1/*
2 * Copyright N) 2007 MIPS Technologies, Inc. All Rights Reserved
3 *
4 * This software is part of the M5 simulator.
5 *
6 * THIS IS A LEGAL AGREEMENT. BY DOWNLOADING, USING, COPYING, CREATING
7 * DERIVATIVE WORKS, AND/OR DISTRIBUTING THIS SOFTWARE YOU ARE AGREEING
8 * TO THESE TERMS AND CONDITIONS.
9 *
10 * Permission is granted to use, copy, create derivative works and
11 * distribute this software and such derivative works for any purpose,
12 * so long as (1) the copyright notice above, this grant of permission,
13 * and the disclaimer below appear in all copies and derivative works
14 * made, (2) the copyright notice above is augmented as appropriate to
15 * reflect the addition of any new copyrightable work in a derivative
16 * work (e.g., Copyright N) <Publication Year> Copyright Owner), and (3)
17 * the name of MIPS Technologies, Inc. ($(B!H(BMIPS$(B!I(B) is not used in any
18 * advertising or publicity pertaining to the use or distribution of
19 * this software without specific, written prior authorization.
20 *
21 * THIS SOFTWARE IS PROVIDED $(B!H(BAS IS.$(B!I(B MIPS MAKES NO WARRANTIES AND
22 * DISCLAIMS ALL WARRANTIES, WHETHER EXPRESS, STATUTORY, IMPLIED OR
23 * OTHERWISE, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
25 * NON-INFRINGEMENT OF THIRD PARTY RIGHTS, REGARDING THIS SOFTWARE.
26 * IN NO EVENT SHALL MIPS BE LIABLE FOR ANY DAMAGES, INCLUDING DIRECT,
27 * INDIRECT, INCIDENTAL, CONSEQUENTIAL, SPECIAL, OR PUNITIVE DAMAGES OF
28 * ANY KIND OR NATURE, ARISING OUT OF OR IN CONNECTION WITH THIS AGREEMENT,
29 * THIS SOFTWARE AND/OR THE USE OF THIS SOFTWARE, WHETHER SUCH LIABILITY
30 * IS ASSERTED ON THE BASIS OF CONTRACT, TORT (INCLUDING NEGLIGENCE OR
31 * STRICT LIABILITY), OR OTHERWISE, EVEN IF MIPS HAS BEEN WARNED OF THE
32 * POSSIBILITY OF ANY SUCH LOSS OR DAMAGE IN ADVANCE.
33 *
34 * Authors: Gabe M. Black
35 * Korey L. Sewell
36 * Jaidev Patwardhan
37 */
38
39#include "arch/mips/faults.hh"
40#include "cpu/thread_context.hh"
41#include "cpu/base.hh"
42#include "base/trace.hh"
43#include "arch/mips/pra_constants.hh"
44#if !FULL_SYSTEM
45#include "sim/process.hh"
46#include "mem/page_table.hh"
47#endif
48
49namespace MipsISA
50{
51
52FaultName MachineCheckFault::_name = "Machine Check";
53FaultVect MachineCheckFault::_vect = 0x0401;
54FaultStat MachineCheckFault::_count;
55
56FaultName AlignmentFault::_name = "Alignment";
57FaultVect AlignmentFault::_vect = 0x0301;
58FaultStat AlignmentFault::_count;
59
60FaultName ResetFault::_name = "reset";
61#if FULL_SYSTEM
62FaultVect ResetFault::_vect = 0xBFC00000;
63#else
64FaultVect ResetFault::_vect = 0x001;
65#endif
66FaultStat ResetFault::_count;
67
68FaultName AddressErrorFault::_name = "Address Error";
69FaultVect AddressErrorFault::_vect = 0x0180;
70FaultStat AddressErrorFault::_count;
71
72FaultName StoreAddressErrorFault::_name = "Store Address Error";
73FaultVect StoreAddressErrorFault::_vect = 0x0180;
74FaultStat StoreAddressErrorFault::_count;
75
76
77FaultName SystemCallFault::_name = "Syscall";
78FaultVect SystemCallFault::_vect = 0x0180;
79FaultStat SystemCallFault::_count;
80
81FaultName CoprocessorUnusableFault::_name = "Coprocessor Unusable";
82FaultVect CoprocessorUnusableFault::_vect = 0x180;
83FaultStat CoprocessorUnusableFault::_count;
84
85FaultName ReservedInstructionFault::_name = "Reserved Instruction";
86FaultVect ReservedInstructionFault::_vect = 0x0180;
87FaultStat ReservedInstructionFault::_count;
88
89FaultName ThreadFault::_name = "thread";
90FaultVect ThreadFault::_vect = 0x00F1;
91FaultStat ThreadFault::_count;
92
93
94FaultName ArithmeticFault::_name = "Arithmetic Overflow Exception";
95FaultVect ArithmeticFault::_vect = 0x180;
96FaultStat ArithmeticFault::_count;
97
98FaultName UnimplementedOpcodeFault::_name = "opdec";
99FaultVect UnimplementedOpcodeFault::_vect = 0x0481;
100FaultStat UnimplementedOpcodeFault::_count;
101
102FaultName InterruptFault::_name = "interrupt";
103FaultVect InterruptFault::_vect = 0x0180;
104FaultStat InterruptFault::_count;
105
106FaultName TrapFault::_name = "Trap";
107FaultVect TrapFault::_vect = 0x0180;
108FaultStat TrapFault::_count;
109
110FaultName BreakpointFault::_name = "Breakpoint";
111FaultVect BreakpointFault::_vect = 0x0180;
112FaultStat BreakpointFault::_count;
113
114
115FaultName ItbInvalidFault::_name = "Invalid TLB Entry Exception (I-Fetch/LW)";
116FaultVect ItbInvalidFault::_vect = 0x0180;
117FaultStat ItbInvalidFault::_count;
118
119FaultName ItbPageFault::_name = "itbmiss";
120FaultVect ItbPageFault::_vect = 0x0181;
121FaultStat ItbPageFault::_count;
122
123FaultName ItbMissFault::_name = "itbmiss";
124FaultVect ItbMissFault::_vect = 0x0181;
125FaultStat ItbMissFault::_count;
126
127FaultName ItbAcvFault::_name = "iaccvio";
128FaultVect ItbAcvFault::_vect = 0x0081;
129FaultStat ItbAcvFault::_count;
130
131FaultName ItbRefillFault::_name = "TLB Refill Exception (I-Fetch/LW)";
132FaultVect ItbRefillFault::_vect = 0x0180;
133FaultStat ItbRefillFault::_count;
134
135FaultName NDtbMissFault::_name = "dtb_miss_single";
136FaultVect NDtbMissFault::_vect = 0x0201;
137FaultStat NDtbMissFault::_count;
138
139FaultName PDtbMissFault::_name = "dtb_miss_double";
140FaultVect PDtbMissFault::_vect = 0x0281;
141FaultStat PDtbMissFault::_count;
142
143FaultName DtbPageFault::_name = "dfault";
144FaultVect DtbPageFault::_vect = 0x0381;
145FaultStat DtbPageFault::_count;
146
147FaultName DtbAcvFault::_name = "dfault";
148FaultVect DtbAcvFault::_vect = 0x0381;
149FaultStat DtbAcvFault::_count;
150
151FaultName DtbInvalidFault::_name = "Invalid TLB Entry Exception (Store)";
152FaultVect DtbInvalidFault::_vect = 0x0180;
153FaultStat DtbInvalidFault::_count;
154
155FaultName DtbRefillFault::_name = "TLB Refill Exception (Store)";
156FaultVect DtbRefillFault::_vect = 0x0180;
157FaultStat DtbRefillFault::_count;
158
159FaultName TLBModifiedFault::_name = "TLB Modified Exception";
160FaultVect TLBModifiedFault::_vect = 0x0180;
161FaultStat TLBModifiedFault::_count;
162
163FaultName FloatEnableFault::_name = "float_enable_fault";
164FaultVect FloatEnableFault::_vect = 0x0581;
165FaultStat FloatEnableFault::_count;
166
167FaultName IntegerOverflowFault::_name = "Integer Overflow Fault";
168FaultVect IntegerOverflowFault::_vect = 0x0501;
169FaultStat IntegerOverflowFault::_count;
170
171FaultName DspStateDisabledFault::_name = "DSP Disabled Fault";
172FaultVect DspStateDisabledFault::_vect = 0x001a;
173FaultStat DspStateDisabledFault::_count;
174
175#if FULL_SYSTEM
176void MipsFault::setHandlerPC(Addr HandlerBase, ThreadContext *tc)
177{
178 tc->setPC(HandlerBase);
179 tc->setNextPC(HandlerBase+sizeof(MachInst));
180 tc->setNextNPC(HandlerBase+2*sizeof(MachInst));
181}
182
183void MipsFault::setExceptionState(ThreadContext *tc,uint8_t ExcCode)
184{
185 // modify SRS Ctl - Save CSS, put ESS into CSS
186 MiscReg stat = tc->readMiscReg(MipsISA::Status);
187 if(bits(stat,Status_EXL) != 1 && bits(stat,Status_BEV) != 1)
188 {
189 // SRS Ctl is modified only if Status_EXL and Status_BEV are not set
190 MiscReg srs = tc->readMiscReg(MipsISA::SRSCtl);
191 uint8_t CSS,ESS;
192 CSS = bits(srs,SRSCtl_CSS_HI,SRSCtl_CSS_LO);
193 ESS = bits(srs,SRSCtl_ESS_HI,SRSCtl_ESS_LO);
194 // Move CSS to PSS
195 replaceBits(srs,SRSCtl_PSS_HI,SRSCtl_PSS_LO,CSS);
196 // Move ESS to CSS
197 replaceBits(srs,SRSCtl_CSS_HI,SRSCtl_CSS_LO,ESS);
198 tc->setMiscRegNoEffect(MipsISA::SRSCtl,srs);
199 tc->setShadowSet(ESS);
200 }
201
202 // set EXL bit (don't care if it is already set!)
203 replaceBits(stat,Status_EXL_HI,Status_EXL_LO,1);
204 tc->setMiscRegNoEffect(MipsISA::Status,stat);
205
206 // write EPC
207 // warn("Set EPC to %x\n",tc->readPC());
208 // CHECK ME or FIXME or FIX ME or POSSIBLE HACK
209 // Check to see if the exception occurred in the branch delay slot
210 DPRINTF(MipsPRA,"PC: %x, NextPC: %x, NNPC: %x\n",tc->readPC(),tc->readNextPC(),tc->readNextNPC());
211 int C_BD=0;
212 if(tc->readPC() + sizeof(MachInst) != tc->readNextPC()){
213 tc->setMiscRegNoEffect(MipsISA::EPC,tc->readPC()-sizeof(MachInst));
214 // In the branch delay slot? set CAUSE_31
215 C_BD = 1;
216 } else {
217 tc->setMiscRegNoEffect(MipsISA::EPC,tc->readPC());
218 // In the branch delay slot? reset CAUSE_31
219 C_BD = 0;
220 }
221
222 // Set Cause_EXCCODE field
223 MiscReg cause = tc->readMiscReg(MipsISA::Cause);
224 replaceBits(cause,Cause_EXCCODE_HI,Cause_EXCCODE_LO,ExcCode);
225 replaceBits(cause,Cause_BD_HI,Cause_BD_LO,C_BD);
226 replaceBits(cause,Cause_CE_HI,Cause_CE_LO,0);
227 tc->setMiscRegNoEffect(MipsISA::Cause,cause);
228
229}
230
231void ArithmeticFault::invoke(ThreadContext *tc)
232{
233 DPRINTF(MipsPRA,"%s encountered.\n", name());
234 setExceptionState(tc,0xC);
235
236 // Set new PC
237 Addr HandlerBase;
238 MiscReg stat = tc->readMiscReg(MipsISA::Status);
239 // Here, the handler is dependent on BEV, which is not modified by setExceptionState()
240 if(bits(stat,Status_BEV)==0){ // See MIPS ARM Vol 3, Revision 2, Page 38
241 HandlerBase= vect() + tc->readMiscReg(MipsISA::EBase);
242 }else{
243 HandlerBase = 0xBFC00200;
244 }
245 setHandlerPC(HandlerBase,tc);
246 // warn("Exception Handler At: %x \n",HandlerBase);
247}
248
249void StoreAddressErrorFault::invoke(ThreadContext *tc)
250{
251 DPRINTF(MipsPRA,"%s encountered.\n", name());
252 setExceptionState(tc,0x5);
253 tc->setMiscRegNoEffect(MipsISA::BadVAddr,BadVAddr);
254
255 // Set new PC
256 Addr HandlerBase;
257 HandlerBase= vect() + tc->readMiscReg(MipsISA::EBase); // Offset 0x180 - General Exception Vector
258 setHandlerPC(HandlerBase,tc);
259 // warn("Exception Handler At: %x \n",HandlerBase);
260 // warn("Exception Handler At: %x , EPC set to %x\n",HandlerBase,tc->readMiscReg(MipsISA::EPC));
261
262}
263
264void TrapFault::invoke(ThreadContext *tc)
265{
266 DPRINTF(MipsPRA,"%s encountered.\n", name());
267 // warn("%s encountered.\n", name());
268 setExceptionState(tc,0xD);
269
270 // Set new PC
271 Addr HandlerBase;
272 HandlerBase= vect() + tc->readMiscReg(MipsISA::EBase); // Offset 0x180 - General Exception Vector
273 setHandlerPC(HandlerBase,tc);
274 // warn("Exception Handler At: %x \n",HandlerBase);
275 // warn("Exception Handler At: %x , EPC set to %x\n",HandlerBase,tc->readMiscReg(MipsISA::EPC));
276}
277
278void BreakpointFault::invoke(ThreadContext *tc)
279{
280 setExceptionState(tc,0x9);
281
282 // Set new PC
283 Addr HandlerBase;
284 HandlerBase= vect() + tc->readMiscReg(MipsISA::EBase); // Offset 0x180 - General Exception Vector
285 setHandlerPC(HandlerBase,tc);
286 // warn("Exception Handler At: %x \n",HandlerBase);
287 // warn("Exception Handler At: %x , EPC set to %x\n",HandlerBase,tc->readMiscReg(MipsISA::EPC));
288
289}
290
291void DtbInvalidFault::invoke(ThreadContext *tc)
292{
293 DPRINTF(MipsPRA,"%s encountered.\n", name());
294 // warn("%s encountered.\n", name());
295 tc->setMiscRegNoEffect(MipsISA::BadVAddr,BadVAddr);
296 MiscReg eh = tc->readMiscReg(MipsISA::EntryHi);
297 replaceBits(eh,EntryHi_ASID_HI,EntryHi_ASID_LO,EntryHi_Asid);
298 replaceBits(eh,EntryHi_VPN2_HI,EntryHi_VPN2_LO,EntryHi_VPN2);
299 replaceBits(eh,EntryHi_VPN2X_HI,EntryHi_VPN2X_LO,EntryHi_VPN2X);
300 tc->setMiscRegNoEffect(MipsISA::EntryHi,eh);
301 MiscReg ctxt = tc->readMiscReg(MipsISA::Context);
302 replaceBits(ctxt,Context_BadVPN2_HI,Context_BadVPN2_LO,Context_BadVPN2);
303 tc->setMiscRegNoEffect(MipsISA::Context,ctxt);
304 setExceptionState(tc,0x3);
305
306
307 // Set new PC
308 Addr HandlerBase;
309 HandlerBase= vect() + tc->readMiscReg(MipsISA::EBase); // Offset 0x180 - General Exception Vector
310 setHandlerPC(HandlerBase,tc);
311 // warn("Exception Handler At: %x , EPC set to %x\n",HandlerBase,tc->readMiscReg(MipsISA::EPC));
312}
313
314void AddressErrorFault::invoke(ThreadContext *tc)
315{
316 DPRINTF(MipsPRA,"%s encountered.\n", name());
317 setExceptionState(tc,0x4);
318 tc->setMiscRegNoEffect(MipsISA::BadVAddr,BadVAddr);
319
320 // Set new PC
321 Addr HandlerBase;
322 HandlerBase= vect() + tc->readMiscReg(MipsISA::EBase); // Offset 0x180 - General Exception Vector
323 setHandlerPC(HandlerBase,tc);
324}
325
326void ItbInvalidFault::invoke(ThreadContext *tc)
327{
328 DPRINTF(MipsPRA,"%s encountered.\n", name());
329 setExceptionState(tc,0x2);
330 tc->setMiscRegNoEffect(MipsISA::BadVAddr,BadVAddr);
331 MiscReg eh = tc->readMiscReg(MipsISA::EntryHi);
332 replaceBits(eh,EntryHi_ASID_HI,EntryHi_ASID_LO,EntryHi_Asid);
333 replaceBits(eh,EntryHi_VPN2_HI,EntryHi_VPN2_LO,EntryHi_VPN2);
334 replaceBits(eh,EntryHi_VPN2X_HI,EntryHi_VPN2X_LO,EntryHi_VPN2X);
335 tc->setMiscRegNoEffect(MipsISA::EntryHi,eh);
336 MiscReg ctxt = tc->readMiscReg(MipsISA::Context);
337 replaceBits(ctxt,Context_BadVPN2_HI,Context_BadVPN2_LO,Context_BadVPN2);
338 tc->setMiscRegNoEffect(MipsISA::Context,ctxt);
339
340
341 // Set new PC
342 Addr HandlerBase;
343 HandlerBase= vect() + tc->readMiscReg(MipsISA::EBase); // Offset 0x180 - General Exception Vector
344 setHandlerPC(HandlerBase,tc);
345 DPRINTF(MipsPRA,"Exception Handler At: %x , EPC set to %x\n",HandlerBase,tc->readMiscReg(MipsISA::EPC));
346}
347
348void ItbRefillFault::invoke(ThreadContext *tc)
349{
350 DPRINTF(MipsPRA,"%s encountered (%x).\n", name(),BadVAddr);
351 Addr HandlerBase;
352 tc->setMiscRegNoEffect(MipsISA::BadVAddr,BadVAddr);
353 MiscReg eh = tc->readMiscReg(MipsISA::EntryHi);
354 replaceBits(eh,EntryHi_ASID_HI,EntryHi_ASID_LO,EntryHi_Asid);
355 replaceBits(eh,EntryHi_VPN2_HI,EntryHi_VPN2_LO,EntryHi_VPN2);
356 replaceBits(eh,EntryHi_VPN2X_HI,EntryHi_VPN2X_LO,EntryHi_VPN2X);
357 tc->setMiscRegNoEffect(MipsISA::EntryHi,eh);
358 MiscReg ctxt = tc->readMiscReg(MipsISA::Context);
359 replaceBits(ctxt,Context_BadVPN2_HI,Context_BadVPN2_LO,Context_BadVPN2);
360 tc->setMiscRegNoEffect(MipsISA::Context,ctxt);
361
362 MiscReg stat = tc->readMiscReg(MipsISA::Status);
363 // Since handler depends on EXL bit, must check EXL bit before setting it!!
364 if(bits(stat,Status_EXL)==1){ // See MIPS ARM Vol 3, Revision 2, Page 38
365 HandlerBase= vect() + tc->readMiscReg(MipsISA::EBase); // Offset 0x180 - General Exception Vector
366 }else{
367 HandlerBase = tc->readMiscReg(MipsISA::EBase); // Offset 0x000
368 }
369
370 setExceptionState(tc,0x2);
371 setHandlerPC(HandlerBase,tc);
372}
373
374void DtbRefillFault::invoke(ThreadContext *tc)
375{
376 // Set new PC
377 DPRINTF(MipsPRA,"%s encountered.\n", name());
378 Addr HandlerBase;
379 tc->setMiscRegNoEffect(MipsISA::BadVAddr,BadVAddr);
380 MiscReg eh = tc->readMiscReg(MipsISA::EntryHi);
381 replaceBits(eh,EntryHi_ASID_HI,EntryHi_ASID_LO,EntryHi_Asid);
382 replaceBits(eh,EntryHi_VPN2_HI,EntryHi_VPN2_LO,EntryHi_VPN2);
383 replaceBits(eh,EntryHi_VPN2X_HI,EntryHi_VPN2X_LO,EntryHi_VPN2X);
384 tc->setMiscRegNoEffect(MipsISA::EntryHi,eh);
385 MiscReg ctxt = tc->readMiscReg(MipsISA::Context);
386 replaceBits(ctxt,Context_BadVPN2_HI,Context_BadVPN2_LO,Context_BadVPN2);
387 tc->setMiscRegNoEffect(MipsISA::Context,ctxt);
388
389 MiscReg stat = tc->readMiscReg(MipsISA::Status);
390 // Since handler depends on EXL bit, must check EXL bit before setting it!!
391 if(bits(stat,Status_EXL)==1){ // See MIPS ARM Vol 3, Revision 2, Page 38
392 HandlerBase= vect() + tc->readMiscReg(MipsISA::EBase); // Offset 0x180 - General Exception Vector
393 }else{
394 HandlerBase = tc->readMiscReg(MipsISA::EBase); // Offset 0x000
395 }
396
397
398 setExceptionState(tc,0x3);
399
400 setHandlerPC(HandlerBase,tc);
401}
402
403void TLBModifiedFault::invoke(ThreadContext *tc)
404{
405 DPRINTF(MipsPRA,"%s encountered.\n", name());
406 tc->setMiscRegNoEffect(MipsISA::BadVAddr,BadVAddr);
407 MiscReg eh = tc->readMiscReg(MipsISA::EntryHi);
408 replaceBits(eh,EntryHi_ASID_HI,EntryHi_ASID_LO,EntryHi_Asid);
409 replaceBits(eh,EntryHi_VPN2_HI,EntryHi_VPN2_LO,EntryHi_VPN2);
410 replaceBits(eh,EntryHi_VPN2X_HI,EntryHi_VPN2X_LO,EntryHi_VPN2X);
411 tc->setMiscRegNoEffect(MipsISA::EntryHi,eh);
412 MiscReg ctxt = tc->readMiscReg(MipsISA::Context);
413 replaceBits(ctxt,Context_BadVPN2_HI,Context_BadVPN2_LO,Context_BadVPN2);
414 tc->setMiscRegNoEffect(MipsISA::Context,ctxt);
415
416 // Set new PC
417 Addr HandlerBase;
418 HandlerBase= vect() + tc->readMiscReg(MipsISA::EBase); // Offset 0x180 - General Exception Vector
419 setExceptionState(tc,0x1);
420 setHandlerPC(HandlerBase,tc);
421 // warn("Exception Handler At: %x , EPC set to %x\n",HandlerBase,tc->readMiscReg(MipsISA::EPC));
422
423}
424
425void SystemCallFault::invoke(ThreadContext *tc)
426{
427 DPRINTF(MipsPRA,"%s encountered.\n", name());
428 setExceptionState(tc,0x8);
429
430 // Set new PC
431 Addr HandlerBase;
432 HandlerBase= vect() + tc->readMiscReg(MipsISA::EBase); // Offset 0x180 - General Exception Vector
433 setHandlerPC(HandlerBase,tc);
434 // warn("Exception Handler At: %x \n",HandlerBase);
435 // warn("Exception Handler At: %x , EPC set to %x\n",HandlerBase,tc->readMiscReg(MipsISA::EPC));
436
437}
438
439void InterruptFault::invoke(ThreadContext *tc)
440{
441#if FULL_SYSTEM
442 DPRINTF(MipsPRA,"%s encountered.\n", name());
443 //RegFile *Reg = tc->getRegFilePtr(); // Get pointer to the register fil
444 setExceptionState(tc,0x0A);
445 Addr HandlerBase;
446
447
448 uint8_t IV = bits(tc->readMiscRegNoEffect(MipsISA::Cause),Cause_IV);
449 if (IV)// Offset 200 for release 2
450 HandlerBase= 0x20 + vect() + tc->readMiscRegNoEffect(MipsISA::EBase);
451 else//Ofset at 180 for release 1
452 HandlerBase= vect() + tc->readMiscRegNoEffect(MipsISA::EBase);
453
454 setHandlerPC(HandlerBase,tc);
455#endif
456}
457
458#endif // FULL_SYSTEM
459
460void ResetFault::invoke(ThreadContext *tc)
461{
462 DPRINTF(MipsPRA,"%s encountered.\n", name());
463 /* All reset activity must be invoked from here */
464 tc->setPC(vect());
465 tc->setNextPC(vect()+sizeof(MachInst));
466 tc->setNextNPC(vect()+sizeof(MachInst)+sizeof(MachInst));
467 DPRINTF(MipsPRA,"(%x) - ResetFault::invoke : PC set to %x",(unsigned)tc,(unsigned)tc->readPC());
468}
469
470void ReservedInstructionFault::invoke(ThreadContext *tc)
471{
472#if FULL_SYSTEM
473 DPRINTF(MipsPRA,"%s encountered.\n", name());
474 //RegFile *Reg = tc->getRegFilePtr(); // Get pointer to the register fil
475 setExceptionState(tc,0x0A);
476 Addr HandlerBase;
477 HandlerBase= vect() + tc->readMiscRegNoEffect(MipsISA::EBase); // Offset 0x180 - General Exception Vector
478 setHandlerPC(HandlerBase,tc);
479#else
480 panic("%s encountered.\n", name());
481#endif
482}
483
484void ThreadFault::invoke(ThreadContext *tc)
485{
486 DPRINTF(MipsPRA,"%s encountered.\n", name());
487 panic("%s encountered.\n", name());
488}
489
490void DspStateDisabledFault::invoke(ThreadContext *tc)
491{
492 DPRINTF(MipsPRA,"%s encountered.\n", name());
493 panic("%s encountered.\n", name());
494}
495
496void CoprocessorUnusableFault::invoke(ThreadContext *tc)
497{
498#if FULL_SYSTEM
499 DPRINTF(MipsPRA,"%s encountered.\n", name());
500 setExceptionState(tc,0xb);
501 /* The ID of the coprocessor causing the exception is stored in CoprocessorUnusableFault::coProcID */
502 MiscReg cause = tc->readMiscReg(MipsISA::Cause);
503 replaceBits(cause,Cause_CE_HI,Cause_CE_LO,coProcID);
504 tc->setMiscRegNoEffect(MipsISA::Cause,cause);
505
506 Addr HandlerBase;
507 HandlerBase= vect() + tc->readMiscReg(MipsISA::EBase); // Offset 0x180 - General Exception Vector
508 setHandlerPC(HandlerBase,tc);
509
510 // warn("Status: %x, Cause: %x\n",tc->readMiscReg(MipsISA::Status),tc->readMiscReg(MipsISA::Cause));
511#else
512 panic("%s encountered.\n", name());
513#endif
514}
515
516} // namespace MipsISA
517