| exceptions-64s.S (e4ed2b5370a2df2b1feeb970904d2f7761c241c9) | exceptions-64s.S (ba41e1e1ccb9771ce41a3b8e2121f95486e76ac9) |
|---|---|
| 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. --- 218 unchanged lines hidden (view full) --- 227 cmpwi r10,0 /* Are we in nested machine check */ 228 bne 0f /* Yes, we are. */ 229 /* First machine check entry */ 230 ld r1,PACAMCEMERGSP(r13) /* Use MC emergency stack */ 2310: subi r1,r1,INT_FRAME_SIZE /* alloc stack frame */ 232 addi r10,r10,1 /* increment paca->in_mce */ 233 sth r10,PACA_IN_MCE(r13) 234 /* Limit nested MCE to level 4 to avoid stack overflow */ | 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. --- 218 unchanged lines hidden (view full) --- 227 cmpwi r10,0 /* Are we in nested machine check */ 228 bne 0f /* Yes, we are. */ 229 /* First machine check entry */ 230 ld r1,PACAMCEMERGSP(r13) /* Use MC emergency stack */ 2310: subi r1,r1,INT_FRAME_SIZE /* alloc stack frame */ 232 addi r10,r10,1 /* increment paca->in_mce */ 233 sth r10,PACA_IN_MCE(r13) 234 /* Limit nested MCE to level 4 to avoid stack overflow */ |
| 235 cmpwi r10,4 | 235 cmpwi r10,MAX_MCE_DEPTH |
| 236 bgt 2f /* Check if we hit limit of 4 */ 237 std r11,GPR1(r1) /* Save r1 on the stack. */ 238 std r11,0(r1) /* make stack chain pointer */ 239 mfspr r11,SPRN_SRR0 /* Save SRR0 */ 240 std r11,_NIP(r1) 241 mfspr r11,SPRN_SRR1 /* Save SRR1 */ 242 std r11,_MSR(r1) 243 mfspr r11,SPRN_DAR /* Save DAR */ --- 485 unchanged lines hidden (view full) --- 729 bl alignment_exception 730 b ret_from_except 731 732 733EXC_REAL(program_check, 0x700, 0x100) 734EXC_VIRT(program_check, 0x4700, 0x100, 0x700) 735TRAMP_KVM(PACA_EXGEN, 0x700) 736EXC_COMMON_BEGIN(program_check_common) | 236 bgt 2f /* Check if we hit limit of 4 */ 237 std r11,GPR1(r1) /* Save r1 on the stack. */ 238 std r11,0(r1) /* make stack chain pointer */ 239 mfspr r11,SPRN_SRR0 /* Save SRR0 */ 240 std r11,_NIP(r1) 241 mfspr r11,SPRN_SRR1 /* Save SRR1 */ 242 std r11,_MSR(r1) 243 mfspr r11,SPRN_DAR /* Save DAR */ --- 485 unchanged lines hidden (view full) --- 729 bl alignment_exception 730 b ret_from_except 731 732 733EXC_REAL(program_check, 0x700, 0x100) 734EXC_VIRT(program_check, 0x4700, 0x100, 0x700) 735TRAMP_KVM(PACA_EXGEN, 0x700) 736EXC_COMMON_BEGIN(program_check_common) |
| 737 /* 738 * It's possible to receive a TM Bad Thing type program check with 739 * userspace register values (in particular r1), but with SRR1 reporting 740 * that we came from the kernel. Normally that would confuse the bad 741 * stack logic, and we would report a bad kernel stack pointer. Instead 742 * we switch to the emergency stack if we're taking a TM Bad Thing from 743 * the kernel. 744 */ 745 li r10,MSR_PR /* Build a mask of MSR_PR .. */ 746 oris r10,r10,0x200000@h /* .. and SRR1_PROGTM */ 747 and r10,r10,r12 /* Mask SRR1 with that. */ 748 srdi r10,r10,8 /* Shift it so we can compare */ 749 cmpldi r10,(0x200000 >> 8) /* .. with an immediate. */ 750 bne 1f /* If != go to normal path. */ 751 752 /* SRR1 had PR=0 and SRR1_PROGTM=1, so use the emergency stack */ 753 andi. r10,r12,MSR_PR; /* Set CR0 correctly for label */ 754 /* 3 in EXCEPTION_PROLOG_COMMON */ 755 mr r10,r1 /* Save r1 */ 756 ld r1,PACAEMERGSP(r13) /* Use emergency stack */ 757 subi r1,r1,INT_FRAME_SIZE /* alloc stack frame */ 758 b 3f /* Jump into the macro !! */ 7591: EXCEPTION_PROLOG_COMMON(0x700, PACA_EXGEN) | 737 EXCEPTION_PROLOG_COMMON(0x700, PACA_EXGEN) |
| 760 bl save_nvgprs 761 RECONCILE_IRQ_STATE(r10, r11) 762 addi r3,r1,STACK_FRAME_OVERHEAD 763 bl program_check_exception 764 b ret_from_except 765 766 767EXC_REAL(fp_unavailable, 0x800, 0x100) --- 259 unchanged lines hidden (view full) --- 1027 subi r1,r1,INT_FRAME_SIZE /* alloc stack frame */ 1028 mfspr r11,SPRN_HSRR0 /* Save HSRR0 */ 1029 mfspr r12,SPRN_HSRR1 /* Save HSRR1 */ 1030 EXCEPTION_PROLOG_COMMON_1() 1031 EXCEPTION_PROLOG_COMMON_2(PACA_EXGEN) 1032 EXCEPTION_PROLOG_COMMON_3(0xe60) 1033 addi r3,r1,STACK_FRAME_OVERHEAD 1034 BRANCH_LINK_TO_FAR(hmi_exception_realmode) /* Function call ABI */ | 738 bl save_nvgprs 739 RECONCILE_IRQ_STATE(r10, r11) 740 addi r3,r1,STACK_FRAME_OVERHEAD 741 bl program_check_exception 742 b ret_from_except 743 744 745EXC_REAL(fp_unavailable, 0x800, 0x100) --- 259 unchanged lines hidden (view full) --- 1005 subi r1,r1,INT_FRAME_SIZE /* alloc stack frame */ 1006 mfspr r11,SPRN_HSRR0 /* Save HSRR0 */ 1007 mfspr r12,SPRN_HSRR1 /* Save HSRR1 */ 1008 EXCEPTION_PROLOG_COMMON_1() 1009 EXCEPTION_PROLOG_COMMON_2(PACA_EXGEN) 1010 EXCEPTION_PROLOG_COMMON_3(0xe60) 1011 addi r3,r1,STACK_FRAME_OVERHEAD 1012 BRANCH_LINK_TO_FAR(hmi_exception_realmode) /* Function call ABI */ |
| 1013 cmpdi cr0,r3,0 1014 |
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| 1035 /* Windup the stack. */ 1036 /* Move original HSRR0 and HSRR1 into the respective regs */ 1037 ld r9,_MSR(r1) 1038 mtspr SPRN_HSRR1,r9 1039 ld r3,_NIP(r1) 1040 mtspr SPRN_HSRR0,r3 1041 ld r9,_CTR(r1) 1042 mtctr r9 1043 ld r9,_XER(r1) 1044 mtxer r9 1045 ld r9,_LINK(r1) 1046 mtlr r9 1047 REST_GPR(0, r1) 1048 REST_8GPRS(2, r1) 1049 REST_GPR(10, r1) 1050 ld r11,_CCR(r1) | 1015 /* Windup the stack. */ 1016 /* Move original HSRR0 and HSRR1 into the respective regs */ 1017 ld r9,_MSR(r1) 1018 mtspr SPRN_HSRR1,r9 1019 ld r3,_NIP(r1) 1020 mtspr SPRN_HSRR0,r3 1021 ld r9,_CTR(r1) 1022 mtctr r9 1023 ld r9,_XER(r1) 1024 mtxer r9 1025 ld r9,_LINK(r1) 1026 mtlr r9 1027 REST_GPR(0, r1) 1028 REST_8GPRS(2, r1) 1029 REST_GPR(10, r1) 1030 ld r11,_CCR(r1) |
| 1031 REST_2GPRS(12, r1) 1032 bne 1f |
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| 1051 mtcr r11 1052 REST_GPR(11, r1) | 1033 mtcr r11 1034 REST_GPR(11, r1) |
| 1053 REST_2GPRS(12, r1) 1054 /* restore original r1. */ | |
| 1055 ld r1,GPR1(r1) | 1035 ld r1,GPR1(r1) |
| 1036 hrfid |
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| 1056 | 1037 |
| 10381: mtcr r11 1039 REST_GPR(11, r1) 1040 ld r1,GPR1(r1) 1041 |
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| 1057 /* 1058 * Go to virtual mode and pull the HMI event information from 1059 * firmware. 1060 */ 1061 .globl hmi_exception_after_realmode 1062hmi_exception_after_realmode: 1063 SET_SCRATCH0(r13) 1064 EXCEPTION_PROLOG_0(PACA_EXGEN) 1065 b tramp_real_hmi_exception 1066 | 1042 /* 1043 * Go to virtual mode and pull the HMI event information from 1044 * firmware. 1045 */ 1046 .globl hmi_exception_after_realmode 1047hmi_exception_after_realmode: 1048 SET_SCRATCH0(r13) 1049 EXCEPTION_PROLOG_0(PACA_EXGEN) 1050 b tramp_real_hmi_exception 1051 |
| 1067EXC_COMMON_ASYNC(hmi_exception_common, 0xe60, handle_hmi_exception) | 1052EXC_COMMON_BEGIN(hmi_exception_common) 1053EXCEPTION_COMMON(PACA_EXGEN, 0xe60, hmi_exception_common, handle_hmi_exception, 1054 ret_from_except, FINISH_NAP;ADD_NVGPRS;ADD_RECONCILE;RUNLATCH_ON) |
| 1068 | 1055 |
| 1069 | |
| 1070EXC_REAL_OOL_MASKABLE_HV(h_doorbell, 0xe80, 0x20) 1071EXC_VIRT_OOL_MASKABLE_HV(h_doorbell, 0x4e80, 0x20, 0xe80) 1072TRAMP_KVM_HV(PACA_EXGEN, 0xe80) 1073#ifdef CONFIG_PPC_DOORBELL 1074EXC_COMMON_ASYNC(h_doorbell_common, 0xe80, doorbell_exception) 1075#else 1076EXC_COMMON_ASYNC(h_doorbell_common, 0xe80, unknown_exception) 1077#endif --- 639 unchanged lines hidden --- | 1056EXC_REAL_OOL_MASKABLE_HV(h_doorbell, 0xe80, 0x20) 1057EXC_VIRT_OOL_MASKABLE_HV(h_doorbell, 0x4e80, 0x20, 0xe80) 1058TRAMP_KVM_HV(PACA_EXGEN, 0xe80) 1059#ifdef CONFIG_PPC_DOORBELL 1060EXC_COMMON_ASYNC(h_doorbell_common, 0xe80, doorbell_exception) 1061#else 1062EXC_COMMON_ASYNC(h_doorbell_common, 0xe80, unknown_exception) 1063#endif --- 639 unchanged lines hidden --- |