forked from Minki/linux
bde4e4ee9f
Verify we really are taking a data access exception trap, at TL1, from one of the window spill/fill handlers. Else call a new function, data_access_exception_tl1, to log the error. Signed-off-by: David S. Miller <davem@davemloft.net>
1791 lines
45 KiB
ArmAsm
1791 lines
45 KiB
ArmAsm
/* $Id: entry.S,v 1.144 2002/02/09 19:49:30 davem Exp $
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* arch/sparc64/kernel/entry.S: Sparc64 trap low-level entry points.
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*
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* Copyright (C) 1995,1997 David S. Miller (davem@caip.rutgers.edu)
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* Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
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* Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
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* Copyright (C) 1996,98,99 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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*/
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#include <linux/config.h>
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#include <linux/errno.h>
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#include <asm/head.h>
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#include <asm/asi.h>
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#include <asm/smp.h>
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#include <asm/ptrace.h>
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#include <asm/page.h>
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#include <asm/signal.h>
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#include <asm/pgtable.h>
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#include <asm/processor.h>
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#include <asm/visasm.h>
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#include <asm/estate.h>
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#include <asm/auxio.h>
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#define curptr g6
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#define NR_SYSCALLS 284 /* Each OS is different... */
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.text
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.align 32
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.globl sparc64_vpte_patchme1
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.globl sparc64_vpte_patchme2
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/*
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* On a second level vpte miss, check whether the original fault is to the OBP
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* range (note that this is only possible for instruction miss, data misses to
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* obp range do not use vpte). If so, go back directly to the faulting address.
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* This is because we want to read the tpc, otherwise we have no way of knowing
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* the 8k aligned faulting address if we are using >8k kernel pagesize. This
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* also ensures no vpte range addresses are dropped into tlb while obp is
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* executing (see inherit_locked_prom_mappings() rant).
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*/
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sparc64_vpte_nucleus:
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/* Load 0xf0000000, which is LOW_OBP_ADDRESS. */
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mov 0xf, %g5
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sllx %g5, 28, %g5
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/* Is addr >= LOW_OBP_ADDRESS? */
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cmp %g4, %g5
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blu,pn %xcc, sparc64_vpte_patchme1
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mov 0x1, %g5
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/* Load 0x100000000, which is HI_OBP_ADDRESS. */
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sllx %g5, 32, %g5
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/* Is addr < HI_OBP_ADDRESS? */
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cmp %g4, %g5
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blu,pn %xcc, obp_iaddr_patch
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nop
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/* These two instructions are patched by paginig_init(). */
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sparc64_vpte_patchme1:
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sethi %hi(0), %g5
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sparc64_vpte_patchme2:
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or %g5, %lo(0), %g5
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/* With kernel PGD in %g5, branch back into dtlb_backend. */
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ba,pt %xcc, sparc64_kpte_continue
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andn %g1, 0x3, %g1 /* Finish PMD offset adjustment. */
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vpte_noent:
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/* Restore previous TAG_ACCESS, %g5 is zero, and we will
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* skip over the trap instruction so that the top level
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* TLB miss handler will thing this %g5 value is just an
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* invalid PTE, thus branching to full fault processing.
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*/
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mov TLB_SFSR, %g1
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stxa %g4, [%g1 + %g1] ASI_DMMU
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done
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.globl obp_iaddr_patch
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obp_iaddr_patch:
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/* These two instructions patched by inherit_prom_mappings(). */
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sethi %hi(0), %g5
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or %g5, %lo(0), %g5
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/* Behave as if we are at TL0. */
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wrpr %g0, 1, %tl
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rdpr %tpc, %g4 /* Find original faulting iaddr */
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srlx %g4, 13, %g4 /* Throw out context bits */
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sllx %g4, 13, %g4 /* g4 has vpn + ctx0 now */
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/* Restore previous TAG_ACCESS. */
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mov TLB_SFSR, %g1
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stxa %g4, [%g1 + %g1] ASI_IMMU
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/* Get PMD offset. */
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srlx %g4, 23, %g6
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and %g6, 0x7ff, %g6
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sllx %g6, 2, %g6
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/* Load PMD, is it valid? */
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lduwa [%g5 + %g6] ASI_PHYS_USE_EC, %g5
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brz,pn %g5, longpath
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sllx %g5, 11, %g5
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/* Get PTE offset. */
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srlx %g4, 13, %g6
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and %g6, 0x3ff, %g6
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sllx %g6, 3, %g6
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/* Load PTE. */
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ldxa [%g5 + %g6] ASI_PHYS_USE_EC, %g5
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brgez,pn %g5, longpath
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nop
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/* TLB load and return from trap. */
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stxa %g5, [%g0] ASI_ITLB_DATA_IN
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retry
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.globl obp_daddr_patch
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obp_daddr_patch:
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/* These two instructions patched by inherit_prom_mappings(). */
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sethi %hi(0), %g5
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or %g5, %lo(0), %g5
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/* Get PMD offset. */
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srlx %g4, 23, %g6
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and %g6, 0x7ff, %g6
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sllx %g6, 2, %g6
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/* Load PMD, is it valid? */
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lduwa [%g5 + %g6] ASI_PHYS_USE_EC, %g5
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brz,pn %g5, longpath
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sllx %g5, 11, %g5
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/* Get PTE offset. */
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srlx %g4, 13, %g6
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and %g6, 0x3ff, %g6
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sllx %g6, 3, %g6
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/* Load PTE. */
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ldxa [%g5 + %g6] ASI_PHYS_USE_EC, %g5
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brgez,pn %g5, longpath
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nop
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/* TLB load and return from trap. */
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stxa %g5, [%g0] ASI_DTLB_DATA_IN
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retry
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/*
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* On a first level data miss, check whether this is to the OBP range (note
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* that such accesses can be made by prom, as well as by kernel using
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* prom_getproperty on "address"), and if so, do not use vpte access ...
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* rather, use information saved during inherit_prom_mappings() using 8k
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* pagesize.
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*/
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kvmap:
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/* Load 0xf0000000, which is LOW_OBP_ADDRESS. */
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mov 0xf, %g5
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sllx %g5, 28, %g5
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/* Is addr >= LOW_OBP_ADDRESS? */
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cmp %g4, %g5
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blu,pn %xcc, vmalloc_addr
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mov 0x1, %g5
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/* Load 0x100000000, which is HI_OBP_ADDRESS. */
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sllx %g5, 32, %g5
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/* Is addr < HI_OBP_ADDRESS? */
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cmp %g4, %g5
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blu,pn %xcc, obp_daddr_patch
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nop
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vmalloc_addr:
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/* If we get here, a vmalloc addr accessed, load kernel VPTE. */
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ldxa [%g3 + %g6] ASI_N, %g5
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brgez,pn %g5, longpath
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nop
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/* PTE is valid, load into TLB and return from trap. */
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stxa %g5, [%g0] ASI_DTLB_DATA_IN ! Reload TLB
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retry
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/* This is trivial with the new code... */
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.globl do_fpdis
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do_fpdis:
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sethi %hi(TSTATE_PEF), %g4 ! IEU0
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rdpr %tstate, %g5
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andcc %g5, %g4, %g0
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be,pt %xcc, 1f
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nop
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rd %fprs, %g5
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andcc %g5, FPRS_FEF, %g0
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be,pt %xcc, 1f
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nop
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/* Legal state when DCR_IFPOE is set in Cheetah %dcr. */
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sethi %hi(109f), %g7
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ba,pt %xcc, etrap
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109: or %g7, %lo(109b), %g7
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add %g0, %g0, %g0
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ba,a,pt %xcc, rtrap_clr_l6
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1: ldub [%g6 + TI_FPSAVED], %g5 ! Load Group
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wr %g0, FPRS_FEF, %fprs ! LSU Group+4bubbles
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andcc %g5, FPRS_FEF, %g0 ! IEU1 Group
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be,a,pt %icc, 1f ! CTI
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clr %g7 ! IEU0
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ldx [%g6 + TI_GSR], %g7 ! Load Group
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1: andcc %g5, FPRS_DL, %g0 ! IEU1
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bne,pn %icc, 2f ! CTI
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fzero %f0 ! FPA
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andcc %g5, FPRS_DU, %g0 ! IEU1 Group
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bne,pn %icc, 1f ! CTI
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fzero %f2 ! FPA
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faddd %f0, %f2, %f4
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fmuld %f0, %f2, %f6
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faddd %f0, %f2, %f8
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fmuld %f0, %f2, %f10
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faddd %f0, %f2, %f12
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fmuld %f0, %f2, %f14
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faddd %f0, %f2, %f16
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fmuld %f0, %f2, %f18
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faddd %f0, %f2, %f20
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fmuld %f0, %f2, %f22
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faddd %f0, %f2, %f24
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fmuld %f0, %f2, %f26
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faddd %f0, %f2, %f28
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fmuld %f0, %f2, %f30
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faddd %f0, %f2, %f32
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fmuld %f0, %f2, %f34
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faddd %f0, %f2, %f36
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fmuld %f0, %f2, %f38
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faddd %f0, %f2, %f40
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fmuld %f0, %f2, %f42
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faddd %f0, %f2, %f44
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fmuld %f0, %f2, %f46
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faddd %f0, %f2, %f48
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fmuld %f0, %f2, %f50
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faddd %f0, %f2, %f52
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fmuld %f0, %f2, %f54
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faddd %f0, %f2, %f56
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fmuld %f0, %f2, %f58
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b,pt %xcc, fpdis_exit2
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faddd %f0, %f2, %f60
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1: mov SECONDARY_CONTEXT, %g3
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add %g6, TI_FPREGS + 0x80, %g1
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faddd %f0, %f2, %f4
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fmuld %f0, %f2, %f6
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ldxa [%g3] ASI_DMMU, %g5
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cplus_fptrap_insn_1:
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sethi %hi(0), %g2
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stxa %g2, [%g3] ASI_DMMU
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membar #Sync
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add %g6, TI_FPREGS + 0xc0, %g2
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faddd %f0, %f2, %f8
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fmuld %f0, %f2, %f10
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ldda [%g1] ASI_BLK_S, %f32 ! grrr, where is ASI_BLK_NUCLEUS 8-(
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ldda [%g2] ASI_BLK_S, %f48
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faddd %f0, %f2, %f12
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fmuld %f0, %f2, %f14
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faddd %f0, %f2, %f16
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fmuld %f0, %f2, %f18
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faddd %f0, %f2, %f20
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fmuld %f0, %f2, %f22
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faddd %f0, %f2, %f24
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fmuld %f0, %f2, %f26
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faddd %f0, %f2, %f28
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fmuld %f0, %f2, %f30
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membar #Sync
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b,pt %xcc, fpdis_exit
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nop
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2: andcc %g5, FPRS_DU, %g0
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bne,pt %icc, 3f
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fzero %f32
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mov SECONDARY_CONTEXT, %g3
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fzero %f34
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ldxa [%g3] ASI_DMMU, %g5
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add %g6, TI_FPREGS, %g1
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cplus_fptrap_insn_2:
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sethi %hi(0), %g2
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stxa %g2, [%g3] ASI_DMMU
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membar #Sync
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add %g6, TI_FPREGS + 0x40, %g2
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faddd %f32, %f34, %f36
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fmuld %f32, %f34, %f38
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ldda [%g1] ASI_BLK_S, %f0 ! grrr, where is ASI_BLK_NUCLEUS 8-(
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ldda [%g2] ASI_BLK_S, %f16
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faddd %f32, %f34, %f40
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fmuld %f32, %f34, %f42
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faddd %f32, %f34, %f44
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fmuld %f32, %f34, %f46
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faddd %f32, %f34, %f48
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fmuld %f32, %f34, %f50
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faddd %f32, %f34, %f52
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fmuld %f32, %f34, %f54
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faddd %f32, %f34, %f56
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fmuld %f32, %f34, %f58
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faddd %f32, %f34, %f60
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fmuld %f32, %f34, %f62
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membar #Sync
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ba,pt %xcc, fpdis_exit
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nop
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3: mov SECONDARY_CONTEXT, %g3
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add %g6, TI_FPREGS, %g1
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ldxa [%g3] ASI_DMMU, %g5
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cplus_fptrap_insn_3:
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sethi %hi(0), %g2
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stxa %g2, [%g3] ASI_DMMU
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membar #Sync
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mov 0x40, %g2
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ldda [%g1] ASI_BLK_S, %f0 ! grrr, where is ASI_BLK_NUCLEUS 8-(
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ldda [%g1 + %g2] ASI_BLK_S, %f16
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add %g1, 0x80, %g1
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ldda [%g1] ASI_BLK_S, %f32
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ldda [%g1 + %g2] ASI_BLK_S, %f48
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membar #Sync
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fpdis_exit:
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stxa %g5, [%g3] ASI_DMMU
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membar #Sync
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fpdis_exit2:
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wr %g7, 0, %gsr
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ldx [%g6 + TI_XFSR], %fsr
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rdpr %tstate, %g3
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or %g3, %g4, %g3 ! anal...
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wrpr %g3, %tstate
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wr %g0, FPRS_FEF, %fprs ! clean DU/DL bits
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retry
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.align 32
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fp_other_bounce:
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call do_fpother
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add %sp, PTREGS_OFF, %o0
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ba,pt %xcc, rtrap
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clr %l6
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.globl do_fpother_check_fitos
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.align 32
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do_fpother_check_fitos:
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sethi %hi(fp_other_bounce - 4), %g7
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or %g7, %lo(fp_other_bounce - 4), %g7
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/* NOTE: Need to preserve %g7 until we fully commit
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* to the fitos fixup.
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*/
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stx %fsr, [%g6 + TI_XFSR]
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rdpr %tstate, %g3
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andcc %g3, TSTATE_PRIV, %g0
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bne,pn %xcc, do_fptrap_after_fsr
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nop
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ldx [%g6 + TI_XFSR], %g3
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srlx %g3, 14, %g1
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and %g1, 7, %g1
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cmp %g1, 2 ! Unfinished FP-OP
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bne,pn %xcc, do_fptrap_after_fsr
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sethi %hi(1 << 23), %g1 ! Inexact
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andcc %g3, %g1, %g0
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bne,pn %xcc, do_fptrap_after_fsr
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rdpr %tpc, %g1
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lduwa [%g1] ASI_AIUP, %g3 ! This cannot ever fail
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#define FITOS_MASK 0xc1f83fe0
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#define FITOS_COMPARE 0x81a01880
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sethi %hi(FITOS_MASK), %g1
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or %g1, %lo(FITOS_MASK), %g1
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and %g3, %g1, %g1
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sethi %hi(FITOS_COMPARE), %g2
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or %g2, %lo(FITOS_COMPARE), %g2
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cmp %g1, %g2
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bne,pn %xcc, do_fptrap_after_fsr
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nop
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std %f62, [%g6 + TI_FPREGS + (62 * 4)]
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sethi %hi(fitos_table_1), %g1
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and %g3, 0x1f, %g2
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or %g1, %lo(fitos_table_1), %g1
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sllx %g2, 2, %g2
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jmpl %g1 + %g2, %g0
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ba,pt %xcc, fitos_emul_continue
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fitos_table_1:
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fitod %f0, %f62
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fitod %f1, %f62
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fitod %f2, %f62
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fitod %f3, %f62
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fitod %f4, %f62
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fitod %f5, %f62
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fitod %f6, %f62
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fitod %f7, %f62
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fitod %f8, %f62
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fitod %f9, %f62
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fitod %f10, %f62
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fitod %f11, %f62
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fitod %f12, %f62
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fitod %f13, %f62
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fitod %f14, %f62
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fitod %f15, %f62
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fitod %f16, %f62
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fitod %f17, %f62
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fitod %f18, %f62
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fitod %f19, %f62
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fitod %f20, %f62
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fitod %f21, %f62
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fitod %f22, %f62
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fitod %f23, %f62
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fitod %f24, %f62
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fitod %f25, %f62
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fitod %f26, %f62
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fitod %f27, %f62
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fitod %f28, %f62
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fitod %f29, %f62
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fitod %f30, %f62
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fitod %f31, %f62
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fitos_emul_continue:
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sethi %hi(fitos_table_2), %g1
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srl %g3, 25, %g2
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or %g1, %lo(fitos_table_2), %g1
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and %g2, 0x1f, %g2
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sllx %g2, 2, %g2
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jmpl %g1 + %g2, %g0
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ba,pt %xcc, fitos_emul_fini
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fitos_table_2:
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fdtos %f62, %f0
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fdtos %f62, %f1
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fdtos %f62, %f2
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fdtos %f62, %f3
|
|
fdtos %f62, %f4
|
|
fdtos %f62, %f5
|
|
fdtos %f62, %f6
|
|
fdtos %f62, %f7
|
|
fdtos %f62, %f8
|
|
fdtos %f62, %f9
|
|
fdtos %f62, %f10
|
|
fdtos %f62, %f11
|
|
fdtos %f62, %f12
|
|
fdtos %f62, %f13
|
|
fdtos %f62, %f14
|
|
fdtos %f62, %f15
|
|
fdtos %f62, %f16
|
|
fdtos %f62, %f17
|
|
fdtos %f62, %f18
|
|
fdtos %f62, %f19
|
|
fdtos %f62, %f20
|
|
fdtos %f62, %f21
|
|
fdtos %f62, %f22
|
|
fdtos %f62, %f23
|
|
fdtos %f62, %f24
|
|
fdtos %f62, %f25
|
|
fdtos %f62, %f26
|
|
fdtos %f62, %f27
|
|
fdtos %f62, %f28
|
|
fdtos %f62, %f29
|
|
fdtos %f62, %f30
|
|
fdtos %f62, %f31
|
|
|
|
fitos_emul_fini:
|
|
ldd [%g6 + TI_FPREGS + (62 * 4)], %f62
|
|
done
|
|
|
|
.globl do_fptrap
|
|
.align 32
|
|
do_fptrap:
|
|
stx %fsr, [%g6 + TI_XFSR]
|
|
do_fptrap_after_fsr:
|
|
ldub [%g6 + TI_FPSAVED], %g3
|
|
rd %fprs, %g1
|
|
or %g3, %g1, %g3
|
|
stb %g3, [%g6 + TI_FPSAVED]
|
|
rd %gsr, %g3
|
|
stx %g3, [%g6 + TI_GSR]
|
|
mov SECONDARY_CONTEXT, %g3
|
|
ldxa [%g3] ASI_DMMU, %g5
|
|
cplus_fptrap_insn_4:
|
|
sethi %hi(0), %g2
|
|
stxa %g2, [%g3] ASI_DMMU
|
|
membar #Sync
|
|
add %g6, TI_FPREGS, %g2
|
|
andcc %g1, FPRS_DL, %g0
|
|
be,pn %icc, 4f
|
|
mov 0x40, %g3
|
|
stda %f0, [%g2] ASI_BLK_S
|
|
stda %f16, [%g2 + %g3] ASI_BLK_S
|
|
andcc %g1, FPRS_DU, %g0
|
|
be,pn %icc, 5f
|
|
4: add %g2, 128, %g2
|
|
stda %f32, [%g2] ASI_BLK_S
|
|
stda %f48, [%g2 + %g3] ASI_BLK_S
|
|
5: mov SECONDARY_CONTEXT, %g1
|
|
membar #Sync
|
|
stxa %g5, [%g1] ASI_DMMU
|
|
membar #Sync
|
|
ba,pt %xcc, etrap
|
|
wr %g0, 0, %fprs
|
|
|
|
cplus_fptrap_1:
|
|
sethi %hi(CTX_CHEETAH_PLUS_CTX0), %g2
|
|
|
|
.globl cheetah_plus_patch_fpdis
|
|
cheetah_plus_patch_fpdis:
|
|
/* We configure the dTLB512_0 for 4MB pages and the
|
|
* dTLB512_1 for 8K pages when in context zero.
|
|
*/
|
|
sethi %hi(cplus_fptrap_1), %o0
|
|
lduw [%o0 + %lo(cplus_fptrap_1)], %o1
|
|
|
|
set cplus_fptrap_insn_1, %o2
|
|
stw %o1, [%o2]
|
|
flush %o2
|
|
set cplus_fptrap_insn_2, %o2
|
|
stw %o1, [%o2]
|
|
flush %o2
|
|
set cplus_fptrap_insn_3, %o2
|
|
stw %o1, [%o2]
|
|
flush %o2
|
|
set cplus_fptrap_insn_4, %o2
|
|
stw %o1, [%o2]
|
|
flush %o2
|
|
|
|
retl
|
|
nop
|
|
|
|
/* The registers for cross calls will be:
|
|
*
|
|
* DATA 0: [low 32-bits] Address of function to call, jmp to this
|
|
* [high 32-bits] MMU Context Argument 0, place in %g5
|
|
* DATA 1: Address Argument 1, place in %g6
|
|
* DATA 2: Address Argument 2, place in %g7
|
|
*
|
|
* With this method we can do most of the cross-call tlb/cache
|
|
* flushing very quickly.
|
|
*
|
|
* Current CPU's IRQ worklist table is locked into %g1,
|
|
* don't touch.
|
|
*/
|
|
.text
|
|
.align 32
|
|
.globl do_ivec
|
|
do_ivec:
|
|
mov 0x40, %g3
|
|
ldxa [%g3 + %g0] ASI_INTR_R, %g3
|
|
sethi %hi(KERNBASE), %g4
|
|
cmp %g3, %g4
|
|
bgeu,pn %xcc, do_ivec_xcall
|
|
srlx %g3, 32, %g5
|
|
stxa %g0, [%g0] ASI_INTR_RECEIVE
|
|
membar #Sync
|
|
|
|
sethi %hi(ivector_table), %g2
|
|
sllx %g3, 5, %g3
|
|
or %g2, %lo(ivector_table), %g2
|
|
add %g2, %g3, %g3
|
|
ldub [%g3 + 0x04], %g4 /* pil */
|
|
mov 1, %g2
|
|
sllx %g2, %g4, %g2
|
|
sllx %g4, 2, %g4
|
|
|
|
lduw [%g6 + %g4], %g5 /* g5 = irq_work(cpu, pil) */
|
|
stw %g5, [%g3 + 0x00] /* bucket->irq_chain = g5 */
|
|
stw %g3, [%g6 + %g4] /* irq_work(cpu, pil) = bucket */
|
|
wr %g2, 0x0, %set_softint
|
|
retry
|
|
do_ivec_xcall:
|
|
mov 0x50, %g1
|
|
ldxa [%g1 + %g0] ASI_INTR_R, %g1
|
|
srl %g3, 0, %g3
|
|
|
|
mov 0x60, %g7
|
|
ldxa [%g7 + %g0] ASI_INTR_R, %g7
|
|
stxa %g0, [%g0] ASI_INTR_RECEIVE
|
|
membar #Sync
|
|
ba,pt %xcc, 1f
|
|
nop
|
|
|
|
.align 32
|
|
1: jmpl %g3, %g0
|
|
nop
|
|
|
|
.globl save_alternate_globals
|
|
save_alternate_globals: /* %o0 = save_area */
|
|
rdpr %pstate, %o5
|
|
andn %o5, PSTATE_IE, %o1
|
|
wrpr %o1, PSTATE_AG, %pstate
|
|
stx %g0, [%o0 + 0x00]
|
|
stx %g1, [%o0 + 0x08]
|
|
stx %g2, [%o0 + 0x10]
|
|
stx %g3, [%o0 + 0x18]
|
|
stx %g4, [%o0 + 0x20]
|
|
stx %g5, [%o0 + 0x28]
|
|
stx %g6, [%o0 + 0x30]
|
|
stx %g7, [%o0 + 0x38]
|
|
wrpr %o1, PSTATE_IG, %pstate
|
|
stx %g0, [%o0 + 0x40]
|
|
stx %g1, [%o0 + 0x48]
|
|
stx %g2, [%o0 + 0x50]
|
|
stx %g3, [%o0 + 0x58]
|
|
stx %g4, [%o0 + 0x60]
|
|
stx %g5, [%o0 + 0x68]
|
|
stx %g6, [%o0 + 0x70]
|
|
stx %g7, [%o0 + 0x78]
|
|
wrpr %o1, PSTATE_MG, %pstate
|
|
stx %g0, [%o0 + 0x80]
|
|
stx %g1, [%o0 + 0x88]
|
|
stx %g2, [%o0 + 0x90]
|
|
stx %g3, [%o0 + 0x98]
|
|
stx %g4, [%o0 + 0xa0]
|
|
stx %g5, [%o0 + 0xa8]
|
|
stx %g6, [%o0 + 0xb0]
|
|
stx %g7, [%o0 + 0xb8]
|
|
wrpr %o5, 0x0, %pstate
|
|
retl
|
|
nop
|
|
|
|
.globl restore_alternate_globals
|
|
restore_alternate_globals: /* %o0 = save_area */
|
|
rdpr %pstate, %o5
|
|
andn %o5, PSTATE_IE, %o1
|
|
wrpr %o1, PSTATE_AG, %pstate
|
|
ldx [%o0 + 0x00], %g0
|
|
ldx [%o0 + 0x08], %g1
|
|
ldx [%o0 + 0x10], %g2
|
|
ldx [%o0 + 0x18], %g3
|
|
ldx [%o0 + 0x20], %g4
|
|
ldx [%o0 + 0x28], %g5
|
|
ldx [%o0 + 0x30], %g6
|
|
ldx [%o0 + 0x38], %g7
|
|
wrpr %o1, PSTATE_IG, %pstate
|
|
ldx [%o0 + 0x40], %g0
|
|
ldx [%o0 + 0x48], %g1
|
|
ldx [%o0 + 0x50], %g2
|
|
ldx [%o0 + 0x58], %g3
|
|
ldx [%o0 + 0x60], %g4
|
|
ldx [%o0 + 0x68], %g5
|
|
ldx [%o0 + 0x70], %g6
|
|
ldx [%o0 + 0x78], %g7
|
|
wrpr %o1, PSTATE_MG, %pstate
|
|
ldx [%o0 + 0x80], %g0
|
|
ldx [%o0 + 0x88], %g1
|
|
ldx [%o0 + 0x90], %g2
|
|
ldx [%o0 + 0x98], %g3
|
|
ldx [%o0 + 0xa0], %g4
|
|
ldx [%o0 + 0xa8], %g5
|
|
ldx [%o0 + 0xb0], %g6
|
|
ldx [%o0 + 0xb8], %g7
|
|
wrpr %o5, 0x0, %pstate
|
|
retl
|
|
nop
|
|
|
|
.globl getcc, setcc
|
|
getcc:
|
|
ldx [%o0 + PT_V9_TSTATE], %o1
|
|
srlx %o1, 32, %o1
|
|
and %o1, 0xf, %o1
|
|
retl
|
|
stx %o1, [%o0 + PT_V9_G1]
|
|
setcc:
|
|
ldx [%o0 + PT_V9_TSTATE], %o1
|
|
ldx [%o0 + PT_V9_G1], %o2
|
|
or %g0, %ulo(TSTATE_ICC), %o3
|
|
sllx %o3, 32, %o3
|
|
andn %o1, %o3, %o1
|
|
sllx %o2, 32, %o2
|
|
and %o2, %o3, %o2
|
|
or %o1, %o2, %o1
|
|
retl
|
|
stx %o1, [%o0 + PT_V9_TSTATE]
|
|
|
|
.globl utrap, utrap_ill
|
|
utrap: brz,pn %g1, etrap
|
|
nop
|
|
save %sp, -128, %sp
|
|
rdpr %tstate, %l6
|
|
rdpr %cwp, %l7
|
|
andn %l6, TSTATE_CWP, %l6
|
|
wrpr %l6, %l7, %tstate
|
|
rdpr %tpc, %l6
|
|
rdpr %tnpc, %l7
|
|
wrpr %g1, 0, %tnpc
|
|
done
|
|
utrap_ill:
|
|
call bad_trap
|
|
add %sp, PTREGS_OFF, %o0
|
|
ba,pt %xcc, rtrap
|
|
clr %l6
|
|
|
|
/* XXX Here is stuff we still need to write... -DaveM XXX */
|
|
.globl netbsd_syscall
|
|
netbsd_syscall:
|
|
retl
|
|
nop
|
|
|
|
.globl __do_data_access_exception
|
|
.globl __do_data_access_exception_tl1
|
|
__do_data_access_exception_tl1:
|
|
rdpr %pstate, %g4
|
|
wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
|
|
mov TLB_SFSR, %g3
|
|
mov DMMU_SFAR, %g5
|
|
ldxa [%g3] ASI_DMMU, %g4 ! Get SFSR
|
|
ldxa [%g5] ASI_DMMU, %g5 ! Get SFAR
|
|
stxa %g0, [%g3] ASI_DMMU ! Clear SFSR.FaultValid bit
|
|
membar #Sync
|
|
rdpr %tt, %g3
|
|
cmp %g3, 0x80 ! first win spill/fill trap
|
|
blu,pn %xcc, 1f
|
|
cmp %g3, 0xff ! last win spill/fill trap
|
|
bgu,pn %xcc, 1f
|
|
nop
|
|
ba,pt %xcc, winfix_dax
|
|
rdpr %tpc, %g3
|
|
1: sethi %hi(109f), %g7
|
|
ba,pt %xcc, etraptl1
|
|
109: or %g7, %lo(109b), %g7
|
|
mov %l4, %o1
|
|
mov %l5, %o2
|
|
call data_access_exception_tl1
|
|
add %sp, PTREGS_OFF, %o0
|
|
ba,pt %xcc, rtrap
|
|
clr %l6
|
|
|
|
__do_data_access_exception:
|
|
rdpr %pstate, %g4
|
|
wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
|
|
mov TLB_SFSR, %g3
|
|
mov DMMU_SFAR, %g5
|
|
ldxa [%g3] ASI_DMMU, %g4 ! Get SFSR
|
|
ldxa [%g5] ASI_DMMU, %g5 ! Get SFAR
|
|
stxa %g0, [%g3] ASI_DMMU ! Clear SFSR.FaultValid bit
|
|
membar #Sync
|
|
sethi %hi(109f), %g7
|
|
ba,pt %xcc, etrap
|
|
109: or %g7, %lo(109b), %g7
|
|
mov %l4, %o1
|
|
mov %l5, %o2
|
|
call data_access_exception
|
|
add %sp, PTREGS_OFF, %o0
|
|
ba,pt %xcc, rtrap
|
|
clr %l6
|
|
|
|
.globl __do_instruction_access_exception
|
|
.globl __do_instruction_access_exception_tl1
|
|
__do_instruction_access_exception_tl1:
|
|
rdpr %pstate, %g4
|
|
wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
|
|
mov TLB_SFSR, %g3
|
|
ldxa [%g3] ASI_IMMU, %g4 ! Get SFSR
|
|
rdpr %tpc, %g5 ! IMMU has no SFAR, use TPC
|
|
stxa %g0, [%g3] ASI_IMMU ! Clear FaultValid bit
|
|
membar #Sync
|
|
sethi %hi(109f), %g7
|
|
ba,pt %xcc, etraptl1
|
|
109: or %g7, %lo(109b), %g7
|
|
mov %l4, %o1
|
|
mov %l5, %o2
|
|
call instruction_access_exception_tl1
|
|
add %sp, PTREGS_OFF, %o0
|
|
ba,pt %xcc, rtrap
|
|
clr %l6
|
|
|
|
__do_instruction_access_exception:
|
|
rdpr %pstate, %g4
|
|
wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
|
|
mov TLB_SFSR, %g3
|
|
ldxa [%g3] ASI_IMMU, %g4 ! Get SFSR
|
|
rdpr %tpc, %g5 ! IMMU has no SFAR, use TPC
|
|
stxa %g0, [%g3] ASI_IMMU ! Clear FaultValid bit
|
|
membar #Sync
|
|
sethi %hi(109f), %g7
|
|
ba,pt %xcc, etrap
|
|
109: or %g7, %lo(109b), %g7
|
|
mov %l4, %o1
|
|
mov %l5, %o2
|
|
call instruction_access_exception
|
|
add %sp, PTREGS_OFF, %o0
|
|
ba,pt %xcc, rtrap
|
|
clr %l6
|
|
|
|
/* This is the trap handler entry point for ECC correctable
|
|
* errors. They are corrected, but we listen for the trap
|
|
* so that the event can be logged.
|
|
*
|
|
* Disrupting errors are either:
|
|
* 1) single-bit ECC errors during UDB reads to system
|
|
* memory
|
|
* 2) data parity errors during write-back events
|
|
*
|
|
* As far as I can make out from the manual, the CEE trap
|
|
* is only for correctable errors during memory read
|
|
* accesses by the front-end of the processor.
|
|
*
|
|
* The code below is only for trap level 1 CEE events,
|
|
* as it is the only situation where we can safely record
|
|
* and log. For trap level >1 we just clear the CE bit
|
|
* in the AFSR and return.
|
|
*/
|
|
|
|
/* Our trap handling infrastructure allows us to preserve
|
|
* two 64-bit values during etrap for arguments to
|
|
* subsequent C code. Therefore we encode the information
|
|
* as follows:
|
|
*
|
|
* value 1) Full 64-bits of AFAR
|
|
* value 2) Low 33-bits of AFSR, then bits 33-->42
|
|
* are UDBL error status and bits 43-->52
|
|
* are UDBH error status
|
|
*/
|
|
.align 64
|
|
.globl cee_trap
|
|
cee_trap:
|
|
ldxa [%g0] ASI_AFSR, %g1 ! Read AFSR
|
|
ldxa [%g0] ASI_AFAR, %g2 ! Read AFAR
|
|
sllx %g1, 31, %g1 ! Clear reserved bits
|
|
srlx %g1, 31, %g1 ! in AFSR
|
|
|
|
/* NOTE: UltraSparc-I/II have high and low UDB error
|
|
* registers, corresponding to the two UDB units
|
|
* present on those chips. UltraSparc-IIi only
|
|
* has a single UDB, called "SDB" in the manual.
|
|
* For IIi the upper UDB register always reads
|
|
* as zero so for our purposes things will just
|
|
* work with the checks below.
|
|
*/
|
|
ldxa [%g0] ASI_UDBL_ERROR_R, %g3 ! Read UDB-Low error status
|
|
andcc %g3, (1 << 8), %g4 ! Check CE bit
|
|
sllx %g3, (64 - 10), %g3 ! Clear reserved bits
|
|
srlx %g3, (64 - 10), %g3 ! in UDB-Low error status
|
|
|
|
sllx %g3, (33 + 0), %g3 ! Shift up to encoding area
|
|
or %g1, %g3, %g1 ! Or it in
|
|
be,pn %xcc, 1f ! Branch if CE bit was clear
|
|
nop
|
|
stxa %g4, [%g0] ASI_UDB_ERROR_W ! Clear CE sticky bit in UDBL
|
|
membar #Sync ! Synchronize ASI stores
|
|
1: mov 0x18, %g5 ! Addr of UDB-High error status
|
|
ldxa [%g5] ASI_UDBH_ERROR_R, %g3 ! Read it
|
|
|
|
andcc %g3, (1 << 8), %g4 ! Check CE bit
|
|
sllx %g3, (64 - 10), %g3 ! Clear reserved bits
|
|
srlx %g3, (64 - 10), %g3 ! in UDB-High error status
|
|
sllx %g3, (33 + 10), %g3 ! Shift up to encoding area
|
|
or %g1, %g3, %g1 ! Or it in
|
|
be,pn %xcc, 1f ! Branch if CE bit was clear
|
|
nop
|
|
nop
|
|
|
|
stxa %g4, [%g5] ASI_UDB_ERROR_W ! Clear CE sticky bit in UDBH
|
|
membar #Sync ! Synchronize ASI stores
|
|
1: mov 1, %g5 ! AFSR CE bit is
|
|
sllx %g5, 20, %g5 ! bit 20
|
|
stxa %g5, [%g0] ASI_AFSR ! Clear CE sticky bit in AFSR
|
|
membar #Sync ! Synchronize ASI stores
|
|
sllx %g2, (64 - 41), %g2 ! Clear reserved bits
|
|
srlx %g2, (64 - 41), %g2 ! in latched AFAR
|
|
|
|
andn %g2, 0x0f, %g2 ! Finish resv bit clearing
|
|
mov %g1, %g4 ! Move AFSR+UDB* into save reg
|
|
mov %g2, %g5 ! Move AFAR into save reg
|
|
rdpr %pil, %g2
|
|
wrpr %g0, 15, %pil
|
|
ba,pt %xcc, etrap_irq
|
|
rd %pc, %g7
|
|
mov %l4, %o0
|
|
|
|
mov %l5, %o1
|
|
call cee_log
|
|
add %sp, PTREGS_OFF, %o2
|
|
ba,a,pt %xcc, rtrap_irq
|
|
|
|
/* Capture I/D/E-cache state into per-cpu error scoreboard.
|
|
*
|
|
* %g1: (TL>=0) ? 1 : 0
|
|
* %g2: scratch
|
|
* %g3: scratch
|
|
* %g4: AFSR
|
|
* %g5: AFAR
|
|
* %g6: current thread ptr
|
|
* %g7: scratch
|
|
*/
|
|
#define CHEETAH_LOG_ERROR \
|
|
/* Put "TL1" software bit into AFSR. */ \
|
|
and %g1, 0x1, %g1; \
|
|
sllx %g1, 63, %g2; \
|
|
or %g4, %g2, %g4; \
|
|
/* Get log entry pointer for this cpu at this trap level. */ \
|
|
BRANCH_IF_JALAPENO(g2,g3,50f) \
|
|
ldxa [%g0] ASI_SAFARI_CONFIG, %g2; \
|
|
srlx %g2, 17, %g2; \
|
|
ba,pt %xcc, 60f; \
|
|
and %g2, 0x3ff, %g2; \
|
|
50: ldxa [%g0] ASI_JBUS_CONFIG, %g2; \
|
|
srlx %g2, 17, %g2; \
|
|
and %g2, 0x1f, %g2; \
|
|
60: sllx %g2, 9, %g2; \
|
|
sethi %hi(cheetah_error_log), %g3; \
|
|
ldx [%g3 + %lo(cheetah_error_log)], %g3; \
|
|
brz,pn %g3, 80f; \
|
|
nop; \
|
|
add %g3, %g2, %g3; \
|
|
sllx %g1, 8, %g1; \
|
|
add %g3, %g1, %g1; \
|
|
/* %g1 holds pointer to the top of the logging scoreboard */ \
|
|
ldx [%g1 + 0x0], %g7; \
|
|
cmp %g7, -1; \
|
|
bne,pn %xcc, 80f; \
|
|
nop; \
|
|
stx %g4, [%g1 + 0x0]; \
|
|
stx %g5, [%g1 + 0x8]; \
|
|
add %g1, 0x10, %g1; \
|
|
/* %g1 now points to D-cache logging area */ \
|
|
set 0x3ff8, %g2; /* DC_addr mask */ \
|
|
and %g5, %g2, %g2; /* DC_addr bits of AFAR */ \
|
|
srlx %g5, 12, %g3; \
|
|
or %g3, 1, %g3; /* PHYS tag + valid */ \
|
|
10: ldxa [%g2] ASI_DCACHE_TAG, %g7; \
|
|
cmp %g3, %g7; /* TAG match? */ \
|
|
bne,pt %xcc, 13f; \
|
|
nop; \
|
|
/* Yep, what we want, capture state. */ \
|
|
stx %g2, [%g1 + 0x20]; \
|
|
stx %g7, [%g1 + 0x28]; \
|
|
/* A membar Sync is required before and after utag access. */ \
|
|
membar #Sync; \
|
|
ldxa [%g2] ASI_DCACHE_UTAG, %g7; \
|
|
membar #Sync; \
|
|
stx %g7, [%g1 + 0x30]; \
|
|
ldxa [%g2] ASI_DCACHE_SNOOP_TAG, %g7; \
|
|
stx %g7, [%g1 + 0x38]; \
|
|
clr %g3; \
|
|
12: ldxa [%g2 + %g3] ASI_DCACHE_DATA, %g7; \
|
|
stx %g7, [%g1]; \
|
|
add %g3, (1 << 5), %g3; \
|
|
cmp %g3, (4 << 5); \
|
|
bl,pt %xcc, 12b; \
|
|
add %g1, 0x8, %g1; \
|
|
ba,pt %xcc, 20f; \
|
|
add %g1, 0x20, %g1; \
|
|
13: sethi %hi(1 << 14), %g7; \
|
|
add %g2, %g7, %g2; \
|
|
srlx %g2, 14, %g7; \
|
|
cmp %g7, 4; \
|
|
bl,pt %xcc, 10b; \
|
|
nop; \
|
|
add %g1, 0x40, %g1; \
|
|
20: /* %g1 now points to I-cache logging area */ \
|
|
set 0x1fe0, %g2; /* IC_addr mask */ \
|
|
and %g5, %g2, %g2; /* IC_addr bits of AFAR */ \
|
|
sllx %g2, 1, %g2; /* IC_addr[13:6]==VA[12:5] */ \
|
|
srlx %g5, (13 - 8), %g3; /* Make PTAG */ \
|
|
andn %g3, 0xff, %g3; /* Mask off undefined bits */ \
|
|
21: ldxa [%g2] ASI_IC_TAG, %g7; \
|
|
andn %g7, 0xff, %g7; \
|
|
cmp %g3, %g7; \
|
|
bne,pt %xcc, 23f; \
|
|
nop; \
|
|
/* Yep, what we want, capture state. */ \
|
|
stx %g2, [%g1 + 0x40]; \
|
|
stx %g7, [%g1 + 0x48]; \
|
|
add %g2, (1 << 3), %g2; \
|
|
ldxa [%g2] ASI_IC_TAG, %g7; \
|
|
add %g2, (1 << 3), %g2; \
|
|
stx %g7, [%g1 + 0x50]; \
|
|
ldxa [%g2] ASI_IC_TAG, %g7; \
|
|
add %g2, (1 << 3), %g2; \
|
|
stx %g7, [%g1 + 0x60]; \
|
|
ldxa [%g2] ASI_IC_TAG, %g7; \
|
|
stx %g7, [%g1 + 0x68]; \
|
|
sub %g2, (3 << 3), %g2; \
|
|
ldxa [%g2] ASI_IC_STAG, %g7; \
|
|
stx %g7, [%g1 + 0x58]; \
|
|
clr %g3; \
|
|
srlx %g2, 2, %g2; \
|
|
22: ldxa [%g2 + %g3] ASI_IC_INSTR, %g7; \
|
|
stx %g7, [%g1]; \
|
|
add %g3, (1 << 3), %g3; \
|
|
cmp %g3, (8 << 3); \
|
|
bl,pt %xcc, 22b; \
|
|
add %g1, 0x8, %g1; \
|
|
ba,pt %xcc, 30f; \
|
|
add %g1, 0x30, %g1; \
|
|
23: sethi %hi(1 << 14), %g7; \
|
|
add %g2, %g7, %g2; \
|
|
srlx %g2, 14, %g7; \
|
|
cmp %g7, 4; \
|
|
bl,pt %xcc, 21b; \
|
|
nop; \
|
|
add %g1, 0x70, %g1; \
|
|
30: /* %g1 now points to E-cache logging area */ \
|
|
andn %g5, (32 - 1), %g2; /* E-cache subblock */ \
|
|
stx %g2, [%g1 + 0x20]; \
|
|
ldxa [%g2] ASI_EC_TAG_DATA, %g7; \
|
|
stx %g7, [%g1 + 0x28]; \
|
|
ldxa [%g2] ASI_EC_R, %g0; \
|
|
clr %g3; \
|
|
31: ldxa [%g3] ASI_EC_DATA, %g7; \
|
|
stx %g7, [%g1 + %g3]; \
|
|
add %g3, 0x8, %g3; \
|
|
cmp %g3, 0x20; \
|
|
bl,pt %xcc, 31b; \
|
|
nop; \
|
|
80: /* DONE */
|
|
|
|
/* These get patched into the trap table at boot time
|
|
* once we know we have a cheetah processor.
|
|
*/
|
|
.globl cheetah_fecc_trap_vector, cheetah_fecc_trap_vector_tl1
|
|
cheetah_fecc_trap_vector:
|
|
membar #Sync
|
|
ldxa [%g0] ASI_DCU_CONTROL_REG, %g1
|
|
andn %g1, DCU_DC | DCU_IC, %g1
|
|
stxa %g1, [%g0] ASI_DCU_CONTROL_REG
|
|
membar #Sync
|
|
sethi %hi(cheetah_fast_ecc), %g2
|
|
jmpl %g2 + %lo(cheetah_fast_ecc), %g0
|
|
mov 0, %g1
|
|
cheetah_fecc_trap_vector_tl1:
|
|
membar #Sync
|
|
ldxa [%g0] ASI_DCU_CONTROL_REG, %g1
|
|
andn %g1, DCU_DC | DCU_IC, %g1
|
|
stxa %g1, [%g0] ASI_DCU_CONTROL_REG
|
|
membar #Sync
|
|
sethi %hi(cheetah_fast_ecc), %g2
|
|
jmpl %g2 + %lo(cheetah_fast_ecc), %g0
|
|
mov 1, %g1
|
|
.globl cheetah_cee_trap_vector, cheetah_cee_trap_vector_tl1
|
|
cheetah_cee_trap_vector:
|
|
membar #Sync
|
|
ldxa [%g0] ASI_DCU_CONTROL_REG, %g1
|
|
andn %g1, DCU_IC, %g1
|
|
stxa %g1, [%g0] ASI_DCU_CONTROL_REG
|
|
membar #Sync
|
|
sethi %hi(cheetah_cee), %g2
|
|
jmpl %g2 + %lo(cheetah_cee), %g0
|
|
mov 0, %g1
|
|
cheetah_cee_trap_vector_tl1:
|
|
membar #Sync
|
|
ldxa [%g0] ASI_DCU_CONTROL_REG, %g1
|
|
andn %g1, DCU_IC, %g1
|
|
stxa %g1, [%g0] ASI_DCU_CONTROL_REG
|
|
membar #Sync
|
|
sethi %hi(cheetah_cee), %g2
|
|
jmpl %g2 + %lo(cheetah_cee), %g0
|
|
mov 1, %g1
|
|
.globl cheetah_deferred_trap_vector, cheetah_deferred_trap_vector_tl1
|
|
cheetah_deferred_trap_vector:
|
|
membar #Sync
|
|
ldxa [%g0] ASI_DCU_CONTROL_REG, %g1;
|
|
andn %g1, DCU_DC | DCU_IC, %g1;
|
|
stxa %g1, [%g0] ASI_DCU_CONTROL_REG;
|
|
membar #Sync;
|
|
sethi %hi(cheetah_deferred_trap), %g2
|
|
jmpl %g2 + %lo(cheetah_deferred_trap), %g0
|
|
mov 0, %g1
|
|
cheetah_deferred_trap_vector_tl1:
|
|
membar #Sync;
|
|
ldxa [%g0] ASI_DCU_CONTROL_REG, %g1;
|
|
andn %g1, DCU_DC | DCU_IC, %g1;
|
|
stxa %g1, [%g0] ASI_DCU_CONTROL_REG;
|
|
membar #Sync;
|
|
sethi %hi(cheetah_deferred_trap), %g2
|
|
jmpl %g2 + %lo(cheetah_deferred_trap), %g0
|
|
mov 1, %g1
|
|
|
|
/* Cheetah+ specific traps. These are for the new I/D cache parity
|
|
* error traps. The first argument to cheetah_plus_parity_handler
|
|
* is encoded as follows:
|
|
*
|
|
* Bit0: 0=dcache,1=icache
|
|
* Bit1: 0=recoverable,1=unrecoverable
|
|
*/
|
|
.globl cheetah_plus_dcpe_trap_vector, cheetah_plus_dcpe_trap_vector_tl1
|
|
cheetah_plus_dcpe_trap_vector:
|
|
membar #Sync
|
|
sethi %hi(do_cheetah_plus_data_parity), %g7
|
|
jmpl %g7 + %lo(do_cheetah_plus_data_parity), %g0
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
|
|
do_cheetah_plus_data_parity:
|
|
ba,pt %xcc, etrap
|
|
rd %pc, %g7
|
|
mov 0x0, %o0
|
|
call cheetah_plus_parity_error
|
|
add %sp, PTREGS_OFF, %o1
|
|
ba,pt %xcc, rtrap
|
|
clr %l6
|
|
|
|
cheetah_plus_dcpe_trap_vector_tl1:
|
|
membar #Sync
|
|
wrpr PSTATE_IG | PSTATE_PEF | PSTATE_PRIV, %pstate
|
|
sethi %hi(do_dcpe_tl1), %g3
|
|
jmpl %g3 + %lo(do_dcpe_tl1), %g0
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
|
|
.globl cheetah_plus_icpe_trap_vector, cheetah_plus_icpe_trap_vector_tl1
|
|
cheetah_plus_icpe_trap_vector:
|
|
membar #Sync
|
|
sethi %hi(do_cheetah_plus_insn_parity), %g7
|
|
jmpl %g7 + %lo(do_cheetah_plus_insn_parity), %g0
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
|
|
do_cheetah_plus_insn_parity:
|
|
ba,pt %xcc, etrap
|
|
rd %pc, %g7
|
|
mov 0x1, %o0
|
|
call cheetah_plus_parity_error
|
|
add %sp, PTREGS_OFF, %o1
|
|
ba,pt %xcc, rtrap
|
|
clr %l6
|
|
|
|
cheetah_plus_icpe_trap_vector_tl1:
|
|
membar #Sync
|
|
wrpr PSTATE_IG | PSTATE_PEF | PSTATE_PRIV, %pstate
|
|
sethi %hi(do_icpe_tl1), %g3
|
|
jmpl %g3 + %lo(do_icpe_tl1), %g0
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
|
|
/* If we take one of these traps when tl >= 1, then we
|
|
* jump to interrupt globals. If some trap level above us
|
|
* was also using interrupt globals, we cannot recover.
|
|
* We may use all interrupt global registers except %g6.
|
|
*/
|
|
.globl do_dcpe_tl1, do_icpe_tl1
|
|
do_dcpe_tl1:
|
|
rdpr %tl, %g1 ! Save original trap level
|
|
mov 1, %g2 ! Setup TSTATE checking loop
|
|
sethi %hi(TSTATE_IG), %g3 ! TSTATE mask bit
|
|
1: wrpr %g2, %tl ! Set trap level to check
|
|
rdpr %tstate, %g4 ! Read TSTATE for this level
|
|
andcc %g4, %g3, %g0 ! Interrupt globals in use?
|
|
bne,a,pn %xcc, do_dcpe_tl1_fatal ! Yep, irrecoverable
|
|
wrpr %g1, %tl ! Restore original trap level
|
|
add %g2, 1, %g2 ! Next trap level
|
|
cmp %g2, %g1 ! Hit them all yet?
|
|
ble,pt %icc, 1b ! Not yet
|
|
nop
|
|
wrpr %g1, %tl ! Restore original trap level
|
|
do_dcpe_tl1_nonfatal: /* Ok we may use interrupt globals safely. */
|
|
/* Reset D-cache parity */
|
|
sethi %hi(1 << 16), %g1 ! D-cache size
|
|
mov (1 << 5), %g2 ! D-cache line size
|
|
sub %g1, %g2, %g1 ! Move down 1 cacheline
|
|
1: srl %g1, 14, %g3 ! Compute UTAG
|
|
membar #Sync
|
|
stxa %g3, [%g1] ASI_DCACHE_UTAG
|
|
membar #Sync
|
|
sub %g2, 8, %g3 ! 64-bit data word within line
|
|
2: membar #Sync
|
|
stxa %g0, [%g1 + %g3] ASI_DCACHE_DATA
|
|
membar #Sync
|
|
subcc %g3, 8, %g3 ! Next 64-bit data word
|
|
bge,pt %icc, 2b
|
|
nop
|
|
subcc %g1, %g2, %g1 ! Next cacheline
|
|
bge,pt %icc, 1b
|
|
nop
|
|
ba,pt %xcc, dcpe_icpe_tl1_common
|
|
nop
|
|
|
|
do_dcpe_tl1_fatal:
|
|
sethi %hi(1f), %g7
|
|
ba,pt %xcc, etraptl1
|
|
1: or %g7, %lo(1b), %g7
|
|
mov 0x2, %o0
|
|
call cheetah_plus_parity_error
|
|
add %sp, PTREGS_OFF, %o1
|
|
ba,pt %xcc, rtrap
|
|
clr %l6
|
|
|
|
do_icpe_tl1:
|
|
rdpr %tl, %g1 ! Save original trap level
|
|
mov 1, %g2 ! Setup TSTATE checking loop
|
|
sethi %hi(TSTATE_IG), %g3 ! TSTATE mask bit
|
|
1: wrpr %g2, %tl ! Set trap level to check
|
|
rdpr %tstate, %g4 ! Read TSTATE for this level
|
|
andcc %g4, %g3, %g0 ! Interrupt globals in use?
|
|
bne,a,pn %xcc, do_icpe_tl1_fatal ! Yep, irrecoverable
|
|
wrpr %g1, %tl ! Restore original trap level
|
|
add %g2, 1, %g2 ! Next trap level
|
|
cmp %g2, %g1 ! Hit them all yet?
|
|
ble,pt %icc, 1b ! Not yet
|
|
nop
|
|
wrpr %g1, %tl ! Restore original trap level
|
|
do_icpe_tl1_nonfatal: /* Ok we may use interrupt globals safely. */
|
|
/* Flush I-cache */
|
|
sethi %hi(1 << 15), %g1 ! I-cache size
|
|
mov (1 << 5), %g2 ! I-cache line size
|
|
sub %g1, %g2, %g1
|
|
1: or %g1, (2 << 3), %g3
|
|
stxa %g0, [%g3] ASI_IC_TAG
|
|
membar #Sync
|
|
subcc %g1, %g2, %g1
|
|
bge,pt %icc, 1b
|
|
nop
|
|
ba,pt %xcc, dcpe_icpe_tl1_common
|
|
nop
|
|
|
|
do_icpe_tl1_fatal:
|
|
sethi %hi(1f), %g7
|
|
ba,pt %xcc, etraptl1
|
|
1: or %g7, %lo(1b), %g7
|
|
mov 0x3, %o0
|
|
call cheetah_plus_parity_error
|
|
add %sp, PTREGS_OFF, %o1
|
|
ba,pt %xcc, rtrap
|
|
clr %l6
|
|
|
|
dcpe_icpe_tl1_common:
|
|
/* Flush D-cache, re-enable D/I caches in DCU and finally
|
|
* retry the trapping instruction.
|
|
*/
|
|
sethi %hi(1 << 16), %g1 ! D-cache size
|
|
mov (1 << 5), %g2 ! D-cache line size
|
|
sub %g1, %g2, %g1
|
|
1: stxa %g0, [%g1] ASI_DCACHE_TAG
|
|
membar #Sync
|
|
subcc %g1, %g2, %g1
|
|
bge,pt %icc, 1b
|
|
nop
|
|
ldxa [%g0] ASI_DCU_CONTROL_REG, %g1
|
|
or %g1, (DCU_DC | DCU_IC), %g1
|
|
stxa %g1, [%g0] ASI_DCU_CONTROL_REG
|
|
membar #Sync
|
|
retry
|
|
|
|
/* Cheetah FECC trap handling, we get here from tl{0,1}_fecc
|
|
* in the trap table. That code has done a memory barrier
|
|
* and has disabled both the I-cache and D-cache in the DCU
|
|
* control register. The I-cache is disabled so that we may
|
|
* capture the corrupted cache line, and the D-cache is disabled
|
|
* because corrupt data may have been placed there and we don't
|
|
* want to reference it.
|
|
*
|
|
* %g1 is one if this trap occurred at %tl >= 1.
|
|
*
|
|
* Next, we turn off error reporting so that we don't recurse.
|
|
*/
|
|
.globl cheetah_fast_ecc
|
|
cheetah_fast_ecc:
|
|
ldxa [%g0] ASI_ESTATE_ERROR_EN, %g2
|
|
andn %g2, ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN, %g2
|
|
stxa %g2, [%g0] ASI_ESTATE_ERROR_EN
|
|
membar #Sync
|
|
|
|
/* Fetch and clear AFSR/AFAR */
|
|
ldxa [%g0] ASI_AFSR, %g4
|
|
ldxa [%g0] ASI_AFAR, %g5
|
|
stxa %g4, [%g0] ASI_AFSR
|
|
membar #Sync
|
|
|
|
CHEETAH_LOG_ERROR
|
|
|
|
rdpr %pil, %g2
|
|
wrpr %g0, 15, %pil
|
|
ba,pt %xcc, etrap_irq
|
|
rd %pc, %g7
|
|
mov %l4, %o1
|
|
mov %l5, %o2
|
|
call cheetah_fecc_handler
|
|
add %sp, PTREGS_OFF, %o0
|
|
ba,a,pt %xcc, rtrap_irq
|
|
|
|
/* Our caller has disabled I-cache and performed membar Sync. */
|
|
.globl cheetah_cee
|
|
cheetah_cee:
|
|
ldxa [%g0] ASI_ESTATE_ERROR_EN, %g2
|
|
andn %g2, ESTATE_ERROR_CEEN, %g2
|
|
stxa %g2, [%g0] ASI_ESTATE_ERROR_EN
|
|
membar #Sync
|
|
|
|
/* Fetch and clear AFSR/AFAR */
|
|
ldxa [%g0] ASI_AFSR, %g4
|
|
ldxa [%g0] ASI_AFAR, %g5
|
|
stxa %g4, [%g0] ASI_AFSR
|
|
membar #Sync
|
|
|
|
CHEETAH_LOG_ERROR
|
|
|
|
rdpr %pil, %g2
|
|
wrpr %g0, 15, %pil
|
|
ba,pt %xcc, etrap_irq
|
|
rd %pc, %g7
|
|
mov %l4, %o1
|
|
mov %l5, %o2
|
|
call cheetah_cee_handler
|
|
add %sp, PTREGS_OFF, %o0
|
|
ba,a,pt %xcc, rtrap_irq
|
|
|
|
/* Our caller has disabled I-cache+D-cache and performed membar Sync. */
|
|
.globl cheetah_deferred_trap
|
|
cheetah_deferred_trap:
|
|
ldxa [%g0] ASI_ESTATE_ERROR_EN, %g2
|
|
andn %g2, ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN, %g2
|
|
stxa %g2, [%g0] ASI_ESTATE_ERROR_EN
|
|
membar #Sync
|
|
|
|
/* Fetch and clear AFSR/AFAR */
|
|
ldxa [%g0] ASI_AFSR, %g4
|
|
ldxa [%g0] ASI_AFAR, %g5
|
|
stxa %g4, [%g0] ASI_AFSR
|
|
membar #Sync
|
|
|
|
CHEETAH_LOG_ERROR
|
|
|
|
rdpr %pil, %g2
|
|
wrpr %g0, 15, %pil
|
|
ba,pt %xcc, etrap_irq
|
|
rd %pc, %g7
|
|
mov %l4, %o1
|
|
mov %l5, %o2
|
|
call cheetah_deferred_handler
|
|
add %sp, PTREGS_OFF, %o0
|
|
ba,a,pt %xcc, rtrap_irq
|
|
|
|
.globl __do_privact
|
|
__do_privact:
|
|
mov TLB_SFSR, %g3
|
|
stxa %g0, [%g3] ASI_DMMU ! Clear FaultValid bit
|
|
membar #Sync
|
|
sethi %hi(109f), %g7
|
|
ba,pt %xcc, etrap
|
|
109: or %g7, %lo(109b), %g7
|
|
call do_privact
|
|
add %sp, PTREGS_OFF, %o0
|
|
ba,pt %xcc, rtrap
|
|
clr %l6
|
|
|
|
.globl do_mna
|
|
do_mna:
|
|
rdpr %tl, %g3
|
|
cmp %g3, 1
|
|
|
|
/* Setup %g4/%g5 now as they are used in the
|
|
* winfixup code.
|
|
*/
|
|
mov TLB_SFSR, %g3
|
|
mov DMMU_SFAR, %g4
|
|
ldxa [%g4] ASI_DMMU, %g4
|
|
ldxa [%g3] ASI_DMMU, %g5
|
|
stxa %g0, [%g3] ASI_DMMU ! Clear FaultValid bit
|
|
membar #Sync
|
|
bgu,pn %icc, winfix_mna
|
|
rdpr %tpc, %g3
|
|
|
|
1: sethi %hi(109f), %g7
|
|
ba,pt %xcc, etrap
|
|
109: or %g7, %lo(109b), %g7
|
|
mov %l4, %o1
|
|
mov %l5, %o2
|
|
call mem_address_unaligned
|
|
add %sp, PTREGS_OFF, %o0
|
|
ba,pt %xcc, rtrap
|
|
clr %l6
|
|
|
|
.globl do_lddfmna
|
|
do_lddfmna:
|
|
sethi %hi(109f), %g7
|
|
mov TLB_SFSR, %g4
|
|
ldxa [%g4] ASI_DMMU, %g5
|
|
stxa %g0, [%g4] ASI_DMMU ! Clear FaultValid bit
|
|
membar #Sync
|
|
mov DMMU_SFAR, %g4
|
|
ldxa [%g4] ASI_DMMU, %g4
|
|
ba,pt %xcc, etrap
|
|
109: or %g7, %lo(109b), %g7
|
|
mov %l4, %o1
|
|
mov %l5, %o2
|
|
call handle_lddfmna
|
|
add %sp, PTREGS_OFF, %o0
|
|
ba,pt %xcc, rtrap
|
|
clr %l6
|
|
|
|
.globl do_stdfmna
|
|
do_stdfmna:
|
|
sethi %hi(109f), %g7
|
|
mov TLB_SFSR, %g4
|
|
ldxa [%g4] ASI_DMMU, %g5
|
|
stxa %g0, [%g4] ASI_DMMU ! Clear FaultValid bit
|
|
membar #Sync
|
|
mov DMMU_SFAR, %g4
|
|
ldxa [%g4] ASI_DMMU, %g4
|
|
ba,pt %xcc, etrap
|
|
109: or %g7, %lo(109b), %g7
|
|
mov %l4, %o1
|
|
mov %l5, %o2
|
|
call handle_stdfmna
|
|
add %sp, PTREGS_OFF, %o0
|
|
ba,pt %xcc, rtrap
|
|
clr %l6
|
|
|
|
.globl breakpoint_trap
|
|
breakpoint_trap:
|
|
call sparc_breakpoint
|
|
add %sp, PTREGS_OFF, %o0
|
|
ba,pt %xcc, rtrap
|
|
nop
|
|
|
|
#if defined(CONFIG_SUNOS_EMUL) || defined(CONFIG_SOLARIS_EMUL) || \
|
|
defined(CONFIG_SOLARIS_EMUL_MODULE)
|
|
/* SunOS uses syscall zero as the 'indirect syscall' it looks
|
|
* like indir_syscall(scall_num, arg0, arg1, arg2...); etc.
|
|
* This is complete brain damage.
|
|
*/
|
|
.globl sunos_indir
|
|
sunos_indir:
|
|
srl %o0, 0, %o0
|
|
mov %o7, %l4
|
|
cmp %o0, NR_SYSCALLS
|
|
blu,a,pt %icc, 1f
|
|
sll %o0, 0x2, %o0
|
|
sethi %hi(sunos_nosys), %l6
|
|
b,pt %xcc, 2f
|
|
or %l6, %lo(sunos_nosys), %l6
|
|
1: sethi %hi(sunos_sys_table), %l7
|
|
or %l7, %lo(sunos_sys_table), %l7
|
|
lduw [%l7 + %o0], %l6
|
|
2: mov %o1, %o0
|
|
mov %o2, %o1
|
|
mov %o3, %o2
|
|
mov %o4, %o3
|
|
mov %o5, %o4
|
|
call %l6
|
|
mov %l4, %o7
|
|
|
|
.globl sunos_getpid
|
|
sunos_getpid:
|
|
call sys_getppid
|
|
nop
|
|
call sys_getpid
|
|
stx %o0, [%sp + PTREGS_OFF + PT_V9_I1]
|
|
b,pt %xcc, ret_sys_call
|
|
stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
|
|
|
|
/* SunOS getuid() returns uid in %o0 and euid in %o1 */
|
|
.globl sunos_getuid
|
|
sunos_getuid:
|
|
call sys32_geteuid16
|
|
nop
|
|
call sys32_getuid16
|
|
stx %o0, [%sp + PTREGS_OFF + PT_V9_I1]
|
|
b,pt %xcc, ret_sys_call
|
|
stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
|
|
|
|
/* SunOS getgid() returns gid in %o0 and egid in %o1 */
|
|
.globl sunos_getgid
|
|
sunos_getgid:
|
|
call sys32_getegid16
|
|
nop
|
|
call sys32_getgid16
|
|
stx %o0, [%sp + PTREGS_OFF + PT_V9_I1]
|
|
b,pt %xcc, ret_sys_call
|
|
stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
|
|
#endif
|
|
|
|
/* SunOS's execv() call only specifies the argv argument, the
|
|
* environment settings are the same as the calling processes.
|
|
*/
|
|
.globl sunos_execv
|
|
sys_execve:
|
|
sethi %hi(sparc_execve), %g1
|
|
ba,pt %xcc, execve_merge
|
|
or %g1, %lo(sparc_execve), %g1
|
|
#ifdef CONFIG_COMPAT
|
|
.globl sys_execve
|
|
sunos_execv:
|
|
stx %g0, [%sp + PTREGS_OFF + PT_V9_I2]
|
|
.globl sys32_execve
|
|
sys32_execve:
|
|
sethi %hi(sparc32_execve), %g1
|
|
or %g1, %lo(sparc32_execve), %g1
|
|
#endif
|
|
execve_merge:
|
|
flushw
|
|
jmpl %g1, %g0
|
|
add %sp, PTREGS_OFF, %o0
|
|
|
|
.globl sys_pipe, sys_sigpause, sys_nis_syscall
|
|
.globl sys_sigsuspend, sys_rt_sigsuspend
|
|
.globl sys_rt_sigreturn
|
|
.globl sys_ptrace
|
|
.globl sys_sigaltstack
|
|
.align 32
|
|
sys_pipe: ba,pt %xcc, sparc_pipe
|
|
add %sp, PTREGS_OFF, %o0
|
|
sys_nis_syscall:ba,pt %xcc, c_sys_nis_syscall
|
|
add %sp, PTREGS_OFF, %o0
|
|
sys_memory_ordering:
|
|
ba,pt %xcc, sparc_memory_ordering
|
|
add %sp, PTREGS_OFF, %o1
|
|
sys_sigaltstack:ba,pt %xcc, do_sigaltstack
|
|
add %i6, STACK_BIAS, %o2
|
|
#ifdef CONFIG_COMPAT
|
|
.globl sys32_sigstack
|
|
sys32_sigstack: ba,pt %xcc, do_sys32_sigstack
|
|
mov %i6, %o2
|
|
.globl sys32_sigaltstack
|
|
sys32_sigaltstack:
|
|
ba,pt %xcc, do_sys32_sigaltstack
|
|
mov %i6, %o2
|
|
#endif
|
|
.align 32
|
|
sys_sigsuspend: add %sp, PTREGS_OFF, %o0
|
|
call do_sigsuspend
|
|
add %o7, 1f-.-4, %o7
|
|
nop
|
|
sys_rt_sigsuspend: /* NOTE: %o0,%o1 have a correct value already */
|
|
add %sp, PTREGS_OFF, %o2
|
|
call do_rt_sigsuspend
|
|
add %o7, 1f-.-4, %o7
|
|
nop
|
|
#ifdef CONFIG_COMPAT
|
|
.globl sys32_rt_sigsuspend
|
|
sys32_rt_sigsuspend: /* NOTE: %o0,%o1 have a correct value already */
|
|
srl %o0, 0, %o0
|
|
add %sp, PTREGS_OFF, %o2
|
|
call do_rt_sigsuspend32
|
|
add %o7, 1f-.-4, %o7
|
|
#endif
|
|
/* NOTE: %o0 has a correct value already */
|
|
sys_sigpause: add %sp, PTREGS_OFF, %o1
|
|
call do_sigpause
|
|
add %o7, 1f-.-4, %o7
|
|
nop
|
|
#ifdef CONFIG_COMPAT
|
|
.globl sys32_sigreturn
|
|
sys32_sigreturn:
|
|
add %sp, PTREGS_OFF, %o0
|
|
call do_sigreturn32
|
|
add %o7, 1f-.-4, %o7
|
|
nop
|
|
#endif
|
|
sys_rt_sigreturn:
|
|
add %sp, PTREGS_OFF, %o0
|
|
call do_rt_sigreturn
|
|
add %o7, 1f-.-4, %o7
|
|
nop
|
|
#ifdef CONFIG_COMPAT
|
|
.globl sys32_rt_sigreturn
|
|
sys32_rt_sigreturn:
|
|
add %sp, PTREGS_OFF, %o0
|
|
call do_rt_sigreturn32
|
|
add %o7, 1f-.-4, %o7
|
|
nop
|
|
#endif
|
|
sys_ptrace: add %sp, PTREGS_OFF, %o0
|
|
call do_ptrace
|
|
add %o7, 1f-.-4, %o7
|
|
nop
|
|
.align 32
|
|
1: ldx [%curptr + TI_FLAGS], %l5
|
|
andcc %l5, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT), %g0
|
|
be,pt %icc, rtrap
|
|
clr %l6
|
|
add %sp, PTREGS_OFF, %o0
|
|
call syscall_trace
|
|
mov 1, %o1
|
|
|
|
ba,pt %xcc, rtrap
|
|
clr %l6
|
|
|
|
/* This is how fork() was meant to be done, 8 instruction entry.
|
|
*
|
|
* I questioned the following code briefly, let me clear things
|
|
* up so you must not reason on it like I did.
|
|
*
|
|
* Know the fork_kpsr etc. we use in the sparc32 port? We don't
|
|
* need it here because the only piece of window state we copy to
|
|
* the child is the CWP register. Even if the parent sleeps,
|
|
* we are safe because we stuck it into pt_regs of the parent
|
|
* so it will not change.
|
|
*
|
|
* XXX This raises the question, whether we can do the same on
|
|
* XXX sparc32 to get rid of fork_kpsr _and_ fork_kwim. The
|
|
* XXX answer is yes. We stick fork_kpsr in UREG_G0 and
|
|
* XXX fork_kwim in UREG_G1 (global registers are considered
|
|
* XXX volatile across a system call in the sparc ABI I think
|
|
* XXX if it isn't we can use regs->y instead, anyone who depends
|
|
* XXX upon the Y register being preserved across a fork deserves
|
|
* XXX to lose).
|
|
*
|
|
* In fact we should take advantage of that fact for other things
|
|
* during system calls...
|
|
*/
|
|
.globl sys_fork, sys_vfork, sys_clone, sparc_exit
|
|
.globl ret_from_syscall
|
|
.align 32
|
|
sys_vfork: /* Under Linux, vfork and fork are just special cases of clone. */
|
|
sethi %hi(0x4000 | 0x0100 | SIGCHLD), %o0
|
|
or %o0, %lo(0x4000 | 0x0100 | SIGCHLD), %o0
|
|
ba,pt %xcc, sys_clone
|
|
sys_fork: clr %o1
|
|
mov SIGCHLD, %o0
|
|
sys_clone: flushw
|
|
movrz %o1, %fp, %o1
|
|
mov 0, %o3
|
|
ba,pt %xcc, sparc_do_fork
|
|
add %sp, PTREGS_OFF, %o2
|
|
ret_from_syscall:
|
|
/* Clear current_thread_info()->new_child, and
|
|
* check performance counter stuff too.
|
|
*/
|
|
stb %g0, [%g6 + TI_NEW_CHILD]
|
|
ldx [%g6 + TI_FLAGS], %l0
|
|
call schedule_tail
|
|
mov %g7, %o0
|
|
andcc %l0, _TIF_PERFCTR, %g0
|
|
be,pt %icc, 1f
|
|
nop
|
|
ldx [%g6 + TI_PCR], %o7
|
|
wr %g0, %o7, %pcr
|
|
|
|
/* Blackbird errata workaround. See commentary in
|
|
* smp.c:smp_percpu_timer_interrupt() for more
|
|
* information.
|
|
*/
|
|
ba,pt %xcc, 99f
|
|
nop
|
|
.align 64
|
|
99: wr %g0, %g0, %pic
|
|
rd %pic, %g0
|
|
|
|
1: b,pt %xcc, ret_sys_call
|
|
ldx [%sp + PTREGS_OFF + PT_V9_I0], %o0
|
|
sparc_exit: wrpr %g0, (PSTATE_RMO | PSTATE_PEF | PSTATE_PRIV), %pstate
|
|
rdpr %otherwin, %g1
|
|
rdpr %cansave, %g3
|
|
add %g3, %g1, %g3
|
|
wrpr %g3, 0x0, %cansave
|
|
wrpr %g0, 0x0, %otherwin
|
|
wrpr %g0, (PSTATE_RMO | PSTATE_PEF | PSTATE_PRIV | PSTATE_IE), %pstate
|
|
ba,pt %xcc, sys_exit
|
|
stb %g0, [%g6 + TI_WSAVED]
|
|
|
|
linux_sparc_ni_syscall:
|
|
sethi %hi(sys_ni_syscall), %l7
|
|
b,pt %xcc, 4f
|
|
or %l7, %lo(sys_ni_syscall), %l7
|
|
|
|
linux_syscall_trace32:
|
|
add %sp, PTREGS_OFF, %o0
|
|
call syscall_trace
|
|
clr %o1
|
|
srl %i0, 0, %o0
|
|
srl %i4, 0, %o4
|
|
srl %i1, 0, %o1
|
|
srl %i2, 0, %o2
|
|
b,pt %xcc, 2f
|
|
srl %i3, 0, %o3
|
|
|
|
linux_syscall_trace:
|
|
add %sp, PTREGS_OFF, %o0
|
|
call syscall_trace
|
|
clr %o1
|
|
mov %i0, %o0
|
|
mov %i1, %o1
|
|
mov %i2, %o2
|
|
mov %i3, %o3
|
|
b,pt %xcc, 2f
|
|
mov %i4, %o4
|
|
|
|
|
|
/* Linux 32-bit and SunOS system calls enter here... */
|
|
.align 32
|
|
.globl linux_sparc_syscall32
|
|
linux_sparc_syscall32:
|
|
/* Direct access to user regs, much faster. */
|
|
cmp %g1, NR_SYSCALLS ! IEU1 Group
|
|
bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI
|
|
srl %i0, 0, %o0 ! IEU0
|
|
sll %g1, 2, %l4 ! IEU0 Group
|
|
srl %i4, 0, %o4 ! IEU1
|
|
lduw [%l7 + %l4], %l7 ! Load
|
|
srl %i1, 0, %o1 ! IEU0 Group
|
|
ldx [%curptr + TI_FLAGS], %l0 ! Load
|
|
|
|
srl %i5, 0, %o5 ! IEU1
|
|
srl %i2, 0, %o2 ! IEU0 Group
|
|
andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT), %g0
|
|
bne,pn %icc, linux_syscall_trace32 ! CTI
|
|
mov %i0, %l5 ! IEU1
|
|
call %l7 ! CTI Group brk forced
|
|
srl %i3, 0, %o3 ! IEU0
|
|
ba,a,pt %xcc, 3f
|
|
|
|
/* Linux native and SunOS system calls enter here... */
|
|
.align 32
|
|
.globl linux_sparc_syscall, ret_sys_call
|
|
linux_sparc_syscall:
|
|
/* Direct access to user regs, much faster. */
|
|
cmp %g1, NR_SYSCALLS ! IEU1 Group
|
|
bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI
|
|
mov %i0, %o0 ! IEU0
|
|
sll %g1, 2, %l4 ! IEU0 Group
|
|
mov %i1, %o1 ! IEU1
|
|
lduw [%l7 + %l4], %l7 ! Load
|
|
4: mov %i2, %o2 ! IEU0 Group
|
|
ldx [%curptr + TI_FLAGS], %l0 ! Load
|
|
|
|
mov %i3, %o3 ! IEU1
|
|
mov %i4, %o4 ! IEU0 Group
|
|
andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT), %g0
|
|
bne,pn %icc, linux_syscall_trace ! CTI Group
|
|
mov %i0, %l5 ! IEU0
|
|
2: call %l7 ! CTI Group brk forced
|
|
mov %i5, %o5 ! IEU0
|
|
nop
|
|
|
|
3: stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
|
|
ret_sys_call:
|
|
ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %g3
|
|
ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
|
|
sra %o0, 0, %o0
|
|
mov %ulo(TSTATE_XCARRY | TSTATE_ICARRY), %g2
|
|
sllx %g2, 32, %g2
|
|
|
|
/* Check if force_successful_syscall_return()
|
|
* was invoked.
|
|
*/
|
|
ldub [%curptr + TI_SYS_NOERROR], %l0
|
|
brz,pt %l0, 1f
|
|
nop
|
|
ba,pt %xcc, 80f
|
|
stb %g0, [%curptr + TI_SYS_NOERROR]
|
|
|
|
1:
|
|
cmp %o0, -ERESTART_RESTARTBLOCK
|
|
bgeu,pn %xcc, 1f
|
|
andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT), %l6
|
|
80:
|
|
/* System call success, clear Carry condition code. */
|
|
andn %g3, %g2, %g3
|
|
stx %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]
|
|
bne,pn %icc, linux_syscall_trace2
|
|
add %l1, 0x4, %l2 ! npc = npc+4
|
|
stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
|
|
ba,pt %xcc, rtrap_clr_l6
|
|
stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
|
|
|
|
1:
|
|
/* System call failure, set Carry condition code.
|
|
* Also, get abs(errno) to return to the process.
|
|
*/
|
|
andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT), %l6
|
|
sub %g0, %o0, %o0
|
|
or %g3, %g2, %g3
|
|
stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
|
|
mov 1, %l6
|
|
stx %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]
|
|
bne,pn %icc, linux_syscall_trace2
|
|
add %l1, 0x4, %l2 ! npc = npc+4
|
|
stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
|
|
|
|
b,pt %xcc, rtrap
|
|
stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
|
|
linux_syscall_trace2:
|
|
add %sp, PTREGS_OFF, %o0
|
|
call syscall_trace
|
|
mov 1, %o1
|
|
stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
|
|
ba,pt %xcc, rtrap
|
|
stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
|
|
|
|
.align 32
|
|
.globl __flushw_user
|
|
__flushw_user:
|
|
rdpr %otherwin, %g1
|
|
brz,pn %g1, 2f
|
|
clr %g2
|
|
1: save %sp, -128, %sp
|
|
rdpr %otherwin, %g1
|
|
brnz,pt %g1, 1b
|
|
add %g2, 1, %g2
|
|
1: sub %g2, 1, %g2
|
|
brnz,pt %g2, 1b
|
|
restore %g0, %g0, %g0
|
|
2: retl
|
|
nop
|