Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1619 insertions, 0 deletions

diff --git a/arch/ia64/kernel/ivt.S b/arch/ia64/kernel/ivt.S
new file mode 100644
index 00000000000..d9c05d53435
--- /dev/null
+++ b/arch/ia64/kernel/ivt.S
@@ -0,0 +1,1619 @@
+/*
+ * arch/ia64/kernel/ivt.S
+ *
+ * Copyright (C) 1998-2001, 2003 Hewlett-Packard Co
+ *	Stephane Eranian <eranian@hpl.hp.com>
+ *	David Mosberger <davidm@hpl.hp.com>
+ * Copyright (C) 2000, 2002-2003 Intel Co
+ *	Asit Mallick <asit.k.mallick@intel.com>
+ *      Suresh Siddha <suresh.b.siddha@intel.com>
+ *      Kenneth Chen <kenneth.w.chen@intel.com>
+ *      Fenghua Yu <fenghua.yu@intel.com>
+ *
+ * 00/08/23 Asit Mallick <asit.k.mallick@intel.com> TLB handling for SMP
+ * 00/12/20 David Mosberger-Tang <davidm@hpl.hp.com> DTLB/ITLB handler now uses virtual PT.
+ */
+/*
+ * This file defines the interruption vector table used by the CPU.
+ * It does not include one entry per possible cause of interruption.
+ *
+ * The first 20 entries of the table contain 64 bundles each while the
+ * remaining 48 entries contain only 16 bundles each.
+ *
+ * The 64 bundles are used to allow inlining the whole handler for critical
+ * interruptions like TLB misses.
+ *
+ *  For each entry, the comment is as follows:
+ *
+ *		// 0x1c00 Entry 7 (size 64 bundles) Data Key Miss (12,51)
+ *  entry offset ----/     /         /                  /          /
+ *  entry number ---------/         /                  /          /
+ *  size of the entry -------------/                  /          /
+ *  vector name -------------------------------------/          /
+ *  interruptions triggering this vector ----------------------/
+ *
+ * The table is 32KB in size and must be aligned on 32KB boundary.
+ * (The CPU ignores the 15 lower bits of the address)
+ *
+ * Table is based upon EAS2.6 (Oct 1999)
+ */
+
+#include <linux/config.h>
+
+#include <asm/asmmacro.h>
+#include <asm/break.h>
+#include <asm/ia32.h>
+#include <asm/kregs.h>
+#include <asm/offsets.h>
+#include <asm/pgtable.h>
+#include <asm/processor.h>
+#include <asm/ptrace.h>
+#include <asm/system.h>
+#include <asm/thread_info.h>
+#include <asm/unistd.h>
+#include <asm/errno.h>
+
+#if 1
+# define PSR_DEFAULT_BITS	psr.ac
+#else
+# define PSR_DEFAULT_BITS	0
+#endif
+
+#if 0
+  /*
+   * This lets you track the last eight faults that occurred on the CPU.  Make sure ar.k2 isn't
+   * needed for something else before enabling this...
+   */
+# define DBG_FAULT(i)	mov r16=ar.k2;;	shl r16=r16,8;;	add r16=(i),r16;;mov ar.k2=r16
+#else
+# define DBG_FAULT(i)
+#endif
+
+#define MINSTATE_VIRT	/* needed by minstate.h */
+#include "minstate.h"
+
+#define FAULT(n)									\
+	mov r31=pr;									\
+	mov r19=n;;			/* prepare to save predicates */		\
+	br.sptk.many dispatch_to_fault_handler
+
+	.section .text.ivt,"ax"
+
+	.align 32768	// align on 32KB boundary
+	.global ia64_ivt
+ia64_ivt:
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x0000 Entry 0 (size 64 bundles) VHPT Translation (8,20,47)
+ENTRY(vhpt_miss)
+	DBG_FAULT(0)
+	/*
+	 * The VHPT vector is invoked when the TLB entry for the virtual page table
+	 * is missing.  This happens only as a result of a previous
+	 * (the "original") TLB miss, which may either be caused by an instruction
+	 * fetch or a data access (or non-access).
+	 *
+	 * What we do here is normal TLB miss handing for the _original_ miss, followed
+	 * by inserting the TLB entry for the virtual page table page that the VHPT
+	 * walker was attempting to access.  The latter gets inserted as long
+	 * as both L1 and L2 have valid mappings for the faulting address.
+	 * The TLB entry for the original miss gets inserted only if
+	 * the L3 entry indicates that the page is present.
+	 *
+	 * do_page_fault gets invoked in the following cases:
+	 *	- the faulting virtual address uses unimplemented address bits
+	 *	- the faulting virtual address has no L1, L2, or L3 mapping
+	 */
+	mov r16=cr.ifa				// get address that caused the TLB miss
+#ifdef CONFIG_HUGETLB_PAGE
+	movl r18=PAGE_SHIFT
+	mov r25=cr.itir
+#endif
+	;;
+	rsm psr.dt				// use physical addressing for data
+	mov r31=pr				// save the predicate registers
+	mov r19=IA64_KR(PT_BASE)		// get page table base address
+	shl r21=r16,3				// shift bit 60 into sign bit
+	shr.u r17=r16,61			// get the region number into r17
+	;;
+	shr r22=r21,3
+#ifdef CONFIG_HUGETLB_PAGE
+	extr.u r26=r25,2,6
+	;;
+	cmp.ne p8,p0=r18,r26
+	sub r27=r26,r18
+	;;
+(p8)	dep r25=r18,r25,2,6
+(p8)	shr r22=r22,r27
+#endif
+	;;
+	cmp.eq p6,p7=5,r17			// is IFA pointing into to region 5?
+	shr.u r18=r22,PGDIR_SHIFT		// get bits 33-63 of the faulting address
+	;;
+(p7)	dep r17=r17,r19,(PAGE_SHIFT-3),3	// put region number bits in place
+
+	srlz.d
+	LOAD_PHYSICAL(p6, r19, swapper_pg_dir)	// region 5 is rooted at swapper_pg_dir
+
+	.pred.rel "mutex", p6, p7
+(p6)	shr.u r21=r21,PGDIR_SHIFT+PAGE_SHIFT
+(p7)	shr.u r21=r21,PGDIR_SHIFT+PAGE_SHIFT-3
+	;;
+(p6)	dep r17=r18,r19,3,(PAGE_SHIFT-3)	// r17=PTA + IFA(33,42)*8
+(p7)	dep r17=r18,r17,3,(PAGE_SHIFT-6)	// r17=PTA + (((IFA(61,63) << 7) | IFA(33,39))*8)
+	cmp.eq p7,p6=0,r21			// unused address bits all zeroes?
+	shr.u r18=r22,PMD_SHIFT			// shift L2 index into position
+	;;
+	ld8 r17=[r17]				// fetch the L1 entry (may be 0)
+	;;
+(p7)	cmp.eq p6,p7=r17,r0			// was L1 entry NULL?
+	dep r17=r18,r17,3,(PAGE_SHIFT-3)	// compute address of L2 page table entry
+	;;
+(p7)	ld8 r20=[r17]				// fetch the L2 entry (may be 0)
+	shr.u r19=r22,PAGE_SHIFT		// shift L3 index into position
+	;;
+(p7)	cmp.eq.or.andcm p6,p7=r20,r0		// was L2 entry NULL?
+	dep r21=r19,r20,3,(PAGE_SHIFT-3)	// compute address of L3 page table entry
+	;;
+(p7)	ld8 r18=[r21]				// read the L3 PTE
+	mov r19=cr.isr				// cr.isr bit 0 tells us if this is an insn miss
+	;;
+(p7)	tbit.z p6,p7=r18,_PAGE_P_BIT		// page present bit cleared?
+	mov r22=cr.iha				// get the VHPT address that caused the TLB miss
+	;;					// avoid RAW on p7
+(p7)	tbit.nz.unc p10,p11=r19,32		// is it an instruction TLB miss?
+	dep r23=0,r20,0,PAGE_SHIFT		// clear low bits to get page address
+	;;
+(p10)	itc.i r18				// insert the instruction TLB entry
+(p11)	itc.d r18				// insert the data TLB entry
+(p6)	br.cond.spnt.many page_fault		// handle bad address/page not present (page fault)
+	mov cr.ifa=r22
+
+#ifdef CONFIG_HUGETLB_PAGE
+(p8)	mov cr.itir=r25				// change to default page-size for VHPT
+#endif
+
+	/*
+	 * Now compute and insert the TLB entry for the virtual page table.  We never
+	 * execute in a page table page so there is no need to set the exception deferral
+	 * bit.
+	 */
+	adds r24=__DIRTY_BITS_NO_ED|_PAGE_PL_0|_PAGE_AR_RW,r23
+	;;
+(p7)	itc.d r24
+	;;
+#ifdef CONFIG_SMP
+	/*
+	 * Tell the assemblers dependency-violation checker that the above "itc" instructions
+	 * cannot possibly affect the following loads:
+	 */
+	dv_serialize_data
+
+	/*
+	 * Re-check L2 and L3 pagetable.  If they changed, we may have received a ptc.g
+	 * between reading the pagetable and the "itc".  If so, flush the entry we
+	 * inserted and retry.
+	 */
+	ld8 r25=[r21]				// read L3 PTE again
+	ld8 r26=[r17]				// read L2 entry again
+	;;
+	cmp.ne p6,p7=r26,r20			// did L2 entry change
+	mov r27=PAGE_SHIFT<<2
+	;;
+(p6)	ptc.l r22,r27				// purge PTE page translation
+(p7)	cmp.ne.or.andcm p6,p7=r25,r18		// did L3 PTE change
+	;;
+(p6)	ptc.l r16,r27				// purge translation
+#endif
+
+	mov pr=r31,-1				// restore predicate registers
+	rfi
+END(vhpt_miss)
+
+	.org ia64_ivt+0x400
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x0400 Entry 1 (size 64 bundles) ITLB (21)
+ENTRY(itlb_miss)
+	DBG_FAULT(1)
+	/*
+	 * The ITLB handler accesses the L3 PTE via the virtually mapped linear
+	 * page table.  If a nested TLB miss occurs, we switch into physical
+	 * mode, walk the page table, and then re-execute the L3 PTE read
+	 * and go on normally after that.
+	 */
+	mov r16=cr.ifa				// get virtual address
+	mov r29=b0				// save b0
+	mov r31=pr				// save predicates
+.itlb_fault:
+	mov r17=cr.iha				// get virtual address of L3 PTE
+	movl r30=1f				// load nested fault continuation point
+	;;
+1:	ld8 r18=[r17]				// read L3 PTE
+	;;
+	mov b0=r29
+	tbit.z p6,p0=r18,_PAGE_P_BIT		// page present bit cleared?
+(p6)	br.cond.spnt page_fault
+	;;
+	itc.i r18
+	;;
+#ifdef CONFIG_SMP
+	/*
+	 * Tell the assemblers dependency-violation checker that the above "itc" instructions
+	 * cannot possibly affect the following loads:
+	 */
+	dv_serialize_data
+
+	ld8 r19=[r17]				// read L3 PTE again and see if same
+	mov r20=PAGE_SHIFT<<2			// setup page size for purge
+	;;
+	cmp.ne p7,p0=r18,r19
+	;;
+(p7)	ptc.l r16,r20
+#endif
+	mov pr=r31,-1
+	rfi
+END(itlb_miss)
+
+	.org ia64_ivt+0x0800
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x0800 Entry 2 (size 64 bundles) DTLB (9,48)
+ENTRY(dtlb_miss)
+	DBG_FAULT(2)
+	/*
+	 * The DTLB handler accesses the L3 PTE via the virtually mapped linear
+	 * page table.  If a nested TLB miss occurs, we switch into physical
+	 * mode, walk the page table, and then re-execute the L3 PTE read
+	 * and go on normally after that.
+	 */
+	mov r16=cr.ifa				// get virtual address
+	mov r29=b0				// save b0
+	mov r31=pr				// save predicates
+dtlb_fault:
+	mov r17=cr.iha				// get virtual address of L3 PTE
+	movl r30=1f				// load nested fault continuation point
+	;;
+1:	ld8 r18=[r17]				// read L3 PTE
+	;;
+	mov b0=r29
+	tbit.z p6,p0=r18,_PAGE_P_BIT		// page present bit cleared?
+(p6)	br.cond.spnt page_fault
+	;;
+	itc.d r18
+	;;
+#ifdef CONFIG_SMP
+	/*
+	 * Tell the assemblers dependency-violation checker that the above "itc" instructions
+	 * cannot possibly affect the following loads:
+	 */
+	dv_serialize_data
+
+	ld8 r19=[r17]				// read L3 PTE again and see if same
+	mov r20=PAGE_SHIFT<<2			// setup page size for purge
+	;;
+	cmp.ne p7,p0=r18,r19
+	;;
+(p7)	ptc.l r16,r20
+#endif
+	mov pr=r31,-1
+	rfi
+END(dtlb_miss)
+
+	.org ia64_ivt+0x0c00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x0c00 Entry 3 (size 64 bundles) Alt ITLB (19)
+ENTRY(alt_itlb_miss)
+	DBG_FAULT(3)
+	mov r16=cr.ifa		// get address that caused the TLB miss
+	movl r17=PAGE_KERNEL
+	mov r21=cr.ipsr
+	movl r19=(((1 << IA64_MAX_PHYS_BITS) - 1) & ~0xfff)
+	mov r31=pr
+	;;
+#ifdef CONFIG_DISABLE_VHPT
+	shr.u r22=r16,61			// get the region number into r21
+	;;
+	cmp.gt p8,p0=6,r22			// user mode
+	;;
+(p8)	thash r17=r16
+	;;
+(p8)	mov cr.iha=r17
+(p8)	mov r29=b0				// save b0
+(p8)	br.cond.dptk .itlb_fault
+#endif
+	extr.u r23=r21,IA64_PSR_CPL0_BIT,2	// extract psr.cpl
+	and r19=r19,r16		// clear ed, reserved bits, and PTE control bits
+	shr.u r18=r16,57	// move address bit 61 to bit 4
+	;;
+	andcm r18=0x10,r18	// bit 4=~address-bit(61)
+	cmp.ne p8,p0=r0,r23	// psr.cpl != 0?
+	or r19=r17,r19		// insert PTE control bits into r19
+	;;
+	or r19=r19,r18		// set bit 4 (uncached) if the access was to region 6
+(p8)	br.cond.spnt page_fault
+	;;
+	itc.i r19		// insert the TLB entry
+	mov pr=r31,-1
+	rfi
+END(alt_itlb_miss)
+
+	.org ia64_ivt+0x1000
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x1000 Entry 4 (size 64 bundles) Alt DTLB (7,46)
+ENTRY(alt_dtlb_miss)
+	DBG_FAULT(4)
+	mov r16=cr.ifa		// get address that caused the TLB miss
+	movl r17=PAGE_KERNEL
+	mov r20=cr.isr
+	movl r19=(((1 << IA64_MAX_PHYS_BITS) - 1) & ~0xfff)
+	mov r21=cr.ipsr
+	mov r31=pr
+	;;
+#ifdef CONFIG_DISABLE_VHPT
+	shr.u r22=r16,61			// get the region number into r21
+	;;
+	cmp.gt p8,p0=6,r22			// access to region 0-5
+	;;
+(p8)	thash r17=r16
+	;;
+(p8)	mov cr.iha=r17
+(p8)	mov r29=b0				// save b0
+(p8)	br.cond.dptk dtlb_fault
+#endif
+	extr.u r23=r21,IA64_PSR_CPL0_BIT,2	// extract psr.cpl
+	and r22=IA64_ISR_CODE_MASK,r20		// get the isr.code field
+	tbit.nz p6,p7=r20,IA64_ISR_SP_BIT	// is speculation bit on?
+	shr.u r18=r16,57			// move address bit 61 to bit 4
+	and r19=r19,r16				// clear ed, reserved bits, and PTE control bits
+	tbit.nz p9,p0=r20,IA64_ISR_NA_BIT	// is non-access bit on?
+	;;
+	andcm r18=0x10,r18	// bit 4=~address-bit(61)
+	cmp.ne p8,p0=r0,r23
+(p9)	cmp.eq.or.andcm p6,p7=IA64_ISR_CODE_LFETCH,r22	// check isr.code field
+(p8)	br.cond.spnt page_fault
+
+	dep r21=-1,r21,IA64_PSR_ED_BIT,1
+	or r19=r19,r17		// insert PTE control bits into r19
+	;;
+	or r19=r19,r18		// set bit 4 (uncached) if the access was to region 6
+(p6)	mov cr.ipsr=r21
+	;;
+(p7)	itc.d r19		// insert the TLB entry
+	mov pr=r31,-1
+	rfi
+END(alt_dtlb_miss)
+
+	.org ia64_ivt+0x1400
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x1400 Entry 5 (size 64 bundles) Data nested TLB (6,45)
+ENTRY(nested_dtlb_miss)
+	/*
+	 * In the absence of kernel bugs, we get here when the virtually mapped linear
+	 * page table is accessed non-speculatively (e.g., in the Dirty-bit, Instruction
+	 * Access-bit, or Data Access-bit faults).  If the DTLB entry for the virtual page
+	 * table is missing, a nested TLB miss fault is triggered and control is
+	 * transferred to this point.  When this happens, we lookup the pte for the
+	 * faulting address by walking the page table in physical mode and return to the
+	 * continuation point passed in register r30 (or call page_fault if the address is
+	 * not mapped).
+	 *
+	 * Input:	r16:	faulting address
+	 *		r29:	saved b0
+	 *		r30:	continuation address
+	 *		r31:	saved pr
+	 *
+	 * Output:	r17:	physical address of L3 PTE of faulting address
+	 *		r29:	saved b0
+	 *		r30:	continuation address
+	 *		r31:	saved pr
+	 *
+	 * Clobbered:	b0, r18, r19, r21, psr.dt (cleared)
+	 */
+	rsm psr.dt				// switch to using physical data addressing
+	mov r19=IA64_KR(PT_BASE)		// get the page table base address
+	shl r21=r16,3				// shift bit 60 into sign bit
+	;;
+	shr.u r17=r16,61			// get the region number into r17
+	;;
+	cmp.eq p6,p7=5,r17			// is faulting address in region 5?
+	shr.u r18=r16,PGDIR_SHIFT		// get bits 33-63 of faulting address
+	;;
+(p7)	dep r17=r17,r19,(PAGE_SHIFT-3),3	// put region number bits in place
+
+	srlz.d
+	LOAD_PHYSICAL(p6, r19, swapper_pg_dir)	// region 5 is rooted at swapper_pg_dir
+
+	.pred.rel "mutex", p6, p7
+(p6)	shr.u r21=r21,PGDIR_SHIFT+PAGE_SHIFT
+(p7)	shr.u r21=r21,PGDIR_SHIFT+PAGE_SHIFT-3
+	;;
+(p6)	dep r17=r18,r19,3,(PAGE_SHIFT-3)	// r17=PTA + IFA(33,42)*8
+(p7)	dep r17=r18,r17,3,(PAGE_SHIFT-6)	// r17=PTA + (((IFA(61,63) << 7) | IFA(33,39))*8)
+	cmp.eq p7,p6=0,r21			// unused address bits all zeroes?
+	shr.u r18=r16,PMD_SHIFT			// shift L2 index into position
+	;;
+	ld8 r17=[r17]				// fetch the L1 entry (may be 0)
+	;;
+(p7)	cmp.eq p6,p7=r17,r0			// was L1 entry NULL?
+	dep r17=r18,r17,3,(PAGE_SHIFT-3)	// compute address of L2 page table entry
+	;;
+(p7)	ld8 r17=[r17]				// fetch the L2 entry (may be 0)
+	shr.u r19=r16,PAGE_SHIFT		// shift L3 index into position
+	;;
+(p7)	cmp.eq.or.andcm p6,p7=r17,r0		// was L2 entry NULL?
+	dep r17=r19,r17,3,(PAGE_SHIFT-3)	// compute address of L3 page table entry
+(p6)	br.cond.spnt page_fault
+	mov b0=r30
+	br.sptk.many b0				// return to continuation point
+END(nested_dtlb_miss)
+
+	.org ia64_ivt+0x1800
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x1800 Entry 6 (size 64 bundles) Instruction Key Miss (24)
+ENTRY(ikey_miss)
+	DBG_FAULT(6)
+	FAULT(6)
+END(ikey_miss)
+
+	//-----------------------------------------------------------------------------------
+	// call do_page_fault (predicates are in r31, psr.dt may be off, r16 is faulting address)
+ENTRY(page_fault)
+	ssm psr.dt
+	;;
+	srlz.i
+	;;
+	SAVE_MIN_WITH_COVER
+	alloc r15=ar.pfs,0,0,3,0
+	mov out0=cr.ifa
+	mov out1=cr.isr
+	adds r3=8,r2				// set up second base pointer
+	;;
+	ssm psr.ic | PSR_DEFAULT_BITS
+	;;
+	srlz.i					// guarantee that interruption collectin is on
+	;;
+(p15)	ssm psr.i				// restore psr.i
+	movl r14=ia64_leave_kernel
+	;;
+	SAVE_REST
+	mov rp=r14
+	;;
+	adds out2=16,r12			// out2 = pointer to pt_regs
+	br.call.sptk.many b6=ia64_do_page_fault	// ignore return address
+END(page_fault)
+
+	.org ia64_ivt+0x1c00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x1c00 Entry 7 (size 64 bundles) Data Key Miss (12,51)
+ENTRY(dkey_miss)
+	DBG_FAULT(7)
+	FAULT(7)
+END(dkey_miss)
+
+	.org ia64_ivt+0x2000
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x2000 Entry 8 (size 64 bundles) Dirty-bit (54)
+ENTRY(dirty_bit)
+	DBG_FAULT(8)
+	/*
+	 * What we do here is to simply turn on the dirty bit in the PTE.  We need to
+	 * update both the page-table and the TLB entry.  To efficiently access the PTE,
+	 * we address it through the virtual page table.  Most likely, the TLB entry for
+	 * the relevant virtual page table page is still present in the TLB so we can
+	 * normally do this without additional TLB misses.  In case the necessary virtual
+	 * page table TLB entry isn't present, we take a nested TLB miss hit where we look
+	 * up the physical address of the L3 PTE and then continue at label 1 below.
+	 */
+	mov r16=cr.ifa				// get the address that caused the fault
+	movl r30=1f				// load continuation point in case of nested fault
+	;;
+	thash r17=r16				// compute virtual address of L3 PTE
+	mov r29=b0				// save b0 in case of nested fault
+	mov r31=pr				// save pr
+#ifdef CONFIG_SMP
+	mov r28=ar.ccv				// save ar.ccv
+	;;
+1:	ld8 r18=[r17]
+	;;					// avoid RAW on r18
+	mov ar.ccv=r18				// set compare value for cmpxchg
+	or r25=_PAGE_D|_PAGE_A,r18		// set the dirty and accessed bits
+	;;
+	cmpxchg8.acq r26=[r17],r25,ar.ccv
+	mov r24=PAGE_SHIFT<<2
+	;;
+	cmp.eq p6,p7=r26,r18
+	;;
+(p6)	itc.d r25				// install updated PTE
+	;;
+	/*
+	 * Tell the assemblers dependency-violation checker that the above "itc" instructions
+	 * cannot possibly affect the following loads:
+	 */
+	dv_serialize_data
+
+	ld8 r18=[r17]				// read PTE again
+	;;
+	cmp.eq p6,p7=r18,r25			// is it same as the newly installed
+	;;
+(p7)	ptc.l r16,r24
+	mov b0=r29				// restore b0
+	mov ar.ccv=r28
+#else
+	;;
+1:	ld8 r18=[r17]
+	;;					// avoid RAW on r18
+	or r18=_PAGE_D|_PAGE_A,r18		// set the dirty and accessed bits
+	mov b0=r29				// restore b0
+	;;
+	st8 [r17]=r18				// store back updated PTE
+	itc.d r18				// install updated PTE
+#endif
+	mov pr=r31,-1				// restore pr
+	rfi
+END(dirty_bit)
+
+	.org ia64_ivt+0x2400
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x2400 Entry 9 (size 64 bundles) Instruction Access-bit (27)
+ENTRY(iaccess_bit)
+	DBG_FAULT(9)
+	// Like Entry 8, except for instruction access
+	mov r16=cr.ifa				// get the address that caused the fault
+	movl r30=1f				// load continuation point in case of nested fault
+	mov r31=pr				// save predicates
+#ifdef CONFIG_ITANIUM
+	/*
+	 * Erratum 10 (IFA may contain incorrect address) has "NoFix" status.
+	 */
+	mov r17=cr.ipsr
+	;;
+	mov r18=cr.iip
+	tbit.z p6,p0=r17,IA64_PSR_IS_BIT	// IA64 instruction set?
+	;;
+(p6)	mov r16=r18				// if so, use cr.iip instead of cr.ifa
+#endif /* CONFIG_ITANIUM */
+	;;
+	thash r17=r16				// compute virtual address of L3 PTE
+	mov r29=b0				// save b0 in case of nested fault)
+#ifdef CONFIG_SMP
+	mov r28=ar.ccv				// save ar.ccv
+	;;
+1:	ld8 r18=[r17]
+	;;
+	mov ar.ccv=r18				// set compare value for cmpxchg
+	or r25=_PAGE_A,r18			// set the accessed bit
+	;;
+	cmpxchg8.acq r26=[r17],r25,ar.ccv
+	mov r24=PAGE_SHIFT<<2
+	;;
+	cmp.eq p6,p7=r26,r18
+	;;
+(p6)	itc.i r25				// install updated PTE
+	;;
+	/*
+	 * Tell the assemblers dependency-violation checker that the above "itc" instructions
+	 * cannot possibly affect the following loads:
+	 */
+	dv_serialize_data
+
+	ld8 r18=[r17]				// read PTE again
+	;;
+	cmp.eq p6,p7=r18,r25			// is it same as the newly installed
+	;;
+(p7)	ptc.l r16,r24
+	mov b0=r29				// restore b0
+	mov ar.ccv=r28
+#else /* !CONFIG_SMP */
+	;;
+1:	ld8 r18=[r17]
+	;;
+	or r18=_PAGE_A,r18			// set the accessed bit
+	mov b0=r29				// restore b0
+	;;
+	st8 [r17]=r18				// store back updated PTE
+	itc.i r18				// install updated PTE
+#endif /* !CONFIG_SMP */
+	mov pr=r31,-1
+	rfi
+END(iaccess_bit)
+
+	.org ia64_ivt+0x2800
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x2800 Entry 10 (size 64 bundles) Data Access-bit (15,55)
+ENTRY(daccess_bit)
+	DBG_FAULT(10)
+	// Like Entry 8, except for data access
+	mov r16=cr.ifa				// get the address that caused the fault
+	movl r30=1f				// load continuation point in case of nested fault
+	;;
+	thash r17=r16				// compute virtual address of L3 PTE
+	mov r31=pr
+	mov r29=b0				// save b0 in case of nested fault)
+#ifdef CONFIG_SMP
+	mov r28=ar.ccv				// save ar.ccv
+	;;
+1:	ld8 r18=[r17]
+	;;					// avoid RAW on r18
+	mov ar.ccv=r18				// set compare value for cmpxchg
+	or r25=_PAGE_A,r18			// set the dirty bit
+	;;
+	cmpxchg8.acq r26=[r17],r25,ar.ccv
+	mov r24=PAGE_SHIFT<<2
+	;;
+	cmp.eq p6,p7=r26,r18
+	;;
+(p6)	itc.d r25				// install updated PTE
+	/*
+	 * Tell the assemblers dependency-violation checker that the above "itc" instructions
+	 * cannot possibly affect the following loads:
+	 */
+	dv_serialize_data
+	;;
+	ld8 r18=[r17]				// read PTE again
+	;;
+	cmp.eq p6,p7=r18,r25			// is it same as the newly installed
+	;;
+(p7)	ptc.l r16,r24
+	mov ar.ccv=r28
+#else
+	;;
+1:	ld8 r18=[r17]
+	;;					// avoid RAW on r18
+	or r18=_PAGE_A,r18			// set the accessed bit
+	;;
+	st8 [r17]=r18				// store back updated PTE
+	itc.d r18				// install updated PTE
+#endif
+	mov b0=r29				// restore b0
+	mov pr=r31,-1
+	rfi
+END(daccess_bit)
+
+	.org ia64_ivt+0x2c00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x2c00 Entry 11 (size 64 bundles) Break instruction (33)
+ENTRY(break_fault)
+	/*
+	 * The streamlined system call entry/exit paths only save/restore the initial part
+	 * of pt_regs.  This implies that the callers of system-calls must adhere to the
+	 * normal procedure calling conventions.
+	 *
+	 *   Registers to be saved & restored:
+	 *	CR registers: cr.ipsr, cr.iip, cr.ifs
+	 *	AR registers: ar.unat, ar.pfs, ar.rsc, ar.rnat, ar.bspstore, ar.fpsr
+	 * 	others: pr, b0, b6, loadrs, r1, r11, r12, r13, r15
+	 *   Registers to be restored only:
+	 * 	r8-r11: output value from the system call.
+	 *
+	 * During system call exit, scratch registers (including r15) are modified/cleared
+	 * to prevent leaking bits from kernel to user level.
+	 */
+	DBG_FAULT(11)
+	mov r16=IA64_KR(CURRENT)		// r16 = current task; 12 cycle read lat.
+	mov r17=cr.iim
+	mov r18=__IA64_BREAK_SYSCALL
+	mov r21=ar.fpsr
+	mov r29=cr.ipsr
+	mov r19=b6
+	mov r25=ar.unat
+	mov r27=ar.rsc
+	mov r26=ar.pfs
+	mov r28=cr.iip
+	mov r31=pr				// prepare to save predicates
+	mov r20=r1
+	;;
+	adds r16=IA64_TASK_THREAD_ON_USTACK_OFFSET,r16
+	cmp.eq p0,p7=r18,r17			// is this a system call? (p7 <- false, if so)
+(p7)	br.cond.spnt non_syscall
+	;;
+	ld1 r17=[r16]				// load current->thread.on_ustack flag
+	st1 [r16]=r0				// clear current->thread.on_ustack flag
+	add r1=-IA64_TASK_THREAD_ON_USTACK_OFFSET,r16	// set r1 for MINSTATE_START_SAVE_MIN_VIRT
+	;;
+	invala
+
+	/* adjust return address so we skip over the break instruction: */
+
+	extr.u r8=r29,41,2			// extract ei field from cr.ipsr
+	;;
+	cmp.eq p6,p7=2,r8			// isr.ei==2?
+	mov r2=r1				// setup r2 for ia64_syscall_setup
+	;;
+(p6)	mov r8=0				// clear ei to 0
+(p6)	adds r28=16,r28				// switch cr.iip to next bundle cr.ipsr.ei wrapped
+(p7)	adds r8=1,r8				// increment ei to next slot
+	;;
+	cmp.eq pKStk,pUStk=r0,r17		// are we in kernel mode already?
+	dep r29=r8,r29,41,2			// insert new ei into cr.ipsr
+	;;
+
+	// switch from user to kernel RBS:
+	MINSTATE_START_SAVE_MIN_VIRT
+	br.call.sptk.many b7=ia64_syscall_setup
+	;;
+	MINSTATE_END_SAVE_MIN_VIRT		// switch to bank 1
+	ssm psr.ic | PSR_DEFAULT_BITS
+	;;
+	srlz.i					// guarantee that interruption collection is on
+	mov r3=NR_syscalls - 1
+	;;
+(p15)	ssm psr.i				// restore psr.i
+	// p10==true means out registers are more than 8 or r15's Nat is true
+(p10)	br.cond.spnt.many ia64_ret_from_syscall
+	;;
+	movl r16=sys_call_table
+
+	adds r15=-1024,r15			// r15 contains the syscall number---subtract 1024
+	movl r2=ia64_ret_from_syscall
+	;;
+	shladd r20=r15,3,r16			// r20 = sys_call_table + 8*(syscall-1024)
+	cmp.leu p6,p7=r15,r3			// (syscall > 0 && syscall < 1024 + NR_syscalls) ?
+	mov rp=r2				// set the real return addr
+	;;
+(p6)	ld8 r20=[r20]				// load address of syscall entry point
+(p7)	movl r20=sys_ni_syscall
+
+	add r2=TI_FLAGS+IA64_TASK_SIZE,r13
+	;;
+	ld4 r2=[r2]				// r2 = current_thread_info()->flags
+	;;
+	and r2=_TIF_SYSCALL_TRACEAUDIT,r2	// mask trace or audit
+	;;
+	cmp.eq p8,p0=r2,r0
+	mov b6=r20
+	;;
+(p8)	br.call.sptk.many b6=b6			// ignore this return addr
+	br.cond.sptk ia64_trace_syscall
+	// NOT REACHED
+END(break_fault)
+
+	.org ia64_ivt+0x3000
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x3000 Entry 12 (size 64 bundles) External Interrupt (4)
+ENTRY(interrupt)
+	DBG_FAULT(12)
+	mov r31=pr		// prepare to save predicates
+	;;
+	SAVE_MIN_WITH_COVER	// uses r31; defines r2 and r3
+	ssm psr.ic | PSR_DEFAULT_BITS
+	;;
+	adds r3=8,r2		// set up second base pointer for SAVE_REST
+	srlz.i			// ensure everybody knows psr.ic is back on
+	;;
+	SAVE_REST
+	;;
+	alloc r14=ar.pfs,0,0,2,0 // must be first in an insn group
+	mov out0=cr.ivr		// pass cr.ivr as first arg
+	add out1=16,sp		// pass pointer to pt_regs as second arg
+	;;
+	srlz.d			// make sure we see the effect of cr.ivr
+	movl r14=ia64_leave_kernel
+	;;
+	mov rp=r14
+	br.call.sptk.many b6=ia64_handle_irq
+END(interrupt)
+
+	.org ia64_ivt+0x3400
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x3400 Entry 13 (size 64 bundles) Reserved
+	DBG_FAULT(13)
+	FAULT(13)
+
+	.org ia64_ivt+0x3800
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x3800 Entry 14 (size 64 bundles) Reserved
+	DBG_FAULT(14)
+	FAULT(14)
+
+	/*
+	 * There is no particular reason for this code to be here, other than that
+	 * there happens to be space here that would go unused otherwise.  If this
+	 * fault ever gets "unreserved", simply moved the following code to a more
+	 * suitable spot...
+	 *
+	 * ia64_syscall_setup() is a separate subroutine so that it can
+	 *	allocate stacked registers so it can safely demine any
+	 *	potential NaT values from the input registers.
+	 *
+	 * On entry:
+	 *	- executing on bank 0 or bank 1 register set (doesn't matter)
+	 *	-  r1: stack pointer
+	 *	-  r2: current task pointer
+	 *	-  r3: preserved
+	 *	- r11: original contents (saved ar.pfs to be saved)
+	 *	- r12: original contents (sp to be saved)
+	 *	- r13: original contents (tp to be saved)
+	 *	- r15: original contents (syscall # to be saved)
+	 *	- r18: saved bsp (after switching to kernel stack)
+	 *	- r19: saved b6
+	 *	- r20: saved r1 (gp)
+	 *	- r21: saved ar.fpsr
+	 *	- r22: kernel's register backing store base (krbs_base)
+	 *	- r23: saved ar.bspstore
+	 *	- r24: saved ar.rnat
+	 *	- r25: saved ar.unat
+	 *	- r26: saved ar.pfs
+	 *	- r27: saved ar.rsc
+	 *	- r28: saved cr.iip
+	 *	- r29: saved cr.ipsr
+	 *	- r31: saved pr
+	 *	-  b0: original contents (to be saved)
+	 * On exit:
+	 *	- executing on bank 1 registers
+	 *	- psr.ic enabled, interrupts restored
+	 *	-  p10: TRUE if syscall is invoked with more than 8 out
+	 *		registers or r15's Nat is true
+	 *	-  r1: kernel's gp
+	 *	-  r3: preserved (same as on entry)
+	 *	-  r8: -EINVAL if p10 is true
+	 *	- r12: points to kernel stack
+	 *	- r13: points to current task
+	 *	- p15: TRUE if interrupts need to be re-enabled
+	 *	- ar.fpsr: set to kernel settings
+	 */
+GLOBAL_ENTRY(ia64_syscall_setup)
+#if PT(B6) != 0
+# error This code assumes that b6 is the first field in pt_regs.
+#endif
+	st8 [r1]=r19				// save b6
+	add r16=PT(CR_IPSR),r1			// initialize first base pointer
+	add r17=PT(R11),r1			// initialize second base pointer
+	;;
+	alloc r19=ar.pfs,8,0,0,0		// ensure in0-in7 are writable
+	st8 [r16]=r29,PT(AR_PFS)-PT(CR_IPSR)	// save cr.ipsr
+	tnat.nz p8,p0=in0
+
+	st8.spill [r17]=r11,PT(CR_IIP)-PT(R11)	// save r11
+	tnat.nz p9,p0=in1
+(pKStk)	mov r18=r0				// make sure r18 isn't NaT
+	;;
+
+	st8 [r16]=r26,PT(CR_IFS)-PT(AR_PFS)	// save ar.pfs
+	st8 [r17]=r28,PT(AR_UNAT)-PT(CR_IIP)	// save cr.iip
+	mov r28=b0				// save b0 (2 cyc)
+	;;
+
+	st8 [r17]=r25,PT(AR_RSC)-PT(AR_UNAT)	// save ar.unat
+	dep r19=0,r19,38,26			// clear all bits but 0..37 [I0]
+(p8)	mov in0=-1
+	;;
+
+	st8 [r16]=r19,PT(AR_RNAT)-PT(CR_IFS)	// store ar.pfs.pfm in cr.ifs
+	extr.u r11=r19,7,7	// I0		// get sol of ar.pfs
+	and r8=0x7f,r19		// A		// get sof of ar.pfs
+
+	st8 [r17]=r27,PT(AR_BSPSTORE)-PT(AR_RSC)// save ar.rsc
+	tbit.nz p15,p0=r29,IA64_PSR_I_BIT // I0
+(p9)	mov in1=-1
+	;;
+
+(pUStk) sub r18=r18,r22				// r18=RSE.ndirty*8
+	tnat.nz p10,p0=in2
+	add r11=8,r11
+	;;
+(pKStk) adds r16=PT(PR)-PT(AR_RNAT),r16		// skip over ar_rnat field
+(pKStk) adds r17=PT(B0)-PT(AR_BSPSTORE),r17	// skip over ar_bspstore field
+	tnat.nz p11,p0=in3
+	;;
+(p10)	mov in2=-1
+	tnat.nz p12,p0=in4				// [I0]
+(p11)	mov in3=-1
+	;;
+(pUStk) st8 [r16]=r24,PT(PR)-PT(AR_RNAT)	// save ar.rnat
+(pUStk) st8 [r17]=r23,PT(B0)-PT(AR_BSPSTORE)	// save ar.bspstore
+	shl r18=r18,16				// compute ar.rsc to be used for "loadrs"
+	;;
+	st8 [r16]=r31,PT(LOADRS)-PT(PR)		// save predicates
+	st8 [r17]=r28,PT(R1)-PT(B0)		// save b0
+	tnat.nz p13,p0=in5				// [I0]
+	;;
+	st8 [r16]=r18,PT(R12)-PT(LOADRS)	// save ar.rsc value for "loadrs"
+	st8.spill [r17]=r20,PT(R13)-PT(R1)	// save original r1
+(p12)	mov in4=-1
+	;;
+
+.mem.offset 0,0; st8.spill [r16]=r12,PT(AR_FPSR)-PT(R12)	// save r12
+.mem.offset 8,0; st8.spill [r17]=r13,PT(R15)-PT(R13)		// save r13
+(p13)	mov in5=-1
+	;;
+	st8 [r16]=r21,PT(R8)-PT(AR_FPSR)	// save ar.fpsr
+	tnat.nz p14,p0=in6
+	cmp.lt p10,p9=r11,r8	// frame size can't be more than local+8
+	;;
+	stf8 [r16]=f1		// ensure pt_regs.r8 != 0 (see handle_syscall_error)
+(p9)	tnat.nz p10,p0=r15
+	adds r12=-16,r1		// switch to kernel memory stack (with 16 bytes of scratch)
+
+	st8.spill [r17]=r15			// save r15
+	tnat.nz p8,p0=in7
+	nop.i 0
+
+	mov r13=r2				// establish `current'
+	movl r1=__gp				// establish kernel global pointer
+	;;
+(p14)	mov in6=-1
+(p8)	mov in7=-1
+	nop.i 0
+
+	cmp.eq pSys,pNonSys=r0,r0		// set pSys=1, pNonSys=0
+	movl r17=FPSR_DEFAULT
+	;;
+	mov.m ar.fpsr=r17			// set ar.fpsr to kernel default value
+(p10)	mov r8=-EINVAL
+	br.ret.sptk.many b7
+END(ia64_syscall_setup)
+
+	.org ia64_ivt+0x3c00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x3c00 Entry 15 (size 64 bundles) Reserved
+	DBG_FAULT(15)
+	FAULT(15)
+
+	/*
+	 * Squatting in this space ...
+	 *
+	 * This special case dispatcher for illegal operation faults allows preserved
+	 * registers to be modified through a callback function (asm only) that is handed
+	 * back from the fault handler in r8. Up to three arguments can be passed to the
+	 * callback function by returning an aggregate with the callback as its first
+	 * element, followed by the arguments.
+	 */
+ENTRY(dispatch_illegal_op_fault)
+	.prologue
+	.body
+	SAVE_MIN_WITH_COVER
+	ssm psr.ic | PSR_DEFAULT_BITS
+	;;
+	srlz.i		// guarantee that interruption collection is on
+	;;
+(p15)	ssm psr.i	// restore psr.i
+	adds r3=8,r2	// set up second base pointer for SAVE_REST
+	;;
+	alloc r14=ar.pfs,0,0,1,0	// must be first in insn group
+	mov out0=ar.ec
+	;;
+	SAVE_REST
+	PT_REGS_UNWIND_INFO(0)
+	;;
+	br.call.sptk.many rp=ia64_illegal_op_fault
+.ret0:	;;
+	alloc r14=ar.pfs,0,0,3,0	// must be first in insn group
+	mov out0=r9
+	mov out1=r10
+	mov out2=r11
+	movl r15=ia64_leave_kernel
+	;;
+	mov rp=r15
+	mov b6=r8
+	;;
+	cmp.ne p6,p0=0,r8
+(p6)	br.call.dpnt.many b6=b6		// call returns to ia64_leave_kernel
+	br.sptk.many ia64_leave_kernel
+END(dispatch_illegal_op_fault)
+
+	.org ia64_ivt+0x4000
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x4000 Entry 16 (size 64 bundles) Reserved
+	DBG_FAULT(16)
+	FAULT(16)
+
+	.org ia64_ivt+0x4400
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x4400 Entry 17 (size 64 bundles) Reserved
+	DBG_FAULT(17)
+	FAULT(17)
+
+ENTRY(non_syscall)
+	SAVE_MIN_WITH_COVER
+
+	// There is no particular reason for this code to be here, other than that
+	// there happens to be space here that would go unused otherwise.  If this
+	// fault ever gets "unreserved", simply moved the following code to a more
+	// suitable spot...
+
+	alloc r14=ar.pfs,0,0,2,0
+	mov out0=cr.iim
+	add out1=16,sp
+	adds r3=8,r2			// set up second base pointer for SAVE_REST
+
+	ssm psr.ic | PSR_DEFAULT_BITS
+	;;
+	srlz.i				// guarantee that interruption collection is on
+	;;
+(p15)	ssm psr.i			// restore psr.i
+	movl r15=ia64_leave_kernel
+	;;
+	SAVE_REST
+	mov rp=r15
+	;;
+	br.call.sptk.many b6=ia64_bad_break	// avoid WAW on CFM and ignore return addr
+END(non_syscall)
+
+	.org ia64_ivt+0x4800
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x4800 Entry 18 (size 64 bundles) Reserved
+	DBG_FAULT(18)
+	FAULT(18)
+
+	/*
+	 * There is no particular reason for this code to be here, other than that
+	 * there happens to be space here that would go unused otherwise.  If this
+	 * fault ever gets "unreserved", simply moved the following code to a more
+	 * suitable spot...
+	 */
+
+ENTRY(dispatch_unaligned_handler)
+	SAVE_MIN_WITH_COVER
+	;;
+	alloc r14=ar.pfs,0,0,2,0		// now it's safe (must be first in insn group!)
+	mov out0=cr.ifa
+	adds out1=16,sp
+
+	ssm psr.ic | PSR_DEFAULT_BITS
+	;;
+	srlz.i					// guarantee that interruption collection is on
+	;;
+(p15)	ssm psr.i				// restore psr.i
+	adds r3=8,r2				// set up second base pointer
+	;;
+	SAVE_REST
+	movl r14=ia64_leave_kernel
+	;;
+	mov rp=r14
+	br.sptk.many ia64_prepare_handle_unaligned
+END(dispatch_unaligned_handler)
+
+	.org ia64_ivt+0x4c00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x4c00 Entry 19 (size 64 bundles) Reserved
+	DBG_FAULT(19)
+	FAULT(19)
+
+	/*
+	 * There is no particular reason for this code to be here, other than that
+	 * there happens to be space here that would go unused otherwise.  If this
+	 * fault ever gets "unreserved", simply moved the following code to a more
+	 * suitable spot...
+	 */
+
+ENTRY(dispatch_to_fault_handler)
+	/*
+	 * Input:
+	 *	psr.ic:	off
+	 *	r19:	fault vector number (e.g., 24 for General Exception)
+	 *	r31:	contains saved predicates (pr)
+	 */
+	SAVE_MIN_WITH_COVER_R19
+	alloc r14=ar.pfs,0,0,5,0
+	mov out0=r15
+	mov out1=cr.isr
+	mov out2=cr.ifa
+	mov out3=cr.iim
+	mov out4=cr.itir
+	;;
+	ssm psr.ic | PSR_DEFAULT_BITS
+	;;
+	srlz.i					// guarantee that interruption collection is on
+	;;
+(p15)	ssm psr.i				// restore psr.i
+	adds r3=8,r2				// set up second base pointer for SAVE_REST
+	;;
+	SAVE_REST
+	movl r14=ia64_leave_kernel
+	;;
+	mov rp=r14
+	br.call.sptk.many b6=ia64_fault
+END(dispatch_to_fault_handler)
+
+//
+// --- End of long entries, Beginning of short entries
+//
+
+	.org ia64_ivt+0x5000
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x5000 Entry 20 (size 16 bundles) Page Not Present (10,22,49)
+ENTRY(page_not_present)
+	DBG_FAULT(20)
+	mov r16=cr.ifa
+	rsm psr.dt
+	/*
+	 * The Linux page fault handler doesn't expect non-present pages to be in
+	 * the TLB.  Flush the existing entry now, so we meet that expectation.
+	 */
+	mov r17=PAGE_SHIFT<<2
+	;;
+	ptc.l r16,r17
+	;;
+	mov r31=pr
+	srlz.d
+	br.sptk.many page_fault
+END(page_not_present)
+
+	.org ia64_ivt+0x5100
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x5100 Entry 21 (size 16 bundles) Key Permission (13,25,52)
+ENTRY(key_permission)
+	DBG_FAULT(21)
+	mov r16=cr.ifa
+	rsm psr.dt
+	mov r31=pr
+	;;
+	srlz.d
+	br.sptk.many page_fault
+END(key_permission)
+
+	.org ia64_ivt+0x5200
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x5200 Entry 22 (size 16 bundles) Instruction Access Rights (26)
+ENTRY(iaccess_rights)
+	DBG_FAULT(22)
+	mov r16=cr.ifa
+	rsm psr.dt
+	mov r31=pr
+	;;
+	srlz.d
+	br.sptk.many page_fault
+END(iaccess_rights)
+
+	.org ia64_ivt+0x5300
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x5300 Entry 23 (size 16 bundles) Data Access Rights (14,53)
+ENTRY(daccess_rights)
+	DBG_FAULT(23)
+	mov r16=cr.ifa
+	rsm psr.dt
+	mov r31=pr
+	;;
+	srlz.d
+	br.sptk.many page_fault
+END(daccess_rights)
+
+	.org ia64_ivt+0x5400
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x5400 Entry 24 (size 16 bundles) General Exception (5,32,34,36,38,39)
+ENTRY(general_exception)
+	DBG_FAULT(24)
+	mov r16=cr.isr
+	mov r31=pr
+	;;
+	cmp4.eq p6,p0=0,r16
+(p6)	br.sptk.many dispatch_illegal_op_fault
+	;;
+	mov r19=24		// fault number
+	br.sptk.many dispatch_to_fault_handler
+END(general_exception)
+
+	.org ia64_ivt+0x5500
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x5500 Entry 25 (size 16 bundles) Disabled FP-Register (35)
+ENTRY(disabled_fp_reg)
+	DBG_FAULT(25)
+	rsm psr.dfh		// ensure we can access fph
+	;;
+	srlz.d
+	mov r31=pr
+	mov r19=25
+	br.sptk.many dispatch_to_fault_handler
+END(disabled_fp_reg)
+
+	.org ia64_ivt+0x5600
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x5600 Entry 26 (size 16 bundles) Nat Consumption (11,23,37,50)
+ENTRY(nat_consumption)
+	DBG_FAULT(26)
+	FAULT(26)
+END(nat_consumption)
+
+	.org ia64_ivt+0x5700
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x5700 Entry 27 (size 16 bundles) Speculation (40)
+ENTRY(speculation_vector)
+	DBG_FAULT(27)
+	/*
+	 * A [f]chk.[as] instruction needs to take the branch to the recovery code but
+	 * this part of the architecture is not implemented in hardware on some CPUs, such
+	 * as Itanium.  Thus, in general we need to emulate the behavior.  IIM contains
+	 * the relative target (not yet sign extended).  So after sign extending it we
+	 * simply add it to IIP.  We also need to reset the EI field of the IPSR to zero,
+	 * i.e., the slot to restart into.
+	 *
+	 * cr.imm contains zero_ext(imm21)
+	 */
+	mov r18=cr.iim
+	;;
+	mov r17=cr.iip
+	shl r18=r18,43			// put sign bit in position (43=64-21)
+	;;
+
+	mov r16=cr.ipsr
+	shr r18=r18,39			// sign extend (39=43-4)
+	;;
+
+	add r17=r17,r18			// now add the offset
+	;;
+	mov cr.iip=r17
+	dep r16=0,r16,41,2		// clear EI
+	;;
+
+	mov cr.ipsr=r16
+	;;
+
+	rfi				// and go back
+END(speculation_vector)
+
+	.org ia64_ivt+0x5800
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x5800 Entry 28 (size 16 bundles) Reserved
+	DBG_FAULT(28)
+	FAULT(28)
+
+	.org ia64_ivt+0x5900
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x5900 Entry 29 (size 16 bundles) Debug (16,28,56)
+ENTRY(debug_vector)
+	DBG_FAULT(29)
+	FAULT(29)
+END(debug_vector)
+
+	.org ia64_ivt+0x5a00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x5a00 Entry 30 (size 16 bundles) Unaligned Reference (57)
+ENTRY(unaligned_access)
+	DBG_FAULT(30)
+	mov r16=cr.ipsr
+	mov r31=pr		// prepare to save predicates
+	;;
+	br.sptk.many dispatch_unaligned_handler
+END(unaligned_access)
+
+	.org ia64_ivt+0x5b00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x5b00 Entry 31 (size 16 bundles) Unsupported Data Reference (57)
+ENTRY(unsupported_data_reference)
+	DBG_FAULT(31)
+	FAULT(31)
+END(unsupported_data_reference)
+
+	.org ia64_ivt+0x5c00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x5c00 Entry 32 (size 16 bundles) Floating-Point Fault (64)
+ENTRY(floating_point_fault)
+	DBG_FAULT(32)
+	FAULT(32)
+END(floating_point_fault)
+
+	.org ia64_ivt+0x5d00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x5d00 Entry 33 (size 16 bundles) Floating Point Trap (66)
+ENTRY(floating_point_trap)
+	DBG_FAULT(33)
+	FAULT(33)
+END(floating_point_trap)
+
+	.org ia64_ivt+0x5e00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x5e00 Entry 34 (size 16 bundles) Lower Privilege Transfer Trap (66)
+ENTRY(lower_privilege_trap)
+	DBG_FAULT(34)
+	FAULT(34)
+END(lower_privilege_trap)
+
+	.org ia64_ivt+0x5f00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x5f00 Entry 35 (size 16 bundles) Taken Branch Trap (68)
+ENTRY(taken_branch_trap)
+	DBG_FAULT(35)
+	FAULT(35)
+END(taken_branch_trap)
+
+	.org ia64_ivt+0x6000
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x6000 Entry 36 (size 16 bundles) Single Step Trap (69)
+ENTRY(single_step_trap)
+	DBG_FAULT(36)
+	FAULT(36)
+END(single_step_trap)
+
+	.org ia64_ivt+0x6100
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x6100 Entry 37 (size 16 bundles) Reserved
+	DBG_FAULT(37)
+	FAULT(37)
+
+	.org ia64_ivt+0x6200
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x6200 Entry 38 (size 16 bundles) Reserved
+	DBG_FAULT(38)
+	FAULT(38)
+
+	.org ia64_ivt+0x6300
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x6300 Entry 39 (size 16 bundles) Reserved
+	DBG_FAULT(39)
+	FAULT(39)
+
+	.org ia64_ivt+0x6400
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x6400 Entry 40 (size 16 bundles) Reserved
+	DBG_FAULT(40)
+	FAULT(40)
+
+	.org ia64_ivt+0x6500
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x6500 Entry 41 (size 16 bundles) Reserved
+	DBG_FAULT(41)
+	FAULT(41)
+
+	.org ia64_ivt+0x6600
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x6600 Entry 42 (size 16 bundles) Reserved
+	DBG_FAULT(42)
+	FAULT(42)
+
+	.org ia64_ivt+0x6700
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x6700 Entry 43 (size 16 bundles) Reserved
+	DBG_FAULT(43)
+	FAULT(43)
+
+	.org ia64_ivt+0x6800
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x6800 Entry 44 (size 16 bundles) Reserved
+	DBG_FAULT(44)
+	FAULT(44)
+
+	.org ia64_ivt+0x6900
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x6900 Entry 45 (size 16 bundles) IA-32 Exeception (17,18,29,41,42,43,44,58,60,61,62,72,73,75,76,77)
+ENTRY(ia32_exception)
+	DBG_FAULT(45)
+	FAULT(45)
+END(ia32_exception)
+
+	.org ia64_ivt+0x6a00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x6a00 Entry 46 (size 16 bundles) IA-32 Intercept  (30,31,59,70,71)
+ENTRY(ia32_intercept)
+	DBG_FAULT(46)
+#ifdef	CONFIG_IA32_SUPPORT
+	mov r31=pr
+	mov r16=cr.isr
+	;;
+	extr.u r17=r16,16,8	// get ISR.code
+	mov r18=ar.eflag
+	mov r19=cr.iim		// old eflag value
+	;;
+	cmp.ne p6,p0=2,r17
+(p6)	br.cond.spnt 1f		// not a system flag fault
+	xor r16=r18,r19
+	;;
+	extr.u r17=r16,18,1	// get the eflags.ac bit
+	;;
+	cmp.eq p6,p0=0,r17
+(p6)	br.cond.spnt 1f		// eflags.ac bit didn't change
+	;;
+	mov pr=r31,-1		// restore predicate registers
+	rfi
+
+1:
+#endif	// CONFIG_IA32_SUPPORT
+	FAULT(46)
+END(ia32_intercept)
+
+	.org ia64_ivt+0x6b00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x6b00 Entry 47 (size 16 bundles) IA-32 Interrupt  (74)
+ENTRY(ia32_interrupt)
+	DBG_FAULT(47)
+#ifdef CONFIG_IA32_SUPPORT
+	mov r31=pr
+	br.sptk.many dispatch_to_ia32_handler
+#else
+	FAULT(47)
+#endif
+END(ia32_interrupt)
+
+	.org ia64_ivt+0x6c00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x6c00 Entry 48 (size 16 bundles) Reserved
+	DBG_FAULT(48)
+	FAULT(48)
+
+	.org ia64_ivt+0x6d00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x6d00 Entry 49 (size 16 bundles) Reserved
+	DBG_FAULT(49)
+	FAULT(49)
+
+	.org ia64_ivt+0x6e00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x6e00 Entry 50 (size 16 bundles) Reserved
+	DBG_FAULT(50)
+	FAULT(50)
+
+	.org ia64_ivt+0x6f00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x6f00 Entry 51 (size 16 bundles) Reserved
+	DBG_FAULT(51)
+	FAULT(51)
+
+	.org ia64_ivt+0x7000
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x7000 Entry 52 (size 16 bundles) Reserved
+	DBG_FAULT(52)
+	FAULT(52)
+
+	.org ia64_ivt+0x7100
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x7100 Entry 53 (size 16 bundles) Reserved
+	DBG_FAULT(53)
+	FAULT(53)
+
+	.org ia64_ivt+0x7200
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x7200 Entry 54 (size 16 bundles) Reserved
+	DBG_FAULT(54)
+	FAULT(54)
+
+	.org ia64_ivt+0x7300
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x7300 Entry 55 (size 16 bundles) Reserved
+	DBG_FAULT(55)
+	FAULT(55)
+
+	.org ia64_ivt+0x7400
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x7400 Entry 56 (size 16 bundles) Reserved
+	DBG_FAULT(56)
+	FAULT(56)
+
+	.org ia64_ivt+0x7500
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x7500 Entry 57 (size 16 bundles) Reserved
+	DBG_FAULT(57)
+	FAULT(57)
+
+	.org ia64_ivt+0x7600
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x7600 Entry 58 (size 16 bundles) Reserved
+	DBG_FAULT(58)
+	FAULT(58)
+
+	.org ia64_ivt+0x7700
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x7700 Entry 59 (size 16 bundles) Reserved
+	DBG_FAULT(59)
+	FAULT(59)
+
+	.org ia64_ivt+0x7800
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x7800 Entry 60 (size 16 bundles) Reserved
+	DBG_FAULT(60)
+	FAULT(60)
+
+	.org ia64_ivt+0x7900
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x7900 Entry 61 (size 16 bundles) Reserved
+	DBG_FAULT(61)
+	FAULT(61)
+
+	.org ia64_ivt+0x7a00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x7a00 Entry 62 (size 16 bundles) Reserved
+	DBG_FAULT(62)
+	FAULT(62)
+
+	.org ia64_ivt+0x7b00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x7b00 Entry 63 (size 16 bundles) Reserved
+	DBG_FAULT(63)
+	FAULT(63)
+
+	.org ia64_ivt+0x7c00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x7c00 Entry 64 (size 16 bundles) Reserved
+	DBG_FAULT(64)
+	FAULT(64)
+
+	.org ia64_ivt+0x7d00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x7d00 Entry 65 (size 16 bundles) Reserved
+	DBG_FAULT(65)
+	FAULT(65)
+
+	.org ia64_ivt+0x7e00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x7e00 Entry 66 (size 16 bundles) Reserved
+	DBG_FAULT(66)
+	FAULT(66)
+
+	.org ia64_ivt+0x7f00
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x7f00 Entry 67 (size 16 bundles) Reserved
+	DBG_FAULT(67)
+	FAULT(67)
+
+#ifdef CONFIG_IA32_SUPPORT
+
+	/*
+	 * There is no particular reason for this code to be here, other than that
+	 * there happens to be space here that would go unused otherwise.  If this
+	 * fault ever gets "unreserved", simply moved the following code to a more
+	 * suitable spot...
+	 */
+
+	// IA32 interrupt entry point
+
+ENTRY(dispatch_to_ia32_handler)
+	SAVE_MIN
+	;;
+	mov r14=cr.isr
+	ssm psr.ic | PSR_DEFAULT_BITS
+	;;
+	srlz.i					// guarantee that interruption collection is on
+	;;
+(p15)	ssm psr.i
+	adds r3=8,r2		// Base pointer for SAVE_REST
+	;;
+	SAVE_REST
+	;;
+	mov r15=0x80
+	shr r14=r14,16		// Get interrupt number
+	;;
+	cmp.ne p6,p0=r14,r15
+(p6)	br.call.dpnt.many b6=non_ia32_syscall
+
+	adds r14=IA64_PT_REGS_R8_OFFSET + 16,sp	// 16 byte hole per SW conventions
+	adds r15=IA64_PT_REGS_R1_OFFSET + 16,sp
+	;;
+	cmp.eq pSys,pNonSys=r0,r0 // set pSys=1, pNonSys=0
+	ld8 r8=[r14]		// get r8
+	;;
+	st8 [r15]=r8		// save original EAX in r1 (IA32 procs don't use the GP)
+	;;
+	alloc r15=ar.pfs,0,0,6,0	// must first in an insn group
+	;;
+	ld4 r8=[r14],8		// r8 == eax (syscall number)
+	mov r15=IA32_NR_syscalls
+	;;
+	cmp.ltu.unc p6,p7=r8,r15
+	ld4 out1=[r14],8	// r9 == ecx
+	;;
+	ld4 out2=[r14],8	// r10 == edx
+	;;
+	ld4 out0=[r14]		// r11 == ebx
+	adds r14=(IA64_PT_REGS_R13_OFFSET) + 16,sp
+	;;
+	ld4 out5=[r14],PT(R14)-PT(R13)	// r13 == ebp
+	;;
+	ld4 out3=[r14],PT(R15)-PT(R14)	// r14 == esi
+	adds r2=TI_FLAGS+IA64_TASK_SIZE,r13
+	;;
+	ld4 out4=[r14]		// r15 == edi
+	movl r16=ia32_syscall_table
+	;;
+(p6)	shladd r16=r8,3,r16	// force ni_syscall if not valid syscall number
+	ld4 r2=[r2]		// r2 = current_thread_info()->flags
+	;;
+	ld8 r16=[r16]
+	and r2=_TIF_SYSCALL_TRACEAUDIT,r2	// mask trace or audit
+	;;
+	mov b6=r16
+	movl r15=ia32_ret_from_syscall
+	cmp.eq p8,p0=r2,r0
+	;;
+	mov rp=r15
+(p8)	br.call.sptk.many b6=b6
+	br.cond.sptk ia32_trace_syscall
+
+non_ia32_syscall:
+	alloc r15=ar.pfs,0,0,2,0
+	mov out0=r14				// interrupt #
+	add out1=16,sp				// pointer to pt_regs
+	;;			// avoid WAW on CFM
+	br.call.sptk.many rp=ia32_bad_interrupt
+.ret1:	movl r15=ia64_leave_kernel
+	;;
+	mov rp=r15
+	br.ret.sptk.many rp
+END(dispatch_to_ia32_handler)
+
+#endif /* CONFIG_IA32_SUPPORT */