tlb.cc revision 3826 
1/*
2 * Copyright (c) 2001-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Ali Saidi
29 */
30
31#include "arch/sparc/asi.hh"
32#include "arch/sparc/miscregfile.hh"
33#include "arch/sparc/tlb.hh"
34#include "base/bitfield.hh"
35#include "base/trace.hh"
36#include "cpu/thread_context.hh"
37#include "cpu/base.hh"
38#include "mem/packet_access.hh"
39#include "mem/request.hh"
40#include "sim/builder.hh"
41
42/* @todo remove some of the magic constants.  -- ali
43 * */
44namespace SparcISA
45{
46
47TLB::TLB(const std::string &name, int s)
48    : SimObject(name), size(s)
49{
50    // To make this work you'll have to change the hypervisor and OS
51    if (size > 64)
52        fatal("SPARC T1 TLB registers don't support more than 64 TLB entries.");
53
54    tlb = new TlbEntry[size];
55    memset(tlb, 0, sizeof(TlbEntry) * size);
56}
57
58void
59TLB::clearUsedBits()
60{
61    MapIter i;
62    for (i = lookupTable.begin(); i != lookupTable.end();) {
63        TlbEntry *t = i->second;
64        if (!t->pte.locked()) {
65            t->used = false;
66            usedEntries--;
67        }
68    }
69}
70
71
72void
73TLB::insert(Addr va, int partition_id, int context_id, bool real,
74        const PageTableEntry& PTE, int entry)
75{
76
77
78    MapIter i;
79    TlbEntry *new_entry = NULL;
80    int x;
81
82    DPRINTF(TLB, "TLB: Inserting TLB Entry; va=%#x pa=%#x pid=%d cid=%d r=%d\n",
83            va, PTE.paddr(), partition_id, context_id, (int)real);
84
85    if (entry != -1) {
86        assert(entry < size && entry >= 0);
87        new_entry = &tlb[entry];
88    } else {
89        for (x = 0; x < size; x++) {
90            if (!tlb[x].valid || !tlb[x].used)  {
91                new_entry = &tlb[x];
92                break;
93            }
94        }
95    }
96
97    // Update the last ently if their all locked
98    if (!new_entry)
99        new_entry = &tlb[size-1];
100
101    assert(PTE.valid());
102    new_entry->range.va = va;
103    new_entry->range.size = PTE.size();
104    new_entry->range.partitionId = partition_id;
105    new_entry->range.contextId = context_id;
106    new_entry->range.real = real;
107    new_entry->pte = PTE;
108    new_entry->used = true;;
109    new_entry->valid = true;
110    usedEntries++;
111
112
113    // Demap any entry that conflicts
114    i = lookupTable.find(new_entry->range);
115    if (i != lookupTable.end()) {
116        i->second->valid = false;
117        if (i->second->used) {
118            i->second->used = false;
119            usedEntries--;
120        }
121        DPRINTF(TLB, "TLB: Found conflicting entry, deleting it\n");
122        lookupTable.erase(i);
123    }
124
125    lookupTable.insert(new_entry->range, new_entry);;
126
127    // If all entries have there used bit set, clear it on them all, but the
128    // one we just inserted
129    if (usedEntries == size) {
130        clearUsedBits();
131        new_entry->used = true;
132        usedEntries++;
133    }
134
135}
136
137
138TlbEntry*
139TLB::lookup(Addr va, int partition_id, bool real, int context_id)
140{
141    MapIter i;
142    TlbRange tr;
143    TlbEntry *t;
144
145    DPRINTF(TLB, "TLB: Looking up entry va=%#x pid=%d cid=%d r=%d\n",
146            va, partition_id, context_id, real);
147    // Assemble full address structure
148    tr.va = va;
149    tr.size = va + MachineBytes;
150    tr.contextId = context_id;
151    tr.partitionId = partition_id;
152    tr.real = real;
153
154    // Try to find the entry
155    i = lookupTable.find(tr);
156    if (i == lookupTable.end()) {
157        DPRINTF(TLB, "TLB: No valid entry found\n");
158        return NULL;
159    }
160
161    // Mark the entries used bit and clear other used bits in needed
162    t = i->second;
163    DPRINTF(TLB, "TLB: Valid entry found pa: %#x size: %#x\n", t->pte.paddr(),
164            t->pte.size());
165    if (!t->used) {
166        t->used = true;
167        usedEntries++;
168        if (usedEntries == size) {
169            clearUsedBits();
170            t->used = true;
171            usedEntries++;
172        }
173    }
174
175    return t;
176}
177
178void
179TLB::dumpAll()
180{
181    for (int x = 0; x < size; x++) {
182        if (tlb[x].valid) {
183           DPRINTFN("%4d:  %#2x:%#2x %c %#4x %#8x %#8x %#16x\n",
184                   x, tlb[x].range.partitionId, tlb[x].range.contextId,
185                   tlb[x].range.real ? 'R' : ' ', tlb[x].range.size,
186                   tlb[x].range.va, tlb[x].pte.paddr(), tlb[x].pte());
187        }
188    }
189}
190
191void
192TLB::demapPage(Addr va, int partition_id, bool real, int context_id)
193{
194    TlbRange tr;
195    MapIter i;
196
197    // Assemble full address structure
198    tr.va = va;
199    tr.size = va + MachineBytes;
200    tr.contextId = context_id;
201    tr.partitionId = partition_id;
202    tr.real = real;
203
204    // Demap any entry that conflicts
205    i = lookupTable.find(tr);
206    if (i != lookupTable.end()) {
207        i->second->valid = false;
208        if (i->second->used) {
209            i->second->used = false;
210            usedEntries--;
211        }
212        lookupTable.erase(i);
213    }
214}
215
216void
217TLB::demapContext(int partition_id, int context_id)
218{
219    int x;
220    for (x = 0; x < size; x++) {
221        if (tlb[x].range.contextId == context_id &&
222            tlb[x].range.partitionId == partition_id) {
223            tlb[x].valid = false;
224            if (tlb[x].used) {
225                tlb[x].used = false;
226                usedEntries--;
227            }
228            lookupTable.erase(tlb[x].range);
229        }
230    }
231}
232
233void
234TLB::demapAll(int partition_id)
235{
236    int x;
237    for (x = 0; x < size; x++) {
238        if (!tlb[x].pte.locked() && tlb[x].range.partitionId == partition_id) {
239            tlb[x].valid = false;
240            if (tlb[x].used) {
241                tlb[x].used = false;
242                usedEntries--;
243            }
244            lookupTable.erase(tlb[x].range);
245        }
246    }
247}
248
249void
250TLB::invalidateAll()
251{
252    int x;
253    for (x = 0; x < size; x++) {
254        tlb[x].valid = false;
255    }
256    usedEntries = 0;
257}
258
259uint64_t
260TLB::TteRead(int entry) {
261    assert(entry < size);
262    return tlb[entry].pte();
263}
264
265uint64_t
266TLB::TagRead(int entry) {
267    assert(entry < size);
268    uint64_t tag;
269
270    tag = tlb[entry].range.contextId | tlb[entry].range.va |
271          (uint64_t)tlb[entry].range.partitionId << 61;
272    tag |= tlb[entry].range.real ? ULL(1) << 60 : 0;
273    tag |= (uint64_t)~tlb[entry].pte._size() << 56;
274    return tag;
275}
276
277bool
278TLB::validVirtualAddress(Addr va, bool am)
279{
280    if (am)
281        return true;
282    if (va >= StartVAddrHole && va <= EndVAddrHole)
283        return false;
284    return true;
285}
286
287void
288TLB::writeSfsr(ThreadContext *tc, int reg,  bool write, ContextType ct,
289        bool se, FaultTypes ft, int asi)
290{
291    uint64_t sfsr;
292    sfsr = tc->readMiscReg(reg);
293
294    if (sfsr & 0x1)
295        sfsr = 0x3;
296    else
297        sfsr = 1;
298
299    if (write)
300        sfsr |= 1 << 2;
301    sfsr |= ct << 4;
302    if (se)
303        sfsr |= 1 << 6;
304    sfsr |= ft << 7;
305    sfsr |= asi << 16;
306    tc->setMiscRegWithEffect(reg, sfsr);
307}
308
309void
310TLB::writeTagAccess(ThreadContext *tc, int reg, Addr va, int context)
311{
312    tc->setMiscRegWithEffect(reg, mbits(va, 63,13) | mbits(context,12,0));
313}
314
315void
316ITB::writeSfsr(ThreadContext *tc, bool write, ContextType ct,
317        bool se, FaultTypes ft, int asi)
318{
319    DPRINTF(TLB, "TLB: ITB Fault:  w=%d ct=%d ft=%d asi=%d\n",
320             (int)write, ct, ft, asi);
321    TLB::writeSfsr(tc, MISCREG_MMU_ITLB_SFSR, write, ct, se, ft, asi);
322}
323
324void
325ITB::writeTagAccess(ThreadContext *tc, Addr va, int context)
326{
327    TLB::writeTagAccess(tc, MISCREG_MMU_ITLB_TAG_ACCESS, va, context);
328}
329
330void
331DTB::writeSfr(ThreadContext *tc, Addr a, bool write, ContextType ct,
332        bool se, FaultTypes ft, int asi)
333{
334    DPRINTF(TLB, "TLB: DTB Fault: A=%#x w=%d ct=%d ft=%d asi=%d\n",
335            a, (int)write, ct, ft, asi);
336    TLB::writeSfsr(tc, MISCREG_MMU_DTLB_SFSR, write, ct, se, ft, asi);
337    tc->setMiscRegWithEffect(MISCREG_MMU_DTLB_SFAR, a);
338}
339
340    void
341DTB::writeTagAccess(ThreadContext *tc, Addr va, int context)
342{
343    TLB::writeTagAccess(tc, MISCREG_MMU_DTLB_TAG_ACCESS, va, context);
344}
345
346
347
348Fault
349ITB::translate(RequestPtr &req, ThreadContext *tc)
350{
351    uint64_t hpstate = tc->readMiscReg(MISCREG_HPSTATE);
352    uint64_t pstate = tc->readMiscReg(MISCREG_PSTATE);
353    bool lsuIm = tc->readMiscReg(MISCREG_MMU_LSU_CTRL) >> 2 & 0x1;
354    uint64_t tl = tc->readMiscReg(MISCREG_TL);
355    uint64_t part_id = tc->readMiscReg(MISCREG_MMU_PART_ID);
356    bool addr_mask = pstate >> 3 & 0x1;
357    bool priv = pstate >> 2 & 0x1;
358    Addr vaddr = req->getVaddr();
359    int context;
360    ContextType ct;
361    int asi;
362    bool real = false;
363    TlbEntry *e;
364
365    DPRINTF(TLB, "TLB: ITB Request to translate va=%#x size=%d\n",
366            vaddr, req->getSize());
367    DPRINTF(TLB, "TLB: pstate: %#X hpstate: %#X lsudm: %#X part_id: %#X\n",
368           pstate, hpstate, lsuIm, part_id);
369
370    assert(req->getAsi() == ASI_IMPLICIT);
371
372    if (tl > 0) {
373        asi = ASI_N;
374        ct = Nucleus;
375        context = 0;
376    } else {
377        asi = ASI_P;
378        ct = Primary;
379        context = tc->readMiscReg(MISCREG_MMU_P_CONTEXT);
380    }
381
382    if ( hpstate >> 2 & 0x1 || hpstate >> 5 & 0x1 ) {
383        req->setPaddr(req->getVaddr() & PAddrImplMask);
384        return NoFault;
385    }
386
387    // If the asi is unaligned trap
388    if (vaddr & req->getSize()-1) {
389        writeSfsr(tc, false, ct, false, OtherFault, asi);
390        return new MemAddressNotAligned;
391    }
392
393    if (addr_mask)
394        vaddr = vaddr & VAddrAMask;
395
396    if (!validVirtualAddress(vaddr, addr_mask)) {
397        writeSfsr(tc, false, ct, false, VaOutOfRange, asi);
398        return new InstructionAccessException;
399    }
400
401    if (!lsuIm) {
402        e = lookup(req->getVaddr(), part_id, true);
403        real = true;
404        context = 0;
405    } else {
406        e = lookup(vaddr, part_id, false, context);
407    }
408
409    if (e == NULL || !e->valid) {
410        tc->setMiscReg(MISCREG_MMU_ITLB_TAG_ACCESS,
411                vaddr & ~BytesInPageMask | context);
412        if (real)
413            return new InstructionRealTranslationMiss;
414        else
415            return new FastInstructionAccessMMUMiss;
416    }
417
418    // were not priviledged accesing priv page
419    if (!priv && e->pte.priv()) {
420        writeSfsr(tc, false, ct, false, PrivViolation, asi);
421        return new InstructionAccessException;
422    }
423
424    req->setPaddr(e->pte.paddr() & ~(e->pte.size()-1) |
425                  req->getVaddr() & e->pte.size()-1 );
426    DPRINTF(TLB, "TLB: %#X -> %#X\n", req->getVaddr(), req->getPaddr());
427    return NoFault;
428}
429
430
431
432Fault
433DTB::translate(RequestPtr &req, ThreadContext *tc, bool write)
434{
435    /* @todo this could really use some profiling and fixing to make it faster! */
436    uint64_t hpstate = tc->readMiscReg(MISCREG_HPSTATE);
437    uint64_t pstate = tc->readMiscReg(MISCREG_PSTATE);
438    bool lsuDm = tc->readMiscReg(MISCREG_MMU_LSU_CTRL) >> 3 & 0x1;
439    uint64_t tl = tc->readMiscReg(MISCREG_TL);
440    uint64_t part_id = tc->readMiscReg(MISCREG_MMU_PART_ID);
441    bool hpriv = hpstate >> 2 & 0x1;
442    bool red = hpstate >> 5 >> 0x1;
443    bool addr_mask = pstate >> 3 & 0x1;
444    bool priv = pstate >> 2 & 0x1;
445    bool implicit = false;
446    bool real = false;
447    Addr vaddr = req->getVaddr();
448    Addr size = req->getSize();
449    ContextType ct;
450    int context;
451    ASI asi;
452
453    TlbEntry *e;
454
455    asi = (ASI)req->getAsi();
456    DPRINTF(TLB, "TLB: DTB Request to translate va=%#x size=%d asi=%#x\n",
457            vaddr, size, asi);
458    DPRINTF(TLB, "TLB: pstate: %#X hpstate: %#X lsudm: %#X part_id: %#X\n",
459           pstate, hpstate, lsuDm, part_id);
460    if (asi == ASI_IMPLICIT)
461        implicit = true;
462
463    if (implicit) {
464        if (tl > 0) {
465            asi = ASI_N;
466            ct = Nucleus;
467            context = 0;
468        } else {
469            asi = ASI_P;
470            ct = Primary;
471            context = tc->readMiscReg(MISCREG_MMU_P_CONTEXT);
472        }
473    } else if (!hpriv && !red) {
474        if (tl > 0 || AsiIsNucleus(asi)) {
475            ct = Nucleus;
476            context = 0;
477        } else if (AsiIsSecondary(asi)) {
478            ct = Secondary;
479            context = tc->readMiscReg(MISCREG_MMU_S_CONTEXT);
480        } else {
481            context = tc->readMiscReg(MISCREG_MMU_P_CONTEXT);
482            ct = Primary; //???
483        }
484
485        // We need to check for priv level/asi priv
486        if (!priv && !AsiIsUnPriv(asi)) {
487            // It appears that context should be Nucleus in these cases?
488            writeSfr(tc, vaddr, write, Nucleus, false, IllegalAsi, asi);
489            return new PrivilegedAction;
490        }
491        if (priv && AsiIsHPriv(asi)) {
492            writeSfr(tc, vaddr, write, Nucleus, false, IllegalAsi, asi);
493            return new DataAccessException;
494        }
495
496    } else if (hpriv) {
497        if (asi == ASI_P) {
498            ct = Primary;
499            context = tc->readMiscReg(MISCREG_MMU_P_CONTEXT);
500            goto continueDtbFlow;
501        }
502    }
503
504    if (!implicit) {
505        if (AsiIsLittle(asi))
506            panic("Little Endian ASIs not supported\n");
507        if (AsiIsBlock(asi))
508            panic("Block ASIs not supported\n");
509        if (AsiIsNoFault(asi))
510            panic("No Fault ASIs not supported\n");
511        if (AsiIsTwin(asi))
512            panic("Twin ASIs not supported\n");
513        if (AsiIsPartialStore(asi))
514            panic("Partial Store ASIs not supported\n");
515        if (AsiIsInterrupt(asi))
516            panic("Interrupt ASIs not supported\n");
517
518        if (AsiIsMmu(asi))
519            goto handleMmuRegAccess;
520        if (AsiIsScratchPad(asi))
521            goto handleScratchRegAccess;
522        if (AsiIsQueue(asi))
523            goto handleQueueRegAccess;
524        if (AsiIsSparcError(asi))
525            goto handleSparcErrorRegAccess;
526
527        if (!AsiIsReal(asi) && !AsiIsNucleus(asi))
528            panic("Accessing ASI %#X. Should we?\n", asi);
529    }
530
531continueDtbFlow:
532    // If the asi is unaligned trap
533    if (vaddr & size-1) {
534        writeSfr(tc, vaddr, false, ct, false, OtherFault, asi);
535        return new MemAddressNotAligned;
536    }
537
538    if (addr_mask)
539        vaddr = vaddr & VAddrAMask;
540
541    if (!validVirtualAddress(vaddr, addr_mask)) {
542        writeSfr(tc, vaddr, false, ct, true, VaOutOfRange, asi);
543        return new DataAccessException;
544    }
545
546
547    if ((!lsuDm && !hpriv) || AsiIsReal(asi)) {
548        real = true;
549        context = 0;
550    };
551
552    if (hpriv && (implicit || (!AsiIsAsIfUser(asi) && !AsiIsReal(asi)))) {
553        req->setPaddr(req->getVaddr() & PAddrImplMask);
554        return NoFault;
555    }
556
557    e = lookup(req->getVaddr(), part_id, real, context);
558
559    if (e == NULL || !e->valid) {
560        tc->setMiscReg(MISCREG_MMU_DTLB_TAG_ACCESS,
561                vaddr & ~BytesInPageMask | context);
562        DPRINTF(TLB, "TLB: DTB Failed to find matching TLB entry\n");
563        if (real)
564            return new DataRealTranslationMiss;
565        else
566            return new FastDataAccessMMUMiss;
567
568    }
569
570
571    if (write && !e->pte.writable()) {
572        writeSfr(tc, vaddr, write, ct, e->pte.sideffect(), OtherFault, asi);
573        return new FastDataAccessProtection;
574    }
575
576    if (e->pte.nofault() && !AsiIsNoFault(asi)) {
577        writeSfr(tc, vaddr, write, ct, e->pte.sideffect(), LoadFromNfo, asi);
578        return new DataAccessException;
579    }
580
581    if (e->pte.sideffect())
582        req->setFlags(req->getFlags() | UNCACHEABLE);
583
584
585    if (!priv && e->pte.priv()) {
586        writeSfr(tc, vaddr, write, ct, e->pte.sideffect(), PrivViolation, asi);
587        return new DataAccessException;
588    }
589
590    req->setPaddr(e->pte.paddr() & ~(e->pte.size()-1) |
591                  req->getVaddr() & e->pte.size()-1);
592    DPRINTF(TLB, "TLB: %#X -> %#X\n", req->getVaddr(), req->getPaddr());
593    return NoFault;
594    /** Normal flow ends here. */
595
596handleScratchRegAccess:
597    if (vaddr > 0x38 || (vaddr >= 0x20 && vaddr < 0x30 && !hpriv)) {
598        writeSfr(tc, vaddr, write, Primary, true, IllegalAsi, asi);
599        return new DataAccessException;
600    }
601    goto regAccessOk;
602
603handleQueueRegAccess:
604    if (!priv  && !hpriv) {
605        writeSfr(tc, vaddr, write, Primary, true, IllegalAsi, asi);
606        return new PrivilegedAction;
607    }
608    if (priv && vaddr & 0xF || vaddr > 0x3f8 || vaddr < 0x3c0) {
609        writeSfr(tc, vaddr, write, Primary, true, IllegalAsi, asi);
610        return new DataAccessException;
611    }
612    goto regAccessOk;
613
614handleSparcErrorRegAccess:
615    if (!hpriv) {
616        if (priv) {
617            writeSfr(tc, vaddr, write, Primary, true, IllegalAsi, asi);
618            return new DataAccessException;
619        } else {
620            writeSfr(tc, vaddr, write, Primary, true, IllegalAsi, asi);
621            return new PrivilegedAction;
622        }
623    }
624    goto regAccessOk;
625
626
627regAccessOk:
628handleMmuRegAccess:
629    DPRINTF(TLB, "TLB: DTB Translating MM IPR access\n");
630    req->setMmapedIpr(true);
631    req->setPaddr(req->getVaddr());
632    return NoFault;
633};
634
635Tick
636DTB::doMmuRegRead(ThreadContext *tc, Packet *pkt)
637{
638    Addr va = pkt->getAddr();
639    ASI asi = (ASI)pkt->req->getAsi();
640
641    DPRINTF(IPR, "Memory Mapped IPR Read: asi=%#X a=%#x\n",
642         (uint32_t)pkt->req->getAsi(), pkt->getAddr());
643
644    switch (asi) {
645      case ASI_LSU_CONTROL_REG:
646        assert(va == 0);
647        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_LSU_CTRL));
648        break;
649      case ASI_MMU:
650        switch (va) {
651          case 0x8:
652            pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_P_CONTEXT));
653            break;
654          case 0x10:
655            pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_S_CONTEXT));
656            break;
657          default:
658            goto doMmuReadError;
659        }
660        break;
661      case ASI_QUEUE:
662        pkt->set(tc->readMiscRegWithEffect(MISCREG_QUEUE_CPU_MONDO_HEAD +
663                    (va >> 4) - 0x3c));
664        break;
665      case ASI_DMMU_CTXT_ZERO_TSB_BASE_PS0:
666        assert(va == 0);
667        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_C0_TSB_PS0));
668        break;
669      case ASI_DMMU_CTXT_ZERO_TSB_BASE_PS1:
670        assert(va == 0);
671        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_C0_TSB_PS1));
672        break;
673      case ASI_DMMU_CTXT_ZERO_CONFIG:
674        assert(va == 0);
675        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_C0_CONFIG));
676        break;
677      case ASI_IMMU_CTXT_ZERO_TSB_BASE_PS0:
678        assert(va == 0);
679        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_C0_TSB_PS0));
680        break;
681      case ASI_IMMU_CTXT_ZERO_TSB_BASE_PS1:
682        assert(va == 0);
683        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_C0_TSB_PS1));
684        break;
685      case ASI_IMMU_CTXT_ZERO_CONFIG:
686        assert(va == 0);
687        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_C0_CONFIG));
688        break;
689      case ASI_DMMU_CTXT_NONZERO_TSB_BASE_PS0:
690        assert(va == 0);
691        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_CX_TSB_PS0));
692        break;
693      case ASI_DMMU_CTXT_NONZERO_TSB_BASE_PS1:
694        assert(va == 0);
695        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_CX_TSB_PS1));
696        break;
697      case ASI_DMMU_CTXT_NONZERO_CONFIG:
698        assert(va == 0);
699        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_CX_CONFIG));
700        break;
701      case ASI_IMMU_CTXT_NONZERO_TSB_BASE_PS0:
702        assert(va == 0);
703        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_CX_TSB_PS0));
704        break;
705      case ASI_IMMU_CTXT_NONZERO_TSB_BASE_PS1:
706        assert(va == 0);
707        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_CX_TSB_PS1));
708        break;
709      case ASI_IMMU_CTXT_NONZERO_CONFIG:
710        assert(va == 0);
711        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_CX_CONFIG));
712        break;
713      case ASI_SPARC_ERROR_STATUS_REG:
714        warn("returning 0 for  SPARC ERROR regsiter read\n");
715        pkt->set(0);
716        break;
717      case ASI_HYP_SCRATCHPAD:
718      case ASI_SCRATCHPAD:
719        pkt->set(tc->readMiscRegWithEffect(MISCREG_SCRATCHPAD_R0 + (va >> 3)));
720        break;
721      case ASI_IMMU:
722        switch (va) {
723          case 0x30:
724            pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_TAG_ACCESS));
725            break;
726          default:
727            goto doMmuReadError;
728        }
729        break;
730      case ASI_DMMU:
731        switch (va) {
732          case 0x30:
733            pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_TAG_ACCESS));
734            break;
735          case 0x80:
736            pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_PART_ID));
737            break;
738          default:
739                goto doMmuReadError;
740        }
741        break;
742      default:
743doMmuReadError:
744        panic("need to impl DTB::doMmuRegRead() got asi=%#x, va=%#x\n",
745            (uint32_t)asi, va);
746    }
747    pkt->result = Packet::Success;
748    return tc->getCpuPtr()->cycles(1);
749}
750
751Tick
752DTB::doMmuRegWrite(ThreadContext *tc, Packet *pkt)
753{
754    uint64_t data = gtoh(pkt->get<uint64_t>());
755    Addr va = pkt->getAddr();
756    ASI asi = (ASI)pkt->req->getAsi();
757
758    Addr ta_insert;
759    Addr va_insert;
760    Addr ct_insert;
761    int part_insert;
762    int entry_insert = -1;
763    bool real_insert;
764    PageTableEntry pte;
765
766    DPRINTF(IPR, "Memory Mapped IPR Write: asi=%#X a=%#x d=%#X\n",
767         (uint32_t)asi, va, data);
768
769    switch (asi) {
770      case ASI_LSU_CONTROL_REG:
771        assert(va == 0);
772        tc->setMiscRegWithEffect(MISCREG_MMU_LSU_CTRL, data);
773        break;
774      case ASI_MMU:
775        switch (va) {
776          case 0x8:
777            tc->setMiscRegWithEffect(MISCREG_MMU_P_CONTEXT, data);
778            break;
779          case 0x10:
780            tc->setMiscRegWithEffect(MISCREG_MMU_S_CONTEXT, data);
781            break;
782          default:
783            goto doMmuWriteError;
784        }
785        break;
786      case ASI_QUEUE:
787        assert(mbits(data,13,6) == data);
788        tc->setMiscRegWithEffect(MISCREG_QUEUE_CPU_MONDO_HEAD +
789                    (va >> 4) - 0x3c, data);
790        break;
791      case ASI_DMMU_CTXT_ZERO_TSB_BASE_PS0:
792        assert(va == 0);
793        tc->setMiscRegWithEffect(MISCREG_MMU_DTLB_C0_TSB_PS0, data);
794        break;
795      case ASI_DMMU_CTXT_ZERO_TSB_BASE_PS1:
796        assert(va == 0);
797        tc->setMiscRegWithEffect(MISCREG_MMU_DTLB_C0_TSB_PS1, data);
798        break;
799      case ASI_DMMU_CTXT_ZERO_CONFIG:
800        assert(va == 0);
801        tc->setMiscRegWithEffect(MISCREG_MMU_DTLB_C0_CONFIG, data);
802        break;
803      case ASI_IMMU_CTXT_ZERO_TSB_BASE_PS0:
804        assert(va == 0);
805        tc->setMiscRegWithEffect(MISCREG_MMU_ITLB_C0_TSB_PS0, data);
806        break;
807      case ASI_IMMU_CTXT_ZERO_TSB_BASE_PS1:
808        assert(va == 0);
809        tc->setMiscRegWithEffect(MISCREG_MMU_ITLB_C0_TSB_PS1, data);
810        break;
811      case ASI_IMMU_CTXT_ZERO_CONFIG:
812        assert(va == 0);
813        tc->setMiscRegWithEffect(MISCREG_MMU_ITLB_C0_CONFIG, data);
814        break;
815      case ASI_DMMU_CTXT_NONZERO_TSB_BASE_PS0:
816        assert(va == 0);
817        tc->setMiscRegWithEffect(MISCREG_MMU_DTLB_CX_TSB_PS0, data);
818        break;
819      case ASI_DMMU_CTXT_NONZERO_TSB_BASE_PS1:
820        assert(va == 0);
821        tc->setMiscRegWithEffect(MISCREG_MMU_DTLB_CX_TSB_PS1, data);
822        break;
823      case ASI_DMMU_CTXT_NONZERO_CONFIG:
824        assert(va == 0);
825        tc->setMiscRegWithEffect(MISCREG_MMU_DTLB_CX_CONFIG, data);
826        break;
827      case ASI_IMMU_CTXT_NONZERO_TSB_BASE_PS0:
828        assert(va == 0);
829        tc->setMiscRegWithEffect(MISCREG_MMU_ITLB_CX_TSB_PS0, data);
830        break;
831      case ASI_IMMU_CTXT_NONZERO_TSB_BASE_PS1:
832        assert(va == 0);
833        tc->setMiscRegWithEffect(MISCREG_MMU_ITLB_CX_TSB_PS1, data);
834        break;
835      case ASI_IMMU_CTXT_NONZERO_CONFIG:
836        assert(va == 0);
837        tc->setMiscRegWithEffect(MISCREG_MMU_ITLB_CX_CONFIG, data);
838        break;
839      case ASI_SPARC_ERROR_EN_REG:
840      case ASI_SPARC_ERROR_STATUS_REG:
841        warn("Ignoring write to SPARC ERROR regsiter\n");
842        break;
843      case ASI_HYP_SCRATCHPAD:
844      case ASI_SCRATCHPAD:
845        tc->setMiscRegWithEffect(MISCREG_SCRATCHPAD_R0 + (va >> 3), data);
846        break;
847      case ASI_IMMU:
848        switch (va) {
849          case 0x30:
850            tc->setMiscRegWithEffect(MISCREG_MMU_ITLB_TAG_ACCESS, data);
851            break;
852          default:
853            goto doMmuWriteError;
854        }
855        break;
856      case ASI_ITLB_DATA_ACCESS_REG:
857        entry_insert = bits(va, 8,3);
858      case ASI_ITLB_DATA_IN_REG:
859        assert(entry_insert != -1 || mbits(va,10,9) == va);
860        ta_insert = tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_TAG_ACCESS);
861        va_insert = mbits(ta_insert, 63,13);
862        ct_insert = mbits(ta_insert, 12,0);
863        part_insert = tc->readMiscRegWithEffect(MISCREG_MMU_PART_ID);
864        real_insert = bits(va, 9,9);
865        pte.populate(data, bits(va,10,10) ? PageTableEntry::sun4v :
866                PageTableEntry::sun4u);
867        tc->getITBPtr()->insert(va_insert, part_insert, ct_insert, real_insert,
868                pte, entry_insert);
869        break;
870      case ASI_DTLB_DATA_ACCESS_REG:
871        entry_insert = bits(va, 8,3);
872      case ASI_DTLB_DATA_IN_REG:
873        assert(entry_insert != -1 || mbits(va,10,9) == va);
874        ta_insert = tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_TAG_ACCESS);
875        va_insert = mbits(ta_insert, 63,13);
876        ct_insert = mbits(ta_insert, 12,0);
877        part_insert = tc->readMiscRegWithEffect(MISCREG_MMU_PART_ID);
878        real_insert = bits(va, 9,9);
879        pte.populate(data, bits(va,10,10) ? PageTableEntry::sun4v :
880                PageTableEntry::sun4u);
881        insert(va_insert, part_insert, ct_insert, real_insert, pte, entry_insert);
882        break;
883      case ASI_DMMU:
884        switch (va) {
885          case 0x30:
886            tc->setMiscRegWithEffect(MISCREG_MMU_DTLB_TAG_ACCESS, data);
887            break;
888          case 0x80:
889            tc->setMiscRegWithEffect(MISCREG_MMU_PART_ID, data);
890            break;
891          default:
892            goto doMmuWriteError;
893        }
894        break;
895      default:
896doMmuWriteError:
897        panic("need to impl DTB::doMmuRegWrite() got asi=%#x, va=%#x d=%#x\n",
898            (uint32_t)pkt->req->getAsi(), pkt->getAddr(), data);
899    }
900    pkt->result = Packet::Success;
901    return tc->getCpuPtr()->cycles(1);
902}
903
904void
905TLB::serialize(std::ostream &os)
906{
907    panic("Need to implement serialize tlb for SPARC\n");
908}
909
910void
911TLB::unserialize(Checkpoint *cp, const std::string &section)
912{
913    panic("Need to implement unserialize tlb for SPARC\n");
914}
915
916
917DEFINE_SIM_OBJECT_CLASS_NAME("SparcTLB", TLB)
918
919BEGIN_DECLARE_SIM_OBJECT_PARAMS(ITB)
920
921    Param<int> size;
922
923END_DECLARE_SIM_OBJECT_PARAMS(ITB)
924
925BEGIN_INIT_SIM_OBJECT_PARAMS(ITB)
926
927    INIT_PARAM_DFLT(size, "TLB size", 48)
928
929END_INIT_SIM_OBJECT_PARAMS(ITB)
930
931
932CREATE_SIM_OBJECT(ITB)
933{
934    return new ITB(getInstanceName(), size);
935}
936
937REGISTER_SIM_OBJECT("SparcITB", ITB)
938
939BEGIN_DECLARE_SIM_OBJECT_PARAMS(DTB)
940
941    Param<int> size;
942
943END_DECLARE_SIM_OBJECT_PARAMS(DTB)
944
945BEGIN_INIT_SIM_OBJECT_PARAMS(DTB)
946
947    INIT_PARAM_DFLT(size, "TLB size", 64)
948
949END_INIT_SIM_OBJECT_PARAMS(DTB)
950
951
952CREATE_SIM_OBJECT(DTB)
953{
954    return new DTB(getInstanceName(), size);
955}
956
957REGISTER_SIM_OBJECT("SparcDTB", DTB)
958}
959