isa.cc (12670:d662ee5a095a) isa.cc (12671:2a9f13f15e91)
1/*
2 * Copyright (c) 2010-2018 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 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Gabe Black
38 * Ali Saidi
39 */
40
41#include "arch/arm/isa.hh"
42#include "arch/arm/pmu.hh"
43#include "arch/arm/system.hh"
44#include "arch/arm/tlb.hh"
45#include "arch/arm/tlbi_op.hh"
46#include "cpu/base.hh"
47#include "cpu/checker/cpu.hh"
48#include "debug/Arm.hh"
49#include "debug/MiscRegs.hh"
50#include "dev/arm/generic_timer.hh"
51#include "params/ArmISA.hh"
52#include "sim/faults.hh"
53#include "sim/stat_control.hh"
54#include "sim/system.hh"
55
56namespace ArmISA
57{
58
59ISA::ISA(Params *p)
60 : SimObject(p),
61 system(NULL),
62 _decoderFlavour(p->decoderFlavour),
63 _vecRegRenameMode(p->vecRegRenameMode),
64 pmu(p->pmu)
65{
66 miscRegs[MISCREG_SCTLR_RST] = 0;
67
68 // Hook up a dummy device if we haven't been configured with a
69 // real PMU. By using a dummy device, we don't need to check that
70 // the PMU exist every time we try to access a PMU register.
71 if (!pmu)
72 pmu = &dummyDevice;
73
74 // Give all ISA devices a pointer to this ISA
75 pmu->setISA(this);
76
77 system = dynamic_cast<ArmSystem *>(p->system);
78
79 // Cache system-level properties
80 if (FullSystem && system) {
81 highestELIs64 = system->highestELIs64();
82 haveSecurity = system->haveSecurity();
83 haveLPAE = system->haveLPAE();
84 haveVirtualization = system->haveVirtualization();
85 haveLargeAsid64 = system->haveLargeAsid64();
86 physAddrRange64 = system->physAddrRange64();
87 } else {
88 highestELIs64 = true; // ArmSystem::highestELIs64 does the same
89 haveSecurity = haveLPAE = haveVirtualization = false;
90 haveLargeAsid64 = false;
91 physAddrRange64 = 32; // dummy value
92 }
93
94 initializeMiscRegMetadata();
95 preUnflattenMiscReg();
96
97 clear();
98}
99
100std::vector<struct ISA::MiscRegLUTEntry> ISA::lookUpMiscReg(NUM_MISCREGS);
101
102const ArmISAParams *
103ISA::params() const
104{
105 return dynamic_cast<const Params *>(_params);
106}
107
108void
109ISA::clear()
110{
111 const Params *p(params());
112
113 SCTLR sctlr_rst = miscRegs[MISCREG_SCTLR_RST];
114 memset(miscRegs, 0, sizeof(miscRegs));
115
116 // Initialize configurable default values
117 miscRegs[MISCREG_MIDR] = p->midr;
118 miscRegs[MISCREG_MIDR_EL1] = p->midr;
119 miscRegs[MISCREG_VPIDR] = p->midr;
120
121 if (FullSystem && system->highestELIs64()) {
122 // Initialize AArch64 state
123 clear64(p);
124 return;
125 }
126
127 // Initialize AArch32 state...
128
129 CPSR cpsr = 0;
130 cpsr.mode = MODE_USER;
131 miscRegs[MISCREG_CPSR] = cpsr;
132 updateRegMap(cpsr);
133
134 SCTLR sctlr = 0;
135 sctlr.te = (bool) sctlr_rst.te;
136 sctlr.nmfi = (bool) sctlr_rst.nmfi;
137 sctlr.v = (bool) sctlr_rst.v;
138 sctlr.u = 1;
139 sctlr.xp = 1;
140 sctlr.rao2 = 1;
141 sctlr.rao3 = 1;
142 sctlr.rao4 = 0xf; // SCTLR[6:3]
143 sctlr.uci = 1;
144 sctlr.dze = 1;
145 miscRegs[MISCREG_SCTLR_NS] = sctlr;
146 miscRegs[MISCREG_SCTLR_RST] = sctlr_rst;
147 miscRegs[MISCREG_HCPTR] = 0;
148
149 // Start with an event in the mailbox
150 miscRegs[MISCREG_SEV_MAILBOX] = 1;
151
152 // Separate Instruction and Data TLBs
153 miscRegs[MISCREG_TLBTR] = 1;
154
155 MVFR0 mvfr0 = 0;
156 mvfr0.advSimdRegisters = 2;
157 mvfr0.singlePrecision = 2;
158 mvfr0.doublePrecision = 2;
159 mvfr0.vfpExceptionTrapping = 0;
160 mvfr0.divide = 1;
161 mvfr0.squareRoot = 1;
162 mvfr0.shortVectors = 1;
163 mvfr0.roundingModes = 1;
164 miscRegs[MISCREG_MVFR0] = mvfr0;
165
166 MVFR1 mvfr1 = 0;
167 mvfr1.flushToZero = 1;
168 mvfr1.defaultNaN = 1;
169 mvfr1.advSimdLoadStore = 1;
170 mvfr1.advSimdInteger = 1;
171 mvfr1.advSimdSinglePrecision = 1;
172 mvfr1.advSimdHalfPrecision = 1;
173 mvfr1.vfpHalfPrecision = 1;
174 miscRegs[MISCREG_MVFR1] = mvfr1;
175
176 // Reset values of PRRR and NMRR are implementation dependent
177
178 // @todo: PRRR and NMRR in secure state?
179 miscRegs[MISCREG_PRRR_NS] =
180 (1 << 19) | // 19
181 (0 << 18) | // 18
182 (0 << 17) | // 17
183 (1 << 16) | // 16
184 (2 << 14) | // 15:14
185 (0 << 12) | // 13:12
186 (2 << 10) | // 11:10
187 (2 << 8) | // 9:8
188 (2 << 6) | // 7:6
189 (2 << 4) | // 5:4
190 (1 << 2) | // 3:2
191 0; // 1:0
192 miscRegs[MISCREG_NMRR_NS] =
193 (1 << 30) | // 31:30
194 (0 << 26) | // 27:26
195 (0 << 24) | // 25:24
196 (3 << 22) | // 23:22
197 (2 << 20) | // 21:20
198 (0 << 18) | // 19:18
199 (0 << 16) | // 17:16
200 (1 << 14) | // 15:14
201 (0 << 12) | // 13:12
202 (2 << 10) | // 11:10
203 (0 << 8) | // 9:8
204 (3 << 6) | // 7:6
205 (2 << 4) | // 5:4
206 (0 << 2) | // 3:2
207 0; // 1:0
208
209 miscRegs[MISCREG_CPACR] = 0;
210
211 miscRegs[MISCREG_ID_MMFR0] = p->id_mmfr0;
212 miscRegs[MISCREG_ID_MMFR1] = p->id_mmfr1;
213 miscRegs[MISCREG_ID_MMFR2] = p->id_mmfr2;
214 miscRegs[MISCREG_ID_MMFR3] = p->id_mmfr3;
215
216 miscRegs[MISCREG_ID_ISAR0] = p->id_isar0;
217 miscRegs[MISCREG_ID_ISAR1] = p->id_isar1;
218 miscRegs[MISCREG_ID_ISAR2] = p->id_isar2;
219 miscRegs[MISCREG_ID_ISAR3] = p->id_isar3;
220 miscRegs[MISCREG_ID_ISAR4] = p->id_isar4;
221 miscRegs[MISCREG_ID_ISAR5] = p->id_isar5;
222
223 miscRegs[MISCREG_FPSID] = p->fpsid;
224
225 if (haveLPAE) {
226 TTBCR ttbcr = miscRegs[MISCREG_TTBCR_NS];
227 ttbcr.eae = 0;
228 miscRegs[MISCREG_TTBCR_NS] = ttbcr;
229 // Enforce consistency with system-level settings
230 miscRegs[MISCREG_ID_MMFR0] = (miscRegs[MISCREG_ID_MMFR0] & ~0xf) | 0x5;
231 }
232
233 if (haveSecurity) {
234 miscRegs[MISCREG_SCTLR_S] = sctlr;
235 miscRegs[MISCREG_SCR] = 0;
236 miscRegs[MISCREG_VBAR_S] = 0;
237 } else {
238 // we're always non-secure
239 miscRegs[MISCREG_SCR] = 1;
240 }
241
242 //XXX We need to initialize the rest of the state.
243}
244
245void
246ISA::clear64(const ArmISAParams *p)
247{
248 CPSR cpsr = 0;
249 Addr rvbar = system->resetAddr64();
250 switch (system->highestEL()) {
251 // Set initial EL to highest implemented EL using associated stack
252 // pointer (SP_ELx); set RVBAR_ELx to implementation defined reset
253 // value
254 case EL3:
255 cpsr.mode = MODE_EL3H;
256 miscRegs[MISCREG_RVBAR_EL3] = rvbar;
257 break;
258 case EL2:
259 cpsr.mode = MODE_EL2H;
260 miscRegs[MISCREG_RVBAR_EL2] = rvbar;
261 break;
262 case EL1:
263 cpsr.mode = MODE_EL1H;
264 miscRegs[MISCREG_RVBAR_EL1] = rvbar;
265 break;
266 default:
267 panic("Invalid highest implemented exception level");
268 break;
269 }
270
271 // Initialize rest of CPSR
272 cpsr.daif = 0xf; // Mask all interrupts
273 cpsr.ss = 0;
274 cpsr.il = 0;
275 miscRegs[MISCREG_CPSR] = cpsr;
276 updateRegMap(cpsr);
277
278 // Initialize other control registers
279 miscRegs[MISCREG_MPIDR_EL1] = 0x80000000;
280 if (haveSecurity) {
281 miscRegs[MISCREG_SCTLR_EL3] = 0x30c50830;
282 miscRegs[MISCREG_SCR_EL3] = 0x00000030; // RES1 fields
283 } else if (haveVirtualization) {
284 // also MISCREG_SCTLR_EL2 (by mapping)
285 miscRegs[MISCREG_HSCTLR] = 0x30c50830;
286 } else {
287 // also MISCREG_SCTLR_EL1 (by mapping)
288 miscRegs[MISCREG_SCTLR_NS] = 0x30d00800 | 0x00050030; // RES1 | init
289 // Always non-secure
290 miscRegs[MISCREG_SCR_EL3] = 1;
291 }
292
293 // Initialize configurable id registers
294 miscRegs[MISCREG_ID_AA64AFR0_EL1] = p->id_aa64afr0_el1;
295 miscRegs[MISCREG_ID_AA64AFR1_EL1] = p->id_aa64afr1_el1;
296 miscRegs[MISCREG_ID_AA64DFR0_EL1] =
297 (p->id_aa64dfr0_el1 & 0xfffffffffffff0ffULL) |
298 (p->pmu ? 0x0000000000000100ULL : 0); // Enable PMUv3
299
300 miscRegs[MISCREG_ID_AA64DFR1_EL1] = p->id_aa64dfr1_el1;
301 miscRegs[MISCREG_ID_AA64ISAR0_EL1] = p->id_aa64isar0_el1;
302 miscRegs[MISCREG_ID_AA64ISAR1_EL1] = p->id_aa64isar1_el1;
303 miscRegs[MISCREG_ID_AA64MMFR0_EL1] = p->id_aa64mmfr0_el1;
304 miscRegs[MISCREG_ID_AA64MMFR1_EL1] = p->id_aa64mmfr1_el1;
305
306 miscRegs[MISCREG_ID_DFR0_EL1] =
307 (p->pmu ? 0x03000000ULL : 0); // Enable PMUv3
308
309 miscRegs[MISCREG_ID_DFR0] = miscRegs[MISCREG_ID_DFR0_EL1];
310
311 // Enforce consistency with system-level settings...
312
313 // EL3
314 miscRegs[MISCREG_ID_AA64PFR0_EL1] = insertBits(
315 miscRegs[MISCREG_ID_AA64PFR0_EL1], 15, 12,
316 haveSecurity ? 0x2 : 0x0);
317 // EL2
318 miscRegs[MISCREG_ID_AA64PFR0_EL1] = insertBits(
319 miscRegs[MISCREG_ID_AA64PFR0_EL1], 11, 8,
320 haveVirtualization ? 0x2 : 0x0);
321 // Large ASID support
322 miscRegs[MISCREG_ID_AA64MMFR0_EL1] = insertBits(
323 miscRegs[MISCREG_ID_AA64MMFR0_EL1], 7, 4,
324 haveLargeAsid64 ? 0x2 : 0x0);
325 // Physical address size
326 miscRegs[MISCREG_ID_AA64MMFR0_EL1] = insertBits(
327 miscRegs[MISCREG_ID_AA64MMFR0_EL1], 3, 0,
328 encodePhysAddrRange64(physAddrRange64));
329}
330
331MiscReg
332ISA::readMiscRegNoEffect(int misc_reg) const
333{
334 assert(misc_reg < NumMiscRegs);
335
336 const auto &reg = lookUpMiscReg[misc_reg]; // bit masks
337 const auto &map = getMiscIndices(misc_reg);
338 int lower = map.first, upper = map.second;
339 // NB!: apply architectural masks according to desired register,
340 // despite possibly getting value from different (mapped) register.
341 auto val = !upper ? miscRegs[lower] : ((miscRegs[lower] & mask(32))
342 |(miscRegs[upper] << 32));
343 if (val & reg.res0()) {
344 DPRINTF(MiscRegs, "Reading MiscReg %s with set res0 bits: %#x\n",
345 miscRegName[misc_reg], val & reg.res0());
346 }
347 if ((val & reg.res1()) != reg.res1()) {
348 DPRINTF(MiscRegs, "Reading MiscReg %s with clear res1 bits: %#x\n",
349 miscRegName[misc_reg], (val & reg.res1()) ^ reg.res1());
350 }
351 return (val & ~reg.raz()) | reg.rao(); // enforce raz/rao
352}
353
354
355MiscReg
356ISA::readMiscReg(int misc_reg, ThreadContext *tc)
357{
358 CPSR cpsr = 0;
359 PCState pc = 0;
360 SCR scr = 0;
361
362 if (misc_reg == MISCREG_CPSR) {
363 cpsr = miscRegs[misc_reg];
364 pc = tc->pcState();
365 cpsr.j = pc.jazelle() ? 1 : 0;
366 cpsr.t = pc.thumb() ? 1 : 0;
367 return cpsr;
368 }
369
370#ifndef NDEBUG
371 if (!miscRegInfo[misc_reg][MISCREG_IMPLEMENTED]) {
372 if (miscRegInfo[misc_reg][MISCREG_WARN_NOT_FAIL])
373 warn("Unimplemented system register %s read.\n",
374 miscRegName[misc_reg]);
375 else
376 panic("Unimplemented system register %s read.\n",
377 miscRegName[misc_reg]);
378 }
379#endif
380
381 switch (unflattenMiscReg(misc_reg)) {
382 case MISCREG_HCR:
383 {
384 if (!haveVirtualization)
385 return 0;
386 else
387 return readMiscRegNoEffect(MISCREG_HCR);
388 }
389 case MISCREG_CPACR:
390 {
391 const uint32_t ones = (uint32_t)(-1);
392 CPACR cpacrMask = 0;
393 // Only cp10, cp11, and ase are implemented, nothing else should
394 // be readable? (straight copy from the write code)
395 cpacrMask.cp10 = ones;
396 cpacrMask.cp11 = ones;
397 cpacrMask.asedis = ones;
398
399 // Security Extensions may limit the readability of CPACR
400 if (haveSecurity) {
401 scr = readMiscRegNoEffect(MISCREG_SCR);
402 cpsr = readMiscRegNoEffect(MISCREG_CPSR);
403 if (scr.ns && (cpsr.mode != MODE_MON) && ELIs32(tc, EL3)) {
404 NSACR nsacr = readMiscRegNoEffect(MISCREG_NSACR);
405 // NB: Skipping the full loop, here
406 if (!nsacr.cp10) cpacrMask.cp10 = 0;
407 if (!nsacr.cp11) cpacrMask.cp11 = 0;
408 }
409 }
410 MiscReg val = readMiscRegNoEffect(MISCREG_CPACR);
411 val &= cpacrMask;
412 DPRINTF(MiscRegs, "Reading misc reg %s: %#x\n",
413 miscRegName[misc_reg], val);
414 return val;
415 }
416 case MISCREG_MPIDR:
417 cpsr = readMiscRegNoEffect(MISCREG_CPSR);
418 scr = readMiscRegNoEffect(MISCREG_SCR);
419 if ((cpsr.mode == MODE_HYP) || inSecureState(scr, cpsr)) {
420 return getMPIDR(system, tc);
421 } else {
422 return readMiscReg(MISCREG_VMPIDR, tc);
423 }
424 break;
425 case MISCREG_MPIDR_EL1:
426 // @todo in the absence of v8 virtualization support just return MPIDR_EL1
427 return getMPIDR(system, tc) & 0xffffffff;
428 case MISCREG_VMPIDR:
429 // top bit defined as RES1
430 return readMiscRegNoEffect(misc_reg) | 0x80000000;
431 case MISCREG_ID_AFR0: // not implemented, so alias MIDR
432 case MISCREG_REVIDR: // not implemented, so alias MIDR
433 case MISCREG_MIDR:
434 cpsr = readMiscRegNoEffect(MISCREG_CPSR);
435 scr = readMiscRegNoEffect(MISCREG_SCR);
436 if ((cpsr.mode == MODE_HYP) || inSecureState(scr, cpsr)) {
437 return readMiscRegNoEffect(misc_reg);
438 } else {
439 return readMiscRegNoEffect(MISCREG_VPIDR);
440 }
441 break;
442 case MISCREG_JOSCR: // Jazelle trivial implementation, RAZ/WI
443 case MISCREG_JMCR: // Jazelle trivial implementation, RAZ/WI
444 case MISCREG_JIDR: // Jazelle trivial implementation, RAZ/WI
445 case MISCREG_AIDR: // AUX ID set to 0
446 case MISCREG_TCMTR: // No TCM's
447 return 0;
448
449 case MISCREG_CLIDR:
450 warn_once("The clidr register always reports 0 caches.\n");
451 warn_once("clidr LoUIS field of 0b001 to match current "
452 "ARM implementations.\n");
453 return 0x00200000;
454 case MISCREG_CCSIDR:
455 warn_once("The ccsidr register isn't implemented and "
456 "always reads as 0.\n");
457 break;
458 case MISCREG_CTR: // AArch32, ARMv7, top bit set
459 case MISCREG_CTR_EL0: // AArch64
460 {
461 //all caches have the same line size in gem5
462 //4 byte words in ARM
463 unsigned lineSizeWords =
464 tc->getSystemPtr()->cacheLineSize() / 4;
465 unsigned log2LineSizeWords = 0;
466
467 while (lineSizeWords >>= 1) {
468 ++log2LineSizeWords;
469 }
470
471 CTR ctr = 0;
472 //log2 of minimun i-cache line size (words)
473 ctr.iCacheLineSize = log2LineSizeWords;
474 //b11 - gem5 uses pipt
475 ctr.l1IndexPolicy = 0x3;
476 //log2 of minimum d-cache line size (words)
477 ctr.dCacheLineSize = log2LineSizeWords;
478 //log2 of max reservation size (words)
479 ctr.erg = log2LineSizeWords;
480 //log2 of max writeback size (words)
481 ctr.cwg = log2LineSizeWords;
482 //b100 - gem5 format is ARMv7
483 ctr.format = 0x4;
484
485 return ctr;
486 }
487 case MISCREG_ACTLR:
488 warn("Not doing anything for miscreg ACTLR\n");
489 break;
490
491 case MISCREG_PMXEVTYPER_PMCCFILTR:
492 case MISCREG_PMINTENSET_EL1 ... MISCREG_PMOVSSET_EL0:
493 case MISCREG_PMEVCNTR0_EL0 ... MISCREG_PMEVTYPER5_EL0:
494 case MISCREG_PMCR ... MISCREG_PMOVSSET:
495 return pmu->readMiscReg(misc_reg);
496
497 case MISCREG_CPSR_Q:
498 panic("shouldn't be reading this register seperately\n");
499 case MISCREG_FPSCR_QC:
500 return readMiscRegNoEffect(MISCREG_FPSCR) & ~FpscrQcMask;
501 case MISCREG_FPSCR_EXC:
502 return readMiscRegNoEffect(MISCREG_FPSCR) & ~FpscrExcMask;
503 case MISCREG_FPSR:
504 {
505 const uint32_t ones = (uint32_t)(-1);
506 FPSCR fpscrMask = 0;
507 fpscrMask.ioc = ones;
508 fpscrMask.dzc = ones;
509 fpscrMask.ofc = ones;
510 fpscrMask.ufc = ones;
511 fpscrMask.ixc = ones;
512 fpscrMask.idc = ones;
513 fpscrMask.qc = ones;
514 fpscrMask.v = ones;
515 fpscrMask.c = ones;
516 fpscrMask.z = ones;
517 fpscrMask.n = ones;
518 return readMiscRegNoEffect(MISCREG_FPSCR) & (uint32_t)fpscrMask;
519 }
520 case MISCREG_FPCR:
521 {
522 const uint32_t ones = (uint32_t)(-1);
523 FPSCR fpscrMask = 0;
524 fpscrMask.len = ones;
525 fpscrMask.stride = ones;
526 fpscrMask.rMode = ones;
527 fpscrMask.fz = ones;
528 fpscrMask.dn = ones;
529 fpscrMask.ahp = ones;
530 return readMiscRegNoEffect(MISCREG_FPSCR) & (uint32_t)fpscrMask;
531 }
532 case MISCREG_NZCV:
533 {
534 CPSR cpsr = 0;
535 cpsr.nz = tc->readCCReg(CCREG_NZ);
536 cpsr.c = tc->readCCReg(CCREG_C);
537 cpsr.v = tc->readCCReg(CCREG_V);
538 return cpsr;
539 }
540 case MISCREG_DAIF:
541 {
542 CPSR cpsr = 0;
543 cpsr.daif = (uint8_t) ((CPSR) miscRegs[MISCREG_CPSR]).daif;
544 return cpsr;
545 }
546 case MISCREG_SP_EL0:
547 {
548 return tc->readIntReg(INTREG_SP0);
549 }
550 case MISCREG_SP_EL1:
551 {
552 return tc->readIntReg(INTREG_SP1);
553 }
554 case MISCREG_SP_EL2:
555 {
556 return tc->readIntReg(INTREG_SP2);
557 }
558 case MISCREG_SPSEL:
559 {
560 return miscRegs[MISCREG_CPSR] & 0x1;
561 }
562 case MISCREG_CURRENTEL:
563 {
564 return miscRegs[MISCREG_CPSR] & 0xc;
565 }
566 case MISCREG_L2CTLR:
567 {
568 // mostly unimplemented, just set NumCPUs field from sim and return
569 L2CTLR l2ctlr = 0;
570 // b00:1CPU to b11:4CPUs
571 l2ctlr.numCPUs = tc->getSystemPtr()->numContexts() - 1;
572 return l2ctlr;
573 }
574 case MISCREG_DBGDIDR:
575 /* For now just implement the version number.
576 * ARMv7, v7.1 Debug architecture (0b0101 --> 0x5)
577 */
578 return 0x5 << 16;
579 case MISCREG_DBGDSCRint:
580 return 0;
581 case MISCREG_ISR:
582 return tc->getCpuPtr()->getInterruptController(tc->threadId())->getISR(
583 readMiscRegNoEffect(MISCREG_HCR),
584 readMiscRegNoEffect(MISCREG_CPSR),
585 readMiscRegNoEffect(MISCREG_SCR));
586 case MISCREG_ISR_EL1:
587 return tc->getCpuPtr()->getInterruptController(tc->threadId())->getISR(
588 readMiscRegNoEffect(MISCREG_HCR_EL2),
589 readMiscRegNoEffect(MISCREG_CPSR),
590 readMiscRegNoEffect(MISCREG_SCR_EL3));
591 case MISCREG_DCZID_EL0:
592 return 0x04; // DC ZVA clear 64-byte chunks
593 case MISCREG_HCPTR:
594 {
595 MiscReg val = readMiscRegNoEffect(misc_reg);
596 // The trap bit associated with CP14 is defined as RAZ
597 val &= ~(1 << 14);
598 // If a CP bit in NSACR is 0 then the corresponding bit in
599 // HCPTR is RAO/WI
600 bool secure_lookup = haveSecurity &&
601 inSecureState(readMiscRegNoEffect(MISCREG_SCR),
602 readMiscRegNoEffect(MISCREG_CPSR));
603 if (!secure_lookup) {
604 MiscReg mask = readMiscRegNoEffect(MISCREG_NSACR);
605 val |= (mask ^ 0x7FFF) & 0xBFFF;
606 }
607 // Set the bits for unimplemented coprocessors to RAO/WI
608 val |= 0x33FF;
609 return (val);
610 }
611 case MISCREG_HDFAR: // alias for secure DFAR
612 return readMiscRegNoEffect(MISCREG_DFAR_S);
613 case MISCREG_HIFAR: // alias for secure IFAR
614 return readMiscRegNoEffect(MISCREG_IFAR_S);
615 case MISCREG_HVBAR: // bottom bits reserved
616 return readMiscRegNoEffect(MISCREG_HVBAR) & 0xFFFFFFE0;
617 case MISCREG_SCTLR:
618 return (readMiscRegNoEffect(misc_reg) & 0x72DD39FF) | 0x00C00818;
619 case MISCREG_SCTLR_EL1:
620 return (readMiscRegNoEffect(misc_reg) & 0x37DDDBBF) | 0x30D00800;
621 case MISCREG_SCTLR_EL2:
622 case MISCREG_SCTLR_EL3:
623 case MISCREG_HSCTLR:
624 return (readMiscRegNoEffect(misc_reg) & 0x32CD183F) | 0x30C50830;
625
626 case MISCREG_ID_PFR0:
627 // !ThumbEE | !Jazelle | Thumb | ARM
628 return 0x00000031;
629 case MISCREG_ID_PFR1:
630 { // Timer | Virti | !M Profile | TrustZone | ARMv4
631 bool haveTimer = (system->getGenericTimer() != NULL);
632 return 0x00000001
633 | (haveSecurity ? 0x00000010 : 0x0)
634 | (haveVirtualization ? 0x00001000 : 0x0)
635 | (haveTimer ? 0x00010000 : 0x0);
636 }
637 case MISCREG_ID_AA64PFR0_EL1:
638 return 0x0000000000000002 // AArch{64,32} supported at EL0
639 | 0x0000000000000020 // EL1
640 | (haveVirtualization ? 0x0000000000000200 : 0) // EL2
641 | (haveSecurity ? 0x0000000000002000 : 0); // EL3
642 case MISCREG_ID_AA64PFR1_EL1:
643 return 0; // bits [63:0] RES0 (reserved for future use)
644
645 // Generic Timer registers
646 case MISCREG_CNTFRQ ... MISCREG_CNTHP_CTL:
647 case MISCREG_CNTPCT ... MISCREG_CNTHP_CVAL:
648 case MISCREG_CNTKCTL_EL1 ... MISCREG_CNTV_CVAL_EL0:
649 case MISCREG_CNTVOFF_EL2 ... MISCREG_CNTPS_CVAL_EL1:
650 return getGenericTimer(tc).readMiscReg(misc_reg);
651
652 default:
653 break;
654
655 }
656 return readMiscRegNoEffect(misc_reg);
657}
658
659void
660ISA::setMiscRegNoEffect(int misc_reg, const MiscReg &val)
661{
662 assert(misc_reg < NumMiscRegs);
663
664 const auto &reg = lookUpMiscReg[misc_reg]; // bit masks
665 const auto &map = getMiscIndices(misc_reg);
666 int lower = map.first, upper = map.second;
667
668 auto v = (val & ~reg.wi()) | reg.rao();
669 if (upper > 0) {
670 miscRegs[lower] = bits(v, 31, 0);
671 miscRegs[upper] = bits(v, 63, 32);
672 DPRINTF(MiscRegs, "Writing to misc reg %d (%d:%d) : %#x\n",
673 misc_reg, lower, upper, v);
674 } else {
675 miscRegs[lower] = v;
676 DPRINTF(MiscRegs, "Writing to misc reg %d (%d) : %#x\n",
677 misc_reg, lower, v);
678 }
679}
680
681void
682ISA::setMiscReg(int misc_reg, const MiscReg &val, ThreadContext *tc)
683{
684
685 MiscReg newVal = val;
686 bool secure_lookup;
687 SCR scr;
688
689 if (misc_reg == MISCREG_CPSR) {
690 updateRegMap(val);
691
692
693 CPSR old_cpsr = miscRegs[MISCREG_CPSR];
694 int old_mode = old_cpsr.mode;
695 CPSR cpsr = val;
696 if (old_mode != cpsr.mode || cpsr.il != old_cpsr.il) {
697 getITBPtr(tc)->invalidateMiscReg();
698 getDTBPtr(tc)->invalidateMiscReg();
699 }
700
701 DPRINTF(Arm, "Updating CPSR from %#x to %#x f:%d i:%d a:%d mode:%#x\n",
702 miscRegs[misc_reg], cpsr, cpsr.f, cpsr.i, cpsr.a, cpsr.mode);
703 PCState pc = tc->pcState();
704 pc.nextThumb(cpsr.t);
705 pc.nextJazelle(cpsr.j);
706
707 // Follow slightly different semantics if a CheckerCPU object
708 // is connected
709 CheckerCPU *checker = tc->getCheckerCpuPtr();
710 if (checker) {
711 tc->pcStateNoRecord(pc);
712 } else {
713 tc->pcState(pc);
714 }
715 } else {
716#ifndef NDEBUG
717 if (!miscRegInfo[misc_reg][MISCREG_IMPLEMENTED]) {
718 if (miscRegInfo[misc_reg][MISCREG_WARN_NOT_FAIL])
719 warn("Unimplemented system register %s write with %#x.\n",
720 miscRegName[misc_reg], val);
721 else
722 panic("Unimplemented system register %s write with %#x.\n",
723 miscRegName[misc_reg], val);
724 }
725#endif
726 switch (unflattenMiscReg(misc_reg)) {
727 case MISCREG_CPACR:
728 {
729
730 const uint32_t ones = (uint32_t)(-1);
731 CPACR cpacrMask = 0;
732 // Only cp10, cp11, and ase are implemented, nothing else should
733 // be writable
734 cpacrMask.cp10 = ones;
735 cpacrMask.cp11 = ones;
736 cpacrMask.asedis = ones;
737
738 // Security Extensions may limit the writability of CPACR
739 if (haveSecurity) {
740 scr = readMiscRegNoEffect(MISCREG_SCR);
741 CPSR cpsr = readMiscRegNoEffect(MISCREG_CPSR);
742 if (scr.ns && (cpsr.mode != MODE_MON) && ELIs32(tc, EL3)) {
743 NSACR nsacr = readMiscRegNoEffect(MISCREG_NSACR);
744 // NB: Skipping the full loop, here
745 if (!nsacr.cp10) cpacrMask.cp10 = 0;
746 if (!nsacr.cp11) cpacrMask.cp11 = 0;
747 }
748 }
749
750 MiscReg old_val = readMiscRegNoEffect(MISCREG_CPACR);
751 newVal &= cpacrMask;
752 newVal |= old_val & ~cpacrMask;
753 DPRINTF(MiscRegs, "Writing misc reg %s: %#x\n",
754 miscRegName[misc_reg], newVal);
755 }
756 break;
1/*
2 * Copyright (c) 2010-2018 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 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Gabe Black
38 * Ali Saidi
39 */
40
41#include "arch/arm/isa.hh"
42#include "arch/arm/pmu.hh"
43#include "arch/arm/system.hh"
44#include "arch/arm/tlb.hh"
45#include "arch/arm/tlbi_op.hh"
46#include "cpu/base.hh"
47#include "cpu/checker/cpu.hh"
48#include "debug/Arm.hh"
49#include "debug/MiscRegs.hh"
50#include "dev/arm/generic_timer.hh"
51#include "params/ArmISA.hh"
52#include "sim/faults.hh"
53#include "sim/stat_control.hh"
54#include "sim/system.hh"
55
56namespace ArmISA
57{
58
59ISA::ISA(Params *p)
60 : SimObject(p),
61 system(NULL),
62 _decoderFlavour(p->decoderFlavour),
63 _vecRegRenameMode(p->vecRegRenameMode),
64 pmu(p->pmu)
65{
66 miscRegs[MISCREG_SCTLR_RST] = 0;
67
68 // Hook up a dummy device if we haven't been configured with a
69 // real PMU. By using a dummy device, we don't need to check that
70 // the PMU exist every time we try to access a PMU register.
71 if (!pmu)
72 pmu = &dummyDevice;
73
74 // Give all ISA devices a pointer to this ISA
75 pmu->setISA(this);
76
77 system = dynamic_cast<ArmSystem *>(p->system);
78
79 // Cache system-level properties
80 if (FullSystem && system) {
81 highestELIs64 = system->highestELIs64();
82 haveSecurity = system->haveSecurity();
83 haveLPAE = system->haveLPAE();
84 haveVirtualization = system->haveVirtualization();
85 haveLargeAsid64 = system->haveLargeAsid64();
86 physAddrRange64 = system->physAddrRange64();
87 } else {
88 highestELIs64 = true; // ArmSystem::highestELIs64 does the same
89 haveSecurity = haveLPAE = haveVirtualization = false;
90 haveLargeAsid64 = false;
91 physAddrRange64 = 32; // dummy value
92 }
93
94 initializeMiscRegMetadata();
95 preUnflattenMiscReg();
96
97 clear();
98}
99
100std::vector<struct ISA::MiscRegLUTEntry> ISA::lookUpMiscReg(NUM_MISCREGS);
101
102const ArmISAParams *
103ISA::params() const
104{
105 return dynamic_cast<const Params *>(_params);
106}
107
108void
109ISA::clear()
110{
111 const Params *p(params());
112
113 SCTLR sctlr_rst = miscRegs[MISCREG_SCTLR_RST];
114 memset(miscRegs, 0, sizeof(miscRegs));
115
116 // Initialize configurable default values
117 miscRegs[MISCREG_MIDR] = p->midr;
118 miscRegs[MISCREG_MIDR_EL1] = p->midr;
119 miscRegs[MISCREG_VPIDR] = p->midr;
120
121 if (FullSystem && system->highestELIs64()) {
122 // Initialize AArch64 state
123 clear64(p);
124 return;
125 }
126
127 // Initialize AArch32 state...
128
129 CPSR cpsr = 0;
130 cpsr.mode = MODE_USER;
131 miscRegs[MISCREG_CPSR] = cpsr;
132 updateRegMap(cpsr);
133
134 SCTLR sctlr = 0;
135 sctlr.te = (bool) sctlr_rst.te;
136 sctlr.nmfi = (bool) sctlr_rst.nmfi;
137 sctlr.v = (bool) sctlr_rst.v;
138 sctlr.u = 1;
139 sctlr.xp = 1;
140 sctlr.rao2 = 1;
141 sctlr.rao3 = 1;
142 sctlr.rao4 = 0xf; // SCTLR[6:3]
143 sctlr.uci = 1;
144 sctlr.dze = 1;
145 miscRegs[MISCREG_SCTLR_NS] = sctlr;
146 miscRegs[MISCREG_SCTLR_RST] = sctlr_rst;
147 miscRegs[MISCREG_HCPTR] = 0;
148
149 // Start with an event in the mailbox
150 miscRegs[MISCREG_SEV_MAILBOX] = 1;
151
152 // Separate Instruction and Data TLBs
153 miscRegs[MISCREG_TLBTR] = 1;
154
155 MVFR0 mvfr0 = 0;
156 mvfr0.advSimdRegisters = 2;
157 mvfr0.singlePrecision = 2;
158 mvfr0.doublePrecision = 2;
159 mvfr0.vfpExceptionTrapping = 0;
160 mvfr0.divide = 1;
161 mvfr0.squareRoot = 1;
162 mvfr0.shortVectors = 1;
163 mvfr0.roundingModes = 1;
164 miscRegs[MISCREG_MVFR0] = mvfr0;
165
166 MVFR1 mvfr1 = 0;
167 mvfr1.flushToZero = 1;
168 mvfr1.defaultNaN = 1;
169 mvfr1.advSimdLoadStore = 1;
170 mvfr1.advSimdInteger = 1;
171 mvfr1.advSimdSinglePrecision = 1;
172 mvfr1.advSimdHalfPrecision = 1;
173 mvfr1.vfpHalfPrecision = 1;
174 miscRegs[MISCREG_MVFR1] = mvfr1;
175
176 // Reset values of PRRR and NMRR are implementation dependent
177
178 // @todo: PRRR and NMRR in secure state?
179 miscRegs[MISCREG_PRRR_NS] =
180 (1 << 19) | // 19
181 (0 << 18) | // 18
182 (0 << 17) | // 17
183 (1 << 16) | // 16
184 (2 << 14) | // 15:14
185 (0 << 12) | // 13:12
186 (2 << 10) | // 11:10
187 (2 << 8) | // 9:8
188 (2 << 6) | // 7:6
189 (2 << 4) | // 5:4
190 (1 << 2) | // 3:2
191 0; // 1:0
192 miscRegs[MISCREG_NMRR_NS] =
193 (1 << 30) | // 31:30
194 (0 << 26) | // 27:26
195 (0 << 24) | // 25:24
196 (3 << 22) | // 23:22
197 (2 << 20) | // 21:20
198 (0 << 18) | // 19:18
199 (0 << 16) | // 17:16
200 (1 << 14) | // 15:14
201 (0 << 12) | // 13:12
202 (2 << 10) | // 11:10
203 (0 << 8) | // 9:8
204 (3 << 6) | // 7:6
205 (2 << 4) | // 5:4
206 (0 << 2) | // 3:2
207 0; // 1:0
208
209 miscRegs[MISCREG_CPACR] = 0;
210
211 miscRegs[MISCREG_ID_MMFR0] = p->id_mmfr0;
212 miscRegs[MISCREG_ID_MMFR1] = p->id_mmfr1;
213 miscRegs[MISCREG_ID_MMFR2] = p->id_mmfr2;
214 miscRegs[MISCREG_ID_MMFR3] = p->id_mmfr3;
215
216 miscRegs[MISCREG_ID_ISAR0] = p->id_isar0;
217 miscRegs[MISCREG_ID_ISAR1] = p->id_isar1;
218 miscRegs[MISCREG_ID_ISAR2] = p->id_isar2;
219 miscRegs[MISCREG_ID_ISAR3] = p->id_isar3;
220 miscRegs[MISCREG_ID_ISAR4] = p->id_isar4;
221 miscRegs[MISCREG_ID_ISAR5] = p->id_isar5;
222
223 miscRegs[MISCREG_FPSID] = p->fpsid;
224
225 if (haveLPAE) {
226 TTBCR ttbcr = miscRegs[MISCREG_TTBCR_NS];
227 ttbcr.eae = 0;
228 miscRegs[MISCREG_TTBCR_NS] = ttbcr;
229 // Enforce consistency with system-level settings
230 miscRegs[MISCREG_ID_MMFR0] = (miscRegs[MISCREG_ID_MMFR0] & ~0xf) | 0x5;
231 }
232
233 if (haveSecurity) {
234 miscRegs[MISCREG_SCTLR_S] = sctlr;
235 miscRegs[MISCREG_SCR] = 0;
236 miscRegs[MISCREG_VBAR_S] = 0;
237 } else {
238 // we're always non-secure
239 miscRegs[MISCREG_SCR] = 1;
240 }
241
242 //XXX We need to initialize the rest of the state.
243}
244
245void
246ISA::clear64(const ArmISAParams *p)
247{
248 CPSR cpsr = 0;
249 Addr rvbar = system->resetAddr64();
250 switch (system->highestEL()) {
251 // Set initial EL to highest implemented EL using associated stack
252 // pointer (SP_ELx); set RVBAR_ELx to implementation defined reset
253 // value
254 case EL3:
255 cpsr.mode = MODE_EL3H;
256 miscRegs[MISCREG_RVBAR_EL3] = rvbar;
257 break;
258 case EL2:
259 cpsr.mode = MODE_EL2H;
260 miscRegs[MISCREG_RVBAR_EL2] = rvbar;
261 break;
262 case EL1:
263 cpsr.mode = MODE_EL1H;
264 miscRegs[MISCREG_RVBAR_EL1] = rvbar;
265 break;
266 default:
267 panic("Invalid highest implemented exception level");
268 break;
269 }
270
271 // Initialize rest of CPSR
272 cpsr.daif = 0xf; // Mask all interrupts
273 cpsr.ss = 0;
274 cpsr.il = 0;
275 miscRegs[MISCREG_CPSR] = cpsr;
276 updateRegMap(cpsr);
277
278 // Initialize other control registers
279 miscRegs[MISCREG_MPIDR_EL1] = 0x80000000;
280 if (haveSecurity) {
281 miscRegs[MISCREG_SCTLR_EL3] = 0x30c50830;
282 miscRegs[MISCREG_SCR_EL3] = 0x00000030; // RES1 fields
283 } else if (haveVirtualization) {
284 // also MISCREG_SCTLR_EL2 (by mapping)
285 miscRegs[MISCREG_HSCTLR] = 0x30c50830;
286 } else {
287 // also MISCREG_SCTLR_EL1 (by mapping)
288 miscRegs[MISCREG_SCTLR_NS] = 0x30d00800 | 0x00050030; // RES1 | init
289 // Always non-secure
290 miscRegs[MISCREG_SCR_EL3] = 1;
291 }
292
293 // Initialize configurable id registers
294 miscRegs[MISCREG_ID_AA64AFR0_EL1] = p->id_aa64afr0_el1;
295 miscRegs[MISCREG_ID_AA64AFR1_EL1] = p->id_aa64afr1_el1;
296 miscRegs[MISCREG_ID_AA64DFR0_EL1] =
297 (p->id_aa64dfr0_el1 & 0xfffffffffffff0ffULL) |
298 (p->pmu ? 0x0000000000000100ULL : 0); // Enable PMUv3
299
300 miscRegs[MISCREG_ID_AA64DFR1_EL1] = p->id_aa64dfr1_el1;
301 miscRegs[MISCREG_ID_AA64ISAR0_EL1] = p->id_aa64isar0_el1;
302 miscRegs[MISCREG_ID_AA64ISAR1_EL1] = p->id_aa64isar1_el1;
303 miscRegs[MISCREG_ID_AA64MMFR0_EL1] = p->id_aa64mmfr0_el1;
304 miscRegs[MISCREG_ID_AA64MMFR1_EL1] = p->id_aa64mmfr1_el1;
305
306 miscRegs[MISCREG_ID_DFR0_EL1] =
307 (p->pmu ? 0x03000000ULL : 0); // Enable PMUv3
308
309 miscRegs[MISCREG_ID_DFR0] = miscRegs[MISCREG_ID_DFR0_EL1];
310
311 // Enforce consistency with system-level settings...
312
313 // EL3
314 miscRegs[MISCREG_ID_AA64PFR0_EL1] = insertBits(
315 miscRegs[MISCREG_ID_AA64PFR0_EL1], 15, 12,
316 haveSecurity ? 0x2 : 0x0);
317 // EL2
318 miscRegs[MISCREG_ID_AA64PFR0_EL1] = insertBits(
319 miscRegs[MISCREG_ID_AA64PFR0_EL1], 11, 8,
320 haveVirtualization ? 0x2 : 0x0);
321 // Large ASID support
322 miscRegs[MISCREG_ID_AA64MMFR0_EL1] = insertBits(
323 miscRegs[MISCREG_ID_AA64MMFR0_EL1], 7, 4,
324 haveLargeAsid64 ? 0x2 : 0x0);
325 // Physical address size
326 miscRegs[MISCREG_ID_AA64MMFR0_EL1] = insertBits(
327 miscRegs[MISCREG_ID_AA64MMFR0_EL1], 3, 0,
328 encodePhysAddrRange64(physAddrRange64));
329}
330
331MiscReg
332ISA::readMiscRegNoEffect(int misc_reg) const
333{
334 assert(misc_reg < NumMiscRegs);
335
336 const auto &reg = lookUpMiscReg[misc_reg]; // bit masks
337 const auto &map = getMiscIndices(misc_reg);
338 int lower = map.first, upper = map.second;
339 // NB!: apply architectural masks according to desired register,
340 // despite possibly getting value from different (mapped) register.
341 auto val = !upper ? miscRegs[lower] : ((miscRegs[lower] & mask(32))
342 |(miscRegs[upper] << 32));
343 if (val & reg.res0()) {
344 DPRINTF(MiscRegs, "Reading MiscReg %s with set res0 bits: %#x\n",
345 miscRegName[misc_reg], val & reg.res0());
346 }
347 if ((val & reg.res1()) != reg.res1()) {
348 DPRINTF(MiscRegs, "Reading MiscReg %s with clear res1 bits: %#x\n",
349 miscRegName[misc_reg], (val & reg.res1()) ^ reg.res1());
350 }
351 return (val & ~reg.raz()) | reg.rao(); // enforce raz/rao
352}
353
354
355MiscReg
356ISA::readMiscReg(int misc_reg, ThreadContext *tc)
357{
358 CPSR cpsr = 0;
359 PCState pc = 0;
360 SCR scr = 0;
361
362 if (misc_reg == MISCREG_CPSR) {
363 cpsr = miscRegs[misc_reg];
364 pc = tc->pcState();
365 cpsr.j = pc.jazelle() ? 1 : 0;
366 cpsr.t = pc.thumb() ? 1 : 0;
367 return cpsr;
368 }
369
370#ifndef NDEBUG
371 if (!miscRegInfo[misc_reg][MISCREG_IMPLEMENTED]) {
372 if (miscRegInfo[misc_reg][MISCREG_WARN_NOT_FAIL])
373 warn("Unimplemented system register %s read.\n",
374 miscRegName[misc_reg]);
375 else
376 panic("Unimplemented system register %s read.\n",
377 miscRegName[misc_reg]);
378 }
379#endif
380
381 switch (unflattenMiscReg(misc_reg)) {
382 case MISCREG_HCR:
383 {
384 if (!haveVirtualization)
385 return 0;
386 else
387 return readMiscRegNoEffect(MISCREG_HCR);
388 }
389 case MISCREG_CPACR:
390 {
391 const uint32_t ones = (uint32_t)(-1);
392 CPACR cpacrMask = 0;
393 // Only cp10, cp11, and ase are implemented, nothing else should
394 // be readable? (straight copy from the write code)
395 cpacrMask.cp10 = ones;
396 cpacrMask.cp11 = ones;
397 cpacrMask.asedis = ones;
398
399 // Security Extensions may limit the readability of CPACR
400 if (haveSecurity) {
401 scr = readMiscRegNoEffect(MISCREG_SCR);
402 cpsr = readMiscRegNoEffect(MISCREG_CPSR);
403 if (scr.ns && (cpsr.mode != MODE_MON) && ELIs32(tc, EL3)) {
404 NSACR nsacr = readMiscRegNoEffect(MISCREG_NSACR);
405 // NB: Skipping the full loop, here
406 if (!nsacr.cp10) cpacrMask.cp10 = 0;
407 if (!nsacr.cp11) cpacrMask.cp11 = 0;
408 }
409 }
410 MiscReg val = readMiscRegNoEffect(MISCREG_CPACR);
411 val &= cpacrMask;
412 DPRINTF(MiscRegs, "Reading misc reg %s: %#x\n",
413 miscRegName[misc_reg], val);
414 return val;
415 }
416 case MISCREG_MPIDR:
417 cpsr = readMiscRegNoEffect(MISCREG_CPSR);
418 scr = readMiscRegNoEffect(MISCREG_SCR);
419 if ((cpsr.mode == MODE_HYP) || inSecureState(scr, cpsr)) {
420 return getMPIDR(system, tc);
421 } else {
422 return readMiscReg(MISCREG_VMPIDR, tc);
423 }
424 break;
425 case MISCREG_MPIDR_EL1:
426 // @todo in the absence of v8 virtualization support just return MPIDR_EL1
427 return getMPIDR(system, tc) & 0xffffffff;
428 case MISCREG_VMPIDR:
429 // top bit defined as RES1
430 return readMiscRegNoEffect(misc_reg) | 0x80000000;
431 case MISCREG_ID_AFR0: // not implemented, so alias MIDR
432 case MISCREG_REVIDR: // not implemented, so alias MIDR
433 case MISCREG_MIDR:
434 cpsr = readMiscRegNoEffect(MISCREG_CPSR);
435 scr = readMiscRegNoEffect(MISCREG_SCR);
436 if ((cpsr.mode == MODE_HYP) || inSecureState(scr, cpsr)) {
437 return readMiscRegNoEffect(misc_reg);
438 } else {
439 return readMiscRegNoEffect(MISCREG_VPIDR);
440 }
441 break;
442 case MISCREG_JOSCR: // Jazelle trivial implementation, RAZ/WI
443 case MISCREG_JMCR: // Jazelle trivial implementation, RAZ/WI
444 case MISCREG_JIDR: // Jazelle trivial implementation, RAZ/WI
445 case MISCREG_AIDR: // AUX ID set to 0
446 case MISCREG_TCMTR: // No TCM's
447 return 0;
448
449 case MISCREG_CLIDR:
450 warn_once("The clidr register always reports 0 caches.\n");
451 warn_once("clidr LoUIS field of 0b001 to match current "
452 "ARM implementations.\n");
453 return 0x00200000;
454 case MISCREG_CCSIDR:
455 warn_once("The ccsidr register isn't implemented and "
456 "always reads as 0.\n");
457 break;
458 case MISCREG_CTR: // AArch32, ARMv7, top bit set
459 case MISCREG_CTR_EL0: // AArch64
460 {
461 //all caches have the same line size in gem5
462 //4 byte words in ARM
463 unsigned lineSizeWords =
464 tc->getSystemPtr()->cacheLineSize() / 4;
465 unsigned log2LineSizeWords = 0;
466
467 while (lineSizeWords >>= 1) {
468 ++log2LineSizeWords;
469 }
470
471 CTR ctr = 0;
472 //log2 of minimun i-cache line size (words)
473 ctr.iCacheLineSize = log2LineSizeWords;
474 //b11 - gem5 uses pipt
475 ctr.l1IndexPolicy = 0x3;
476 //log2 of minimum d-cache line size (words)
477 ctr.dCacheLineSize = log2LineSizeWords;
478 //log2 of max reservation size (words)
479 ctr.erg = log2LineSizeWords;
480 //log2 of max writeback size (words)
481 ctr.cwg = log2LineSizeWords;
482 //b100 - gem5 format is ARMv7
483 ctr.format = 0x4;
484
485 return ctr;
486 }
487 case MISCREG_ACTLR:
488 warn("Not doing anything for miscreg ACTLR\n");
489 break;
490
491 case MISCREG_PMXEVTYPER_PMCCFILTR:
492 case MISCREG_PMINTENSET_EL1 ... MISCREG_PMOVSSET_EL0:
493 case MISCREG_PMEVCNTR0_EL0 ... MISCREG_PMEVTYPER5_EL0:
494 case MISCREG_PMCR ... MISCREG_PMOVSSET:
495 return pmu->readMiscReg(misc_reg);
496
497 case MISCREG_CPSR_Q:
498 panic("shouldn't be reading this register seperately\n");
499 case MISCREG_FPSCR_QC:
500 return readMiscRegNoEffect(MISCREG_FPSCR) & ~FpscrQcMask;
501 case MISCREG_FPSCR_EXC:
502 return readMiscRegNoEffect(MISCREG_FPSCR) & ~FpscrExcMask;
503 case MISCREG_FPSR:
504 {
505 const uint32_t ones = (uint32_t)(-1);
506 FPSCR fpscrMask = 0;
507 fpscrMask.ioc = ones;
508 fpscrMask.dzc = ones;
509 fpscrMask.ofc = ones;
510 fpscrMask.ufc = ones;
511 fpscrMask.ixc = ones;
512 fpscrMask.idc = ones;
513 fpscrMask.qc = ones;
514 fpscrMask.v = ones;
515 fpscrMask.c = ones;
516 fpscrMask.z = ones;
517 fpscrMask.n = ones;
518 return readMiscRegNoEffect(MISCREG_FPSCR) & (uint32_t)fpscrMask;
519 }
520 case MISCREG_FPCR:
521 {
522 const uint32_t ones = (uint32_t)(-1);
523 FPSCR fpscrMask = 0;
524 fpscrMask.len = ones;
525 fpscrMask.stride = ones;
526 fpscrMask.rMode = ones;
527 fpscrMask.fz = ones;
528 fpscrMask.dn = ones;
529 fpscrMask.ahp = ones;
530 return readMiscRegNoEffect(MISCREG_FPSCR) & (uint32_t)fpscrMask;
531 }
532 case MISCREG_NZCV:
533 {
534 CPSR cpsr = 0;
535 cpsr.nz = tc->readCCReg(CCREG_NZ);
536 cpsr.c = tc->readCCReg(CCREG_C);
537 cpsr.v = tc->readCCReg(CCREG_V);
538 return cpsr;
539 }
540 case MISCREG_DAIF:
541 {
542 CPSR cpsr = 0;
543 cpsr.daif = (uint8_t) ((CPSR) miscRegs[MISCREG_CPSR]).daif;
544 return cpsr;
545 }
546 case MISCREG_SP_EL0:
547 {
548 return tc->readIntReg(INTREG_SP0);
549 }
550 case MISCREG_SP_EL1:
551 {
552 return tc->readIntReg(INTREG_SP1);
553 }
554 case MISCREG_SP_EL2:
555 {
556 return tc->readIntReg(INTREG_SP2);
557 }
558 case MISCREG_SPSEL:
559 {
560 return miscRegs[MISCREG_CPSR] & 0x1;
561 }
562 case MISCREG_CURRENTEL:
563 {
564 return miscRegs[MISCREG_CPSR] & 0xc;
565 }
566 case MISCREG_L2CTLR:
567 {
568 // mostly unimplemented, just set NumCPUs field from sim and return
569 L2CTLR l2ctlr = 0;
570 // b00:1CPU to b11:4CPUs
571 l2ctlr.numCPUs = tc->getSystemPtr()->numContexts() - 1;
572 return l2ctlr;
573 }
574 case MISCREG_DBGDIDR:
575 /* For now just implement the version number.
576 * ARMv7, v7.1 Debug architecture (0b0101 --> 0x5)
577 */
578 return 0x5 << 16;
579 case MISCREG_DBGDSCRint:
580 return 0;
581 case MISCREG_ISR:
582 return tc->getCpuPtr()->getInterruptController(tc->threadId())->getISR(
583 readMiscRegNoEffect(MISCREG_HCR),
584 readMiscRegNoEffect(MISCREG_CPSR),
585 readMiscRegNoEffect(MISCREG_SCR));
586 case MISCREG_ISR_EL1:
587 return tc->getCpuPtr()->getInterruptController(tc->threadId())->getISR(
588 readMiscRegNoEffect(MISCREG_HCR_EL2),
589 readMiscRegNoEffect(MISCREG_CPSR),
590 readMiscRegNoEffect(MISCREG_SCR_EL3));
591 case MISCREG_DCZID_EL0:
592 return 0x04; // DC ZVA clear 64-byte chunks
593 case MISCREG_HCPTR:
594 {
595 MiscReg val = readMiscRegNoEffect(misc_reg);
596 // The trap bit associated with CP14 is defined as RAZ
597 val &= ~(1 << 14);
598 // If a CP bit in NSACR is 0 then the corresponding bit in
599 // HCPTR is RAO/WI
600 bool secure_lookup = haveSecurity &&
601 inSecureState(readMiscRegNoEffect(MISCREG_SCR),
602 readMiscRegNoEffect(MISCREG_CPSR));
603 if (!secure_lookup) {
604 MiscReg mask = readMiscRegNoEffect(MISCREG_NSACR);
605 val |= (mask ^ 0x7FFF) & 0xBFFF;
606 }
607 // Set the bits for unimplemented coprocessors to RAO/WI
608 val |= 0x33FF;
609 return (val);
610 }
611 case MISCREG_HDFAR: // alias for secure DFAR
612 return readMiscRegNoEffect(MISCREG_DFAR_S);
613 case MISCREG_HIFAR: // alias for secure IFAR
614 return readMiscRegNoEffect(MISCREG_IFAR_S);
615 case MISCREG_HVBAR: // bottom bits reserved
616 return readMiscRegNoEffect(MISCREG_HVBAR) & 0xFFFFFFE0;
617 case MISCREG_SCTLR:
618 return (readMiscRegNoEffect(misc_reg) & 0x72DD39FF) | 0x00C00818;
619 case MISCREG_SCTLR_EL1:
620 return (readMiscRegNoEffect(misc_reg) & 0x37DDDBBF) | 0x30D00800;
621 case MISCREG_SCTLR_EL2:
622 case MISCREG_SCTLR_EL3:
623 case MISCREG_HSCTLR:
624 return (readMiscRegNoEffect(misc_reg) & 0x32CD183F) | 0x30C50830;
625
626 case MISCREG_ID_PFR0:
627 // !ThumbEE | !Jazelle | Thumb | ARM
628 return 0x00000031;
629 case MISCREG_ID_PFR1:
630 { // Timer | Virti | !M Profile | TrustZone | ARMv4
631 bool haveTimer = (system->getGenericTimer() != NULL);
632 return 0x00000001
633 | (haveSecurity ? 0x00000010 : 0x0)
634 | (haveVirtualization ? 0x00001000 : 0x0)
635 | (haveTimer ? 0x00010000 : 0x0);
636 }
637 case MISCREG_ID_AA64PFR0_EL1:
638 return 0x0000000000000002 // AArch{64,32} supported at EL0
639 | 0x0000000000000020 // EL1
640 | (haveVirtualization ? 0x0000000000000200 : 0) // EL2
641 | (haveSecurity ? 0x0000000000002000 : 0); // EL3
642 case MISCREG_ID_AA64PFR1_EL1:
643 return 0; // bits [63:0] RES0 (reserved for future use)
644
645 // Generic Timer registers
646 case MISCREG_CNTFRQ ... MISCREG_CNTHP_CTL:
647 case MISCREG_CNTPCT ... MISCREG_CNTHP_CVAL:
648 case MISCREG_CNTKCTL_EL1 ... MISCREG_CNTV_CVAL_EL0:
649 case MISCREG_CNTVOFF_EL2 ... MISCREG_CNTPS_CVAL_EL1:
650 return getGenericTimer(tc).readMiscReg(misc_reg);
651
652 default:
653 break;
654
655 }
656 return readMiscRegNoEffect(misc_reg);
657}
658
659void
660ISA::setMiscRegNoEffect(int misc_reg, const MiscReg &val)
661{
662 assert(misc_reg < NumMiscRegs);
663
664 const auto &reg = lookUpMiscReg[misc_reg]; // bit masks
665 const auto &map = getMiscIndices(misc_reg);
666 int lower = map.first, upper = map.second;
667
668 auto v = (val & ~reg.wi()) | reg.rao();
669 if (upper > 0) {
670 miscRegs[lower] = bits(v, 31, 0);
671 miscRegs[upper] = bits(v, 63, 32);
672 DPRINTF(MiscRegs, "Writing to misc reg %d (%d:%d) : %#x\n",
673 misc_reg, lower, upper, v);
674 } else {
675 miscRegs[lower] = v;
676 DPRINTF(MiscRegs, "Writing to misc reg %d (%d) : %#x\n",
677 misc_reg, lower, v);
678 }
679}
680
681void
682ISA::setMiscReg(int misc_reg, const MiscReg &val, ThreadContext *tc)
683{
684
685 MiscReg newVal = val;
686 bool secure_lookup;
687 SCR scr;
688
689 if (misc_reg == MISCREG_CPSR) {
690 updateRegMap(val);
691
692
693 CPSR old_cpsr = miscRegs[MISCREG_CPSR];
694 int old_mode = old_cpsr.mode;
695 CPSR cpsr = val;
696 if (old_mode != cpsr.mode || cpsr.il != old_cpsr.il) {
697 getITBPtr(tc)->invalidateMiscReg();
698 getDTBPtr(tc)->invalidateMiscReg();
699 }
700
701 DPRINTF(Arm, "Updating CPSR from %#x to %#x f:%d i:%d a:%d mode:%#x\n",
702 miscRegs[misc_reg], cpsr, cpsr.f, cpsr.i, cpsr.a, cpsr.mode);
703 PCState pc = tc->pcState();
704 pc.nextThumb(cpsr.t);
705 pc.nextJazelle(cpsr.j);
706
707 // Follow slightly different semantics if a CheckerCPU object
708 // is connected
709 CheckerCPU *checker = tc->getCheckerCpuPtr();
710 if (checker) {
711 tc->pcStateNoRecord(pc);
712 } else {
713 tc->pcState(pc);
714 }
715 } else {
716#ifndef NDEBUG
717 if (!miscRegInfo[misc_reg][MISCREG_IMPLEMENTED]) {
718 if (miscRegInfo[misc_reg][MISCREG_WARN_NOT_FAIL])
719 warn("Unimplemented system register %s write with %#x.\n",
720 miscRegName[misc_reg], val);
721 else
722 panic("Unimplemented system register %s write with %#x.\n",
723 miscRegName[misc_reg], val);
724 }
725#endif
726 switch (unflattenMiscReg(misc_reg)) {
727 case MISCREG_CPACR:
728 {
729
730 const uint32_t ones = (uint32_t)(-1);
731 CPACR cpacrMask = 0;
732 // Only cp10, cp11, and ase are implemented, nothing else should
733 // be writable
734 cpacrMask.cp10 = ones;
735 cpacrMask.cp11 = ones;
736 cpacrMask.asedis = ones;
737
738 // Security Extensions may limit the writability of CPACR
739 if (haveSecurity) {
740 scr = readMiscRegNoEffect(MISCREG_SCR);
741 CPSR cpsr = readMiscRegNoEffect(MISCREG_CPSR);
742 if (scr.ns && (cpsr.mode != MODE_MON) && ELIs32(tc, EL3)) {
743 NSACR nsacr = readMiscRegNoEffect(MISCREG_NSACR);
744 // NB: Skipping the full loop, here
745 if (!nsacr.cp10) cpacrMask.cp10 = 0;
746 if (!nsacr.cp11) cpacrMask.cp11 = 0;
747 }
748 }
749
750 MiscReg old_val = readMiscRegNoEffect(MISCREG_CPACR);
751 newVal &= cpacrMask;
752 newVal |= old_val & ~cpacrMask;
753 DPRINTF(MiscRegs, "Writing misc reg %s: %#x\n",
754 miscRegName[misc_reg], newVal);
755 }
756 break;
757 case MISCREG_CPACR_EL1:
758 {
759 const uint32_t ones = (uint32_t)(-1);
760 CPACR cpacrMask = 0;
761 cpacrMask.tta = ones;
762 cpacrMask.fpen = ones;
763 newVal &= cpacrMask;
764 DPRINTF(MiscRegs, "Writing misc reg %s: %#x\n",
765 miscRegName[misc_reg], newVal);
766 }
767 break;
768 case MISCREG_CPTR_EL2:
769 {
770 const uint32_t ones = (uint32_t)(-1);
771 CPTR cptrMask = 0;
772 cptrMask.tcpac = ones;
773 cptrMask.tta = ones;
774 cptrMask.tfp = ones;
775 newVal &= cptrMask;
776 cptrMask = 0;
777 cptrMask.res1_13_12_el2 = ones;
778 cptrMask.res1_9_0_el2 = ones;
779 newVal |= cptrMask;
780 DPRINTF(MiscRegs, "Writing misc reg %s: %#x\n",
781 miscRegName[misc_reg], newVal);
782 }
783 break;
784 case MISCREG_CPTR_EL3:
785 {
786 const uint32_t ones = (uint32_t)(-1);
787 CPTR cptrMask = 0;
788 cptrMask.tcpac = ones;
789 cptrMask.tta = ones;
790 cptrMask.tfp = ones;
791 newVal &= cptrMask;
792 DPRINTF(MiscRegs, "Writing misc reg %s: %#x\n",
793 miscRegName[misc_reg], newVal);
794 }
795 break;
796 case MISCREG_CSSELR:
797 warn_once("The csselr register isn't implemented.\n");
798 return;
799
800 case MISCREG_DC_ZVA_Xt:
801 warn("Calling DC ZVA! Not Implemeted! Expect WEIRD results\n");
802 return;
803
804 case MISCREG_FPSCR:
805 {
806 const uint32_t ones = (uint32_t)(-1);
807 FPSCR fpscrMask = 0;
808 fpscrMask.ioc = ones;
809 fpscrMask.dzc = ones;
810 fpscrMask.ofc = ones;
811 fpscrMask.ufc = ones;
812 fpscrMask.ixc = ones;
813 fpscrMask.idc = ones;
814 fpscrMask.ioe = ones;
815 fpscrMask.dze = ones;
816 fpscrMask.ofe = ones;
817 fpscrMask.ufe = ones;
818 fpscrMask.ixe = ones;
819 fpscrMask.ide = ones;
820 fpscrMask.len = ones;
821 fpscrMask.stride = ones;
822 fpscrMask.rMode = ones;
823 fpscrMask.fz = ones;
824 fpscrMask.dn = ones;
825 fpscrMask.ahp = ones;
826 fpscrMask.qc = ones;
827 fpscrMask.v = ones;
828 fpscrMask.c = ones;
829 fpscrMask.z = ones;
830 fpscrMask.n = ones;
831 newVal = (newVal & (uint32_t)fpscrMask) |
832 (readMiscRegNoEffect(MISCREG_FPSCR) &
833 ~(uint32_t)fpscrMask);
834 tc->getDecoderPtr()->setContext(newVal);
835 }
836 break;
837 case MISCREG_FPSR:
838 {
839 const uint32_t ones = (uint32_t)(-1);
840 FPSCR fpscrMask = 0;
841 fpscrMask.ioc = ones;
842 fpscrMask.dzc = ones;
843 fpscrMask.ofc = ones;
844 fpscrMask.ufc = ones;
845 fpscrMask.ixc = ones;
846 fpscrMask.idc = ones;
847 fpscrMask.qc = ones;
848 fpscrMask.v = ones;
849 fpscrMask.c = ones;
850 fpscrMask.z = ones;
851 fpscrMask.n = ones;
852 newVal = (newVal & (uint32_t)fpscrMask) |
853 (readMiscRegNoEffect(MISCREG_FPSCR) &
854 ~(uint32_t)fpscrMask);
855 misc_reg = MISCREG_FPSCR;
856 }
857 break;
858 case MISCREG_FPCR:
859 {
860 const uint32_t ones = (uint32_t)(-1);
861 FPSCR fpscrMask = 0;
862 fpscrMask.len = ones;
863 fpscrMask.stride = ones;
864 fpscrMask.rMode = ones;
865 fpscrMask.fz = ones;
866 fpscrMask.dn = ones;
867 fpscrMask.ahp = ones;
868 newVal = (newVal & (uint32_t)fpscrMask) |
869 (readMiscRegNoEffect(MISCREG_FPSCR) &
870 ~(uint32_t)fpscrMask);
871 misc_reg = MISCREG_FPSCR;
872 }
873 break;
874 case MISCREG_CPSR_Q:
875 {
876 assert(!(newVal & ~CpsrMaskQ));
877 newVal = readMiscRegNoEffect(MISCREG_CPSR) | newVal;
878 misc_reg = MISCREG_CPSR;
879 }
880 break;
881 case MISCREG_FPSCR_QC:
882 {
883 newVal = readMiscRegNoEffect(MISCREG_FPSCR) |
884 (newVal & FpscrQcMask);
885 misc_reg = MISCREG_FPSCR;
886 }
887 break;
888 case MISCREG_FPSCR_EXC:
889 {
890 newVal = readMiscRegNoEffect(MISCREG_FPSCR) |
891 (newVal & FpscrExcMask);
892 misc_reg = MISCREG_FPSCR;
893 }
894 break;
895 case MISCREG_FPEXC:
896 {
897 // vfpv3 architecture, section B.6.1 of DDI04068
898 // bit 29 - valid only if fpexc[31] is 0
899 const uint32_t fpexcMask = 0x60000000;
900 newVal = (newVal & fpexcMask) |
901 (readMiscRegNoEffect(MISCREG_FPEXC) & ~fpexcMask);
902 }
903 break;
904 case MISCREG_HCR:
905 {
906 if (!haveVirtualization)
907 return;
908 }
909 break;
910 case MISCREG_IFSR:
911 {
912 // ARM ARM (ARM DDI 0406C.b) B4.1.96
913 const uint32_t ifsrMask =
914 mask(31, 13) | mask(11, 11) | mask(8, 6);
915 newVal = newVal & ~ifsrMask;
916 }
917 break;
918 case MISCREG_DFSR:
919 {
920 // ARM ARM (ARM DDI 0406C.b) B4.1.52
921 const uint32_t dfsrMask = mask(31, 14) | mask(8, 8);
922 newVal = newVal & ~dfsrMask;
923 }
924 break;
925 case MISCREG_AMAIR0:
926 case MISCREG_AMAIR1:
927 {
928 // ARM ARM (ARM DDI 0406C.b) B4.1.5
929 // Valid only with LPAE
930 if (!haveLPAE)
931 return;
932 DPRINTF(MiscRegs, "Writing AMAIR: %#x\n", newVal);
933 }
934 break;
935 case MISCREG_SCR:
936 getITBPtr(tc)->invalidateMiscReg();
937 getDTBPtr(tc)->invalidateMiscReg();
938 break;
939 case MISCREG_SCTLR:
940 {
941 DPRINTF(MiscRegs, "Writing SCTLR: %#x\n", newVal);
942 scr = readMiscRegNoEffect(MISCREG_SCR);
943
944 MiscRegIndex sctlr_idx;
945 if (haveSecurity && !highestELIs64 && !scr.ns) {
946 sctlr_idx = MISCREG_SCTLR_S;
947 } else {
948 sctlr_idx = MISCREG_SCTLR_NS;
949 }
950
951 SCTLR sctlr = miscRegs[sctlr_idx];
952 SCTLR new_sctlr = newVal;
953 new_sctlr.nmfi = ((bool)sctlr.nmfi) && !haveVirtualization;
954 miscRegs[sctlr_idx] = (MiscReg)new_sctlr;
955 getITBPtr(tc)->invalidateMiscReg();
956 getDTBPtr(tc)->invalidateMiscReg();
957 }
958 case MISCREG_MIDR:
959 case MISCREG_ID_PFR0:
960 case MISCREG_ID_PFR1:
961 case MISCREG_ID_DFR0:
962 case MISCREG_ID_MMFR0:
963 case MISCREG_ID_MMFR1:
964 case MISCREG_ID_MMFR2:
965 case MISCREG_ID_MMFR3:
966 case MISCREG_ID_ISAR0:
967 case MISCREG_ID_ISAR1:
968 case MISCREG_ID_ISAR2:
969 case MISCREG_ID_ISAR3:
970 case MISCREG_ID_ISAR4:
971 case MISCREG_ID_ISAR5:
972
973 case MISCREG_MPIDR:
974 case MISCREG_FPSID:
975 case MISCREG_TLBTR:
976 case MISCREG_MVFR0:
977 case MISCREG_MVFR1:
978
979 case MISCREG_ID_AA64AFR0_EL1:
980 case MISCREG_ID_AA64AFR1_EL1:
981 case MISCREG_ID_AA64DFR0_EL1:
982 case MISCREG_ID_AA64DFR1_EL1:
983 case MISCREG_ID_AA64ISAR0_EL1:
984 case MISCREG_ID_AA64ISAR1_EL1:
985 case MISCREG_ID_AA64MMFR0_EL1:
986 case MISCREG_ID_AA64MMFR1_EL1:
987 case MISCREG_ID_AA64PFR0_EL1:
988 case MISCREG_ID_AA64PFR1_EL1:
989 // ID registers are constants.
990 return;
991
992 // TLB Invalidate All
993 case MISCREG_TLBIALL: // TLBI all entries, EL0&1,
994 {
995 assert32(tc);
996 scr = readMiscReg(MISCREG_SCR, tc);
997
998 TLBIALL tlbiOp(EL1, haveSecurity && !scr.ns);
999 tlbiOp(tc);
1000 return;
1001 }
1002 // TLB Invalidate All, Inner Shareable
1003 case MISCREG_TLBIALLIS:
1004 {
1005 assert32(tc);
1006 scr = readMiscReg(MISCREG_SCR, tc);
1007
1008 TLBIALL tlbiOp(EL1, haveSecurity && !scr.ns);
1009 tlbiOp.broadcast(tc);
1010 return;
1011 }
1012 // Instruction TLB Invalidate All
1013 case MISCREG_ITLBIALL:
1014 {
1015 assert32(tc);
1016 scr = readMiscReg(MISCREG_SCR, tc);
1017
1018 ITLBIALL tlbiOp(EL1, haveSecurity && !scr.ns);
1019 tlbiOp(tc);
1020 return;
1021 }
1022 // Data TLB Invalidate All
1023 case MISCREG_DTLBIALL:
1024 {
1025 assert32(tc);
1026 scr = readMiscReg(MISCREG_SCR, tc);
1027
1028 DTLBIALL tlbiOp(EL1, haveSecurity && !scr.ns);
1029 tlbiOp(tc);
1030 return;
1031 }
1032 // TLB Invalidate by VA
1033 // mcr tlbimval(is) is invalidating all matching entries
1034 // regardless of the level of lookup, since in gem5 we cache
1035 // in the tlb the last level of lookup only.
1036 case MISCREG_TLBIMVA:
1037 case MISCREG_TLBIMVAL:
1038 {
1039 assert32(tc);
1040 scr = readMiscReg(MISCREG_SCR, tc);
1041
1042 TLBIMVA tlbiOp(EL1,
1043 haveSecurity && !scr.ns,
1044 mbits(newVal, 31, 12),
1045 bits(newVal, 7,0));
1046
1047 tlbiOp(tc);
1048 return;
1049 }
1050 // TLB Invalidate by VA, Inner Shareable
1051 case MISCREG_TLBIMVAIS:
1052 case MISCREG_TLBIMVALIS:
1053 {
1054 assert32(tc);
1055 scr = readMiscReg(MISCREG_SCR, tc);
1056
1057 TLBIMVA tlbiOp(EL1,
1058 haveSecurity && !scr.ns,
1059 mbits(newVal, 31, 12),
1060 bits(newVal, 7,0));
1061
1062 tlbiOp.broadcast(tc);
1063 return;
1064 }
1065 // TLB Invalidate by ASID match
1066 case MISCREG_TLBIASID:
1067 {
1068 assert32(tc);
1069 scr = readMiscReg(MISCREG_SCR, tc);
1070
1071 TLBIASID tlbiOp(EL1,
1072 haveSecurity && !scr.ns,
1073 bits(newVal, 7,0));
1074
1075 tlbiOp(tc);
1076 return;
1077 }
1078 // TLB Invalidate by ASID match, Inner Shareable
1079 case MISCREG_TLBIASIDIS:
1080 {
1081 assert32(tc);
1082 scr = readMiscReg(MISCREG_SCR, tc);
1083
1084 TLBIASID tlbiOp(EL1,
1085 haveSecurity && !scr.ns,
1086 bits(newVal, 7,0));
1087
1088 tlbiOp.broadcast(tc);
1089 return;
1090 }
1091 // mcr tlbimvaal(is) is invalidating all matching entries
1092 // regardless of the level of lookup, since in gem5 we cache
1093 // in the tlb the last level of lookup only.
1094 // TLB Invalidate by VA, All ASID
1095 case MISCREG_TLBIMVAA:
1096 case MISCREG_TLBIMVAAL:
1097 {
1098 assert32(tc);
1099 scr = readMiscReg(MISCREG_SCR, tc);
1100
1101 TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns,
1102 mbits(newVal, 31,12), false);
1103
1104 tlbiOp(tc);
1105 return;
1106 }
1107 // TLB Invalidate by VA, All ASID, Inner Shareable
1108 case MISCREG_TLBIMVAAIS:
1109 case MISCREG_TLBIMVAALIS:
1110 {
1111 assert32(tc);
1112 scr = readMiscReg(MISCREG_SCR, tc);
1113
1114 TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns,
1115 mbits(newVal, 31,12), false);
1116
1117 tlbiOp.broadcast(tc);
1118 return;
1119 }
1120 // mcr tlbimvalh(is) is invalidating all matching entries
1121 // regardless of the level of lookup, since in gem5 we cache
1122 // in the tlb the last level of lookup only.
1123 // TLB Invalidate by VA, Hyp mode
1124 case MISCREG_TLBIMVAH:
1125 case MISCREG_TLBIMVALH:
1126 {
1127 assert32(tc);
1128 scr = readMiscReg(MISCREG_SCR, tc);
1129
1130 TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns,
1131 mbits(newVal, 31,12), true);
1132
1133 tlbiOp(tc);
1134 return;
1135 }
1136 // TLB Invalidate by VA, Hyp mode, Inner Shareable
1137 case MISCREG_TLBIMVAHIS:
1138 case MISCREG_TLBIMVALHIS:
1139 {
1140 assert32(tc);
1141 scr = readMiscReg(MISCREG_SCR, tc);
1142
1143 TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns,
1144 mbits(newVal, 31,12), true);
1145
1146 tlbiOp.broadcast(tc);
1147 return;
1148 }
1149 // mcr tlbiipas2l(is) is invalidating all matching entries
1150 // regardless of the level of lookup, since in gem5 we cache
1151 // in the tlb the last level of lookup only.
1152 // TLB Invalidate by Intermediate Physical Address, Stage 2
1153 case MISCREG_TLBIIPAS2:
1154 case MISCREG_TLBIIPAS2L:
1155 {
1156 assert32(tc);
1157 scr = readMiscReg(MISCREG_SCR, tc);
1158
1159 TLBIIPA tlbiOp(EL1,
1160 haveSecurity && !scr.ns,
1161 static_cast<Addr>(bits(newVal, 35, 0)) << 12);
1162
1163 tlbiOp(tc);
1164 return;
1165 }
1166 // TLB Invalidate by Intermediate Physical Address, Stage 2,
1167 // Inner Shareable
1168 case MISCREG_TLBIIPAS2IS:
1169 case MISCREG_TLBIIPAS2LIS:
1170 {
1171 assert32(tc);
1172 scr = readMiscReg(MISCREG_SCR, tc);
1173
1174 TLBIIPA tlbiOp(EL1,
1175 haveSecurity && !scr.ns,
1176 static_cast<Addr>(bits(newVal, 35, 0)) << 12);
1177
1178 tlbiOp.broadcast(tc);
1179 return;
1180 }
1181 // Instruction TLB Invalidate by VA
1182 case MISCREG_ITLBIMVA:
1183 {
1184 assert32(tc);
1185 scr = readMiscReg(MISCREG_SCR, tc);
1186
1187 ITLBIMVA tlbiOp(EL1,
1188 haveSecurity && !scr.ns,
1189 mbits(newVal, 31, 12),
1190 bits(newVal, 7,0));
1191
1192 tlbiOp(tc);
1193 return;
1194 }
1195 // Data TLB Invalidate by VA
1196 case MISCREG_DTLBIMVA:
1197 {
1198 assert32(tc);
1199 scr = readMiscReg(MISCREG_SCR, tc);
1200
1201 DTLBIMVA tlbiOp(EL1,
1202 haveSecurity && !scr.ns,
1203 mbits(newVal, 31, 12),
1204 bits(newVal, 7,0));
1205
1206 tlbiOp(tc);
1207 return;
1208 }
1209 // Instruction TLB Invalidate by ASID match
1210 case MISCREG_ITLBIASID:
1211 {
1212 assert32(tc);
1213 scr = readMiscReg(MISCREG_SCR, tc);
1214
1215 ITLBIASID tlbiOp(EL1,
1216 haveSecurity && !scr.ns,
1217 bits(newVal, 7,0));
1218
1219 tlbiOp(tc);
1220 return;
1221 }
1222 // Data TLB Invalidate by ASID match
1223 case MISCREG_DTLBIASID:
1224 {
1225 assert32(tc);
1226 scr = readMiscReg(MISCREG_SCR, tc);
1227
1228 DTLBIASID tlbiOp(EL1,
1229 haveSecurity && !scr.ns,
1230 bits(newVal, 7,0));
1231
1232 tlbiOp(tc);
1233 return;
1234 }
1235 // TLB Invalidate All, Non-Secure Non-Hyp
1236 case MISCREG_TLBIALLNSNH:
1237 {
1238 assert32(tc);
1239
1240 TLBIALLN tlbiOp(EL1, false);
1241 tlbiOp(tc);
1242 return;
1243 }
1244 // TLB Invalidate All, Non-Secure Non-Hyp, Inner Shareable
1245 case MISCREG_TLBIALLNSNHIS:
1246 {
1247 assert32(tc);
1248
1249 TLBIALLN tlbiOp(EL1, false);
1250 tlbiOp.broadcast(tc);
1251 return;
1252 }
1253 // TLB Invalidate All, Hyp mode
1254 case MISCREG_TLBIALLH:
1255 {
1256 assert32(tc);
1257
1258 TLBIALLN tlbiOp(EL1, true);
1259 tlbiOp(tc);
1260 return;
1261 }
1262 // TLB Invalidate All, Hyp mode, Inner Shareable
1263 case MISCREG_TLBIALLHIS:
1264 {
1265 assert32(tc);
1266
1267 TLBIALLN tlbiOp(EL1, true);
1268 tlbiOp.broadcast(tc);
1269 return;
1270 }
1271 // AArch64 TLB Invalidate All, EL3
1272 case MISCREG_TLBI_ALLE3:
1273 {
1274 assert64(tc);
1275
1276 TLBIALL tlbiOp(EL3, true);
1277 tlbiOp(tc);
1278 return;
1279 }
1280 // AArch64 TLB Invalidate All, EL3, Inner Shareable
1281 case MISCREG_TLBI_ALLE3IS:
1282 {
1283 assert64(tc);
1284
1285 TLBIALL tlbiOp(EL3, true);
1286 tlbiOp.broadcast(tc);
1287 return;
1288 }
1289 // @todo: uncomment this to enable Virtualization
1290 // case MISCREG_TLBI_ALLE2IS:
1291 // case MISCREG_TLBI_ALLE2:
1292 // AArch64 TLB Invalidate All, EL1
1293 case MISCREG_TLBI_ALLE1:
1294 case MISCREG_TLBI_VMALLE1:
1295 case MISCREG_TLBI_VMALLS12E1:
1296 // @todo: handle VMID and stage 2 to enable Virtualization
1297 {
1298 assert64(tc);
1299 scr = readMiscReg(MISCREG_SCR, tc);
1300
1301 TLBIALL tlbiOp(EL1, haveSecurity && !scr.ns);
1302 tlbiOp(tc);
1303 return;
1304 }
1305 // AArch64 TLB Invalidate All, EL1, Inner Shareable
1306 case MISCREG_TLBI_ALLE1IS:
1307 case MISCREG_TLBI_VMALLE1IS:
1308 case MISCREG_TLBI_VMALLS12E1IS:
1309 // @todo: handle VMID and stage 2 to enable Virtualization
1310 {
1311 assert64(tc);
1312 scr = readMiscReg(MISCREG_SCR, tc);
1313
1314 TLBIALL tlbiOp(EL1, haveSecurity && !scr.ns);
1315 tlbiOp.broadcast(tc);
1316 return;
1317 }
1318 // VAEx(IS) and VALEx(IS) are the same because TLBs
1319 // only store entries
1320 // from the last level of translation table walks
1321 // @todo: handle VMID to enable Virtualization
1322 // AArch64 TLB Invalidate by VA, EL3
1323 case MISCREG_TLBI_VAE3_Xt:
1324 case MISCREG_TLBI_VALE3_Xt:
1325 {
1326 assert64(tc);
1327
1328 TLBIMVA tlbiOp(EL3, true,
1329 static_cast<Addr>(bits(newVal, 43, 0)) << 12,
1330 0xbeef);
1331 tlbiOp(tc);
1332 return;
1333 }
1334 // AArch64 TLB Invalidate by VA, EL3, Inner Shareable
1335 case MISCREG_TLBI_VAE3IS_Xt:
1336 case MISCREG_TLBI_VALE3IS_Xt:
1337 {
1338 assert64(tc);
1339
1340 TLBIMVA tlbiOp(EL3, true,
1341 static_cast<Addr>(bits(newVal, 43, 0)) << 12,
1342 0xbeef);
1343
1344 tlbiOp.broadcast(tc);
1345 return;
1346 }
1347 // AArch64 TLB Invalidate by VA, EL2
1348 case MISCREG_TLBI_VAE2_Xt:
1349 case MISCREG_TLBI_VALE2_Xt:
1350 {
1351 assert64(tc);
1352 scr = readMiscReg(MISCREG_SCR, tc);
1353
1354 TLBIMVA tlbiOp(EL2, haveSecurity && !scr.ns,
1355 static_cast<Addr>(bits(newVal, 43, 0)) << 12,
1356 0xbeef);
1357 tlbiOp(tc);
1358 return;
1359 }
1360 // AArch64 TLB Invalidate by VA, EL2, Inner Shareable
1361 case MISCREG_TLBI_VAE2IS_Xt:
1362 case MISCREG_TLBI_VALE2IS_Xt:
1363 {
1364 assert64(tc);
1365 scr = readMiscReg(MISCREG_SCR, tc);
1366
1367 TLBIMVA tlbiOp(EL2, haveSecurity && !scr.ns,
1368 static_cast<Addr>(bits(newVal, 43, 0)) << 12,
1369 0xbeef);
1370
1371 tlbiOp.broadcast(tc);
1372 return;
1373 }
1374 // AArch64 TLB Invalidate by VA, EL1
1375 case MISCREG_TLBI_VAE1_Xt:
1376 case MISCREG_TLBI_VALE1_Xt:
1377 {
1378 assert64(tc);
1379 scr = readMiscReg(MISCREG_SCR, tc);
1380 auto asid = haveLargeAsid64 ? bits(newVal, 63, 48) :
1381 bits(newVal, 55, 48);
1382
1383 TLBIMVA tlbiOp(EL1, haveSecurity && !scr.ns,
1384 static_cast<Addr>(bits(newVal, 43, 0)) << 12,
1385 asid);
1386
1387 tlbiOp(tc);
1388 return;
1389 }
1390 // AArch64 TLB Invalidate by VA, EL1, Inner Shareable
1391 case MISCREG_TLBI_VAE1IS_Xt:
1392 case MISCREG_TLBI_VALE1IS_Xt:
1393 {
1394 assert64(tc);
1395 scr = readMiscReg(MISCREG_SCR, tc);
1396 auto asid = haveLargeAsid64 ? bits(newVal, 63, 48) :
1397 bits(newVal, 55, 48);
1398
1399 TLBIMVA tlbiOp(EL1, haveSecurity && !scr.ns,
1400 static_cast<Addr>(bits(newVal, 43, 0)) << 12,
1401 asid);
1402
1403 tlbiOp.broadcast(tc);
1404 return;
1405 }
1406 // AArch64 TLB Invalidate by ASID, EL1
1407 // @todo: handle VMID to enable Virtualization
1408 case MISCREG_TLBI_ASIDE1_Xt:
1409 {
1410 assert64(tc);
1411 scr = readMiscReg(MISCREG_SCR, tc);
1412 auto asid = haveLargeAsid64 ? bits(newVal, 63, 48) :
1413 bits(newVal, 55, 48);
1414
1415 TLBIASID tlbiOp(EL1, haveSecurity && !scr.ns, asid);
1416 tlbiOp(tc);
1417 return;
1418 }
1419 // AArch64 TLB Invalidate by ASID, EL1, Inner Shareable
1420 case MISCREG_TLBI_ASIDE1IS_Xt:
1421 {
1422 assert64(tc);
1423 scr = readMiscReg(MISCREG_SCR, tc);
1424 auto asid = haveLargeAsid64 ? bits(newVal, 63, 48) :
1425 bits(newVal, 55, 48);
1426
1427 TLBIASID tlbiOp(EL1, haveSecurity && !scr.ns, asid);
1428 tlbiOp.broadcast(tc);
1429 return;
1430 }
1431 // VAAE1(IS) and VAALE1(IS) are the same because TLBs only store
1432 // entries from the last level of translation table walks
1433 // AArch64 TLB Invalidate by VA, All ASID, EL1
1434 case MISCREG_TLBI_VAAE1_Xt:
1435 case MISCREG_TLBI_VAALE1_Xt:
1436 {
1437 assert64(tc);
1438 scr = readMiscReg(MISCREG_SCR, tc);
1439
1440 TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns,
1441 static_cast<Addr>(bits(newVal, 43, 0)) << 12, false);
1442
1443 tlbiOp(tc);
1444 return;
1445 }
1446 // AArch64 TLB Invalidate by VA, All ASID, EL1, Inner Shareable
1447 case MISCREG_TLBI_VAAE1IS_Xt:
1448 case MISCREG_TLBI_VAALE1IS_Xt:
1449 {
1450 assert64(tc);
1451 scr = readMiscReg(MISCREG_SCR, tc);
1452
1453 TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns,
1454 static_cast<Addr>(bits(newVal, 43, 0)) << 12, false);
1455
1456 tlbiOp.broadcast(tc);
1457 return;
1458 }
1459 // AArch64 TLB Invalidate by Intermediate Physical Address,
1460 // Stage 2, EL1
1461 case MISCREG_TLBI_IPAS2E1_Xt:
1462 case MISCREG_TLBI_IPAS2LE1_Xt:
1463 {
1464 assert64(tc);
1465 scr = readMiscReg(MISCREG_SCR, tc);
1466
1467 TLBIIPA tlbiOp(EL1, haveSecurity && !scr.ns,
1468 static_cast<Addr>(bits(newVal, 35, 0)) << 12);
1469
1470 tlbiOp(tc);
1471 return;
1472 }
1473 // AArch64 TLB Invalidate by Intermediate Physical Address,
1474 // Stage 2, EL1, Inner Shareable
1475 case MISCREG_TLBI_IPAS2E1IS_Xt:
1476 case MISCREG_TLBI_IPAS2LE1IS_Xt:
1477 {
1478 assert64(tc);
1479 scr = readMiscReg(MISCREG_SCR, tc);
1480
1481 TLBIIPA tlbiOp(EL1, haveSecurity && !scr.ns,
1482 static_cast<Addr>(bits(newVal, 35, 0)) << 12);
1483
1484 tlbiOp.broadcast(tc);
1485 return;
1486 }
1487 case MISCREG_ACTLR:
1488 warn("Not doing anything for write of miscreg ACTLR\n");
1489 break;
1490
1491 case MISCREG_PMXEVTYPER_PMCCFILTR:
1492 case MISCREG_PMINTENSET_EL1 ... MISCREG_PMOVSSET_EL0:
1493 case MISCREG_PMEVCNTR0_EL0 ... MISCREG_PMEVTYPER5_EL0:
1494 case MISCREG_PMCR ... MISCREG_PMOVSSET:
1495 pmu->setMiscReg(misc_reg, newVal);
1496 break;
1497
1498
1499 case MISCREG_HSTR: // TJDBX, now redifined to be RES0
1500 {
1501 HSTR hstrMask = 0;
1502 hstrMask.tjdbx = 1;
1503 newVal &= ~((uint32_t) hstrMask);
1504 break;
1505 }
1506 case MISCREG_HCPTR:
1507 {
1508 // If a CP bit in NSACR is 0 then the corresponding bit in
1509 // HCPTR is RAO/WI. Same applies to NSASEDIS
1510 secure_lookup = haveSecurity &&
1511 inSecureState(readMiscRegNoEffect(MISCREG_SCR),
1512 readMiscRegNoEffect(MISCREG_CPSR));
1513 if (!secure_lookup) {
1514 MiscReg oldValue = readMiscRegNoEffect(MISCREG_HCPTR);
1515 MiscReg mask = (readMiscRegNoEffect(MISCREG_NSACR) ^ 0x7FFF) & 0xBFFF;
1516 newVal = (newVal & ~mask) | (oldValue & mask);
1517 }
1518 break;
1519 }
1520 case MISCREG_HDFAR: // alias for secure DFAR
1521 misc_reg = MISCREG_DFAR_S;
1522 break;
1523 case MISCREG_HIFAR: // alias for secure IFAR
1524 misc_reg = MISCREG_IFAR_S;
1525 break;
1526 case MISCREG_ATS1CPR:
1527 case MISCREG_ATS1CPW:
1528 case MISCREG_ATS1CUR:
1529 case MISCREG_ATS1CUW:
1530 case MISCREG_ATS12NSOPR:
1531 case MISCREG_ATS12NSOPW:
1532 case MISCREG_ATS12NSOUR:
1533 case MISCREG_ATS12NSOUW:
1534 case MISCREG_ATS1HR:
1535 case MISCREG_ATS1HW:
1536 {
1537 Request::Flags flags = 0;
1538 BaseTLB::Mode mode = BaseTLB::Read;
1539 TLB::ArmTranslationType tranType = TLB::NormalTran;
1540 Fault fault;
1541 switch(misc_reg) {
1542 case MISCREG_ATS1CPR:
1543 flags = TLB::MustBeOne;
1544 tranType = TLB::S1CTran;
1545 mode = BaseTLB::Read;
1546 break;
1547 case MISCREG_ATS1CPW:
1548 flags = TLB::MustBeOne;
1549 tranType = TLB::S1CTran;
1550 mode = BaseTLB::Write;
1551 break;
1552 case MISCREG_ATS1CUR:
1553 flags = TLB::MustBeOne | TLB::UserMode;
1554 tranType = TLB::S1CTran;
1555 mode = BaseTLB::Read;
1556 break;
1557 case MISCREG_ATS1CUW:
1558 flags = TLB::MustBeOne | TLB::UserMode;
1559 tranType = TLB::S1CTran;
1560 mode = BaseTLB::Write;
1561 break;
1562 case MISCREG_ATS12NSOPR:
1563 if (!haveSecurity)
1564 panic("Security Extensions required for ATS12NSOPR");
1565 flags = TLB::MustBeOne;
1566 tranType = TLB::S1S2NsTran;
1567 mode = BaseTLB::Read;
1568 break;
1569 case MISCREG_ATS12NSOPW:
1570 if (!haveSecurity)
1571 panic("Security Extensions required for ATS12NSOPW");
1572 flags = TLB::MustBeOne;
1573 tranType = TLB::S1S2NsTran;
1574 mode = BaseTLB::Write;
1575 break;
1576 case MISCREG_ATS12NSOUR:
1577 if (!haveSecurity)
1578 panic("Security Extensions required for ATS12NSOUR");
1579 flags = TLB::MustBeOne | TLB::UserMode;
1580 tranType = TLB::S1S2NsTran;
1581 mode = BaseTLB::Read;
1582 break;
1583 case MISCREG_ATS12NSOUW:
1584 if (!haveSecurity)
1585 panic("Security Extensions required for ATS12NSOUW");
1586 flags = TLB::MustBeOne | TLB::UserMode;
1587 tranType = TLB::S1S2NsTran;
1588 mode = BaseTLB::Write;
1589 break;
1590 case MISCREG_ATS1HR: // only really useful from secure mode.
1591 flags = TLB::MustBeOne;
1592 tranType = TLB::HypMode;
1593 mode = BaseTLB::Read;
1594 break;
1595 case MISCREG_ATS1HW:
1596 flags = TLB::MustBeOne;
1597 tranType = TLB::HypMode;
1598 mode = BaseTLB::Write;
1599 break;
1600 }
1601 // If we're in timing mode then doing the translation in
1602 // functional mode then we're slightly distorting performance
1603 // results obtained from simulations. The translation should be
1604 // done in the same mode the core is running in. NOTE: This
1605 // can't be an atomic translation because that causes problems
1606 // with unexpected atomic snoop requests.
1607 warn("Translating via MISCREG(%d) in functional mode! Fix Me!\n", misc_reg);
1608 Request req(0, val, 0, flags, Request::funcMasterId,
1609 tc->pcState().pc(), tc->contextId());
1610 fault = getDTBPtr(tc)->translateFunctional(
1611 &req, tc, mode, tranType);
1612 TTBCR ttbcr = readMiscRegNoEffect(MISCREG_TTBCR);
1613 HCR hcr = readMiscRegNoEffect(MISCREG_HCR);
1614
1615 MiscReg newVal;
1616 if (fault == NoFault) {
1617 Addr paddr = req.getPaddr();
1618 if (haveLPAE && (ttbcr.eae || tranType & TLB::HypMode ||
1619 ((tranType & TLB::S1S2NsTran) && hcr.vm) )) {
1620 newVal = (paddr & mask(39, 12)) |
1621 (getDTBPtr(tc)->getAttr());
1622 } else {
1623 newVal = (paddr & 0xfffff000) |
1624 (getDTBPtr(tc)->getAttr());
1625 }
1626 DPRINTF(MiscRegs,
1627 "MISCREG: Translated addr 0x%08x: PAR: 0x%08x\n",
1628 val, newVal);
1629 } else {
1630 ArmFault *armFault = static_cast<ArmFault *>(fault.get());
1631 armFault->update(tc);
1632 // Set fault bit and FSR
1633 FSR fsr = armFault->getFsr(tc);
1634
1635 newVal = ((fsr >> 9) & 1) << 11;
1636 if (newVal) {
1637 // LPAE - rearange fault status
1638 newVal |= ((fsr >> 0) & 0x3f) << 1;
1639 } else {
1640 // VMSA - rearange fault status
1641 newVal |= ((fsr >> 0) & 0xf) << 1;
1642 newVal |= ((fsr >> 10) & 0x1) << 5;
1643 newVal |= ((fsr >> 12) & 0x1) << 6;
1644 }
1645 newVal |= 0x1; // F bit
1646 newVal |= ((armFault->iss() >> 7) & 0x1) << 8;
1647 newVal |= armFault->isStage2() ? 0x200 : 0;
1648 DPRINTF(MiscRegs,
1649 "MISCREG: Translated addr 0x%08x fault fsr %#x: PAR: 0x%08x\n",
1650 val, fsr, newVal);
1651 }
1652 setMiscRegNoEffect(MISCREG_PAR, newVal);
1653 return;
1654 }
1655 case MISCREG_TTBCR:
1656 {
1657 TTBCR ttbcr = readMiscRegNoEffect(MISCREG_TTBCR);
1658 const uint32_t ones = (uint32_t)(-1);
1659 TTBCR ttbcrMask = 0;
1660 TTBCR ttbcrNew = newVal;
1661
1662 // ARM DDI 0406C.b, ARMv7-32
1663 ttbcrMask.n = ones; // T0SZ
1664 if (haveSecurity) {
1665 ttbcrMask.pd0 = ones;
1666 ttbcrMask.pd1 = ones;
1667 }
1668 ttbcrMask.epd0 = ones;
1669 ttbcrMask.irgn0 = ones;
1670 ttbcrMask.orgn0 = ones;
1671 ttbcrMask.sh0 = ones;
1672 ttbcrMask.ps = ones; // T1SZ
1673 ttbcrMask.a1 = ones;
1674 ttbcrMask.epd1 = ones;
1675 ttbcrMask.irgn1 = ones;
1676 ttbcrMask.orgn1 = ones;
1677 ttbcrMask.sh1 = ones;
1678 if (haveLPAE)
1679 ttbcrMask.eae = ones;
1680
1681 if (haveLPAE && ttbcrNew.eae) {
1682 newVal = newVal & ttbcrMask;
1683 } else {
1684 newVal = (newVal & ttbcrMask) | (ttbcr & (~ttbcrMask));
1685 }
1686 // Invalidate TLB MiscReg
1687 getITBPtr(tc)->invalidateMiscReg();
1688 getDTBPtr(tc)->invalidateMiscReg();
1689 break;
1690 }
1691 case MISCREG_TTBR0:
1692 case MISCREG_TTBR1:
1693 {
1694 TTBCR ttbcr = readMiscRegNoEffect(MISCREG_TTBCR);
1695 if (haveLPAE) {
1696 if (ttbcr.eae) {
1697 // ARMv7 bit 63-56, 47-40 reserved, UNK/SBZP
1698 // ARMv8 AArch32 bit 63-56 only
1699 uint64_t ttbrMask = mask(63,56) | mask(47,40);
1700 newVal = (newVal & (~ttbrMask));
1701 }
1702 }
1703 // Invalidate TLB MiscReg
1704 getITBPtr(tc)->invalidateMiscReg();
1705 getDTBPtr(tc)->invalidateMiscReg();
1706 break;
1707 }
1708 case MISCREG_SCTLR_EL1:
1709 case MISCREG_CONTEXTIDR:
1710 case MISCREG_PRRR:
1711 case MISCREG_NMRR:
1712 case MISCREG_MAIR0:
1713 case MISCREG_MAIR1:
1714 case MISCREG_DACR:
1715 case MISCREG_VTTBR:
1716 case MISCREG_SCR_EL3:
1717 case MISCREG_HCR_EL2:
1718 case MISCREG_TCR_EL1:
1719 case MISCREG_TCR_EL2:
1720 case MISCREG_TCR_EL3:
1721 case MISCREG_SCTLR_EL2:
1722 case MISCREG_SCTLR_EL3:
1723 case MISCREG_HSCTLR:
1724 case MISCREG_TTBR0_EL1:
1725 case MISCREG_TTBR1_EL1:
1726 case MISCREG_TTBR0_EL2:
1727 case MISCREG_TTBR0_EL3:
1728 getITBPtr(tc)->invalidateMiscReg();
1729 getDTBPtr(tc)->invalidateMiscReg();
1730 break;
1731 case MISCREG_NZCV:
1732 {
1733 CPSR cpsr = val;
1734
1735 tc->setCCReg(CCREG_NZ, cpsr.nz);
1736 tc->setCCReg(CCREG_C, cpsr.c);
1737 tc->setCCReg(CCREG_V, cpsr.v);
1738 }
1739 break;
1740 case MISCREG_DAIF:
1741 {
1742 CPSR cpsr = miscRegs[MISCREG_CPSR];
1743 cpsr.daif = (uint8_t) ((CPSR) newVal).daif;
1744 newVal = cpsr;
1745 misc_reg = MISCREG_CPSR;
1746 }
1747 break;
1748 case MISCREG_SP_EL0:
1749 tc->setIntReg(INTREG_SP0, newVal);
1750 break;
1751 case MISCREG_SP_EL1:
1752 tc->setIntReg(INTREG_SP1, newVal);
1753 break;
1754 case MISCREG_SP_EL2:
1755 tc->setIntReg(INTREG_SP2, newVal);
1756 break;
1757 case MISCREG_SPSEL:
1758 {
1759 CPSR cpsr = miscRegs[MISCREG_CPSR];
1760 cpsr.sp = (uint8_t) ((CPSR) newVal).sp;
1761 newVal = cpsr;
1762 misc_reg = MISCREG_CPSR;
1763 }
1764 break;
1765 case MISCREG_CURRENTEL:
1766 {
1767 CPSR cpsr = miscRegs[MISCREG_CPSR];
1768 cpsr.el = (uint8_t) ((CPSR) newVal).el;
1769 newVal = cpsr;
1770 misc_reg = MISCREG_CPSR;
1771 }
1772 break;
1773 case MISCREG_AT_S1E1R_Xt:
1774 case MISCREG_AT_S1E1W_Xt:
1775 case MISCREG_AT_S1E0R_Xt:
1776 case MISCREG_AT_S1E0W_Xt:
1777 case MISCREG_AT_S1E2R_Xt:
1778 case MISCREG_AT_S1E2W_Xt:
1779 case MISCREG_AT_S12E1R_Xt:
1780 case MISCREG_AT_S12E1W_Xt:
1781 case MISCREG_AT_S12E0R_Xt:
1782 case MISCREG_AT_S12E0W_Xt:
1783 case MISCREG_AT_S1E3R_Xt:
1784 case MISCREG_AT_S1E3W_Xt:
1785 {
1786 RequestPtr req = new Request;
1787 Request::Flags flags = 0;
1788 BaseTLB::Mode mode = BaseTLB::Read;
1789 TLB::ArmTranslationType tranType = TLB::NormalTran;
1790 Fault fault;
1791 switch(misc_reg) {
1792 case MISCREG_AT_S1E1R_Xt:
1793 flags = TLB::MustBeOne;
1794 tranType = TLB::S1E1Tran;
1795 mode = BaseTLB::Read;
1796 break;
1797 case MISCREG_AT_S1E1W_Xt:
1798 flags = TLB::MustBeOne;
1799 tranType = TLB::S1E1Tran;
1800 mode = BaseTLB::Write;
1801 break;
1802 case MISCREG_AT_S1E0R_Xt:
1803 flags = TLB::MustBeOne | TLB::UserMode;
1804 tranType = TLB::S1E0Tran;
1805 mode = BaseTLB::Read;
1806 break;
1807 case MISCREG_AT_S1E0W_Xt:
1808 flags = TLB::MustBeOne | TLB::UserMode;
1809 tranType = TLB::S1E0Tran;
1810 mode = BaseTLB::Write;
1811 break;
1812 case MISCREG_AT_S1E2R_Xt:
1813 flags = TLB::MustBeOne;
1814 tranType = TLB::S1E2Tran;
1815 mode = BaseTLB::Read;
1816 break;
1817 case MISCREG_AT_S1E2W_Xt:
1818 flags = TLB::MustBeOne;
1819 tranType = TLB::S1E2Tran;
1820 mode = BaseTLB::Write;
1821 break;
1822 case MISCREG_AT_S12E0R_Xt:
1823 flags = TLB::MustBeOne | TLB::UserMode;
1824 tranType = TLB::S12E0Tran;
1825 mode = BaseTLB::Read;
1826 break;
1827 case MISCREG_AT_S12E0W_Xt:
1828 flags = TLB::MustBeOne | TLB::UserMode;
1829 tranType = TLB::S12E0Tran;
1830 mode = BaseTLB::Write;
1831 break;
1832 case MISCREG_AT_S12E1R_Xt:
1833 flags = TLB::MustBeOne;
1834 tranType = TLB::S12E1Tran;
1835 mode = BaseTLB::Read;
1836 break;
1837 case MISCREG_AT_S12E1W_Xt:
1838 flags = TLB::MustBeOne;
1839 tranType = TLB::S12E1Tran;
1840 mode = BaseTLB::Write;
1841 break;
1842 case MISCREG_AT_S1E3R_Xt:
1843 flags = TLB::MustBeOne;
1844 tranType = TLB::S1E3Tran;
1845 mode = BaseTLB::Read;
1846 break;
1847 case MISCREG_AT_S1E3W_Xt:
1848 flags = TLB::MustBeOne;
1849 tranType = TLB::S1E3Tran;
1850 mode = BaseTLB::Write;
1851 break;
1852 }
1853 // If we're in timing mode then doing the translation in
1854 // functional mode then we're slightly distorting performance
1855 // results obtained from simulations. The translation should be
1856 // done in the same mode the core is running in. NOTE: This
1857 // can't be an atomic translation because that causes problems
1858 // with unexpected atomic snoop requests.
1859 warn("Translating via MISCREG(%d) in functional mode! Fix Me!\n", misc_reg);
1860 req->setVirt(0, val, 0, flags, Request::funcMasterId,
1861 tc->pcState().pc());
1862 req->setContext(tc->contextId());
1863 fault = getDTBPtr(tc)->translateFunctional(req, tc, mode,
1864 tranType);
1865
1866 MiscReg newVal;
1867 if (fault == NoFault) {
1868 Addr paddr = req->getPaddr();
1869 uint64_t attr = getDTBPtr(tc)->getAttr();
1870 uint64_t attr1 = attr >> 56;
1871 if (!attr1 || attr1 ==0x44) {
1872 attr |= 0x100;
1873 attr &= ~ uint64_t(0x80);
1874 }
1875 newVal = (paddr & mask(47, 12)) | attr;
1876 DPRINTF(MiscRegs,
1877 "MISCREG: Translated addr %#x: PAR_EL1: %#xx\n",
1878 val, newVal);
1879 } else {
1880 ArmFault *armFault = static_cast<ArmFault *>(fault.get());
1881 armFault->update(tc);
1882 // Set fault bit and FSR
1883 FSR fsr = armFault->getFsr(tc);
1884
1885 CPSR cpsr = tc->readMiscReg(MISCREG_CPSR);
1886 if (cpsr.width) { // AArch32
1887 newVal = ((fsr >> 9) & 1) << 11;
1888 // rearrange fault status
1889 newVal |= ((fsr >> 0) & 0x3f) << 1;
1890 newVal |= 0x1; // F bit
1891 newVal |= ((armFault->iss() >> 7) & 0x1) << 8;
1892 newVal |= armFault->isStage2() ? 0x200 : 0;
1893 } else { // AArch64
1894 newVal = 1; // F bit
1895 newVal |= fsr << 1; // FST
1896 // TODO: DDI 0487A.f D7-2083, AbortFault's s1ptw bit.
1897 newVal |= armFault->isStage2() ? 1 << 8 : 0; // PTW
1898 newVal |= armFault->isStage2() ? 1 << 9 : 0; // S
1899 newVal |= 1 << 11; // RES1
1900 }
1901 DPRINTF(MiscRegs,
1902 "MISCREG: Translated addr %#x fault fsr %#x: PAR: %#x\n",
1903 val, fsr, newVal);
1904 }
1905 delete req;
1906 setMiscRegNoEffect(MISCREG_PAR_EL1, newVal);
1907 return;
1908 }
1909 case MISCREG_SPSR_EL3:
1910 case MISCREG_SPSR_EL2:
1911 case MISCREG_SPSR_EL1:
1912 // Force bits 23:21 to 0
1913 newVal = val & ~(0x7 << 21);
1914 break;
1915 case MISCREG_L2CTLR:
1916 warn("miscreg L2CTLR (%s) written with %#x. ignored...\n",
1917 miscRegName[misc_reg], uint32_t(val));
1918 break;
1919
1920 // Generic Timer registers
1921 case MISCREG_CNTFRQ ... MISCREG_CNTHP_CTL:
1922 case MISCREG_CNTPCT ... MISCREG_CNTHP_CVAL:
1923 case MISCREG_CNTKCTL_EL1 ... MISCREG_CNTV_CVAL_EL0:
1924 case MISCREG_CNTVOFF_EL2 ... MISCREG_CNTPS_CVAL_EL1:
1925 getGenericTimer(tc).setMiscReg(misc_reg, newVal);
1926 break;
1927 }
1928 }
1929 setMiscRegNoEffect(misc_reg, newVal);
1930}
1931
1932BaseISADevice &
1933ISA::getGenericTimer(ThreadContext *tc)
1934{
1935 // We only need to create an ISA interface the first time we try
1936 // to access the timer.
1937 if (timer)
1938 return *timer.get();
1939
1940 assert(system);
1941 GenericTimer *generic_timer(system->getGenericTimer());
1942 if (!generic_timer) {
1943 panic("Trying to get a generic timer from a system that hasn't "
1944 "been configured to use a generic timer.\n");
1945 }
1946
1947 timer.reset(new GenericTimerISA(*generic_timer, tc->contextId()));
1948 return *timer.get();
1949}
1950
1951}
1952
1953ArmISA::ISA *
1954ArmISAParams::create()
1955{
1956 return new ArmISA::ISA(this);
1957}
757 case MISCREG_CPTR_EL2:
758 {
759 const uint32_t ones = (uint32_t)(-1);
760 CPTR cptrMask = 0;
761 cptrMask.tcpac = ones;
762 cptrMask.tta = ones;
763 cptrMask.tfp = ones;
764 newVal &= cptrMask;
765 cptrMask = 0;
766 cptrMask.res1_13_12_el2 = ones;
767 cptrMask.res1_9_0_el2 = ones;
768 newVal |= cptrMask;
769 DPRINTF(MiscRegs, "Writing misc reg %s: %#x\n",
770 miscRegName[misc_reg], newVal);
771 }
772 break;
773 case MISCREG_CPTR_EL3:
774 {
775 const uint32_t ones = (uint32_t)(-1);
776 CPTR cptrMask = 0;
777 cptrMask.tcpac = ones;
778 cptrMask.tta = ones;
779 cptrMask.tfp = ones;
780 newVal &= cptrMask;
781 DPRINTF(MiscRegs, "Writing misc reg %s: %#x\n",
782 miscRegName[misc_reg], newVal);
783 }
784 break;
785 case MISCREG_CSSELR:
786 warn_once("The csselr register isn't implemented.\n");
787 return;
788
789 case MISCREG_DC_ZVA_Xt:
790 warn("Calling DC ZVA! Not Implemeted! Expect WEIRD results\n");
791 return;
792
793 case MISCREG_FPSCR:
794 {
795 const uint32_t ones = (uint32_t)(-1);
796 FPSCR fpscrMask = 0;
797 fpscrMask.ioc = ones;
798 fpscrMask.dzc = ones;
799 fpscrMask.ofc = ones;
800 fpscrMask.ufc = ones;
801 fpscrMask.ixc = ones;
802 fpscrMask.idc = ones;
803 fpscrMask.ioe = ones;
804 fpscrMask.dze = ones;
805 fpscrMask.ofe = ones;
806 fpscrMask.ufe = ones;
807 fpscrMask.ixe = ones;
808 fpscrMask.ide = ones;
809 fpscrMask.len = ones;
810 fpscrMask.stride = ones;
811 fpscrMask.rMode = ones;
812 fpscrMask.fz = ones;
813 fpscrMask.dn = ones;
814 fpscrMask.ahp = ones;
815 fpscrMask.qc = ones;
816 fpscrMask.v = ones;
817 fpscrMask.c = ones;
818 fpscrMask.z = ones;
819 fpscrMask.n = ones;
820 newVal = (newVal & (uint32_t)fpscrMask) |
821 (readMiscRegNoEffect(MISCREG_FPSCR) &
822 ~(uint32_t)fpscrMask);
823 tc->getDecoderPtr()->setContext(newVal);
824 }
825 break;
826 case MISCREG_FPSR:
827 {
828 const uint32_t ones = (uint32_t)(-1);
829 FPSCR fpscrMask = 0;
830 fpscrMask.ioc = ones;
831 fpscrMask.dzc = ones;
832 fpscrMask.ofc = ones;
833 fpscrMask.ufc = ones;
834 fpscrMask.ixc = ones;
835 fpscrMask.idc = ones;
836 fpscrMask.qc = ones;
837 fpscrMask.v = ones;
838 fpscrMask.c = ones;
839 fpscrMask.z = ones;
840 fpscrMask.n = ones;
841 newVal = (newVal & (uint32_t)fpscrMask) |
842 (readMiscRegNoEffect(MISCREG_FPSCR) &
843 ~(uint32_t)fpscrMask);
844 misc_reg = MISCREG_FPSCR;
845 }
846 break;
847 case MISCREG_FPCR:
848 {
849 const uint32_t ones = (uint32_t)(-1);
850 FPSCR fpscrMask = 0;
851 fpscrMask.len = ones;
852 fpscrMask.stride = ones;
853 fpscrMask.rMode = ones;
854 fpscrMask.fz = ones;
855 fpscrMask.dn = ones;
856 fpscrMask.ahp = ones;
857 newVal = (newVal & (uint32_t)fpscrMask) |
858 (readMiscRegNoEffect(MISCREG_FPSCR) &
859 ~(uint32_t)fpscrMask);
860 misc_reg = MISCREG_FPSCR;
861 }
862 break;
863 case MISCREG_CPSR_Q:
864 {
865 assert(!(newVal & ~CpsrMaskQ));
866 newVal = readMiscRegNoEffect(MISCREG_CPSR) | newVal;
867 misc_reg = MISCREG_CPSR;
868 }
869 break;
870 case MISCREG_FPSCR_QC:
871 {
872 newVal = readMiscRegNoEffect(MISCREG_FPSCR) |
873 (newVal & FpscrQcMask);
874 misc_reg = MISCREG_FPSCR;
875 }
876 break;
877 case MISCREG_FPSCR_EXC:
878 {
879 newVal = readMiscRegNoEffect(MISCREG_FPSCR) |
880 (newVal & FpscrExcMask);
881 misc_reg = MISCREG_FPSCR;
882 }
883 break;
884 case MISCREG_FPEXC:
885 {
886 // vfpv3 architecture, section B.6.1 of DDI04068
887 // bit 29 - valid only if fpexc[31] is 0
888 const uint32_t fpexcMask = 0x60000000;
889 newVal = (newVal & fpexcMask) |
890 (readMiscRegNoEffect(MISCREG_FPEXC) & ~fpexcMask);
891 }
892 break;
893 case MISCREG_HCR:
894 {
895 if (!haveVirtualization)
896 return;
897 }
898 break;
899 case MISCREG_IFSR:
900 {
901 // ARM ARM (ARM DDI 0406C.b) B4.1.96
902 const uint32_t ifsrMask =
903 mask(31, 13) | mask(11, 11) | mask(8, 6);
904 newVal = newVal & ~ifsrMask;
905 }
906 break;
907 case MISCREG_DFSR:
908 {
909 // ARM ARM (ARM DDI 0406C.b) B4.1.52
910 const uint32_t dfsrMask = mask(31, 14) | mask(8, 8);
911 newVal = newVal & ~dfsrMask;
912 }
913 break;
914 case MISCREG_AMAIR0:
915 case MISCREG_AMAIR1:
916 {
917 // ARM ARM (ARM DDI 0406C.b) B4.1.5
918 // Valid only with LPAE
919 if (!haveLPAE)
920 return;
921 DPRINTF(MiscRegs, "Writing AMAIR: %#x\n", newVal);
922 }
923 break;
924 case MISCREG_SCR:
925 getITBPtr(tc)->invalidateMiscReg();
926 getDTBPtr(tc)->invalidateMiscReg();
927 break;
928 case MISCREG_SCTLR:
929 {
930 DPRINTF(MiscRegs, "Writing SCTLR: %#x\n", newVal);
931 scr = readMiscRegNoEffect(MISCREG_SCR);
932
933 MiscRegIndex sctlr_idx;
934 if (haveSecurity && !highestELIs64 && !scr.ns) {
935 sctlr_idx = MISCREG_SCTLR_S;
936 } else {
937 sctlr_idx = MISCREG_SCTLR_NS;
938 }
939
940 SCTLR sctlr = miscRegs[sctlr_idx];
941 SCTLR new_sctlr = newVal;
942 new_sctlr.nmfi = ((bool)sctlr.nmfi) && !haveVirtualization;
943 miscRegs[sctlr_idx] = (MiscReg)new_sctlr;
944 getITBPtr(tc)->invalidateMiscReg();
945 getDTBPtr(tc)->invalidateMiscReg();
946 }
947 case MISCREG_MIDR:
948 case MISCREG_ID_PFR0:
949 case MISCREG_ID_PFR1:
950 case MISCREG_ID_DFR0:
951 case MISCREG_ID_MMFR0:
952 case MISCREG_ID_MMFR1:
953 case MISCREG_ID_MMFR2:
954 case MISCREG_ID_MMFR3:
955 case MISCREG_ID_ISAR0:
956 case MISCREG_ID_ISAR1:
957 case MISCREG_ID_ISAR2:
958 case MISCREG_ID_ISAR3:
959 case MISCREG_ID_ISAR4:
960 case MISCREG_ID_ISAR5:
961
962 case MISCREG_MPIDR:
963 case MISCREG_FPSID:
964 case MISCREG_TLBTR:
965 case MISCREG_MVFR0:
966 case MISCREG_MVFR1:
967
968 case MISCREG_ID_AA64AFR0_EL1:
969 case MISCREG_ID_AA64AFR1_EL1:
970 case MISCREG_ID_AA64DFR0_EL1:
971 case MISCREG_ID_AA64DFR1_EL1:
972 case MISCREG_ID_AA64ISAR0_EL1:
973 case MISCREG_ID_AA64ISAR1_EL1:
974 case MISCREG_ID_AA64MMFR0_EL1:
975 case MISCREG_ID_AA64MMFR1_EL1:
976 case MISCREG_ID_AA64PFR0_EL1:
977 case MISCREG_ID_AA64PFR1_EL1:
978 // ID registers are constants.
979 return;
980
981 // TLB Invalidate All
982 case MISCREG_TLBIALL: // TLBI all entries, EL0&1,
983 {
984 assert32(tc);
985 scr = readMiscReg(MISCREG_SCR, tc);
986
987 TLBIALL tlbiOp(EL1, haveSecurity && !scr.ns);
988 tlbiOp(tc);
989 return;
990 }
991 // TLB Invalidate All, Inner Shareable
992 case MISCREG_TLBIALLIS:
993 {
994 assert32(tc);
995 scr = readMiscReg(MISCREG_SCR, tc);
996
997 TLBIALL tlbiOp(EL1, haveSecurity && !scr.ns);
998 tlbiOp.broadcast(tc);
999 return;
1000 }
1001 // Instruction TLB Invalidate All
1002 case MISCREG_ITLBIALL:
1003 {
1004 assert32(tc);
1005 scr = readMiscReg(MISCREG_SCR, tc);
1006
1007 ITLBIALL tlbiOp(EL1, haveSecurity && !scr.ns);
1008 tlbiOp(tc);
1009 return;
1010 }
1011 // Data TLB Invalidate All
1012 case MISCREG_DTLBIALL:
1013 {
1014 assert32(tc);
1015 scr = readMiscReg(MISCREG_SCR, tc);
1016
1017 DTLBIALL tlbiOp(EL1, haveSecurity && !scr.ns);
1018 tlbiOp(tc);
1019 return;
1020 }
1021 // TLB Invalidate by VA
1022 // mcr tlbimval(is) is invalidating all matching entries
1023 // regardless of the level of lookup, since in gem5 we cache
1024 // in the tlb the last level of lookup only.
1025 case MISCREG_TLBIMVA:
1026 case MISCREG_TLBIMVAL:
1027 {
1028 assert32(tc);
1029 scr = readMiscReg(MISCREG_SCR, tc);
1030
1031 TLBIMVA tlbiOp(EL1,
1032 haveSecurity && !scr.ns,
1033 mbits(newVal, 31, 12),
1034 bits(newVal, 7,0));
1035
1036 tlbiOp(tc);
1037 return;
1038 }
1039 // TLB Invalidate by VA, Inner Shareable
1040 case MISCREG_TLBIMVAIS:
1041 case MISCREG_TLBIMVALIS:
1042 {
1043 assert32(tc);
1044 scr = readMiscReg(MISCREG_SCR, tc);
1045
1046 TLBIMVA tlbiOp(EL1,
1047 haveSecurity && !scr.ns,
1048 mbits(newVal, 31, 12),
1049 bits(newVal, 7,0));
1050
1051 tlbiOp.broadcast(tc);
1052 return;
1053 }
1054 // TLB Invalidate by ASID match
1055 case MISCREG_TLBIASID:
1056 {
1057 assert32(tc);
1058 scr = readMiscReg(MISCREG_SCR, tc);
1059
1060 TLBIASID tlbiOp(EL1,
1061 haveSecurity && !scr.ns,
1062 bits(newVal, 7,0));
1063
1064 tlbiOp(tc);
1065 return;
1066 }
1067 // TLB Invalidate by ASID match, Inner Shareable
1068 case MISCREG_TLBIASIDIS:
1069 {
1070 assert32(tc);
1071 scr = readMiscReg(MISCREG_SCR, tc);
1072
1073 TLBIASID tlbiOp(EL1,
1074 haveSecurity && !scr.ns,
1075 bits(newVal, 7,0));
1076
1077 tlbiOp.broadcast(tc);
1078 return;
1079 }
1080 // mcr tlbimvaal(is) is invalidating all matching entries
1081 // regardless of the level of lookup, since in gem5 we cache
1082 // in the tlb the last level of lookup only.
1083 // TLB Invalidate by VA, All ASID
1084 case MISCREG_TLBIMVAA:
1085 case MISCREG_TLBIMVAAL:
1086 {
1087 assert32(tc);
1088 scr = readMiscReg(MISCREG_SCR, tc);
1089
1090 TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns,
1091 mbits(newVal, 31,12), false);
1092
1093 tlbiOp(tc);
1094 return;
1095 }
1096 // TLB Invalidate by VA, All ASID, Inner Shareable
1097 case MISCREG_TLBIMVAAIS:
1098 case MISCREG_TLBIMVAALIS:
1099 {
1100 assert32(tc);
1101 scr = readMiscReg(MISCREG_SCR, tc);
1102
1103 TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns,
1104 mbits(newVal, 31,12), false);
1105
1106 tlbiOp.broadcast(tc);
1107 return;
1108 }
1109 // mcr tlbimvalh(is) is invalidating all matching entries
1110 // regardless of the level of lookup, since in gem5 we cache
1111 // in the tlb the last level of lookup only.
1112 // TLB Invalidate by VA, Hyp mode
1113 case MISCREG_TLBIMVAH:
1114 case MISCREG_TLBIMVALH:
1115 {
1116 assert32(tc);
1117 scr = readMiscReg(MISCREG_SCR, tc);
1118
1119 TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns,
1120 mbits(newVal, 31,12), true);
1121
1122 tlbiOp(tc);
1123 return;
1124 }
1125 // TLB Invalidate by VA, Hyp mode, Inner Shareable
1126 case MISCREG_TLBIMVAHIS:
1127 case MISCREG_TLBIMVALHIS:
1128 {
1129 assert32(tc);
1130 scr = readMiscReg(MISCREG_SCR, tc);
1131
1132 TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns,
1133 mbits(newVal, 31,12), true);
1134
1135 tlbiOp.broadcast(tc);
1136 return;
1137 }
1138 // mcr tlbiipas2l(is) is invalidating all matching entries
1139 // regardless of the level of lookup, since in gem5 we cache
1140 // in the tlb the last level of lookup only.
1141 // TLB Invalidate by Intermediate Physical Address, Stage 2
1142 case MISCREG_TLBIIPAS2:
1143 case MISCREG_TLBIIPAS2L:
1144 {
1145 assert32(tc);
1146 scr = readMiscReg(MISCREG_SCR, tc);
1147
1148 TLBIIPA tlbiOp(EL1,
1149 haveSecurity && !scr.ns,
1150 static_cast<Addr>(bits(newVal, 35, 0)) << 12);
1151
1152 tlbiOp(tc);
1153 return;
1154 }
1155 // TLB Invalidate by Intermediate Physical Address, Stage 2,
1156 // Inner Shareable
1157 case MISCREG_TLBIIPAS2IS:
1158 case MISCREG_TLBIIPAS2LIS:
1159 {
1160 assert32(tc);
1161 scr = readMiscReg(MISCREG_SCR, tc);
1162
1163 TLBIIPA tlbiOp(EL1,
1164 haveSecurity && !scr.ns,
1165 static_cast<Addr>(bits(newVal, 35, 0)) << 12);
1166
1167 tlbiOp.broadcast(tc);
1168 return;
1169 }
1170 // Instruction TLB Invalidate by VA
1171 case MISCREG_ITLBIMVA:
1172 {
1173 assert32(tc);
1174 scr = readMiscReg(MISCREG_SCR, tc);
1175
1176 ITLBIMVA tlbiOp(EL1,
1177 haveSecurity && !scr.ns,
1178 mbits(newVal, 31, 12),
1179 bits(newVal, 7,0));
1180
1181 tlbiOp(tc);
1182 return;
1183 }
1184 // Data TLB Invalidate by VA
1185 case MISCREG_DTLBIMVA:
1186 {
1187 assert32(tc);
1188 scr = readMiscReg(MISCREG_SCR, tc);
1189
1190 DTLBIMVA tlbiOp(EL1,
1191 haveSecurity && !scr.ns,
1192 mbits(newVal, 31, 12),
1193 bits(newVal, 7,0));
1194
1195 tlbiOp(tc);
1196 return;
1197 }
1198 // Instruction TLB Invalidate by ASID match
1199 case MISCREG_ITLBIASID:
1200 {
1201 assert32(tc);
1202 scr = readMiscReg(MISCREG_SCR, tc);
1203
1204 ITLBIASID tlbiOp(EL1,
1205 haveSecurity && !scr.ns,
1206 bits(newVal, 7,0));
1207
1208 tlbiOp(tc);
1209 return;
1210 }
1211 // Data TLB Invalidate by ASID match
1212 case MISCREG_DTLBIASID:
1213 {
1214 assert32(tc);
1215 scr = readMiscReg(MISCREG_SCR, tc);
1216
1217 DTLBIASID tlbiOp(EL1,
1218 haveSecurity && !scr.ns,
1219 bits(newVal, 7,0));
1220
1221 tlbiOp(tc);
1222 return;
1223 }
1224 // TLB Invalidate All, Non-Secure Non-Hyp
1225 case MISCREG_TLBIALLNSNH:
1226 {
1227 assert32(tc);
1228
1229 TLBIALLN tlbiOp(EL1, false);
1230 tlbiOp(tc);
1231 return;
1232 }
1233 // TLB Invalidate All, Non-Secure Non-Hyp, Inner Shareable
1234 case MISCREG_TLBIALLNSNHIS:
1235 {
1236 assert32(tc);
1237
1238 TLBIALLN tlbiOp(EL1, false);
1239 tlbiOp.broadcast(tc);
1240 return;
1241 }
1242 // TLB Invalidate All, Hyp mode
1243 case MISCREG_TLBIALLH:
1244 {
1245 assert32(tc);
1246
1247 TLBIALLN tlbiOp(EL1, true);
1248 tlbiOp(tc);
1249 return;
1250 }
1251 // TLB Invalidate All, Hyp mode, Inner Shareable
1252 case MISCREG_TLBIALLHIS:
1253 {
1254 assert32(tc);
1255
1256 TLBIALLN tlbiOp(EL1, true);
1257 tlbiOp.broadcast(tc);
1258 return;
1259 }
1260 // AArch64 TLB Invalidate All, EL3
1261 case MISCREG_TLBI_ALLE3:
1262 {
1263 assert64(tc);
1264
1265 TLBIALL tlbiOp(EL3, true);
1266 tlbiOp(tc);
1267 return;
1268 }
1269 // AArch64 TLB Invalidate All, EL3, Inner Shareable
1270 case MISCREG_TLBI_ALLE3IS:
1271 {
1272 assert64(tc);
1273
1274 TLBIALL tlbiOp(EL3, true);
1275 tlbiOp.broadcast(tc);
1276 return;
1277 }
1278 // @todo: uncomment this to enable Virtualization
1279 // case MISCREG_TLBI_ALLE2IS:
1280 // case MISCREG_TLBI_ALLE2:
1281 // AArch64 TLB Invalidate All, EL1
1282 case MISCREG_TLBI_ALLE1:
1283 case MISCREG_TLBI_VMALLE1:
1284 case MISCREG_TLBI_VMALLS12E1:
1285 // @todo: handle VMID and stage 2 to enable Virtualization
1286 {
1287 assert64(tc);
1288 scr = readMiscReg(MISCREG_SCR, tc);
1289
1290 TLBIALL tlbiOp(EL1, haveSecurity && !scr.ns);
1291 tlbiOp(tc);
1292 return;
1293 }
1294 // AArch64 TLB Invalidate All, EL1, Inner Shareable
1295 case MISCREG_TLBI_ALLE1IS:
1296 case MISCREG_TLBI_VMALLE1IS:
1297 case MISCREG_TLBI_VMALLS12E1IS:
1298 // @todo: handle VMID and stage 2 to enable Virtualization
1299 {
1300 assert64(tc);
1301 scr = readMiscReg(MISCREG_SCR, tc);
1302
1303 TLBIALL tlbiOp(EL1, haveSecurity && !scr.ns);
1304 tlbiOp.broadcast(tc);
1305 return;
1306 }
1307 // VAEx(IS) and VALEx(IS) are the same because TLBs
1308 // only store entries
1309 // from the last level of translation table walks
1310 // @todo: handle VMID to enable Virtualization
1311 // AArch64 TLB Invalidate by VA, EL3
1312 case MISCREG_TLBI_VAE3_Xt:
1313 case MISCREG_TLBI_VALE3_Xt:
1314 {
1315 assert64(tc);
1316
1317 TLBIMVA tlbiOp(EL3, true,
1318 static_cast<Addr>(bits(newVal, 43, 0)) << 12,
1319 0xbeef);
1320 tlbiOp(tc);
1321 return;
1322 }
1323 // AArch64 TLB Invalidate by VA, EL3, Inner Shareable
1324 case MISCREG_TLBI_VAE3IS_Xt:
1325 case MISCREG_TLBI_VALE3IS_Xt:
1326 {
1327 assert64(tc);
1328
1329 TLBIMVA tlbiOp(EL3, true,
1330 static_cast<Addr>(bits(newVal, 43, 0)) << 12,
1331 0xbeef);
1332
1333 tlbiOp.broadcast(tc);
1334 return;
1335 }
1336 // AArch64 TLB Invalidate by VA, EL2
1337 case MISCREG_TLBI_VAE2_Xt:
1338 case MISCREG_TLBI_VALE2_Xt:
1339 {
1340 assert64(tc);
1341 scr = readMiscReg(MISCREG_SCR, tc);
1342
1343 TLBIMVA tlbiOp(EL2, haveSecurity && !scr.ns,
1344 static_cast<Addr>(bits(newVal, 43, 0)) << 12,
1345 0xbeef);
1346 tlbiOp(tc);
1347 return;
1348 }
1349 // AArch64 TLB Invalidate by VA, EL2, Inner Shareable
1350 case MISCREG_TLBI_VAE2IS_Xt:
1351 case MISCREG_TLBI_VALE2IS_Xt:
1352 {
1353 assert64(tc);
1354 scr = readMiscReg(MISCREG_SCR, tc);
1355
1356 TLBIMVA tlbiOp(EL2, haveSecurity && !scr.ns,
1357 static_cast<Addr>(bits(newVal, 43, 0)) << 12,
1358 0xbeef);
1359
1360 tlbiOp.broadcast(tc);
1361 return;
1362 }
1363 // AArch64 TLB Invalidate by VA, EL1
1364 case MISCREG_TLBI_VAE1_Xt:
1365 case MISCREG_TLBI_VALE1_Xt:
1366 {
1367 assert64(tc);
1368 scr = readMiscReg(MISCREG_SCR, tc);
1369 auto asid = haveLargeAsid64 ? bits(newVal, 63, 48) :
1370 bits(newVal, 55, 48);
1371
1372 TLBIMVA tlbiOp(EL1, haveSecurity && !scr.ns,
1373 static_cast<Addr>(bits(newVal, 43, 0)) << 12,
1374 asid);
1375
1376 tlbiOp(tc);
1377 return;
1378 }
1379 // AArch64 TLB Invalidate by VA, EL1, Inner Shareable
1380 case MISCREG_TLBI_VAE1IS_Xt:
1381 case MISCREG_TLBI_VALE1IS_Xt:
1382 {
1383 assert64(tc);
1384 scr = readMiscReg(MISCREG_SCR, tc);
1385 auto asid = haveLargeAsid64 ? bits(newVal, 63, 48) :
1386 bits(newVal, 55, 48);
1387
1388 TLBIMVA tlbiOp(EL1, haveSecurity && !scr.ns,
1389 static_cast<Addr>(bits(newVal, 43, 0)) << 12,
1390 asid);
1391
1392 tlbiOp.broadcast(tc);
1393 return;
1394 }
1395 // AArch64 TLB Invalidate by ASID, EL1
1396 // @todo: handle VMID to enable Virtualization
1397 case MISCREG_TLBI_ASIDE1_Xt:
1398 {
1399 assert64(tc);
1400 scr = readMiscReg(MISCREG_SCR, tc);
1401 auto asid = haveLargeAsid64 ? bits(newVal, 63, 48) :
1402 bits(newVal, 55, 48);
1403
1404 TLBIASID tlbiOp(EL1, haveSecurity && !scr.ns, asid);
1405 tlbiOp(tc);
1406 return;
1407 }
1408 // AArch64 TLB Invalidate by ASID, EL1, Inner Shareable
1409 case MISCREG_TLBI_ASIDE1IS_Xt:
1410 {
1411 assert64(tc);
1412 scr = readMiscReg(MISCREG_SCR, tc);
1413 auto asid = haveLargeAsid64 ? bits(newVal, 63, 48) :
1414 bits(newVal, 55, 48);
1415
1416 TLBIASID tlbiOp(EL1, haveSecurity && !scr.ns, asid);
1417 tlbiOp.broadcast(tc);
1418 return;
1419 }
1420 // VAAE1(IS) and VAALE1(IS) are the same because TLBs only store
1421 // entries from the last level of translation table walks
1422 // AArch64 TLB Invalidate by VA, All ASID, EL1
1423 case MISCREG_TLBI_VAAE1_Xt:
1424 case MISCREG_TLBI_VAALE1_Xt:
1425 {
1426 assert64(tc);
1427 scr = readMiscReg(MISCREG_SCR, tc);
1428
1429 TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns,
1430 static_cast<Addr>(bits(newVal, 43, 0)) << 12, false);
1431
1432 tlbiOp(tc);
1433 return;
1434 }
1435 // AArch64 TLB Invalidate by VA, All ASID, EL1, Inner Shareable
1436 case MISCREG_TLBI_VAAE1IS_Xt:
1437 case MISCREG_TLBI_VAALE1IS_Xt:
1438 {
1439 assert64(tc);
1440 scr = readMiscReg(MISCREG_SCR, tc);
1441
1442 TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns,
1443 static_cast<Addr>(bits(newVal, 43, 0)) << 12, false);
1444
1445 tlbiOp.broadcast(tc);
1446 return;
1447 }
1448 // AArch64 TLB Invalidate by Intermediate Physical Address,
1449 // Stage 2, EL1
1450 case MISCREG_TLBI_IPAS2E1_Xt:
1451 case MISCREG_TLBI_IPAS2LE1_Xt:
1452 {
1453 assert64(tc);
1454 scr = readMiscReg(MISCREG_SCR, tc);
1455
1456 TLBIIPA tlbiOp(EL1, haveSecurity && !scr.ns,
1457 static_cast<Addr>(bits(newVal, 35, 0)) << 12);
1458
1459 tlbiOp(tc);
1460 return;
1461 }
1462 // AArch64 TLB Invalidate by Intermediate Physical Address,
1463 // Stage 2, EL1, Inner Shareable
1464 case MISCREG_TLBI_IPAS2E1IS_Xt:
1465 case MISCREG_TLBI_IPAS2LE1IS_Xt:
1466 {
1467 assert64(tc);
1468 scr = readMiscReg(MISCREG_SCR, tc);
1469
1470 TLBIIPA tlbiOp(EL1, haveSecurity && !scr.ns,
1471 static_cast<Addr>(bits(newVal, 35, 0)) << 12);
1472
1473 tlbiOp.broadcast(tc);
1474 return;
1475 }
1476 case MISCREG_ACTLR:
1477 warn("Not doing anything for write of miscreg ACTLR\n");
1478 break;
1479
1480 case MISCREG_PMXEVTYPER_PMCCFILTR:
1481 case MISCREG_PMINTENSET_EL1 ... MISCREG_PMOVSSET_EL0:
1482 case MISCREG_PMEVCNTR0_EL0 ... MISCREG_PMEVTYPER5_EL0:
1483 case MISCREG_PMCR ... MISCREG_PMOVSSET:
1484 pmu->setMiscReg(misc_reg, newVal);
1485 break;
1486
1487
1488 case MISCREG_HSTR: // TJDBX, now redifined to be RES0
1489 {
1490 HSTR hstrMask = 0;
1491 hstrMask.tjdbx = 1;
1492 newVal &= ~((uint32_t) hstrMask);
1493 break;
1494 }
1495 case MISCREG_HCPTR:
1496 {
1497 // If a CP bit in NSACR is 0 then the corresponding bit in
1498 // HCPTR is RAO/WI. Same applies to NSASEDIS
1499 secure_lookup = haveSecurity &&
1500 inSecureState(readMiscRegNoEffect(MISCREG_SCR),
1501 readMiscRegNoEffect(MISCREG_CPSR));
1502 if (!secure_lookup) {
1503 MiscReg oldValue = readMiscRegNoEffect(MISCREG_HCPTR);
1504 MiscReg mask = (readMiscRegNoEffect(MISCREG_NSACR) ^ 0x7FFF) & 0xBFFF;
1505 newVal = (newVal & ~mask) | (oldValue & mask);
1506 }
1507 break;
1508 }
1509 case MISCREG_HDFAR: // alias for secure DFAR
1510 misc_reg = MISCREG_DFAR_S;
1511 break;
1512 case MISCREG_HIFAR: // alias for secure IFAR
1513 misc_reg = MISCREG_IFAR_S;
1514 break;
1515 case MISCREG_ATS1CPR:
1516 case MISCREG_ATS1CPW:
1517 case MISCREG_ATS1CUR:
1518 case MISCREG_ATS1CUW:
1519 case MISCREG_ATS12NSOPR:
1520 case MISCREG_ATS12NSOPW:
1521 case MISCREG_ATS12NSOUR:
1522 case MISCREG_ATS12NSOUW:
1523 case MISCREG_ATS1HR:
1524 case MISCREG_ATS1HW:
1525 {
1526 Request::Flags flags = 0;
1527 BaseTLB::Mode mode = BaseTLB::Read;
1528 TLB::ArmTranslationType tranType = TLB::NormalTran;
1529 Fault fault;
1530 switch(misc_reg) {
1531 case MISCREG_ATS1CPR:
1532 flags = TLB::MustBeOne;
1533 tranType = TLB::S1CTran;
1534 mode = BaseTLB::Read;
1535 break;
1536 case MISCREG_ATS1CPW:
1537 flags = TLB::MustBeOne;
1538 tranType = TLB::S1CTran;
1539 mode = BaseTLB::Write;
1540 break;
1541 case MISCREG_ATS1CUR:
1542 flags = TLB::MustBeOne | TLB::UserMode;
1543 tranType = TLB::S1CTran;
1544 mode = BaseTLB::Read;
1545 break;
1546 case MISCREG_ATS1CUW:
1547 flags = TLB::MustBeOne | TLB::UserMode;
1548 tranType = TLB::S1CTran;
1549 mode = BaseTLB::Write;
1550 break;
1551 case MISCREG_ATS12NSOPR:
1552 if (!haveSecurity)
1553 panic("Security Extensions required for ATS12NSOPR");
1554 flags = TLB::MustBeOne;
1555 tranType = TLB::S1S2NsTran;
1556 mode = BaseTLB::Read;
1557 break;
1558 case MISCREG_ATS12NSOPW:
1559 if (!haveSecurity)
1560 panic("Security Extensions required for ATS12NSOPW");
1561 flags = TLB::MustBeOne;
1562 tranType = TLB::S1S2NsTran;
1563 mode = BaseTLB::Write;
1564 break;
1565 case MISCREG_ATS12NSOUR:
1566 if (!haveSecurity)
1567 panic("Security Extensions required for ATS12NSOUR");
1568 flags = TLB::MustBeOne | TLB::UserMode;
1569 tranType = TLB::S1S2NsTran;
1570 mode = BaseTLB::Read;
1571 break;
1572 case MISCREG_ATS12NSOUW:
1573 if (!haveSecurity)
1574 panic("Security Extensions required for ATS12NSOUW");
1575 flags = TLB::MustBeOne | TLB::UserMode;
1576 tranType = TLB::S1S2NsTran;
1577 mode = BaseTLB::Write;
1578 break;
1579 case MISCREG_ATS1HR: // only really useful from secure mode.
1580 flags = TLB::MustBeOne;
1581 tranType = TLB::HypMode;
1582 mode = BaseTLB::Read;
1583 break;
1584 case MISCREG_ATS1HW:
1585 flags = TLB::MustBeOne;
1586 tranType = TLB::HypMode;
1587 mode = BaseTLB::Write;
1588 break;
1589 }
1590 // If we're in timing mode then doing the translation in
1591 // functional mode then we're slightly distorting performance
1592 // results obtained from simulations. The translation should be
1593 // done in the same mode the core is running in. NOTE: This
1594 // can't be an atomic translation because that causes problems
1595 // with unexpected atomic snoop requests.
1596 warn("Translating via MISCREG(%d) in functional mode! Fix Me!\n", misc_reg);
1597 Request req(0, val, 0, flags, Request::funcMasterId,
1598 tc->pcState().pc(), tc->contextId());
1599 fault = getDTBPtr(tc)->translateFunctional(
1600 &req, tc, mode, tranType);
1601 TTBCR ttbcr = readMiscRegNoEffect(MISCREG_TTBCR);
1602 HCR hcr = readMiscRegNoEffect(MISCREG_HCR);
1603
1604 MiscReg newVal;
1605 if (fault == NoFault) {
1606 Addr paddr = req.getPaddr();
1607 if (haveLPAE && (ttbcr.eae || tranType & TLB::HypMode ||
1608 ((tranType & TLB::S1S2NsTran) && hcr.vm) )) {
1609 newVal = (paddr & mask(39, 12)) |
1610 (getDTBPtr(tc)->getAttr());
1611 } else {
1612 newVal = (paddr & 0xfffff000) |
1613 (getDTBPtr(tc)->getAttr());
1614 }
1615 DPRINTF(MiscRegs,
1616 "MISCREG: Translated addr 0x%08x: PAR: 0x%08x\n",
1617 val, newVal);
1618 } else {
1619 ArmFault *armFault = static_cast<ArmFault *>(fault.get());
1620 armFault->update(tc);
1621 // Set fault bit and FSR
1622 FSR fsr = armFault->getFsr(tc);
1623
1624 newVal = ((fsr >> 9) & 1) << 11;
1625 if (newVal) {
1626 // LPAE - rearange fault status
1627 newVal |= ((fsr >> 0) & 0x3f) << 1;
1628 } else {
1629 // VMSA - rearange fault status
1630 newVal |= ((fsr >> 0) & 0xf) << 1;
1631 newVal |= ((fsr >> 10) & 0x1) << 5;
1632 newVal |= ((fsr >> 12) & 0x1) << 6;
1633 }
1634 newVal |= 0x1; // F bit
1635 newVal |= ((armFault->iss() >> 7) & 0x1) << 8;
1636 newVal |= armFault->isStage2() ? 0x200 : 0;
1637 DPRINTF(MiscRegs,
1638 "MISCREG: Translated addr 0x%08x fault fsr %#x: PAR: 0x%08x\n",
1639 val, fsr, newVal);
1640 }
1641 setMiscRegNoEffect(MISCREG_PAR, newVal);
1642 return;
1643 }
1644 case MISCREG_TTBCR:
1645 {
1646 TTBCR ttbcr = readMiscRegNoEffect(MISCREG_TTBCR);
1647 const uint32_t ones = (uint32_t)(-1);
1648 TTBCR ttbcrMask = 0;
1649 TTBCR ttbcrNew = newVal;
1650
1651 // ARM DDI 0406C.b, ARMv7-32
1652 ttbcrMask.n = ones; // T0SZ
1653 if (haveSecurity) {
1654 ttbcrMask.pd0 = ones;
1655 ttbcrMask.pd1 = ones;
1656 }
1657 ttbcrMask.epd0 = ones;
1658 ttbcrMask.irgn0 = ones;
1659 ttbcrMask.orgn0 = ones;
1660 ttbcrMask.sh0 = ones;
1661 ttbcrMask.ps = ones; // T1SZ
1662 ttbcrMask.a1 = ones;
1663 ttbcrMask.epd1 = ones;
1664 ttbcrMask.irgn1 = ones;
1665 ttbcrMask.orgn1 = ones;
1666 ttbcrMask.sh1 = ones;
1667 if (haveLPAE)
1668 ttbcrMask.eae = ones;
1669
1670 if (haveLPAE && ttbcrNew.eae) {
1671 newVal = newVal & ttbcrMask;
1672 } else {
1673 newVal = (newVal & ttbcrMask) | (ttbcr & (~ttbcrMask));
1674 }
1675 // Invalidate TLB MiscReg
1676 getITBPtr(tc)->invalidateMiscReg();
1677 getDTBPtr(tc)->invalidateMiscReg();
1678 break;
1679 }
1680 case MISCREG_TTBR0:
1681 case MISCREG_TTBR1:
1682 {
1683 TTBCR ttbcr = readMiscRegNoEffect(MISCREG_TTBCR);
1684 if (haveLPAE) {
1685 if (ttbcr.eae) {
1686 // ARMv7 bit 63-56, 47-40 reserved, UNK/SBZP
1687 // ARMv8 AArch32 bit 63-56 only
1688 uint64_t ttbrMask = mask(63,56) | mask(47,40);
1689 newVal = (newVal & (~ttbrMask));
1690 }
1691 }
1692 // Invalidate TLB MiscReg
1693 getITBPtr(tc)->invalidateMiscReg();
1694 getDTBPtr(tc)->invalidateMiscReg();
1695 break;
1696 }
1697 case MISCREG_SCTLR_EL1:
1698 case MISCREG_CONTEXTIDR:
1699 case MISCREG_PRRR:
1700 case MISCREG_NMRR:
1701 case MISCREG_MAIR0:
1702 case MISCREG_MAIR1:
1703 case MISCREG_DACR:
1704 case MISCREG_VTTBR:
1705 case MISCREG_SCR_EL3:
1706 case MISCREG_HCR_EL2:
1707 case MISCREG_TCR_EL1:
1708 case MISCREG_TCR_EL2:
1709 case MISCREG_TCR_EL3:
1710 case MISCREG_SCTLR_EL2:
1711 case MISCREG_SCTLR_EL3:
1712 case MISCREG_HSCTLR:
1713 case MISCREG_TTBR0_EL1:
1714 case MISCREG_TTBR1_EL1:
1715 case MISCREG_TTBR0_EL2:
1716 case MISCREG_TTBR0_EL3:
1717 getITBPtr(tc)->invalidateMiscReg();
1718 getDTBPtr(tc)->invalidateMiscReg();
1719 break;
1720 case MISCREG_NZCV:
1721 {
1722 CPSR cpsr = val;
1723
1724 tc->setCCReg(CCREG_NZ, cpsr.nz);
1725 tc->setCCReg(CCREG_C, cpsr.c);
1726 tc->setCCReg(CCREG_V, cpsr.v);
1727 }
1728 break;
1729 case MISCREG_DAIF:
1730 {
1731 CPSR cpsr = miscRegs[MISCREG_CPSR];
1732 cpsr.daif = (uint8_t) ((CPSR) newVal).daif;
1733 newVal = cpsr;
1734 misc_reg = MISCREG_CPSR;
1735 }
1736 break;
1737 case MISCREG_SP_EL0:
1738 tc->setIntReg(INTREG_SP0, newVal);
1739 break;
1740 case MISCREG_SP_EL1:
1741 tc->setIntReg(INTREG_SP1, newVal);
1742 break;
1743 case MISCREG_SP_EL2:
1744 tc->setIntReg(INTREG_SP2, newVal);
1745 break;
1746 case MISCREG_SPSEL:
1747 {
1748 CPSR cpsr = miscRegs[MISCREG_CPSR];
1749 cpsr.sp = (uint8_t) ((CPSR) newVal).sp;
1750 newVal = cpsr;
1751 misc_reg = MISCREG_CPSR;
1752 }
1753 break;
1754 case MISCREG_CURRENTEL:
1755 {
1756 CPSR cpsr = miscRegs[MISCREG_CPSR];
1757 cpsr.el = (uint8_t) ((CPSR) newVal).el;
1758 newVal = cpsr;
1759 misc_reg = MISCREG_CPSR;
1760 }
1761 break;
1762 case MISCREG_AT_S1E1R_Xt:
1763 case MISCREG_AT_S1E1W_Xt:
1764 case MISCREG_AT_S1E0R_Xt:
1765 case MISCREG_AT_S1E0W_Xt:
1766 case MISCREG_AT_S1E2R_Xt:
1767 case MISCREG_AT_S1E2W_Xt:
1768 case MISCREG_AT_S12E1R_Xt:
1769 case MISCREG_AT_S12E1W_Xt:
1770 case MISCREG_AT_S12E0R_Xt:
1771 case MISCREG_AT_S12E0W_Xt:
1772 case MISCREG_AT_S1E3R_Xt:
1773 case MISCREG_AT_S1E3W_Xt:
1774 {
1775 RequestPtr req = new Request;
1776 Request::Flags flags = 0;
1777 BaseTLB::Mode mode = BaseTLB::Read;
1778 TLB::ArmTranslationType tranType = TLB::NormalTran;
1779 Fault fault;
1780 switch(misc_reg) {
1781 case MISCREG_AT_S1E1R_Xt:
1782 flags = TLB::MustBeOne;
1783 tranType = TLB::S1E1Tran;
1784 mode = BaseTLB::Read;
1785 break;
1786 case MISCREG_AT_S1E1W_Xt:
1787 flags = TLB::MustBeOne;
1788 tranType = TLB::S1E1Tran;
1789 mode = BaseTLB::Write;
1790 break;
1791 case MISCREG_AT_S1E0R_Xt:
1792 flags = TLB::MustBeOne | TLB::UserMode;
1793 tranType = TLB::S1E0Tran;
1794 mode = BaseTLB::Read;
1795 break;
1796 case MISCREG_AT_S1E0W_Xt:
1797 flags = TLB::MustBeOne | TLB::UserMode;
1798 tranType = TLB::S1E0Tran;
1799 mode = BaseTLB::Write;
1800 break;
1801 case MISCREG_AT_S1E2R_Xt:
1802 flags = TLB::MustBeOne;
1803 tranType = TLB::S1E2Tran;
1804 mode = BaseTLB::Read;
1805 break;
1806 case MISCREG_AT_S1E2W_Xt:
1807 flags = TLB::MustBeOne;
1808 tranType = TLB::S1E2Tran;
1809 mode = BaseTLB::Write;
1810 break;
1811 case MISCREG_AT_S12E0R_Xt:
1812 flags = TLB::MustBeOne | TLB::UserMode;
1813 tranType = TLB::S12E0Tran;
1814 mode = BaseTLB::Read;
1815 break;
1816 case MISCREG_AT_S12E0W_Xt:
1817 flags = TLB::MustBeOne | TLB::UserMode;
1818 tranType = TLB::S12E0Tran;
1819 mode = BaseTLB::Write;
1820 break;
1821 case MISCREG_AT_S12E1R_Xt:
1822 flags = TLB::MustBeOne;
1823 tranType = TLB::S12E1Tran;
1824 mode = BaseTLB::Read;
1825 break;
1826 case MISCREG_AT_S12E1W_Xt:
1827 flags = TLB::MustBeOne;
1828 tranType = TLB::S12E1Tran;
1829 mode = BaseTLB::Write;
1830 break;
1831 case MISCREG_AT_S1E3R_Xt:
1832 flags = TLB::MustBeOne;
1833 tranType = TLB::S1E3Tran;
1834 mode = BaseTLB::Read;
1835 break;
1836 case MISCREG_AT_S1E3W_Xt:
1837 flags = TLB::MustBeOne;
1838 tranType = TLB::S1E3Tran;
1839 mode = BaseTLB::Write;
1840 break;
1841 }
1842 // If we're in timing mode then doing the translation in
1843 // functional mode then we're slightly distorting performance
1844 // results obtained from simulations. The translation should be
1845 // done in the same mode the core is running in. NOTE: This
1846 // can't be an atomic translation because that causes problems
1847 // with unexpected atomic snoop requests.
1848 warn("Translating via MISCREG(%d) in functional mode! Fix Me!\n", misc_reg);
1849 req->setVirt(0, val, 0, flags, Request::funcMasterId,
1850 tc->pcState().pc());
1851 req->setContext(tc->contextId());
1852 fault = getDTBPtr(tc)->translateFunctional(req, tc, mode,
1853 tranType);
1854
1855 MiscReg newVal;
1856 if (fault == NoFault) {
1857 Addr paddr = req->getPaddr();
1858 uint64_t attr = getDTBPtr(tc)->getAttr();
1859 uint64_t attr1 = attr >> 56;
1860 if (!attr1 || attr1 ==0x44) {
1861 attr |= 0x100;
1862 attr &= ~ uint64_t(0x80);
1863 }
1864 newVal = (paddr & mask(47, 12)) | attr;
1865 DPRINTF(MiscRegs,
1866 "MISCREG: Translated addr %#x: PAR_EL1: %#xx\n",
1867 val, newVal);
1868 } else {
1869 ArmFault *armFault = static_cast<ArmFault *>(fault.get());
1870 armFault->update(tc);
1871 // Set fault bit and FSR
1872 FSR fsr = armFault->getFsr(tc);
1873
1874 CPSR cpsr = tc->readMiscReg(MISCREG_CPSR);
1875 if (cpsr.width) { // AArch32
1876 newVal = ((fsr >> 9) & 1) << 11;
1877 // rearrange fault status
1878 newVal |= ((fsr >> 0) & 0x3f) << 1;
1879 newVal |= 0x1; // F bit
1880 newVal |= ((armFault->iss() >> 7) & 0x1) << 8;
1881 newVal |= armFault->isStage2() ? 0x200 : 0;
1882 } else { // AArch64
1883 newVal = 1; // F bit
1884 newVal |= fsr << 1; // FST
1885 // TODO: DDI 0487A.f D7-2083, AbortFault's s1ptw bit.
1886 newVal |= armFault->isStage2() ? 1 << 8 : 0; // PTW
1887 newVal |= armFault->isStage2() ? 1 << 9 : 0; // S
1888 newVal |= 1 << 11; // RES1
1889 }
1890 DPRINTF(MiscRegs,
1891 "MISCREG: Translated addr %#x fault fsr %#x: PAR: %#x\n",
1892 val, fsr, newVal);
1893 }
1894 delete req;
1895 setMiscRegNoEffect(MISCREG_PAR_EL1, newVal);
1896 return;
1897 }
1898 case MISCREG_SPSR_EL3:
1899 case MISCREG_SPSR_EL2:
1900 case MISCREG_SPSR_EL1:
1901 // Force bits 23:21 to 0
1902 newVal = val & ~(0x7 << 21);
1903 break;
1904 case MISCREG_L2CTLR:
1905 warn("miscreg L2CTLR (%s) written with %#x. ignored...\n",
1906 miscRegName[misc_reg], uint32_t(val));
1907 break;
1908
1909 // Generic Timer registers
1910 case MISCREG_CNTFRQ ... MISCREG_CNTHP_CTL:
1911 case MISCREG_CNTPCT ... MISCREG_CNTHP_CVAL:
1912 case MISCREG_CNTKCTL_EL1 ... MISCREG_CNTV_CVAL_EL0:
1913 case MISCREG_CNTVOFF_EL2 ... MISCREG_CNTPS_CVAL_EL1:
1914 getGenericTimer(tc).setMiscReg(misc_reg, newVal);
1915 break;
1916 }
1917 }
1918 setMiscRegNoEffect(misc_reg, newVal);
1919}
1920
1921BaseISADevice &
1922ISA::getGenericTimer(ThreadContext *tc)
1923{
1924 // We only need to create an ISA interface the first time we try
1925 // to access the timer.
1926 if (timer)
1927 return *timer.get();
1928
1929 assert(system);
1930 GenericTimer *generic_timer(system->getGenericTimer());
1931 if (!generic_timer) {
1932 panic("Trying to get a generic timer from a system that hasn't "
1933 "been configured to use a generic timer.\n");
1934 }
1935
1936 timer.reset(new GenericTimerISA(*generic_timer, tc->contextId()));
1937 return *timer.get();
1938}
1939
1940}
1941
1942ArmISA::ISA *
1943ArmISAParams::create()
1944{
1945 return new ArmISA::ISA(this);
1946}