From: Mahesh Salgaonkar <mah...@linux.vnet.ibm.com>
This patch splits the common exception prolog logic into two parts to
facilitate reuse of existing code in the next patch. The second part will
be reused in the machine check exception routine in the next patch.
Please note that this patch does not introduce or change existing code
logic. Instead it is just a code movement.
Signed-off-by: Mahesh Salgaonkar <mah...@linux.vnet.ibm.com>
---
arch/powerpc/include/asm/exception-64s.h | 67 ++++++++++++++++--------------
1 file changed, 35 insertions(+), 32 deletions(-)
diff --git a/arch/powerpc/include/asm/exception-64s.h
b/arch/powerpc/include/asm/exception-64s.h
index 07ca627..2386d40 100644
--- a/arch/powerpc/include/asm/exception-64s.h
+++ b/arch/powerpc/include/asm/exception-64s.h
@@ -248,6 +248,40 @@ do_kvm_##n:
\
#define NOTEST(n)
+#define EXCEPTION_PROLOG_COMMON_2(n, area) \
+ std r2,GPR2(r1); /* save r2 in stackframe */ \
+ SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \
+ SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \
+ ld r9,area+EX_R9(r13); /* move r9, r10 to stackframe */ \
+ ld r10,area+EX_R10(r13); \
+ std r9,GPR9(r1); \
+ std r10,GPR10(r1); \
+ ld r9,area+EX_R11(r13); /* move r11 - r13 to stackframe */ \
+ ld r10,area+EX_R12(r13); \
+ ld r11,area+EX_R13(r13); \
+ std r9,GPR11(r1); \
+ std r10,GPR12(r1); \
+ std r11,GPR13(r1); \
+ BEGIN_FTR_SECTION_NESTED(66); \
+ ld r10,area+EX_CFAR(r13); \
+ std r10,ORIG_GPR3(r1); \
+ END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \
+ GET_LR(r9,area); /* Get LR, later save to stack */ \
+ ld r2,PACATOC(r13); /* get kernel TOC into r2 */ \
+ std r9,_LINK(r1); \
+ mfctr r10; /* save CTR in stackframe */ \
+ std r10,_CTR(r1); \
+ lbz r10,PACASOFTIRQEN(r13); \
+ mfspr r11,SPRN_XER; /* save XER in stackframe */ \
+ std r10,SOFTE(r1); \
+ std r11,_XER(r1); \
+ li r9,(n)+1; \
+ std r9,_TRAP(r1); /* set trap number */ \
+ li r10,0; \
+ ld r11,exception_marker@toc(r2); \
+ std r10,RESULT(r1); /* clear regs->result */ \
+ std r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame */
+
/*
* The common exception prolog is used for all except a few exceptions
* such as a segment miss on a kernel address. We have to be prepared
@@ -281,38 +315,7 @@ do_kvm_##n:
\
beq 4f; /* if from kernel mode */ \
ACCOUNT_CPU_USER_ENTRY(r9, r10); \
SAVE_PPR(area, r9, r10); \
-4: std r2,GPR2(r1); /* save r2 in stackframe */ \
- SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \
- SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \
- ld r9,area+EX_R9(r13); /* move r9, r10 to stackframe */ \
- ld r10,area+EX_R10(r13); \
- std r9,GPR9(r1); \
- std r10,GPR10(r1); \
- ld r9,area+EX_R11(r13); /* move r11 - r13 to stackframe */ \
- ld r10,area+EX_R12(r13); \
- ld r11,area+EX_R13(r13); \
- std r9,GPR11(r1); \
- std r10,GPR12(r1); \
- std r11,GPR13(r1); \
- BEGIN_FTR_SECTION_NESTED(66); \
- ld r10,area+EX_CFAR(r13); \
- std r10,ORIG_GPR3(r1); \
- END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \
- GET_LR(r9,area); /* Get LR, later save to stack */ \
- ld r2,PACATOC(r13); /* get kernel TOC into r2 */ \
- std r9,_LINK(r1); \
- mfctr r10; /* save CTR in stackframe */ \
- std r10,_CTR(r1); \
- lbz r10,PACASOFTIRQEN(r13); \
- mfspr r11,SPRN_XER; /* save XER in stackframe */ \
- std r10,SOFTE(r1); \
- std r11,_XER(r1); \
- li r9,(n)+1; \
- std r9,_TRAP(r1); /* set trap number */ \
- li r10,0; \
- ld r11,exception_marker@toc(r2); \
- std r10,RESULT(r1); /* clear regs->result */ \
- std r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame */ \
+4: EXCEPTION_PROLOG_COMMON_2(n, area) \
ACCOUNT_STOLEN_TIME
/*
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