1/* 2 * This file contains the 64-bit "server" PowerPC variant 3 * of the low level exception handling including exception 4 * vectors, exception return, part of the slb and stab 5 * handling and other fixed offset specific things. 6 * 7 * This file is meant to be #included from head_64.S due to 8 * position dependent assembly. 9 * 10 * Most of this originates from head_64.S and thus has the same 11 * copyright history. 12 * 13 */ 14 15#include <asm/hw_irq.h> 16#include <asm/exception-64s.h> 17#include <asm/ptrace.h> 18 19/* 20 * We layout physical memory as follows: 21 * 0x0000 - 0x00ff : Secondary processor spin code 22 * 0x0100 - 0x17ff : pSeries Interrupt prologs 23 * 0x1800 - 0x4000 : interrupt support common interrupt prologs 24 * 0x4000 - 0x5fff : pSeries interrupts with IR=1,DR=1 25 * 0x6000 - 0x6fff : more interrupt support including for IR=1,DR=1 26 * 0x7000 - 0x7fff : FWNMI data area 27 * 0x8000 - 0x8fff : Initial (CPU0) segment table 28 * 0x9000 - : Early init and support code 29 */ 30 /* Syscall routine is used twice, in reloc-off and reloc-on paths */ 31#define SYSCALL_PSERIES_1 \ 32BEGIN_FTR_SECTION \ 33 cmpdi r0,0x1ebe ; \ 34 beq- 1f ; \ 35END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE) \ 36 mr r9,r13 ; \ 37 GET_PACA(r13) ; \ 38 mfspr r11,SPRN_SRR0 ; \ 390: 40 41#define SYSCALL_PSERIES_2_RFID \ 42 mfspr r12,SPRN_SRR1 ; \ 43 ld r10,PACAKBASE(r13) ; \ 44 LOAD_HANDLER(r10, system_call_entry) ; \ 45 mtspr SPRN_SRR0,r10 ; \ 46 ld r10,PACAKMSR(r13) ; \ 47 mtspr SPRN_SRR1,r10 ; \ 48 rfid ; \ 49 b . ; /* prevent speculative execution */ 50 51#define SYSCALL_PSERIES_3 \ 52 /* Fast LE/BE switch system call */ \ 531: mfspr r12,SPRN_SRR1 ; \ 54 xori r12,r12,MSR_LE ; \ 55 mtspr SPRN_SRR1,r12 ; \ 56 rfid ; /* return to userspace */ \ 57 b . ; /* prevent speculative execution */ 58 59#if defined(CONFIG_RELOCATABLE) 60 /* 61 * We can't branch directly; in the direct case we use LR 62 * and system_call_entry restores LR. (We thus need to move 63 * LR to r10 in the RFID case too.) 64 */ 65#define SYSCALL_PSERIES_2_DIRECT \ 66 mflr r10 ; \ 67 ld r12,PACAKBASE(r13) ; \ 68 LOAD_HANDLER(r12, system_call_entry_direct) ; \ 69 mtctr r12 ; \ 70 mfspr r12,SPRN_SRR1 ; \ 71 /* Re-use of r13... No spare regs to do this */ \ 72 li r13,MSR_RI ; \ 73 mtmsrd r13,1 ; \ 74 GET_PACA(r13) ; /* get r13 back */ \ 75 bctr ; 76#else 77 /* We can branch directly */ 78#define SYSCALL_PSERIES_2_DIRECT \ 79 mfspr r12,SPRN_SRR1 ; \ 80 li r10,MSR_RI ; \ 81 mtmsrd r10,1 ; /* Set RI (EE=0) */ \ 82 b system_call_entry_direct ; 83#endif 84 85/* 86 * This is the start of the interrupt handlers for pSeries 87 * This code runs with relocation off. 88 * Code from here to __end_interrupts gets copied down to real 89 * address 0x100 when we are running a relocatable kernel. 90 * Therefore any relative branches in this section must only 91 * branch to labels in this section. 92 */ 93 . = 0x100 94 .globl __start_interrupts 95__start_interrupts: 96 97 .globl system_reset_pSeries; 98system_reset_pSeries: 99 HMT_MEDIUM_PPR_DISCARD 100 SET_SCRATCH0(r13) 101#ifdef CONFIG_PPC_P7_NAP 102BEGIN_FTR_SECTION 103 /* Running native on arch 2.06 or later, check if we are 104 * waking up from nap. We only handle no state loss and 105 * supervisor state loss. We do -not- handle hypervisor 106 * state loss at this time. 107 */ 108 mfspr r13,SPRN_SRR1 109 rlwinm. r13,r13,47-31,30,31 110 beq 9f 111 112 /* waking up from powersave (nap) state */ 113 cmpwi cr1,r13,2 114 /* Total loss of HV state is fatal, we could try to use the 115 * PIR to locate a PACA, then use an emergency stack etc... 116 * OPAL v3 based powernv platforms have new idle states 117 * which fall in this catagory. 118 */ 119 bgt cr1,8f 120 GET_PACA(r13) 121 122#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 123 li r0,KVM_HWTHREAD_IN_KERNEL 124 stb r0,HSTATE_HWTHREAD_STATE(r13) 125 /* Order setting hwthread_state vs. testing hwthread_req */ 126 sync 127 lbz r0,HSTATE_HWTHREAD_REQ(r13) 128 cmpwi r0,0 129 beq 1f 130 b kvm_start_guest 1311: 132#endif 133 134 /* Return SRR1 from power7_nap() */ 135 mfspr r3,SPRN_SRR1 136 beq cr1,2f 137 b power7_wakeup_noloss 1382: b power7_wakeup_loss 139 140 /* Fast Sleep wakeup on PowerNV */ 1418: GET_PACA(r13) 142 b power7_wakeup_tb_loss 143 1449: 145END_FTR_SECTION_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_206) 146#endif /* CONFIG_PPC_P7_NAP */ 147 EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common, EXC_STD, 148 NOTEST, 0x100) 149 150 . = 0x200 151machine_check_pSeries_1: 152 /* This is moved out of line as it can be patched by FW, but 153 * some code path might still want to branch into the original 154 * vector 155 */ 156 HMT_MEDIUM_PPR_DISCARD 157 SET_SCRATCH0(r13) /* save r13 */ 158#ifdef CONFIG_PPC_P7_NAP 159BEGIN_FTR_SECTION 160 /* Running native on arch 2.06 or later, check if we are 161 * waking up from nap. We only handle no state loss and 162 * supervisor state loss. We do -not- handle hypervisor 163 * state loss at this time. 164 */ 165 mfspr r13,SPRN_SRR1 166 rlwinm. r13,r13,47-31,30,31 167 OPT_GET_SPR(r13, SPRN_CFAR, CPU_FTR_CFAR) 168 beq 9f 169 170 mfspr r13,SPRN_SRR1 171 rlwinm. r13,r13,47-31,30,31 172 /* waking up from powersave (nap) state */ 173 cmpwi cr1,r13,2 174 /* Total loss of HV state is fatal. let's just stay stuck here */ 175 OPT_GET_SPR(r13, SPRN_CFAR, CPU_FTR_CFAR) 176 bgt cr1,. 1779: 178 OPT_SET_SPR(r13, SPRN_CFAR, CPU_FTR_CFAR) 179END_FTR_SECTION_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_206) 180#endif /* CONFIG_PPC_P7_NAP */ 181 EXCEPTION_PROLOG_0(PACA_EXMC) 182BEGIN_FTR_SECTION 183 b machine_check_pSeries_early 184FTR_SECTION_ELSE 185 b machine_check_pSeries_0 186ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE) 187 188 . = 0x300 189 .globl data_access_pSeries 190data_access_pSeries: 191 HMT_MEDIUM_PPR_DISCARD 192 SET_SCRATCH0(r13) 193 EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, data_access_common, EXC_STD, 194 KVMTEST, 0x300) 195 196 . = 0x380 197 .globl data_access_slb_pSeries 198data_access_slb_pSeries: 199 HMT_MEDIUM_PPR_DISCARD 200 SET_SCRATCH0(r13) 201 EXCEPTION_PROLOG_0(PACA_EXSLB) 202 EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST, 0x380) 203 std r3,PACA_EXSLB+EX_R3(r13) 204 mfspr r3,SPRN_DAR 205#ifdef __DISABLED__ 206 /* Keep that around for when we re-implement dynamic VSIDs */ 207 cmpdi r3,0 208 bge slb_miss_user_pseries 209#endif /* __DISABLED__ */ 210 mfspr r12,SPRN_SRR1 211#ifndef CONFIG_RELOCATABLE 212 b slb_miss_realmode 213#else 214 /* 215 * We can't just use a direct branch to slb_miss_realmode 216 * because the distance from here to there depends on where 217 * the kernel ends up being put. 218 */ 219 mfctr r11 220 ld r10,PACAKBASE(r13) 221 LOAD_HANDLER(r10, slb_miss_realmode) 222 mtctr r10 223 bctr 224#endif 225 226 STD_EXCEPTION_PSERIES(0x400, 0x400, instruction_access) 227 228 . = 0x480 229 .globl instruction_access_slb_pSeries 230instruction_access_slb_pSeries: 231 HMT_MEDIUM_PPR_DISCARD 232 SET_SCRATCH0(r13) 233 EXCEPTION_PROLOG_0(PACA_EXSLB) 234 EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST_PR, 0x480) 235 std r3,PACA_EXSLB+EX_R3(r13) 236 mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */ 237#ifdef __DISABLED__ 238 /* Keep that around for when we re-implement dynamic VSIDs */ 239 cmpdi r3,0 240 bge slb_miss_user_pseries 241#endif /* __DISABLED__ */ 242 mfspr r12,SPRN_SRR1 243#ifndef CONFIG_RELOCATABLE 244 b slb_miss_realmode 245#else 246 mfctr r11 247 ld r10,PACAKBASE(r13) 248 LOAD_HANDLER(r10, slb_miss_realmode) 249 mtctr r10 250 bctr 251#endif 252 253 /* We open code these as we can't have a ". = x" (even with 254 * x = "." within a feature section 255 */ 256 . = 0x500; 257 .globl hardware_interrupt_pSeries; 258 .globl hardware_interrupt_hv; 259hardware_interrupt_pSeries: 260hardware_interrupt_hv: 261 HMT_MEDIUM_PPR_DISCARD 262 BEGIN_FTR_SECTION 263 _MASKABLE_EXCEPTION_PSERIES(0x502, hardware_interrupt, 264 EXC_HV, SOFTEN_TEST_HV) 265 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0x502) 266 FTR_SECTION_ELSE 267 _MASKABLE_EXCEPTION_PSERIES(0x500, hardware_interrupt, 268 EXC_STD, SOFTEN_TEST_HV_201) 269 KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x500) 270 ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_206) 271 272 STD_EXCEPTION_PSERIES(0x600, 0x600, alignment) 273 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x600) 274 275 STD_EXCEPTION_PSERIES(0x700, 0x700, program_check) 276 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x700) 277 278 STD_EXCEPTION_PSERIES(0x800, 0x800, fp_unavailable) 279 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x800) 280 281 . = 0x900 282 .globl decrementer_pSeries 283decrementer_pSeries: 284 _MASKABLE_EXCEPTION_PSERIES(0x900, decrementer, EXC_STD, SOFTEN_TEST_PR) 285 286 STD_EXCEPTION_HV(0x980, 0x982, hdecrementer) 287 288 MASKABLE_EXCEPTION_PSERIES(0xa00, 0xa00, doorbell_super) 289 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xa00) 290 291 STD_EXCEPTION_PSERIES(0xb00, 0xb00, trap_0b) 292 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xb00) 293 294 . = 0xc00 295 .globl system_call_pSeries 296system_call_pSeries: 297 /* 298 * If CONFIG_KVM_BOOK3S_64_HANDLER is set, save the PPR (on systems 299 * that support it) before changing to HMT_MEDIUM. That allows the KVM 300 * code to save that value into the guest state (it is the guest's PPR 301 * value). Otherwise just change to HMT_MEDIUM as userspace has 302 * already saved the PPR. 303 */ 304#ifdef CONFIG_KVM_BOOK3S_64_HANDLER 305 SET_SCRATCH0(r13) 306 GET_PACA(r13) 307 std r9,PACA_EXGEN+EX_R9(r13) 308 OPT_GET_SPR(r9, SPRN_PPR, CPU_FTR_HAS_PPR); 309 HMT_MEDIUM; 310 std r10,PACA_EXGEN+EX_R10(r13) 311 OPT_SAVE_REG_TO_PACA(PACA_EXGEN+EX_PPR, r9, CPU_FTR_HAS_PPR); 312 mfcr r9 313 KVMTEST(0xc00) 314 GET_SCRATCH0(r13) 315#else 316 HMT_MEDIUM; 317#endif 318 SYSCALL_PSERIES_1 319 SYSCALL_PSERIES_2_RFID 320 SYSCALL_PSERIES_3 321 KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xc00) 322 323 STD_EXCEPTION_PSERIES(0xd00, 0xd00, single_step) 324 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xd00) 325 326 /* At 0xe??? we have a bunch of hypervisor exceptions, we branch 327 * out of line to handle them 328 */ 329 . = 0xe00 330hv_data_storage_trampoline: 331 SET_SCRATCH0(r13) 332 EXCEPTION_PROLOG_0(PACA_EXGEN) 333 b h_data_storage_hv 334 335 . = 0xe20 336hv_instr_storage_trampoline: 337 SET_SCRATCH0(r13) 338 EXCEPTION_PROLOG_0(PACA_EXGEN) 339 b h_instr_storage_hv 340 341 . = 0xe40 342emulation_assist_trampoline: 343 SET_SCRATCH0(r13) 344 EXCEPTION_PROLOG_0(PACA_EXGEN) 345 b emulation_assist_hv 346 347 . = 0xe60 348hv_exception_trampoline: 349 SET_SCRATCH0(r13) 350 EXCEPTION_PROLOG_0(PACA_EXGEN) 351 b hmi_exception_early 352 353 . = 0xe80 354hv_doorbell_trampoline: 355 SET_SCRATCH0(r13) 356 EXCEPTION_PROLOG_0(PACA_EXGEN) 357 b h_doorbell_hv 358 359 /* We need to deal with the Altivec unavailable exception 360 * here which is at 0xf20, thus in the middle of the 361 * prolog code of the PerformanceMonitor one. A little 362 * trickery is thus necessary 363 */ 364 . = 0xf00 365performance_monitor_pseries_trampoline: 366 SET_SCRATCH0(r13) 367 EXCEPTION_PROLOG_0(PACA_EXGEN) 368 b performance_monitor_pSeries 369 370 . = 0xf20 371altivec_unavailable_pseries_trampoline: 372 SET_SCRATCH0(r13) 373 EXCEPTION_PROLOG_0(PACA_EXGEN) 374 b altivec_unavailable_pSeries 375 376 . = 0xf40 377vsx_unavailable_pseries_trampoline: 378 SET_SCRATCH0(r13) 379 EXCEPTION_PROLOG_0(PACA_EXGEN) 380 b vsx_unavailable_pSeries 381 382 . = 0xf60 383facility_unavailable_trampoline: 384 SET_SCRATCH0(r13) 385 EXCEPTION_PROLOG_0(PACA_EXGEN) 386 b facility_unavailable_pSeries 387 388 . = 0xf80 389hv_facility_unavailable_trampoline: 390 SET_SCRATCH0(r13) 391 EXCEPTION_PROLOG_0(PACA_EXGEN) 392 b facility_unavailable_hv 393 394#ifdef CONFIG_CBE_RAS 395 STD_EXCEPTION_HV(0x1200, 0x1202, cbe_system_error) 396 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1202) 397#endif /* CONFIG_CBE_RAS */ 398 399 STD_EXCEPTION_PSERIES(0x1300, 0x1300, instruction_breakpoint) 400 KVM_HANDLER_PR_SKIP(PACA_EXGEN, EXC_STD, 0x1300) 401 402 . = 0x1500 403 .global denorm_exception_hv 404denorm_exception_hv: 405 HMT_MEDIUM_PPR_DISCARD 406 mtspr SPRN_SPRG_HSCRATCH0,r13 407 EXCEPTION_PROLOG_0(PACA_EXGEN) 408 EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, 0x1500) 409 410#ifdef CONFIG_PPC_DENORMALISATION 411 mfspr r10,SPRN_HSRR1 412 mfspr r11,SPRN_HSRR0 /* save HSRR0 */ 413 andis. r10,r10,(HSRR1_DENORM)@h /* denorm? */ 414 addi r11,r11,-4 /* HSRR0 is next instruction */ 415 bne+ denorm_assist 416#endif 417 418 KVMTEST(0x1500) 419 EXCEPTION_PROLOG_PSERIES_1(denorm_common, EXC_HV) 420 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x1500) 421 422#ifdef CONFIG_CBE_RAS 423 STD_EXCEPTION_HV(0x1600, 0x1602, cbe_maintenance) 424 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1602) 425#endif /* CONFIG_CBE_RAS */ 426 427 STD_EXCEPTION_PSERIES(0x1700, 0x1700, altivec_assist) 428 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x1700) 429 430#ifdef CONFIG_CBE_RAS 431 STD_EXCEPTION_HV(0x1800, 0x1802, cbe_thermal) 432 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1802) 433#else 434 . = 0x1800 435#endif /* CONFIG_CBE_RAS */ 436 437 438/*** Out of line interrupts support ***/ 439 440 .align 7 441 /* moved from 0x200 */ 442machine_check_pSeries_early: 443BEGIN_FTR_SECTION 444 EXCEPTION_PROLOG_1(PACA_EXMC, NOTEST, 0x200) 445 /* 446 * Register contents: 447 * R13 = PACA 448 * R9 = CR 449 * Original R9 to R13 is saved on PACA_EXMC 450 * 451 * Switch to mc_emergency stack and handle re-entrancy (we limit 452 * the nested MCE upto level 4 to avoid stack overflow). 453 * Save MCE registers srr1, srr0, dar and dsisr and then set ME=1 454 * 455 * We use paca->in_mce to check whether this is the first entry or 456 * nested machine check. We increment paca->in_mce to track nested 457 * machine checks. 458 * 459 * If this is the first entry then set stack pointer to 460 * paca->mc_emergency_sp, otherwise r1 is already pointing to 461 * stack frame on mc_emergency stack. 462 * 463 * NOTE: We are here with MSR_ME=0 (off), which means we risk a 464 * checkstop if we get another machine check exception before we do 465 * rfid with MSR_ME=1. 466 */ 467 mr r11,r1 /* Save r1 */ 468 lhz r10,PACA_IN_MCE(r13) 469 cmpwi r10,0 /* Are we in nested machine check */ 470 bne 0f /* Yes, we are. */ 471 /* First machine check entry */ 472 ld r1,PACAMCEMERGSP(r13) /* Use MC emergency stack */ 4730: subi r1,r1,INT_FRAME_SIZE /* alloc stack frame */ 474 addi r10,r10,1 /* increment paca->in_mce */ 475 sth r10,PACA_IN_MCE(r13) 476 /* Limit nested MCE to level 4 to avoid stack overflow */ 477 cmpwi r10,4 478 bgt 2f /* Check if we hit limit of 4 */ 479 std r11,GPR1(r1) /* Save r1 on the stack. */ 480 std r11,0(r1) /* make stack chain pointer */ 481 mfspr r11,SPRN_SRR0 /* Save SRR0 */ 482 std r11,_NIP(r1) 483 mfspr r11,SPRN_SRR1 /* Save SRR1 */ 484 std r11,_MSR(r1) 485 mfspr r11,SPRN_DAR /* Save DAR */ 486 std r11,_DAR(r1) 487 mfspr r11,SPRN_DSISR /* Save DSISR */ 488 std r11,_DSISR(r1) 489 std r9,_CCR(r1) /* Save CR in stackframe */ 490 /* Save r9 through r13 from EXMC save area to stack frame. */ 491 EXCEPTION_PROLOG_COMMON_2(PACA_EXMC) 492 mfmsr r11 /* get MSR value */ 493 ori r11,r11,MSR_ME /* turn on ME bit */ 494 ori r11,r11,MSR_RI /* turn on RI bit */ 495 ld r12,PACAKBASE(r13) /* get high part of &label */ 496 LOAD_HANDLER(r12, machine_check_handle_early) 4971: mtspr SPRN_SRR0,r12 498 mtspr SPRN_SRR1,r11 499 rfid 500 b . /* prevent speculative execution */ 5012: 502 /* Stack overflow. Stay on emergency stack and panic. 503 * Keep the ME bit off while panic-ing, so that if we hit 504 * another machine check we checkstop. 505 */ 506 addi r1,r1,INT_FRAME_SIZE /* go back to previous stack frame */ 507 ld r11,PACAKMSR(r13) 508 ld r12,PACAKBASE(r13) 509 LOAD_HANDLER(r12, unrecover_mce) 510 li r10,MSR_ME 511 andc r11,r11,r10 /* Turn off MSR_ME */ 512 b 1b 513 b . /* prevent speculative execution */ 514END_FTR_SECTION_IFSET(CPU_FTR_HVMODE) 515 516machine_check_pSeries: 517 .globl machine_check_fwnmi 518machine_check_fwnmi: 519 HMT_MEDIUM_PPR_DISCARD 520 SET_SCRATCH0(r13) /* save r13 */ 521 EXCEPTION_PROLOG_0(PACA_EXMC) 522machine_check_pSeries_0: 523 EXCEPTION_PROLOG_1(PACA_EXMC, KVMTEST, 0x200) 524 EXCEPTION_PROLOG_PSERIES_1(machine_check_common, EXC_STD) 525 KVM_HANDLER_SKIP(PACA_EXMC, EXC_STD, 0x200) 526 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x300) 527 KVM_HANDLER_SKIP(PACA_EXSLB, EXC_STD, 0x380) 528 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x400) 529 KVM_HANDLER_PR(PACA_EXSLB, EXC_STD, 0x480) 530 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x900) 531 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0x982) 532 533#ifdef CONFIG_PPC_DENORMALISATION 534denorm_assist: 535BEGIN_FTR_SECTION 536/* 537 * To denormalise we need to move a copy of the register to itself. 538 * For POWER6 do that here for all FP regs. 539 */ 540 mfmsr r10 541 ori r10,r10,(MSR_FP|MSR_FE0|MSR_FE1) 542 xori r10,r10,(MSR_FE0|MSR_FE1) 543 mtmsrd r10 544 sync 545 546#define FMR2(n) fmr (n), (n) ; fmr n+1, n+1 547#define FMR4(n) FMR2(n) ; FMR2(n+2) 548#define FMR8(n) FMR4(n) ; FMR4(n+4) 549#define FMR16(n) FMR8(n) ; FMR8(n+8) 550#define FMR32(n) FMR16(n) ; FMR16(n+16) 551 FMR32(0) 552 553FTR_SECTION_ELSE 554/* 555 * To denormalise we need to move a copy of the register to itself. 556 * For POWER7 do that here for the first 32 VSX registers only. 557 */ 558 mfmsr r10 559 oris r10,r10,MSR_VSX@h 560 mtmsrd r10 561 sync 562 563#define XVCPSGNDP2(n) XVCPSGNDP(n,n,n) ; XVCPSGNDP(n+1,n+1,n+1) 564#define XVCPSGNDP4(n) XVCPSGNDP2(n) ; XVCPSGNDP2(n+2) 565#define XVCPSGNDP8(n) XVCPSGNDP4(n) ; XVCPSGNDP4(n+4) 566#define XVCPSGNDP16(n) XVCPSGNDP8(n) ; XVCPSGNDP8(n+8) 567#define XVCPSGNDP32(n) XVCPSGNDP16(n) ; XVCPSGNDP16(n+16) 568 XVCPSGNDP32(0) 569 570ALT_FTR_SECTION_END_IFCLR(CPU_FTR_ARCH_206) 571 572BEGIN_FTR_SECTION 573 b denorm_done 574END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) 575/* 576 * To denormalise we need to move a copy of the register to itself. 577 * For POWER8 we need to do that for all 64 VSX registers 578 */ 579 XVCPSGNDP32(32) 580denorm_done: 581 mtspr SPRN_HSRR0,r11 582 mtcrf 0x80,r9 583 ld r9,PACA_EXGEN+EX_R9(r13) 584 RESTORE_PPR_PACA(PACA_EXGEN, r10) 585BEGIN_FTR_SECTION 586 ld r10,PACA_EXGEN+EX_CFAR(r13) 587 mtspr SPRN_CFAR,r10 588END_FTR_SECTION_IFSET(CPU_FTR_CFAR) 589 ld r10,PACA_EXGEN+EX_R10(r13) 590 ld r11,PACA_EXGEN+EX_R11(r13) 591 ld r12,PACA_EXGEN+EX_R12(r13) 592 ld r13,PACA_EXGEN+EX_R13(r13) 593 HRFID 594 b . 595#endif 596 597 .align 7 598 /* moved from 0xe00 */ 599 STD_EXCEPTION_HV_OOL(0xe02, h_data_storage) 600 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0xe02) 601 STD_EXCEPTION_HV_OOL(0xe22, h_instr_storage) 602 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe22) 603 STD_EXCEPTION_HV_OOL(0xe42, emulation_assist) 604 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe42) 605 MASKABLE_EXCEPTION_HV_OOL(0xe62, hmi_exception) 606 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe62) 607 608 MASKABLE_EXCEPTION_HV_OOL(0xe82, h_doorbell) 609 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe82) 610 611 /* moved from 0xf00 */ 612 STD_EXCEPTION_PSERIES_OOL(0xf00, performance_monitor) 613 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf00) 614 STD_EXCEPTION_PSERIES_OOL(0xf20, altivec_unavailable) 615 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf20) 616 STD_EXCEPTION_PSERIES_OOL(0xf40, vsx_unavailable) 617 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf40) 618 STD_EXCEPTION_PSERIES_OOL(0xf60, facility_unavailable) 619 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf60) 620 STD_EXCEPTION_HV_OOL(0xf82, facility_unavailable) 621 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xf82) 622 623/* 624 * An interrupt came in while soft-disabled. We set paca->irq_happened, then: 625 * - If it was a decrementer interrupt, we bump the dec to max and and return. 626 * - If it was a doorbell we return immediately since doorbells are edge 627 * triggered and won't automatically refire. 628 * - If it was a HMI we return immediately since we handled it in realmode 629 * and it won't refire. 630 * - else we hard disable and return. 631 * This is called with r10 containing the value to OR to the paca field. 632 */ 633#define MASKED_INTERRUPT(_H) \ 634masked_##_H##interrupt: \ 635 std r11,PACA_EXGEN+EX_R11(r13); \ 636 lbz r11,PACAIRQHAPPENED(r13); \ 637 or r11,r11,r10; \ 638 stb r11,PACAIRQHAPPENED(r13); \ 639 cmpwi r10,PACA_IRQ_DEC; \ 640 bne 1f; \ 641 lis r10,0x7fff; \ 642 ori r10,r10,0xffff; \ 643 mtspr SPRN_DEC,r10; \ 644 b 2f; \ 6451: cmpwi r10,PACA_IRQ_DBELL; \ 646 beq 2f; \ 647 cmpwi r10,PACA_IRQ_HMI; \ 648 beq 2f; \ 649 mfspr r10,SPRN_##_H##SRR1; \ 650 rldicl r10,r10,48,1; /* clear MSR_EE */ \ 651 rotldi r10,r10,16; \ 652 mtspr SPRN_##_H##SRR1,r10; \ 6532: mtcrf 0x80,r9; \ 654 ld r9,PACA_EXGEN+EX_R9(r13); \ 655 ld r10,PACA_EXGEN+EX_R10(r13); \ 656 ld r11,PACA_EXGEN+EX_R11(r13); \ 657 GET_SCRATCH0(r13); \ 658 ##_H##rfid; \ 659 b . 660 661 MASKED_INTERRUPT() 662 MASKED_INTERRUPT(H) 663 664/* 665 * Called from arch_local_irq_enable when an interrupt needs 666 * to be resent. r3 contains 0x500, 0x900, 0xa00 or 0xe80 to indicate 667 * which kind of interrupt. MSR:EE is already off. We generate a 668 * stackframe like if a real interrupt had happened. 669 * 670 * Note: While MSR:EE is off, we need to make sure that _MSR 671 * in the generated frame has EE set to 1 or the exception 672 * handler will not properly re-enable them. 673 */ 674_GLOBAL(__replay_interrupt) 675 /* We are going to jump to the exception common code which 676 * will retrieve various register values from the PACA which 677 * we don't give a damn about, so we don't bother storing them. 678 */ 679 mfmsr r12 680 mflr r11 681 mfcr r9 682 ori r12,r12,MSR_EE 683 cmpwi r3,0x900 684 beq decrementer_common 685 cmpwi r3,0x500 686 beq hardware_interrupt_common 687BEGIN_FTR_SECTION 688 cmpwi r3,0xe80 689 beq h_doorbell_common 690FTR_SECTION_ELSE 691 cmpwi r3,0xa00 692 beq doorbell_super_common 693ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE) 694 blr 695 696#ifdef CONFIG_PPC_PSERIES 697/* 698 * Vectors for the FWNMI option. Share common code. 699 */ 700 .globl system_reset_fwnmi 701 .align 7 702system_reset_fwnmi: 703 HMT_MEDIUM_PPR_DISCARD 704 SET_SCRATCH0(r13) /* save r13 */ 705 EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common, EXC_STD, 706 NOTEST, 0x100) 707 708#endif /* CONFIG_PPC_PSERIES */ 709 710#ifdef __DISABLED__ 711/* 712 * This is used for when the SLB miss handler has to go virtual, 713 * which doesn't happen for now anymore but will once we re-implement 714 * dynamic VSIDs for shared page tables 715 */ 716slb_miss_user_pseries: 717 std r10,PACA_EXGEN+EX_R10(r13) 718 std r11,PACA_EXGEN+EX_R11(r13) 719 std r12,PACA_EXGEN+EX_R12(r13) 720 GET_SCRATCH0(r10) 721 ld r11,PACA_EXSLB+EX_R9(r13) 722 ld r12,PACA_EXSLB+EX_R3(r13) 723 std r10,PACA_EXGEN+EX_R13(r13) 724 std r11,PACA_EXGEN+EX_R9(r13) 725 std r12,PACA_EXGEN+EX_R3(r13) 726 clrrdi r12,r13,32 727 mfmsr r10 728 mfspr r11,SRR0 /* save SRR0 */ 729 ori r12,r12,slb_miss_user_common@l /* virt addr of handler */ 730 ori r10,r10,MSR_IR|MSR_DR|MSR_RI 731 mtspr SRR0,r12 732 mfspr r12,SRR1 /* and SRR1 */ 733 mtspr SRR1,r10 734 rfid 735 b . /* prevent spec. execution */ 736#endif /* __DISABLED__ */ 737 738#ifdef CONFIG_KVM_BOOK3S_64_HANDLER 739kvmppc_skip_interrupt: 740 /* 741 * Here all GPRs are unchanged from when the interrupt happened 742 * except for r13, which is saved in SPRG_SCRATCH0. 743 */ 744 mfspr r13, SPRN_SRR0 745 addi r13, r13, 4 746 mtspr SPRN_SRR0, r13 747 GET_SCRATCH0(r13) 748 rfid 749 b . 750 751kvmppc_skip_Hinterrupt: 752 /* 753 * Here all GPRs are unchanged from when the interrupt happened 754 * except for r13, which is saved in SPRG_SCRATCH0. 755 */ 756 mfspr r13, SPRN_HSRR0 757 addi r13, r13, 4 758 mtspr SPRN_HSRR0, r13 759 GET_SCRATCH0(r13) 760 hrfid 761 b . 762#endif 763 764/* 765 * Code from here down to __end_handlers is invoked from the 766 * exception prologs above. Because the prologs assemble the 767 * addresses of these handlers using the LOAD_HANDLER macro, 768 * which uses an ori instruction, these handlers must be in 769 * the first 64k of the kernel image. 770 */ 771 772/*** Common interrupt handlers ***/ 773 774 STD_EXCEPTION_COMMON(0x100, system_reset, system_reset_exception) 775 776 STD_EXCEPTION_COMMON_ASYNC(0x500, hardware_interrupt, do_IRQ) 777 STD_EXCEPTION_COMMON_ASYNC(0x900, decrementer, timer_interrupt) 778 STD_EXCEPTION_COMMON(0x980, hdecrementer, hdec_interrupt) 779#ifdef CONFIG_PPC_DOORBELL 780 STD_EXCEPTION_COMMON_ASYNC(0xa00, doorbell_super, doorbell_exception) 781#else 782 STD_EXCEPTION_COMMON_ASYNC(0xa00, doorbell_super, unknown_exception) 783#endif 784 STD_EXCEPTION_COMMON(0xb00, trap_0b, unknown_exception) 785 STD_EXCEPTION_COMMON(0xd00, single_step, single_step_exception) 786 STD_EXCEPTION_COMMON(0xe00, trap_0e, unknown_exception) 787 STD_EXCEPTION_COMMON(0xe40, emulation_assist, emulation_assist_interrupt) 788 STD_EXCEPTION_COMMON_ASYNC(0xe60, hmi_exception, handle_hmi_exception) 789#ifdef CONFIG_PPC_DOORBELL 790 STD_EXCEPTION_COMMON_ASYNC(0xe80, h_doorbell, doorbell_exception) 791#else 792 STD_EXCEPTION_COMMON_ASYNC(0xe80, h_doorbell, unknown_exception) 793#endif 794 STD_EXCEPTION_COMMON_ASYNC(0xf00, performance_monitor, performance_monitor_exception) 795 STD_EXCEPTION_COMMON(0x1300, instruction_breakpoint, instruction_breakpoint_exception) 796 STD_EXCEPTION_COMMON(0x1502, denorm, unknown_exception) 797#ifdef CONFIG_ALTIVEC 798 STD_EXCEPTION_COMMON(0x1700, altivec_assist, altivec_assist_exception) 799#else 800 STD_EXCEPTION_COMMON(0x1700, altivec_assist, unknown_exception) 801#endif 802#ifdef CONFIG_CBE_RAS 803 STD_EXCEPTION_COMMON(0x1200, cbe_system_error, cbe_system_error_exception) 804 STD_EXCEPTION_COMMON(0x1600, cbe_maintenance, cbe_maintenance_exception) 805 STD_EXCEPTION_COMMON(0x1800, cbe_thermal, cbe_thermal_exception) 806#endif /* CONFIG_CBE_RAS */ 807 808 /* 809 * Relocation-on interrupts: A subset of the interrupts can be delivered 810 * with IR=1/DR=1, if AIL==2 and MSR.HV won't be changed by delivering 811 * it. Addresses are the same as the original interrupt addresses, but 812 * offset by 0xc000000000004000. 813 * It's impossible to receive interrupts below 0x300 via this mechanism. 814 * KVM: None of these traps are from the guest ; anything that escalated 815 * to HV=1 from HV=0 is delivered via real mode handlers. 816 */ 817 818 /* 819 * This uses the standard macro, since the original 0x300 vector 820 * only has extra guff for STAB-based processors -- which never 821 * come here. 822 */ 823 STD_RELON_EXCEPTION_PSERIES(0x4300, 0x300, data_access) 824 . = 0x4380 825 .globl data_access_slb_relon_pSeries 826data_access_slb_relon_pSeries: 827 SET_SCRATCH0(r13) 828 EXCEPTION_PROLOG_0(PACA_EXSLB) 829 EXCEPTION_PROLOG_1(PACA_EXSLB, NOTEST, 0x380) 830 std r3,PACA_EXSLB+EX_R3(r13) 831 mfspr r3,SPRN_DAR 832 mfspr r12,SPRN_SRR1 833#ifndef CONFIG_RELOCATABLE 834 b slb_miss_realmode 835#else 836 /* 837 * We can't just use a direct branch to slb_miss_realmode 838 * because the distance from here to there depends on where 839 * the kernel ends up being put. 840 */ 841 mfctr r11 842 ld r10,PACAKBASE(r13) 843 LOAD_HANDLER(r10, slb_miss_realmode) 844 mtctr r10 845 bctr 846#endif 847 848 STD_RELON_EXCEPTION_PSERIES(0x4400, 0x400, instruction_access) 849 . = 0x4480 850 .globl instruction_access_slb_relon_pSeries 851instruction_access_slb_relon_pSeries: 852 SET_SCRATCH0(r13) 853 EXCEPTION_PROLOG_0(PACA_EXSLB) 854 EXCEPTION_PROLOG_1(PACA_EXSLB, NOTEST, 0x480) 855 std r3,PACA_EXSLB+EX_R3(r13) 856 mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */ 857 mfspr r12,SPRN_SRR1 858#ifndef CONFIG_RELOCATABLE 859 b slb_miss_realmode 860#else 861 mfctr r11 862 ld r10,PACAKBASE(r13) 863 LOAD_HANDLER(r10, slb_miss_realmode) 864 mtctr r10 865 bctr 866#endif 867 868 . = 0x4500 869 .globl hardware_interrupt_relon_pSeries; 870 .globl hardware_interrupt_relon_hv; 871hardware_interrupt_relon_pSeries: 872hardware_interrupt_relon_hv: 873 BEGIN_FTR_SECTION 874 _MASKABLE_RELON_EXCEPTION_PSERIES(0x502, hardware_interrupt, EXC_HV, SOFTEN_TEST_HV) 875 FTR_SECTION_ELSE 876 _MASKABLE_RELON_EXCEPTION_PSERIES(0x500, hardware_interrupt, EXC_STD, SOFTEN_TEST_PR) 877 ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE) 878 STD_RELON_EXCEPTION_PSERIES(0x4600, 0x600, alignment) 879 STD_RELON_EXCEPTION_PSERIES(0x4700, 0x700, program_check) 880 STD_RELON_EXCEPTION_PSERIES(0x4800, 0x800, fp_unavailable) 881 MASKABLE_RELON_EXCEPTION_PSERIES(0x4900, 0x900, decrementer) 882 STD_RELON_EXCEPTION_HV(0x4980, 0x982, hdecrementer) 883 MASKABLE_RELON_EXCEPTION_PSERIES(0x4a00, 0xa00, doorbell_super) 884 STD_RELON_EXCEPTION_PSERIES(0x4b00, 0xb00, trap_0b) 885 886 . = 0x4c00 887 .globl system_call_relon_pSeries 888system_call_relon_pSeries: 889 HMT_MEDIUM 890 SYSCALL_PSERIES_1 891 SYSCALL_PSERIES_2_DIRECT 892 SYSCALL_PSERIES_3 893 894 STD_RELON_EXCEPTION_PSERIES(0x4d00, 0xd00, single_step) 895 896 . = 0x4e00 897 b . /* Can't happen, see v2.07 Book III-S section 6.5 */ 898 899 . = 0x4e20 900 b . /* Can't happen, see v2.07 Book III-S section 6.5 */ 901 902 . = 0x4e40 903emulation_assist_relon_trampoline: 904 SET_SCRATCH0(r13) 905 EXCEPTION_PROLOG_0(PACA_EXGEN) 906 b emulation_assist_relon_hv 907 908 . = 0x4e60 909 b . /* Can't happen, see v2.07 Book III-S section 6.5 */ 910 911 . = 0x4e80 912h_doorbell_relon_trampoline: 913 SET_SCRATCH0(r13) 914 EXCEPTION_PROLOG_0(PACA_EXGEN) 915 b h_doorbell_relon_hv 916 917 . = 0x4f00 918performance_monitor_relon_pseries_trampoline: 919 SET_SCRATCH0(r13) 920 EXCEPTION_PROLOG_0(PACA_EXGEN) 921 b performance_monitor_relon_pSeries 922 923 . = 0x4f20 924altivec_unavailable_relon_pseries_trampoline: 925 SET_SCRATCH0(r13) 926 EXCEPTION_PROLOG_0(PACA_EXGEN) 927 b altivec_unavailable_relon_pSeries 928 929 . = 0x4f40 930vsx_unavailable_relon_pseries_trampoline: 931 SET_SCRATCH0(r13) 932 EXCEPTION_PROLOG_0(PACA_EXGEN) 933 b vsx_unavailable_relon_pSeries 934 935 . = 0x4f60 936facility_unavailable_relon_trampoline: 937 SET_SCRATCH0(r13) 938 EXCEPTION_PROLOG_0(PACA_EXGEN) 939 b facility_unavailable_relon_pSeries 940 941 . = 0x4f80 942hv_facility_unavailable_relon_trampoline: 943 SET_SCRATCH0(r13) 944 EXCEPTION_PROLOG_0(PACA_EXGEN) 945 b hv_facility_unavailable_relon_hv 946 947 STD_RELON_EXCEPTION_PSERIES(0x5300, 0x1300, instruction_breakpoint) 948#ifdef CONFIG_PPC_DENORMALISATION 949 . = 0x5500 950 b denorm_exception_hv 951#endif 952 STD_RELON_EXCEPTION_PSERIES(0x5700, 0x1700, altivec_assist) 953 954 /* Other future vectors */ 955 .align 7 956 .globl __end_interrupts 957__end_interrupts: 958 959 .align 7 960system_call_entry_direct: 961#if defined(CONFIG_RELOCATABLE) 962 /* The first level prologue may have used LR to get here, saving 963 * orig in r10. To save hacking/ifdeffing common code, restore here. 964 */ 965 mtlr r10 966#endif 967system_call_entry: 968 b system_call_common 969 970ppc64_runlatch_on_trampoline: 971 b __ppc64_runlatch_on 972 973/* 974 * Here r13 points to the paca, r9 contains the saved CR, 975 * SRR0 and SRR1 are saved in r11 and r12, 976 * r9 - r13 are saved in paca->exgen. 977 */ 978 .align 7 979 .globl data_access_common 980data_access_common: 981 mfspr r10,SPRN_DAR 982 std r10,PACA_EXGEN+EX_DAR(r13) 983 mfspr r10,SPRN_DSISR 984 stw r10,PACA_EXGEN+EX_DSISR(r13) 985 EXCEPTION_PROLOG_COMMON(0x300, PACA_EXGEN) 986 RECONCILE_IRQ_STATE(r10, r11) 987 ld r12,_MSR(r1) 988 ld r3,PACA_EXGEN+EX_DAR(r13) 989 lwz r4,PACA_EXGEN+EX_DSISR(r13) 990 li r5,0x300 991 b do_hash_page /* Try to handle as hpte fault */ 992 993 .align 7 994 .globl h_data_storage_common 995h_data_storage_common: 996 mfspr r10,SPRN_HDAR 997 std r10,PACA_EXGEN+EX_DAR(r13) 998 mfspr r10,SPRN_HDSISR 999 stw r10,PACA_EXGEN+EX_DSISR(r13) 1000 EXCEPTION_PROLOG_COMMON(0xe00, PACA_EXGEN) 1001 bl save_nvgprs 1002 RECONCILE_IRQ_STATE(r10, r11) 1003 addi r3,r1,STACK_FRAME_OVERHEAD 1004 bl unknown_exception 1005 b ret_from_except 1006 1007 .align 7 1008 .globl instruction_access_common 1009instruction_access_common: 1010 EXCEPTION_PROLOG_COMMON(0x400, PACA_EXGEN) 1011 RECONCILE_IRQ_STATE(r10, r11) 1012 ld r12,_MSR(r1) 1013 ld r3,_NIP(r1) 1014 andis. r4,r12,0x5820 1015 li r5,0x400 1016 b do_hash_page /* Try to handle as hpte fault */ 1017 1018 STD_EXCEPTION_COMMON(0xe20, h_instr_storage, unknown_exception) 1019 1020/* 1021 * Here is the common SLB miss user that is used when going to virtual 1022 * mode for SLB misses, that is currently not used 1023 */ 1024#ifdef __DISABLED__ 1025 .align 7 1026 .globl slb_miss_user_common 1027slb_miss_user_common: 1028 mflr r10 1029 std r3,PACA_EXGEN+EX_DAR(r13) 1030 stw r9,PACA_EXGEN+EX_CCR(r13) 1031 std r10,PACA_EXGEN+EX_LR(r13) 1032 std r11,PACA_EXGEN+EX_SRR0(r13) 1033 bl slb_allocate_user 1034 1035 ld r10,PACA_EXGEN+EX_LR(r13) 1036 ld r3,PACA_EXGEN+EX_R3(r13) 1037 lwz r9,PACA_EXGEN+EX_CCR(r13) 1038 ld r11,PACA_EXGEN+EX_SRR0(r13) 1039 mtlr r10 1040 beq- slb_miss_fault 1041 1042 andi. r10,r12,MSR_RI /* check for unrecoverable exception */ 1043 beq- unrecov_user_slb 1044 mfmsr r10 1045 1046.machine push 1047.machine "power4" 1048 mtcrf 0x80,r9 1049.machine pop 1050 1051 clrrdi r10,r10,2 /* clear RI before setting SRR0/1 */ 1052 mtmsrd r10,1 1053 1054 mtspr SRR0,r11 1055 mtspr SRR1,r12 1056 1057 ld r9,PACA_EXGEN+EX_R9(r13) 1058 ld r10,PACA_EXGEN+EX_R10(r13) 1059 ld r11,PACA_EXGEN+EX_R11(r13) 1060 ld r12,PACA_EXGEN+EX_R12(r13) 1061 ld r13,PACA_EXGEN+EX_R13(r13) 1062 rfid 1063 b . 1064 1065slb_miss_fault: 1066 EXCEPTION_PROLOG_COMMON(0x380, PACA_EXGEN) 1067 ld r4,PACA_EXGEN+EX_DAR(r13) 1068 li r5,0 1069 std r4,_DAR(r1) 1070 std r5,_DSISR(r1) 1071 b handle_page_fault 1072 1073unrecov_user_slb: 1074 EXCEPTION_PROLOG_COMMON(0x4200, PACA_EXGEN) 1075 RECONCILE_IRQ_STATE(r10, r11) 1076 bl save_nvgprs 10771: addi r3,r1,STACK_FRAME_OVERHEAD 1078 bl unrecoverable_exception 1079 b 1b 1080 1081#endif /* __DISABLED__ */ 1082 1083 1084 /* 1085 * Machine check is different because we use a different 1086 * save area: PACA_EXMC instead of PACA_EXGEN. 1087 */ 1088 .align 7 1089 .globl machine_check_common 1090machine_check_common: 1091 1092 mfspr r10,SPRN_DAR 1093 std r10,PACA_EXGEN+EX_DAR(r13) 1094 mfspr r10,SPRN_DSISR 1095 stw r10,PACA_EXGEN+EX_DSISR(r13) 1096 EXCEPTION_PROLOG_COMMON(0x200, PACA_EXMC) 1097 FINISH_NAP 1098 RECONCILE_IRQ_STATE(r10, r11) 1099 ld r3,PACA_EXGEN+EX_DAR(r13) 1100 lwz r4,PACA_EXGEN+EX_DSISR(r13) 1101 std r3,_DAR(r1) 1102 std r4,_DSISR(r1) 1103 bl save_nvgprs 1104 addi r3,r1,STACK_FRAME_OVERHEAD 1105 bl machine_check_exception 1106 b ret_from_except 1107 1108 .align 7 1109 .globl alignment_common 1110alignment_common: 1111 mfspr r10,SPRN_DAR 1112 std r10,PACA_EXGEN+EX_DAR(r13) 1113 mfspr r10,SPRN_DSISR 1114 stw r10,PACA_EXGEN+EX_DSISR(r13) 1115 EXCEPTION_PROLOG_COMMON(0x600, PACA_EXGEN) 1116 ld r3,PACA_EXGEN+EX_DAR(r13) 1117 lwz r4,PACA_EXGEN+EX_DSISR(r13) 1118 std r3,_DAR(r1) 1119 std r4,_DSISR(r1) 1120 bl save_nvgprs 1121 RECONCILE_IRQ_STATE(r10, r11) 1122 addi r3,r1,STACK_FRAME_OVERHEAD 1123 bl alignment_exception 1124 b ret_from_except 1125 1126 .align 7 1127 .globl program_check_common 1128program_check_common: 1129 EXCEPTION_PROLOG_COMMON(0x700, PACA_EXGEN) 1130 bl save_nvgprs 1131 RECONCILE_IRQ_STATE(r10, r11) 1132 addi r3,r1,STACK_FRAME_OVERHEAD 1133 bl program_check_exception 1134 b ret_from_except 1135 1136 .align 7 1137 .globl fp_unavailable_common 1138fp_unavailable_common: 1139 EXCEPTION_PROLOG_COMMON(0x800, PACA_EXGEN) 1140 bne 1f /* if from user, just load it up */ 1141 bl save_nvgprs 1142 RECONCILE_IRQ_STATE(r10, r11) 1143 addi r3,r1,STACK_FRAME_OVERHEAD 1144 bl kernel_fp_unavailable_exception 1145 BUG_OPCODE 11461: 1147#ifdef CONFIG_PPC_TRANSACTIONAL_MEM 1148BEGIN_FTR_SECTION 1149 /* Test if 2 TM state bits are zero. If non-zero (ie. userspace was in 1150 * transaction), go do TM stuff 1151 */ 1152 rldicl. r0, r12, (64-MSR_TS_LG), (64-2) 1153 bne- 2f 1154END_FTR_SECTION_IFSET(CPU_FTR_TM) 1155#endif 1156 bl load_up_fpu 1157 b fast_exception_return 1158#ifdef CONFIG_PPC_TRANSACTIONAL_MEM 11592: /* User process was in a transaction */ 1160 bl save_nvgprs 1161 RECONCILE_IRQ_STATE(r10, r11) 1162 addi r3,r1,STACK_FRAME_OVERHEAD 1163 bl fp_unavailable_tm 1164 b ret_from_except 1165#endif 1166 .align 7 1167 .globl altivec_unavailable_common 1168altivec_unavailable_common: 1169 EXCEPTION_PROLOG_COMMON(0xf20, PACA_EXGEN) 1170#ifdef CONFIG_ALTIVEC 1171BEGIN_FTR_SECTION 1172 beq 1f 1173#ifdef CONFIG_PPC_TRANSACTIONAL_MEM 1174 BEGIN_FTR_SECTION_NESTED(69) 1175 /* Test if 2 TM state bits are zero. If non-zero (ie. userspace was in 1176 * transaction), go do TM stuff 1177 */ 1178 rldicl. r0, r12, (64-MSR_TS_LG), (64-2) 1179 bne- 2f 1180 END_FTR_SECTION_NESTED(CPU_FTR_TM, CPU_FTR_TM, 69) 1181#endif 1182 bl load_up_altivec 1183 b fast_exception_return 1184#ifdef CONFIG_PPC_TRANSACTIONAL_MEM 11852: /* User process was in a transaction */ 1186 bl save_nvgprs 1187 RECONCILE_IRQ_STATE(r10, r11) 1188 addi r3,r1,STACK_FRAME_OVERHEAD 1189 bl altivec_unavailable_tm 1190 b ret_from_except 1191#endif 11921: 1193END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) 1194#endif 1195 bl save_nvgprs 1196 RECONCILE_IRQ_STATE(r10, r11) 1197 addi r3,r1,STACK_FRAME_OVERHEAD 1198 bl altivec_unavailable_exception 1199 b ret_from_except 1200 1201 .align 7 1202 .globl vsx_unavailable_common 1203vsx_unavailable_common: 1204 EXCEPTION_PROLOG_COMMON(0xf40, PACA_EXGEN) 1205#ifdef CONFIG_VSX 1206BEGIN_FTR_SECTION 1207 beq 1f 1208#ifdef CONFIG_PPC_TRANSACTIONAL_MEM 1209 BEGIN_FTR_SECTION_NESTED(69) 1210 /* Test if 2 TM state bits are zero. If non-zero (ie. userspace was in 1211 * transaction), go do TM stuff 1212 */ 1213 rldicl. r0, r12, (64-MSR_TS_LG), (64-2) 1214 bne- 2f 1215 END_FTR_SECTION_NESTED(CPU_FTR_TM, CPU_FTR_TM, 69) 1216#endif 1217 b load_up_vsx 1218#ifdef CONFIG_PPC_TRANSACTIONAL_MEM 12192: /* User process was in a transaction */ 1220 bl save_nvgprs 1221 RECONCILE_IRQ_STATE(r10, r11) 1222 addi r3,r1,STACK_FRAME_OVERHEAD 1223 bl vsx_unavailable_tm 1224 b ret_from_except 1225#endif 12261: 1227END_FTR_SECTION_IFSET(CPU_FTR_VSX) 1228#endif 1229 bl save_nvgprs 1230 RECONCILE_IRQ_STATE(r10, r11) 1231 addi r3,r1,STACK_FRAME_OVERHEAD 1232 bl vsx_unavailable_exception 1233 b ret_from_except 1234 1235 STD_EXCEPTION_COMMON(0xf60, facility_unavailable, facility_unavailable_exception) 1236 STD_EXCEPTION_COMMON(0xf80, hv_facility_unavailable, facility_unavailable_exception) 1237 1238 .align 7 1239 .globl __end_handlers 1240__end_handlers: 1241 1242 /* Equivalents to the above handlers for relocation-on interrupt vectors */ 1243 STD_RELON_EXCEPTION_HV_OOL(0xe40, emulation_assist) 1244 MASKABLE_RELON_EXCEPTION_HV_OOL(0xe80, h_doorbell) 1245 1246 STD_RELON_EXCEPTION_PSERIES_OOL(0xf00, performance_monitor) 1247 STD_RELON_EXCEPTION_PSERIES_OOL(0xf20, altivec_unavailable) 1248 STD_RELON_EXCEPTION_PSERIES_OOL(0xf40, vsx_unavailable) 1249 STD_RELON_EXCEPTION_PSERIES_OOL(0xf60, facility_unavailable) 1250 STD_RELON_EXCEPTION_HV_OOL(0xf80, hv_facility_unavailable) 1251 1252#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) 1253/* 1254 * Data area reserved for FWNMI option. 1255 * This address (0x7000) is fixed by the RPA. 1256 */ 1257 .= 0x7000 1258 .globl fwnmi_data_area 1259fwnmi_data_area: 1260 1261 /* pseries and powernv need to keep the whole page from 1262 * 0x7000 to 0x8000 free for use by the firmware 1263 */ 1264 . = 0x8000 1265#endif /* defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) */ 1266 1267 .globl hmi_exception_early 1268hmi_exception_early: 1269 EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, 0xe60) 1270 mr r10,r1 /* Save r1 */ 1271 ld r1,PACAEMERGSP(r13) /* Use emergency stack */ 1272 subi r1,r1,INT_FRAME_SIZE /* alloc stack frame */ 1273 std r9,_CCR(r1) /* save CR in stackframe */ 1274 mfspr r11,SPRN_HSRR0 /* Save HSRR0 */ 1275 std r11,_NIP(r1) /* save HSRR0 in stackframe */ 1276 mfspr r12,SPRN_HSRR1 /* Save SRR1 */ 1277 std r12,_MSR(r1) /* save SRR1 in stackframe */ 1278 std r10,0(r1) /* make stack chain pointer */ 1279 std r0,GPR0(r1) /* save r0 in stackframe */ 1280 std r10,GPR1(r1) /* save r1 in stackframe */ 1281 EXCEPTION_PROLOG_COMMON_2(PACA_EXGEN) 1282 EXCEPTION_PROLOG_COMMON_3(0xe60) 1283 addi r3,r1,STACK_FRAME_OVERHEAD 1284 bl hmi_exception_realmode 1285 /* Windup the stack. */ 1286 /* Move original HSRR0 and HSRR1 into the respective regs */ 1287 ld r9,_MSR(r1) 1288 mtspr SPRN_HSRR1,r9 1289 ld r3,_NIP(r1) 1290 mtspr SPRN_HSRR0,r3 1291 ld r9,_CTR(r1) 1292 mtctr r9 1293 ld r9,_XER(r1) 1294 mtxer r9 1295 ld r9,_LINK(r1) 1296 mtlr r9 1297 REST_GPR(0, r1) 1298 REST_8GPRS(2, r1) 1299 REST_GPR(10, r1) 1300 ld r11,_CCR(r1) 1301 mtcr r11 1302 REST_GPR(11, r1) 1303 REST_2GPRS(12, r1) 1304 /* restore original r1. */ 1305 ld r1,GPR1(r1) 1306 1307 /* 1308 * Go to virtual mode and pull the HMI event information from 1309 * firmware. 1310 */ 1311 .globl hmi_exception_after_realmode 1312hmi_exception_after_realmode: 1313 SET_SCRATCH0(r13) 1314 EXCEPTION_PROLOG_0(PACA_EXGEN) 1315 b hmi_exception_hv 1316 1317 1318#define MACHINE_CHECK_HANDLER_WINDUP \ 1319 /* Clear MSR_RI before setting SRR0 and SRR1. */\ 1320 li r0,MSR_RI; \ 1321 mfmsr r9; /* get MSR value */ \ 1322 andc r9,r9,r0; \ 1323 mtmsrd r9,1; /* Clear MSR_RI */ \ 1324 /* Move original SRR0 and SRR1 into the respective regs */ \ 1325 ld r9,_MSR(r1); \ 1326 mtspr SPRN_SRR1,r9; \ 1327 ld r3,_NIP(r1); \ 1328 mtspr SPRN_SRR0,r3; \ 1329 ld r9,_CTR(r1); \ 1330 mtctr r9; \ 1331 ld r9,_XER(r1); \ 1332 mtxer r9; \ 1333 ld r9,_LINK(r1); \ 1334 mtlr r9; \ 1335 REST_GPR(0, r1); \ 1336 REST_8GPRS(2, r1); \ 1337 REST_GPR(10, r1); \ 1338 ld r11,_CCR(r1); \ 1339 mtcr r11; \ 1340 /* Decrement paca->in_mce. */ \ 1341 lhz r12,PACA_IN_MCE(r13); \ 1342 subi r12,r12,1; \ 1343 sth r12,PACA_IN_MCE(r13); \ 1344 REST_GPR(11, r1); \ 1345 REST_2GPRS(12, r1); \ 1346 /* restore original r1. */ \ 1347 ld r1,GPR1(r1) 1348 1349 /* 1350 * Handle machine check early in real mode. We come here with 1351 * ME=1, MMU (IR=0 and DR=0) off and using MC emergency stack. 1352 */ 1353 .align 7 1354 .globl machine_check_handle_early 1355machine_check_handle_early: 1356 std r0,GPR0(r1) /* Save r0 */ 1357 EXCEPTION_PROLOG_COMMON_3(0x200) 1358 bl save_nvgprs 1359 addi r3,r1,STACK_FRAME_OVERHEAD 1360 bl machine_check_early 1361 std r3,RESULT(r1) /* Save result */ 1362 ld r12,_MSR(r1) 1363#ifdef CONFIG_PPC_P7_NAP 1364 /* 1365 * Check if thread was in power saving mode. We come here when any 1366 * of the following is true: 1367 * a. thread wasn't in power saving mode 1368 * b. thread was in power saving mode with no state loss or 1369 * supervisor state loss 1370 * 1371 * Go back to nap again if (b) is true. 1372 */ 1373 rlwinm. r11,r12,47-31,30,31 /* Was it in power saving mode? */ 1374 beq 4f /* No, it wasn;t */ 1375 /* Thread was in power saving mode. Go back to nap again. */ 1376 cmpwi r11,2 1377 bne 3f 1378 /* Supervisor state loss */ 1379 li r0,1 1380 stb r0,PACA_NAPSTATELOST(r13) 13813: bl machine_check_queue_event 1382 MACHINE_CHECK_HANDLER_WINDUP 1383 GET_PACA(r13) 1384 ld r1,PACAR1(r13) 1385 b power7_enter_nap_mode 13864: 1387#endif 1388 /* 1389 * Check if we are coming from hypervisor userspace. If yes then we 1390 * continue in host kernel in V mode to deliver the MC event. 1391 */ 1392 rldicl. r11,r12,4,63 /* See if MC hit while in HV mode. */ 1393 beq 5f 1394 andi. r11,r12,MSR_PR /* See if coming from user. */ 1395 bne 9f /* continue in V mode if we are. */ 1396 13975: 1398#ifdef CONFIG_KVM_BOOK3S_64_HV 1399 /* 1400 * We are coming from kernel context. Check if we are coming from 1401 * guest. if yes, then we can continue. We will fall through 1402 * do_kvm_200->kvmppc_interrupt to deliver the MC event to guest. 1403 */ 1404 lbz r11,HSTATE_IN_GUEST(r13) 1405 cmpwi r11,0 /* Check if coming from guest */ 1406 bne 9f /* continue if we are. */ 1407#endif 1408 /* 1409 * At this point we are not sure about what context we come from. 1410 * Queue up the MCE event and return from the interrupt. 1411 * But before that, check if this is an un-recoverable exception. 1412 * If yes, then stay on emergency stack and panic. 1413 */ 1414 andi. r11,r12,MSR_RI 1415 bne 2f 14161: mfspr r11,SPRN_SRR0 1417 ld r10,PACAKBASE(r13) 1418 LOAD_HANDLER(r10,unrecover_mce) 1419 mtspr SPRN_SRR0,r10 1420 ld r10,PACAKMSR(r13) 1421 /* 1422 * We are going down. But there are chances that we might get hit by 1423 * another MCE during panic path and we may run into unstable state 1424 * with no way out. Hence, turn ME bit off while going down, so that 1425 * when another MCE is hit during panic path, system will checkstop 1426 * and hypervisor will get restarted cleanly by SP. 1427 */ 1428 li r3,MSR_ME 1429 andc r10,r10,r3 /* Turn off MSR_ME */ 1430 mtspr SPRN_SRR1,r10 1431 rfid 1432 b . 14332: 1434 /* 1435 * Check if we have successfully handled/recovered from error, if not 1436 * then stay on emergency stack and panic. 1437 */ 1438 ld r3,RESULT(r1) /* Load result */ 1439 cmpdi r3,0 /* see if we handled MCE successfully */ 1440 1441 beq 1b /* if !handled then panic */ 1442 /* 1443 * Return from MC interrupt. 1444 * Queue up the MCE event so that we can log it later, while 1445 * returning from kernel or opal call. 1446 */ 1447 bl machine_check_queue_event 1448 MACHINE_CHECK_HANDLER_WINDUP 1449 rfid 14509: 1451 /* Deliver the machine check to host kernel in V mode. */ 1452 MACHINE_CHECK_HANDLER_WINDUP 1453 b machine_check_pSeries 1454 1455unrecover_mce: 1456 /* Invoke machine_check_exception to print MCE event and panic. */ 1457 addi r3,r1,STACK_FRAME_OVERHEAD 1458 bl machine_check_exception 1459 /* 1460 * We will not reach here. Even if we did, there is no way out. Call 1461 * unrecoverable_exception and die. 1462 */ 14631: addi r3,r1,STACK_FRAME_OVERHEAD 1464 bl unrecoverable_exception 1465 b 1b 1466/* 1467 * r13 points to the PACA, r9 contains the saved CR, 1468 * r12 contain the saved SRR1, SRR0 is still ready for return 1469 * r3 has the faulting address 1470 * r9 - r13 are saved in paca->exslb. 1471 * r3 is saved in paca->slb_r3 1472 * We assume we aren't going to take any exceptions during this procedure. 1473 */ 1474slb_miss_realmode: 1475 mflr r10 1476#ifdef CONFIG_RELOCATABLE 1477 mtctr r11 1478#endif 1479 1480 stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */ 1481 std r10,PACA_EXSLB+EX_LR(r13) /* save LR */ 1482 1483 bl slb_allocate_realmode 1484 1485 /* All done -- return from exception. */ 1486 1487 ld r10,PACA_EXSLB+EX_LR(r13) 1488 ld r3,PACA_EXSLB+EX_R3(r13) 1489 lwz r9,PACA_EXSLB+EX_CCR(r13) /* get saved CR */ 1490 1491 mtlr r10 1492 1493 andi. r10,r12,MSR_RI /* check for unrecoverable exception */ 1494 beq- 2f 1495 1496.machine push 1497.machine "power4" 1498 mtcrf 0x80,r9 1499 mtcrf 0x01,r9 /* slb_allocate uses cr0 and cr7 */ 1500.machine pop 1501 1502 RESTORE_PPR_PACA(PACA_EXSLB, r9) 1503 ld r9,PACA_EXSLB+EX_R9(r13) 1504 ld r10,PACA_EXSLB+EX_R10(r13) 1505 ld r11,PACA_EXSLB+EX_R11(r13) 1506 ld r12,PACA_EXSLB+EX_R12(r13) 1507 ld r13,PACA_EXSLB+EX_R13(r13) 1508 rfid 1509 b . /* prevent speculative execution */ 1510 15112: mfspr r11,SPRN_SRR0 1512 ld r10,PACAKBASE(r13) 1513 LOAD_HANDLER(r10,unrecov_slb) 1514 mtspr SPRN_SRR0,r10 1515 ld r10,PACAKMSR(r13) 1516 mtspr SPRN_SRR1,r10 1517 rfid 1518 b . 1519 1520unrecov_slb: 1521 EXCEPTION_PROLOG_COMMON(0x4100, PACA_EXSLB) 1522 RECONCILE_IRQ_STATE(r10, r11) 1523 bl save_nvgprs 15241: addi r3,r1,STACK_FRAME_OVERHEAD 1525 bl unrecoverable_exception 1526 b 1b 1527 1528 1529#ifdef CONFIG_PPC_970_NAP 1530power4_fixup_nap: 1531 andc r9,r9,r10 1532 std r9,TI_LOCAL_FLAGS(r11) 1533 ld r10,_LINK(r1) /* make idle task do the */ 1534 std r10,_NIP(r1) /* equivalent of a blr */ 1535 blr 1536#endif 1537 1538/* 1539 * Hash table stuff 1540 */ 1541 .align 7 1542do_hash_page: 1543 std r3,_DAR(r1) 1544 std r4,_DSISR(r1) 1545 1546 andis. r0,r4,0xa410 /* weird error? */ 1547 bne- handle_page_fault /* if not, try to insert a HPTE */ 1548 andis. r0,r4,DSISR_DABRMATCH@h 1549 bne- handle_dabr_fault 1550 CURRENT_THREAD_INFO(r11, r1) 1551 lwz r0,TI_PREEMPT(r11) /* If we're in an "NMI" */ 1552 andis. r0,r0,NMI_MASK@h /* (i.e. an irq when soft-disabled) */ 1553 bne 77f /* then don't call hash_page now */ 1554 /* 1555 * We need to set the _PAGE_USER bit if MSR_PR is set or if we are 1556 * accessing a userspace segment (even from the kernel). We assume 1557 * kernel addresses always have the high bit set. 1558 */ 1559 rlwinm r4,r4,32-25+9,31-9,31-9 /* DSISR_STORE -> _PAGE_RW */ 1560 rotldi r0,r3,15 /* Move high bit into MSR_PR posn */ 1561 orc r0,r12,r0 /* MSR_PR | ~high_bit */ 1562 rlwimi r4,r0,32-13,30,30 /* becomes _PAGE_USER access bit */ 1563 ori r4,r4,1 /* add _PAGE_PRESENT */ 1564 rlwimi r4,r5,22+2,31-2,31-2 /* Set _PAGE_EXEC if trap is 0x400 */ 1565 1566 /* 1567 * r3 contains the faulting address 1568 * r4 contains the required access permissions 1569 * r5 contains the trap number 1570 * r6 contains dsisr 1571 * 1572 * at return r3 = 0 for success, 1 for page fault, negative for error 1573 */ 1574 ld r6,_DSISR(r1) 1575 bl hash_page /* build HPTE if possible */ 1576 cmpdi r3,0 /* see if hash_page succeeded */ 1577 1578 /* Success */ 1579 beq fast_exc_return_irq /* Return from exception on success */ 1580 1581 /* Error */ 1582 blt- 13f 1583 1584/* Here we have a page fault that hash_page can't handle. */ 1585handle_page_fault: 158611: ld r4,_DAR(r1) 1587 ld r5,_DSISR(r1) 1588 addi r3,r1,STACK_FRAME_OVERHEAD 1589 bl do_page_fault 1590 cmpdi r3,0 1591 beq+ 12f 1592 bl save_nvgprs 1593 mr r5,r3 1594 addi r3,r1,STACK_FRAME_OVERHEAD 1595 lwz r4,_DAR(r1) 1596 bl bad_page_fault 1597 b ret_from_except 1598 1599/* We have a data breakpoint exception - handle it */ 1600handle_dabr_fault: 1601 bl save_nvgprs 1602 ld r4,_DAR(r1) 1603 ld r5,_DSISR(r1) 1604 addi r3,r1,STACK_FRAME_OVERHEAD 1605 bl do_break 160612: b ret_from_except_lite 1607 1608 1609/* We have a page fault that hash_page could handle but HV refused 1610 * the PTE insertion 1611 */ 161213: bl save_nvgprs 1613 mr r5,r3 1614 addi r3,r1,STACK_FRAME_OVERHEAD 1615 ld r4,_DAR(r1) 1616 bl low_hash_fault 1617 b ret_from_except 1618 1619/* 1620 * We come here as a result of a DSI at a point where we don't want 1621 * to call hash_page, such as when we are accessing memory (possibly 1622 * user memory) inside a PMU interrupt that occurred while interrupts 1623 * were soft-disabled. We want to invoke the exception handler for 1624 * the access, or panic if there isn't a handler. 1625 */ 162677: bl save_nvgprs 1627 mr r4,r3 1628 addi r3,r1,STACK_FRAME_OVERHEAD 1629 li r5,SIGSEGV 1630 bl bad_page_fault 1631 b ret_from_except 1632 1633/* 1634 * Here we have detected that the kernel stack pointer is bad. 1635 * R9 contains the saved CR, r13 points to the paca, 1636 * r10 contains the (bad) kernel stack pointer, 1637 * r11 and r12 contain the saved SRR0 and SRR1. 1638 * We switch to using an emergency stack, save the registers there, 1639 * and call kernel_bad_stack(), which panics. 1640 */ 1641bad_stack: 1642 ld r1,PACAEMERGSP(r13) 1643 subi r1,r1,64+INT_FRAME_SIZE 1644 std r9,_CCR(r1) 1645 std r10,GPR1(r1) 1646 std r11,_NIP(r1) 1647 std r12,_MSR(r1) 1648 mfspr r11,SPRN_DAR 1649 mfspr r12,SPRN_DSISR 1650 std r11,_DAR(r1) 1651 std r12,_DSISR(r1) 1652 mflr r10 1653 mfctr r11 1654 mfxer r12 1655 std r10,_LINK(r1) 1656 std r11,_CTR(r1) 1657 std r12,_XER(r1) 1658 SAVE_GPR(0,r1) 1659 SAVE_GPR(2,r1) 1660 ld r10,EX_R3(r3) 1661 std r10,GPR3(r1) 1662 SAVE_GPR(4,r1) 1663 SAVE_4GPRS(5,r1) 1664 ld r9,EX_R9(r3) 1665 ld r10,EX_R10(r3) 1666 SAVE_2GPRS(9,r1) 1667 ld r9,EX_R11(r3) 1668 ld r10,EX_R12(r3) 1669 ld r11,EX_R13(r3) 1670 std r9,GPR11(r1) 1671 std r10,GPR12(r1) 1672 std r11,GPR13(r1) 1673BEGIN_FTR_SECTION 1674 ld r10,EX_CFAR(r3) 1675 std r10,ORIG_GPR3(r1) 1676END_FTR_SECTION_IFSET(CPU_FTR_CFAR) 1677 SAVE_8GPRS(14,r1) 1678 SAVE_10GPRS(22,r1) 1679 lhz r12,PACA_TRAP_SAVE(r13) 1680 std r12,_TRAP(r1) 1681 addi r11,r1,INT_FRAME_SIZE 1682 std r11,0(r1) 1683 li r12,0 1684 std r12,0(r11) 1685 ld r2,PACATOC(r13) 1686 ld r11,exception_marker@toc(r2) 1687 std r12,RESULT(r1) 1688 std r11,STACK_FRAME_OVERHEAD-16(r1) 16891: addi r3,r1,STACK_FRAME_OVERHEAD 1690 bl kernel_bad_stack 1691 b 1b 1692