#include <linux/config.h>#include <asm/cache.h>#include "entry.h"/* * For ivt.s we want to access the stack virtually so we don't have to disable translation * on interrupts. * *  On entry: *	r1:	pointer to current task (ar.k6) */#define MINSTATE_START_SAVE_MIN_VIRT								\(pUStk)	mov ar.rsc=0;		/* set enforced lazy mode, pl 0, little-endian, loadrs=0 */	\	;;											\(pUStk)	mov.m r24=ar.rnat;									\(pUStk)	addl r22=IA64_RBS_OFFSET,r1;			/* compute base of RBS */		\(pKStk) mov r1=sp;					/* get sp  */				\	;;											\(pUStk) lfetch.fault.excl.nt1 [r22];								\(pUStk)	addl r1=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r1;	/* compute base of memory stack */	\(pUStk)	mov r23=ar.bspstore;				/* save ar.bspstore */			\	;;											\(pUStk)	mov ar.bspstore=r22;				/* switch to kernel RBS */		\(pKStk) addl r1=-IA64_PT_REGS_SIZE,r1;			/* if in kernel mode, use sp (r12) */	\	;;											\(pUStk)	mov r18=ar.bsp;										\(pUStk)	mov ar.rsc=0x3;		/* set eager mode, pl 0, little-endian, loadrs=0 */		\#define MINSTATE_END_SAVE_MIN_VIRT								\	bsw.1;			/* switch back to bank 1 (must be last in insn group) */	\	;;/* * For mca_asm.S we want to access the stack physically since the state is saved before we * go virtual and don't want to destroy the iip or ipsr. */#define MINSTATE_START_SAVE_MIN_PHYS								\(pKStk) movl sp=ia64_init_stack+IA64_STK_OFFSET-IA64_PT_REGS_SIZE;				\(pUStk)	mov ar.rsc=0;		/* set enforced lazy mode, pl 0, little-endian, loadrs=0 */	\(pUStk)	addl r22=IA64_RBS_OFFSET,r1;		/* compute base of register backing store */	\	;;											\(pUStk)	mov r24=ar.rnat;									\(pKStk) tpa r1=sp;				/* compute physical addr of sp	*/		\(pUStk)	addl r1=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r1;	/* compute base of memory stack */	\(pUStk)	mov r23=ar.bspstore;				/* save ar.bspstore */			\(pUStk)	dep r22=-1,r22,61,3;			/* compute kernel virtual addr of RBS */	\	;;											\(pKStk) addl r1=-IA64_PT_REGS_SIZE,r1;		/* if in kernel mode, use sp (r12) */		\(pUStk)	mov ar.bspstore=r22;			/* switch to kernel RBS */			\	;;											\(pUStk)	mov r18=ar.bsp;										\(pUStk)	mov ar.rsc=0x3;		/* set eager mode, pl 0, little-endian, loadrs=0 */		\#define MINSTATE_END_SAVE_MIN_PHYS								\	or r12=r12,r14;		/* make sp a kernel virtual address */				\	or r13=r13,r14;		/* make `current' a kernel virtual address */			\	;;#ifdef MINSTATE_VIRT# define MINSTATE_GET_CURRENT(reg)	mov reg=IA64_KR(CURRENT)# define MINSTATE_START_SAVE_MIN	MINSTATE_START_SAVE_MIN_VIRT# define MINSTATE_END_SAVE_MIN		MINSTATE_END_SAVE_MIN_VIRT#endif#ifdef MINSTATE_PHYS# define MINSTATE_GET_CURRENT(reg)	mov reg=IA64_KR(CURRENT);; dep reg=0,reg,61,3# define MINSTATE_START_SAVE_MIN	MINSTATE_START_SAVE_MIN_PHYS# define MINSTATE_END_SAVE_MIN		MINSTATE_END_SAVE_MIN_PHYS#endif/* * DO_SAVE_MIN switches to the kernel stacks (if necessary) and saves * the minimum state necessary that allows us to turn psr.ic back * on. * * Assumed state upon entry: *	psr.ic: off *	r31:	contains saved predicates (pr) * * Upon exit, the state is as follows: *	psr.ic: off *	 r2 = points to &pt_regs.r16 *	 r8 = contents of ar.ccv *	 r9 = contents of ar.csd *	r10 = contents of ar.ssd *	r11 = FPSR_DEFAULT *	r12 = kernel sp (kernel virtual address) *	r13 = points to current task_struct (kernel virtual address) *	p15 = TRUE if psr.i is set in cr.ipsr *	predicate registers (other than p2, p3, and p15), b6, r3, r14, r15: *		preserved * * Note that psr.ic is NOT turned on by this macro.  This is so that * we can pass interruption state as arguments to a handler. */#define DO_SAVE_MIN(COVER,SAVE_IFS,EXTRA)							\	MINSTATE_GET_CURRENT(r16);	/* M (or M;;I) */					\	mov r27=ar.rsc;			/* M */							\	mov r20=r1;			/* A */							\	mov r25=ar.unat;		/* M */							\	mov r29=cr.ipsr;		/* M */							\	mov r26=ar.pfs;			/* I */							\	mov r28=cr.iip;			/* M */							\	mov r21=ar.fpsr;		/* M */							\	COVER;				/* B;; (or nothing) */					\	;;											\	adds r16=IA64_TASK_THREAD_ON_USTACK_OFFSET,r16;						\	;;											\	ld1 r17=[r16];				/* load current->thread.on_ustack flag */	\	st1 [r16]=r0;				/* clear current->thread.on_ustack flag */	\	adds r1=-IA64_TASK_THREAD_ON_USTACK_OFFSET,r16						\	/* switch from user to kernel RBS: */							\	;;											\	invala;				/* M */							\	SAVE_IFS;										\	cmp.eq pKStk,pUStk=r0,r17;		/* are we in kernel mode already? */		\	;;											\	MINSTATE_START_SAVE_MIN									\	adds r17=2*L1_CACHE_BYTES,r1;		/* really: biggest cache-line size */		\	adds r16=PT(CR_IPSR),r1;								\	;;											\	lfetch.fault.excl.nt1 [r17],L1_CACHE_BYTES;						\	st8 [r16]=r29;		/* save cr.ipsr */						\	;;											\	lfetch.fault.excl.nt1 [r17];								\	tbit.nz p15,p0=r29,IA64_PSR_I_BIT;							\	mov r29=b0										\	;;											\	adds r16=PT(R8),r1;	/* initialize first base pointer */				\	adds r17=PT(R9),r1;	/* initialize second base pointer */				\(pKStk)	mov r18=r0;		/* make sure r18 isn't NaT */					\	;;											\.mem.offset 0,0; st8.spill [r16]=r8,16;								\.mem.offset 8,0; st8.spill [r17]=r9,16;								\        ;;											\.mem.offset 0,0; st8.spill [r16]=r10,24;							\.mem.offset 8,0; st8.spill [r17]=r11,24;							\        ;;											\	st8 [r16]=r28,16;	/* save cr.iip */						\	st8 [r17]=r30,16;	/* save cr.ifs */						\(pUStk)	sub r18=r18,r22;	/* r18=RSE.ndirty*8 */						\	mov r8=ar.ccv;										\	mov r9=ar.csd;										\	mov r10=ar.ssd;										\	movl r11=FPSR_DEFAULT;   /* L-unit */							\	;;											\	st8 [r16]=r25,16;	/* save ar.unat */						\	st8 [r17]=r26,16;	/* save ar.pfs */						\	shl r18=r18,16;		/* compute ar.rsc to be used for "loadrs" */			\	;;											\	st8 [r16]=r27,16;	/* save ar.rsc */						\(pUStk)	st8 [r17]=r24,16;	/* save ar.rnat */						\(pKStk)	adds r17=16,r17;	/* skip over ar_rnat field */					\	;;			/* avoid RAW on r16 & r17 */					\(pUStk)	st8 [r16]=r23,16;	/* save ar.bspstore */						\	st8 [r17]=r31,16;	/* save predicates */						\(pKStk)	adds r16=16,r16;	/* skip over ar_bspstore field */				\	;;											\	st8 [r16]=r29,16;	/* save b0 */							\	st8 [r17]=r18,16;	/* save ar.rsc value for "loadrs" */				\	cmp.eq pNonSys,pSys=r0,r0	/* initialize pSys=0, pNonSys=1 */			\	;;											\.mem.offset 0,0; st8.spill [r16]=r20,16;	/* save original r1 */				\.mem.offset 8,0; st8.spill [r17]=r12,16;							\	adds r12=-16,r1;	/* switch to kernel memory stack (with 16 bytes of scratch) */	\	;;											\.mem.offset 0,0; st8.spill [r16]=r13,16;							\.mem.offset 8,0; st8.spill [r17]=r21,16;	/* save ar.fpsr */				\	mov r13=IA64_KR(CURRENT);	/* establish `current' */				\	;;											\.mem.offset 0,0; st8.spill [r16]=r15,16;							\.mem.offset 8,0; st8.spill [r17]=r14,16;							\	dep r14=-1,r0,61,3;									\	;;											\.mem.offset 0,0; st8.spill [r16]=r2,16;								\.mem.offset 8,0; st8.spill [r17]=r3,16;								\	adds r2=IA64_PT_REGS_R16_OFFSET,r1;							\	;;											\	EXTRA;											\	movl r1=__gp;		/* establish kernel global pointer */				\	;;											\	MINSTATE_END_SAVE_MIN/* * SAVE_REST saves the remainder of pt_regs (with psr.ic on). * * Assumed state upon entry: *	psr.ic: on *	r2:	points to &pt_regs.r16 *	r3:	points to &pt_regs.r17 *	r8:	contents of ar.ccv *	r9:	contents of ar.csd *	r10:	contents of ar.ssd *	r11:	FPSR_DEFAULT * * Registers r14 and r15 are guaranteed not to be touched by SAVE_REST. */#define SAVE_REST				\.mem.offset 0,0; st8.spill [r2]=r16,16;		\.mem.offset 8,0; st8.spill [r3]=r17,16;		\	;;					\.mem.offset 0,0; st8.spill [r2]=r18,16;		\.mem.offset 8,0; st8.spill [r3]=r19,16;		\	;;					\.mem.offset 0,0; st8.spill [r2]=r20,16;		\.mem.offset 8,0; st8.spill [r3]=r21,16;		\	mov r18=b6;				\	;;					\.mem.offset 0,0; st8.spill [r2]=r22,16;		\.mem.offset 8,0; st8.spill [r3]=r23,16;		\	mov r19=b7;				\	;;					\.mem.offset 0,0; st8.spill [r2]=r24,16;		\.mem.offset 8,0; st8.spill [r3]=r25,16;		\	;;					\.mem.offset 0,0; st8.spill [r2]=r26,16;		\.mem.offset 8,0; st8.spill [r3]=r27,16;		\	;;					\.mem.offset 0,0; st8.spill [r2]=r28,16;		\.mem.offset 8,0; st8.spill [r3]=r29,16;		\	;;					\.mem.offset 0,0; st8.spill [r2]=r30,16;		\.mem.offset 8,0; st8.spill [r3]=r31,32;		\	;;					\	mov ar.fpsr=r11;	/* M-unit */	\	st8 [r2]=r8,8;		/* ar.ccv */	\	adds r24=PT(B6)-PT(F7),r3;		\	;;					\	stf.spill [r2]=f6,32;			\	stf.spill [r3]=f7,32;			\	;;					\	stf.spill [r2]=f8,32;			\	stf.spill [r3]=f9,32;			\	;;					\	stf.spill [r2]=f10;			\	stf.spill [r3]=f11;			\	adds r25=PT(B7)-PT(F11),r3;		\	;;					\	st8 [r24]=r18,16;       /* b6 */	\	st8 [r25]=r19,16;       /* b7 */	\	;;					\	st8 [r24]=r9;        	/* ar.csd */	\	st8 [r25]=r10;      	/* ar.ssd */	\	;;#define SAVE_MIN_WITH_COVER	DO_SAVE_MIN(cover, mov r30=cr.ifs,)#define SAVE_MIN_WITH_COVER_R19	DO_SAVE_MIN(cover, mov r30=cr.ifs, mov r15=r19)#define SAVE_MIN		DO_SAVE_MIN(     , mov r30=r0, )