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.
7 * This file is meant to be #included from head_64.S due to
8 * position dependent assembly.
10 * Most of this originates from head_64.S and thus has the same
15 #include <asm/hw_irq.h>
16 #include <asm/exception-64s.h>
17 #include <asm/ptrace.h>
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
30 /* Syscall routine is used twice, in reloc-off and reloc-on paths */
31 #define SYSCALL_PSERIES_1 \
35 END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE) \
38 mfspr r11,SPRN_SRR0 ; \
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 ; \
49 b . ; /* prevent speculative execution */
51 #define SYSCALL_PSERIES_3 \
52 /* Fast LE/BE switch system call */ \
53 1: mfspr r12,SPRN_SRR1 ; \
54 xori r12,r12,MSR_LE ; \
55 mtspr SPRN_SRR1,r12 ; \
56 rfid ; /* return to userspace */ \
58 2: mfspr r12,SPRN_SRR1 ; \
59 andi. r12,r12,MSR_PR ; \
61 mtspr SPRN_SRR0,r3 ; \
62 mtspr SPRN_SRR1,r4 ; \
63 mtspr SPRN_SDR1,r5 ; \
65 b . ; /* prevent speculative execution */
67 #if defined(CONFIG_RELOCATABLE)
69 * We can't branch directly; in the direct case we use LR
70 * and system_call_entry restores LR. (We thus need to move
71 * LR to r10 in the RFID case too.)
73 #define SYSCALL_PSERIES_2_DIRECT \
75 ld r12,PACAKBASE(r13) ; \
76 LOAD_HANDLER(r12, system_call_entry_direct) ; \
78 mfspr r12,SPRN_SRR1 ; \
79 /* Re-use of r13... No spare regs to do this */ \
82 GET_PACA(r13) ; /* get r13 back */ \
85 /* We can branch directly */
86 #define SYSCALL_PSERIES_2_DIRECT \
87 mfspr r12,SPRN_SRR1 ; \
89 mtmsrd r10,1 ; /* Set RI (EE=0) */ \
90 b system_call_entry_direct ;
94 * This is the start of the interrupt handlers for pSeries
95 * This code runs with relocation off.
96 * Code from here to __end_interrupts gets copied down to real
97 * address 0x100 when we are running a relocatable kernel.
98 * Therefore any relative branches in this section must only
99 * branch to labels in this section.
102 .globl __start_interrupts
105 .globl system_reset_pSeries;
106 system_reset_pSeries:
107 HMT_MEDIUM_PPR_DISCARD
109 #ifdef CONFIG_PPC_P7_NAP
111 /* Running native on arch 2.06 or later, check if we are
112 * waking up from nap. We only handle no state loss and
113 * supervisor state loss. We do -not- handle hypervisor
114 * state loss at this time.
117 rlwinm. r13,r13,47-31,30,31
120 /* waking up from powersave (nap) state */
122 /* Total loss of HV state is fatal, we could try to use the
123 * PIR to locate a PACA, then use an emergency stack etc...
124 * but for now, let's just stay stuck here
129 #ifdef CONFIG_KVM_BOOK3S_64_HV
130 li r0,KVM_HWTHREAD_IN_KERNEL
131 stb r0,HSTATE_HWTHREAD_STATE(r13)
132 /* Order setting hwthread_state vs. testing hwthread_req */
134 lbz r0,HSTATE_HWTHREAD_REQ(r13)
142 b .power7_wakeup_noloss
143 2: b .power7_wakeup_loss
145 END_FTR_SECTION_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_206)
146 #endif /* CONFIG_PPC_P7_NAP */
147 EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common, EXC_STD,
151 machine_check_pSeries_1:
152 /* This is moved out of line as it can be patched by FW, but
153 * some code path might still want to branch into the original
156 HMT_MEDIUM_PPR_DISCARD
157 SET_SCRATCH0(r13) /* save r13 */
158 EXCEPTION_PROLOG_0(PACA_EXMC)
159 b machine_check_pSeries_0
162 .globl data_access_pSeries
164 HMT_MEDIUM_PPR_DISCARD
167 b data_access_check_stab
168 data_access_not_stab:
169 END_MMU_FTR_SECTION_IFCLR(MMU_FTR_SLB)
170 EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, data_access_common, EXC_STD,
174 .globl data_access_slb_pSeries
175 data_access_slb_pSeries:
176 HMT_MEDIUM_PPR_DISCARD
178 EXCEPTION_PROLOG_0(PACA_EXSLB)
179 EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST, 0x380)
180 std r3,PACA_EXSLB+EX_R3(r13)
183 /* Keep that around for when we re-implement dynamic VSIDs */
185 bge slb_miss_user_pseries
186 #endif /* __DISABLED__ */
188 #ifndef CONFIG_RELOCATABLE
192 * We can't just use a direct branch to .slb_miss_realmode
193 * because the distance from here to there depends on where
194 * the kernel ends up being put.
197 ld r10,PACAKBASE(r13)
198 LOAD_HANDLER(r10, .slb_miss_realmode)
203 STD_EXCEPTION_PSERIES(0x400, 0x400, instruction_access)
206 .globl instruction_access_slb_pSeries
207 instruction_access_slb_pSeries:
208 HMT_MEDIUM_PPR_DISCARD
210 EXCEPTION_PROLOG_0(PACA_EXSLB)
211 EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST_PR, 0x480)
212 std r3,PACA_EXSLB+EX_R3(r13)
213 mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */
215 /* Keep that around for when we re-implement dynamic VSIDs */
217 bge slb_miss_user_pseries
218 #endif /* __DISABLED__ */
220 #ifndef CONFIG_RELOCATABLE
224 ld r10,PACAKBASE(r13)
225 LOAD_HANDLER(r10, .slb_miss_realmode)
230 /* We open code these as we can't have a ". = x" (even with
231 * x = "." within a feature section
234 .globl hardware_interrupt_pSeries;
235 .globl hardware_interrupt_hv;
236 hardware_interrupt_pSeries:
237 hardware_interrupt_hv:
238 HMT_MEDIUM_PPR_DISCARD
240 _MASKABLE_EXCEPTION_PSERIES(0x502, hardware_interrupt,
241 EXC_HV, SOFTEN_TEST_HV)
242 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0x502)
244 _MASKABLE_EXCEPTION_PSERIES(0x500, hardware_interrupt,
245 EXC_STD, SOFTEN_TEST_HV_201)
246 KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x500)
247 ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_206)
249 STD_EXCEPTION_PSERIES(0x600, 0x600, alignment)
250 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x600)
252 STD_EXCEPTION_PSERIES(0x700, 0x700, program_check)
253 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x700)
255 STD_EXCEPTION_PSERIES(0x800, 0x800, fp_unavailable)
256 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x800)
259 .globl decrementer_pSeries
261 _MASKABLE_EXCEPTION_PSERIES(0x900, decrementer, EXC_STD, SOFTEN_TEST_PR)
263 STD_EXCEPTION_HV(0x980, 0x982, hdecrementer)
265 MASKABLE_EXCEPTION_PSERIES(0xa00, 0xa00, doorbell_super)
266 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xa00)
268 STD_EXCEPTION_PSERIES(0xb00, 0xb00, trap_0b)
269 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xb00)
272 .globl system_call_pSeries
275 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
278 std r9,PACA_EXGEN+EX_R9(r13)
279 std r10,PACA_EXGEN+EX_R10(r13)
285 SYSCALL_PSERIES_2_RFID
287 KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xc00)
289 STD_EXCEPTION_PSERIES(0xd00, 0xd00, single_step)
290 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xd00)
292 /* At 0xe??? we have a bunch of hypervisor exceptions, we branch
293 * out of line to handle them
296 hv_exception_trampoline:
298 EXCEPTION_PROLOG_0(PACA_EXGEN)
303 EXCEPTION_PROLOG_0(PACA_EXGEN)
308 EXCEPTION_PROLOG_0(PACA_EXGEN)
309 b emulation_assist_hv
313 EXCEPTION_PROLOG_0(PACA_EXGEN)
318 EXCEPTION_PROLOG_0(PACA_EXGEN)
321 /* We need to deal with the Altivec unavailable exception
322 * here which is at 0xf20, thus in the middle of the
323 * prolog code of the PerformanceMonitor one. A little
324 * trickery is thus necessary
326 performance_monitor_pSeries_1:
329 EXCEPTION_PROLOG_0(PACA_EXGEN)
330 b performance_monitor_pSeries
332 altivec_unavailable_pSeries_1:
335 EXCEPTION_PROLOG_0(PACA_EXGEN)
336 b altivec_unavailable_pSeries
338 vsx_unavailable_pSeries_1:
341 EXCEPTION_PROLOG_0(PACA_EXGEN)
342 b vsx_unavailable_pSeries
346 EXCEPTION_PROLOG_0(PACA_EXGEN)
347 b tm_unavailable_pSeries
349 #ifdef CONFIG_CBE_RAS
350 STD_EXCEPTION_HV(0x1200, 0x1202, cbe_system_error)
351 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1202)
352 #endif /* CONFIG_CBE_RAS */
354 STD_EXCEPTION_PSERIES(0x1300, 0x1300, instruction_breakpoint)
355 KVM_HANDLER_PR_SKIP(PACA_EXGEN, EXC_STD, 0x1300)
358 .global denorm_exception_hv
360 HMT_MEDIUM_PPR_DISCARD
361 mtspr SPRN_SPRG_HSCRATCH0,r13
362 EXCEPTION_PROLOG_0(PACA_EXGEN)
363 std r11,PACA_EXGEN+EX_R11(r13)
364 std r12,PACA_EXGEN+EX_R12(r13)
365 mfspr r9,SPRN_SPRG_HSCRATCH0
366 std r9,PACA_EXGEN+EX_R13(r13)
369 #ifdef CONFIG_PPC_DENORMALISATION
371 mfspr r11,SPRN_HSRR0 /* save HSRR0 */
372 andis. r10,r10,(HSRR1_DENORM)@h /* denorm? */
373 addi r11,r11,-4 /* HSRR0 is next instruction */
377 EXCEPTION_PROLOG_PSERIES_1(denorm_common, EXC_HV)
378 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x1500)
380 #ifdef CONFIG_CBE_RAS
381 STD_EXCEPTION_HV(0x1600, 0x1602, cbe_maintenance)
382 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1602)
383 #endif /* CONFIG_CBE_RAS */
385 STD_EXCEPTION_PSERIES(0x1700, 0x1700, altivec_assist)
386 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x1700)
388 #ifdef CONFIG_CBE_RAS
389 STD_EXCEPTION_HV(0x1800, 0x1802, cbe_thermal)
390 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1802)
393 #endif /* CONFIG_CBE_RAS */
396 /*** Out of line interrupts support ***/
399 /* moved from 0x200 */
400 machine_check_pSeries:
401 .globl machine_check_fwnmi
403 HMT_MEDIUM_PPR_DISCARD
404 SET_SCRATCH0(r13) /* save r13 */
405 EXCEPTION_PROLOG_0(PACA_EXMC)
406 machine_check_pSeries_0:
407 EXCEPTION_PROLOG_1(PACA_EXMC, KVMTEST, 0x200)
408 EXCEPTION_PROLOG_PSERIES_1(machine_check_common, EXC_STD)
409 KVM_HANDLER_SKIP(PACA_EXMC, EXC_STD, 0x200)
411 /* moved from 0x300 */
412 data_access_check_stab:
414 std r9,PACA_EXSLB+EX_R9(r13)
415 std r10,PACA_EXSLB+EX_R10(r13)
419 rlwimi r10,r9,16,0x20
420 #ifdef CONFIG_KVM_BOOK3S_PR
421 lbz r9,HSTATE_IN_GUEST(r13)
422 rlwimi r10,r9,8,0x300
426 beq do_stab_bolted_pSeries
428 ld r9,PACA_EXSLB+EX_R9(r13)
429 ld r10,PACA_EXSLB+EX_R10(r13)
430 b data_access_not_stab
431 do_stab_bolted_pSeries:
432 std r11,PACA_EXSLB+EX_R11(r13)
433 std r12,PACA_EXSLB+EX_R12(r13)
435 std r10,PACA_EXSLB+EX_R13(r13)
436 EXCEPTION_PROLOG_PSERIES_1(.do_stab_bolted, EXC_STD)
438 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x300)
439 KVM_HANDLER_SKIP(PACA_EXSLB, EXC_STD, 0x380)
440 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x400)
441 KVM_HANDLER_PR(PACA_EXSLB, EXC_STD, 0x480)
442 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x900)
443 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0x982)
445 #ifdef CONFIG_PPC_DENORMALISATION
449 * To denormalise we need to move a copy of the register to itself.
450 * For POWER6 do that here for all FP regs.
453 ori r10,r10,(MSR_FP|MSR_FE0|MSR_FE1)
454 xori r10,r10,(MSR_FE0|MSR_FE1)
458 #define FMR2(n) fmr (n), (n) ; fmr n+1, n+1
459 #define FMR4(n) FMR2(n) ; FMR2(n+2)
460 #define FMR8(n) FMR4(n) ; FMR4(n+4)
461 #define FMR16(n) FMR8(n) ; FMR8(n+8)
462 #define FMR32(n) FMR16(n) ; FMR16(n+16)
467 * To denormalise we need to move a copy of the register to itself.
468 * For POWER7 do that here for the first 32 VSX registers only.
471 oris r10,r10,MSR_VSX@h
475 #define XVCPSGNDP2(n) XVCPSGNDP(n,n,n) ; XVCPSGNDP(n+1,n+1,n+1)
476 #define XVCPSGNDP4(n) XVCPSGNDP2(n) ; XVCPSGNDP2(n+2)
477 #define XVCPSGNDP8(n) XVCPSGNDP4(n) ; XVCPSGNDP4(n+4)
478 #define XVCPSGNDP16(n) XVCPSGNDP8(n) ; XVCPSGNDP8(n+8)
479 #define XVCPSGNDP32(n) XVCPSGNDP16(n) ; XVCPSGNDP16(n+16)
482 ALT_FTR_SECTION_END_IFCLR(CPU_FTR_ARCH_206)
486 END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S)
488 * To denormalise we need to move a copy of the register to itself.
489 * For POWER8 we need to do that for all 64 VSX registers
495 ld r9,PACA_EXGEN+EX_R9(r13)
496 RESTORE_PPR_PACA(PACA_EXGEN, r10)
497 ld r10,PACA_EXGEN+EX_R10(r13)
498 ld r11,PACA_EXGEN+EX_R11(r13)
499 ld r12,PACA_EXGEN+EX_R12(r13)
500 ld r13,PACA_EXGEN+EX_R13(r13)
506 /* moved from 0xe00 */
507 STD_EXCEPTION_HV_OOL(0xe02, h_data_storage)
508 KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0xe02)
509 STD_EXCEPTION_HV_OOL(0xe22, h_instr_storage)
510 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe22)
511 STD_EXCEPTION_HV_OOL(0xe42, emulation_assist)
512 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe42)
513 STD_EXCEPTION_HV_OOL(0xe62, hmi_exception) /* need to flush cache ? */
514 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe62)
515 MASKABLE_EXCEPTION_HV_OOL(0xe82, h_doorbell)
516 KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe82)
518 /* moved from 0xf00 */
519 STD_EXCEPTION_PSERIES_OOL(0xf00, performance_monitor)
520 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf00)
521 STD_EXCEPTION_PSERIES_OOL(0xf20, altivec_unavailable)
522 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf20)
523 STD_EXCEPTION_PSERIES_OOL(0xf40, vsx_unavailable)
524 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf40)
525 STD_EXCEPTION_PSERIES_OOL(0xf60, tm_unavailable)
526 KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf60)
529 * An interrupt came in while soft-disabled. We set paca->irq_happened, then:
530 * - If it was a decrementer interrupt, we bump the dec to max and and return.
531 * - If it was a doorbell we return immediately since doorbells are edge
532 * triggered and won't automatically refire.
533 * - else we hard disable and return.
534 * This is called with r10 containing the value to OR to the paca field.
536 #define MASKED_INTERRUPT(_H) \
537 masked_##_H##interrupt: \
538 std r11,PACA_EXGEN+EX_R11(r13); \
539 lbz r11,PACAIRQHAPPENED(r13); \
541 stb r11,PACAIRQHAPPENED(r13); \
542 cmpwi r10,PACA_IRQ_DEC; \
545 ori r10,r10,0xffff; \
546 mtspr SPRN_DEC,r10; \
548 1: cmpwi r10,PACA_IRQ_DBELL; \
550 mfspr r10,SPRN_##_H##SRR1; \
551 rldicl r10,r10,48,1; /* clear MSR_EE */ \
553 mtspr SPRN_##_H##SRR1,r10; \
555 ld r9,PACA_EXGEN+EX_R9(r13); \
556 ld r10,PACA_EXGEN+EX_R10(r13); \
557 ld r11,PACA_EXGEN+EX_R11(r13); \
566 * Called from arch_local_irq_enable when an interrupt needs
567 * to be resent. r3 contains 0x500, 0x900, 0xa00 or 0xe80 to indicate
568 * which kind of interrupt. MSR:EE is already off. We generate a
569 * stackframe like if a real interrupt had happened.
571 * Note: While MSR:EE is off, we need to make sure that _MSR
572 * in the generated frame has EE set to 1 or the exception
573 * handler will not properly re-enable them.
575 _GLOBAL(__replay_interrupt)
576 /* We are going to jump to the exception common code which
577 * will retrieve various register values from the PACA which
578 * we don't give a damn about, so we don't bother storing them.
585 beq decrementer_common
587 beq hardware_interrupt_common
590 beq h_doorbell_common
593 beq doorbell_super_common
594 ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE)
597 #ifdef CONFIG_PPC_PSERIES
599 * Vectors for the FWNMI option. Share common code.
601 .globl system_reset_fwnmi
604 HMT_MEDIUM_PPR_DISCARD
605 SET_SCRATCH0(r13) /* save r13 */
606 EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common, EXC_STD,
609 #endif /* CONFIG_PPC_PSERIES */
613 * This is used for when the SLB miss handler has to go virtual,
614 * which doesn't happen for now anymore but will once we re-implement
615 * dynamic VSIDs for shared page tables
617 slb_miss_user_pseries:
618 std r10,PACA_EXGEN+EX_R10(r13)
619 std r11,PACA_EXGEN+EX_R11(r13)
620 std r12,PACA_EXGEN+EX_R12(r13)
622 ld r11,PACA_EXSLB+EX_R9(r13)
623 ld r12,PACA_EXSLB+EX_R3(r13)
624 std r10,PACA_EXGEN+EX_R13(r13)
625 std r11,PACA_EXGEN+EX_R9(r13)
626 std r12,PACA_EXGEN+EX_R3(r13)
629 mfspr r11,SRR0 /* save SRR0 */
630 ori r12,r12,slb_miss_user_common@l /* virt addr of handler */
631 ori r10,r10,MSR_IR|MSR_DR|MSR_RI
633 mfspr r12,SRR1 /* and SRR1 */
636 b . /* prevent spec. execution */
637 #endif /* __DISABLED__ */
640 * Code from here down to __end_handlers is invoked from the
641 * exception prologs above. Because the prologs assemble the
642 * addresses of these handlers using the LOAD_HANDLER macro,
643 * which uses an ori instruction, these handlers must be in
644 * the first 64k of the kernel image.
647 /*** Common interrupt handlers ***/
649 STD_EXCEPTION_COMMON(0x100, system_reset, .system_reset_exception)
652 * Machine check is different because we use a different
653 * save area: PACA_EXMC instead of PACA_EXGEN.
656 .globl machine_check_common
657 machine_check_common:
660 std r10,PACA_EXGEN+EX_DAR(r13)
662 stw r10,PACA_EXGEN+EX_DSISR(r13)
663 EXCEPTION_PROLOG_COMMON(0x200, PACA_EXMC)
666 ld r3,PACA_EXGEN+EX_DAR(r13)
667 lwz r4,PACA_EXGEN+EX_DSISR(r13)
671 addi r3,r1,STACK_FRAME_OVERHEAD
672 bl .machine_check_exception
675 STD_EXCEPTION_COMMON_ASYNC(0x500, hardware_interrupt, do_IRQ)
676 STD_EXCEPTION_COMMON_ASYNC(0x900, decrementer, .timer_interrupt)
677 STD_EXCEPTION_COMMON(0x980, hdecrementer, .hdec_interrupt)
678 #ifdef CONFIG_PPC_DOORBELL
679 STD_EXCEPTION_COMMON_ASYNC(0xa00, doorbell_super, .doorbell_exception)
681 STD_EXCEPTION_COMMON_ASYNC(0xa00, doorbell_super, .unknown_exception)
683 STD_EXCEPTION_COMMON(0xb00, trap_0b, .unknown_exception)
684 STD_EXCEPTION_COMMON(0xd00, single_step, .single_step_exception)
685 STD_EXCEPTION_COMMON(0xe00, trap_0e, .unknown_exception)
686 STD_EXCEPTION_COMMON(0xe40, emulation_assist, .program_check_exception)
687 STD_EXCEPTION_COMMON(0xe60, hmi_exception, .unknown_exception)
688 #ifdef CONFIG_PPC_DOORBELL
689 STD_EXCEPTION_COMMON_ASYNC(0xe80, h_doorbell, .doorbell_exception)
691 STD_EXCEPTION_COMMON_ASYNC(0xe80, h_doorbell, .unknown_exception)
693 STD_EXCEPTION_COMMON_ASYNC(0xf00, performance_monitor, .performance_monitor_exception)
694 STD_EXCEPTION_COMMON(0x1300, instruction_breakpoint, .instruction_breakpoint_exception)
695 STD_EXCEPTION_COMMON(0x1502, denorm, .unknown_exception)
696 #ifdef CONFIG_ALTIVEC
697 STD_EXCEPTION_COMMON(0x1700, altivec_assist, .altivec_assist_exception)
699 STD_EXCEPTION_COMMON(0x1700, altivec_assist, .unknown_exception)
701 #ifdef CONFIG_CBE_RAS
702 STD_EXCEPTION_COMMON(0x1200, cbe_system_error, .cbe_system_error_exception)
703 STD_EXCEPTION_COMMON(0x1600, cbe_maintenance, .cbe_maintenance_exception)
704 STD_EXCEPTION_COMMON(0x1800, cbe_thermal, .cbe_thermal_exception)
705 #endif /* CONFIG_CBE_RAS */
708 * Relocation-on interrupts: A subset of the interrupts can be delivered
709 * with IR=1/DR=1, if AIL==2 and MSR.HV won't be changed by delivering
710 * it. Addresses are the same as the original interrupt addresses, but
711 * offset by 0xc000000000004000.
712 * It's impossible to receive interrupts below 0x300 via this mechanism.
713 * KVM: None of these traps are from the guest ; anything that escalated
714 * to HV=1 from HV=0 is delivered via real mode handlers.
718 * This uses the standard macro, since the original 0x300 vector
719 * only has extra guff for STAB-based processors -- which never
722 STD_RELON_EXCEPTION_PSERIES(0x4300, 0x300, data_access)
724 .globl data_access_slb_relon_pSeries
725 data_access_slb_relon_pSeries:
727 EXCEPTION_PROLOG_0(PACA_EXSLB)
728 EXCEPTION_PROLOG_1(PACA_EXSLB, NOTEST, 0x380)
729 std r3,PACA_EXSLB+EX_R3(r13)
732 #ifndef CONFIG_RELOCATABLE
736 * We can't just use a direct branch to .slb_miss_realmode
737 * because the distance from here to there depends on where
738 * the kernel ends up being put.
741 ld r10,PACAKBASE(r13)
742 LOAD_HANDLER(r10, .slb_miss_realmode)
747 STD_RELON_EXCEPTION_PSERIES(0x4400, 0x400, instruction_access)
749 .globl instruction_access_slb_relon_pSeries
750 instruction_access_slb_relon_pSeries:
752 EXCEPTION_PROLOG_0(PACA_EXSLB)
753 EXCEPTION_PROLOG_1(PACA_EXSLB, NOTEST, 0x480)
754 std r3,PACA_EXSLB+EX_R3(r13)
755 mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */
757 #ifndef CONFIG_RELOCATABLE
761 ld r10,PACAKBASE(r13)
762 LOAD_HANDLER(r10, .slb_miss_realmode)
768 .globl hardware_interrupt_relon_pSeries;
769 .globl hardware_interrupt_relon_hv;
770 hardware_interrupt_relon_pSeries:
771 hardware_interrupt_relon_hv:
773 _MASKABLE_RELON_EXCEPTION_PSERIES(0x502, hardware_interrupt, EXC_HV, SOFTEN_TEST_HV)
775 _MASKABLE_RELON_EXCEPTION_PSERIES(0x500, hardware_interrupt, EXC_STD, SOFTEN_TEST_PR)
776 ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE)
777 STD_RELON_EXCEPTION_PSERIES(0x4600, 0x600, alignment)
778 STD_RELON_EXCEPTION_PSERIES(0x4700, 0x700, program_check)
779 STD_RELON_EXCEPTION_PSERIES(0x4800, 0x800, fp_unavailable)
780 MASKABLE_RELON_EXCEPTION_PSERIES(0x4900, 0x900, decrementer)
781 STD_RELON_EXCEPTION_HV(0x4980, 0x982, hdecrementer)
782 MASKABLE_RELON_EXCEPTION_PSERIES(0x4a00, 0xa00, doorbell_super)
783 STD_RELON_EXCEPTION_PSERIES(0x4b00, 0xb00, trap_0b)
786 .globl system_call_relon_pSeries
787 system_call_relon_pSeries:
790 SYSCALL_PSERIES_2_DIRECT
793 STD_RELON_EXCEPTION_PSERIES(0x4d00, 0xd00, single_step)
796 b . /* Can't happen, see v2.07 Book III-S section 6.5 */
799 b . /* Can't happen, see v2.07 Book III-S section 6.5 */
803 EXCEPTION_PROLOG_0(PACA_EXGEN)
804 b emulation_assist_relon_hv
807 b . /* Can't happen, see v2.07 Book III-S section 6.5 */
811 EXCEPTION_PROLOG_0(PACA_EXGEN)
812 b h_doorbell_relon_hv
814 performance_monitor_relon_pSeries_1:
817 EXCEPTION_PROLOG_0(PACA_EXGEN)
818 b performance_monitor_relon_pSeries
820 altivec_unavailable_relon_pSeries_1:
823 EXCEPTION_PROLOG_0(PACA_EXGEN)
824 b altivec_unavailable_relon_pSeries
826 vsx_unavailable_relon_pSeries_1:
829 EXCEPTION_PROLOG_0(PACA_EXGEN)
830 b vsx_unavailable_relon_pSeries
832 tm_unavailable_relon_pSeries_1:
835 EXCEPTION_PROLOG_0(PACA_EXGEN)
836 b tm_unavailable_relon_pSeries
838 STD_RELON_EXCEPTION_PSERIES(0x5300, 0x1300, instruction_breakpoint)
839 #ifdef CONFIG_PPC_DENORMALISATION
841 b denorm_exception_hv
843 STD_RELON_EXCEPTION_PSERIES(0x5700, 0x1700, altivec_assist)
845 /* Other future vectors */
847 .globl __end_interrupts
851 system_call_entry_direct:
852 #if defined(CONFIG_RELOCATABLE)
853 /* The first level prologue may have used LR to get here, saving
854 * orig in r10. To save hacking/ifdeffing common code, restore here.
861 ppc64_runlatch_on_trampoline:
862 b .__ppc64_runlatch_on
865 * Here we have detected that the kernel stack pointer is bad.
866 * R9 contains the saved CR, r13 points to the paca,
867 * r10 contains the (bad) kernel stack pointer,
868 * r11 and r12 contain the saved SRR0 and SRR1.
869 * We switch to using an emergency stack, save the registers there,
870 * and call kernel_bad_stack(), which panics.
873 ld r1,PACAEMERGSP(r13)
874 subi r1,r1,64+INT_FRAME_SIZE
906 std r10,ORIG_GPR3(r1)
907 END_FTR_SECTION_IFSET(CPU_FTR_CFAR)
910 lhz r12,PACA_TRAP_SAVE(r13)
912 addi r11,r1,INT_FRAME_SIZE
917 ld r11,exception_marker@toc(r2)
919 std r11,STACK_FRAME_OVERHEAD-16(r1)
920 1: addi r3,r1,STACK_FRAME_OVERHEAD
925 * Here r13 points to the paca, r9 contains the saved CR,
926 * SRR0 and SRR1 are saved in r11 and r12,
927 * r9 - r13 are saved in paca->exgen.
930 .globl data_access_common
933 std r10,PACA_EXGEN+EX_DAR(r13)
935 stw r10,PACA_EXGEN+EX_DSISR(r13)
936 EXCEPTION_PROLOG_COMMON(0x300, PACA_EXGEN)
939 ld r3,PACA_EXGEN+EX_DAR(r13)
940 lwz r4,PACA_EXGEN+EX_DSISR(r13)
942 b .do_hash_page /* Try to handle as hpte fault */
945 .globl h_data_storage_common
946 h_data_storage_common:
948 std r10,PACA_EXGEN+EX_DAR(r13)
949 mfspr r10,SPRN_HDSISR
950 stw r10,PACA_EXGEN+EX_DSISR(r13)
951 EXCEPTION_PROLOG_COMMON(0xe00, PACA_EXGEN)
954 addi r3,r1,STACK_FRAME_OVERHEAD
955 bl .unknown_exception
959 .globl instruction_access_common
960 instruction_access_common:
961 EXCEPTION_PROLOG_COMMON(0x400, PACA_EXGEN)
967 b .do_hash_page /* Try to handle as hpte fault */
969 STD_EXCEPTION_COMMON(0xe20, h_instr_storage, .unknown_exception)
972 * Here is the common SLB miss user that is used when going to virtual
973 * mode for SLB misses, that is currently not used
977 .globl slb_miss_user_common
978 slb_miss_user_common:
980 std r3,PACA_EXGEN+EX_DAR(r13)
981 stw r9,PACA_EXGEN+EX_CCR(r13)
982 std r10,PACA_EXGEN+EX_LR(r13)
983 std r11,PACA_EXGEN+EX_SRR0(r13)
984 bl .slb_allocate_user
986 ld r10,PACA_EXGEN+EX_LR(r13)
987 ld r3,PACA_EXGEN+EX_R3(r13)
988 lwz r9,PACA_EXGEN+EX_CCR(r13)
989 ld r11,PACA_EXGEN+EX_SRR0(r13)
993 andi. r10,r12,MSR_RI /* check for unrecoverable exception */
994 beq- unrecov_user_slb
1002 clrrdi r10,r10,2 /* clear RI before setting SRR0/1 */
1008 ld r9,PACA_EXGEN+EX_R9(r13)
1009 ld r10,PACA_EXGEN+EX_R10(r13)
1010 ld r11,PACA_EXGEN+EX_R11(r13)
1011 ld r12,PACA_EXGEN+EX_R12(r13)
1012 ld r13,PACA_EXGEN+EX_R13(r13)
1017 EXCEPTION_PROLOG_COMMON(0x380, PACA_EXGEN)
1018 ld r4,PACA_EXGEN+EX_DAR(r13)
1025 EXCEPTION_PROLOG_COMMON(0x4200, PACA_EXGEN)
1028 1: addi r3,r1,STACK_FRAME_OVERHEAD
1029 bl .unrecoverable_exception
1032 #endif /* __DISABLED__ */
1036 .globl alignment_common
1039 std r10,PACA_EXGEN+EX_DAR(r13)
1040 mfspr r10,SPRN_DSISR
1041 stw r10,PACA_EXGEN+EX_DSISR(r13)
1042 EXCEPTION_PROLOG_COMMON(0x600, PACA_EXGEN)
1043 ld r3,PACA_EXGEN+EX_DAR(r13)
1044 lwz r4,PACA_EXGEN+EX_DSISR(r13)
1049 addi r3,r1,STACK_FRAME_OVERHEAD
1050 bl .alignment_exception
1054 .globl program_check_common
1055 program_check_common:
1056 EXCEPTION_PROLOG_COMMON(0x700, PACA_EXGEN)
1059 addi r3,r1,STACK_FRAME_OVERHEAD
1060 bl .program_check_exception
1064 .globl fp_unavailable_common
1065 fp_unavailable_common:
1066 EXCEPTION_PROLOG_COMMON(0x800, PACA_EXGEN)
1067 bne 1f /* if from user, just load it up */
1070 addi r3,r1,STACK_FRAME_OVERHEAD
1071 bl .kernel_fp_unavailable_exception
1074 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1076 /* Test if 2 TM state bits are zero. If non-zero (ie. userspace was in
1077 * transaction), go do TM stuff
1079 rldicl. r0, r12, (64-MSR_TS_LG), (64-2)
1081 END_FTR_SECTION_IFSET(CPU_FTR_TM)
1084 b fast_exception_return
1085 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1086 2: /* User process was in a transaction */
1089 addi r3,r1,STACK_FRAME_OVERHEAD
1090 bl .fp_unavailable_tm
1094 .globl altivec_unavailable_common
1095 altivec_unavailable_common:
1096 EXCEPTION_PROLOG_COMMON(0xf20, PACA_EXGEN)
1097 #ifdef CONFIG_ALTIVEC
1100 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1101 BEGIN_FTR_SECTION_NESTED(69)
1102 /* Test if 2 TM state bits are zero. If non-zero (ie. userspace was in
1103 * transaction), go do TM stuff
1105 rldicl. r0, r12, (64-MSR_TS_LG), (64-2)
1107 END_FTR_SECTION_NESTED(CPU_FTR_TM, CPU_FTR_TM, 69)
1110 b fast_exception_return
1111 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1112 2: /* User process was in a transaction */
1115 addi r3,r1,STACK_FRAME_OVERHEAD
1116 bl .altivec_unavailable_tm
1120 END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
1124 addi r3,r1,STACK_FRAME_OVERHEAD
1125 bl .altivec_unavailable_exception
1129 .globl vsx_unavailable_common
1130 vsx_unavailable_common:
1131 EXCEPTION_PROLOG_COMMON(0xf40, PACA_EXGEN)
1135 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1136 BEGIN_FTR_SECTION_NESTED(69)
1137 /* Test if 2 TM state bits are zero. If non-zero (ie. userspace was in
1138 * transaction), go do TM stuff
1140 rldicl. r0, r12, (64-MSR_TS_LG), (64-2)
1142 END_FTR_SECTION_NESTED(CPU_FTR_TM, CPU_FTR_TM, 69)
1145 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1146 2: /* User process was in a transaction */
1149 addi r3,r1,STACK_FRAME_OVERHEAD
1150 bl .vsx_unavailable_tm
1154 END_FTR_SECTION_IFSET(CPU_FTR_VSX)
1158 addi r3,r1,STACK_FRAME_OVERHEAD
1159 bl .vsx_unavailable_exception
1163 .globl tm_unavailable_common
1164 tm_unavailable_common:
1165 EXCEPTION_PROLOG_COMMON(0xf60, PACA_EXGEN)
1168 addi r3,r1,STACK_FRAME_OVERHEAD
1169 bl .tm_unavailable_exception
1173 .globl __end_handlers
1176 /* Equivalents to the above handlers for relocation-on interrupt vectors */
1177 STD_RELON_EXCEPTION_HV_OOL(0xe40, emulation_assist)
1178 MASKABLE_RELON_EXCEPTION_HV_OOL(0xe80, h_doorbell)
1180 STD_RELON_EXCEPTION_PSERIES_OOL(0xf00, performance_monitor)
1181 STD_RELON_EXCEPTION_PSERIES_OOL(0xf20, altivec_unavailable)
1182 STD_RELON_EXCEPTION_PSERIES_OOL(0xf40, vsx_unavailable)
1183 STD_RELON_EXCEPTION_PSERIES_OOL(0xf60, tm_unavailable)
1185 #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
1187 * Data area reserved for FWNMI option.
1188 * This address (0x7000) is fixed by the RPA.
1191 .globl fwnmi_data_area
1194 /* pseries and powernv need to keep the whole page from
1195 * 0x7000 to 0x8000 free for use by the firmware
1198 #endif /* defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) */
1200 /* Space for CPU0's segment table */
1206 #ifdef CONFIG_PPC_POWERNV
1207 _GLOBAL(opal_mc_secondary_handler)
1208 HMT_MEDIUM_PPR_DISCARD
1213 std r3,PACA_OPAL_MC_EVT(r13)
1214 ld r13,OPAL_MC_SRR0(r3)
1216 ld r13,OPAL_MC_SRR1(r3)
1218 ld r3,OPAL_MC_GPR3(r3)
1220 b machine_check_pSeries
1221 #endif /* CONFIG_PPC_POWERNV */
1225 * r13 points to the PACA, r9 contains the saved CR,
1226 * r12 contain the saved SRR1, SRR0 is still ready for return
1227 * r3 has the faulting address
1228 * r9 - r13 are saved in paca->exslb.
1229 * r3 is saved in paca->slb_r3
1230 * We assume we aren't going to take any exceptions during this procedure.
1232 _GLOBAL(slb_miss_realmode)
1234 #ifdef CONFIG_RELOCATABLE
1238 stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */
1239 std r10,PACA_EXSLB+EX_LR(r13) /* save LR */
1241 bl .slb_allocate_realmode
1243 /* All done -- return from exception. */
1245 ld r10,PACA_EXSLB+EX_LR(r13)
1246 ld r3,PACA_EXSLB+EX_R3(r13)
1247 lwz r9,PACA_EXSLB+EX_CCR(r13) /* get saved CR */
1251 andi. r10,r12,MSR_RI /* check for unrecoverable exception */
1257 mtcrf 0x01,r9 /* slb_allocate uses cr0 and cr7 */
1260 RESTORE_PPR_PACA(PACA_EXSLB, r9)
1261 ld r9,PACA_EXSLB+EX_R9(r13)
1262 ld r10,PACA_EXSLB+EX_R10(r13)
1263 ld r11,PACA_EXSLB+EX_R11(r13)
1264 ld r12,PACA_EXSLB+EX_R12(r13)
1265 ld r13,PACA_EXSLB+EX_R13(r13)
1267 b . /* prevent speculative execution */
1269 2: mfspr r11,SPRN_SRR0
1270 ld r10,PACAKBASE(r13)
1271 LOAD_HANDLER(r10,unrecov_slb)
1273 ld r10,PACAKMSR(r13)
1279 EXCEPTION_PROLOG_COMMON(0x4100, PACA_EXSLB)
1282 1: addi r3,r1,STACK_FRAME_OVERHEAD
1283 bl .unrecoverable_exception
1287 #ifdef CONFIG_PPC_970_NAP
1290 std r9,TI_LOCAL_FLAGS(r11)
1291 ld r10,_LINK(r1) /* make idle task do the */
1292 std r10,_NIP(r1) /* equivalent of a blr */
1300 _STATIC(do_hash_page)
1304 andis. r0,r4,0xa410 /* weird error? */
1305 bne- handle_page_fault /* if not, try to insert a HPTE */
1306 andis. r0,r4,DSISR_DABRMATCH@h
1307 bne- handle_dabr_fault
1310 andis. r0,r4,0x0020 /* Is it a segment table fault? */
1311 bne- do_ste_alloc /* If so handle it */
1312 END_MMU_FTR_SECTION_IFCLR(MMU_FTR_SLB)
1314 CURRENT_THREAD_INFO(r11, r1)
1315 lwz r0,TI_PREEMPT(r11) /* If we're in an "NMI" */
1316 andis. r0,r0,NMI_MASK@h /* (i.e. an irq when soft-disabled) */
1317 bne 77f /* then don't call hash_page now */
1319 * We need to set the _PAGE_USER bit if MSR_PR is set or if we are
1320 * accessing a userspace segment (even from the kernel). We assume
1321 * kernel addresses always have the high bit set.
1323 rlwinm r4,r4,32-25+9,31-9,31-9 /* DSISR_STORE -> _PAGE_RW */
1324 rotldi r0,r3,15 /* Move high bit into MSR_PR posn */
1325 orc r0,r12,r0 /* MSR_PR | ~high_bit */
1326 rlwimi r4,r0,32-13,30,30 /* becomes _PAGE_USER access bit */
1327 ori r4,r4,1 /* add _PAGE_PRESENT */
1328 rlwimi r4,r5,22+2,31-2,31-2 /* Set _PAGE_EXEC if trap is 0x400 */
1331 * r3 contains the faulting address
1332 * r4 contains the required access permissions
1333 * r5 contains the trap number
1335 * at return r3 = 0 for success, 1 for page fault, negative for error
1337 bl .hash_page /* build HPTE if possible */
1338 cmpdi r3,0 /* see if hash_page succeeded */
1341 beq fast_exc_return_irq /* Return from exception on success */
1346 /* Here we have a page fault that hash_page can't handle. */
1350 addi r3,r1,STACK_FRAME_OVERHEAD
1356 addi r3,r1,STACK_FRAME_OVERHEAD
1361 /* We have a data breakpoint exception - handle it */
1366 addi r3,r1,STACK_FRAME_OVERHEAD
1368 12: b .ret_from_except_lite
1371 /* We have a page fault that hash_page could handle but HV refused
1376 addi r3,r1,STACK_FRAME_OVERHEAD
1382 * We come here as a result of a DSI at a point where we don't want
1383 * to call hash_page, such as when we are accessing memory (possibly
1384 * user memory) inside a PMU interrupt that occurred while interrupts
1385 * were soft-disabled. We want to invoke the exception handler for
1386 * the access, or panic if there isn't a handler.
1390 addi r3,r1,STACK_FRAME_OVERHEAD
1395 /* here we have a segment miss */
1397 bl .ste_allocate /* try to insert stab entry */
1399 bne- handle_page_fault
1400 b fast_exception_return
1403 * r13 points to the PACA, r9 contains the saved CR,
1404 * r11 and r12 contain the saved SRR0 and SRR1.
1405 * r9 - r13 are saved in paca->exslb.
1406 * We assume we aren't going to take any exceptions during this procedure.
1407 * We assume (DAR >> 60) == 0xc.
1410 _GLOBAL(do_stab_bolted)
1411 stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */
1412 std r11,PACA_EXSLB+EX_SRR0(r13) /* save SRR0 in exc. frame */
1413 mfspr r11,SPRN_DAR /* ea */
1416 * check for bad kernel/user address
1417 * (ea & ~REGION_MASK) >= PGTABLE_RANGE
1419 rldicr. r9,r11,4,(63 - 46 - 4)
1420 li r9,0 /* VSID = 0 for bad address */
1425 * This is the kernel vsid, we take the top for context from
1426 * the range. context = (MAX_USER_CONTEXT) + ((ea >> 60) - 0xc) + 1
1427 * Here we know that (ea >> 60) == 0xc
1429 lis r9,(MAX_USER_CONTEXT + 1)@ha
1430 addi r9,r9,(MAX_USER_CONTEXT + 1)@l
1432 srdi r10,r11,SID_SHIFT
1433 rldimi r10,r9,ESID_BITS,0 /* proto vsid */
1434 ASM_VSID_SCRAMBLE(r10, r9, 256M)
1435 rldic r9,r10,12,16 /* r9 = vsid << 12 */
1438 /* Hash to the primary group */
1439 ld r10,PACASTABVIRT(r13)
1440 srdi r11,r11,SID_SHIFT
1441 rldimi r10,r11,7,52 /* r10 = first ste of the group */
1443 /* Search the primary group for a free entry */
1444 1: ld r11,0(r10) /* Test valid bit of the current ste */
1451 /* Stick for only searching the primary group for now. */
1452 /* At least for now, we use a very simple random castout scheme */
1453 /* Use the TB as a random number ; OR in 1 to avoid entry 0 */
1455 rldic r11,r11,4,57 /* r11 = (r11 << 4) & 0x70 */
1458 /* r10 currently points to an ste one past the group of interest */
1459 /* make it point to the randomly selected entry */
1461 or r10,r10,r11 /* r10 is the entry to invalidate */
1463 isync /* mark the entry invalid */
1465 rldicl r11,r11,56,1 /* clear the valid bit */
1470 clrrdi r11,r11,28 /* Get the esid part of the ste */
1473 2: std r9,8(r10) /* Store the vsid part of the ste */
1476 mfspr r11,SPRN_DAR /* Get the new esid */
1477 clrrdi r11,r11,28 /* Permits a full 32b of ESID */
1478 ori r11,r11,0x90 /* Turn on valid and kp */
1479 std r11,0(r10) /* Put new entry back into the stab */
1483 /* All done -- return from exception. */
1484 lwz r9,PACA_EXSLB+EX_CCR(r13) /* get saved CR */
1485 ld r11,PACA_EXSLB+EX_SRR0(r13) /* get saved SRR0 */
1487 andi. r10,r12,MSR_RI
1490 mtcrf 0x80,r9 /* restore CR */
1498 ld r9,PACA_EXSLB+EX_R9(r13)
1499 ld r10,PACA_EXSLB+EX_R10(r13)
1500 ld r11,PACA_EXSLB+EX_R11(r13)
1501 ld r12,PACA_EXSLB+EX_R12(r13)
1502 ld r13,PACA_EXSLB+EX_R13(r13)
1504 b . /* prevent speculative execution */