aff3.Aff2.Aff1.<target list>
1792 if ((affinity_i >> 8) !=
1793 ((aff3 << 16) | (aff2 << 8) | (aff1 << 0))) {
1794 continue;
1795 }
1796
1797 uint8_t aff0_i = bits(affinity_i, 7, 0);
1798
1799 if (!(aff0_i >= rs * 16 && aff0_i < (rs + 1) * 16 &&
1800 ((0x1 << (aff0_i - rs * 16)) & target_list))) {
1801 continue;
1802 }
1803 }
1804
1805 redistributor_i->sendSGI(int_id, group, ns);
1806 }
1807}
1808
1809void
1810Gicv3CPUInterface::activateIRQ(uint32_t int_id, Gicv3::GroupId group)
1811{
1812 // Update active priority registers.
1813 uint32_t prio = hppi.prio & 0xf8;
1814 int apr_bit = prio >> (8 - PRIORITY_BITS);
1815 int reg_bit = apr_bit % 32;
1816 int apr_idx = group == Gicv3::G0S ?
1817 MISCREG_ICC_AP0R0_EL1 : MISCREG_ICC_AP1R0_EL1;
1818 RegVal apr = isa->readMiscRegNoEffect(apr_idx);
1819 apr |= (1 << reg_bit);
1820 isa->setMiscRegNoEffect(apr_idx, apr);
1821
1822 // Move interrupt state from pending to active.
1823 if (int_id < Gicv3::SGI_MAX + Gicv3::PPI_MAX) {
1824 // SGI or PPI, redistributor
1825 redistributor->activateIRQ(int_id);
1826 } else if (int_id < Gicv3::INTID_SECURE) {
1827 // SPI, distributor
1828 distributor->activateIRQ(int_id);
1829 } else if (int_id >= Gicv3Redistributor::SMALLEST_LPI_ID) {
1830 // LPI, Redistributor
1831 redistributor->setClrLPI(int_id, false);
1832 }
1833
1834 // By setting the priority to 0xff we are effectively
1835 // making the int_id not pending anymore at the cpu
1836 // interface.
1837 hppi.prio = 0xff;
1838 updateDistributor();
1839}
1840
1841void
1842Gicv3CPUInterface::virtualActivateIRQ(uint32_t lr_idx)
1843{
1844 // Update active priority registers.
1845 ICH_LR_EL2 ich_lr_el = isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 +
1846 lr_idx);
1847 Gicv3::GroupId group = ich_lr_el.Group ? Gicv3::G1NS : Gicv3::G0S;
1848 uint8_t prio = ich_lr_el.Priority & 0xf8;
1849 int apr_bit = prio >> (8 - VIRTUAL_PREEMPTION_BITS);
1850 int reg_no = apr_bit / 32;
1851 int reg_bit = apr_bit % 32;
1852 int apr_idx = group == Gicv3::G0S ?
1853 MISCREG_ICH_AP0R0_EL2 + reg_no : MISCREG_ICH_AP1R0_EL2 + reg_no;
1854 RegVal apr = isa->readMiscRegNoEffect(apr_idx);
1855 apr |= (1 << reg_bit);
1856 isa->setMiscRegNoEffect(apr_idx, apr);
1857 // Move interrupt state from pending to active.
1858 ich_lr_el.State = ICH_LR_EL2_STATE_ACTIVE;
1859 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx, ich_lr_el);
1860}
1861
1862void
1863Gicv3CPUInterface::deactivateIRQ(uint32_t int_id, Gicv3::GroupId group)
1864{
1865 if (int_id < Gicv3::SGI_MAX + Gicv3::PPI_MAX) {
1866 // SGI or PPI, redistributor
1867 redistributor->deactivateIRQ(int_id);
1868 } else if (int_id < Gicv3::INTID_SECURE) {
1869 // SPI, distributor
1870 distributor->deactivateIRQ(int_id);
1871 }
1872
1873 updateDistributor();
1874}
1875
1876void
1877Gicv3CPUInterface::virtualDeactivateIRQ(int lr_idx)
1878{
1879 ICH_LR_EL2 ich_lr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 +
1880 lr_idx);
1881
1882 if (ich_lr_el2.HW) {
1883 // Deactivate the associated physical interrupt
1884 if (ich_lr_el2.pINTID < Gicv3::INTID_SECURE) {
1885 Gicv3::GroupId group = ich_lr_el2.pINTID >= 32 ?
1886 distributor->getIntGroup(ich_lr_el2.pINTID) :
1887 redistributor->getIntGroup(ich_lr_el2.pINTID);
1888 deactivateIRQ(ich_lr_el2.pINTID, group);
1889 }
1890 }
1891
1892 // Remove the active bit
1893 ich_lr_el2.State = ich_lr_el2.State & ~ICH_LR_EL2_STATE_ACTIVE;
1894 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx, ich_lr_el2);
1895}
1896
1897/*
1898 * Returns the priority group field for the current BPR value for the group.
1899 * GroupBits() Pseudocode from spec.
1900 */
1901uint32_t
1902Gicv3CPUInterface::groupPriorityMask(Gicv3::GroupId group)
1903{
1904 ICC_CTLR_EL1 icc_ctlr_el1_s =
1905 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S);
1906 ICC_CTLR_EL1 icc_ctlr_el1_ns =
1907 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS);
1908
1909 if ((group == Gicv3::G1S && icc_ctlr_el1_s.CBPR) ||
1910 (group == Gicv3::G1NS && icc_ctlr_el1_ns.CBPR)) {
1911 group = Gicv3::G0S;
1912 }
1913
1914 int bpr;
1915
1916 if (group == Gicv3::G0S) {
1917 bpr = readMiscReg(MISCREG_ICC_BPR0_EL1) & 0x7;
1918 } else if (group == Gicv3::G1S) {
1919 bpr = bpr1(Gicv3::G1S) & 0x7;
1920 } else {
1921 bpr = bpr1(Gicv3::G1NS) & 0x7;
1922 }
1923
1924 if (group == Gicv3::G1NS) {
1925 assert(bpr > 0);
1926 bpr--;
1927 }
1928
1929 return ~0U << (bpr + 1);
1930}
1931
1932uint32_t
1933Gicv3CPUInterface::virtualGroupPriorityMask(Gicv3::GroupId group) const
1934{
1935 ICH_VMCR_EL2 ich_vmcr_el2 =
1936 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1937
1938 if ((group == Gicv3::G1NS) && ich_vmcr_el2.VCBPR) {
1939 group = Gicv3::G0S;
1940 }
1941
1942 int bpr;
1943
1944 if (group == Gicv3::G0S) {
1945 bpr = ich_vmcr_el2.VBPR0;
1946 } else {
1947 bpr = ich_vmcr_el2.VBPR1;
1948 }
1949
1950 if (group == Gicv3::G1NS) {
1951 assert(bpr > 0);
1952 bpr--;
1953 }
1954
1955 return ~0U << (bpr + 1);
1956}
1957
1958bool
1959Gicv3CPUInterface::isEOISplitMode() const
1960{
1961 if (isEL3OrMon()) {
1962 ICC_CTLR_EL3 icc_ctlr_el3 =
1963 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3);
1964 return icc_ctlr_el3.EOImode_EL3;
1965 } else {
1966 ICC_CTLR_EL1 icc_ctlr_el1 =
1967 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1);
1968 return icc_ctlr_el1.EOImode;
1969 }
1970}
1971
1972bool
1973Gicv3CPUInterface::virtualIsEOISplitMode() const
1974{
1975 ICH_VMCR_EL2 ich_vmcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
1976 return ich_vmcr_el2.VEOIM;
1977}
1978
1979int
1980Gicv3CPUInterface::highestActiveGroup() const
1981{
1982 int g0_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP0R0_EL1));
1983 int gq_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_S));
1984 int g1nz_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_NS));
1985
1986 if (g1nz_ctz < g0_ctz && g1nz_ctz < gq_ctz) {
1987 return Gicv3::G1NS;
1988 }
1989
1990 if (gq_ctz < g0_ctz) {
1991 return Gicv3::G1S;
1992 }
1993
1994 if (g0_ctz < 32) {
1995 return Gicv3::G0S;
1996 }
1997
1998 return -1;
1999}
2000
2001void
2002Gicv3CPUInterface::updateDistributor()
2003{
2004 distributor->update();
2005}
2006
2007void
2008Gicv3CPUInterface::update()
2009{
2010 bool signal_IRQ = false;
2011 bool signal_FIQ = false;
2012
2013 if (hppi.group == Gicv3::G1S && !haveEL(EL3)) {
2014 /*
2015 * Secure enabled GIC sending a G1S IRQ to a secure disabled
2016 * CPU -> send G0 IRQ
2017 */
2018 hppi.group = Gicv3::G0S;
2019 }
2020
2021 if (hppiCanPreempt()) {
2022 ArmISA::InterruptTypes int_type = intSignalType(hppi.group);
2023 DPRINTF(GIC, "Gicv3CPUInterface::update(): "
2024 "posting int as %d!\n", int_type);
2025 int_type == ArmISA::INT_IRQ ? signal_IRQ = true : signal_FIQ = true;
2026 }
2027
2028 if (signal_IRQ) {
2029 gic->postInt(cpuId, ArmISA::INT_IRQ);
2030 } else {
2031 gic->deassertInt(cpuId, ArmISA::INT_IRQ);
2032 }
2033
2034 if (signal_FIQ) {
2035 gic->postInt(cpuId, ArmISA::INT_FIQ);
2036 } else {
2037 gic->deassertInt(cpuId, ArmISA::INT_FIQ);
2038 }
2039}
2040
2041void
2042Gicv3CPUInterface::virtualUpdate()
2043{
2044 bool signal_IRQ = false;
2045 bool signal_FIQ = false;
2046 int lr_idx = getHPPVILR();
2047
2048 if (lr_idx >= 0) {
2049 ICH_LR_EL2 ich_lr_el2 =
2050 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
2051
2052 if (hppviCanPreempt(lr_idx)) {
2053 if (ich_lr_el2.Group) {
2054 signal_IRQ = true;
2055 } else {
2056 signal_FIQ = true;
2057 }
2058 }
2059 }
2060
2061 ICH_HCR_EL2 ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
2062
2063 if (ich_hcr_el2.En) {
2064 if (maintenanceInterruptStatus()) {
2065 maintenanceInterrupt->raise();
2066 }
2067 }
2068
2069 if (signal_IRQ) {
2070 DPRINTF(GIC, "Gicv3CPUInterface::virtualUpdate(): "
2071 "posting int as %d!\n", ArmISA::INT_VIRT_IRQ);
2072 gic->postInt(cpuId, ArmISA::INT_VIRT_IRQ);
2073 } else {
2074 gic->deassertInt(cpuId, ArmISA::INT_VIRT_IRQ);
2075 }
2076
2077 if (signal_FIQ) {
2078 DPRINTF(GIC, "Gicv3CPUInterface::virtualUpdate(): "
2079 "posting int as %d!\n", ArmISA::INT_VIRT_FIQ);
2080 gic->postInt(cpuId, ArmISA::INT_VIRT_FIQ);
2081 } else {
2082 gic->deassertInt(cpuId, ArmISA::INT_VIRT_FIQ);
2083 }
2084}
2085
2086// Returns the index of the LR with the HPPI
2087int
2088Gicv3CPUInterface::getHPPVILR() const
2089{
2090 int idx = -1;
2091 ICH_VMCR_EL2 ich_vmcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
2092
2093 if (!ich_vmcr_el2.VENG0 && !ich_vmcr_el2.VENG1) {
2094 // VG0 and VG1 disabled...
2095 return idx;
2096 }
2097
2098 uint8_t highest_prio = 0xff;
2099
2100 for (int i = 0; i < 16; i++) {
2101 ICH_LR_EL2 ich_lr_el2 =
2102 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + i);
2103
2104 if (ich_lr_el2.State != Gicv3::INT_PENDING) {
2105 continue;
2106 }
2107
2108 if (ich_lr_el2.Group) {
2109 // VG1
2110 if (!ich_vmcr_el2.VENG1) {
2111 continue;
2112 }
2113 } else {
2114 // VG0
2115 if (!ich_vmcr_el2.VENG0) {
2116 continue;
2117 }
2118 }
2119
2120 uint8_t prio = ich_lr_el2.Priority;
2121
2122 if (prio < highest_prio) {
2123 highest_prio = prio;
2124 idx = i;
2125 }
2126 }
2127
2128 return idx;
2129}
2130
2131bool
2132Gicv3CPUInterface::hppviCanPreempt(int lr_idx) const
2133{
2134 ICH_HCR_EL2 ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
2135 if (!ich_hcr_el2.En) {
2136 // virtual interface is disabled
2137 return false;
2138 }
2139
2140 ICH_LR_EL2 ich_lr_el2 =
2141 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
2142 uint8_t prio = ich_lr_el2.Priority;
2143 uint8_t vpmr =
2144 bits(isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2), 31, 24);
2145
2146 if (prio >= vpmr) {
2147 // prioriry masked
2148 return false;
2149 }
2150
2151 uint8_t rprio = virtualHighestActivePriority();
2152
2153 if (rprio == 0xff) {
2154 return true;
2155 }
2156
2157 Gicv3::GroupId group = ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S;
2158 uint32_t prio_mask = virtualGroupPriorityMask(group);
2159
2160 if ((prio & prio_mask) < (rprio & prio_mask)) {
2161 return true;
2162 }
2163
2164 return false;
2165}
2166
2167uint8_t
2168Gicv3CPUInterface::virtualHighestActivePriority() const
2169{
2170 uint8_t num_aprs = 1 << (VIRTUAL_PRIORITY_BITS - 5);
2171
2172 for (int i = 0; i < num_aprs; i++) {
2173 RegVal vapr =
2174 isa->readMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i) |
2175 isa->readMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i);
2176
2177 if (!vapr) {
2178 continue;
2179 }
2180
2181 return (i * 32 + ctz32(vapr)) << (GIC_MIN_VBPR + 1);
2182 }
2183
2184 // no active interrups, return idle priority
2185 return 0xff;
2186}
2187
2188void
2189Gicv3CPUInterface::virtualIncrementEOICount()
2190{
2191 // Increment the EOICOUNT field in ICH_HCR_EL2
2192 RegVal ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
2193 uint32_t EOI_cout = bits(ich_hcr_el2, 31, 27);
2194 EOI_cout++;
2195 ich_hcr_el2 = insertBits(ich_hcr_el2, 31, 27, EOI_cout);
2196 isa->setMiscRegNoEffect(MISCREG_ICH_HCR_EL2, ich_hcr_el2);
2197}
2198
2199// spec section 4.6.2
2200ArmISA::InterruptTypes
2201Gicv3CPUInterface::intSignalType(Gicv3::GroupId group) const
2202{
2203 bool is_fiq = false;
2204
2205 switch (group) {
2206 case Gicv3::G0S:
2207 is_fiq = true;
2208 break;
2209
2210 case Gicv3::G1S:
2211 is_fiq = (distributor->DS == 0) &&
2212 (!inSecureState() || ((currEL() == EL3) && isAA64()));
2213 break;
2214
2215 case Gicv3::G1NS:
2216 is_fiq = (distributor->DS == 0) && inSecureState();
2217 break;
2218
2219 default:
2220 panic("Gicv3CPUInterface::intSignalType(): invalid group!");
2221 }
2222
2223 if (is_fiq) {
2224 return ArmISA::INT_FIQ;
2225 } else {
2226 return ArmISA::INT_IRQ;
2227 }
2228}
2229
2230bool
2231Gicv3CPUInterface::hppiCanPreempt()
2232{
2233 if (hppi.prio == 0xff) {
2234 // there is no pending interrupt
2235 return false;
2236 }
2237
2238 if (!groupEnabled(hppi.group)) {
2239 // group disabled at CPU interface
2240 return false;
2241 }
2242
2243 if (hppi.prio >= isa->readMiscRegNoEffect(MISCREG_ICC_PMR_EL1)) {
2244 // priority masked
2245 return false;
2246 }
2247
2248 uint8_t rprio = highestActivePriority();
2249
2250 if (rprio == 0xff) {
2251 return true;
2252 }
2253
2254 uint32_t prio_mask = groupPriorityMask(hppi.group);
2255
2256 if ((hppi.prio & prio_mask) < (rprio & prio_mask)) {
2257 return true;
2258 }
2259
2260 return false;
2261}
2262
2263uint8_t
2264Gicv3CPUInterface::highestActivePriority() const
2265{
2266 uint32_t apr = isa->readMiscRegNoEffect(MISCREG_ICC_AP0R0_EL1) |
2267 isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_NS) |
2268 isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_S);
2269
2270 if (apr) {
2271 return ctz32(apr) << (GIC_MIN_BPR + 1);
2272 }
2273
2274 // no active interrups, return idle priority
2275 return 0xff;
2276}
2277
2278bool
2279Gicv3CPUInterface::groupEnabled(Gicv3::GroupId group) const
2280{
2281 switch (group) {
2282 case Gicv3::G0S: {
2283 ICC_IGRPEN0_EL1 icc_igrpen0_el1 =
2284 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN0_EL1);
2285 return icc_igrpen0_el1.Enable && distributor->EnableGrp0;
2286 }
2287
2288 case Gicv3::G1S: {
2289 ICC_IGRPEN1_EL1 icc_igrpen1_el1_s =
2290 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1_S);
2291 return icc_igrpen1_el1_s.Enable && distributor->EnableGrp1S;
2292 }
2293
2294 case Gicv3::G1NS: {
2295 ICC_IGRPEN1_EL1 icc_igrpen1_el1_ns =
2296 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1_NS);
2297 return icc_igrpen1_el1_ns.Enable && distributor->EnableGrp1NS;
2298 }
2299
2300 default:
2301 panic("Gicv3CPUInterface::groupEnable(): invalid group!\n");
2302 }
2303}
2304
2305bool
2306Gicv3CPUInterface::inSecureState() const
2307{
2308 if (!gic->getSystem()->haveSecurity()) {
2309 return false;
2310 }
2311
2312 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR);
2313 SCR scr = isa->readMiscRegNoEffect(MISCREG_SCR);
2314 return ArmISA::inSecureState(scr, cpsr);
2315}
2316
2317int
2318Gicv3CPUInterface::currEL() const
2319{
2320 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR);
2321 bool is_64 = opModeIs64((OperatingMode)(uint8_t) cpsr.mode);
2322
2323 if (is_64) {
2324 return (ExceptionLevel)(uint8_t) cpsr.el;
2325 } else {
2326 switch (cpsr.mode) {
2327 case MODE_USER:
2328 return 0;
2329
2330 case MODE_HYP:
2331 return 2;
2332
2333 case MODE_MON:
2334 return 3;
2335
2336 default:
2337 return 1;
2338 }
2339 }
2340}
2341
2342bool
2343Gicv3CPUInterface::haveEL(ExceptionLevel el) const
2344{
2345 switch (el) {
2346 case EL0:
2347 case EL1:
2348 return true;
2349
2350 case EL2:
2351 return gic->getSystem()->haveVirtualization();
2352
2353 case EL3:
2354 return gic->getSystem()->haveSecurity();
2355
2356 default:
2357 warn("Unimplemented Exception Level\n");
2358 return false;
2359 }
2360}
2361
2362bool
2363Gicv3CPUInterface::isSecureBelowEL3() const
2364{
2365 SCR scr = isa->readMiscRegNoEffect(MISCREG_SCR_EL3);
2366 return haveEL(EL3) && scr.ns == 0;
2367}
2368
2369bool
2370Gicv3CPUInterface::isAA64() const
2371{
2372 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR);
2373 return opModeIs64((OperatingMode)(uint8_t) cpsr.mode);
2374}
2375
2376bool
2377Gicv3CPUInterface::isEL3OrMon() const
2378{
2379 if (haveEL(EL3)) {
2380 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR);
2381 bool is_64 = opModeIs64((OperatingMode)(uint8_t) cpsr.mode);
2382
2383 if (is_64 && (cpsr.el == EL3)) {
2384 return true;
2385 } else if (!is_64 && (cpsr.mode == MODE_MON)) {
2386 return true;
2387 }
2388 }
2389
2390 return false;
2391}
2392
2393// Computes ICH_EISR_EL2
2394uint64_t
2395Gicv3CPUInterface::eoiMaintenanceInterruptStatus() const
2396{
2397 // ICH_EISR_EL2
2398 // Bits [63:16] - RES0
2399 // Status<n>, bit [n], for n = 0 to 15
2400 // EOI maintenance interrupt status bit for List register <n>:
2401 // 0 if List register <n>, ICH_LR<n>_EL2, does not have an EOI
2402 // maintenance interrupt.
2403 // 1 if List register <n>, ICH_LR<n>_EL2, has an EOI maintenance
2404 // interrupt that has not been handled.
2405 //
2406 // For any ICH_LR<n>_EL2, the corresponding status bit is set to 1 if all
2407 // of the following are true:
2408 // - ICH_LR<n>_EL2.State is 0b00 (ICH_LR_EL2_STATE_INVALID).
2409 // - ICH_LR<n>_EL2.HW is 0.
2410 // - ICH_LR<n>_EL2.EOI (bit [41]) is 1.
2411
2412 uint64_t value = 0;
2413
2414 for (int lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) {
2415 ICH_LR_EL2 ich_lr_el2 =
2416 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
2417
2418 if ((ich_lr_el2.State == ICH_LR_EL2_STATE_INVALID) &&
2419 !ich_lr_el2.HW && ich_lr_el2.EOI) {
2420 value |= (1 << lr_idx);
2421 }
2422 }
2423
2424 return value;
2425}
2426
2427Gicv3CPUInterface::ICH_MISR_EL2
2428Gicv3CPUInterface::maintenanceInterruptStatus() const
2429{
2430 // Comments are copied from SPEC section 9.4.7 (ID012119)
2431 ICH_MISR_EL2 ich_misr_el2 = 0;
2432 ICH_HCR_EL2 ich_hcr_el2 =
2433 isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2);
2434 ICH_VMCR_EL2 ich_vmcr_el2 =
2435 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2);
2436
2437 // End Of Interrupt. [bit 0]
2438 // This maintenance interrupt is asserted when at least one bit in
2439 // ICH_EISR_EL2 is 1.
2440
2441 if (eoiMaintenanceInterruptStatus()) {
2442 ich_misr_el2.EOI = 1;
2443 }
2444
2445 // Underflow. [bit 1]
2446 // This maintenance interrupt is asserted when ICH_HCR_EL2.UIE==1 and
2447 // zero or one of the List register entries are marked as a valid
2448 // interrupt, that is, if the corresponding ICH_LR<n>_EL2.State bits
2449 // do not equal 0x0.
2450 uint32_t num_valid_interrupts = 0;
2451 uint32_t num_pending_interrupts = 0;
2452
2453 for (int lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) {
2454 ICH_LR_EL2 ich_lr_el2 =
2455 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx);
2456
2457 if (ich_lr_el2.State != ICH_LR_EL2_STATE_INVALID) {
2458 num_valid_interrupts++;
2459 }
2460
2461 if (ich_lr_el2.State == ICH_LR_EL2_STATE_PENDING) {
2462 num_pending_interrupts++;
2463 }
2464 }
2465
2466 if (ich_hcr_el2.UIE && (num_valid_interrupts < 2)) {
2467 ich_misr_el2.U = 1;
2468 }
2469
2470 // List Register Entry Not Present. [bit 2]
2471 // This maintenance interrupt is asserted when ICH_HCR_EL2.LRENPIE==1
2472 // and ICH_HCR_EL2.EOIcount is non-zero.
2473 if (ich_hcr_el2.LRENPIE && ich_hcr_el2.EOIcount) {
2474 ich_misr_el2.LRENP = 1;
2475 }
2476
2477 // No Pending. [bit 3]
2478 // This maintenance interrupt is asserted when ICH_HCR_EL2.NPIE==1 and
2479 // no List register is in pending state.
2480 if (ich_hcr_el2.NPIE && (num_pending_interrupts == 0)) {
2481 ich_misr_el2.NP = 1;
2482 }
2483
2484 // vPE Group 0 Enabled. [bit 4]
2485 // This maintenance interrupt is asserted when
2486 // ICH_HCR_EL2.VGrp0EIE==1 and ICH_VMCR_EL2.VENG0==1.
2487 if (ich_hcr_el2.VGrp0EIE && ich_vmcr_el2.VENG0) {
2488 ich_misr_el2.VGrp0E = 1;
2489 }
2490
2491 // vPE Group 0 Disabled. [bit 5]
2492 // This maintenance interrupt is asserted when
2493 // ICH_HCR_EL2.VGrp0DIE==1 and ICH_VMCR_EL2.VENG0==0.
2494 if (ich_hcr_el2.VGrp0DIE && !ich_vmcr_el2.VENG0) {
2495 ich_misr_el2.VGrp0D = 1;
2496 }
2497
2498 // vPE Group 1 Enabled. [bit 6]
2499 // This maintenance interrupt is asserted when
2500 // ICH_HCR_EL2.VGrp1EIE==1 and ICH_VMCR_EL2.VENG1==is 1.
2501 if (ich_hcr_el2.VGrp1EIE && ich_vmcr_el2.VENG1) {
2502 ich_misr_el2.VGrp1E = 1;
2503 }
2504
2505 // vPE Group 1 Disabled. [bit 7]
2506 // This maintenance interrupt is asserted when
2507 // ICH_HCR_EL2.VGrp1DIE==1 and ICH_VMCR_EL2.VENG1==is 0.
2508 if (ich_hcr_el2.VGrp1DIE && !ich_vmcr_el2.VENG1) {
2509 ich_misr_el2.VGrp1D = 1;
2510 }
2511
2512 return ich_misr_el2;
2513}
2514
2515RegVal
2516Gicv3CPUInterface::bpr1(Gicv3::GroupId group)
2517{
2518 bool hcr_imo = getHCREL2IMO();
2519 if ((currEL() == EL1) && !inSecureState() && hcr_imo) {
2520 return readMiscReg(MISCREG_ICV_BPR1_EL1);
2521 }
2522
2523 RegVal bpr = 0;
2524
2525 if (group == Gicv3::G1S) {
2526 ICC_CTLR_EL1 icc_ctlr_el1_s =
2527 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S);
2528
2529 if (!isEL3OrMon() && icc_ctlr_el1_s.CBPR) {
2530 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR0_EL1);
2531 } else {
2532 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR1_EL1_S);
2533 bpr = bpr > GIC_MIN_BPR ? bpr : GIC_MIN_BPR;
2534 }
2535 } else if (group == Gicv3::G1NS) {
2536 ICC_CTLR_EL1 icc_ctlr_el1_ns =
2537 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS);
2538
2539 // Check if EL3 is implemented and this is a non secure accesses at
2540 // EL1 and EL2
2541 if (haveEL(EL3) && !isEL3OrMon() && icc_ctlr_el1_ns.CBPR) {
2542 // Reads return BPR0 + 1 saturated to 7, WI
2543 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR0_EL1) + 1;
2544 bpr = bpr < 7 ? bpr : 7;
2545 } else {
2546 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR1_EL1_NS);
2547 bpr = bpr > GIC_MIN_BPR_NS ? bpr : GIC_MIN_BPR_NS;
2548 }
2549 } else {
2550 panic("Should be used with G1S and G1NS only\n");
2551 }
2552
2553 return bpr;
2554}
2555
2556void
2557Gicv3CPUInterface::serialize(CheckpointOut & cp) const
2558{
2559 SERIALIZE_SCALAR(hppi.intid);
2560 SERIALIZE_SCALAR(hppi.prio);
2561 SERIALIZE_ENUM(hppi.group);
2562}
2563
2564void
2565Gicv3CPUInterface::unserialize(CheckpointIn & cp)
2566{
2567 UNSERIALIZE_SCALAR(hppi.intid);
2568 UNSERIALIZE_SCALAR(hppi.prio);
2569 UNSERIALIZE_ENUM(hppi.group);
2570}
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