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 beq cr1,2f 135 b power7_wakeup_noloss 1362: b power7_wakeup_loss 137 138 /* Fast Sleep wakeup on PowerNV */ 1398: GET_PACA(r13) 140 b power7_wakeup_tb_loss 141 1429: 143END_FTR_SECTION_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_206) 144#endif /* CONFIG_PPC_P7_NAP */ 145 EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common, EXC_STD, 146 NOTEST, 0x100) 147 148 . = 0x200 149machine_check_pSeries_1: 150 /* This is moved out of line as it can be patched by FW, but 151 * some code path might still want to branch into the original 152 * vector 153 */ 154 HMT_MEDIUM_PPR_DISCARD 155 SET_SCRATCH0(r13) /* save r13 */ 156#ifdef CONFIG_PPC_P7_NAP 157BEGIN_FTR_SECTION 158 /* Running native on arch 2.06 or later, check if we are 159 * waking up from nap. We only handle no state loss and 160 * supervisor state loss. We do -not- handle hypervisor 161 * state loss at this time. 162 */ 163 mfspr r13,SPRN_SRR1 164 rlwinm. r13,r13,47-31,30,31 165 OPT_GET_SPR(r13, SPRN_CFAR, CPU_FTR_CFAR) 166 beq 9f 167 168 mfspr r13,SPRN_SRR1 169 rlwinm. r13,r13,47-31,30,31 170 /* waking up from powersave (nap) state */ 171 cmpwi cr1,r13,2 172 /* Total loss of HV state is fatal. let's just stay stuck here */ 173 OPT_GET_SPR(r13, SPRN_CFAR, CPU_FTR_CFAR) 174 bgt cr1,. 1759: 176 OPT_SET_SPR(r13, SPRN_CFAR, CPU_FTR_CFAR) 177END_FTR_SECTION_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_206) 178#endif /* CONFIG_PPC_P7_NAP */ 179 EXCEPTION_PROLOG_0(PACA_EXMC) 180BEGIN_FTR_SECTION 181 b machine_check_pSeries_early 182FTR_SECTION_ELSE 183 b machine_check_pSeries_0 184ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE) 185 186 . = 0x300 187 .globl data_access_pSeries 188data_access_pSeries: 189 HMT_MEDIUM_PPR_DISCARD 190 SET_SCRATCH0(r13) 191 EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, data_access_common, EXC_STD, 192 KVMTEST, 0x300) 193 194 . = 0x380 195 .globl data_access_slb_pSeries 196data_access_slb_pSeries: 197 HMT_MEDIUM_PPR_DISCARD 198 SET_SCRATCH0(r13) 199 EXCEPTION_PROLOG_0(PACA_EXSLB) 200 EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST, 0x380) 201 std r3,PACA_EXSLB+EX_R3(r13) 202 mfspr r3,SPRN_DAR 203#ifdef __DISABLED__ 204 /* Keep that around for when we re-implement dynamic VSIDs */ 205 cmpdi r3,0 206 bge slb_miss_user_pseries 207#endif /* __DISABLED__ */ 208 mfspr r12,SPRN_SRR1 209#ifndef CONFIG_RELOCATABLE 210 b slb_miss_realmode 211#else 212 /* 213 * We can't just use a direct branch to slb_miss_realmode 214 * because the distance from here to there depends on where 215 * the kernel ends up being put. 216 */ 217 mfctr r11 218 ld r10,PACAKBASE(r13) 219 LOAD_HANDLER(r10, slb_miss_realmode) 220 mtctr r10 221 bctr 222#endif 223 224 STD_EXCEPTION_PSERIES(0x400, 0x400, instruction_access) 225 226 . = 0x480 227 .globl instruction_access_slb_pSeries 228instruction_access_slb_pSeries: 229 HMT_MEDIUM_PPR_DISCARD 230 SET_SCRATCH0(r13) 231 EXCEPTION_PROLOG_0(PACA_EXSLB) 232 EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST_PR, 0x480) 233 std r3,PACA_EXSLB+EX_R3(r13) 234 mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */ 235#ifdef __DISABLED__ 236 /* Keep that around for when we re-implement dynamic VSIDs */ 237 cmpdi r3,0 238 bge slb_miss_user_pseries 239#endif /* __DISABLED__ */ 240 mfspr r12,SPRN_SRR1 241#ifndef CONFIG_RELOCATABLE 242 b slb_miss_realmode 243#else 244 mfctr r11 245 ld r10,PACAKBASE(r13) 246 LOAD_HANDLER(r10, slb_miss_realmode) 247 mtctr r10 248 bctr 249#endif 250 251 /* We open code these as we can't have a ". = x" (even with 252 * x = "." within a feature section 253 */ 254 . = 0x500; 255 .globl hardware_interrupt_pSeries; 256 .globl hardware_interrupt_hv; 257hardware_interrupt_pSeries: 258hardware_interrupt_hv: 259 HMT_MEDIUM_PPR_DISCARD 260 BEGIN_FTR_SECTION 261 _MASKABLE_EXCEPTION_PSERIES(0x502, hardware_interrupt, 262 EXC_HV, SOFTEN_TEST_HV) 263 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0x502) 264 FTR_SECTION_ELSE 265 _MASKABLE_EXCEPTION_PSERIES(0x500, hardware_interrupt, 266 EXC_STD, SOFTEN_TEST_HV_201) 267 KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x500) 268 ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_206) 269 270 STD_EXCEPTION_PSERIES(0x600, 0x600, alignment) 271 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x600) 272 273 STD_EXCEPTION_PSERIES(0x700, 0x700, program_check) 274 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x700) 275 276 STD_EXCEPTION_PSERIES(0x800, 0x800, fp_unavailable) 277 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x800) 278 279 . = 0x900 280 .globl decrementer_pSeries 281decrementer_pSeries: 282 _MASKABLE_EXCEPTION_PSERIES(0x900, decrementer, EXC_STD, SOFTEN_TEST_PR) 283 284 STD_EXCEPTION_HV(0x980, 0x982, hdecrementer) 285 286 MASKABLE_EXCEPTION_PSERIES(0xa00, 0xa00, doorbell_super) 287 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xa00) 288 289 STD_EXCEPTION_PSERIES(0xb00, 0xb00, trap_0b) 290 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xb00) 291 292 . = 0xc00 293 .globl system_call_pSeries 294system_call_pSeries: 295 HMT_MEDIUM 296#ifdef CONFIG_KVM_BOOK3S_64_HANDLER 297 SET_SCRATCH0(r13) 298 GET_PACA(r13) 299 std r9,PACA_EXGEN+EX_R9(r13) 300 std r10,PACA_EXGEN+EX_R10(r13) 301 mfcr r9 302 KVMTEST(0xc00) 303 GET_SCRATCH0(r13) 304#endif 305 SYSCALL_PSERIES_1 306 SYSCALL_PSERIES_2_RFID 307 SYSCALL_PSERIES_3 308 KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xc00) 309 310 STD_EXCEPTION_PSERIES(0xd00, 0xd00, single_step) 311 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xd00) 312 313 /* At 0xe??? we have a bunch of hypervisor exceptions, we branch 314 * out of line to handle them 315 */ 316 . = 0xe00 317hv_data_storage_trampoline: 318 SET_SCRATCH0(r13) 319 EXCEPTION_PROLOG_0(PACA_EXGEN) 320 b h_data_storage_hv 321 322 . = 0xe20 323hv_instr_storage_trampoline: 324 SET_SCRATCH0(r13) 325 EXCEPTION_PROLOG_0(PACA_EXGEN) 326 b h_instr_storage_hv 327 328 . = 0xe40 329emulation_assist_trampoline: 330 SET_SCRATCH0(r13) 331 EXCEPTION_PROLOG_0(PACA_EXGEN) 332 b emulation_assist_hv 333 334 . = 0xe60 335hv_exception_trampoline: 336 SET_SCRATCH0(r13) 337 EXCEPTION_PROLOG_0(PACA_EXGEN) 338 b hmi_exception_early 339 340 . = 0xe80 341hv_doorbell_trampoline: 342 SET_SCRATCH0(r13) 343 EXCEPTION_PROLOG_0(PACA_EXGEN) 344 b h_doorbell_hv 345 346 /* We need to deal with the Altivec unavailable exception 347 * here which is at 0xf20, thus in the middle of the 348 * prolog code of the PerformanceMonitor one. A little 349 * trickery is thus necessary 350 */ 351 . = 0xf00 352performance_monitor_pseries_trampoline: 353 SET_SCRATCH0(r13) 354 EXCEPTION_PROLOG_0(PACA_EXGEN) 355 b performance_monitor_pSeries 356 357 . = 0xf20 358altivec_unavailable_pseries_trampoline: 359 SET_SCRATCH0(r13) 360 EXCEPTION_PROLOG_0(PACA_EXGEN) 361 b altivec_unavailable_pSeries 362 363 . = 0xf40 364vsx_unavailable_pseries_trampoline: 365 SET_SCRATCH0(r13) 366 EXCEPTION_PROLOG_0(PACA_EXGEN) 367 b vsx_unavailable_pSeries 368 369 . = 0xf60 370facility_unavailable_trampoline: 371 SET_SCRATCH0(r13) 372 EXCEPTION_PROLOG_0(PACA_EXGEN) 373 b facility_unavailable_pSeries 374 375 . = 0xf80 376hv_facility_unavailable_trampoline: 377 SET_SCRATCH0(r13) 378 EXCEPTION_PROLOG_0(PACA_EXGEN) 379 b facility_unavailable_hv 380 381#ifdef CONFIG_CBE_RAS 382 STD_EXCEPTION_HV(0x1200, 0x1202, cbe_system_error) 383 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1202) 384#endif /* CONFIG_CBE_RAS */ 385 386 STD_EXCEPTION_PSERIES(0x1300, 0x1300, instruction_breakpoint) 387 KVM_HANDLER_PR_SKIP(PACA_EXGEN, EXC_STD, 0x1300) 388 389 . = 0x1500 390 .global denorm_exception_hv 391denorm_exception_hv: 392 HMT_MEDIUM_PPR_DISCARD 393 mtspr SPRN_SPRG_HSCRATCH0,r13 394 EXCEPTION_PROLOG_0(PACA_EXGEN) 395 EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, 0x1500) 396 397#ifdef CONFIG_PPC_DENORMALISATION 398 mfspr r10,SPRN_HSRR1 399 mfspr r11,SPRN_HSRR0 /* save HSRR0 */ 400 andis. r10,r10,(HSRR1_DENORM)@h /* denorm? */ 401 addi r11,r11,-4 /* HSRR0 is next instruction */ 402 bne+ denorm_assist 403#endif 404 405 KVMTEST(0x1500) 406 EXCEPTION_PROLOG_PSERIES_1(denorm_common, EXC_HV) 407 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x1500) 408 409#ifdef CONFIG_CBE_RAS 410 STD_EXCEPTION_HV(0x1600, 0x1602, cbe_maintenance) 411 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1602) 412#endif /* CONFIG_CBE_RAS */ 413 414 STD_EXCEPTION_PSERIES(0x1700, 0x1700, altivec_assist) 415 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x1700) 416 417#ifdef CONFIG_CBE_RAS 418 STD_EXCEPTION_HV(0x1800, 0x1802, cbe_thermal) 419 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1802) 420#else 421 . = 0x1800 422#endif /* CONFIG_CBE_RAS */ 423 424 425/*** Out of line interrupts support ***/ 426 427 .align 7 428 /* moved from 0x200 */ 429machine_check_pSeries_early: 430BEGIN_FTR_SECTION 431 EXCEPTION_PROLOG_1(PACA_EXMC, NOTEST, 0x200) 432 /* 433 * Register contents: 434 * R13 = PACA 435 * R9 = CR 436 * Original R9 to R13 is saved on PACA_EXMC 437 * 438 * Switch to mc_emergency stack and handle re-entrancy (we limit 439 * the nested MCE upto level 4 to avoid stack overflow). 440 * Save MCE registers srr1, srr0, dar and dsisr and then set ME=1 441 * 442 * We use paca->in_mce to check whether this is the first entry or 443 * nested machine check. We increment paca->in_mce to track nested 444 * machine checks. 445 * 446 * If this is the first entry then set stack pointer to 447 * paca->mc_emergency_sp, otherwise r1 is already pointing to 448 * stack frame on mc_emergency stack. 449 * 450 * NOTE: We are here with MSR_ME=0 (off), which means we risk a 451 * checkstop if we get another machine check exception before we do 452 * rfid with MSR_ME=1. 453 */ 454 mr r11,r1 /* Save r1 */ 455 lhz r10,PACA_IN_MCE(r13) 456 cmpwi r10,0 /* Are we in nested machine check */ 457 bne 0f /* Yes, we are. */ 458 /* First machine check entry */ 459 ld r1,PACAMCEMERGSP(r13) /* Use MC emergency stack */ 4600: subi r1,r1,INT_FRAME_SIZE /* alloc stack frame */ 461 addi r10,r10,1 /* increment paca->in_mce */ 462 sth r10,PACA_IN_MCE(r13) 463 /* Limit nested MCE to level 4 to avoid stack overflow */ 464 cmpwi r10,4 465 bgt 2f /* Check if we hit limit of 4 */ 466 std r11,GPR1(r1) /* Save r1 on the stack. */ 467 std r11,0(r1) /* make stack chain pointer */ 468 mfspr r11,SPRN_SRR0 /* Save SRR0 */ 469 std r11,_NIP(r1) 470 mfspr r11,SPRN_SRR1 /* Save SRR1 */ 471 std r11,_MSR(r1) 472 mfspr r11,SPRN_DAR /* Save DAR */ 473 std r11,_DAR(r1) 474 mfspr r11,SPRN_DSISR /* Save DSISR */ 475 std r11,_DSISR(r1) 476 std r9,_CCR(r1) /* Save CR in stackframe */ 477 /* Save r9 through r13 from EXMC save area to stack frame. */ 478 EXCEPTION_PROLOG_COMMON_2(PACA_EXMC) 479 mfmsr r11 /* get MSR value */ 480 ori r11,r11,MSR_ME /* turn on ME bit */ 481 ori r11,r11,MSR_RI /* turn on RI bit */ 482 ld r12,PACAKBASE(r13) /* get high part of &label */ 483 LOAD_HANDLER(r12, machine_check_handle_early) 4841: mtspr SPRN_SRR0,r12 485 mtspr SPRN_SRR1,r11 486 rfid 487 b . /* prevent speculative execution */ 4882: 489 /* Stack overflow. Stay on emergency stack and panic. 490 * Keep the ME bit off while panic-ing, so that if we hit 491 * another machine check we checkstop. 492 */ 493 addi r1,r1,INT_FRAME_SIZE /* go back to previous stack frame */ 494 ld r11,PACAKMSR(r13) 495 ld r12,PACAKBASE(r13) 496 LOAD_HANDLER(r12, unrecover_mce) 497 li r10,MSR_ME 498 andc r11,r11,r10 /* Turn off MSR_ME */ 499 b 1b 500 b . /* prevent speculative execution */ 501END_FTR_SECTION_IFSET(CPU_FTR_HVMODE) 502 503machine_check_pSeries: 504 .globl machine_check_fwnmi 505machine_check_fwnmi: 506 HMT_MEDIUM_PPR_DISCARD 507 SET_SCRATCH0(r13) /* save r13 */ 508 EXCEPTION_PROLOG_0(PACA_EXMC) 509machine_check_pSeries_0: 510 EXCEPTION_PROLOG_1(PACA_EXMC, KVMTEST, 0x200) 511 EXCEPTION_PROLOG_PSERIES_1(machine_check_common, EXC_STD) 512 KVM_HANDLER_SKIP(PACA_EXMC, EXC_STD, 0x200) 513 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x300) 514 KVM_HANDLER_SKIP(PACA_EXSLB, EXC_STD, 0x380) 515 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x400) 516 KVM_HANDLER_PR(PACA_EXSLB, EXC_STD, 0x480) 517 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x900) 518 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0x982) 519 520#ifdef CONFIG_PPC_DENORMALISATION 521denorm_assist: 522BEGIN_FTR_SECTION 523/* 524 * To denormalise we need to move a copy of the register to itself. 525 * For POWER6 do that here for all FP regs. 526 */ 527 mfmsr r10 528 ori r10,r10,(MSR_FP|MSR_FE0|MSR_FE1) 529 xori r10,r10,(MSR_FE0|MSR_FE1) 530 mtmsrd r10 531 sync 532 533#define FMR2(n) fmr (n), (n) ; fmr n+1, n+1 534#define FMR4(n) FMR2(n) ; FMR2(n+2) 535#define FMR8(n) FMR4(n) ; FMR4(n+4) 536#define FMR16(n) FMR8(n) ; FMR8(n+8) 537#define FMR32(n) FMR16(n) ; FMR16(n+16) 538 FMR32(0) 539 540FTR_SECTION_ELSE 541/* 542 * To denormalise we need to move a copy of the register to itself. 543 * For POWER7 do that here for the first 32 VSX registers only. 544 */ 545 mfmsr r10 546 oris r10,r10,MSR_VSX@h 547 mtmsrd r10 548 sync 549 550#define XVCPSGNDP2(n) XVCPSGNDP(n,n,n) ; XVCPSGNDP(n+1,n+1,n+1) 551#define XVCPSGNDP4(n) XVCPSGNDP2(n) ; XVCPSGNDP2(n+2) 552#define XVCPSGNDP8(n) XVCPSGNDP4(n) ; XVCPSGNDP4(n+4) 553#define XVCPSGNDP16(n) XVCPSGNDP8(n) ; XVCPSGNDP8(n+8) 554#define XVCPSGNDP32(n) XVCPSGNDP16(n) ; XVCPSGNDP16(n+16) 555 XVCPSGNDP32(0) 556 557ALT_FTR_SECTION_END_IFCLR(CPU_FTR_ARCH_206) 558 559BEGIN_FTR_SECTION 560 b denorm_done 561END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) 562/* 563 * To denormalise we need to move a copy of the register to itself. 564 * For POWER8 we need to do that for all 64 VSX registers 565 */ 566 XVCPSGNDP32(32) 567denorm_done: 568 mtspr SPRN_HSRR0,r11 569 mtcrf 0x80,r9 570 ld r9,PACA_EXGEN+EX_R9(r13) 571 RESTORE_PPR_PACA(PACA_EXGEN, r10) 572BEGIN_FTR_SECTION 573 ld r10,PACA_EXGEN+EX_CFAR(r13) 574 mtspr SPRN_CFAR,r10 575END_FTR_SECTION_IFSET(CPU_FTR_CFAR) 576 ld r10,PACA_EXGEN+EX_R10(r13) 577 ld r11,PACA_EXGEN+EX_R11(r13) 578 ld r12,PACA_EXGEN+EX_R12(r13) 579 ld r13,PACA_EXGEN+EX_R13(r13) 580 HRFID 581 b . 582#endif 583 584 .align 7 585 /* moved from 0xe00 */ 586 STD_EXCEPTION_HV_OOL(0xe02, h_data_storage) 587 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0xe02) 588 STD_EXCEPTION_HV_OOL(0xe22, h_instr_storage) 589 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe22) 590 STD_EXCEPTION_HV_OOL(0xe42, emulation_assist) 591 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe42) 592 MASKABLE_EXCEPTION_HV_OOL(0xe62, hmi_exception) 593 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe62) 594 595 MASKABLE_EXCEPTION_HV_OOL(0xe82, h_doorbell) 596 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe82) 597 598 /* moved from 0xf00 */ 599 STD_EXCEPTION_PSERIES_OOL(0xf00, performance_monitor) 600 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf00) 601 STD_EXCEPTION_PSERIES_OOL(0xf20, altivec_unavailable) 602 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf20) 603 STD_EXCEPTION_PSERIES_OOL(0xf40, vsx_unavailable) 604 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf40) 605 STD_EXCEPTION_PSERIES_OOL(0xf60, facility_unavailable) 606 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf60) 607 STD_EXCEPTION_HV_OOL(0xf82, facility_unavailable) 608 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xf82) 609 610/* 611 * An interrupt came in while soft-disabled. We set paca->irq_happened, then: 612 * - If it was a decrementer interrupt, we bump the dec to max and and return. 613 * - If it was a doorbell we return immediately since doorbells are edge 614 * triggered and won't automatically refire. 615 * - If it was a HMI we return immediately since we handled it in realmode 616 * and it won't refire. 617 * - else we hard disable and return. 618 * This is called with r10 containing the value to OR to the paca field. 619 */ 620#define MASKED_INTERRUPT(_H) \ 621masked_##_H##interrupt: \ 622 std r11,PACA_EXGEN+EX_R11(r13); \ 623 lbz r11,PACAIRQHAPPENED(r13); \ 624 or r11,r11,r10; \ 625 stb r11,PACAIRQHAPPENED(r13); \ 626 cmpwi r10,PACA_IRQ_DEC; \ 627 bne 1f; \ 628 lis r10,0x7fff; \ 629 ori r10,r10,0xffff; \ 630 mtspr SPRN_DEC,r10; \ 631 b 2f; \ 6321: cmpwi r10,PACA_IRQ_DBELL; \ 633 beq 2f; \ 634 cmpwi r10,PACA_IRQ_HMI; \ 635 beq 2f; \ 636 mfspr r10,SPRN_##_H##SRR1; \ 637 rldicl r10,r10,48,1; /* clear MSR_EE */ \ 638 rotldi r10,r10,16; \ 639 mtspr SPRN_##_H##SRR1,r10; \ 6402: mtcrf 0x80,r9; \ 641 ld r9,PACA_EXGEN+EX_R9(r13); \ 642 ld r10,PACA_EXGEN+EX_R10(r13); \ 643 ld r11,PACA_EXGEN+EX_R11(r13); \ 644 GET_SCRATCH0(r13); \ 645 ##_H##rfid; \ 646 b . 647 648 MASKED_INTERRUPT() 649 MASKED_INTERRUPT(H) 650 651/* 652 * Called from arch_local_irq_enable when an interrupt needs 653 * to be resent. r3 contains 0x500, 0x900, 0xa00 or 0xe80 to indicate 654 * which kind of interrupt. MSR:EE is already off. We generate a 655 * stackframe like if a real interrupt had happened. 656 * 657 * Note: While MSR:EE is off, we need to make sure that _MSR 658 * in the generated frame has EE set to 1 or the exception 659 * handler will not properly re-enable them. 660 */ 661_GLOBAL(__replay_interrupt) 662 /* We are going to jump to the exception common code which 663 * will retrieve various register values from the PACA which 664 * we don't give a damn about, so we don't bother storing them. 665 */ 666 mfmsr r12 667 mflr r11 668 mfcr r9 669 ori r12,r12,MSR_EE 670 cmpwi r3,0x900 671 beq decrementer_common 672 cmpwi r3,0x500 673 beq hardware_interrupt_common 674BEGIN_FTR_SECTION 675 cmpwi r3,0xe80 676 beq h_doorbell_common 677FTR_SECTION_ELSE 678 cmpwi r3,0xa00 679 beq doorbell_super_common 680ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE) 681 blr 682 683#ifdef CONFIG_PPC_PSERIES 684/* 685 * Vectors for the FWNMI option. Share common code. 686 */ 687 .globl system_reset_fwnmi 688 .align 7 689system_reset_fwnmi: 690 HMT_MEDIUM_PPR_DISCARD 691 SET_SCRATCH0(r13) /* save r13 */ 692 EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common, EXC_STD, 693 NOTEST, 0x100) 694 695#endif /* CONFIG_PPC_PSERIES */ 696 697#ifdef __DISABLED__ 698/* 699 * This is used for when the SLB miss handler has to go virtual, 700 * which doesn't happen for now anymore but will once we re-implement 701 * dynamic VSIDs for shared page tables 702 */ 703slb_miss_user_pseries: 704 std r10,PACA_EXGEN+EX_R10(r13) 705 std r11,PACA_EXGEN+EX_R11(r13) 706 std r12,PACA_EXGEN+EX_R12(r13) 707 GET_SCRATCH0(r10) 708 ld r11,PACA_EXSLB+EX_R9(r13) 709 ld r12,PACA_EXSLB+EX_R3(r13) 710 std r10,PACA_EXGEN+EX_R13(r13) 711 std r11,PACA_EXGEN+EX_R9(r13) 712 std r12,PACA_EXGEN+EX_R3(r13) 713 clrrdi r12,r13,32 714 mfmsr r10 715 mfspr r11,SRR0 /* save SRR0 */ 716 ori r12,r12,slb_miss_user_common@l /* virt addr of handler */ 717 ori r10,r10,MSR_IR|MSR_DR|MSR_RI 718 mtspr SRR0,r12 719 mfspr r12,SRR1 /* and SRR1 */ 720 mtspr SRR1,r10 721 rfid 722 b . /* prevent spec. execution */ 723#endif /* __DISABLED__ */ 724 725#ifdef CONFIG_KVM_BOOK3S_64_HANDLER 726kvmppc_skip_interrupt: 727 /* 728 * Here all GPRs are unchanged from when the interrupt happened 729 * except for r13, which is saved in SPRG_SCRATCH0. 730 */ 731 mfspr r13, SPRN_SRR0 732 addi r13, r13, 4 733 mtspr SPRN_SRR0, r13 734 GET_SCRATCH0(r13) 735 rfid 736 b . 737 738kvmppc_skip_Hinterrupt: 739 /* 740 * Here all GPRs are unchanged from when the interrupt happened 741 * except for r13, which is saved in SPRG_SCRATCH0. 742 */ 743 mfspr r13, SPRN_HSRR0 744 addi r13, r13, 4 745 mtspr SPRN_HSRR0, r13 746 GET_SCRATCH0(r13) 747 hrfid 748 b . 749#endif 750 751/* 752 * Code from here down to __end_handlers is invoked from the 753 * exception prologs above. Because the prologs assemble the 754 * addresses of these handlers using the LOAD_HANDLER macro, 755 * which uses an ori instruction, these handlers must be in 756 * the first 64k of the kernel image. 757 */ 758 759/*** Common interrupt handlers ***/ 760 761 STD_EXCEPTION_COMMON(0x100, system_reset, system_reset_exception) 762 763 STD_EXCEPTION_COMMON_ASYNC(0x500, hardware_interrupt, do_IRQ) 764 STD_EXCEPTION_COMMON_ASYNC(0x900, decrementer, timer_interrupt) 765 STD_EXCEPTION_COMMON(0x980, hdecrementer, hdec_interrupt) 766#ifdef CONFIG_PPC_DOORBELL 767 STD_EXCEPTION_COMMON_ASYNC(0xa00, doorbell_super, doorbell_exception) 768#else 769 STD_EXCEPTION_COMMON_ASYNC(0xa00, doorbell_super, unknown_exception) 770#endif 771 STD_EXCEPTION_COMMON(0xb00, trap_0b, unknown_exception) 772 STD_EXCEPTION_COMMON(0xd00, single_step, single_step_exception) 773 STD_EXCEPTION_COMMON(0xe00, trap_0e, unknown_exception) 774 STD_EXCEPTION_COMMON(0xe40, emulation_assist, emulation_assist_interrupt) 775 STD_EXCEPTION_COMMON_ASYNC(0xe60, hmi_exception, handle_hmi_exception) 776#ifdef CONFIG_PPC_DOORBELL 777 STD_EXCEPTION_COMMON_ASYNC(0xe80, h_doorbell, doorbell_exception) 778#else 779 STD_EXCEPTION_COMMON_ASYNC(0xe80, h_doorbell, unknown_exception) 780#endif 781 STD_EXCEPTION_COMMON_ASYNC(0xf00, performance_monitor, performance_monitor_exception) 782 STD_EXCEPTION_COMMON(0x1300, instruction_breakpoint, instruction_breakpoint_exception) 783 STD_EXCEPTION_COMMON(0x1502, denorm, unknown_exception) 784#ifdef CONFIG_ALTIVEC 785 STD_EXCEPTION_COMMON(0x1700, altivec_assist, altivec_assist_exception) 786#else 787 STD_EXCEPTION_COMMON(0x1700, altivec_assist, unknown_exception) 788#endif 789#ifdef CONFIG_CBE_RAS 790 STD_EXCEPTION_COMMON(0x1200, cbe_system_error, cbe_system_error_exception) 791 STD_EXCEPTION_COMMON(0x1600, cbe_maintenance, cbe_maintenance_exception) 792 STD_EXCEPTION_COMMON(0x1800, cbe_thermal, cbe_thermal_exception) 793#endif /* CONFIG_CBE_RAS */ 794 795 /* 796 * Relocation-on interrupts: A subset of the interrupts can be delivered 797 * with IR=1/DR=1, if AIL==2 and MSR.HV won't be changed by delivering 798 * it. Addresses are the same as the original interrupt addresses, but 799 * offset by 0xc000000000004000. 800 * It's impossible to receive interrupts below 0x300 via this mechanism. 801 * KVM: None of these traps are from the guest ; anything that escalated 802 * to HV=1 from HV=0 is delivered via real mode handlers. 803 */ 804 805 /* 806 * This uses the standard macro, since the original 0x300 vector 807 * only has extra guff for STAB-based processors -- which never 808 * come here. 809 */ 810 STD_RELON_EXCEPTION_PSERIES(0x4300, 0x300, data_access) 811 . = 0x4380 812 .globl data_access_slb_relon_pSeries 813data_access_slb_relon_pSeries: 814 SET_SCRATCH0(r13) 815 EXCEPTION_PROLOG_0(PACA_EXSLB) 816 EXCEPTION_PROLOG_1(PACA_EXSLB, NOTEST, 0x380) 817 std r3,PACA_EXSLB+EX_R3(r13) 818 mfspr r3,SPRN_DAR 819 mfspr r12,SPRN_SRR1 820#ifndef CONFIG_RELOCATABLE 821 b slb_miss_realmode 822#else 823 /* 824 * We can't just use a direct branch to slb_miss_realmode 825 * because the distance from here to there depends on where 826 * the kernel ends up being put. 827 */ 828 mfctr r11 829 ld r10,PACAKBASE(r13) 830 LOAD_HANDLER(r10, slb_miss_realmode) 831 mtctr r10 832 bctr 833#endif 834 835 STD_RELON_EXCEPTION_PSERIES(0x4400, 0x400, instruction_access) 836 . = 0x4480 837 .globl instruction_access_slb_relon_pSeries 838instruction_access_slb_relon_pSeries: 839 SET_SCRATCH0(r13) 840 EXCEPTION_PROLOG_0(PACA_EXSLB) 841 EXCEPTION_PROLOG_1(PACA_EXSLB, NOTEST, 0x480) 842 std r3,PACA_EXSLB+EX_R3(r13) 843 mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */ 844 mfspr r12,SPRN_SRR1 845#ifndef CONFIG_RELOCATABLE 846 b slb_miss_realmode 847#else 848 mfctr r11 849 ld r10,PACAKBASE(r13) 850 LOAD_HANDLER(r10, slb_miss_realmode) 851 mtctr r10 852 bctr 853#endif 854 855 . = 0x4500 856 .globl hardware_interrupt_relon_pSeries; 857 .globl hardware_interrupt_relon_hv; 858hardware_interrupt_relon_pSeries: 859hardware_interrupt_relon_hv: 860 BEGIN_FTR_SECTION 861 _MASKABLE_RELON_EXCEPTION_PSERIES(0x502, hardware_interrupt, EXC_HV, SOFTEN_TEST_HV) 862 FTR_SECTION_ELSE 863 _MASKABLE_RELON_EXCEPTION_PSERIES(0x500, hardware_interrupt, EXC_STD, SOFTEN_TEST_PR) 864 ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE) 865 STD_RELON_EXCEPTION_PSERIES(0x4600, 0x600, alignment) 866 STD_RELON_EXCEPTION_PSERIES(0x4700, 0x700, program_check) 867 STD_RELON_EXCEPTION_PSERIES(0x4800, 0x800, fp_unavailable) 868 MASKABLE_RELON_EXCEPTION_PSERIES(0x4900, 0x900, decrementer) 869 STD_RELON_EXCEPTION_HV(0x4980, 0x982, hdecrementer) 870 MASKABLE_RELON_EXCEPTION_PSERIES(0x4a00, 0xa00, doorbell_super) 871 STD_RELON_EXCEPTION_PSERIES(0x4b00, 0xb00, trap_0b) 872 873 . = 0x4c00 874 .globl system_call_relon_pSeries 875system_call_relon_pSeries: 876 HMT_MEDIUM 877 SYSCALL_PSERIES_1 878 SYSCALL_PSERIES_2_DIRECT 879 SYSCALL_PSERIES_3 880 881 STD_RELON_EXCEPTION_PSERIES(0x4d00, 0xd00, single_step) 882 883 . = 0x4e00 884 b . /* Can't happen, see v2.07 Book III-S section 6.5 */ 885 886 . = 0x4e20 887 b . /* Can't happen, see v2.07 Book III-S section 6.5 */ 888 889 . = 0x4e40 890emulation_assist_relon_trampoline: 891 SET_SCRATCH0(r13) 892 EXCEPTION_PROLOG_0(PACA_EXGEN) 893 b emulation_assist_relon_hv 894 895 . = 0x4e60 896 b . /* Can't happen, see v2.07 Book III-S section 6.5 */ 897 898 . = 0x4e80 899h_doorbell_relon_trampoline: 900 SET_SCRATCH0(r13) 901 EXCEPTION_PROLOG_0(PACA_EXGEN) 902 b h_doorbell_relon_hv 903 904 . = 0x4f00 905performance_monitor_relon_pseries_trampoline: 906 SET_SCRATCH0(r13) 907 EXCEPTION_PROLOG_0(PACA_EXGEN) 908 b performance_monitor_relon_pSeries 909 910 . = 0x4f20 911altivec_unavailable_relon_pseries_trampoline: 912 SET_SCRATCH0(r13) 913 EXCEPTION_PROLOG_0(PACA_EXGEN) 914 b altivec_unavailable_relon_pSeries 915 916 . = 0x4f40 917vsx_unavailable_relon_pseries_trampoline: 918 SET_SCRATCH0(r13) 919 EXCEPTION_PROLOG_0(PACA_EXGEN) 920 b vsx_unavailable_relon_pSeries 921 922 . = 0x4f60 923facility_unavailable_relon_trampoline: 924 SET_SCRATCH0(r13) 925 EXCEPTION_PROLOG_0(PACA_EXGEN) 926 b facility_unavailable_relon_pSeries 927 928 . = 0x4f80 929hv_facility_unavailable_relon_trampoline: 930 SET_SCRATCH0(r13) 931 EXCEPTION_PROLOG_0(PACA_EXGEN) 932 b hv_facility_unavailable_relon_hv 933 934 STD_RELON_EXCEPTION_PSERIES(0x5300, 0x1300, instruction_breakpoint) 935#ifdef CONFIG_PPC_DENORMALISATION 936 . = 0x5500 937 b denorm_exception_hv 938#endif 939 STD_RELON_EXCEPTION_PSERIES(0x5700, 0x1700, altivec_assist) 940 941 /* Other future vectors */ 942 .align 7 943 .globl __end_interrupts 944__end_interrupts: 945 946 .align 7 947system_call_entry_direct: 948#if defined(CONFIG_RELOCATABLE) 949 /* The first level prologue may have used LR to get here, saving 950 * orig in r10. To save hacking/ifdeffing common code, restore here. 951 */ 952 mtlr r10 953#endif 954system_call_entry: 955 b system_call_common 956 957ppc64_runlatch_on_trampoline: 958 b __ppc64_runlatch_on 959 960/* 961 * Here r13 points to the paca, r9 contains the saved CR, 962 * SRR0 and SRR1 are saved in r11 and r12, 963 * r9 - r13 are saved in paca->exgen. 964 */ 965 .align 7 966 .globl data_access_common 967data_access_common: 968 mfspr r10,SPRN_DAR 969 std r10,PACA_EXGEN+EX_DAR(r13) 970 mfspr r10,SPRN_DSISR 971 stw r10,PACA_EXGEN+EX_DSISR(r13) 972 EXCEPTION_PROLOG_COMMON(0x300, PACA_EXGEN) 973 RECONCILE_IRQ_STATE(r10, r11) 974 ld r12,_MSR(r1) 975 ld r3,PACA_EXGEN+EX_DAR(r13) 976 lwz r4,PACA_EXGEN+EX_DSISR(r13) 977 li r5,0x300 978 b do_hash_page /* Try to handle as hpte fault */ 979 980 .align 7 981 .globl h_data_storage_common 982h_data_storage_common: 983 mfspr r10,SPRN_HDAR 984 std r10,PACA_EXGEN+EX_DAR(r13) 985 mfspr r10,SPRN_HDSISR 986 stw r10,PACA_EXGEN+EX_DSISR(r13) 987 EXCEPTION_PROLOG_COMMON(0xe00, PACA_EXGEN) 988 bl save_nvgprs 989 RECONCILE_IRQ_STATE(r10, r11) 990 addi r3,r1,STACK_FRAME_OVERHEAD 991 bl unknown_exception 992 b ret_from_except 993 994 .align 7 995 .globl instruction_access_common 996instruction_access_common: 997 EXCEPTION_PROLOG_COMMON(0x400, PACA_EXGEN) 998 RECONCILE_IRQ_STATE(r10, r11) 999 ld r12,_MSR(r1) 1000 ld r3,_NIP(r1) 1001 andis. r4,r12,0x5820 1002 li r5,0x400 1003 b do_hash_page /* Try to handle as hpte fault */ 1004 1005 STD_EXCEPTION_COMMON(0xe20, h_instr_storage, unknown_exception) 1006 1007/* 1008 * Here is the common SLB miss user that is used when going to virtual 1009 * mode for SLB misses, that is currently not used 1010 */ 1011#ifdef __DISABLED__ 1012 .align 7 1013 .globl slb_miss_user_common 1014slb_miss_user_common: 1015 mflr r10 1016 std r3,PACA_EXGEN+EX_DAR(r13) 1017 stw r9,PACA_EXGEN+EX_CCR(r13) 1018 std r10,PACA_EXGEN+EX_LR(r13) 1019 std r11,PACA_EXGEN+EX_SRR0(r13) 1020 bl slb_allocate_user 1021 1022 ld r10,PACA_EXGEN+EX_LR(r13) 1023 ld r3,PACA_EXGEN+EX_R3(r13) 1024 lwz r9,PACA_EXGEN+EX_CCR(r13) 1025 ld r11,PACA_EXGEN+EX_SRR0(r13) 1026 mtlr r10 1027 beq- slb_miss_fault 1028 1029 andi. r10,r12,MSR_RI /* check for unrecoverable exception */ 1030 beq- unrecov_user_slb 1031 mfmsr r10 1032 1033.machine push 1034.machine "power4" 1035 mtcrf 0x80,r9 1036.machine pop 1037 1038 clrrdi r10,r10,2 /* clear RI before setting SRR0/1 */ 1039 mtmsrd r10,1 1040 1041 mtspr SRR0,r11 1042 mtspr SRR1,r12 1043 1044 ld r9,PACA_EXGEN+EX_R9(r13) 1045 ld r10,PACA_EXGEN+EX_R10(r13) 1046 ld r11,PACA_EXGEN+EX_R11(r13) 1047 ld r12,PACA_EXGEN+EX_R12(r13) 1048 ld r13,PACA_EXGEN+EX_R13(r13) 1049 rfid 1050 b . 1051 1052slb_miss_fault: 1053 EXCEPTION_PROLOG_COMMON(0x380, PACA_EXGEN) 1054 ld r4,PACA_EXGEN+EX_DAR(r13) 1055 li r5,0 1056 std r4,_DAR(r1) 1057 std r5,_DSISR(r1) 1058 b handle_page_fault 1059 1060unrecov_user_slb: 1061 EXCEPTION_PROLOG_COMMON(0x4200, PACA_EXGEN) 1062 RECONCILE_IRQ_STATE(r10, r11) 1063 bl save_nvgprs 10641: addi r3,r1,STACK_FRAME_OVERHEAD 1065 bl unrecoverable_exception 1066 b 1b 1067 1068#endif /* __DISABLED__ */ 1069 1070 1071 /* 1072 * Machine check is different because we use a different 1073 * save area: PACA_EXMC instead of PACA_EXGEN. 1074 */ 1075 .align 7 1076 .globl machine_check_common 1077machine_check_common: 1078 1079 mfspr r10,SPRN_DAR 1080 std r10,PACA_EXGEN+EX_DAR(r13) 1081 mfspr r10,SPRN_DSISR 1082 stw r10,PACA_EXGEN+EX_DSISR(r13) 1083 EXCEPTION_PROLOG_COMMON(0x200, PACA_EXMC) 1084 FINISH_NAP 1085 RECONCILE_IRQ_STATE(r10, r11) 1086 ld r3,PACA_EXGEN+EX_DAR(r13) 1087 lwz r4,PACA_EXGEN+EX_DSISR(r13) 1088 std r3,_DAR(r1) 1089 std r4,_DSISR(r1) 1090 bl save_nvgprs 1091 addi r3,r1,STACK_FRAME_OVERHEAD 1092 bl machine_check_exception 1093 b ret_from_except 1094 1095 .align 7 1096 .globl alignment_common 1097alignment_common: 1098 mfspr r10,SPRN_DAR 1099 std r10,PACA_EXGEN+EX_DAR(r13) 1100 mfspr r10,SPRN_DSISR 1101 stw r10,PACA_EXGEN+EX_DSISR(r13) 1102 EXCEPTION_PROLOG_COMMON(0x600, PACA_EXGEN) 1103 ld r3,PACA_EXGEN+EX_DAR(r13) 1104 lwz r4,PACA_EXGEN+EX_DSISR(r13) 1105 std r3,_DAR(r1) 1106 std r4,_DSISR(r1) 1107 bl save_nvgprs 1108 RECONCILE_IRQ_STATE(r10, r11) 1109 addi r3,r1,STACK_FRAME_OVERHEAD 1110 bl alignment_exception 1111 b ret_from_except 1112 1113 .align 7 1114 .globl program_check_common 1115program_check_common: 1116 EXCEPTION_PROLOG_COMMON(0x700, PACA_EXGEN) 1117 bl save_nvgprs 1118 RECONCILE_IRQ_STATE(r10, r11) 1119 addi r3,r1,STACK_FRAME_OVERHEAD 1120 bl program_check_exception 1121 b ret_from_except 1122 1123 .align 7 1124 .globl fp_unavailable_common 1125fp_unavailable_common: 1126 EXCEPTION_PROLOG_COMMON(0x800, PACA_EXGEN) 1127 bne 1f /* if from user, just load it up */ 1128 bl save_nvgprs 1129 RECONCILE_IRQ_STATE(r10, r11) 1130 addi r3,r1,STACK_FRAME_OVERHEAD 1131 bl kernel_fp_unavailable_exception 1132 BUG_OPCODE 11331: 1134#ifdef CONFIG_PPC_TRANSACTIONAL_MEM 1135BEGIN_FTR_SECTION 1136 /* Test if 2 TM state bits are zero. If non-zero (ie. userspace was in 1137 * transaction), go do TM stuff 1138 */ 1139 rldicl. r0, r12, (64-MSR_TS_LG), (64-2) 1140 bne- 2f 1141END_FTR_SECTION_IFSET(CPU_FTR_TM) 1142#endif 1143 bl load_up_fpu 1144 b fast_exception_return 1145#ifdef CONFIG_PPC_TRANSACTIONAL_MEM 11462: /* User process was in a transaction */ 1147 bl save_nvgprs 1148 RECONCILE_IRQ_STATE(r10, r11) 1149 addi r3,r1,STACK_FRAME_OVERHEAD 1150 bl fp_unavailable_tm 1151 b ret_from_except 1152#endif 1153 .align 7 1154 .globl altivec_unavailable_common 1155altivec_unavailable_common: 1156 EXCEPTION_PROLOG_COMMON(0xf20, PACA_EXGEN) 1157#ifdef CONFIG_ALTIVEC 1158BEGIN_FTR_SECTION 1159 beq 1f 1160#ifdef CONFIG_PPC_TRANSACTIONAL_MEM 1161 BEGIN_FTR_SECTION_NESTED(69) 1162 /* Test if 2 TM state bits are zero. If non-zero (ie. userspace was in 1163 * transaction), go do TM stuff 1164 */ 1165 rldicl. r0, r12, (64-MSR_TS_LG), (64-2) 1166 bne- 2f 1167 END_FTR_SECTION_NESTED(CPU_FTR_TM, CPU_FTR_TM, 69) 1168#endif 1169 bl load_up_altivec 1170 b fast_exception_return 1171#ifdef CONFIG_PPC_TRANSACTIONAL_MEM 11722: /* User process was in a transaction */ 1173 bl save_nvgprs 1174 RECONCILE_IRQ_STATE(r10, r11) 1175 addi r3,r1,STACK_FRAME_OVERHEAD 1176 bl altivec_unavailable_tm 1177 b ret_from_except 1178#endif 11791: 1180END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) 1181#endif 1182 bl save_nvgprs 1183 RECONCILE_IRQ_STATE(r10, r11) 1184 addi r3,r1,STACK_FRAME_OVERHEAD 1185 bl altivec_unavailable_exception 1186 b ret_from_except 1187 1188 .align 7 1189 .globl vsx_unavailable_common 1190vsx_unavailable_common: 1191 EXCEPTION_PROLOG_COMMON(0xf40, PACA_EXGEN) 1192#ifdef CONFIG_VSX 1193BEGIN_FTR_SECTION 1194 beq 1f 1195#ifdef CONFIG_PPC_TRANSACTIONAL_MEM 1196 BEGIN_FTR_SECTION_NESTED(69) 1197 /* Test if 2 TM state bits are zero. If non-zero (ie. userspace was in 1198 * transaction), go do TM stuff 1199 */ 1200 rldicl. r0, r12, (64-MSR_TS_LG), (64-2) 1201 bne- 2f 1202 END_FTR_SECTION_NESTED(CPU_FTR_TM, CPU_FTR_TM, 69) 1203#endif 1204 b load_up_vsx 1205#ifdef CONFIG_PPC_TRANSACTIONAL_MEM 12062: /* User process was in a transaction */ 1207 bl save_nvgprs 1208 RECONCILE_IRQ_STATE(r10, r11) 1209 addi r3,r1,STACK_FRAME_OVERHEAD 1210 bl vsx_unavailable_tm 1211 b ret_from_except 1212#endif 12131: 1214END_FTR_SECTION_IFSET(CPU_FTR_VSX) 1215#endif 1216 bl save_nvgprs 1217 RECONCILE_IRQ_STATE(r10, r11) 1218 addi r3,r1,STACK_FRAME_OVERHEAD 1219 bl vsx_unavailable_exception 1220 b ret_from_except 1221 1222 STD_EXCEPTION_COMMON(0xf60, facility_unavailable, facility_unavailable_exception) 1223 STD_EXCEPTION_COMMON(0xf80, hv_facility_unavailable, facility_unavailable_exception) 1224 1225 .align 7 1226 .globl __end_handlers 1227__end_handlers: 1228 1229 /* Equivalents to the above handlers for relocation-on interrupt vectors */ 1230 STD_RELON_EXCEPTION_HV_OOL(0xe40, emulation_assist) 1231 MASKABLE_RELON_EXCEPTION_HV_OOL(0xe80, h_doorbell) 1232 1233 STD_RELON_EXCEPTION_PSERIES_OOL(0xf00, performance_monitor) 1234 STD_RELON_EXCEPTION_PSERIES_OOL(0xf20, altivec_unavailable) 1235 STD_RELON_EXCEPTION_PSERIES_OOL(0xf40, vsx_unavailable) 1236 STD_RELON_EXCEPTION_PSERIES_OOL(0xf60, facility_unavailable) 1237 STD_RELON_EXCEPTION_HV_OOL(0xf80, hv_facility_unavailable) 1238 1239#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) 1240/* 1241 * Data area reserved for FWNMI option. 1242 * This address (0x7000) is fixed by the RPA. 1243 */ 1244 .= 0x7000 1245 .globl fwnmi_data_area 1246fwnmi_data_area: 1247 1248 /* pseries and powernv need to keep the whole page from 1249 * 0x7000 to 0x8000 free for use by the firmware 1250 */ 1251 . = 0x8000 1252#endif /* defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) */ 1253 1254 .globl hmi_exception_early 1255hmi_exception_early: 1256 EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, 0xe60) 1257 mr r10,r1 /* Save r1 */ 1258 ld r1,PACAEMERGSP(r13) /* Use emergency stack */ 1259 subi r1,r1,INT_FRAME_SIZE /* alloc stack frame */ 1260 std r9,_CCR(r1) /* save CR in stackframe */ 1261 mfspr r11,SPRN_HSRR0 /* Save HSRR0 */ 1262 std r11,_NIP(r1) /* save HSRR0 in stackframe */ 1263 mfspr r12,SPRN_HSRR1 /* Save SRR1 */ 1264 std r12,_MSR(r1) /* save SRR1 in stackframe */ 1265 std r10,0(r1) /* make stack chain pointer */ 1266 std r0,GPR0(r1) /* save r0 in stackframe */ 1267 std r10,GPR1(r1) /* save r1 in stackframe */ 1268 EXCEPTION_PROLOG_COMMON_2(PACA_EXGEN) 1269 EXCEPTION_PROLOG_COMMON_3(0xe60) 1270 addi r3,r1,STACK_FRAME_OVERHEAD 1271 bl hmi_exception_realmode 1272 /* Windup the stack. */ 1273 /* Move original HSRR0 and HSRR1 into the respective regs */ 1274 ld r9,_MSR(r1) 1275 mtspr SPRN_HSRR1,r9 1276 ld r3,_NIP(r1) 1277 mtspr SPRN_HSRR0,r3 1278 ld r9,_CTR(r1) 1279 mtctr r9 1280 ld r9,_XER(r1) 1281 mtxer r9 1282 ld r9,_LINK(r1) 1283 mtlr r9 1284 REST_GPR(0, r1) 1285 REST_8GPRS(2, r1) 1286 REST_GPR(10, r1) 1287 ld r11,_CCR(r1) 1288 mtcr r11 1289 REST_GPR(11, r1) 1290 REST_2GPRS(12, r1) 1291 /* restore original r1. */ 1292 ld r1,GPR1(r1) 1293 1294 /* 1295 * Go to virtual mode and pull the HMI event information from 1296 * firmware. 1297 */ 1298 .globl hmi_exception_after_realmode 1299hmi_exception_after_realmode: 1300 SET_SCRATCH0(r13) 1301 EXCEPTION_PROLOG_0(PACA_EXGEN) 1302 b hmi_exception_hv 1303 1304#ifdef CONFIG_PPC_POWERNV 1305_GLOBAL(opal_mc_secondary_handler) 1306 HMT_MEDIUM_PPR_DISCARD 1307 SET_SCRATCH0(r13) 1308 GET_PACA(r13) 1309 clrldi r3,r3,2 1310 tovirt(r3,r3) 1311 std r3,PACA_OPAL_MC_EVT(r13) 1312 ld r13,OPAL_MC_SRR0(r3) 1313 mtspr SPRN_SRR0,r13 1314 ld r13,OPAL_MC_SRR1(r3) 1315 mtspr SPRN_SRR1,r13 1316 ld r3,OPAL_MC_GPR3(r3) 1317 GET_SCRATCH0(r13) 1318 b machine_check_pSeries 1319#endif /* CONFIG_PPC_POWERNV */ 1320 1321 1322#define MACHINE_CHECK_HANDLER_WINDUP \ 1323 /* Clear MSR_RI before setting SRR0 and SRR1. */\ 1324 li r0,MSR_RI; \ 1325 mfmsr r9; /* get MSR value */ \ 1326 andc r9,r9,r0; \ 1327 mtmsrd r9,1; /* Clear MSR_RI */ \ 1328 /* Move original SRR0 and SRR1 into the respective regs */ \ 1329 ld r9,_MSR(r1); \ 1330 mtspr SPRN_SRR1,r9; \ 1331 ld r3,_NIP(r1); \ 1332 mtspr SPRN_SRR0,r3; \ 1333 ld r9,_CTR(r1); \ 1334 mtctr r9; \ 1335 ld r9,_XER(r1); \ 1336 mtxer r9; \ 1337 ld r9,_LINK(r1); \ 1338 mtlr r9; \ 1339 REST_GPR(0, r1); \ 1340 REST_8GPRS(2, r1); \ 1341 REST_GPR(10, r1); \ 1342 ld r11,_CCR(r1); \ 1343 mtcr r11; \ 1344 /* Decrement paca->in_mce. */ \ 1345 lhz r12,PACA_IN_MCE(r13); \ 1346 subi r12,r12,1; \ 1347 sth r12,PACA_IN_MCE(r13); \ 1348 REST_GPR(11, r1); \ 1349 REST_2GPRS(12, r1); \ 1350 /* restore original r1. */ \ 1351 ld r1,GPR1(r1) 1352 1353 /* 1354 * Handle machine check early in real mode. We come here with 1355 * ME=1, MMU (IR=0 and DR=0) off and using MC emergency stack. 1356 */ 1357 .align 7 1358 .globl machine_check_handle_early 1359machine_check_handle_early: 1360 std r0,GPR0(r1) /* Save r0 */ 1361 EXCEPTION_PROLOG_COMMON_3(0x200) 1362 bl save_nvgprs 1363 addi r3,r1,STACK_FRAME_OVERHEAD 1364 bl machine_check_early 1365 std r3,RESULT(r1) /* Save result */ 1366 ld r12,_MSR(r1) 1367#ifdef CONFIG_PPC_P7_NAP 1368 /* 1369 * Check if thread was in power saving mode. We come here when any 1370 * of the following is true: 1371 * a. thread wasn't in power saving mode 1372 * b. thread was in power saving mode with no state loss or 1373 * supervisor state loss 1374 * 1375 * Go back to nap again if (b) is true. 1376 */ 1377 rlwinm. r11,r12,47-31,30,31 /* Was it in power saving mode? */ 1378 beq 4f /* No, it wasn;t */ 1379 /* Thread was in power saving mode. Go back to nap again. */ 1380 cmpwi r11,2 1381 bne 3f 1382 /* Supervisor state loss */ 1383 li r0,1 1384 stb r0,PACA_NAPSTATELOST(r13) 13853: bl machine_check_queue_event 1386 MACHINE_CHECK_HANDLER_WINDUP 1387 GET_PACA(r13) 1388 ld r1,PACAR1(r13) 1389 b power7_enter_nap_mode 13904: 1391#endif 1392 /* 1393 * Check if we are coming from hypervisor userspace. If yes then we 1394 * continue in host kernel in V mode to deliver the MC event. 1395 */ 1396 rldicl. r11,r12,4,63 /* See if MC hit while in HV mode. */ 1397 beq 5f 1398 andi. r11,r12,MSR_PR /* See if coming from user. */ 1399 bne 9f /* continue in V mode if we are. */ 1400 14015: 1402#ifdef CONFIG_KVM_BOOK3S_64_HV 1403 /* 1404 * We are coming from kernel context. Check if we are coming from 1405 * guest. if yes, then we can continue. We will fall through 1406 * do_kvm_200->kvmppc_interrupt to deliver the MC event to guest. 1407 */ 1408 lbz r11,HSTATE_IN_GUEST(r13) 1409 cmpwi r11,0 /* Check if coming from guest */ 1410 bne 9f /* continue if we are. */ 1411#endif 1412 /* 1413 * At this point we are not sure about what context we come from. 1414 * Queue up the MCE event and return from the interrupt. 1415 * But before that, check if this is an un-recoverable exception. 1416 * If yes, then stay on emergency stack and panic. 1417 */ 1418 andi. r11,r12,MSR_RI 1419 bne 2f 14201: mfspr r11,SPRN_SRR0 1421 ld r10,PACAKBASE(r13) 1422 LOAD_HANDLER(r10,unrecover_mce) 1423 mtspr SPRN_SRR0,r10 1424 ld r10,PACAKMSR(r13) 1425 /* 1426 * We are going down. But there are chances that we might get hit by 1427 * another MCE during panic path and we may run into unstable state 1428 * with no way out. Hence, turn ME bit off while going down, so that 1429 * when another MCE is hit during panic path, system will checkstop 1430 * and hypervisor will get restarted cleanly by SP. 1431 */ 1432 li r3,MSR_ME 1433 andc r10,r10,r3 /* Turn off MSR_ME */ 1434 mtspr SPRN_SRR1,r10 1435 rfid 1436 b . 14372: 1438 /* 1439 * Check if we have successfully handled/recovered from error, if not 1440 * then stay on emergency stack and panic. 1441 */ 1442 ld r3,RESULT(r1) /* Load result */ 1443 cmpdi r3,0 /* see if we handled MCE successfully */ 1444 1445 beq 1b /* if !handled then panic */ 1446 /* 1447 * Return from MC interrupt. 1448 * Queue up the MCE event so that we can log it later, while 1449 * returning from kernel or opal call. 1450 */ 1451 bl machine_check_queue_event 1452 MACHINE_CHECK_HANDLER_WINDUP 1453 rfid 14549: 1455 /* Deliver the machine check to host kernel in V mode. */ 1456 MACHINE_CHECK_HANDLER_WINDUP 1457 b machine_check_pSeries 1458 1459unrecover_mce: 1460 /* Invoke machine_check_exception to print MCE event and panic. */ 1461 addi r3,r1,STACK_FRAME_OVERHEAD 1462 bl machine_check_exception 1463 /* 1464 * We will not reach here. Even if we did, there is no way out. Call 1465 * unrecoverable_exception and die. 1466 */ 14671: addi r3,r1,STACK_FRAME_OVERHEAD 1468 bl unrecoverable_exception 1469 b 1b 1470/* 1471 * r13 points to the PACA, r9 contains the saved CR, 1472 * r12 contain the saved SRR1, SRR0 is still ready for return 1473 * r3 has the faulting address 1474 * r9 - r13 are saved in paca->exslb. 1475 * r3 is saved in paca->slb_r3 1476 * We assume we aren't going to take any exceptions during this procedure. 1477 */ 1478slb_miss_realmode: 1479 mflr r10 1480#ifdef CONFIG_RELOCATABLE 1481 mtctr r11 1482#endif 1483 1484 stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */ 1485 std r10,PACA_EXSLB+EX_LR(r13) /* save LR */ 1486 1487 bl slb_allocate_realmode 1488 1489 /* All done -- return from exception. */ 1490 1491 ld r10,PACA_EXSLB+EX_LR(r13) 1492 ld r3,PACA_EXSLB+EX_R3(r13) 1493 lwz r9,PACA_EXSLB+EX_CCR(r13) /* get saved CR */ 1494 1495 mtlr r10 1496 1497 andi. r10,r12,MSR_RI /* check for unrecoverable exception */ 1498 beq- 2f 1499 1500.machine push 1501.machine "power4" 1502 mtcrf 0x80,r9 1503 mtcrf 0x01,r9 /* slb_allocate uses cr0 and cr7 */ 1504.machine pop 1505 1506 RESTORE_PPR_PACA(PACA_EXSLB, r9) 1507 ld r9,PACA_EXSLB+EX_R9(r13) 1508 ld r10,PACA_EXSLB+EX_R10(r13) 1509 ld r11,PACA_EXSLB+EX_R11(r13) 1510 ld r12,PACA_EXSLB+EX_R12(r13) 1511 ld r13,PACA_EXSLB+EX_R13(r13) 1512 rfid 1513 b . /* prevent speculative execution */ 1514 15152: mfspr r11,SPRN_SRR0 1516 ld r10,PACAKBASE(r13) 1517 LOAD_HANDLER(r10,unrecov_slb) 1518 mtspr SPRN_SRR0,r10 1519 ld r10,PACAKMSR(r13) 1520 mtspr SPRN_SRR1,r10 1521 rfid 1522 b . 1523 1524unrecov_slb: 1525 EXCEPTION_PROLOG_COMMON(0x4100, PACA_EXSLB) 1526 RECONCILE_IRQ_STATE(r10, r11) 1527 bl save_nvgprs 15281: addi r3,r1,STACK_FRAME_OVERHEAD 1529 bl unrecoverable_exception 1530 b 1b 1531 1532 1533#ifdef CONFIG_PPC_970_NAP 1534power4_fixup_nap: 1535 andc r9,r9,r10 1536 std r9,TI_LOCAL_FLAGS(r11) 1537 ld r10,_LINK(r1) /* make idle task do the */ 1538 std r10,_NIP(r1) /* equivalent of a blr */ 1539 blr 1540#endif 1541 1542/* 1543 * Hash table stuff 1544 */ 1545 .align 7 1546do_hash_page: 1547 std r3,_DAR(r1) 1548 std r4,_DSISR(r1) 1549 1550 andis. r0,r4,0xa410 /* weird error? */ 1551 bne- handle_page_fault /* if not, try to insert a HPTE */ 1552 andis. r0,r4,DSISR_DABRMATCH@h 1553 bne- handle_dabr_fault 1554 CURRENT_THREAD_INFO(r11, r1) 1555 lwz r0,TI_PREEMPT(r11) /* If we're in an "NMI" */ 1556 andis. r0,r0,NMI_MASK@h /* (i.e. an irq when soft-disabled) */ 1557 bne 77f /* then don't call hash_page now */ 1558 /* 1559 * We need to set the _PAGE_USER bit if MSR_PR is set or if we are 1560 * accessing a userspace segment (even from the kernel). We assume 1561 * kernel addresses always have the high bit set. 1562 */ 1563 rlwinm r4,r4,32-25+9,31-9,31-9 /* DSISR_STORE -> _PAGE_RW */ 1564 rotldi r0,r3,15 /* Move high bit into MSR_PR posn */ 1565 orc r0,r12,r0 /* MSR_PR | ~high_bit */ 1566 rlwimi r4,r0,32-13,30,30 /* becomes _PAGE_USER access bit */ 1567 ori r4,r4,1 /* add _PAGE_PRESENT */ 1568 rlwimi r4,r5,22+2,31-2,31-2 /* Set _PAGE_EXEC if trap is 0x400 */ 1569 1570 /* 1571 * r3 contains the faulting address 1572 * r4 contains the required access permissions 1573 * r5 contains the trap number 1574 * 1575 * at return r3 = 0 for success, 1 for page fault, negative for error 1576 */ 1577 bl hash_page /* build HPTE if possible */ 1578 cmpdi r3,0 /* see if hash_page succeeded */ 1579 1580 /* Success */ 1581 beq fast_exc_return_irq /* Return from exception on success */ 1582 1583 /* Error */ 1584 blt- 13f 1585 1586/* Here we have a page fault that hash_page can't handle. */ 1587handle_page_fault: 158811: ld r4,_DAR(r1) 1589 ld r5,_DSISR(r1) 1590 addi r3,r1,STACK_FRAME_OVERHEAD 1591 bl do_page_fault 1592 cmpdi r3,0 1593 beq+ 12f 1594 bl save_nvgprs 1595 mr r5,r3 1596 addi r3,r1,STACK_FRAME_OVERHEAD 1597 lwz r4,_DAR(r1) 1598 bl bad_page_fault 1599 b ret_from_except 1600 1601/* We have a data breakpoint exception - handle it */ 1602handle_dabr_fault: 1603 bl save_nvgprs 1604 ld r4,_DAR(r1) 1605 ld r5,_DSISR(r1) 1606 addi r3,r1,STACK_FRAME_OVERHEAD 1607 bl do_break 160812: b ret_from_except_lite 1609 1610 1611/* We have a page fault that hash_page could handle but HV refused 1612 * the PTE insertion 1613 */ 161413: bl save_nvgprs 1615 mr r5,r3 1616 addi r3,r1,STACK_FRAME_OVERHEAD 1617 ld r4,_DAR(r1) 1618 bl low_hash_fault 1619 b ret_from_except 1620 1621/* 1622 * We come here as a result of a DSI at a point where we don't want 1623 * to call hash_page, such as when we are accessing memory (possibly 1624 * user memory) inside a PMU interrupt that occurred while interrupts 1625 * were soft-disabled. We want to invoke the exception handler for 1626 * the access, or panic if there isn't a handler. 1627 */ 162877: bl save_nvgprs 1629 mr r4,r3 1630 addi r3,r1,STACK_FRAME_OVERHEAD 1631 li r5,SIGSEGV 1632 bl bad_page_fault 1633 b ret_from_except 1634 1635/* 1636 * Here we have detected that the kernel stack pointer is bad. 1637 * R9 contains the saved CR, r13 points to the paca, 1638 * r10 contains the (bad) kernel stack pointer, 1639 * r11 and r12 contain the saved SRR0 and SRR1. 1640 * We switch to using an emergency stack, save the registers there, 1641 * and call kernel_bad_stack(), which panics. 1642 */ 1643bad_stack: 1644 ld r1,PACAEMERGSP(r13) 1645 subi r1,r1,64+INT_FRAME_SIZE 1646 std r9,_CCR(r1) 1647 std r10,GPR1(r1) 1648 std r11,_NIP(r1) 1649 std r12,_MSR(r1) 1650 mfspr r11,SPRN_DAR 1651 mfspr r12,SPRN_DSISR 1652 std r11,_DAR(r1) 1653 std r12,_DSISR(r1) 1654 mflr r10 1655 mfctr r11 1656 mfxer r12 1657 std r10,_LINK(r1) 1658 std r11,_CTR(r1) 1659 std r12,_XER(r1) 1660 SAVE_GPR(0,r1) 1661 SAVE_GPR(2,r1) 1662 ld r10,EX_R3(r3) 1663 std r10,GPR3(r1) 1664 SAVE_GPR(4,r1) 1665 SAVE_4GPRS(5,r1) 1666 ld r9,EX_R9(r3) 1667 ld r10,EX_R10(r3) 1668 SAVE_2GPRS(9,r1) 1669 ld r9,EX_R11(r3) 1670 ld r10,EX_R12(r3) 1671 ld r11,EX_R13(r3) 1672 std r9,GPR11(r1) 1673 std r10,GPR12(r1) 1674 std r11,GPR13(r1) 1675BEGIN_FTR_SECTION 1676 ld r10,EX_CFAR(r3) 1677 std r10,ORIG_GPR3(r1) 1678END_FTR_SECTION_IFSET(CPU_FTR_CFAR) 1679 SAVE_8GPRS(14,r1) 1680 SAVE_10GPRS(22,r1) 1681 lhz r12,PACA_TRAP_SAVE(r13) 1682 std r12,_TRAP(r1) 1683 addi r11,r1,INT_FRAME_SIZE 1684 std r11,0(r1) 1685 li r12,0 1686 std r12,0(r11) 1687 ld r2,PACATOC(r13) 1688 ld r11,exception_marker@toc(r2) 1689 std r12,RESULT(r1) 1690 std r11,STACK_FRAME_OVERHEAD-16(r1) 16911: addi r3,r1,STACK_FRAME_OVERHEAD 1692 bl kernel_bad_stack 1693 b 1b 1694