diff options
Diffstat (limited to 'arch/ia64/kernel/ivt.S')
| -rw-r--r-- | arch/ia64/kernel/ivt.S | 462 |
1 files changed, 231 insertions, 231 deletions
diff --git a/arch/ia64/kernel/ivt.S b/arch/ia64/kernel/ivt.S index 80b44ea052d..c39627df3cd 100644 --- a/arch/ia64/kernel/ivt.S +++ b/arch/ia64/kernel/ivt.S @@ -12,6 +12,14 @@ * * 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. @@ -102,13 +110,13 @@ ENTRY(vhpt_miss) * - 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 @@ -168,21 +176,21 @@ ENTRY(vhpt_miss) 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 /* @@ -192,7 +200,7 @@ ENTRY(vhpt_miss) */ 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 /* @@ -234,7 +242,7 @@ ENTRY(vhpt_miss) #endif mov pr=r31,-1 // restore predicate registers - rfi + RFI END(vhpt_miss) .org ia64_ivt+0x400 @@ -248,11 +256,11 @@ ENTRY(itlb_miss) * 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 @@ -261,7 +269,7 @@ ENTRY(itlb_miss) 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 /* @@ -278,7 +286,7 @@ ENTRY(itlb_miss) (p7) ptc.l r16,r20 #endif mov pr=r31,-1 - rfi + RFI END(itlb_miss) .org ia64_ivt+0x0800 @@ -292,11 +300,11 @@ ENTRY(dtlb_miss) * 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 @@ -305,7 +313,7 @@ dtlb_fault: 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 /* @@ -322,7 +330,7 @@ dtlb_fault: (p7) ptc.l r16,r20 #endif mov pr=r31,-1 - rfi + RFI END(dtlb_miss) .org ia64_ivt+0x0c00 @@ -330,9 +338,9 @@ END(dtlb_miss) // 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 ;; @@ -341,9 +349,9 @@ ENTRY(alt_itlb_miss) ;; 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 @@ -358,9 +366,9 @@ ENTRY(alt_itlb_miss) 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 @@ -368,11 +376,11 @@ END(alt_itlb_miss) // 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 ;; @@ -381,9 +389,9 @@ ENTRY(alt_dtlb_miss) ;; 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 @@ -402,7 +410,7 @@ ENTRY(alt_dtlb_miss) tbit.nz p9,p0=r20,IA64_ISR_NA_BIT // is non-access bit on? ;; (p10) sub r19=r19,r26 -(p10) mov cr.itir=r25 + 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 @@ -411,11 +419,11 @@ ENTRY(alt_dtlb_miss) dep r21=-1,r21,IA64_PSR_ED_BIT,1 ;; or r19=r19,r17 // insert PTE control bits into r19 -(p6) mov cr.ipsr=r21 + 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 @@ -444,10 +452,10 @@ ENTRY(nested_dtlb_miss) * * 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 @@ -507,33 +515,6 @@ ENTRY(ikey_miss) 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) @@ -556,10 +537,10 @@ ENTRY(dirty_bit) * 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 @@ -576,7 +557,7 @@ ENTRY(dirty_bit) ;; (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 @@ -602,7 +583,7 @@ ENTRY(dirty_bit) itc.d r18 // install updated PTE #endif mov pr=r31,-1 // restore pr - rfi + RFI END(dirty_bit) .org ia64_ivt+0x2400 @@ -611,22 +592,22 @@ END(dirty_bit) 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 @@ -642,7 +623,7 @@ ENTRY(iaccess_bit) ;; (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 @@ -668,7 +649,7 @@ ENTRY(iaccess_bit) itc.i r18 // install updated PTE #endif /* !CONFIG_SMP */ mov pr=r31,-1 - rfi + RFI END(iaccess_bit) .org ia64_ivt+0x2800 @@ -677,10 +658,10 @@ END(iaccess_bit) 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 @@ -697,7 +678,7 @@ ENTRY(daccess_bit) ;; (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: @@ -721,7 +702,7 @@ ENTRY(daccess_bit) #endif mov b0=r29 // restore b0 mov pr=r31,-1 - rfi + RFI END(daccess_bit) .org ia64_ivt+0x2c00 @@ -745,10 +726,10 @@ ENTRY(break_fault) */ 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 @@ -767,7 +748,7 @@ ENTRY(break_fault) 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 -> // @@ -864,18 +845,17 @@ ENTRY(break_fault) #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 @@ -895,27 +875,8 @@ END(break_fault) ///////////////////////////////////////////////////////////////////////////////////////// // 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 - ;; - MCA_RECOVER_RANGE(interrupt) - 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 @@ -978,6 +939,7 @@ END(interrupt) * - 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. @@ -1069,6 +1031,7 @@ GLOBAL_ENTRY(ia64_syscall_setup) (p10) mov r8=-EINVAL br.ret.sptk.many b7 END(ia64_syscall_setup) +#endif /* __IA64_ASM_PARAVIRTUALIZED_NATIVE */ .org ia64_ivt+0x3c00 ///////////////////////////////////////////////////////////////////////////////////////// @@ -1082,7 +1045,7 @@ END(ia64_syscall_setup) DBG_FAULT(16) FAULT(16) -#ifdef CONFIG_VIRT_CPU_ACCOUNTING +#if defined(CONFIG_VIRT_CPU_ACCOUNTING) && defined(__IA64_ASM_PARAVIRTUALIZED_NATIVE) /* * 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. @@ -1092,7 +1055,7 @@ END(ia64_syscall_setup) * account_sys_enter is called from SAVE_MIN* macros if accounting is * enabled and if the macro is entered from user mode. */ -ENTRY(account_sys_enter) +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 @@ -1123,110 +1086,18 @@ END(account_sys_enter) 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 // @@ -1236,8 +1107,8 @@ END(dispatch_to_fault_handler) // 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. @@ -1256,8 +1127,8 @@ END(page_not_present) // 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 @@ -1269,8 +1140,8 @@ END(key_permission) // 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 @@ -1282,8 +1153,8 @@ END(iaccess_rights) // 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 @@ -1295,7 +1166,7 @@ END(daccess_rights) // 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 @@ -1324,8 +1195,8 @@ END(disabled_fp_reg) 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} @@ -1335,10 +1206,10 @@ ENTRY(nat_consumption) 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 ;; @@ -1360,26 +1231,26 @@ ENTRY(speculation_vector) * * 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_FROM_IIP(r17) dep r16=0,r16,41,2 // clear EI ;; - mov cr.ipsr=r16 + MOV_FROM_IPSR(p0, r16) ;; - rfi // and go back + RFI END(speculation_vector) .org ia64_ivt+0x5800 @@ -1517,11 +1388,11 @@ ENTRY(ia32_intercept) DBG_FAULT(46) #ifdef CONFIG_IA32_SUPPORT mov r31=pr - mov r16=cr.isr + MOV_FROM_ISR(r16) ;; extr.u r17=r16,16,8 // get ISR.code mov r18=ar.eflag - mov r19=cr.iim // old eflag value + MOV_FROM_IIM(r19) // old eflag value ;; cmp.ne p6,p0=2,r17 (p6) br.cond.spnt 1f // not a system flag fault @@ -1533,7 +1404,7 @@ ENTRY(ia32_intercept) (p6) br.cond.spnt 1f // eflags.ac bit didn't change ;; mov pr=r31,-1 // restore predicate registers - rfi + RFI 1: #endif // CONFIG_IA32_SUPPORT @@ -1673,6 +1544,137 @@ END(ia32_interrupt) DBG_FAULT(67) FAULT(67) + //----------------------------------------------------------------------------------- + // 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... + + 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 + + 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 + ;; + SAVE_REST + mov rp=r15 + ;; + 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 + ;; + 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 + ;; + 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 + ;; + 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) + + /* + * 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_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 + ;; + SAVE_REST + movl r14=ia64_leave_kernel + ;; + 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) + ;; + SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r3, out0) + // guarantee that interruption collection is on + mov out0=r15 + ;; + SSM_PSR_I(p15, p15, r3) // 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) + /* * Squatting in this space ... * @@ -1686,11 +1688,10 @@ 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 + SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r3, r24) + // guarantee that interruption collection is on ;; -(p15) ssm psr.i // restore psr.i + SSM_PSR_I(p15, p15, r3) // 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 @@ -1729,12 +1730,11 @@ END(dispatch_illegal_op_fault) 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 + MOV_FROM_ISR(r14) + SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r3, r24) + // guarantee that interruption collection is on ;; -(p15) ssm psr.i + SSM_PSR_I(p15, p15, r3) adds r3=8,r2 // Base pointer for SAVE_REST ;; SAVE_REST |