entry.S
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- /* $Id: entry.S,v 1.141 2001/12/05 23:56:32 davem Exp $
- * arch/sparc64/kernel/entry.S: Sparc64 trap low-level entry points.
- *
- * Copyright (C) 1995,1997 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
- * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
- * Copyright (C) 1996,98,99 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
- */
- #include <linux/config.h>
- #include <linux/errno.h>
- #include <asm/head.h>
- #include <asm/asi.h>
- #include <asm/smp.h>
- #include <asm/ptrace.h>
- #include <asm/page.h>
- #include <asm/signal.h>
- #include <asm/pgtable.h>
- #include <asm/processor.h>
- #include <asm/visasm.h>
- #include <asm/estate.h>
- /* #define SYSCALL_TRACING 1 */
- #define curptr g6
- #define NR_SYSCALLS 256 /* Each OS is different... */
- .text
- .align 32
- .globl sparc64_vpte_patchme1
- .globl sparc64_vpte_patchme2
- /*
- * On a second level vpte miss, check whether the original fault is to the OBP
- * range (note that this is only possible for instruction miss, data misses to
- * obp range do not use vpte). If so, go back directly to the faulting address.
- * This is because we want to read the tpc, otherwise we have no way of knowing
- * the 8k aligned faulting address if we are using >8k kernel pagesize. This also
- * ensures no vpte range addresses are dropped into tlb while obp is executing
- * (see inherit_locked_prom_mappings() rant).
- */
- sparc64_vpte_nucleus:
- mov 0xf, %g5
- sllx %g5, 28, %g5 ! Load 0xf0000000
- cmp %g4, %g5 ! Is addr >= LOW_OBP_ADDRESS?
- blu,pn %xcc, sparc64_vpte_patchme1
- mov 0x1, %g5
- sllx %g5, 32, %g5 ! Load 0x100000000
- cmp %g4, %g5 ! Is addr < HI_OBP_ADDRESS?
- blu,pn %xcc, obp_iaddr_patch
- nop
- sparc64_vpte_patchme1:
- sethi %hi(0), %g5 ! This has to be patched
- sparc64_vpte_patchme2:
- or %g5, %lo(0), %g5 ! This is patched too
- ba,pt %xcc, sparc64_kpte_continue ! Part of dtlb_backend
- add %g1, %g1, %g1 ! Finish PMD offset adjustment
- vpte_noent:
- mov TLB_SFSR, %g1 ! Restore %g1 value
- stxa %g4, [%g1 + %g1] ASI_DMMU ! Restore previous TAG_ACCESS
- done ! Slick trick
- .globl obp_iaddr_patch
- .globl obp_daddr_patch
- obp_iaddr_patch:
- sethi %hi(0), %g5 ! This and following is patched
- or %g5, %lo(0), %g5 ! g5 now holds obp pmd base physaddr
- wrpr %g0, 1, %tl ! Behave as if we are at TL0
- rdpr %tpc, %g4 ! Find original faulting iaddr
- srlx %g4, 13, %g4 ! Throw out context bits
- sllx %g4, 13, %g4 ! g4 has vpn + ctx0 now
- mov TLB_SFSR, %g1 ! Restore %g1 value
- stxa %g4, [%g1 + %g1] ASI_IMMU ! Restore previous TAG_ACCESS
- srlx %g4, 23, %g6 ! Find pmd number
- and %g6, 0x7ff, %g6 ! Find pmd number
- sllx %g6, 2, %g6 ! Find pmd offset
- lduwa [%g5 + %g6] ASI_PHYS_USE_EC, %g5! Load pmd, ie pagetable physaddr
- brz,pn %g5, longpath ! Kill the PROM ? :-)
- sllx %g5, 11, %g5 ! Shift into place
- srlx %g4, 13, %g6 ! find pte number in pagetable
- and %g6, 0x3ff, %g6 ! find pte number in pagetable
- sllx %g6, 3, %g6 ! find pte offset in pagetable
- ldxa [%g5 + %g6] ASI_PHYS_USE_EC, %g5! Load pte
- brgez,pn %g5, longpath ! Kill the PROM ? :-)
- nop
- stxa %g5, [%g0] ASI_ITLB_DATA_IN ! put into tlb
- retry ! go back to original fault
- obp_daddr_patch:
- sethi %hi(0), %g5 ! This and following is patched
- or %g5, %lo(0), %g5 ! g5 now holds obp pmd base physaddr
- srlx %g4, 23, %g6 ! Find pmd number
- and %g6, 0x7ff, %g6 ! Find pmd number
- sllx %g6, 2, %g6 ! Find pmd offset
- lduwa [%g5 + %g6] ASI_PHYS_USE_EC, %g5! Load pmd, ie pagetable physaddr
- brz,pn %g5, longpath
- sllx %g5, 11, %g5 ! Shift into place
- srlx %g4, 13, %g6 ! find pte number in pagetable
- and %g6, 0x3ff, %g6 ! find pte number in pagetable
- sllx %g6, 3, %g6 ! find pte offset in pagetable
- ldxa [%g5 + %g6] ASI_PHYS_USE_EC, %g5! Load pte
- brgez,pn %g5, longpath
- nop
- stxa %g5, [%g0] ASI_DTLB_DATA_IN ! put into tlb
- retry
- /*
- * On a first level data miss, check whether this is to the OBP range (note that
- * such accesses can be made by prom, as well as by kernel using prom_getproperty
- * on "address"), and if so, do not use vpte access ... rather, use information
- * saved during inherit_prom_mappings() using 8k pagesize.
- */
- kvmap:
- mov 0xf, %g5
- sllx %g5, 28, %g5 ! Load 0xf0000000
- cmp %g4, %g5 ! Is addr >= LOW_OBP_ADDRESS?
- blu,pn %xcc, vmalloc_addr
- mov 0x1, %g5
- sllx %g5, 32, %g5 ! Load 0x100000000
- cmp %g4, %g5 ! Is addr < HI_OBP_ADDRESS?
- blu,pn %xcc, obp_daddr_patch
- nop
- vmalloc_addr: ! vmalloc addr accessed
- ldxa [%g3 + %g6] ASI_N, %g5 ! Yep, load k-vpte
- brgez,pn %g5, longpath ! Valid, load into TLB
- nop
- stxa %g5, [%g0] ASI_DTLB_DATA_IN ! Reload TLB
- retry
- /* This is trivial with the new code... */
- .globl do_fpdis
- do_fpdis:
- sethi %hi(TSTATE_PEF), %g4 ! IEU0
- rdpr %tstate, %g5
- andcc %g5, %g4, %g0
- be,pt %xcc, 1f
- nop
- rd %fprs, %g5
- andcc %g5, FPRS_FEF, %g0
- be,pt %xcc, 1f
- nop
- /* Legal state when DCR_IFPOE is set in Cheetah %dcr. */
- sethi %hi(109f), %g7
- ba,pt %xcc, etrap
- 109: or %g7, %lo(109b), %g7
- add %g0, %g0, %g0
- ba,a,pt %xcc, rtrap_clr_l6
- 1: ldub [%g6 + AOFF_task_thread + AOFF_thread_fpsaved], %g5 ! Load Group
- wr %g0, FPRS_FEF, %fprs ! LSU Group+4bubbles
- andcc %g5, FPRS_FEF, %g0 ! IEU1 Group
- be,a,pt %icc, 1f ! CTI
- clr %g7 ! IEU0
- ldx [%g6 + AOFF_task_thread + AOFF_thread_gsr], %g7 ! Load Group
- 1: andcc %g5, FPRS_DL, %g0 ! IEU1
- bne,pn %icc, 2f ! CTI
- fzero %f0 ! FPA
- andcc %g5, FPRS_DU, %g0 ! IEU1 Group
- bne,pn %icc, 1f ! CTI
- fzero %f2 ! FPA
- faddd %f0, %f2, %f4
- fmuld %f0, %f2, %f6
- faddd %f0, %f2, %f8
- fmuld %f0, %f2, %f10
- faddd %f0, %f2, %f12
- fmuld %f0, %f2, %f14
- faddd %f0, %f2, %f16
- fmuld %f0, %f2, %f18
- faddd %f0, %f2, %f20
- fmuld %f0, %f2, %f22
- faddd %f0, %f2, %f24
- fmuld %f0, %f2, %f26
- faddd %f0, %f2, %f28
- fmuld %f0, %f2, %f30
- faddd %f0, %f2, %f32
- fmuld %f0, %f2, %f34
- faddd %f0, %f2, %f36
- fmuld %f0, %f2, %f38
- faddd %f0, %f2, %f40
- fmuld %f0, %f2, %f42
- faddd %f0, %f2, %f44
- fmuld %f0, %f2, %f46
- faddd %f0, %f2, %f48
- fmuld %f0, %f2, %f50
- faddd %f0, %f2, %f52
- fmuld %f0, %f2, %f54
- faddd %f0, %f2, %f56
- fmuld %f0, %f2, %f58
- b,pt %xcc, fpdis_exit2
- faddd %f0, %f2, %f60
- 1: mov SECONDARY_CONTEXT, %g3
- add %g6, AOFF_task_fpregs + 0x80, %g1
- faddd %f0, %f2, %f4
- fmuld %f0, %f2, %f6
- ldxa [%g3] ASI_DMMU, %g5
- add %g6, AOFF_task_fpregs + 0xc0, %g2
- stxa %g0, [%g3] ASI_DMMU
- membar #Sync
- faddd %f0, %f2, %f8
- fmuld %f0, %f2, %f10
- ldda [%g1] ASI_BLK_S, %f32 ! grrr, where is ASI_BLK_NUCLEUS 8-(
- ldda [%g2] ASI_BLK_S, %f48
- faddd %f0, %f2, %f12
- fmuld %f0, %f2, %f14
- faddd %f0, %f2, %f16
- fmuld %f0, %f2, %f18
- faddd %f0, %f2, %f20
- fmuld %f0, %f2, %f22
- faddd %f0, %f2, %f24
- fmuld %f0, %f2, %f26
- faddd %f0, %f2, %f28
- fmuld %f0, %f2, %f30
- b,pt %xcc, fpdis_exit
- membar #Sync
- 2: andcc %g5, FPRS_DU, %g0
- bne,pt %icc, 3f
- fzero %f32
- mov SECONDARY_CONTEXT, %g3
- fzero %f34
- ldxa [%g3] ASI_DMMU, %g5
- add %g6, AOFF_task_fpregs, %g1
- stxa %g0, [%g3] ASI_DMMU
- membar #Sync
- add %g6, AOFF_task_fpregs + 0x40, %g2
- faddd %f32, %f34, %f36
- fmuld %f32, %f34, %f38
- ldda [%g1] ASI_BLK_S, %f0 ! grrr, where is ASI_BLK_NUCLEUS 8-(
- ldda [%g2] ASI_BLK_S, %f16
- faddd %f32, %f34, %f40
- fmuld %f32, %f34, %f42
- faddd %f32, %f34, %f44
- fmuld %f32, %f34, %f46
- faddd %f32, %f34, %f48
- fmuld %f32, %f34, %f50
- faddd %f32, %f34, %f52
- fmuld %f32, %f34, %f54
- faddd %f32, %f34, %f56
- fmuld %f32, %f34, %f58
- faddd %f32, %f34, %f60
- fmuld %f32, %f34, %f62
- ba,pt %xcc, fpdis_exit
- membar #Sync
- 3: mov SECONDARY_CONTEXT, %g3
- add %g6, AOFF_task_fpregs, %g1
- ldxa [%g3] ASI_DMMU, %g5
- mov 0x40, %g2
- stxa %g0, [%g3] ASI_DMMU
- membar #Sync
- ldda [%g1] ASI_BLK_S, %f0 ! grrr, where is ASI_BLK_NUCLEUS 8-(
- ldda [%g1 + %g2] ASI_BLK_S, %f16
- add %g1, 0x80, %g1
- ldda [%g1] ASI_BLK_S, %f32
- ldda [%g1 + %g2] ASI_BLK_S, %f48
- membar #Sync
- fpdis_exit:
- stxa %g5, [%g3] ASI_DMMU
- membar #Sync
- fpdis_exit2:
- wr %g7, 0, %gsr
- ldx [%g6 + AOFF_task_thread + AOFF_thread_xfsr], %fsr
- rdpr %tstate, %g3
- or %g3, %g4, %g3 ! anal...
- wrpr %g3, %tstate
- wr %g0, FPRS_FEF, %fprs ! clean DU/DL bits
- retry
- .align 32
- fp_other_bounce:
- call do_fpother
- add %sp, STACK_BIAS + REGWIN_SZ, %o0
- ba,pt %xcc, rtrap
- clr %l6
- .globl do_fpother_check_fitos
- .align 32
- do_fpother_check_fitos:
- sethi %hi(fp_other_bounce - 4), %g7
- or %g7, %lo(fp_other_bounce - 4), %g7
- /* NOTE: Need to preserve %g7 until we fully commit
- * to the fitos fixup.
- */
- stx %fsr, [%g6 + AOFF_task_thread + AOFF_thread_xfsr]
- rdpr %tstate, %g3
- andcc %g3, TSTATE_PRIV, %g0
- bne,pn %xcc, do_fptrap_after_fsr
- nop
- ldx [%g6 + AOFF_task_thread + AOFF_thread_xfsr], %g3
- srlx %g3, 14, %g1
- and %g1, 7, %g1
- cmp %g1, 2 ! Unfinished FP-OP
- bne,pn %xcc, do_fptrap_after_fsr
- sethi %hi(1 << 23), %g1 ! Inexact
- andcc %g3, %g1, %g0
- bne,pn %xcc, do_fptrap_after_fsr
- rdpr %tpc, %g1
- lduwa [%g1] ASI_AIUP, %g3 ! This cannot ever fail
- #define FITOS_MASK 0xc1f83fe0
- #define FITOS_COMPARE 0x81a01880
- sethi %hi(FITOS_MASK), %g1
- or %g1, %lo(FITOS_MASK), %g1
- and %g3, %g1, %g1
- sethi %hi(FITOS_COMPARE), %g2
- or %g2, %lo(FITOS_COMPARE), %g2
- cmp %g1, %g2
- bne,pn %xcc, do_fptrap_after_fsr
- nop
- std %f62, [%g6 + AOFF_task_fpregs + (62 * 4)]
- sethi %hi(fitos_table_1), %g1
- and %g3, 0x1f, %g2
- or %g1, %lo(fitos_table_1), %g1
- sllx %g2, 2, %g2
- jmpl %g1 + %g2, %g0
- ba,pt %xcc, fitos_emul_continue
- fitos_table_1:
- fitod %f0, %f62
- fitod %f1, %f62
- fitod %f2, %f62
- fitod %f3, %f62
- fitod %f4, %f62
- fitod %f5, %f62
- fitod %f6, %f62
- fitod %f7, %f62
- fitod %f8, %f62
- fitod %f9, %f62
- fitod %f10, %f62
- fitod %f11, %f62
- fitod %f12, %f62
- fitod %f13, %f62
- fitod %f14, %f62
- fitod %f15, %f62
- fitod %f16, %f62
- fitod %f17, %f62
- fitod %f18, %f62
- fitod %f19, %f62
- fitod %f20, %f62
- fitod %f21, %f62
- fitod %f22, %f62
- fitod %f23, %f62
- fitod %f24, %f62
- fitod %f25, %f62
- fitod %f26, %f62
- fitod %f27, %f62
- fitod %f28, %f62
- fitod %f29, %f62
- fitod %f30, %f62
- fitod %f31, %f62
- fitos_emul_continue:
- sethi %hi(fitos_table_2), %g1
- srl %g3, 25, %g2
- or %g1, %lo(fitos_table_2), %g1
- and %g2, 0x1f, %g2
- sllx %g2, 2, %g2
- jmpl %g1 + %g2, %g0
- ba,pt %xcc, fitos_emul_fini
- fitos_table_2:
- fdtos %f62, %f0
- fdtos %f62, %f1
- fdtos %f62, %f2
- 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 + AOFF_task_fpregs + (62 * 4)], %f62
- done
- .globl do_fptrap
- .align 32
- do_fptrap:
- stx %fsr, [%g6 + AOFF_task_thread + AOFF_thread_xfsr]
- do_fptrap_after_fsr:
- ldub [%g6 + AOFF_task_thread + AOFF_thread_fpsaved], %g3
- rd %fprs, %g1
- or %g3, %g1, %g3
- stb %g3, [%g6 + AOFF_task_thread + AOFF_thread_fpsaved]
- rd %gsr, %g3
- stx %g3, [%g6 + AOFF_task_thread + AOFF_thread_gsr]
- mov SECONDARY_CONTEXT, %g3
- add %g6, AOFF_task_fpregs, %g2
- ldxa [%g3] ASI_DMMU, %g5
- stxa %g0, [%g3] ASI_DMMU
- membar #Sync
- 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
- /* 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
- ldx [%g3 + 0x08], %g2 /* irq_info */
- ldub [%g3 + 0x04], %g4 /* pil */
- brz,pn %g2, do_ivec_spurious
- 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
- do_ivec_spurious:
- stw %g3, [%g6 + 0x00] /* irq_work(cpu, 0) = bucket */
- rdpr %pstate, %g5
- wrpr %g5, PSTATE_IG | PSTATE_AG, %pstate
- sethi %hi(109f), %g7
- ba,pt %xcc, etrap
- 109: or %g7, %lo(109b), %g7
- call catch_disabled_ivec
- add %sp, STACK_BIAS + REGWIN_SZ, %o0
- ba,pt %xcc, rtrap
- clr %l6
- .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, STACK_BIAS + REGWIN_SZ, %o0
- ba,pt %xcc, rtrap
- clr %l6
- #ifdef CONFIG_BLK_DEV_FD
- .globl floppy_hardint
- floppy_hardint:
- wr %g0, (1 << 11), %clear_softint
- sethi %hi(doing_pdma), %g1
- ld [%g1 + %lo(doing_pdma)], %g2
- brz,pn %g2, floppy_dosoftint
- sethi %hi(fdc_status), %g3
- ldx [%g3 + %lo(fdc_status)], %g3
- sethi %hi(pdma_vaddr), %g5
- ldx [%g5 + %lo(pdma_vaddr)], %g4
- sethi %hi(pdma_size), %g5
- ldx [%g5 + %lo(pdma_size)], %g5
- next_byte:
- lduba [%g3] ASI_PHYS_BYPASS_EC_E, %g7
- andcc %g7, 0x80, %g0
- be,pn %icc, floppy_fifo_emptied
- andcc %g7, 0x20, %g0
- be,pn %icc, floppy_overrun
- andcc %g7, 0x40, %g0
- be,pn %icc, floppy_write
- sub %g5, 1, %g5
- inc %g3
- lduba [%g3] ASI_PHYS_BYPASS_EC_E, %g7
- dec %g3
- orcc %g0, %g5, %g0
- stb %g7, [%g4]
- bne,pn %xcc, next_byte
- add %g4, 1, %g4
- b,pt %xcc, floppy_tdone
- nop
- floppy_write:
- ldub [%g4], %g7
- orcc %g0, %g5, %g0
- inc %g3
- stba %g7, [%g3] ASI_PHYS_BYPASS_EC_E
- dec %g3
- bne,pn %xcc, next_byte
- add %g4, 1, %g4
- floppy_tdone:
- sethi %hi(pdma_vaddr), %g1
- stx %g4, [%g1 + %lo(pdma_vaddr)]
- sethi %hi(pdma_size), %g1
- stx %g5, [%g1 + %lo(pdma_size)]
- sethi %hi(auxio_register), %g1
- ldx [%g1 + %lo(auxio_register)], %g7
- lduba [%g7] ASI_PHYS_BYPASS_EC_E, %g5
- or %g5, 0xc2, %g5
- stba %g5, [%g7] ASI_PHYS_BYPASS_EC_E
- andn %g5, 0x02, %g5
- nop; nop; nop; nop; nop; nop;
- nop; nop; nop; nop; nop; nop;
- stba %g5, [%g7] ASI_PHYS_BYPASS_EC_E
- sethi %hi(doing_pdma), %g1
- b,pt %xcc, floppy_dosoftint
- st %g0, [%g1 + %lo(doing_pdma)]
- floppy_fifo_emptied:
- sethi %hi(pdma_vaddr), %g1
- stx %g4, [%g1 + %lo(pdma_vaddr)]
- sethi %hi(pdma_size), %g1
- stx %g5, [%g1 + %lo(pdma_size)]
- sethi %hi(irq_action), %g1
- or %g1, %lo(irq_action), %g1
- ldx [%g1 + (11 << 3)], %g3 ! irqaction[floppy_irq]
- ldx [%g3 + 0x08], %g4 ! action->flags>>48==ino
- sethi %hi(ivector_table), %g3
- srlx %g4, 48, %g4
- or %g3, %lo(ivector_table), %g3
- sllx %g4, 5, %g4
- ldx [%g3 + %g4], %g4 ! &ivector_table[ino]
- ldx [%g4 + 0x10], %g4 ! bucket->iclr
- stwa %g0, [%g4] ASI_PHYS_BYPASS_EC_E ! ICLR_IDLE
- membar #Sync ! probably not needed...
- retry
- floppy_overrun:
- sethi %hi(pdma_vaddr), %g1
- stx %g4, [%g1 + %lo(pdma_vaddr)]
- sethi %hi(pdma_size), %g1
- stx %g5, [%g1 + %lo(pdma_size)]
- sethi %hi(doing_pdma), %g1
- st %g0, [%g1 + %lo(doing_pdma)]
- floppy_dosoftint:
- rdpr %pil, %g2
- wrpr %g0, 15, %pil
- sethi %hi(109f), %g7
- b,pt %xcc, etrap_irq
- 109: or %g7, %lo(109b), %g7
- mov 11, %o0
- mov 0, %o1
- call sparc_floppy_irq
- add %sp, STACK_BIAS + REGWIN_SZ, %o2
- b,pt %xcc, rtrap
- clr %l6
- #endif /* CONFIG_BLK_DEV_FD */
- /* XXX Here is stuff we still need to write... -DaveM XXX */
- .globl netbsd_syscall
- netbsd_syscall:
- retl
- nop
- /* These next few routines must be sure to clear the
- * SFSR FaultValid bit so that the fast tlb data protection
- * handler does not flush the wrong context and lock up the
- * box.
- */
- .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
- ba,pt %xcc, winfix_dax
- rdpr %tpc, %g3
- __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, STACK_BIAS + REGWIN_SZ, %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
- mov DMMU_SFAR, %g5
- ldxa [%g3] ASI_DMMU, %g4 ! Get SFSR
- ldxa [%g5] ASI_DMMU, %g5 ! Get SFAR
- 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, STACK_BIAS + REGWIN_SZ, %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
- mov DMMU_SFAR, %g5
- ldxa [%g3] ASI_DMMU, %g4 ! Get SFSR
- ldxa [%g5] ASI_DMMU, %g5 ! Get SFAR
- 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, STACK_BIAS + REGWIN_SZ, %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, STACK_BIAS + REGWIN_SZ, %o2
- ba,a,pt %xcc, rtrap_clr_l6
- /* 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. */
- ldxa [%g0] ASI_SAFARI_CONFIG, %g2;
- srlx %g2, 17, %g2;
- and %g2, 0x3ff, %g2;
- 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, STACK_BIAS + REGWIN_SZ, %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, STACK_BIAS + REGWIN_SZ, %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, STACK_BIAS + REGWIN_SZ, %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, STACK_BIAS + REGWIN_SZ, %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 occured 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, STACK_BIAS + REGWIN_SZ, %o0
- ba,a,pt %xcc, rtrap_clr_l6
- /* 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, STACK_BIAS + REGWIN_SZ, %o0
- ba,a,pt %xcc, rtrap_clr_l6
- /* 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, STACK_BIAS + REGWIN_SZ, %o0
- ba,a,pt %xcc, rtrap_clr_l6
- .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, STACK_BIAS + REGWIN_SZ, %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, STACK_BIAS + REGWIN_SZ, %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, STACK_BIAS + REGWIN_SZ, %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, STACK_BIAS + REGWIN_SZ, %o0
- ba,pt %xcc, rtrap
- clr %l6
- .globl breakpoint_trap
- breakpoint_trap:
- call sparc_breakpoint
- add %sp, STACK_BIAS + REGWIN_SZ, %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 + STACK_BIAS + REGWIN_SZ + PT_V9_I1]
- b,pt %xcc, ret_sys_call
- stx %o0, [%sp + STACK_BIAS + REGWIN_SZ + 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 + STACK_BIAS + REGWIN_SZ + PT_V9_I1]
- b,pt %xcc, ret_sys_call
- stx %o0, [%sp + STACK_BIAS + REGWIN_SZ + 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 + STACK_BIAS + REGWIN_SZ + PT_V9_I1]
- b,pt %xcc, ret_sys_call
- stx %o0, [%sp + STACK_BIAS + REGWIN_SZ + 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, sys32_execve
- sys_execve:
- sethi %hi(sparc_execve), %g1
- ba,pt %xcc, execve_merge
- or %g1, %lo(sparc_execve), %g1
- sunos_execv:
- stx %g0, [%sp + STACK_BIAS + REGWIN_SZ + PT_V9_I2]
- sys32_execve:
- sethi %hi(sparc32_execve), %g1
- or %g1, %lo(sparc32_execve), %g1
- execve_merge:
- flushw
- jmpl %g1, %g0
- add %sp, STACK_BIAS + REGWIN_SZ, %o0
- .globl sys_pipe, sys_sigpause, sys_nis_syscall
- .globl sys_sigsuspend, sys_rt_sigsuspend, sys32_rt_sigsuspend
- .globl sys_rt_sigreturn
- .globl sys32_sigreturn, sys32_rt_sigreturn
- .globl sys32_execve, sys_ptrace
- .globl sys_sigaltstack, sys32_sigaltstack
- .globl sys32_sigstack
- .align 32
- sys_pipe: ba,pt %xcc, sparc_pipe
- add %sp, STACK_BIAS + REGWIN_SZ, %o0
- sys_nis_syscall:ba,pt %xcc, c_sys_nis_syscall
- add %sp, STACK_BIAS + REGWIN_SZ, %o0
- sys_memory_ordering:
- ba,pt %xcc, sparc_memory_ordering
- add %sp, STACK_BIAS + REGWIN_SZ, %o1
- sys_sigaltstack:ba,pt %xcc, do_sigaltstack
- add %i6, STACK_BIAS, %o2
- sys32_sigstack: ba,pt %xcc, do_sys32_sigstack
- mov %i6, %o2
- sys32_sigaltstack:
- ba,pt %xcc, do_sys32_sigaltstack
- mov %i6, %o2
- .align 32
- sys_sigsuspend: add %sp, STACK_BIAS + REGWIN_SZ, %o0
- call do_sigsuspend
- add %o7, 1f-.-4, %o7
- nop
- sys_rt_sigsuspend: /* NOTE: %o0,%o1 have a correct value already */
- add %sp, STACK_BIAS + REGWIN_SZ, %o2
- call do_rt_sigsuspend
- add %o7, 1f-.-4, %o7
- nop
- sys32_rt_sigsuspend: /* NOTE: %o0,%o1 have a correct value already */
- srl %o0, 0, %o0
- add %sp, STACK_BIAS + REGWIN_SZ, %o2
- call do_rt_sigsuspend32
- add %o7, 1f-.-4, %o7
- /* NOTE: %o0 has a correct value already */
- sys_sigpause: add %sp, STACK_BIAS + REGWIN_SZ, %o1
- call do_sigpause
- add %o7, 1f-.-4, %o7
- nop
- sys32_sigreturn:
- add %sp, STACK_BIAS + REGWIN_SZ, %o0
- call do_sigreturn32
- add %o7, 1f-.-4, %o7
- nop
- sys_rt_sigreturn:
- add %sp, STACK_BIAS + REGWIN_SZ, %o0
- call do_rt_sigreturn
- add %o7, 1f-.-4, %o7
- nop
- sys32_rt_sigreturn:
- add %sp, STACK_BIAS + REGWIN_SZ, %o0
- call do_rt_sigreturn32
- add %o7, 1f-.-4, %o7
- nop
- sys_ptrace: add %sp, STACK_BIAS + REGWIN_SZ, %o0
- call do_ptrace
- add %o7, 1f-.-4, %o7
- nop
- .align 32
- 1: ldx [%curptr + AOFF_task_ptrace], %l5
- andcc %l5, 0x02, %g0
- be,pt %icc, rtrap
- clr %l6
- call syscall_trace
- nop
- 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, do_fork
- add %sp, STACK_BIAS + REGWIN_SZ, %o2
- ret_from_syscall:
- /* Clear SPARC_FLAG_NEWCHILD, switch_to leaves thread.flags in
- * %o7 for us. Check performance counter stuff too.
- */
- andn %o7, SPARC_FLAG_NEWCHILD, %l0
- mov %g5, %o0 /* 'prev' */
- call schedule_tail
- stb %l0, [%g6 + AOFF_task_thread + AOFF_thread_flags]
- andcc %l0, SPARC_FLAG_PERFCTR, %g0
- be,pt %icc, 1f
- nop
- ldx [%g6 + AOFF_task_thread + AOFF_thread_pcr_reg], %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 + STACK_BIAS + REGWIN_SZ + 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 + AOFF_task_thread + AOFF_thread_w_saved]
- linux_sparc_ni_syscall:
- sethi %hi(sys_ni_syscall), %l7
- b,pt %xcc, 4f
- or %l7, %lo(sys_ni_syscall), %l7
- linux_syscall_trace32:
- call syscall_trace
- nop
- srl %i0, 0, %o0
- mov %i4, %o4
- srl %i1, 0, %o1
- srl %i2, 0, %o2
- b,pt %xcc, 2f
- srl %i3, 0, %o3
- linux_syscall_trace:
- call syscall_trace
- nop
- 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
- #ifdef SYSCALL_TRACING
- call syscall_trace_entry
- add %sp, STACK_BIAS + REGWIN_SZ, %o0
- srl %i0, 0, %o0
- #endif
- mov %i4, %o4 ! IEU1
- lduw [%l7 + %l4], %l7 ! Load
- srl %i1, 0, %o1 ! IEU0 Group
- ldx [%curptr + AOFF_task_ptrace], %l0 ! Load
- mov %i5, %o5 ! IEU1
- srl %i2, 0, %o2 ! IEU0 Group
- andcc %l0, 0x02, %g0 ! IEU0 Group
- 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
- #ifdef SYSCALL_TRACING
- call syscall_trace_entry
- add %sp, STACK_BIAS + REGWIN_SZ, %o0
- mov %i0, %o0
- #endif
- mov %i1, %o1 ! IEU1
- lduw [%l7 + %l4], %l7 ! Load
- 4: mov %i2, %o2 ! IEU0 Group
- ldx [%curptr + AOFF_task_ptrace], %l0 ! Load
- mov %i3, %o3 ! IEU1
- mov %i4, %o4 ! IEU0 Group
- andcc %l0, 0x02, %g0 ! IEU1 Group+1 bubble
- 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 + STACK_BIAS + REGWIN_SZ + PT_V9_I0]
- ret_sys_call:
- #ifdef SYSCALL_TRACING
- mov %o0, %o1
- call syscall_trace_exit
- add %sp, STACK_BIAS + REGWIN_SZ, %o0
- mov %o1, %o0
- #endif
- ldx [%sp + STACK_BIAS + REGWIN_SZ + PT_V9_TSTATE], %g3
- ldx [%sp + STACK_BIAS + REGWIN_SZ + PT_V9_TNPC], %l1 ! pc = npc
- sra %o0, 0, %o0
- mov %ulo(TSTATE_XCARRY | TSTATE_ICARRY), %g2
- cmp %o0, -ENOIOCTLCMD
- sllx %g2, 32, %g2
- bgeu,pn %xcc, 1f
- andcc %l0, 0x02, %l6
- andn %g3, %g2, %g3 /* System call success, clear Carry condition code. */
- stx %g3, [%sp + STACK_BIAS + REGWIN_SZ + PT_V9_TSTATE]
- bne,pn %icc, linux_syscall_trace2
- add %l1, 0x4, %l2 ! npc = npc+4
- stx %l1, [%sp + STACK_BIAS + REGWIN_SZ + PT_V9_TPC]
- ba,pt %xcc, rtrap_clr_l6
- stx %l2, [%sp + STACK_BIAS + REGWIN_SZ + PT_V9_TNPC]
- 1:
- /* System call failure, set Carry condition code.
- * Also, get abs(errno) to return to the process.
- */
- sub %g0, %o0, %o0
- or %g3, %g2, %g3
- stx %o0, [%sp + STACK_BIAS + REGWIN_SZ + PT_V9_I0]
- mov 1, %l6
- stx %g3, [%sp + STACK_BIAS + REGWIN_SZ + PT_V9_TSTATE]
- bne,pn %icc, linux_syscall_trace2
- add %l1, 0x4, %l2 !npc = npc+4
- stx %l1, [%sp + STACK_BIAS + REGWIN_SZ + PT_V9_TPC]
- b,pt %xcc, rtrap
- stx %l2, [%sp + STACK_BIAS + REGWIN_SZ + PT_V9_TNPC]
- linux_syscall_trace2:
- call syscall_trace
- nop
- stx %l1, [%sp + STACK_BIAS + REGWIN_SZ + PT_V9_TPC]
- ba,pt %xcc, rtrap
- stx %l2, [%sp + STACK_BIAS + REGWIN_SZ + 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
- /* This need not obtain the xtime_lock as it is coded in
- * an implicitly SMP safe way already.
- */
- .align 64
- .globl do_gettimeofday
- do_gettimeofday: /* %o0 = timevalp */
- /* Load doubles must be used on xtime so that what we get
- * is guarenteed to be atomic, this is why we can run this
- * with interrupts on full blast. Don't touch this... -DaveM
- *
- * Note with time_t changes to the timeval type, I must now use
- * nucleus atomic quad 128-bit loads.
- *
- * If xtime was stored recently, I've seen crap from the
- * quad load on Cheetah. Putting a membar SYNC before
- * the quad load seems to make the problem go away. -DaveM
- * (we should nop out workarounds like this on spitfire)
- */
- sethi %hi(timer_tick_offset), %g3
- sethi %hi(xtime), %g2
- sethi %hi(timer_tick_compare), %g1
- ldx [%g3 + %lo(timer_tick_offset)], %g3
- or %g2, %lo(xtime), %g2
- or %g1, %lo(timer_tick_compare), %g1
- 1: membar #Sync
- ldda [%g2] ASI_NUCLEUS_QUAD_LDD, %o4
- BRANCH_IF_ANY_CHEETAH(o2,o1,2f)
- ba,pt %xcc, 3f
- rd %tick, %o1
- 2: ba,pt %xcc, 3f
- rd %asr24, %o1
- 3: ldx [%g1], %g7
- membar #Sync
- ldda [%g2] ASI_NUCLEUS_QUAD_LDD, %o2
- xor %o4, %o2, %o2
- xor %o5, %o3, %o3
- orcc %o2, %o3, %g0
- bne,pn %xcc, 1b
- sethi %hi(wall_jiffies), %o2
- sethi %hi(jiffies), %o3
- ldx [%o2 + %lo(wall_jiffies)], %o2
- ldx [%o3 + %lo(jiffies)], %o3
- sub %o3, %o2, %o2
- sethi %hi(timer_ticks_per_usec_quotient), %o3
- add %g3, %o1, %o1
- ldx [%o3 + %lo(timer_ticks_per_usec_quotient)], %o3
- sub %o1, %g7, %o1
- mulx %o3, %o1, %o1
- brz,pt %o2, 1f
- srlx %o1, 32, %o1
- sethi %hi(10000), %g2
- or %g2, %lo(10000), %g2
- add %o1, %g2, %o1
- 1: sethi %hi(1000000), %o2
- srlx %o5, 32, %o5
- or %o2, %lo(1000000), %o2
- add %o5, %o1, %o5
- cmp %o5, %o2
- bl,a,pn %xcc, 1f
- stx %o4, [%o0 + 0x0]
- add %o4, 0x1, %o4
- sub %o5, %o2, %o5
- stx %o4, [%o0 + 0x0]
- 1: retl
- st %o5, [%o0 + 0x8]