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#include <asm/cpuidle.h> 19 20/* 21 * We layout physical memory as follows: 22 * 0x0000 - 0x00ff : Secondary processor spin code 23 * 0x0100 - 0x17ff : pSeries Interrupt prologs 24 * 0x1800 - 0x4000 : interrupt support common interrupt prologs 25 * 0x4000 - 0x5fff : pSeries interrupts with IR=1,DR=1 26 * 0x6000 - 0x6fff : more interrupt support including for IR=1,DR=1 27 * 0x7000 - 0x7fff : FWNMI data area 28 * 0x8000 - 0x8fff : Initial (CPU0) segment table 29 * 0x9000 - : Early init and support code 30 */ 31 /* Syscall routine is used twice, in reloc-off and reloc-on paths */ 32#define SYSCALL_PSERIES_1 \ 33BEGIN_FTR_SECTION \ 34 cmpdi r0,0x1ebe ; \ 35 beq- 1f ; \ 36END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE) \ 37 mr r9,r13 ; \ 38 GET_PACA(r13) ; \ 39 mfspr r11,SPRN_SRR0 ; \ 400: 41 42#define SYSCALL_PSERIES_2_RFID \ 43 mfspr r12,SPRN_SRR1 ; \ 44 ld r10,PACAKBASE(r13) ; \ 45 LOAD_HANDLER(r10, system_call_entry) ; \ 46 mtspr SPRN_SRR0,r10 ; \ 47 ld r10,PACAKMSR(r13) ; \ 48 mtspr SPRN_SRR1,r10 ; \ 49 rfid ; \ 50 b . ; /* prevent speculative execution */ 51 52#define SYSCALL_PSERIES_3 \ 53 /* Fast LE/BE switch system call */ \ 541: mfspr r12,SPRN_SRR1 ; \ 55 xori r12,r12,MSR_LE ; \ 56 mtspr SPRN_SRR1,r12 ; \ 57 rfid ; /* return to userspace */ \ 58 b . ; /* prevent speculative execution */ 59 60#if defined(CONFIG_RELOCATABLE) 61 /* 62 * We can't branch directly; in the direct case we use LR 63 * and system_call_entry restores LR. (We thus need to move 64 * LR to r10 in the RFID case too.) 65 */ 66#define SYSCALL_PSERIES_2_DIRECT \ 67 mflr r10 ; \ 68 ld r12,PACAKBASE(r13) ; \ 69 LOAD_HANDLER(r12, system_call_entry_direct) ; \ 70 mtctr r12 ; \ 71 mfspr r12,SPRN_SRR1 ; \ 72 /* Re-use of r13... No spare regs to do this */ \ 73 li r13,MSR_RI ; \ 74 mtmsrd r13,1 ; \ 75 GET_PACA(r13) ; /* get r13 back */ \ 76 bctr ; 77#else 78 /* We can branch directly */ 79#define SYSCALL_PSERIES_2_DIRECT \ 80 mfspr r12,SPRN_SRR1 ; \ 81 li r10,MSR_RI ; \ 82 mtmsrd r10,1 ; /* Set RI (EE=0) */ \ 83 b system_call_entry_direct ; 84#endif 85 86/* 87 * This is the start of the interrupt handlers for pSeries 88 * This code runs with relocation off. 89 * Code from here to __end_interrupts gets copied down to real 90 * address 0x100 when we are running a relocatable kernel. 91 * Therefore any relative branches in this section must only 92 * branch to labels in this section. 93 */ 94 . = 0x100 95 .globl __start_interrupts 96__start_interrupts: 97 98 .globl system_reset_pSeries; 99system_reset_pSeries: 100 HMT_MEDIUM_PPR_DISCARD 101 SET_SCRATCH0(r13) 102#ifdef CONFIG_PPC_P7_NAP 103BEGIN_FTR_SECTION 104 /* Running native on arch 2.06 or later, check if we are 105 * waking up from nap/sleep/winkle. 106 */ 107 mfspr r13,SPRN_SRR1 108 rlwinm. r13,r13,47-31,30,31 109 beq 9f 110 111 cmpwi cr3,r13,2 112 113 /* 114 * Check if last bit of HSPGR0 is set. This indicates whether we are 115 * waking up from winkle. 116 */ 117 GET_PACA(r13) 118 clrldi r5,r13,63 119 clrrdi r13,r13,1 120 cmpwi cr4,r5,1 121 mtspr SPRN_HSPRG0,r13 122 123 lbz r0,PACA_THREAD_IDLE_STATE(r13) 124 cmpwi cr2,r0,PNV_THREAD_NAP 125 bgt cr2,8f /* Either sleep or Winkle */ 126 127 /* Waking up from nap should not cause hypervisor state loss */ 128 bgt cr3,. 129 130 /* Waking up from nap */ 131 li r0,PNV_THREAD_RUNNING 132 stb r0,PACA_THREAD_IDLE_STATE(r13) /* Clear thread state */ 133 134#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 135 li r0,KVM_HWTHREAD_IN_KERNEL 136 stb r0,HSTATE_HWTHREAD_STATE(r13) 137 /* Order setting hwthread_state vs. testing hwthread_req */ 138 sync 139 lbz r0,HSTATE_HWTHREAD_REQ(r13) 140 cmpwi r0,0 141 beq 1f 142 b kvm_start_guest 1431: 144#endif 145 146 /* Return SRR1 from power7_nap() */ 147 mfspr r3,SPRN_SRR1 148 beq cr3,2f 149 b power7_wakeup_noloss 1502: b power7_wakeup_loss 151 152 /* Fast Sleep wakeup on PowerNV */ 1538: GET_PACA(r13) 154 b power7_wakeup_tb_loss 155 1569: 157END_FTR_SECTION_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_206) 158#endif /* CONFIG_PPC_P7_NAP */ 159 EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common, EXC_STD, 160 NOTEST, 0x100) 161 162 . = 0x200 163machine_check_pSeries_1: 164 /* This is moved out of line as it can be patched by FW, but 165 * some code path might still want to branch into the original 166 * vector 167 */ 168 HMT_MEDIUM_PPR_DISCARD 169 SET_SCRATCH0(r13) /* save r13 */ 170#ifdef CONFIG_PPC_P7_NAP 171BEGIN_FTR_SECTION 172 /* Running native on arch 2.06 or later, check if we are 173 * waking up from nap. We only handle no state loss and 174 * supervisor state loss. We do -not- handle hypervisor 175 * state loss at this time. 176 */ 177 mfspr r13,SPRN_SRR1 178 rlwinm. r13,r13,47-31,30,31 179 OPT_GET_SPR(r13, SPRN_CFAR, CPU_FTR_CFAR) 180 beq 9f 181 182 mfspr r13,SPRN_SRR1 183 rlwinm. r13,r13,47-31,30,31 184 /* waking up from powersave (nap) state */ 185 cmpwi cr1,r13,2 186 /* Total loss of HV state is fatal. let's just stay stuck here */ 187 OPT_GET_SPR(r13, SPRN_CFAR, CPU_FTR_CFAR) 188 bgt cr1,. 1899: 190 OPT_SET_SPR(r13, SPRN_CFAR, CPU_FTR_CFAR) 191END_FTR_SECTION_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_206) 192#endif /* CONFIG_PPC_P7_NAP */ 193 EXCEPTION_PROLOG_0(PACA_EXMC) 194BEGIN_FTR_SECTION 195 b machine_check_pSeries_early 196FTR_SECTION_ELSE 197 b machine_check_pSeries_0 198ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE) 199 200 . = 0x300 201 .globl data_access_pSeries 202data_access_pSeries: 203 HMT_MEDIUM_PPR_DISCARD 204 SET_SCRATCH0(r13) 205 EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, data_access_common, EXC_STD, 206 KVMTEST, 0x300) 207 208 . = 0x380 209 .globl data_access_slb_pSeries 210data_access_slb_pSeries: 211 HMT_MEDIUM_PPR_DISCARD 212 SET_SCRATCH0(r13) 213 EXCEPTION_PROLOG_0(PACA_EXSLB) 214 EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST, 0x380) 215 std r3,PACA_EXSLB+EX_R3(r13) 216 mfspr r3,SPRN_DAR 217#ifdef __DISABLED__ 218 /* Keep that around for when we re-implement dynamic VSIDs */ 219 cmpdi r3,0 220 bge slb_miss_user_pseries 221#endif /* __DISABLED__ */ 222 mfspr r12,SPRN_SRR1 223#ifndef CONFIG_RELOCATABLE 224 b slb_miss_realmode 225#else 226 /* 227 * We can't just use a direct branch to slb_miss_realmode 228 * because the distance from here to there depends on where 229 * the kernel ends up being put. 230 */ 231 mfctr r11 232 ld r10,PACAKBASE(r13) 233 LOAD_HANDLER(r10, slb_miss_realmode) 234 mtctr r10 235 bctr 236#endif 237 238 STD_EXCEPTION_PSERIES(0x400, 0x400, instruction_access) 239 240 . = 0x480 241 .globl instruction_access_slb_pSeries 242instruction_access_slb_pSeries: 243 HMT_MEDIUM_PPR_DISCARD 244 SET_SCRATCH0(r13) 245 EXCEPTION_PROLOG_0(PACA_EXSLB) 246 EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST_PR, 0x480) 247 std r3,PACA_EXSLB+EX_R3(r13) 248 mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */ 249#ifdef __DISABLED__ 250 /* Keep that around for when we re-implement dynamic VSIDs */ 251 cmpdi r3,0 252 bge slb_miss_user_pseries 253#endif /* __DISABLED__ */ 254 mfspr r12,SPRN_SRR1 255#ifndef CONFIG_RELOCATABLE 256 b slb_miss_realmode 257#else 258 mfctr r11 259 ld r10,PACAKBASE(r13) 260 LOAD_HANDLER(r10, slb_miss_realmode) 261 mtctr r10 262 bctr 263#endif 264 265 /* We open code these as we can't have a ". = x" (even with 266 * x = "." within a feature section 267 */ 268 . = 0x500; 269 .globl hardware_interrupt_pSeries; 270 .globl hardware_interrupt_hv; 271hardware_interrupt_pSeries: 272hardware_interrupt_hv: 273 HMT_MEDIUM_PPR_DISCARD 274 BEGIN_FTR_SECTION 275 _MASKABLE_EXCEPTION_PSERIES(0x502, hardware_interrupt, 276 EXC_HV, SOFTEN_TEST_HV) 277 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0x502) 278 FTR_SECTION_ELSE 279 _MASKABLE_EXCEPTION_PSERIES(0x500, hardware_interrupt, 280 EXC_STD, SOFTEN_TEST_HV_201) 281 KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x500) 282 ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_206) 283 284 STD_EXCEPTION_PSERIES(0x600, 0x600, alignment) 285 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x600) 286 287 STD_EXCEPTION_PSERIES(0x700, 0x700, program_check) 288 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x700) 289 290 STD_EXCEPTION_PSERIES(0x800, 0x800, fp_unavailable) 291 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x800) 292 293 . = 0x900 294 .globl decrementer_pSeries 295decrementer_pSeries: 296 _MASKABLE_EXCEPTION_PSERIES(0x900, decrementer, EXC_STD, SOFTEN_TEST_PR) 297 298 STD_EXCEPTION_HV(0x980, 0x982, hdecrementer) 299 300 MASKABLE_EXCEPTION_PSERIES(0xa00, 0xa00, doorbell_super) 301 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xa00) 302 303 STD_EXCEPTION_PSERIES(0xb00, 0xb00, trap_0b) 304 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xb00) 305 306 . = 0xc00 307 .globl system_call_pSeries 308system_call_pSeries: 309 /* 310 * If CONFIG_KVM_BOOK3S_64_HANDLER is set, save the PPR (on systems 311 * that support it) before changing to HMT_MEDIUM. That allows the KVM 312 * code to save that value into the guest state (it is the guest's PPR 313 * value). Otherwise just change to HMT_MEDIUM as userspace has 314 * already saved the PPR. 315 */ 316#ifdef CONFIG_KVM_BOOK3S_64_HANDLER 317 SET_SCRATCH0(r13) 318 GET_PACA(r13) 319 std r9,PACA_EXGEN+EX_R9(r13) 320 OPT_GET_SPR(r9, SPRN_PPR, CPU_FTR_HAS_PPR); 321 HMT_MEDIUM; 322 std r10,PACA_EXGEN+EX_R10(r13) 323 OPT_SAVE_REG_TO_PACA(PACA_EXGEN+EX_PPR, r9, CPU_FTR_HAS_PPR); 324 mfcr r9 325 KVMTEST(0xc00) 326 GET_SCRATCH0(r13) 327#else 328 HMT_MEDIUM; 329#endif 330 SYSCALL_PSERIES_1 331 SYSCALL_PSERIES_2_RFID 332 SYSCALL_PSERIES_3 333 KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xc00) 334 335 STD_EXCEPTION_PSERIES(0xd00, 0xd00, single_step) 336 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xd00) 337 338 /* At 0xe??? we have a bunch of hypervisor exceptions, we branch 339 * out of line to handle them 340 */ 341 . = 0xe00 342hv_data_storage_trampoline: 343 SET_SCRATCH0(r13) 344 EXCEPTION_PROLOG_0(PACA_EXGEN) 345 b h_data_storage_hv 346 347 . = 0xe20 348hv_instr_storage_trampoline: 349 SET_SCRATCH0(r13) 350 EXCEPTION_PROLOG_0(PACA_EXGEN) 351 b h_instr_storage_hv 352 353 . = 0xe40 354emulation_assist_trampoline: 355 SET_SCRATCH0(r13) 356 EXCEPTION_PROLOG_0(PACA_EXGEN) 357 b emulation_assist_hv 358 359 . = 0xe60 360hv_exception_trampoline: 361 SET_SCRATCH0(r13) 362 EXCEPTION_PROLOG_0(PACA_EXGEN) 363 b hmi_exception_early 364 365 . = 0xe80 366hv_doorbell_trampoline: 367 SET_SCRATCH0(r13) 368 EXCEPTION_PROLOG_0(PACA_EXGEN) 369 b h_doorbell_hv 370 371 /* We need to deal with the Altivec unavailable exception 372 * here which is at 0xf20, thus in the middle of the 373 * prolog code of the PerformanceMonitor one. A little 374 * trickery is thus necessary 375 */ 376 . = 0xf00 377performance_monitor_pseries_trampoline: 378 SET_SCRATCH0(r13) 379 EXCEPTION_PROLOG_0(PACA_EXGEN) 380 b performance_monitor_pSeries 381 382 . = 0xf20 383altivec_unavailable_pseries_trampoline: 384 SET_SCRATCH0(r13) 385 EXCEPTION_PROLOG_0(PACA_EXGEN) 386 b altivec_unavailable_pSeries 387 388 . = 0xf40 389vsx_unavailable_pseries_trampoline: 390 SET_SCRATCH0(r13) 391 EXCEPTION_PROLOG_0(PACA_EXGEN) 392 b vsx_unavailable_pSeries 393 394 . = 0xf60 395facility_unavailable_trampoline: 396 SET_SCRATCH0(r13) 397 EXCEPTION_PROLOG_0(PACA_EXGEN) 398 b facility_unavailable_pSeries 399 400 . = 0xf80 401hv_facility_unavailable_trampoline: 402 SET_SCRATCH0(r13) 403 EXCEPTION_PROLOG_0(PACA_EXGEN) 404 b facility_unavailable_hv 405 406#ifdef CONFIG_CBE_RAS 407 STD_EXCEPTION_HV(0x1200, 0x1202, cbe_system_error) 408 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1202) 409#endif /* CONFIG_CBE_RAS */ 410 411 STD_EXCEPTION_PSERIES(0x1300, 0x1300, instruction_breakpoint) 412 KVM_HANDLER_PR_SKIP(PACA_EXGEN, EXC_STD, 0x1300) 413 414 . = 0x1500 415 .global denorm_exception_hv 416denorm_exception_hv: 417 HMT_MEDIUM_PPR_DISCARD 418 mtspr SPRN_SPRG_HSCRATCH0,r13 419 EXCEPTION_PROLOG_0(PACA_EXGEN) 420 EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, 0x1500) 421 422#ifdef CONFIG_PPC_DENORMALISATION 423 mfspr r10,SPRN_HSRR1 424 mfspr r11,SPRN_HSRR0 /* save HSRR0 */ 425 andis. r10,r10,(HSRR1_DENORM)@h /* denorm? */ 426 addi r11,r11,-4 /* HSRR0 is next instruction */ 427 bne+ denorm_assist 428#endif 429 430 KVMTEST(0x1500) 431 EXCEPTION_PROLOG_PSERIES_1(denorm_common, EXC_HV) 432 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x1500) 433 434#ifdef CONFIG_CBE_RAS 435 STD_EXCEPTION_HV(0x1600, 0x1602, cbe_maintenance) 436 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1602) 437#endif /* CONFIG_CBE_RAS */ 438 439 STD_EXCEPTION_PSERIES(0x1700, 0x1700, altivec_assist) 440 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x1700) 441 442#ifdef CONFIG_CBE_RAS 443 STD_EXCEPTION_HV(0x1800, 0x1802, cbe_thermal) 444 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1802) 445#else 446 . = 0x1800 447#endif /* CONFIG_CBE_RAS */ 448 449 450/*** Out of line interrupts support ***/ 451 452 .align 7 453 /* moved from 0x200 */ 454machine_check_pSeries_early: 455BEGIN_FTR_SECTION 456 EXCEPTION_PROLOG_1(PACA_EXMC, NOTEST, 0x200) 457 /* 458 * Register contents: 459 * R13 = PACA 460 * R9 = CR 461 * Original R9 to R13 is saved on PACA_EXMC 462 * 463 * Switch to mc_emergency stack and handle re-entrancy (we limit 464 * the nested MCE upto level 4 to avoid stack overflow). 465 * Save MCE registers srr1, srr0, dar and dsisr and then set ME=1 466 * 467 * We use paca->in_mce to check whether this is the first entry or 468 * nested machine check. We increment paca->in_mce to track nested 469 * machine checks. 470 * 471 * If this is the first entry then set stack pointer to 472 * paca->mc_emergency_sp, otherwise r1 is already pointing to 473 * stack frame on mc_emergency stack. 474 * 475 * NOTE: We are here with MSR_ME=0 (off), which means we risk a 476 * checkstop if we get another machine check exception before we do 477 * rfid with MSR_ME=1. 478 */ 479 mr r11,r1 /* Save r1 */ 480 lhz r10,PACA_IN_MCE(r13) 481 cmpwi r10,0 /* Are we in nested machine check */ 482 bne 0f /* Yes, we are. */ 483 /* First machine check entry */ 484 ld r1,PACAMCEMERGSP(r13) /* Use MC emergency stack */ 4850: subi r1,r1,INT_FRAME_SIZE /* alloc stack frame */ 486 addi r10,r10,1 /* increment paca->in_mce */ 487 sth r10,PACA_IN_MCE(r13) 488 /* Limit nested MCE to level 4 to avoid stack overflow */ 489 cmpwi r10,4 490 bgt 2f /* Check if we hit limit of 4 */ 491 std r11,GPR1(r1) /* Save r1 on the stack. */ 492 std r11,0(r1) /* make stack chain pointer */ 493 mfspr r11,SPRN_SRR0 /* Save SRR0 */ 494 std r11,_NIP(r1) 495 mfspr r11,SPRN_SRR1 /* Save SRR1 */ 496 std r11,_MSR(r1) 497 mfspr r11,SPRN_DAR /* Save DAR */ 498 std r11,_DAR(r1) 499 mfspr r11,SPRN_DSISR /* Save DSISR */ 500 std r11,_DSISR(r1) 501 std r9,_CCR(r1) /* Save CR in stackframe */ 502 /* Save r9 through r13 from EXMC save area to stack frame. */ 503 EXCEPTION_PROLOG_COMMON_2(PACA_EXMC) 504 mfmsr r11 /* get MSR value */ 505 ori r11,r11,MSR_ME /* turn on ME bit */ 506 ori r11,r11,MSR_RI /* turn on RI bit */ 507 ld r12,PACAKBASE(r13) /* get high part of &label */ 508 LOAD_HANDLER(r12, machine_check_handle_early) 5091: mtspr SPRN_SRR0,r12 510 mtspr SPRN_SRR1,r11 511 rfid 512 b . /* prevent speculative execution */ 5132: 514 /* Stack overflow. Stay on emergency stack and panic. 515 * Keep the ME bit off while panic-ing, so that if we hit 516 * another machine check we checkstop. 517 */ 518 addi r1,r1,INT_FRAME_SIZE /* go back to previous stack frame */ 519 ld r11,PACAKMSR(r13) 520 ld r12,PACAKBASE(r13) 521 LOAD_HANDLER(r12, unrecover_mce) 522 li r10,MSR_ME 523 andc r11,r11,r10 /* Turn off MSR_ME */ 524 b 1b 525 b . /* prevent speculative execution */ 526END_FTR_SECTION_IFSET(CPU_FTR_HVMODE) 527 528machine_check_pSeries: 529 .globl machine_check_fwnmi 530machine_check_fwnmi: 531 HMT_MEDIUM_PPR_DISCARD 532 SET_SCRATCH0(r13) /* save r13 */ 533 EXCEPTION_PROLOG_0(PACA_EXMC) 534machine_check_pSeries_0: 535 EXCEPTION_PROLOG_1(PACA_EXMC, KVMTEST, 0x200) 536 EXCEPTION_PROLOG_PSERIES_1(machine_check_common, EXC_STD) 537 KVM_HANDLER_SKIP(PACA_EXMC, EXC_STD, 0x200) 538 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x300) 539 KVM_HANDLER_SKIP(PACA_EXSLB, EXC_STD, 0x380) 540 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x400) 541 KVM_HANDLER_PR(PACA_EXSLB, EXC_STD, 0x480) 542 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x900) 543 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0x982) 544 545#ifdef CONFIG_PPC_DENORMALISATION 546denorm_assist: 547BEGIN_FTR_SECTION 548/* 549 * To denormalise we need to move a copy of the register to itself. 550 * For POWER6 do that here for all FP regs. 551 */ 552 mfmsr r10 553 ori r10,r10,(MSR_FP|MSR_FE0|MSR_FE1) 554 xori r10,r10,(MSR_FE0|MSR_FE1) 555 mtmsrd r10 556 sync 557 558#define FMR2(n) fmr (n), (n) ; fmr n+1, n+1 559#define FMR4(n) FMR2(n) ; FMR2(n+2) 560#define FMR8(n) FMR4(n) ; FMR4(n+4) 561#define FMR16(n) FMR8(n) ; FMR8(n+8) 562#define FMR32(n) FMR16(n) ; FMR16(n+16) 563 FMR32(0) 564 565FTR_SECTION_ELSE 566/* 567 * To denormalise we need to move a copy of the register to itself. 568 * For POWER7 do that here for the first 32 VSX registers only. 569 */ 570 mfmsr r10 571 oris r10,r10,MSR_VSX@h 572 mtmsrd r10 573 sync 574 575#define XVCPSGNDP2(n) XVCPSGNDP(n,n,n) ; XVCPSGNDP(n+1,n+1,n+1) 576#define XVCPSGNDP4(n) XVCPSGNDP2(n) ; XVCPSGNDP2(n+2) 577#define XVCPSGNDP8(n) XVCPSGNDP4(n) ; XVCPSGNDP4(n+4) 578#define XVCPSGNDP16(n) XVCPSGNDP8(n) ; XVCPSGNDP8(n+8) 579#define XVCPSGNDP32(n) XVCPSGNDP16(n) ; XVCPSGNDP16(n+16) 580 XVCPSGNDP32(0) 581 582ALT_FTR_SECTION_END_IFCLR(CPU_FTR_ARCH_206) 583 584BEGIN_FTR_SECTION 585 b denorm_done 586END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) 587/* 588 * To denormalise we need to move a copy of the register to itself. 589 * For POWER8 we need to do that for all 64 VSX registers 590 */ 591 XVCPSGNDP32(32) 592denorm_done: 593 mtspr SPRN_HSRR0,r11 594 mtcrf 0x80,r9 595 ld r9,PACA_EXGEN+EX_R9(r13) 596 RESTORE_PPR_PACA(PACA_EXGEN, r10) 597BEGIN_FTR_SECTION 598 ld r10,PACA_EXGEN+EX_CFAR(r13) 599 mtspr SPRN_CFAR,r10 600END_FTR_SECTION_IFSET(CPU_FTR_CFAR) 601 ld r10,PACA_EXGEN+EX_R10(r13) 602 ld r11,PACA_EXGEN+EX_R11(r13) 603 ld r12,PACA_EXGEN+EX_R12(r13) 604 ld r13,PACA_EXGEN+EX_R13(r13) 605 HRFID 606 b . 607#endif 608 609 .align 7 610 /* moved from 0xe00 */ 611 STD_EXCEPTION_HV_OOL(0xe02, h_data_storage) 612 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0xe02) 613 STD_EXCEPTION_HV_OOL(0xe22, h_instr_storage) 614 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe22) 615 STD_EXCEPTION_HV_OOL(0xe42, emulation_assist) 616 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe42) 617 MASKABLE_EXCEPTION_HV_OOL(0xe62, hmi_exception) 618 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe62) 619 620 MASKABLE_EXCEPTION_HV_OOL(0xe82, h_doorbell) 621 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe82) 622 623 /* moved from 0xf00 */ 624 STD_EXCEPTION_PSERIES_OOL(0xf00, performance_monitor) 625 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf00) 626 STD_EXCEPTION_PSERIES_OOL(0xf20, altivec_unavailable) 627 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf20) 628 STD_EXCEPTION_PSERIES_OOL(0xf40, vsx_unavailable) 629 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf40) 630 STD_EXCEPTION_PSERIES_OOL(0xf60, facility_unavailable) 631 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf60) 632 STD_EXCEPTION_HV_OOL(0xf82, facility_unavailable) 633 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xf82) 634 635/* 636 * An interrupt came in while soft-disabled. We set paca->irq_happened, then: 637 * - If it was a decrementer interrupt, we bump the dec to max and and return. 638 * - If it was a doorbell we return immediately since doorbells are edge 639 * triggered and won't automatically refire. 640 * - If it was a HMI we return immediately since we handled it in realmode 641 * and it won't refire. 642 * - else we hard disable and return. 643 * This is called with r10 containing the value to OR to the paca field. 644 */ 645#define MASKED_INTERRUPT(_H) \ 646masked_##_H##interrupt: \ 647 std r11,PACA_EXGEN+EX_R11(r13); \ 648 lbz r11,PACAIRQHAPPENED(r13); \ 649 or r11,r11,r10; \ 650 stb r11,PACAIRQHAPPENED(r13); \ 651 cmpwi r10,PACA_IRQ_DEC; \ 652 bne 1f; \ 653 lis r10,0x7fff; \ 654 ori r10,r10,0xffff; \ 655 mtspr SPRN_DEC,r10; \ 656 b 2f; \ 6571: cmpwi r10,PACA_IRQ_DBELL; \ 658 beq 2f; \ 659 cmpwi r10,PACA_IRQ_HMI; \ 660 beq 2f; \ 661 mfspr r10,SPRN_##_H##SRR1; \ 662 rldicl r10,r10,48,1; /* clear MSR_EE */ \ 663 rotldi r10,r10,16; \ 664 mtspr SPRN_##_H##SRR1,r10; \ 6652: mtcrf 0x80,r9; \ 666 ld r9,PACA_EXGEN+EX_R9(r13); \ 667 ld r10,PACA_EXGEN+EX_R10(r13); \ 668 ld r11,PACA_EXGEN+EX_R11(r13); \ 669 GET_SCRATCH0(r13); \ 670 ##_H##rfid; \ 671 b . 672 673 MASKED_INTERRUPT() 674 MASKED_INTERRUPT(H) 675 676/* 677 * Called from arch_local_irq_enable when an interrupt needs 678 * to be resent. r3 contains 0x500, 0x900, 0xa00 or 0xe80 to indicate 679 * which kind of interrupt. MSR:EE is already off. We generate a 680 * stackframe like if a real interrupt had happened. 681 * 682 * Note: While MSR:EE is off, we need to make sure that _MSR 683 * in the generated frame has EE set to 1 or the exception 684 * handler will not properly re-enable them. 685 */ 686_GLOBAL(__replay_interrupt) 687 /* We are going to jump to the exception common code which 688 * will retrieve various register values from the PACA which 689 * we don't give a damn about, so we don't bother storing them. 690 */ 691 mfmsr r12 692 mflr r11 693 mfcr r9 694 ori r12,r12,MSR_EE 695 cmpwi r3,0x900 696 beq decrementer_common 697 cmpwi r3,0x500 698 beq hardware_interrupt_common 699BEGIN_FTR_SECTION 700 cmpwi r3,0xe80 701 beq h_doorbell_common 702FTR_SECTION_ELSE 703 cmpwi r3,0xa00 704 beq doorbell_super_common 705ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE) 706 blr 707 708#ifdef CONFIG_PPC_PSERIES 709/* 710 * Vectors for the FWNMI option. Share common code. 711 */ 712 .globl system_reset_fwnmi 713 .align 7 714system_reset_fwnmi: 715 HMT_MEDIUM_PPR_DISCARD 716 SET_SCRATCH0(r13) /* save r13 */ 717 EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common, EXC_STD, 718 NOTEST, 0x100) 719 720#endif /* CONFIG_PPC_PSERIES */ 721 722#ifdef __DISABLED__ 723/* 724 * This is used for when the SLB miss handler has to go virtual, 725 * which doesn't happen for now anymore but will once we re-implement 726 * dynamic VSIDs for shared page tables 727 */ 728slb_miss_user_pseries: 729 std r10,PACA_EXGEN+EX_R10(r13) 730 std r11,PACA_EXGEN+EX_R11(r13) 731 std r12,PACA_EXGEN+EX_R12(r13) 732 GET_SCRATCH0(r10) 733 ld r11,PACA_EXSLB+EX_R9(r13) 734 ld r12,PACA_EXSLB+EX_R3(r13) 735 std r10,PACA_EXGEN+EX_R13(r13) 736 std r11,PACA_EXGEN+EX_R9(r13) 737 std r12,PACA_EXGEN+EX_R3(r13) 738 clrrdi r12,r13,32 739 mfmsr r10 740 mfspr r11,SRR0 /* save SRR0 */ 741 ori r12,r12,slb_miss_user_common@l /* virt addr of handler */ 742 ori r10,r10,MSR_IR|MSR_DR|MSR_RI 743 mtspr SRR0,r12 744 mfspr r12,SRR1 /* and SRR1 */ 745 mtspr SRR1,r10 746 rfid 747 b . /* prevent spec. execution */ 748#endif /* __DISABLED__ */ 749 750#ifdef CONFIG_KVM_BOOK3S_64_HANDLER 751kvmppc_skip_interrupt: 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_SRR0 757 addi r13, r13, 4 758 mtspr SPRN_SRR0, r13 759 GET_SCRATCH0(r13) 760 rfid 761 b . 762 763kvmppc_skip_Hinterrupt: 764 /* 765 * Here all GPRs are unchanged from when the interrupt happened 766 * except for r13, which is saved in SPRG_SCRATCH0. 767 */ 768 mfspr r13, SPRN_HSRR0 769 addi r13, r13, 4 770 mtspr SPRN_HSRR0, r13 771 GET_SCRATCH0(r13) 772 hrfid 773 b . 774#endif 775 776/* 777 * Code from here down to __end_handlers is invoked from the 778 * exception prologs above. Because the prologs assemble the 779 * addresses of these handlers using the LOAD_HANDLER macro, 780 * which uses an ori instruction, these handlers must be in 781 * the first 64k of the kernel image. 782 */ 783 784/*** Common interrupt handlers ***/ 785 786 STD_EXCEPTION_COMMON(0x100, system_reset, system_reset_exception) 787 788 STD_EXCEPTION_COMMON_ASYNC(0x500, hardware_interrupt, do_IRQ) 789 STD_EXCEPTION_COMMON_ASYNC(0x900, decrementer, timer_interrupt) 790 STD_EXCEPTION_COMMON(0x980, hdecrementer, hdec_interrupt) 791#ifdef CONFIG_PPC_DOORBELL 792 STD_EXCEPTION_COMMON_ASYNC(0xa00, doorbell_super, doorbell_exception) 793#else 794 STD_EXCEPTION_COMMON_ASYNC(0xa00, doorbell_super, unknown_exception) 795#endif 796 STD_EXCEPTION_COMMON(0xb00, trap_0b, unknown_exception) 797 STD_EXCEPTION_COMMON(0xd00, single_step, single_step_exception) 798 STD_EXCEPTION_COMMON(0xe00, trap_0e, unknown_exception) 799 STD_EXCEPTION_COMMON(0xe40, emulation_assist, emulation_assist_interrupt) 800 STD_EXCEPTION_COMMON_ASYNC(0xe60, hmi_exception, handle_hmi_exception) 801#ifdef CONFIG_PPC_DOORBELL 802 STD_EXCEPTION_COMMON_ASYNC(0xe80, h_doorbell, doorbell_exception) 803#else 804 STD_EXCEPTION_COMMON_ASYNC(0xe80, h_doorbell, unknown_exception) 805#endif 806 STD_EXCEPTION_COMMON_ASYNC(0xf00, performance_monitor, performance_monitor_exception) 807 STD_EXCEPTION_COMMON(0x1300, instruction_breakpoint, instruction_breakpoint_exception) 808 STD_EXCEPTION_COMMON(0x1502, denorm, unknown_exception) 809#ifdef CONFIG_ALTIVEC 810 STD_EXCEPTION_COMMON(0x1700, altivec_assist, altivec_assist_exception) 811#else 812 STD_EXCEPTION_COMMON(0x1700, altivec_assist, unknown_exception) 813#endif 814#ifdef CONFIG_CBE_RAS 815 STD_EXCEPTION_COMMON(0x1200, cbe_system_error, cbe_system_error_exception) 816 STD_EXCEPTION_COMMON(0x1600, cbe_maintenance, cbe_maintenance_exception) 817 STD_EXCEPTION_COMMON(0x1800, cbe_thermal, cbe_thermal_exception) 818#endif /* CONFIG_CBE_RAS */ 819 820 /* 821 * Relocation-on interrupts: A subset of the interrupts can be delivered 822 * with IR=1/DR=1, if AIL==2 and MSR.HV won't be changed by delivering 823 * it. Addresses are the same as the original interrupt addresses, but 824 * offset by 0xc000000000004000. 825 * It's impossible to receive interrupts below 0x300 via this mechanism. 826 * KVM: None of these traps are from the guest ; anything that escalated 827 * to HV=1 from HV=0 is delivered via real mode handlers. 828 */ 829 830 /* 831 * This uses the standard macro, since the original 0x300 vector 832 * only has extra guff for STAB-based processors -- which never 833 * come here. 834 */ 835 STD_RELON_EXCEPTION_PSERIES(0x4300, 0x300, data_access) 836 . = 0x4380 837 .globl data_access_slb_relon_pSeries 838data_access_slb_relon_pSeries: 839 SET_SCRATCH0(r13) 840 EXCEPTION_PROLOG_0(PACA_EXSLB) 841 EXCEPTION_PROLOG_1(PACA_EXSLB, NOTEST, 0x380) 842 std r3,PACA_EXSLB+EX_R3(r13) 843 mfspr r3,SPRN_DAR 844 mfspr r12,SPRN_SRR1 845#ifndef CONFIG_RELOCATABLE 846 b slb_miss_realmode 847#else 848 /* 849 * We can't just use a direct branch to slb_miss_realmode 850 * because the distance from here to there depends on where 851 * the kernel ends up being put. 852 */ 853 mfctr r11 854 ld r10,PACAKBASE(r13) 855 LOAD_HANDLER(r10, slb_miss_realmode) 856 mtctr r10 857 bctr 858#endif 859 860 STD_RELON_EXCEPTION_PSERIES(0x4400, 0x400, instruction_access) 861 . = 0x4480 862 .globl instruction_access_slb_relon_pSeries 863instruction_access_slb_relon_pSeries: 864 SET_SCRATCH0(r13) 865 EXCEPTION_PROLOG_0(PACA_EXSLB) 866 EXCEPTION_PROLOG_1(PACA_EXSLB, NOTEST, 0x480) 867 std r3,PACA_EXSLB+EX_R3(r13) 868 mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */ 869 mfspr r12,SPRN_SRR1 870#ifndef CONFIG_RELOCATABLE 871 b slb_miss_realmode 872#else 873 mfctr r11 874 ld r10,PACAKBASE(r13) 875 LOAD_HANDLER(r10, slb_miss_realmode) 876 mtctr r10 877 bctr 878#endif 879 880 . = 0x4500 881 .globl hardware_interrupt_relon_pSeries; 882 .globl hardware_interrupt_relon_hv; 883hardware_interrupt_relon_pSeries: 884hardware_interrupt_relon_hv: 885 BEGIN_FTR_SECTION 886 _MASKABLE_RELON_EXCEPTION_PSERIES(0x502, hardware_interrupt, EXC_HV, SOFTEN_TEST_HV) 887 FTR_SECTION_ELSE 888 _MASKABLE_RELON_EXCEPTION_PSERIES(0x500, hardware_interrupt, EXC_STD, SOFTEN_TEST_PR) 889 ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE) 890 STD_RELON_EXCEPTION_PSERIES(0x4600, 0x600, alignment) 891 STD_RELON_EXCEPTION_PSERIES(0x4700, 0x700, program_check) 892 STD_RELON_EXCEPTION_PSERIES(0x4800, 0x800, fp_unavailable) 893 MASKABLE_RELON_EXCEPTION_PSERIES(0x4900, 0x900, decrementer) 894 STD_RELON_EXCEPTION_HV(0x4980, 0x982, hdecrementer) 895 MASKABLE_RELON_EXCEPTION_PSERIES(0x4a00, 0xa00, doorbell_super) 896 STD_RELON_EXCEPTION_PSERIES(0x4b00, 0xb00, trap_0b) 897 898 . = 0x4c00 899 .globl system_call_relon_pSeries 900system_call_relon_pSeries: 901 HMT_MEDIUM 902 SYSCALL_PSERIES_1 903 SYSCALL_PSERIES_2_DIRECT 904 SYSCALL_PSERIES_3 905 906 STD_RELON_EXCEPTION_PSERIES(0x4d00, 0xd00, single_step) 907 908 . = 0x4e00 909 b . /* Can't happen, see v2.07 Book III-S section 6.5 */ 910 911 . = 0x4e20 912 b . /* Can't happen, see v2.07 Book III-S section 6.5 */ 913 914 . = 0x4e40 915emulation_assist_relon_trampoline: 916 SET_SCRATCH0(r13) 917 EXCEPTION_PROLOG_0(PACA_EXGEN) 918 b emulation_assist_relon_hv 919 920 . = 0x4e60 921 b . /* Can't happen, see v2.07 Book III-S section 6.5 */ 922 923 . = 0x4e80 924h_doorbell_relon_trampoline: 925 SET_SCRATCH0(r13) 926 EXCEPTION_PROLOG_0(PACA_EXGEN) 927 b h_doorbell_relon_hv 928 929 . = 0x4f00 930performance_monitor_relon_pseries_trampoline: 931 SET_SCRATCH0(r13) 932 EXCEPTION_PROLOG_0(PACA_EXGEN) 933 b performance_monitor_relon_pSeries 934 935 . = 0x4f20 936altivec_unavailable_relon_pseries_trampoline: 937 SET_SCRATCH0(r13) 938 EXCEPTION_PROLOG_0(PACA_EXGEN) 939 b altivec_unavailable_relon_pSeries 940 941 . = 0x4f40 942vsx_unavailable_relon_pseries_trampoline: 943 SET_SCRATCH0(r13) 944 EXCEPTION_PROLOG_0(PACA_EXGEN) 945 b vsx_unavailable_relon_pSeries 946 947 . = 0x4f60 948facility_unavailable_relon_trampoline: 949 SET_SCRATCH0(r13) 950 EXCEPTION_PROLOG_0(PACA_EXGEN) 951 b facility_unavailable_relon_pSeries 952 953 . = 0x4f80 954hv_facility_unavailable_relon_trampoline: 955 SET_SCRATCH0(r13) 956 EXCEPTION_PROLOG_0(PACA_EXGEN) 957 b hv_facility_unavailable_relon_hv 958 959 STD_RELON_EXCEPTION_PSERIES(0x5300, 0x1300, instruction_breakpoint) 960#ifdef CONFIG_PPC_DENORMALISATION 961 . = 0x5500 962 b denorm_exception_hv 963#endif 964 STD_RELON_EXCEPTION_PSERIES(0x5700, 0x1700, altivec_assist) 965 966 /* Other future vectors */ 967 .align 7 968 .globl __end_interrupts 969__end_interrupts: 970 971 .align 7 972system_call_entry_direct: 973#if defined(CONFIG_RELOCATABLE) 974 /* The first level prologue may have used LR to get here, saving 975 * orig in r10. To save hacking/ifdeffing common code, restore here. 976 */ 977 mtlr r10 978#endif 979system_call_entry: 980 b system_call_common 981 982ppc64_runlatch_on_trampoline: 983 b __ppc64_runlatch_on 984 985/* 986 * Here r13 points to the paca, r9 contains the saved CR, 987 * SRR0 and SRR1 are saved in r11 and r12, 988 * r9 - r13 are saved in paca->exgen. 989 */ 990 .align 7 991 .globl data_access_common 992data_access_common: 993 mfspr r10,SPRN_DAR 994 std r10,PACA_EXGEN+EX_DAR(r13) 995 mfspr r10,SPRN_DSISR 996 stw r10,PACA_EXGEN+EX_DSISR(r13) 997 EXCEPTION_PROLOG_COMMON(0x300, PACA_EXGEN) 998 RECONCILE_IRQ_STATE(r10, r11) 999 ld r12,_MSR(r1) 1000 ld r3,PACA_EXGEN+EX_DAR(r13) 1001 lwz r4,PACA_EXGEN+EX_DSISR(r13) 1002 li r5,0x300 1003 b do_hash_page /* Try to handle as hpte fault */ 1004 1005 .align 7 1006 .globl h_data_storage_common 1007h_data_storage_common: 1008 mfspr r10,SPRN_HDAR 1009 std r10,PACA_EXGEN+EX_DAR(r13) 1010 mfspr r10,SPRN_HDSISR 1011 stw r10,PACA_EXGEN+EX_DSISR(r13) 1012 EXCEPTION_PROLOG_COMMON(0xe00, PACA_EXGEN) 1013 bl save_nvgprs 1014 RECONCILE_IRQ_STATE(r10, r11) 1015 addi r3,r1,STACK_FRAME_OVERHEAD 1016 bl unknown_exception 1017 b ret_from_except 1018 1019 .align 7 1020 .globl instruction_access_common 1021instruction_access_common: 1022 EXCEPTION_PROLOG_COMMON(0x400, PACA_EXGEN) 1023 RECONCILE_IRQ_STATE(r10, r11) 1024 ld r12,_MSR(r1) 1025 ld r3,_NIP(r1) 1026 andis. r4,r12,0x5820 1027 li r5,0x400 1028 b do_hash_page /* Try to handle as hpte fault */ 1029 1030 STD_EXCEPTION_COMMON(0xe20, h_instr_storage, unknown_exception) 1031 1032/* 1033 * Here is the common SLB miss user that is used when going to virtual 1034 * mode for SLB misses, that is currently not used 1035 */ 1036#ifdef __DISABLED__ 1037 .align 7 1038 .globl slb_miss_user_common 1039slb_miss_user_common: 1040 mflr r10 1041 std r3,PACA_EXGEN+EX_DAR(r13) 1042 stw r9,PACA_EXGEN+EX_CCR(r13) 1043 std r10,PACA_EXGEN+EX_LR(r13) 1044 std r11,PACA_EXGEN+EX_SRR0(r13) 1045 bl slb_allocate_user 1046 1047 ld r10,PACA_EXGEN+EX_LR(r13) 1048 ld r3,PACA_EXGEN+EX_R3(r13) 1049 lwz r9,PACA_EXGEN+EX_CCR(r13) 1050 ld r11,PACA_EXGEN+EX_SRR0(r13) 1051 mtlr r10 1052 beq- slb_miss_fault 1053 1054 andi. r10,r12,MSR_RI /* check for unrecoverable exception */ 1055 beq- unrecov_user_slb 1056 mfmsr r10 1057 1058.machine push 1059.machine "power4" 1060 mtcrf 0x80,r9 1061.machine pop 1062 1063 clrrdi r10,r10,2 /* clear RI before setting SRR0/1 */ 1064 mtmsrd r10,1 1065 1066 mtspr SRR0,r11 1067 mtspr SRR1,r12 1068 1069 ld r9,PACA_EXGEN+EX_R9(r13) 1070 ld r10,PACA_EXGEN+EX_R10(r13) 1071 ld r11,PACA_EXGEN+EX_R11(r13) 1072 ld r12,PACA_EXGEN+EX_R12(r13) 1073 ld r13,PACA_EXGEN+EX_R13(r13) 1074 rfid 1075 b . 1076 1077slb_miss_fault: 1078 EXCEPTION_PROLOG_COMMON(0x380, PACA_EXGEN) 1079 ld r4,PACA_EXGEN+EX_DAR(r13) 1080 li r5,0 1081 std r4,_DAR(r1) 1082 std r5,_DSISR(r1) 1083 b handle_page_fault 1084 1085unrecov_user_slb: 1086 EXCEPTION_PROLOG_COMMON(0x4200, PACA_EXGEN) 1087 RECONCILE_IRQ_STATE(r10, r11) 1088 bl save_nvgprs 10891: addi r3,r1,STACK_FRAME_OVERHEAD 1090 bl unrecoverable_exception 1091 b 1b 1092 1093#endif /* __DISABLED__ */ 1094 1095 1096 /* 1097 * Machine check is different because we use a different 1098 * save area: PACA_EXMC instead of PACA_EXGEN. 1099 */ 1100 .align 7 1101 .globl machine_check_common 1102machine_check_common: 1103 1104 mfspr r10,SPRN_DAR 1105 std r10,PACA_EXGEN+EX_DAR(r13) 1106 mfspr r10,SPRN_DSISR 1107 stw r10,PACA_EXGEN+EX_DSISR(r13) 1108 EXCEPTION_PROLOG_COMMON(0x200, PACA_EXMC) 1109 FINISH_NAP 1110 RECONCILE_IRQ_STATE(r10, r11) 1111 ld r3,PACA_EXGEN+EX_DAR(r13) 1112 lwz r4,PACA_EXGEN+EX_DSISR(r13) 1113 std r3,_DAR(r1) 1114 std r4,_DSISR(r1) 1115 bl save_nvgprs 1116 addi r3,r1,STACK_FRAME_OVERHEAD 1117 bl machine_check_exception 1118 b ret_from_except 1119 1120 .align 7 1121 .globl alignment_common 1122alignment_common: 1123 mfspr r10,SPRN_DAR 1124 std r10,PACA_EXGEN+EX_DAR(r13) 1125 mfspr r10,SPRN_DSISR 1126 stw r10,PACA_EXGEN+EX_DSISR(r13) 1127 EXCEPTION_PROLOG_COMMON(0x600, PACA_EXGEN) 1128 ld r3,PACA_EXGEN+EX_DAR(r13) 1129 lwz r4,PACA_EXGEN+EX_DSISR(r13) 1130 std r3,_DAR(r1) 1131 std r4,_DSISR(r1) 1132 bl save_nvgprs 1133 RECONCILE_IRQ_STATE(r10, r11) 1134 addi r3,r1,STACK_FRAME_OVERHEAD 1135 bl alignment_exception 1136 b ret_from_except 1137 1138 .align 7 1139 .globl program_check_common 1140program_check_common: 1141 EXCEPTION_PROLOG_COMMON(0x700, PACA_EXGEN) 1142 bl save_nvgprs 1143 RECONCILE_IRQ_STATE(r10, r11) 1144 addi r3,r1,STACK_FRAME_OVERHEAD 1145 bl program_check_exception 1146 b ret_from_except 1147 1148 .align 7 1149 .globl fp_unavailable_common 1150fp_unavailable_common: 1151 EXCEPTION_PROLOG_COMMON(0x800, PACA_EXGEN) 1152 bne 1f /* if from user, just load it up */ 1153 bl save_nvgprs 1154 RECONCILE_IRQ_STATE(r10, r11) 1155 addi r3,r1,STACK_FRAME_OVERHEAD 1156 bl kernel_fp_unavailable_exception 1157 BUG_OPCODE 11581: 1159#ifdef CONFIG_PPC_TRANSACTIONAL_MEM 1160BEGIN_FTR_SECTION 1161 /* Test if 2 TM state bits are zero. If non-zero (ie. userspace was in 1162 * transaction), go do TM stuff 1163 */ 1164 rldicl. r0, r12, (64-MSR_TS_LG), (64-2) 1165 bne- 2f 1166END_FTR_SECTION_IFSET(CPU_FTR_TM) 1167#endif 1168 bl load_up_fpu 1169 b fast_exception_return 1170#ifdef CONFIG_PPC_TRANSACTIONAL_MEM 11712: /* User process was in a transaction */ 1172 bl save_nvgprs 1173 RECONCILE_IRQ_STATE(r10, r11) 1174 addi r3,r1,STACK_FRAME_OVERHEAD 1175 bl fp_unavailable_tm 1176 b ret_from_except 1177#endif 1178 .align 7 1179 .globl altivec_unavailable_common 1180altivec_unavailable_common: 1181 EXCEPTION_PROLOG_COMMON(0xf20, PACA_EXGEN) 1182#ifdef CONFIG_ALTIVEC 1183BEGIN_FTR_SECTION 1184 beq 1f 1185#ifdef CONFIG_PPC_TRANSACTIONAL_MEM 1186 BEGIN_FTR_SECTION_NESTED(69) 1187 /* Test if 2 TM state bits are zero. If non-zero (ie. userspace was in 1188 * transaction), go do TM stuff 1189 */ 1190 rldicl. r0, r12, (64-MSR_TS_LG), (64-2) 1191 bne- 2f 1192 END_FTR_SECTION_NESTED(CPU_FTR_TM, CPU_FTR_TM, 69) 1193#endif 1194 bl load_up_altivec 1195 b fast_exception_return 1196#ifdef CONFIG_PPC_TRANSACTIONAL_MEM 11972: /* User process was in a transaction */ 1198 bl save_nvgprs 1199 RECONCILE_IRQ_STATE(r10, r11) 1200 addi r3,r1,STACK_FRAME_OVERHEAD 1201 bl altivec_unavailable_tm 1202 b ret_from_except 1203#endif 12041: 1205END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) 1206#endif 1207 bl save_nvgprs 1208 RECONCILE_IRQ_STATE(r10, r11) 1209 addi r3,r1,STACK_FRAME_OVERHEAD 1210 bl altivec_unavailable_exception 1211 b ret_from_except 1212 1213 .align 7 1214 .globl vsx_unavailable_common 1215vsx_unavailable_common: 1216 EXCEPTION_PROLOG_COMMON(0xf40, PACA_EXGEN) 1217#ifdef CONFIG_VSX 1218BEGIN_FTR_SECTION 1219 beq 1f 1220#ifdef CONFIG_PPC_TRANSACTIONAL_MEM 1221 BEGIN_FTR_SECTION_NESTED(69) 1222 /* Test if 2 TM state bits are zero. If non-zero (ie. userspace was in 1223 * transaction), go do TM stuff 1224 */ 1225 rldicl. r0, r12, (64-MSR_TS_LG), (64-2) 1226 bne- 2f 1227 END_FTR_SECTION_NESTED(CPU_FTR_TM, CPU_FTR_TM, 69) 1228#endif 1229 b load_up_vsx 1230#ifdef CONFIG_PPC_TRANSACTIONAL_MEM 12312: /* User process was in a transaction */ 1232 bl save_nvgprs 1233 RECONCILE_IRQ_STATE(r10, r11) 1234 addi r3,r1,STACK_FRAME_OVERHEAD 1235 bl vsx_unavailable_tm 1236 b ret_from_except 1237#endif 12381: 1239END_FTR_SECTION_IFSET(CPU_FTR_VSX) 1240#endif 1241 bl save_nvgprs 1242 RECONCILE_IRQ_STATE(r10, r11) 1243 addi r3,r1,STACK_FRAME_OVERHEAD 1244 bl vsx_unavailable_exception 1245 b ret_from_except 1246 1247 STD_EXCEPTION_COMMON(0xf60, facility_unavailable, facility_unavailable_exception) 1248 STD_EXCEPTION_COMMON(0xf80, hv_facility_unavailable, facility_unavailable_exception) 1249 1250 .align 7 1251 .globl __end_handlers 1252__end_handlers: 1253 1254 /* Equivalents to the above handlers for relocation-on interrupt vectors */ 1255 STD_RELON_EXCEPTION_HV_OOL(0xe40, emulation_assist) 1256 MASKABLE_RELON_EXCEPTION_HV_OOL(0xe80, h_doorbell) 1257 1258 STD_RELON_EXCEPTION_PSERIES_OOL(0xf00, performance_monitor) 1259 STD_RELON_EXCEPTION_PSERIES_OOL(0xf20, altivec_unavailable) 1260 STD_RELON_EXCEPTION_PSERIES_OOL(0xf40, vsx_unavailable) 1261 STD_RELON_EXCEPTION_PSERIES_OOL(0xf60, facility_unavailable) 1262 STD_RELON_EXCEPTION_HV_OOL(0xf80, hv_facility_unavailable) 1263 1264#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) 1265/* 1266 * Data area reserved for FWNMI option. 1267 * This address (0x7000) is fixed by the RPA. 1268 */ 1269 .= 0x7000 1270 .globl fwnmi_data_area 1271fwnmi_data_area: 1272 1273 /* pseries and powernv need to keep the whole page from 1274 * 0x7000 to 0x8000 free for use by the firmware 1275 */ 1276 . = 0x8000 1277#endif /* defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) */ 1278 1279 .globl hmi_exception_early 1280hmi_exception_early: 1281 EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, 0xe60) 1282 mr r10,r1 /* Save r1 */ 1283 ld r1,PACAEMERGSP(r13) /* Use emergency stack */ 1284 subi r1,r1,INT_FRAME_SIZE /* alloc stack frame */ 1285 std r9,_CCR(r1) /* save CR in stackframe */ 1286 mfspr r11,SPRN_HSRR0 /* Save HSRR0 */ 1287 std r11,_NIP(r1) /* save HSRR0 in stackframe */ 1288 mfspr r12,SPRN_HSRR1 /* Save SRR1 */ 1289 std r12,_MSR(r1) /* save SRR1 in stackframe */ 1290 std r10,0(r1) /* make stack chain pointer */ 1291 std r0,GPR0(r1) /* save r0 in stackframe */ 1292 std r10,GPR1(r1) /* save r1 in stackframe */ 1293 EXCEPTION_PROLOG_COMMON_2(PACA_EXGEN) 1294 EXCEPTION_PROLOG_COMMON_3(0xe60) 1295 addi r3,r1,STACK_FRAME_OVERHEAD 1296 bl hmi_exception_realmode 1297 /* Windup the stack. */ 1298 /* Move original HSRR0 and HSRR1 into the respective regs */ 1299 ld r9,_MSR(r1) 1300 mtspr SPRN_HSRR1,r9 1301 ld r3,_NIP(r1) 1302 mtspr SPRN_HSRR0,r3 1303 ld r9,_CTR(r1) 1304 mtctr r9 1305 ld r9,_XER(r1) 1306 mtxer r9 1307 ld r9,_LINK(r1) 1308 mtlr r9 1309 REST_GPR(0, r1) 1310 REST_8GPRS(2, r1) 1311 REST_GPR(10, r1) 1312 ld r11,_CCR(r1) 1313 mtcr r11 1314 REST_GPR(11, r1) 1315 REST_2GPRS(12, r1) 1316 /* restore original r1. */ 1317 ld r1,GPR1(r1) 1318 1319 /* 1320 * Go to virtual mode and pull the HMI event information from 1321 * firmware. 1322 */ 1323 .globl hmi_exception_after_realmode 1324hmi_exception_after_realmode: 1325 SET_SCRATCH0(r13) 1326 EXCEPTION_PROLOG_0(PACA_EXGEN) 1327 b hmi_exception_hv 1328 1329 1330#define MACHINE_CHECK_HANDLER_WINDUP \ 1331 /* Clear MSR_RI before setting SRR0 and SRR1. */\ 1332 li r0,MSR_RI; \ 1333 mfmsr r9; /* get MSR value */ \ 1334 andc r9,r9,r0; \ 1335 mtmsrd r9,1; /* Clear MSR_RI */ \ 1336 /* Move original SRR0 and SRR1 into the respective regs */ \ 1337 ld r9,_MSR(r1); \ 1338 mtspr SPRN_SRR1,r9; \ 1339 ld r3,_NIP(r1); \ 1340 mtspr SPRN_SRR0,r3; \ 1341 ld r9,_CTR(r1); \ 1342 mtctr r9; \ 1343 ld r9,_XER(r1); \ 1344 mtxer r9; \ 1345 ld r9,_LINK(r1); \ 1346 mtlr r9; \ 1347 REST_GPR(0, r1); \ 1348 REST_8GPRS(2, r1); \ 1349 REST_GPR(10, r1); \ 1350 ld r11,_CCR(r1); \ 1351 mtcr r11; \ 1352 /* Decrement paca->in_mce. */ \ 1353 lhz r12,PACA_IN_MCE(r13); \ 1354 subi r12,r12,1; \ 1355 sth r12,PACA_IN_MCE(r13); \ 1356 REST_GPR(11, r1); \ 1357 REST_2GPRS(12, r1); \ 1358 /* restore original r1. */ \ 1359 ld r1,GPR1(r1) 1360 1361 /* 1362 * Handle machine check early in real mode. We come here with 1363 * ME=1, MMU (IR=0 and DR=0) off and using MC emergency stack. 1364 */ 1365 .align 7 1366 .globl machine_check_handle_early 1367machine_check_handle_early: 1368 std r0,GPR0(r1) /* Save r0 */ 1369 EXCEPTION_PROLOG_COMMON_3(0x200) 1370 bl save_nvgprs 1371 addi r3,r1,STACK_FRAME_OVERHEAD 1372 bl machine_check_early 1373 std r3,RESULT(r1) /* Save result */ 1374 ld r12,_MSR(r1) 1375#ifdef CONFIG_PPC_P7_NAP 1376 /* 1377 * Check if thread was in power saving mode. We come here when any 1378 * of the following is true: 1379 * a. thread wasn't in power saving mode 1380 * b. thread was in power saving mode with no state loss or 1381 * supervisor state loss 1382 * 1383 * Go back to nap again if (b) is true. 1384 */ 1385 rlwinm. r11,r12,47-31,30,31 /* Was it in power saving mode? */ 1386 beq 4f /* No, it wasn;t */ 1387 /* Thread was in power saving mode. Go back to nap again. */ 1388 cmpwi r11,2 1389 bne 3f 1390 /* Supervisor state loss */ 1391 li r0,1 1392 stb r0,PACA_NAPSTATELOST(r13) 13933: bl machine_check_queue_event 1394 MACHINE_CHECK_HANDLER_WINDUP 1395 GET_PACA(r13) 1396 ld r1,PACAR1(r13) 1397 li r3,PNV_THREAD_NAP 1398 b power7_enter_nap_mode 13994: 1400#endif 1401 /* 1402 * Check if we are coming from hypervisor userspace. If yes then we 1403 * continue in host kernel in V mode to deliver the MC event. 1404 */ 1405 rldicl. r11,r12,4,63 /* See if MC hit while in HV mode. */ 1406 beq 5f 1407 andi. r11,r12,MSR_PR /* See if coming from user. */ 1408 bne 9f /* continue in V mode if we are. */ 1409 14105: 1411#ifdef CONFIG_KVM_BOOK3S_64_HV 1412 /* 1413 * We are coming from kernel context. Check if we are coming from 1414 * guest. if yes, then we can continue. We will fall through 1415 * do_kvm_200->kvmppc_interrupt to deliver the MC event to guest. 1416 */ 1417 lbz r11,HSTATE_IN_GUEST(r13) 1418 cmpwi r11,0 /* Check if coming from guest */ 1419 bne 9f /* continue if we are. */ 1420#endif 1421 /* 1422 * At this point we are not sure about what context we come from. 1423 * Queue up the MCE event and return from the interrupt. 1424 * But before that, check if this is an un-recoverable exception. 1425 * If yes, then stay on emergency stack and panic. 1426 */ 1427 andi. r11,r12,MSR_RI 1428 bne 2f 14291: mfspr r11,SPRN_SRR0 1430 ld r10,PACAKBASE(r13) 1431 LOAD_HANDLER(r10,unrecover_mce) 1432 mtspr SPRN_SRR0,r10 1433 ld r10,PACAKMSR(r13) 1434 /* 1435 * We are going down. But there are chances that we might get hit by 1436 * another MCE during panic path and we may run into unstable state 1437 * with no way out. Hence, turn ME bit off while going down, so that 1438 * when another MCE is hit during panic path, system will checkstop 1439 * and hypervisor will get restarted cleanly by SP. 1440 */ 1441 li r3,MSR_ME 1442 andc r10,r10,r3 /* Turn off MSR_ME */ 1443 mtspr SPRN_SRR1,r10 1444 rfid 1445 b . 14462: 1447 /* 1448 * Check if we have successfully handled/recovered from error, if not 1449 * then stay on emergency stack and panic. 1450 */ 1451 ld r3,RESULT(r1) /* Load result */ 1452 cmpdi r3,0 /* see if we handled MCE successfully */ 1453 1454 beq 1b /* if !handled then panic */ 1455 /* 1456 * Return from MC interrupt. 1457 * Queue up the MCE event so that we can log it later, while 1458 * returning from kernel or opal call. 1459 */ 1460 bl machine_check_queue_event 1461 MACHINE_CHECK_HANDLER_WINDUP 1462 rfid 14639: 1464 /* Deliver the machine check to host kernel in V mode. */ 1465 MACHINE_CHECK_HANDLER_WINDUP 1466 b machine_check_pSeries 1467 1468unrecover_mce: 1469 /* Invoke machine_check_exception to print MCE event and panic. */ 1470 addi r3,r1,STACK_FRAME_OVERHEAD 1471 bl machine_check_exception 1472 /* 1473 * We will not reach here. Even if we did, there is no way out. Call 1474 * unrecoverable_exception and die. 1475 */ 14761: addi r3,r1,STACK_FRAME_OVERHEAD 1477 bl unrecoverable_exception 1478 b 1b 1479/* 1480 * r13 points to the PACA, r9 contains the saved CR, 1481 * r12 contain the saved SRR1, SRR0 is still ready for return 1482 * r3 has the faulting address 1483 * r9 - r13 are saved in paca->exslb. 1484 * r3 is saved in paca->slb_r3 1485 * We assume we aren't going to take any exceptions during this procedure. 1486 */ 1487slb_miss_realmode: 1488 mflr r10 1489#ifdef CONFIG_RELOCATABLE 1490 mtctr r11 1491#endif 1492 1493 stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */ 1494 std r10,PACA_EXSLB+EX_LR(r13) /* save LR */ 1495 1496 bl slb_allocate_realmode 1497 1498 /* All done -- return from exception. */ 1499 1500 ld r10,PACA_EXSLB+EX_LR(r13) 1501 ld r3,PACA_EXSLB+EX_R3(r13) 1502 lwz r9,PACA_EXSLB+EX_CCR(r13) /* get saved CR */ 1503 1504 mtlr r10 1505 1506 andi. r10,r12,MSR_RI /* check for unrecoverable exception */ 1507 beq- 2f 1508 1509.machine push 1510.machine "power4" 1511 mtcrf 0x80,r9 1512 mtcrf 0x01,r9 /* slb_allocate uses cr0 and cr7 */ 1513.machine pop 1514 1515 RESTORE_PPR_PACA(PACA_EXSLB, r9) 1516 ld r9,PACA_EXSLB+EX_R9(r13) 1517 ld r10,PACA_EXSLB+EX_R10(r13) 1518 ld r11,PACA_EXSLB+EX_R11(r13) 1519 ld r12,PACA_EXSLB+EX_R12(r13) 1520 ld r13,PACA_EXSLB+EX_R13(r13) 1521 rfid 1522 b . /* prevent speculative execution */ 1523 15242: mfspr r11,SPRN_SRR0 1525 ld r10,PACAKBASE(r13) 1526 LOAD_HANDLER(r10,unrecov_slb) 1527 mtspr SPRN_SRR0,r10 1528 ld r10,PACAKMSR(r13) 1529 mtspr SPRN_SRR1,r10 1530 rfid 1531 b . 1532 1533unrecov_slb: 1534 EXCEPTION_PROLOG_COMMON(0x4100, PACA_EXSLB) 1535 RECONCILE_IRQ_STATE(r10, r11) 1536 bl save_nvgprs 15371: addi r3,r1,STACK_FRAME_OVERHEAD 1538 bl unrecoverable_exception 1539 b 1b 1540 1541 1542#ifdef CONFIG_PPC_970_NAP 1543power4_fixup_nap: 1544 andc r9,r9,r10 1545 std r9,TI_LOCAL_FLAGS(r11) 1546 ld r10,_LINK(r1) /* make idle task do the */ 1547 std r10,_NIP(r1) /* equivalent of a blr */ 1548 blr 1549#endif 1550 1551/* 1552 * Hash table stuff 1553 */ 1554 .align 7 1555do_hash_page: 1556 std r3,_DAR(r1) 1557 std r4,_DSISR(r1) 1558 1559 andis. r0,r4,0xa410 /* weird error? */ 1560 bne- handle_page_fault /* if not, try to insert a HPTE */ 1561 andis. r0,r4,DSISR_DABRMATCH@h 1562 bne- handle_dabr_fault 1563 CURRENT_THREAD_INFO(r11, r1) 1564 lwz r0,TI_PREEMPT(r11) /* If we're in an "NMI" */ 1565 andis. r0,r0,NMI_MASK@h /* (i.e. an irq when soft-disabled) */ 1566 bne 77f /* then don't call hash_page now */ 1567 /* 1568 * We need to set the _PAGE_USER bit if MSR_PR is set or if we are 1569 * accessing a userspace segment (even from the kernel). We assume 1570 * kernel addresses always have the high bit set. 1571 */ 1572 rlwinm r4,r4,32-25+9,31-9,31-9 /* DSISR_STORE -> _PAGE_RW */ 1573 rotldi r0,r3,15 /* Move high bit into MSR_PR posn */ 1574 orc r0,r12,r0 /* MSR_PR | ~high_bit */ 1575 rlwimi r4,r0,32-13,30,30 /* becomes _PAGE_USER access bit */ 1576 ori r4,r4,1 /* add _PAGE_PRESENT */ 1577 rlwimi r4,r5,22+2,31-2,31-2 /* Set _PAGE_EXEC if trap is 0x400 */ 1578 1579 /* 1580 * r3 contains the faulting address 1581 * r4 contains the required access permissions 1582 * r5 contains the trap number 1583 * r6 contains dsisr 1584 * 1585 * at return r3 = 0 for success, 1 for page fault, negative for error 1586 */ 1587 ld r6,_DSISR(r1) 1588 bl hash_page /* build HPTE if possible */ 1589 cmpdi r3,0 /* see if hash_page succeeded */ 1590 1591 /* Success */ 1592 beq fast_exc_return_irq /* Return from exception on success */ 1593 1594 /* Error */ 1595 blt- 13f 1596 1597/* Here we have a page fault that hash_page can't handle. */ 1598handle_page_fault: 159911: ld r4,_DAR(r1) 1600 ld r5,_DSISR(r1) 1601 addi r3,r1,STACK_FRAME_OVERHEAD 1602 bl do_page_fault 1603 cmpdi r3,0 1604 beq+ 12f 1605 bl save_nvgprs 1606 mr r5,r3 1607 addi r3,r1,STACK_FRAME_OVERHEAD 1608 lwz r4,_DAR(r1) 1609 bl bad_page_fault 1610 b ret_from_except 1611 1612/* We have a data breakpoint exception - handle it */ 1613handle_dabr_fault: 1614 bl save_nvgprs 1615 ld r4,_DAR(r1) 1616 ld r5,_DSISR(r1) 1617 addi r3,r1,STACK_FRAME_OVERHEAD 1618 bl do_break 161912: b ret_from_except_lite 1620 1621 1622/* We have a page fault that hash_page could handle but HV refused 1623 * the PTE insertion 1624 */ 162513: bl save_nvgprs 1626 mr r5,r3 1627 addi r3,r1,STACK_FRAME_OVERHEAD 1628 ld r4,_DAR(r1) 1629 bl low_hash_fault 1630 b ret_from_except 1631 1632/* 1633 * We come here as a result of a DSI at a point where we don't want 1634 * to call hash_page, such as when we are accessing memory (possibly 1635 * user memory) inside a PMU interrupt that occurred while interrupts 1636 * were soft-disabled. We want to invoke the exception handler for 1637 * the access, or panic if there isn't a handler. 1638 */ 163977: bl save_nvgprs 1640 mr r4,r3 1641 addi r3,r1,STACK_FRAME_OVERHEAD 1642 li r5,SIGSEGV 1643 bl bad_page_fault 1644 b ret_from_except 1645 1646/* 1647 * Here we have detected that the kernel stack pointer is bad. 1648 * R9 contains the saved CR, r13 points to the paca, 1649 * r10 contains the (bad) kernel stack pointer, 1650 * r11 and r12 contain the saved SRR0 and SRR1. 1651 * We switch to using an emergency stack, save the registers there, 1652 * and call kernel_bad_stack(), which panics. 1653 */ 1654bad_stack: 1655 ld r1,PACAEMERGSP(r13) 1656 subi r1,r1,64+INT_FRAME_SIZE 1657 std r9,_CCR(r1) 1658 std r10,GPR1(r1) 1659 std r11,_NIP(r1) 1660 std r12,_MSR(r1) 1661 mfspr r11,SPRN_DAR 1662 mfspr r12,SPRN_DSISR 1663 std r11,_DAR(r1) 1664 std r12,_DSISR(r1) 1665 mflr r10 1666 mfctr r11 1667 mfxer r12 1668 std r10,_LINK(r1) 1669 std r11,_CTR(r1) 1670 std r12,_XER(r1) 1671 SAVE_GPR(0,r1) 1672 SAVE_GPR(2,r1) 1673 ld r10,EX_R3(r3) 1674 std r10,GPR3(r1) 1675 SAVE_GPR(4,r1) 1676 SAVE_4GPRS(5,r1) 1677 ld r9,EX_R9(r3) 1678 ld r10,EX_R10(r3) 1679 SAVE_2GPRS(9,r1) 1680 ld r9,EX_R11(r3) 1681 ld r10,EX_R12(r3) 1682 ld r11,EX_R13(r3) 1683 std r9,GPR11(r1) 1684 std r10,GPR12(r1) 1685 std r11,GPR13(r1) 1686BEGIN_FTR_SECTION 1687 ld r10,EX_CFAR(r3) 1688 std r10,ORIG_GPR3(r1) 1689END_FTR_SECTION_IFSET(CPU_FTR_CFAR) 1690 SAVE_8GPRS(14,r1) 1691 SAVE_10GPRS(22,r1) 1692 lhz r12,PACA_TRAP_SAVE(r13) 1693 std r12,_TRAP(r1) 1694 addi r11,r1,INT_FRAME_SIZE 1695 std r11,0(r1) 1696 li r12,0 1697 std r12,0(r11) 1698 ld r2,PACATOC(r13) 1699 ld r11,exception_marker@toc(r2) 1700 std r12,RESULT(r1) 1701 std r11,STACK_FRAME_OVERHEAD-16(r1) 17021: addi r3,r1,STACK_FRAME_OVERHEAD 1703 bl kernel_bad_stack 1704 b 1b 1705