arch/powerpc/include/asm/exception-64s.h - kernel/msm-4.9 - Gitiles

 #ifndef _ASM_POWERPC_EXCEPTION_H
 #define _ASM_POWERPC_EXCEPTION_H
 /*
  * Extracted from head_64.S
  *
  *  PowerPC version
  *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
  *
  *  Rewritten by Cort Dougan (cort@cs.nmt.edu) for PReP
  *    Copyright (C) 1996 Cort Dougan <cort@cs.nmt.edu>
  *  Adapted for Power Macintosh by Paul Mackerras.
  *  Low-level exception handlers and MMU support
  *  rewritten by Paul Mackerras.
  *    Copyright (C) 1996 Paul Mackerras.
  *
  *  Adapted for 64bit PowerPC by Dave Engebretsen, Peter Bergner, and
  *    Mike Corrigan {engebret|bergner|mikejc}@us.ibm.com
  *
  *  This file contains the low-level support and setup for the
  *  PowerPC-64 platform, including trap and interrupt dispatch.
  *
  *  This program is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU General Public License
  *  as published by the Free Software Foundation; either version
  *  2 of the License, or (at your option) any later version.
  */
 /*
  * The following macros define the code that appears as
  * the prologue to each of the exception handlers.  They
  * are split into two parts to allow a single kernel binary
  * to be used for pSeries and iSeries.
  *
  * We make as much of the exception code common between native
  * exception handlers (including pSeries LPAR) and iSeries LPAR
  * implementations as possible.
  */

 #define EX_R9		0
 #define EX_R10		8
 #define EX_R11		16
 #define EX_R12		24
 #define EX_R13		32
 #define EX_SRR0		40
 #define EX_DAR		48
 #define EX_DSISR	56
 #define EX_CCR		60
 #define EX_R3		64
 #define EX_LR		72
 #define EX_CFAR		80

 /*
  * We're short on space and time in the exception prolog, so we can't
  * use the normal SET_REG_IMMEDIATE macro. Normally we just need the
  * low halfword of the address, but for Kdump we need the whole low
  * word.
  */
 #define LOAD_HANDLER(reg, label)					\
 	addi	reg,reg,(label)-_stext;	/* virt addr of handler ... */

 /* Exception register prefixes */
 #define EXC_HV	H
 #define EXC_STD

 #define __EXCEPTION_PROLOG_1(area, extra, vec)				\
 	GET_PACA(r13);							\
 	std	r9,area+EX_R9(r13);	/* save r9 - r12 */		\
 	std	r10,area+EX_R10(r13);					\
 	BEGIN_FTR_SECTION_NESTED(66);					\
 	mfspr	r10,SPRN_CFAR;						\
 	std	r10,area+EX_CFAR(r13);					\
 	END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66);		\
 	mfcr	r9;							\
 	extra(vec);							\
 	std	r11,area+EX_R11(r13);					\
 	std	r12,area+EX_R12(r13);					\
 	GET_SCRATCH0(r10);						\
 	std	r10,area+EX_R13(r13)
 #define EXCEPTION_PROLOG_1(area, extra, vec)				\
 	__EXCEPTION_PROLOG_1(area, extra, vec)

 #define __EXCEPTION_PROLOG_PSERIES_1(label, h)				\
 	ld	r12,PACAKBASE(r13);	/* get high part of &label */	\
 	ld	r10,PACAKMSR(r13);	/* get MSR value for kernel */	\
 	mfspr	r11,SPRN_##h##SRR0;	/* save SRR0 */			\
 	LOAD_HANDLER(r12,label)						\
 	mtspr	SPRN_##h##SRR0,r12;					\
 	mfspr	r12,SPRN_##h##SRR1;	/* and SRR1 */			\
 	mtspr	SPRN_##h##SRR1,r10;					\
 	h##rfid;							\
 	b	.	/* prevent speculative execution */
 #define EXCEPTION_PROLOG_PSERIES_1(label, h)				\
 	__EXCEPTION_PROLOG_PSERIES_1(label, h)

 #define EXCEPTION_PROLOG_PSERIES(area, label, h, extra, vec)		\
 	EXCEPTION_PROLOG_1(area, extra, vec);				\
 	EXCEPTION_PROLOG_PSERIES_1(label, h);

 #define __KVMTEST(n)							\
 	lbz	r10,HSTATE_IN_GUEST(r13);			\
 	cmpwi	r10,0;							\
 	bne	do_kvm_##n

 #define __KVM_HANDLER(area, h, n)					\
 do_kvm_##n:								\
 	ld	r10,area+EX_R10(r13);					\
 	stw	r9,HSTATE_SCRATCH1(r13);			\
 	ld	r9,area+EX_R9(r13);					\
 	std	r12,HSTATE_SCRATCH0(r13);			\
 	li	r12,n;							\
 	b	kvmppc_interrupt

 #define __KVM_HANDLER_SKIP(area, h, n)					\
 do_kvm_##n:								\
 	cmpwi	r10,KVM_GUEST_MODE_SKIP;				\
 	ld	r10,area+EX_R10(r13);					\
 	beq	89f;							\
 	stw	r9,HSTATE_SCRATCH1(r13);			\
 	ld	r9,area+EX_R9(r13);					\
 	std	r12,HSTATE_SCRATCH0(r13);			\
 	li	r12,n;							\
 	b	kvmppc_interrupt;					\
 89:	mtocrf	0x80,r9;						\
 	ld	r9,area+EX_R9(r13);					\
 	b	kvmppc_skip_##h##interrupt

 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
 #define KVMTEST(n)			__KVMTEST(n)
 #define KVM_HANDLER(area, h, n)		__KVM_HANDLER(area, h, n)
 #define KVM_HANDLER_SKIP(area, h, n)	__KVM_HANDLER_SKIP(area, h, n)

 #else
 #define KVMTEST(n)
 #define KVM_HANDLER(area, h, n)
 #define KVM_HANDLER_SKIP(area, h, n)
 #endif

 #ifdef CONFIG_KVM_BOOK3S_PR
 #define KVMTEST_PR(n)			__KVMTEST(n)
 #define KVM_HANDLER_PR(area, h, n)	__KVM_HANDLER(area, h, n)
 #define KVM_HANDLER_PR_SKIP(area, h, n)	__KVM_HANDLER_SKIP(area, h, n)

 #else
 #define KVMTEST_PR(n)
 #define KVM_HANDLER_PR(area, h, n)
 #define KVM_HANDLER_PR_SKIP(area, h, n)
 #endif

 #define NOTEST(n)

 /*
  * 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
  * to take another exception from the point where we first touch the
  * kernel stack onwards.
  *
  * On entry r13 points to the paca, r9-r13 are saved in the paca,
  * r9 contains the saved CR, r11 and r12 contain the saved SRR0 and
  * SRR1, and relocation is on.
  */
 #define EXCEPTION_PROLOG_COMMON(n, area)				   \
 	andi.	r10,r12,MSR_PR;		/* See if coming from user	*/ \
 	mr	r10,r1;			/* Save r1			*/ \
 	subi	r1,r1,INT_FRAME_SIZE;	/* alloc frame on kernel stack	*/ \
 	beq-	1f;							   \
 	ld	r1,PACAKSAVE(r13);	/* kernel stack to use		*/ \
 1:	cmpdi	cr1,r1,0;		/* check if r1 is in userspace	*/ \
 	blt+	cr1,3f;			/* abort if it is		*/ \
 	li	r1,(n);			/* will be reloaded later	*/ \
 	sth	r1,PACA_TRAP_SAVE(r13);					   \
 	std	r3,area+EX_R3(r13);					   \
 	addi	r3,r13,area;		/* r3 -> where regs are saved*/	   \
 	b	bad_stack;						   \
 3:	std	r9,_CCR(r1);		/* save CR in stackframe	*/ \
 	std	r11,_NIP(r1);		/* save SRR0 in stackframe	*/ \
 	std	r12,_MSR(r1);		/* save SRR1 in stackframe	*/ \
 	std	r10,0(r1);		/* make stack chain pointer	*/ \
 	std	r0,GPR0(r1);		/* save r0 in stackframe	*/ \
 	std	r10,GPR1(r1);		/* save r1 in stackframe	*/ \
 	ACCOUNT_CPU_USER_ENTRY(r9, r10);				   \
 	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);		   \
 	ld	r2,PACATOC(r13);	/* get kernel TOC into r2	*/ \
 	mflr	r9;			/* save LR in stackframe	*/ \
 	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	*/ \
 	ACCOUNT_STOLEN_TIME

 /*
  * Exception vectors.
  */
 #define STD_EXCEPTION_PSERIES(loc, vec, label)		\
 	. = loc;					\
 	.globl label##_pSeries;				\
 label##_pSeries:					\
 	HMT_MEDIUM;					\
 	SET_SCRATCH0(r13);		/* save r13 */		\
 	EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common,	\
 				 EXC_STD, KVMTEST_PR, vec)

 #define STD_EXCEPTION_HV(loc, vec, label)		\
 	. = loc;					\
 	.globl label##_hv;				\
 label##_hv:						\
 	HMT_MEDIUM;					\
 	SET_SCRATCH0(r13);	/* save r13 */			\
 	EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common,	\
 				 EXC_HV, KVMTEST, vec)

 /* This associate vector numbers with bits in paca->irq_happened */
 #define SOFTEN_VALUE_0x500	PACA_IRQ_EE
 #define SOFTEN_VALUE_0x502	PACA_IRQ_EE
 #define SOFTEN_VALUE_0x900	PACA_IRQ_DEC
 #define SOFTEN_VALUE_0x982	PACA_IRQ_DEC

 #define __SOFTEN_TEST(h, vec)						\
 	lbz	r10,PACASOFTIRQEN(r13);					\
 	cmpwi	r10,0;							\
 	li	r10,SOFTEN_VALUE_##vec;					\
 	beq	masked_##h##interrupt
 #define _SOFTEN_TEST(h, vec)	__SOFTEN_TEST(h, vec)

 #define SOFTEN_TEST_PR(vec)						\
 	KVMTEST_PR(vec);						\
 	_SOFTEN_TEST(EXC_STD, vec)

 #define SOFTEN_TEST_HV(vec)						\
 	KVMTEST(vec);							\
 	_SOFTEN_TEST(EXC_HV, vec)

 #define SOFTEN_TEST_HV_201(vec)						\
 	KVMTEST(vec);							\
 	_SOFTEN_TEST(EXC_STD, vec)

 #define __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)		\
 	HMT_MEDIUM;							\
 	SET_SCRATCH0(r13);    /* save r13 */				\
 	__EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec);		\
 	EXCEPTION_PROLOG_PSERIES_1(label##_common, h);
 #define _MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)		\
 	__MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)

 #define MASKABLE_EXCEPTION_PSERIES(loc, vec, label)			\
 	. = loc;							\
 	.globl label##_pSeries;						\
 label##_pSeries:							\
 	_MASKABLE_EXCEPTION_PSERIES(vec, label,				\
 				    EXC_STD, SOFTEN_TEST_PR)

 #define MASKABLE_EXCEPTION_HV(loc, vec, label)				\
 	. = loc;							\
 	.globl label##_hv;						\
 label##_hv:								\
 	_MASKABLE_EXCEPTION_PSERIES(vec, label,				\
 				    EXC_HV, SOFTEN_TEST_HV)

 /*
  * Our exception common code can be passed various "additions"
  * to specify the behaviour of interrupts, whether to kick the
  * runlatch, etc...
  */

 /* Exception addition: Hard disable interrupts */
 #define DISABLE_INTS	SOFT_DISABLE_INTS(r10,r11)

 #define ADD_NVGPRS				\
 	bl	.save_nvgprs

 #define RUNLATCH_ON				\
 BEGIN_FTR_SECTION				\
 	CURRENT_THREAD_INFO(r3, r1);		\
 	ld	r4,TI_LOCAL_FLAGS(r3);		\
 	andi.	r0,r4,_TLF_RUNLATCH;		\
 	beql	ppc64_runlatch_on_trampoline;	\
 END_FTR_SECTION_IFSET(CPU_FTR_CTRL)

 #define EXCEPTION_COMMON(trap, label, hdlr, ret, additions)	\
 	.align	7;						\
 	.globl label##_common;					\
 label##_common:							\
 	EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN);		\
 	additions;						\
 	addi	r3,r1,STACK_FRAME_OVERHEAD;			\
 	bl	hdlr;						\
 	b	ret

 #define STD_EXCEPTION_COMMON(trap, label, hdlr)			\
 	EXCEPTION_COMMON(trap, label, hdlr, ret_from_except,	\
 			 ADD_NVGPRS;DISABLE_INTS)

 /*
  * Like STD_EXCEPTION_COMMON, but for exceptions that can occur
  * in the idle task and therefore need the special idle handling
  * (finish nap and runlatch)
  */
 #define STD_EXCEPTION_COMMON_ASYNC(trap, label, hdlr)		  \
 	EXCEPTION_COMMON(trap, label, hdlr, ret_from_except_lite, \
 			 FINISH_NAP;RUNLATCH_ON;DISABLE_INTS)

 /*
  * When the idle code in power4_idle puts the CPU into NAP mode,
  * it has to do so in a loop, and relies on the external interrupt
  * and decrementer interrupt entry code to get it out of the loop.
  * It sets the _TLF_NAPPING bit in current_thread_info()->local_flags
  * to signal that it is in the loop and needs help to get out.
  */
 #ifdef CONFIG_PPC_970_NAP
 #define FINISH_NAP				\
 BEGIN_FTR_SECTION				\
 	CURRENT_THREAD_INFO(r11, r1);		\
 	ld	r9,TI_LOCAL_FLAGS(r11);		\
 	andi.	r10,r9,_TLF_NAPPING;		\
 	bnel	power4_fixup_nap;		\
 END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP)
 #else
 #define FINISH_NAP
 #endif

 #endif	/* _ASM_POWERPC_EXCEPTION_H */
	#ifndef _ASM_POWERPC_EXCEPTION_H
	#define _ASM_POWERPC_EXCEPTION_H
	/*
	* Extracted from head_64.S
	*
	* PowerPC version
	* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
	*
	* Rewritten by Cort Dougan (cort@cs.nmt.edu) for PReP
	* Copyright (C) 1996 Cort Dougan <cort@cs.nmt.edu>
	* Adapted for Power Macintosh by Paul Mackerras.
	* Low-level exception handlers and MMU support
	* rewritten by Paul Mackerras.
	* Copyright (C) 1996 Paul Mackerras.
	*
	* Adapted for 64bit PowerPC by Dave Engebretsen, Peter Bergner, and
	* Mike Corrigan {engebret\|bergner\|mikejc}@us.ibm.com
	*
	* This file contains the low-level support and setup for the
	* PowerPC-64 platform, including trap and interrupt dispatch.
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License
	* as published by the Free Software Foundation; either version
	* 2 of the License, or (at your option) any later version.
	*/
	/*
	* The following macros define the code that appears as
	* the prologue to each of the exception handlers. They
	* are split into two parts to allow a single kernel binary
	* to be used for pSeries and iSeries.
	*
	* We make as much of the exception code common between native
	* exception handlers (including pSeries LPAR) and iSeries LPAR
	* implementations as possible.
	*/

	#define EX_R9 0
	#define EX_R10 8
	#define EX_R11 16
	#define EX_R12 24
	#define EX_R13 32
	#define EX_SRR0 40
	#define EX_DAR 48
	#define EX_DSISR 56
	#define EX_CCR 60
	#define EX_R3 64
	#define EX_LR 72
	#define EX_CFAR 80

	/*
	* We're short on space and time in the exception prolog, so we can't
	* use the normal SET_REG_IMMEDIATE macro. Normally we just need the
	* low halfword of the address, but for Kdump we need the whole low
	* word.
	*/
	#define LOAD_HANDLER(reg, label) \
	addi reg,reg,(label)-_stext; /* virt addr of handler ... */

	/* Exception register prefixes */
	#define EXC_HV H
	#define EXC_STD

	#define __EXCEPTION_PROLOG_1(area, extra, vec) \
	GET_PACA(r13); \
	std r9,area+EX_R9(r13); /* save r9 - r12 */ \
	std r10,area+EX_R10(r13); \
	BEGIN_FTR_SECTION_NESTED(66); \
	mfspr r10,SPRN_CFAR; \
	std r10,area+EX_CFAR(r13); \
	END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \
	mfcr r9; \
	extra(vec); \
	std r11,area+EX_R11(r13); \
	std r12,area+EX_R12(r13); \
	GET_SCRATCH0(r10); \
	std r10,area+EX_R13(r13)
	#define EXCEPTION_PROLOG_1(area, extra, vec) \
	__EXCEPTION_PROLOG_1(area, extra, vec)

	#define __EXCEPTION_PROLOG_PSERIES_1(label, h) \
	ld r12,PACAKBASE(r13); /* get high part of &label */ \
	ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \
	mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \
	LOAD_HANDLER(r12,label) \
	mtspr SPRN_##h##SRR0,r12; \
	mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \
	mtspr SPRN_##h##SRR1,r10; \
	h##rfid; \
	b . /* prevent speculative execution */
	#define EXCEPTION_PROLOG_PSERIES_1(label, h) \
	__EXCEPTION_PROLOG_PSERIES_1(label, h)

	#define EXCEPTION_PROLOG_PSERIES(area, label, h, extra, vec) \
	EXCEPTION_PROLOG_1(area, extra, vec); \
	EXCEPTION_PROLOG_PSERIES_1(label, h);

	#define __KVMTEST(n) \
	lbz r10,HSTATE_IN_GUEST(r13); \
	cmpwi r10,0; \
	bne do_kvm_##n

	#define __KVM_HANDLER(area, h, n) \
	do_kvm_##n: \
	ld r10,area+EX_R10(r13); \
	stw r9,HSTATE_SCRATCH1(r13); \
	ld r9,area+EX_R9(r13); \
	std r12,HSTATE_SCRATCH0(r13); \
	li r12,n; \
	b kvmppc_interrupt

	#define __KVM_HANDLER_SKIP(area, h, n) \
	do_kvm_##n: \
	cmpwi r10,KVM_GUEST_MODE_SKIP; \
	ld r10,area+EX_R10(r13); \
	beq 89f; \
	stw r9,HSTATE_SCRATCH1(r13); \
	ld r9,area+EX_R9(r13); \
	std r12,HSTATE_SCRATCH0(r13); \
	li r12,n; \
	b kvmppc_interrupt; \
	89: mtocrf 0x80,r9; \
	ld r9,area+EX_R9(r13); \
	b kvmppc_skip_##h##interrupt

	#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
	#define KVMTEST(n) __KVMTEST(n)
	#define KVM_HANDLER(area, h, n) __KVM_HANDLER(area, h, n)
	#define KVM_HANDLER_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n)

	#else
	#define KVMTEST(n)
	#define KVM_HANDLER(area, h, n)
	#define KVM_HANDLER_SKIP(area, h, n)
	#endif

	#ifdef CONFIG_KVM_BOOK3S_PR
	#define KVMTEST_PR(n) __KVMTEST(n)
	#define KVM_HANDLER_PR(area, h, n) __KVM_HANDLER(area, h, n)
	#define KVM_HANDLER_PR_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n)

	#else
	#define KVMTEST_PR(n)
	#define KVM_HANDLER_PR(area, h, n)
	#define KVM_HANDLER_PR_SKIP(area, h, n)
	#endif

	#define NOTEST(n)

	/*
	* 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
	* to take another exception from the point where we first touch the
	* kernel stack onwards.
	*
	* On entry r13 points to the paca, r9-r13 are saved in the paca,
	* r9 contains the saved CR, r11 and r12 contain the saved SRR0 and
	* SRR1, and relocation is on.
	*/
	#define EXCEPTION_PROLOG_COMMON(n, area) \
	andi. r10,r12,MSR_PR; /* See if coming from user */ \
	mr r10,r1; /* Save r1 */ \
	subi r1,r1,INT_FRAME_SIZE; /* alloc frame on kernel stack */ \
	beq- 1f; \
	ld r1,PACAKSAVE(r13); /* kernel stack to use */ \
	1: cmpdi cr1,r1,0; /* check if r1 is in userspace */ \
	blt+ cr1,3f; /* abort if it is */ \
	li r1,(n); /* will be reloaded later */ \
	sth r1,PACA_TRAP_SAVE(r13); \
	std r3,area+EX_R3(r13); \
	addi r3,r13,area; /* r3 -> where regs are saved*/ \
	b bad_stack; \
	3: std r9,_CCR(r1); /* save CR in stackframe */ \
	std r11,_NIP(r1); /* save SRR0 in stackframe */ \
	std r12,_MSR(r1); /* save SRR1 in stackframe */ \
	std r10,0(r1); /* make stack chain pointer */ \
	std r0,GPR0(r1); /* save r0 in stackframe */ \
	std r10,GPR1(r1); /* save r1 in stackframe */ \
	ACCOUNT_CPU_USER_ENTRY(r9, r10); \
	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); \
	ld r2,PACATOC(r13); /* get kernel TOC into r2 */ \
	mflr r9; /* save LR in stackframe */ \
	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 */ \
	ACCOUNT_STOLEN_TIME

	/*
	* Exception vectors.
	*/
	#define STD_EXCEPTION_PSERIES(loc, vec, label) \
	. = loc; \
	.globl label##_pSeries; \
	label##_pSeries: \
	HMT_MEDIUM; \
	SET_SCRATCH0(r13); /* save r13 */ \
	EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \
	EXC_STD, KVMTEST_PR, vec)

	#define STD_EXCEPTION_HV(loc, vec, label) \
	. = loc; \
	.globl label##_hv; \
	label##_hv: \
	HMT_MEDIUM; \
	SET_SCRATCH0(r13); /* save r13 */ \
	EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \
	EXC_HV, KVMTEST, vec)

	/* This associate vector numbers with bits in paca->irq_happened */
	#define SOFTEN_VALUE_0x500 PACA_IRQ_EE
	#define SOFTEN_VALUE_0x502 PACA_IRQ_EE
	#define SOFTEN_VALUE_0x900 PACA_IRQ_DEC
	#define SOFTEN_VALUE_0x982 PACA_IRQ_DEC

	#define __SOFTEN_TEST(h, vec) \
	lbz r10,PACASOFTIRQEN(r13); \
	cmpwi r10,0; \
	li r10,SOFTEN_VALUE_##vec; \
	beq masked_##h##interrupt
	#define _SOFTEN_TEST(h, vec) __SOFTEN_TEST(h, vec)

	#define SOFTEN_TEST_PR(vec) \
	KVMTEST_PR(vec); \
	_SOFTEN_TEST(EXC_STD, vec)

	#define SOFTEN_TEST_HV(vec) \
	KVMTEST(vec); \
	_SOFTEN_TEST(EXC_HV, vec)

	#define SOFTEN_TEST_HV_201(vec) \
	KVMTEST(vec); \
	_SOFTEN_TEST(EXC_STD, vec)

	#define __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \
	HMT_MEDIUM; \
	SET_SCRATCH0(r13); /* save r13 */ \
	__EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \
	EXCEPTION_PROLOG_PSERIES_1(label##_common, h);
	#define _MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \
	__MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)

	#define MASKABLE_EXCEPTION_PSERIES(loc, vec, label) \
	. = loc; \
	.globl label##_pSeries; \
	label##_pSeries: \
	_MASKABLE_EXCEPTION_PSERIES(vec, label, \
	EXC_STD, SOFTEN_TEST_PR)

	#define MASKABLE_EXCEPTION_HV(loc, vec, label) \
	. = loc; \
	.globl label##_hv; \
	label##_hv: \
	_MASKABLE_EXCEPTION_PSERIES(vec, label, \
	EXC_HV, SOFTEN_TEST_HV)

	/*
	* Our exception common code can be passed various "additions"
	* to specify the behaviour of interrupts, whether to kick the
	* runlatch, etc...
	*/

	/* Exception addition: Hard disable interrupts */
	#define DISABLE_INTS SOFT_DISABLE_INTS(r10,r11)

	#define ADD_NVGPRS \
	bl .save_nvgprs

	#define RUNLATCH_ON \
	BEGIN_FTR_SECTION \
	CURRENT_THREAD_INFO(r3, r1); \
	ld r4,TI_LOCAL_FLAGS(r3); \
	andi. r0,r4,_TLF_RUNLATCH; \
	beql ppc64_runlatch_on_trampoline; \
	END_FTR_SECTION_IFSET(CPU_FTR_CTRL)

	#define EXCEPTION_COMMON(trap, label, hdlr, ret, additions) \
	.align 7; \
	.globl label##_common; \
	label##_common: \
	EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN); \
	additions; \
	addi r3,r1,STACK_FRAME_OVERHEAD; \
	bl hdlr; \
	b ret

	#define STD_EXCEPTION_COMMON(trap, label, hdlr) \
	EXCEPTION_COMMON(trap, label, hdlr, ret_from_except, \
	ADD_NVGPRS;DISABLE_INTS)

	/*
	* Like STD_EXCEPTION_COMMON, but for exceptions that can occur
	* in the idle task and therefore need the special idle handling
	* (finish nap and runlatch)
	*/
	#define STD_EXCEPTION_COMMON_ASYNC(trap, label, hdlr) \
	EXCEPTION_COMMON(trap, label, hdlr, ret_from_except_lite, \
	FINISH_NAP;RUNLATCH_ON;DISABLE_INTS)

	/*
	* When the idle code in power4_idle puts the CPU into NAP mode,
	* it has to do so in a loop, and relies on the external interrupt
	* and decrementer interrupt entry code to get it out of the loop.
	* It sets the _TLF_NAPPING bit in current_thread_info()->local_flags
	* to signal that it is in the loop and needs help to get out.
	*/
	#ifdef CONFIG_PPC_970_NAP
	#define FINISH_NAP \
	BEGIN_FTR_SECTION \
	CURRENT_THREAD_INFO(r11, r1); \
	ld r9,TI_LOCAL_FLAGS(r11); \
	andi. r10,r9,_TLF_NAPPING; \
	bnel power4_fixup_nap; \
	END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP)
	#else
	#define FINISH_NAP
	#endif

	#endif /* _ASM_POWERPC_EXCEPTION_H */