*
* 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.
+ *
+ * Copyright (C) 2005 Hewlett-Packard Co
+ * Dan Magenheimer <dan.magenheimer@hp.com>
+ * Xen paravirtualization
+ * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
+ * VA Linux Systems Japan K.K.
+ * pv_ops.
+ * Yaozu (Eddie) Dong <eddie.dong@intel.com>
*/
/*
* This file defines the interruption vector table used by the CPU.
* 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/asm-offsets.h>
#include <asm/pgtable.h>
mov r19=n;; /* prepare to save predicates */ \
br.sptk.many dispatch_to_fault_handler
- .section .text.ivt,"ax"
+ .section .text..ivt,"ax"
.align 32768 // align on 32KB boundary
.global ia64_ivt
* - the faulting virtual address uses unimplemented address bits
* - the faulting virtual address has no valid page table mapping
*/
- mov r16=cr.ifa // get address that caused the TLB miss
+ MOV_FROM_IFA(r16) // get address that caused the TLB miss
#ifdef CONFIG_HUGETLB_PAGE
movl r18=PAGE_SHIFT
- mov r25=cr.itir
+ MOV_FROM_ITIR(r25)
#endif
;;
- rsm psr.dt // use physical addressing for data
+ 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
dep r21=r19,r20,3,(PAGE_SHIFT-3) // r21=pte_offset(pmd,addr)
;;
(p7) ld8 r18=[r21] // read *pte
- mov r19=cr.isr // cr.isr bit 32 tells us if this is an insn miss
+ MOV_FROM_ISR(r19) // cr.isr bit 32 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
+ MOV_FROM_IHA(r22) // 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
+ ITC_I_AND_D(p10, p11, r18, r24) // insert the instruction TLB entry and
+ // insert the data TLB entry
(p6) br.cond.spnt.many page_fault // handle bad address/page not present (page fault)
- mov cr.ifa=r22
+ MOV_TO_IFA(r22, r24)
#ifdef CONFIG_HUGETLB_PAGE
-(p8) mov cr.itir=r25 // change to default page-size for VHPT
+ MOV_TO_ITIR(p8, r25, r24) // change to default page-size for VHPT
#endif
/*
*/
adds r24=__DIRTY_BITS_NO_ED|_PAGE_PL_0|_PAGE_AR_RW,r23
;;
-(p7) itc.d r24
+ ITC_D(p7, r24, r25)
;;
#ifdef CONFIG_SMP
/*
#endif
mov pr=r31,-1 // restore predicate registers
- rfi
+ RFI
END(vhpt_miss)
.org ia64_ivt+0x400
* mode, walk the page table, and then re-execute the PTE read and
* go on normally after that.
*/
- mov r16=cr.ifa // get virtual address
+ MOV_FROM_IFA(r16) // get virtual address
mov r29=b0 // save b0
mov r31=pr // save predicates
.itlb_fault:
- mov r17=cr.iha // get virtual address of PTE
+ MOV_FROM_IHA(r17) // get virtual address of PTE
movl r30=1f // load nested fault continuation point
;;
1: ld8 r18=[r17] // read *pte
tbit.z p6,p0=r18,_PAGE_P_BIT // page present bit cleared?
(p6) br.cond.spnt page_fault
;;
- itc.i r18
+ ITC_I(p0, r18, r19)
;;
#ifdef CONFIG_SMP
/*
(p7) ptc.l r16,r20
#endif
mov pr=r31,-1
- rfi
+ RFI
END(itlb_miss)
.org ia64_ivt+0x0800
* mode, walk the page table, and then re-execute the PTE read and
* go on normally after that.
*/
- mov r16=cr.ifa // get virtual address
+ MOV_FROM_IFA(r16) // get virtual address
mov r29=b0 // save b0
mov r31=pr // save predicates
dtlb_fault:
- mov r17=cr.iha // get virtual address of PTE
+ MOV_FROM_IHA(r17) // get virtual address of PTE
movl r30=1f // load nested fault continuation point
;;
1: ld8 r18=[r17] // read *pte
tbit.z p6,p0=r18,_PAGE_P_BIT // page present bit cleared?
(p6) br.cond.spnt page_fault
;;
- itc.d r18
+ ITC_D(p0, r18, r19)
;;
#ifdef CONFIG_SMP
/*
(p7) ptc.l r16,r20
#endif
mov pr=r31,-1
- rfi
+ 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
+ MOV_FROM_IFA(r16) // get address that caused the TLB miss
movl r17=PAGE_KERNEL
- mov r21=cr.ipsr
+ MOV_FROM_IPSR(p0, r21)
movl r19=(((1 << IA64_MAX_PHYS_BITS) - 1) & ~0xfff)
mov r31=pr
;;
;;
cmp.gt p8,p0=6,r22 // user mode
;;
-(p8) thash r17=r16
+ THASH(p8, r17, r16, r23)
;;
-(p8) mov cr.iha=r17
+ MOV_TO_IHA(p8, r17, r23)
(p8) mov r29=b0 // save b0
(p8) br.cond.dptk .itlb_fault
#endif
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
+ ITC_I(p0, r19, r18) // insert the TLB entry
mov pr=r31,-1
- rfi
+ 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
+ MOV_FROM_IFA(r16) // get address that caused the TLB miss
movl r17=PAGE_KERNEL
- mov r20=cr.isr
+ MOV_FROM_ISR(r20)
movl r19=(((1 << IA64_MAX_PHYS_BITS) - 1) & ~0xfff)
- mov r21=cr.ipsr
+ MOV_FROM_IPSR(p0, r21)
mov r31=pr
+ mov r24=PERCPU_ADDR
;;
#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
+ THASH(p8, r17, r16, r25)
;;
-(p8) mov cr.iha=r17
+ MOV_TO_IHA(p8, r17, r25)
(p8) mov r29=b0 // save b0
(p8) br.cond.dptk dtlb_fault
#endif
+ cmp.ge p10,p11=r16,r24 // access to per_cpu_data?
+ tbit.z p12,p0=r16,61 // access to region 6?
+ mov r25=PERCPU_PAGE_SHIFT << 2
+ mov r26=PERCPU_PAGE_SIZE
+ nop.m 0
+ nop.b 0
+ ;;
+(p10) mov r19=IA64_KR(PER_CPU_DATA)
+(p11) and r19=r19,r16 // clear non-ppn fields
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)
+(p10) sub r19=r19,r26
+ MOV_TO_ITIR(p10, r25, r24)
cmp.ne p8,p0=r0,r23
(p9) cmp.eq.or.andcm p6,p7=IA64_ISR_CODE_LFETCH,r22 // check isr.code field
+(p12) dep r17=-1,r17,4,1 // set ma=UC for region 6 addr
(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
+ or r19=r19,r17 // insert PTE control bits into r19
+ MOV_TO_IPSR(p6, r21, r24)
;;
-(p7) itc.d r19 // insert the TLB entry
+ ITC_D(p7, r19, r18) // insert the TLB entry
mov pr=r31,-1
- rfi
+ RFI
END(alt_dtlb_miss)
.org ia64_ivt+0x1400
*
* Clobbered: b0, r18, r19, r21, r22, psr.dt (cleared)
*/
- rsm psr.dt // switch to using physical data addressing
+ 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
- mov r18=cr.itir
+ MOV_FROM_ITIR(r18)
;;
shr.u r17=r16,61 // get the region number into r17
extr.u r18=r18,2,6 // get the faulting page size
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)
* 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
+ MOV_FROM_IFA(r16) // 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
+ THASH(p0, r17, r16, r18) // compute virtual address of L3 PTE
mov r29=b0 // save b0 in case of nested fault
mov r31=pr // save pr
#ifdef CONFIG_SMP
;; // 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
+ tbit.z p7,p6 = r18,_PAGE_P_BIT // Check present bit
;;
- cmpxchg8.acq r26=[r17],r25,ar.ccv
+(p6) cmpxchg8.acq r26=[r17],r25,ar.ccv // Only update if page is present
mov r24=PAGE_SHIFT<<2
;;
- cmp.eq p6,p7=r26,r18
+(p6) cmp.eq p6,p7=r26,r18 // Only compare if page is present
;;
-(p6) itc.d r25 // install updated PTE
+ ITC_D(p6, r25, r18) // install updated PTE
;;
/*
* Tell the assemblers dependency-violation checker that the above "itc" instructions
mov b0=r29 // restore b0
;;
st8 [r17]=r18 // store back updated PTE
- itc.d r18 // install updated PTE
+ ITC_D(p0, r18, r16) // install updated PTE
#endif
mov pr=r31,-1 // restore pr
- rfi
+ RFI
END(dirty_bit)
.org ia64_ivt+0x2400
ENTRY(iaccess_bit)
DBG_FAULT(9)
// Like Entry 8, except for instruction access
- mov r16=cr.ifa // get the address that caused the fault
+ MOV_FROM_IFA(r16) // 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_FROM_IPSR(p0, r17)
;;
- mov r18=cr.iip
+ MOV_FROM_IIP(r18)
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
+ THASH(p0, r17, r16, r18) // 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
;;
mov ar.ccv=r18 // set compare value for cmpxchg
or r25=_PAGE_A,r18 // set the accessed bit
+ tbit.z p7,p6 = r18,_PAGE_P_BIT // Check present bit
;;
- cmpxchg8.acq r26=[r17],r25,ar.ccv
+(p6) cmpxchg8.acq r26=[r17],r25,ar.ccv // Only if page present
mov r24=PAGE_SHIFT<<2
;;
- cmp.eq p6,p7=r26,r18
+(p6) cmp.eq p6,p7=r26,r18 // Only if page present
;;
-(p6) itc.i r25 // install updated PTE
+ ITC_I(p6, r25, r26) // install updated PTE
;;
/*
* Tell the assemblers dependency-violation checker that the above "itc" instructions
mov b0=r29 // restore b0
;;
st8 [r17]=r18 // store back updated PTE
- itc.i r18 // install updated PTE
+ ITC_I(p0, r18, r16) // install updated PTE
#endif /* !CONFIG_SMP */
mov pr=r31,-1
- rfi
+ RFI
END(iaccess_bit)
.org ia64_ivt+0x2800
ENTRY(daccess_bit)
DBG_FAULT(10)
// Like Entry 8, except for data access
- mov r16=cr.ifa // get the address that caused the fault
+ MOV_FROM_IFA(r16) // 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
+ THASH(p0, r17, r16, r18) // compute virtual address of L3 PTE
mov r31=pr
mov r29=b0 // save b0 in case of nested fault)
#ifdef CONFIG_SMP
;; // avoid RAW on r18
mov ar.ccv=r18 // set compare value for cmpxchg
or r25=_PAGE_A,r18 // set the dirty bit
+ tbit.z p7,p6 = r18,_PAGE_P_BIT // Check present bit
;;
- cmpxchg8.acq r26=[r17],r25,ar.ccv
+(p6) cmpxchg8.acq r26=[r17],r25,ar.ccv // Only if page is present
mov r24=PAGE_SHIFT<<2
;;
- cmp.eq p6,p7=r26,r18
+(p6) cmp.eq p6,p7=r26,r18 // Only if page is present
;;
-(p6) itc.d r25 // install updated PTE
+ ITC_D(p6, r25, r26) // install updated PTE
/*
* Tell the assemblers dependency-violation checker that the above "itc" instructions
* cannot possibly affect the following loads:
or r18=_PAGE_A,r18 // set the accessed bit
;;
st8 [r17]=r18 // store back updated PTE
- itc.d r18 // install updated PTE
+ ITC_D(p0, r18, r16) // install updated PTE
#endif
mov b0=r29 // restore b0
mov pr=r31,-1
- rfi
+ RFI
END(daccess_bit)
.org ia64_ivt+0x2c00
*/
DBG_FAULT(11)
mov.m r16=IA64_KR(CURRENT) // M2 r16 <- current task (12 cyc)
- mov r29=cr.ipsr // M2 (12 cyc)
+ MOV_FROM_IPSR(p0, r29) // M2 (12 cyc)
mov r31=pr // I0 (2 cyc)
- mov r17=cr.iim // M2 (2 cyc)
+ MOV_FROM_IIM(r17) // M2 (2 cyc)
mov.m r27=ar.rsc // M2 (12 cyc)
mov r18=__IA64_BREAK_SYSCALL // A
nop.m 0
movl r30=sys_call_table // X
- mov r28=cr.iip // M2 (2 cyc)
+ MOV_FROM_IIP(r28) // M2 (2 cyc)
cmp.eq p0,p7=r18,r17 // I0 is this a system call?
(p7) br.cond.spnt non_syscall // B no ->
//
(p8) adds r28=16,r28 // A switch cr.iip to next bundle
(p9) adds r8=1,r8 // A increment ei to next slot
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+ ;;
+ mov b6=r30 // I0 setup syscall handler branch reg early
+#else
nop.i 0
;;
+#endif
mov.m r25=ar.unat // M2 (5 cyc)
dep r29=r8,r29,41,2 // I0 insert new ei into cr.ipsr
//
///////////////////////////////////////////////////////////////////////
st1 [r16]=r0 // M2|3 clear current->thread.on_ustack flag
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+ MOV_FROM_ITC(p0, p14, r30, r18) // M get cycle for accounting
+#else
mov b6=r30 // I0 setup syscall handler branch reg early
+#endif
cmp.eq pKStk,pUStk=r0,r17 // A were we on kernel stacks already?
and r9=_TIF_SYSCALL_TRACEAUDIT,r9 // A mask trace or audit
cmp.eq p14,p0=r9,r0 // A are syscalls being traced/audited?
br.call.sptk.many b7=ia64_syscall_setup // B
1:
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+ // mov.m r30=ar.itc is called in advance, and r13 is current
+ add r16=TI_AC_STAMP+IA64_TASK_SIZE,r13 // A
+ add r17=TI_AC_LEAVE+IA64_TASK_SIZE,r13 // A
+(pKStk) br.cond.spnt .skip_accounting // B unlikely skip
+ ;;
+ ld8 r18=[r16],TI_AC_STIME-TI_AC_STAMP // M get last stamp
+ ld8 r19=[r17],TI_AC_UTIME-TI_AC_LEAVE // M time at leave
+ ;;
+ ld8 r20=[r16],TI_AC_STAMP-TI_AC_STIME // M cumulated stime
+ ld8 r21=[r17] // M cumulated utime
+ sub r22=r19,r18 // A stime before leave
+ ;;
+ st8 [r16]=r30,TI_AC_STIME-TI_AC_STAMP // M update stamp
+ sub r18=r30,r19 // A elapsed time in user
+ ;;
+ add r20=r20,r22 // A sum stime
+ add r21=r21,r18 // A sum utime
+ ;;
+ st8 [r16]=r20 // M update stime
+ st8 [r17]=r21 // M update utime
+ ;;
+.skip_accounting:
+#endif
mov ar.rsc=0x3 // M2 set eager mode, pl 0, LE, loadrs=0
nop 0
- bsw.1 // B (6 cyc) regs are saved, switch to bank 1
+ BSW_1(r2, r14) // B (6 cyc) regs are saved, switch to bank 1
;;
- ssm psr.ic | PSR_DEFAULT_BITS // M2 now it's safe to re-enable intr.-collection
+ SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r3, r16) // M2 now it's safe to re-enable intr.-collection
+ // M0 ensure interruption collection is on
movl r3=ia64_ret_from_syscall // X
;;
-
- srlz.i // M0 ensure interruption collection is on
mov rp=r3 // I0 set the real return addr
(p10) br.cond.spnt.many ia64_ret_from_syscall // B return if bad call-frame or r15 is a NaT
-(p15) ssm psr.i // M2 restore psr.i
+ SSM_PSR_I(p15, p15, r16) // M2 restore psr.i
(p14) br.call.sptk.many b6=b6 // B invoke syscall-handker (ignore return addr)
br.cond.spnt.many ia64_trace_syscall // B do syscall-tracing thingamagic
// NOT REACHED
/////////////////////////////////////////////////////////////////////////////////////////
// 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
+ /* interrupt handler has become too big to fit this area. */
+ br.sptk.many __interrupt
END(interrupt)
.org ia64_ivt+0x3400
* - r27: saved ar.rsc
* - r28: saved cr.iip
* - r29: saved cr.ipsr
+ * - r30: ar.itc for accounting (don't touch)
* - r31: saved pr
* - b0: original contents (to be saved)
* On exit:
* - ar.fpsr: set to kernel settings
* - b6: preserved (same as on entry)
*/
+#ifdef __IA64_ASM_PARAVIRTUALIZED_NATIVE
GLOBAL_ENTRY(ia64_syscall_setup)
#if PT(B6) != 0
# error This code assumes that b6 is the first field in pt_regs.
(p10) mov r8=-EINVAL
br.ret.sptk.many b7
END(ia64_syscall_setup)
+#endif /* __IA64_ASM_PARAVIRTUALIZED_NATIVE */
.org ia64_ivt+0x3c00
/////////////////////////////////////////////////////////////////////////////////////////
DBG_FAULT(15)
FAULT(15)
+ .org ia64_ivt+0x4000
+/////////////////////////////////////////////////////////////////////////////////////////
+// 0x4000 Entry 16 (size 64 bundles) Reserved
+ DBG_FAULT(16)
+ FAULT(16)
+
+#if defined(CONFIG_VIRT_CPU_ACCOUNTING) && defined(__IA64_ASM_PARAVIRTUALIZED_NATIVE)
/*
- * Squatting in this space ...
+ * 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...
*
- * 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.
+ * account_sys_enter is called from SAVE_MIN* macros if accounting is
+ * enabled and if the macro is entered from user mode.
*/
-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
+GLOBAL_ENTRY(account_sys_enter)
+ // mov.m r20=ar.itc is called in advance, and r13 is current
+ add r16=TI_AC_STAMP+IA64_TASK_SIZE,r13
+ add r17=TI_AC_LEAVE+IA64_TASK_SIZE,r13
;;
-(p15) ssm psr.i // restore psr.i
- adds r3=8,r2 // set up second base pointer for SAVE_REST
+ ld8 r18=[r16],TI_AC_STIME-TI_AC_STAMP // time at last check in kernel
+ ld8 r19=[r17],TI_AC_UTIME-TI_AC_LEAVE // time at left from kernel
+ ;;
+ ld8 r23=[r16],TI_AC_STAMP-TI_AC_STIME // cumulated stime
+ ld8 r21=[r17] // cumulated utime
+ sub r22=r19,r18 // stime before leave kernel
;;
- 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)
+ st8 [r16]=r20,TI_AC_STIME-TI_AC_STAMP // update stamp
+ sub r18=r20,r19 // elapsed time in user mode
;;
- 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
+ add r23=r23,r22 // sum stime
+ add r21=r21,r18 // sum utime
;;
- mov rp=r15
- mov b6=r8
+ st8 [r16]=r23 // update stime
+ st8 [r17]=r21 // update utime
;;
- 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)
+ br.ret.sptk.many rp
+END(account_sys_enter)
+#endif
.org ia64_ivt+0x4400
/////////////////////////////////////////////////////////////////////////////////////////
DBG_FAULT(17)
FAULT(17)
-ENTRY(non_syscall)
- mov ar.rsc=r27 // restore ar.rsc before SAVE_MIN_WITH_COVER
- ;;
- 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
//
// 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
+ MOV_FROM_IFA(r16)
+ 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.
// 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_FROM_IFA(r16)
+ RSM_PSR_DT
mov r31=pr
;;
srlz.d
// 0x5200 Entry 22 (size 16 bundles) Instruction Access Rights (26)
ENTRY(iaccess_rights)
DBG_FAULT(22)
- mov r16=cr.ifa
- rsm psr.dt
+ MOV_FROM_IFA(r16)
+ RSM_PSR_DT
mov r31=pr
;;
srlz.d
// 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_FROM_IFA(r16)
+ RSM_PSR_DT
mov r31=pr
;;
srlz.d
// 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_FROM_ISR(r16)
mov r31=pr
;;
cmp4.eq p6,p0=0,r16
ENTRY(nat_consumption)
DBG_FAULT(26)
- mov r16=cr.ipsr
- mov r17=cr.isr
+ MOV_FROM_IPSR(p0, r16)
+ MOV_FROM_ISR(r17)
mov r31=pr // save PR
;;
and r18=0xf,r17 // r18 = cr.ipsr.code{3:0}
dep r16=-1,r16,IA64_PSR_ED_BIT,1
(p6) br.cond.spnt 1f // branch if (cr.ispr.na == 0 || cr.ipsr.code{3:0} != LFETCH)
;;
- mov cr.ipsr=r16 // set cr.ipsr.na
+ MOV_TO_IPSR(p0, r16, r18)
mov pr=r31,-1
;;
- rfi
+ RFI
1: mov pr=r31,-1
;;
*
* cr.imm contains zero_ext(imm21)
*/
- mov r18=cr.iim
+ MOV_FROM_IIM(r18)
;;
- mov r17=cr.iip
+ MOV_FROM_IIP(r17)
shl r18=r18,43 // put sign bit in position (43=64-21)
;;
- mov r16=cr.ipsr
+ MOV_FROM_IPSR(p0, r16)
shr r18=r18,39 // sign extend (39=43-4)
;;
add r17=r17,r18 // now add the offset
;;
- mov cr.iip=r17
+ MOV_TO_IIP(r17, r19)
dep r16=0,r16,41,2 // clear EI
;;
- mov cr.ipsr=r16
+ MOV_TO_IPSR(p0, r16, r19)
;;
- rfi // and go back
+ RFI
END(speculation_vector)
.org ia64_ivt+0x5800
// 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
// 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)
// 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
DBG_FAULT(67)
FAULT(67)
-#ifdef CONFIG_IA32_SUPPORT
+ //-----------------------------------------------------------------------------------
+ // call do_page_fault (predicates are in r31, psr.dt may be off, r16 is faulting address)
+ENTRY(page_fault)
+ SSM_PSR_DT_AND_SRLZ_I
+ ;;
+ SAVE_MIN_WITH_COVER
+ alloc r15=ar.pfs,0,0,3,0
+ MOV_FROM_IFA(out0)
+ MOV_FROM_ISR(out1)
+ SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r14, r3)
+ adds r3=8,r2 // set up second base pointer
+ SSM_PSR_I(p15, p15, r14) // 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)
+
+ENTRY(non_syscall)
+ mov ar.rsc=r27 // restore ar.rsc before SAVE_MIN_WITH_COVER
+ ;;
+ 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...
- */
+ // 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
+ alloc r14=ar.pfs,0,0,2,0
+ MOV_FROM_IIM(out0)
+ add out1=16,sp
+ adds r3=8,r2 // set up second base pointer for SAVE_REST
-ENTRY(dispatch_to_ia32_handler)
- SAVE_MIN
+ SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r15, r24)
+ // guarantee that interruption collection is on
+ SSM_PSR_I(p15, p15, r15) // restore psr.i
+ movl r15=ia64_leave_kernel
;;
- mov r14=cr.isr
- ssm psr.ic | PSR_DEFAULT_BITS
+ SAVE_REST
+ mov rp=r15
;;
- srlz.i // guarantee that interruption collection is on
+ br.call.sptk.many b6=ia64_bad_break // avoid WAW on CFM and ignore return addr
+END(non_syscall)
+
+ENTRY(__interrupt)
+ DBG_FAULT(12)
+ mov r31=pr // prepare to save predicates
;;
-(p15) ssm psr.i
- adds r3=8,r2 // Base pointer for SAVE_REST
+ SAVE_MIN_WITH_COVER // uses r31; defines r2 and r3
+ SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r3, r14)
+ // ensure everybody knows psr.ic is back on
+ adds r3=8,r2 // set up second 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
+ MCA_RECOVER_RANGE(interrupt)
+ alloc r14=ar.pfs,0,0,2,0 // must be first in an insn group
+ MOV_FROM_IVR(out0, r8) // pass cr.ivr as first arg
+ add out1=16,sp // pass pointer to pt_regs as second arg
;;
- cmp.eq pSys,pNonSys=r0,r0 // set pSys=1, pNonSys=0
- ld8 r8=[r14] // get r8
+ srlz.d // make sure we see the effect of cr.ivr
+ movl r14=ia64_leave_kernel
;;
- st8 [r15]=r8 // save original EAX in r1 (IA32 procs don't use the GP)
+ mov rp=r14
+ br.call.sptk.many b6=ia64_handle_irq
+END(__interrupt)
+
+ /*
+ * 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 r15=ar.pfs,0,0,6,0 // must first in an insn group
+ alloc r14=ar.pfs,0,0,2,0 // now it's safe (must be first in insn group!)
+ MOV_FROM_IFA(out0)
+ adds out1=16,sp
+
+ SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r3, r24)
+ // guarantee that interruption collection is on
+ SSM_PSR_I(p15, p15, r3) // restore psr.i
+ adds r3=8,r2 // set up second base pointer
;;
- ld4 r8=[r14],8 // r8 == eax (syscall number)
- mov r15=IA32_NR_syscalls
+ SAVE_REST
+ movl r14=ia64_leave_kernel
;;
- cmp.ltu.unc p6,p7=r8,r15
- ld4 out1=[r14],8 // r9 == ecx
+ mov rp=r14
+ br.sptk.many ia64_prepare_handle_unaligned
+END(dispatch_unaligned_handler)
+
+ /*
+ * 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_FROM_ISR(out1)
+ MOV_FROM_IFA(out2)
+ MOV_FROM_IIM(out3)
+ MOV_FROM_ITIR(out4)
;;
- ld4 out2=[r14],8 // r10 == edx
+ SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r3, out0)
+ // guarantee that interruption collection is on
+ mov out0=r15
;;
- ld4 out0=[r14] // r11 == ebx
- adds r14=(IA64_PT_REGS_R13_OFFSET) + 16,sp
+ SSM_PSR_I(p15, p15, r3) // restore psr.i
+ adds r3=8,r2 // set up second base pointer for SAVE_REST
;;
- ld4 out5=[r14],PT(R14)-PT(R13) // r13 == ebp
+ SAVE_REST
+ movl r14=ia64_leave_kernel
;;
- ld4 out3=[r14],PT(R15)-PT(R14) // r14 == esi
- adds r2=TI_FLAGS+IA64_TASK_SIZE,r13
+ mov rp=r14
+ br.call.sptk.many b6=ia64_fault
+END(dispatch_to_fault_handler)
+
+ /*
+ * 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_AND_DEFAULT_BITS_AND_SRLZ_I(r3, r24)
+ // guarantee that interruption collection is on
;;
- ld4 out4=[r14] // r15 == edi
- movl r16=ia32_syscall_table
+ SSM_PSR_I(p15, p15, r3) // restore psr.i
+ adds r3=8,r2 // set up second base pointer for SAVE_REST
;;
-(p6) shladd r16=r8,3,r16 // force ni_syscall if not valid syscall number
- ld4 r2=[r2] // r2 = current_thread_info()->flags
+ alloc r14=ar.pfs,0,0,1,0 // must be first in insn group
+ mov out0=ar.ec
;;
- ld8 r16=[r16]
- and r2=_TIF_SYSCALL_TRACEAUDIT,r2 // mask trace or audit
+ SAVE_REST
+ PT_REGS_UNWIND_INFO(0)
;;
- mov b6=r16
- movl r15=ia32_ret_from_syscall
- cmp.eq p8,p0=r2,r0
+ 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
-(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 b6=r8
;;
- mov rp=r15
- br.ret.sptk.many rp
-END(dispatch_to_ia32_handler)
-
-#endif /* CONFIG_IA32_SUPPORT */
+ 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)
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff