STD_EXCEPTION_COMMON(0x100, system_reset, .system_reset_exception)
- /*
- * Machine check is different because we use a different
- * save area: PACA_EXMC instead of PACA_EXGEN.
- */
- .align 7
- .globl machine_check_common
-machine_check_common:
-
- mfspr r10,SPRN_DAR
- std r10,PACA_EXGEN+EX_DAR(r13)
- mfspr r10,SPRN_DSISR
- stw r10,PACA_EXGEN+EX_DSISR(r13)
- EXCEPTION_PROLOG_COMMON(0x200, PACA_EXMC)
- FINISH_NAP
- DISABLE_INTS
- ld r3,PACA_EXGEN+EX_DAR(r13)
- lwz r4,PACA_EXGEN+EX_DSISR(r13)
- std r3,_DAR(r1)
- std r4,_DSISR(r1)
- bl .save_nvgprs
- addi r3,r1,STACK_FRAME_OVERHEAD
- bl .machine_check_exception
- b .ret_from_except
-
-#define MACHINE_CHECK_HANDLER_WINDUP \
- /* Clear MSR_RI before setting SRR0 and SRR1. */\
- li r0,MSR_RI; \
- mfmsr r9; /* get MSR value */ \
- andc r9,r9,r0; \
- mtmsrd r9,1; /* Clear MSR_RI */ \
- /* Move original SRR0 and SRR1 into the respective regs */ \
- ld r9,_MSR(r1); \
- mtspr SPRN_SRR1,r9; \
- ld r3,_NIP(r1); \
- mtspr SPRN_SRR0,r3; \
- ld r9,_CTR(r1); \
- mtctr r9; \
- ld r9,_XER(r1); \
- mtxer r9; \
- ld r9,_LINK(r1); \
- mtlr r9; \
- REST_GPR(0, r1); \
- REST_8GPRS(2, r1); \
- REST_GPR(10, r1); \
- ld r11,_CCR(r1); \
- mtcr r11; \
- /* Decrement paca->in_mce. */ \
- lhz r12,PACA_IN_MCE(r13); \
- subi r12,r12,1; \
- sth r12,PACA_IN_MCE(r13); \
- REST_GPR(11, r1); \
- REST_2GPRS(12, r1); \
- /* restore original r1. */ \
- ld r1,GPR1(r1)
-
- /*
- * Handle machine check early in real mode. We come here with
- * ME=1, MMU (IR=0 and DR=0) off and using MC emergency stack.
- */
- .align 7
- .globl machine_check_handle_early
-machine_check_handle_early:
-BEGIN_FTR_SECTION
- std r0,GPR0(r1) /* Save r0 */
- EXCEPTION_PROLOG_COMMON_3(0x200)
- bl .save_nvgprs
- addi r3,r1,STACK_FRAME_OVERHEAD
- bl .machine_check_early
- ld r12,_MSR(r1)
-#ifdef CONFIG_PPC_P7_NAP
- /*
- * Check if thread was in power saving mode. We come here when any
- * of the following is true:
- * a. thread wasn't in power saving mode
- * b. thread was in power saving mode with no state loss or
- * supervisor state loss
- *
- * Go back to nap again if (b) is true.
- */
- rlwinm. r11,r12,47-31,30,31 /* Was it in power saving mode? */
- beq 4f /* No, it wasn;t */
- /* Thread was in power saving mode. Go back to nap again. */
- cmpwi r11,2
- bne 3f
- /* Supervisor state loss */
- li r0,1
- stb r0,PACA_NAPSTATELOST(r13)
-3: bl .machine_check_queue_event
- MACHINE_CHECK_HANDLER_WINDUP
- GET_PACA(r13)
- ld r1,PACAR1(r13)
- b .power7_enter_nap_mode
-4:
-#endif
- /*
- * Check if we are coming from hypervisor userspace. If yes then we
- * continue in host kernel in V mode to deliver the MC event.
- */
- rldicl. r11,r12,4,63 /* See if MC hit while in HV mode. */
- beq 5f
- andi. r11,r12,MSR_PR /* See if coming from user. */
- bne 9f /* continue in V mode if we are. */
-
-5:
-#ifdef CONFIG_KVM_BOOK3S_64_HV
- /*
- * We are coming from kernel context. Check if we are coming from
- * guest. if yes, then we can continue. We will fall through
- * do_kvm_200->kvmppc_interrupt to deliver the MC event to guest.
- */
- lbz r11,HSTATE_IN_GUEST(r13)
- cmpwi r11,0 /* Check if coming from guest */
- bne 9f /* continue if we are. */
-#endif
- /*
- * At this point we are not sure about what context we come from.
- * Queue up the MCE event and return from the interrupt.
- * But before that, check if this is an un-recoverable exception.
- * If yes, then stay on emergency stack and panic.
- */
- andi. r11,r12,MSR_RI
- bne 2f
-1: addi r3,r1,STACK_FRAME_OVERHEAD
- bl .unrecoverable_exception
- b 1b
-2:
- /*
- * Return from MC interrupt.
- * Queue up the MCE event so that we can log it later, while
- * returning from kernel or opal call.
- */
- bl .machine_check_queue_event
- MACHINE_CHECK_HANDLER_WINDUP
- rfid
-9:
- /* Deliver the machine check to host kernel in V mode. */
- MACHINE_CHECK_HANDLER_WINDUP
- b machine_check_pSeries
-END_FTR_SECTION_IFSET(CPU_FTR_HVMODE)
-
STD_EXCEPTION_COMMON_ASYNC(0x500, hardware_interrupt, do_IRQ)
STD_EXCEPTION_COMMON_ASYNC(0x900, decrementer, .timer_interrupt)
STD_EXCEPTION_COMMON(0x980, hdecrementer, .hdec_interrupt)
b machine_check_pSeries
#endif /* CONFIG_PPC_POWERNV */
+ /*
+ * Machine check is different because we use a different
+ * save area: PACA_EXMC instead of PACA_EXGEN.
+ */
+ .align 7
+ .globl machine_check_common
+machine_check_common:
+
+ mfspr r10,SPRN_DAR
+ std r10,PACA_EXGEN+EX_DAR(r13)
+ mfspr r10,SPRN_DSISR
+ stw r10,PACA_EXGEN+EX_DSISR(r13)
+ EXCEPTION_PROLOG_COMMON(0x200, PACA_EXMC)
+ FINISH_NAP
+ DISABLE_INTS
+ ld r3,PACA_EXGEN+EX_DAR(r13)
+ lwz r4,PACA_EXGEN+EX_DSISR(r13)
+ std r3,_DAR(r1)
+ std r4,_DSISR(r1)
+ bl .save_nvgprs
+ addi r3,r1,STACK_FRAME_OVERHEAD
+ bl .machine_check_exception
+ b .ret_from_except
+
+#define MACHINE_CHECK_HANDLER_WINDUP \
+ /* Clear MSR_RI before setting SRR0 and SRR1. */\
+ li r0,MSR_RI; \
+ mfmsr r9; /* get MSR value */ \
+ andc r9,r9,r0; \
+ mtmsrd r9,1; /* Clear MSR_RI */ \
+ /* Move original SRR0 and SRR1 into the respective regs */ \
+ ld r9,_MSR(r1); \
+ mtspr SPRN_SRR1,r9; \
+ ld r3,_NIP(r1); \
+ mtspr SPRN_SRR0,r3; \
+ ld r9,_CTR(r1); \
+ mtctr r9; \
+ ld r9,_XER(r1); \
+ mtxer r9; \
+ ld r9,_LINK(r1); \
+ mtlr r9; \
+ REST_GPR(0, r1); \
+ REST_8GPRS(2, r1); \
+ REST_GPR(10, r1); \
+ ld r11,_CCR(r1); \
+ mtcr r11; \
+ /* Decrement paca->in_mce. */ \
+ lhz r12,PACA_IN_MCE(r13); \
+ subi r12,r12,1; \
+ sth r12,PACA_IN_MCE(r13); \
+ REST_GPR(11, r1); \
+ REST_2GPRS(12, r1); \
+ /* restore original r1. */ \
+ ld r1,GPR1(r1)
+
+ /*
+ * Handle machine check early in real mode. We come here with
+ * ME=1, MMU (IR=0 and DR=0) off and using MC emergency stack.
+ */
+ .align 7
+ .globl machine_check_handle_early
+machine_check_handle_early:
+BEGIN_FTR_SECTION
+ std r0,GPR0(r1) /* Save r0 */
+ EXCEPTION_PROLOG_COMMON_3(0x200)
+ bl .save_nvgprs
+ addi r3,r1,STACK_FRAME_OVERHEAD
+ bl .machine_check_early
+ ld r12,_MSR(r1)
+#ifdef CONFIG_PPC_P7_NAP
+ /*
+ * Check if thread was in power saving mode. We come here when any
+ * of the following is true:
+ * a. thread wasn't in power saving mode
+ * b. thread was in power saving mode with no state loss or
+ * supervisor state loss
+ *
+ * Go back to nap again if (b) is true.
+ */
+ rlwinm. r11,r12,47-31,30,31 /* Was it in power saving mode? */
+ beq 4f /* No, it wasn;t */
+ /* Thread was in power saving mode. Go back to nap again. */
+ cmpwi r11,2
+ bne 3f
+ /* Supervisor state loss */
+ li r0,1
+ stb r0,PACA_NAPSTATELOST(r13)
+3: bl .machine_check_queue_event
+ MACHINE_CHECK_HANDLER_WINDUP
+ GET_PACA(r13)
+ ld r1,PACAR1(r13)
+ b .power7_enter_nap_mode
+4:
+#endif
+ /*
+ * Check if we are coming from hypervisor userspace. If yes then we
+ * continue in host kernel in V mode to deliver the MC event.
+ */
+ rldicl. r11,r12,4,63 /* See if MC hit while in HV mode. */
+ beq 5f
+ andi. r11,r12,MSR_PR /* See if coming from user. */
+ bne 9f /* continue in V mode if we are. */
+
+5:
+#ifdef CONFIG_KVM_BOOK3S_64_HV
+ /*
+ * We are coming from kernel context. Check if we are coming from
+ * guest. if yes, then we can continue. We will fall through
+ * do_kvm_200->kvmppc_interrupt to deliver the MC event to guest.
+ */
+ lbz r11,HSTATE_IN_GUEST(r13)
+ cmpwi r11,0 /* Check if coming from guest */
+ bne 9f /* continue if we are. */
+#endif
+ /*
+ * At this point we are not sure about what context we come from.
+ * Queue up the MCE event and return from the interrupt.
+ * But before that, check if this is an un-recoverable exception.
+ * If yes, then stay on emergency stack and panic.
+ */
+ andi. r11,r12,MSR_RI
+ bne 2f
+1: addi r3,r1,STACK_FRAME_OVERHEAD
+ bl .unrecoverable_exception
+ b 1b
+2:
+ /*
+ * Return from MC interrupt.
+ * Queue up the MCE event so that we can log it later, while
+ * returning from kernel or opal call.
+ */
+ bl .machine_check_queue_event
+ MACHINE_CHECK_HANDLER_WINDUP
+ rfid
+9:
+ /* Deliver the machine check to host kernel in V mode. */
+ MACHINE_CHECK_HANDLER_WINDUP
+ b machine_check_pSeries
+END_FTR_SECTION_IFSET(CPU_FTR_HVMODE)
+
/*
* r13 points to the PACA, r9 contains the saved CR,
projects / karo-tx-linux.git / blobdiff