# HG changeset patch
# User Alex Williamson <alex.williamson@xxxxxx>
# Date 1180633058 21600
# Node ID 7476a0ea8ee4d21c083718d634d482e65ddb25ae
# Parent b1b80a14d0238436d997123a09547d6cd0431583
[IA64] Cleanup ivt.S
xen/ivt.S is full of #ifndef XEN conditionnal parts. However they are not
maintained and there is no reason to update with linux ivt.S (very very
different). To make the code more readable I remove the conditional parts.
Signed-off-by: Tristan Gingold <tgingold@xxxxxxx>
---
xen/arch/ia64/xen/ivt.S | 953 ------------------------------------------------
1 files changed, 953 deletions(-)
diff -r b1b80a14d023 -r 7476a0ea8ee4 xen/arch/ia64/xen/ivt.S
--- a/xen/arch/ia64/xen/ivt.S Thu May 31 11:25:46 2007 -0600
+++ b/xen/arch/ia64/xen/ivt.S Thu May 31 11:37:38 2007 -0600
@@ -1,9 +1,7 @@
-#ifdef XEN
#include <asm/debugger.h>
#include <asm/vhpt.h>
#include <public/arch-ia64.h>
#include <asm/config.h>
-#endif
/*
* arch/ia64/kernel/ivt.S
*
@@ -58,11 +56,7 @@
#include <asm/system.h>
#include <asm/thread_info.h>
#include <asm/unistd.h>
-#ifdef XEN
#include <xen/errno.h>
-#else
-#include <asm/errno.h>
-#endif
#if 1
# define PSR_DEFAULT_BITS psr.ac
@@ -110,144 +104,7 @@ ia64_ivt:
// 0x0000 Entry 0 (size 64 bundles) VHPT Translation (8,20,47)
ENTRY(vhpt_miss)
DBG_FAULT(0)
-#ifdef XEN
FAULT(0)
-#else
- /*
- * 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 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 zero?
- 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
-#endif
END(vhpt_miss)
.org ia64_ivt+0x400
@@ -255,7 +112,6 @@ END(vhpt_miss)
// 0x0400 Entry 1 (size 64 bundles) ITLB (21)
ENTRY(itlb_miss)
DBG_FAULT(1)
-#ifdef XEN
mov r16 = cr.ifa
mov r31 = pr
;;
@@ -273,7 +129,6 @@ ENTRY(itlb_miss)
#ifdef VHPT_GLOBAL
br.cond.sptk fast_tlb_miss_reflect
;;
-#endif
#endif
/*
* The ITLB handler accesses the L3 PTE via the virtually mapped linear
@@ -320,7 +175,6 @@ END(itlb_miss)
// 0x0800 Entry 2 (size 64 bundles) DTLB (9,48)
ENTRY(dtlb_miss)
DBG_FAULT(2)
-#ifdef XEN
mov r16=cr.ifa // get virtual address
mov r31=pr
;;
@@ -394,17 +248,6 @@ 2:
;;
#endif
mov r29=b0 // save b0
-#else
- /*
- * 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
-#endif
dtlb_fault:
mov r17=cr.iha // get virtual address of L3 PTE
movl r30=1f // load nested fault
@@ -441,7 +284,6 @@ END(dtlb_miss)
// 0x0c00 Entry 3 (size 64 bundles) Alt ITLB (19)
ENTRY(alt_itlb_miss)
DBG_FAULT(3)
-#ifdef XEN
mov r16=cr.ifa // get address that caused the TLB miss
mov r31=pr
;;
@@ -450,14 +292,6 @@ late_alt_itlb_miss:
movl r17=PAGE_KERNEL
movl r19=(((1 << IA64_MAX_PHYS_BITS) - 1) & ~0xfff)
;;
-#else
- 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
- ;;
-#endif
#ifdef CONFIG_DISABLE_VHPT
shr.u r22=r16,61 // get the region number into r21
;;
@@ -471,15 +305,9 @@ late_alt_itlb_miss:
#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
-#ifdef XEN
shr.u r18=r16,55 // move address bit 59 to bit 4
;;
and r18=0x10,r18 // bit 4=address-bit(59)
-#else
- shr.u r18=r16,57 // move address bit 61 to bit 4
- ;;
- andcm r18=0x10,r18 // bit 4=~address-bit(61)
-#endif
cmp.ne p8,p0=r0,r23 // psr.cpl != 0?
or r19=r17,r19 // insert PTE control bits into r19
;;
@@ -497,7 +325,6 @@ END(alt_itlb_miss)
// 0x1000 Entry 4 (size 64 bundles) Alt DTLB (7,46)
ENTRY(alt_dtlb_miss)
DBG_FAULT(4)
-#ifdef XEN
mov r16=cr.ifa // get address that caused the TLB miss
mov r31=pr
;;
@@ -507,7 +334,6 @@ late_alt_dtlb_miss:
mov r21=cr.ipsr
movl r19=(((1 << IA64_MAX_PHYS_BITS) - 1) & ~0xfff)
;;
-#endif
#ifdef CONFIG_DISABLE_VHPT
shr.u r22=r16,61 // get the region into r22
;;
@@ -522,25 +348,15 @@ late_alt_dtlb_miss:
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?
-#ifdef XEN
shr.u r18=r16,55 // move address bit 59 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?
;;
and r18=0x10,r18 // bit 4=address-bit(59)
-#else
- 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)
-#endif
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
-#ifdef XEN
;;
#ifdef CONFIG_VIRTUAL_FRAME_TABLE
shr r22=r16,56 // Test for the address of virtual frame_table
@@ -560,8 +376,6 @@ late_alt_dtlb_miss:
(p8) br.cond.sptk page_fault
;;
1:
-#endif
-
dep r21=-1,r21,IA64_PSR_ED_BIT,1
or r19=r19,r17 // insert PTE control bits into r19
;;
@@ -644,76 +458,9 @@ END(ia64_frametable_probe)
// 0x1400 Entry 5 (size 64 bundles) Data nested TLB (6,45)
ENTRY(nested_dtlb_miss)
DBG_FAULT(5)
-#ifdef XEN
mov b0=r30
br.sptk.many b0 // return to the continuation point
;;
-#else
- /*
- * 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
-#endif
END(nested_dtlb_miss)
.org ia64_ivt+0x1800
@@ -721,36 +468,22 @@ END(nested_dtlb_miss)
// 0x1800 Entry 6 (size 64 bundles) Instruction Key Miss (24)
ENTRY(ikey_miss)
DBG_FAULT(6)
-#ifdef XEN
FAULT_OR_REFLECT(6)
-#else
- FAULT(6)
-#endif
END(ikey_miss)
//----------------------------------------------------------------
// call do_page_fault (predicates are in r31, psr.dt may be off,
// r16 is faulting address)
-#ifdef XEN
GLOBAL_ENTRY(page_fault)
-#else
-ENTRY(page_fault)
-#endif
ssm psr.dt
;;
srlz.i
;;
SAVE_MIN_WITH_COVER
-#ifdef XEN
alloc r15=ar.pfs,0,0,4,0
mov out0=cr.ifa
mov out1=cr.isr
mov out3=cr.itir
-#else
- alloc r15=ar.pfs,0,0,3,0
- mov out0=cr.ifa
- mov out1=cr.isr
-#endif
adds r3=8,r2 // set up second base pointer
;;
ssm psr.ic | PSR_DEFAULT_BITS
@@ -773,11 +506,7 @@ END(page_fault)
// 0x1c00 Entry 7 (size 64 bundles) Data Key Miss (12,51)
ENTRY(dkey_miss)
DBG_FAULT(7)
-#ifdef XEN
FAULT_OR_REFLECT(7)
-#else
- FAULT(7)
-#endif
END(dkey_miss)
.org ia64_ivt+0x2000
@@ -785,7 +514,6 @@ END(dkey_miss)
// 0x2000 Entry 8 (size 64 bundles) Dirty-bit (54)
ENTRY(dirty_bit)
DBG_FAULT(8)
-#ifdef XEN
mov r20=cr.ipsr
mov r31=pr
;;
@@ -830,67 +558,6 @@ ENTRY(dirty_bit)
;;
mov rp=r14
br.call.sptk.many b6=ia64_shadow_fault
-#else
- /*
- * 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
-#endif
END(dirty_bit)
.org ia64_ivt+0x2400
@@ -898,75 +565,12 @@ END(dirty_bit)
// 0x2400 Entry 9 (size 64 bundles) Instruction Access-bit (27)
ENTRY(iaccess_bit)
DBG_FAULT(9)
-#ifdef XEN
mov r16=cr.isr
mov r17=cr.ifa
mov r31=pr
mov r19=9
mov r20=0x2400
br.sptk.many fast_access_reflect;;
-#else
- // 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
-#endif
END(iaccess_bit)
.org ia64_ivt+0x2800
@@ -974,7 +578,6 @@ END(iaccess_bit)
// 0x2800 Entry 10 (size 64 bundles) Data Access-bit (15,55)
ENTRY(daccess_bit)
DBG_FAULT(10)
-#ifdef XEN
mov r16=cr.isr
mov r17=cr.ifa
mov r31=pr
@@ -982,55 +585,6 @@ ENTRY(daccess_bit)
mov r20=0x2800
br.sptk.many fast_access_reflect
;;
-#else
- // 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
-#endif
END(daccess_bit)
.org ia64_ivt+0x2c00
@@ -1307,7 +861,6 @@ ENTRY(interrupt)
DBG_FAULT(12)
mov r31=pr // prepare to save predicates
;;
-#ifdef XEN
mov r30=cr.ivr // pass cr.ivr as first arg
// FIXME: this is a hack... use cpuinfo.ksoftirqd because its
// not used anywhere else and we need a place to stash ivr and
@@ -1326,7 +879,6 @@ ENTRY(interrupt)
;;
slow_interrupt:
mov rp=r29;;
-#endif
SAVE_MIN_WITH_COVER // uses r31; defines r2 and r3
ssm psr.ic | PSR_DEFAULT_BITS
;;
@@ -1336,17 +888,9 @@ slow_interrupt:
SAVE_REST
;;
alloc r14=ar.pfs,0,0,2,0 // must be first in an insn group
-#ifdef XEN
movl out0=THIS_CPU(cpu_info)+IA64_CPUINFO_KSOFTIRQD_OFFSET;;
ld8 out0=[out0];;
-#else
- mov out0=cr.ivr // pass cr.ivr as first arg
-#endif
add out1=16,sp // pass pointer to pt_regs as second arg
-#ifndef XEN
- ;;
- srlz.d // make sure we see the effect of cr.ivr
-#endif
movl r14=ia64_leave_kernel
;;
mov rp=r14
@@ -1359,7 +903,6 @@ END(interrupt)
DBG_FAULT(13)
FAULT(13)
-#ifdef XEN
// 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 move
@@ -1389,7 +932,6 @@ dispatch_break_fault_post_save:
// br.sptk.many ia64_prepare_handle_break // TODO: why commented out?
br.call.sptk.many b6=ia64_handle_break
END(dispatch_break_fault)
-#endif
.org ia64_ivt+0x3800
//////////////////////////////////////////////////////////////////////////
@@ -1397,7 +939,6 @@ END(dispatch_break_fault)
DBG_FAULT(14)
FAULT(14)
-#ifdef XEN
// this code segment is from 2.6.16.13
/*
@@ -1539,152 +1080,6 @@ GLOBAL_ENTRY(ia64_syscall_setup)
br.ret.sptk.many b7
END(ia64_syscall_setup)
-
-#else
- /*
- * 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 move
- * 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)
-#ifndef XEN
-#if PT(B6) != 0
-# error This code assumes that b6 is the first field in pt_regs.
-#endif
-#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)
-#endif /* XEN */
.org ia64_ivt+0x3c00
//////////////////////////////////////////////////////////////////////////
@@ -1692,47 +1087,6 @@ END(ia64_syscall_setup)
DBG_FAULT(15)
FAULT(15)
-#ifndef XEN
- /*
- * 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)
- 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
- ;;
- 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)
-#endif
.org ia64_ivt+0x4000
//////////////////////////////////////////////////////////////////////////
@@ -1740,7 +1094,6 @@ END(dispatch_illegal_op_fault)
DBG_FAULT(16)
FAULT(16)
-#ifdef XEN
// 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 move
@@ -1771,7 +1124,6 @@ ENTRY(dispatch_privop_fault)
// br.sptk.many ia64_prepare_handle_privop // TODO: why commented out?
br.call.sptk.many b6=ia64_handle_privop
END(dispatch_privop_fault)
-#endif
.org ia64_ivt+0x4400
@@ -1780,34 +1132,6 @@ END(dispatch_privop_fault)
DBG_FAULT(17)
FAULT(17)
-#ifndef XEN
-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 move
- // 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)
-#endif
.org ia64_ivt+0x4800
//////////////////////////////////////////////////////////////////////////
@@ -1815,37 +1139,6 @@ END(non_syscall)
DBG_FAULT(18)
FAULT(18)
-#ifndef XEN
- /*
- * 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 move
- * 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 // TODO: why commented out?
- br.call.sptk.many b6=ia64_handle_unaligned
-END(dispatch_unaligned_handler)
-#endif
.org ia64_ivt+0x4c00
//////////////////////////////////////////////////////////////////////////
@@ -1900,24 +1193,7 @@ END(dispatch_to_fault_handler)
// 0x5000 Entry 20 (size 16 bundles) Page Not Present (10,22,49)
ENTRY(page_not_present)
DBG_FAULT(20)
-#ifdef XEN
FAULT_OR_REFLECT(20)
-#else
- 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
-#endif
END(page_not_present)
.org ia64_ivt+0x5100
@@ -1925,16 +1201,7 @@ END(page_not_present)
// 0x5100 Entry 21 (size 16 bundles) Key Permission (13,25,52)
ENTRY(key_permission)
DBG_FAULT(21)
-#ifdef XEN
FAULT_OR_REFLECT(21)
-#else
- mov r16=cr.ifa
- rsm psr.dt
- mov r31=pr
- ;;
- srlz.d
- br.sptk.many page_fault
-#endif
END(key_permission)
.org ia64_ivt+0x5200
@@ -1942,16 +1209,7 @@ END(key_permission)
// 0x5200 Entry 22 (size 16 bundles) Instruction Access Rights (26)
ENTRY(iaccess_rights)
DBG_FAULT(22)
-#ifdef XEN
FAULT_OR_REFLECT(22)
-#else
- mov r16=cr.ifa
- rsm psr.dt
- mov r31=pr
- ;;
- srlz.d
- br.sptk.many page_fault
-#endif
END(iaccess_rights)
.org ia64_ivt+0x5300
@@ -1959,7 +1217,6 @@ END(iaccess_rights)
// 0x5300 Entry 23 (size 16 bundles) Data Access Rights (14,53)
ENTRY(daccess_rights)
DBG_FAULT(23)
-#ifdef XEN
mov r31=pr
;;
mov r16=cr.isr
@@ -1968,14 +1225,6 @@ ENTRY(daccess_rights)
movl r20=0x5300
br.sptk.many fast_access_reflect
;;
-#else
- mov r16=cr.ifa
- rsm psr.dt
- mov r31=pr
- ;;
- srlz.d
- br.sptk.many page_fault
-#endif
END(daccess_rights)
.org ia64_ivt+0x5400
@@ -1986,15 +1235,10 @@ ENTRY(general_exception)
mov r16=cr.isr
mov r31=pr
;;
-#ifdef XEN
cmp4.ge p6,p0=0x20,r16
(p6) br.sptk.many dispatch_privop_fault
;;
FAULT_OR_REFLECT(24)
-#else
- cmp4.eq p6,p0=0,r16
-(p6) br.sptk.many dispatch_illegal_op_fault
-#endif
;;
mov r19=24 // fault number
br.sptk.many dispatch_to_fault_handler
@@ -2005,7 +1249,6 @@ END(general_exception)
// 0x5500 Entry 25 (size 16 bundles) Disabled FP-Register (35)
ENTRY(disabled_fp_reg)
DBG_FAULT(25)
-#ifdef XEN
#if 0 // TODO: can this be removed?
mov r20=pr
movl r16=0x2000000000000000
@@ -2028,7 +1271,6 @@ ENTRY(disabled_fp_reg)
//floating_panic: // TODO: can this be removed?
// br.sptk.many floating_panic
;;
-#endif
rsm psr.dfh // ensure we can access fph
;;
srlz.d
@@ -2054,42 +1296,8 @@ END(nat_consumption)
// 0x5700 Entry 27 (size 16 bundles) Speculation (40)
ENTRY(speculation_vector)
DBG_FAULT(27)
-#ifdef XEN
// this probably need not reflect...
FAULT_OR_REFLECT(27)
-#else
- /*
- * 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
-#endif
END(speculation_vector)
.org ia64_ivt+0x5800
@@ -2115,14 +1323,7 @@ END(debug_vector)
// 0x5a00 Entry 30 (size 16 bundles) Unaligned Reference (57)
ENTRY(unaligned_access)
DBG_FAULT(30)
-#ifdef XEN
FAULT_OR_REFLECT(30)
-#else
- mov r16=cr.ipsr
- mov r31=pr // prepare to save predicates
- ;;
- br.sptk.many dispatch_unaligned_handler
-#endif
END(unaligned_access)
.org ia64_ivt+0x5b00
@@ -2130,11 +1331,7 @@ END(unaligned_access)
// 0x5b00 Entry 31 (size 16 bundles) Unsupported Data Reference (57)
ENTRY(unsupported_data_reference)
DBG_FAULT(31)
-#ifdef XEN
FAULT_OR_REFLECT(31)
-#else
- FAULT(31)
-#endif
END(unsupported_data_reference)
.org ia64_ivt+0x5c00
@@ -2142,11 +1339,7 @@ END(unsupported_data_reference)
// 0x5c00 Entry 32 (size 16 bundles) Floating-Point Fault (64)
ENTRY(floating_point_fault)
DBG_FAULT(32)
-#ifdef XEN
FAULT_OR_REFLECT(32)
-#else
- FAULT(32)
-#endif
END(floating_point_fault)
.org ia64_ivt+0x5d00
@@ -2154,11 +1347,7 @@ END(floating_point_fault)
// 0x5d00 Entry 33 (size 16 bundles) Floating Point Trap (66)
ENTRY(floating_point_trap)
DBG_FAULT(33)
-#ifdef XEN
FAULT_OR_REFLECT(33)
-#else
- FAULT(33)
-#endif
END(floating_point_trap)
.org ia64_ivt+0x5e00
@@ -2166,11 +1355,7 @@ END(floating_point_trap)
// 0x5e00 Entry 34 (size 16 bundles) Lower Privilege Transfer Trap (66)
ENTRY(lower_privilege_trap)
DBG_FAULT(34)
-#ifdef XEN
FAULT_OR_REFLECT(34)
-#else
- FAULT(34)
-#endif
END(lower_privilege_trap)
.org ia64_ivt+0x5f00
@@ -2178,11 +1363,7 @@ END(lower_privilege_trap)
// 0x5f00 Entry 35 (size 16 bundles) Taken Branch Trap (68)
ENTRY(taken_branch_trap)
DBG_FAULT(35)
-#ifdef XEN
FAULT_OR_REFLECT(35)
-#else
- FAULT(35)
-#endif
END(taken_branch_trap)
.org ia64_ivt+0x6000
@@ -2190,11 +1371,7 @@ END(taken_branch_trap)
// 0x6000 Entry 36 (size 16 bundles) Single Step Trap (69)
ENTRY(single_step_trap)
DBG_FAULT(36)
-#ifdef XEN
FAULT_OR_REFLECT(36)
-#else
- FAULT(36)
-#endif
END(single_step_trap)
.org ia64_ivt+0x6100
@@ -2252,11 +1429,7 @@ END(single_step_trap)
// 73,75,76,77)
ENTRY(ia32_exception)
DBG_FAULT(45)
-#ifdef XEN
FAULT_OR_REFLECT(45)
-#else
- FAULT(45)
-#endif
END(ia32_exception)
.org ia64_ivt+0x6a00
@@ -2264,33 +1437,7 @@ END(ia32_exception)
// 0x6a00 Entry 46 (size 16 bundles) IA-32 Intercept (30,31,59,70,71)
ENTRY(ia32_intercept)
DBG_FAULT(46)
-#ifdef XEN
FAULT_OR_REFLECT(46)
-#else
-#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)
-#endif
END(ia32_intercept)
.org ia64_ivt+0x6b00
@@ -2298,16 +1445,7 @@ END(ia32_intercept)
// 0x6b00 Entry 47 (size 16 bundles) IA-32 Interrupt (74)
ENTRY(ia32_interrupt)
DBG_FAULT(47)
-#ifdef XEN
FAULT_OR_REFLECT(47)
-#else
-#ifdef CONFIG_IA32_SUPPORT
- mov r31=pr
- br.sptk.many dispatch_to_ia32_handler
-#else
- FAULT(47)
-#endif
-#endif
END(ia32_interrupt)
.org ia64_ivt+0x6c00
@@ -2430,7 +1568,6 @@ END(ia32_interrupt)
DBG_FAULT(67)
FAULT(67)
-#ifdef XEN
.org ia64_ivt+0x8000
GLOBAL_ENTRY(dispatch_reflection)
/*
@@ -2472,93 +1609,3 @@ GLOBAL_ENTRY(dispatch_slow_hyperprivop)
;;
br.sptk.many dispatch_break_fault_post_save
END(dispatch_slow_hyperprivop)
-#endif
-
-#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 move
- * 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 be 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 */
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