| /* $Id: entry.S,v 1.144 2002/02/09 19:49:30 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/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> |
| #include <asm/auxio.h> |
| #include <asm/sfafsr.h> |
| #include <asm/pil.h> |
| |
| #define curptr g6 |
| |
| #define NR_SYSCALLS 300 /* Each OS is different... */ |
| |
| .text |
| .align 32 |
| |
| /* This is trivial with the new code... */ |
| .globl do_fpdis |
| do_fpdis: |
| sethi %hi(TSTATE_PEF), %g4 |
| 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: TRAP_LOAD_THREAD_REG(%g6, %g1) |
| ldub [%g6 + TI_FPSAVED], %g5 |
| wr %g0, FPRS_FEF, %fprs |
| andcc %g5, FPRS_FEF, %g0 |
| be,a,pt %icc, 1f |
| clr %g7 |
| ldx [%g6 + TI_GSR], %g7 |
| 1: andcc %g5, FPRS_DL, %g0 |
| bne,pn %icc, 2f |
| fzero %f0 |
| andcc %g5, FPRS_DU, %g0 |
| bne,pn %icc, 1f |
| fzero %f2 |
| 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, TI_FPREGS + 0x80, %g1 |
| faddd %f0, %f2, %f4 |
| fmuld %f0, %f2, %f6 |
| |
| 661: ldxa [%g3] ASI_DMMU, %g5 |
| .section .sun4v_1insn_patch, "ax" |
| .word 661b |
| ldxa [%g3] ASI_MMU, %g5 |
| .previous |
| |
| sethi %hi(sparc64_kern_sec_context), %g2 |
| ldx [%g2 + %lo(sparc64_kern_sec_context)], %g2 |
| |
| 661: stxa %g2, [%g3] ASI_DMMU |
| .section .sun4v_1insn_patch, "ax" |
| .word 661b |
| stxa %g2, [%g3] ASI_MMU |
| .previous |
| |
| membar #Sync |
| add %g6, TI_FPREGS + 0xc0, %g2 |
| faddd %f0, %f2, %f8 |
| fmuld %f0, %f2, %f10 |
| membar #Sync |
| ldda [%g1] ASI_BLK_S, %f32 |
| ldda [%g2] ASI_BLK_S, %f48 |
| membar #Sync |
| 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 |
| nop |
| 2: andcc %g5, FPRS_DU, %g0 |
| bne,pt %icc, 3f |
| fzero %f32 |
| mov SECONDARY_CONTEXT, %g3 |
| fzero %f34 |
| |
| 661: ldxa [%g3] ASI_DMMU, %g5 |
| .section .sun4v_1insn_patch, "ax" |
| .word 661b |
| ldxa [%g3] ASI_MMU, %g5 |
| .previous |
| |
| add %g6, TI_FPREGS, %g1 |
| sethi %hi(sparc64_kern_sec_context), %g2 |
| ldx [%g2 + %lo(sparc64_kern_sec_context)], %g2 |
| |
| 661: stxa %g2, [%g3] ASI_DMMU |
| .section .sun4v_1insn_patch, "ax" |
| .word 661b |
| stxa %g2, [%g3] ASI_MMU |
| .previous |
| |
| membar #Sync |
| add %g6, TI_FPREGS + 0x40, %g2 |
| faddd %f32, %f34, %f36 |
| fmuld %f32, %f34, %f38 |
| membar #Sync |
| ldda [%g1] ASI_BLK_S, %f0 |
| ldda [%g2] ASI_BLK_S, %f16 |
| membar #Sync |
| 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 |
| nop |
| 3: mov SECONDARY_CONTEXT, %g3 |
| add %g6, TI_FPREGS, %g1 |
| |
| 661: ldxa [%g3] ASI_DMMU, %g5 |
| .section .sun4v_1insn_patch, "ax" |
| .word 661b |
| ldxa [%g3] ASI_MMU, %g5 |
| .previous |
| |
| sethi %hi(sparc64_kern_sec_context), %g2 |
| ldx [%g2 + %lo(sparc64_kern_sec_context)], %g2 |
| |
| 661: stxa %g2, [%g3] ASI_DMMU |
| .section .sun4v_1insn_patch, "ax" |
| .word 661b |
| stxa %g2, [%g3] ASI_MMU |
| .previous |
| |
| membar #Sync |
| mov 0x40, %g2 |
| membar #Sync |
| ldda [%g1] ASI_BLK_S, %f0 |
| 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: |
| |
| 661: stxa %g5, [%g3] ASI_DMMU |
| .section .sun4v_1insn_patch, "ax" |
| .word 661b |
| stxa %g5, [%g3] ASI_MMU |
| .previous |
| |
| membar #Sync |
| fpdis_exit2: |
| wr %g7, 0, %gsr |
| ldx [%g6 + TI_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, PTREGS_OFF, %o0 |
| ba,pt %xcc, rtrap |
| clr %l6 |
| |
| .globl do_fpother_check_fitos |
| .align 32 |
| do_fpother_check_fitos: |
| TRAP_LOAD_THREAD_REG(%g6, %g1) |
| 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 + TI_XFSR] |
| rdpr %tstate, %g3 |
| andcc %g3, TSTATE_PRIV, %g0 |
| bne,pn %xcc, do_fptrap_after_fsr |
| nop |
| ldx [%g6 + TI_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 + TI_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 + TI_FPREGS + (62 * 4)], %f62 |
| done |
| |
| .globl do_fptrap |
| .align 32 |
| do_fptrap: |
| TRAP_LOAD_THREAD_REG(%g6, %g1) |
| 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 |
| |
| 661: ldxa [%g3] ASI_DMMU, %g5 |
| .section .sun4v_1insn_patch, "ax" |
| .word 661b |
| ldxa [%g3] ASI_MMU, %g5 |
| .previous |
| |
| sethi %hi(sparc64_kern_sec_context), %g2 |
| ldx [%g2 + %lo(sparc64_kern_sec_context)], %g2 |
| |
| 661: stxa %g2, [%g3] ASI_DMMU |
| .section .sun4v_1insn_patch, "ax" |
| .word 661b |
| stxa %g2, [%g3] ASI_MMU |
| .previous |
| |
| 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 |
| |
| 661: stxa %g5, [%g1] ASI_DMMU |
| .section .sun4v_1insn_patch, "ax" |
| .word 661b |
| stxa %g5, [%g1] ASI_MMU |
| .previous |
| |
| 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 %g1 |
| * DATA 2: Address Argument 2, place in %g7 |
| * |
| * With this method we can do most of the cross-call tlb/cache |
| * flushing very quickly. |
| */ |
| .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, 3, %g3 |
| or %g2, %lo(ivector_table), %g2 |
| add %g2, %g3, %g3 |
| |
| TRAP_LOAD_IRQ_WORK(%g6, %g1) |
| |
| lduw [%g6], %g5 /* g5 = irq_work(cpu) */ |
| stw %g5, [%g3 + 0x00] /* bucket->irq_chain = g5 */ |
| stw %g3, [%g6] /* irq_work(cpu) = bucket */ |
| wr %g0, 1 << PIL_DEVICE_IRQ, %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 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_trap |
| utrap_trap: /* %g3=handler,%g4=level */ |
| TRAP_LOAD_THREAD_REG(%g6, %g1) |
| ldx [%g6 + TI_UTRAPS], %g1 |
| brnz,pt %g1, invoke_utrap |
| nop |
| |
| ba,pt %xcc, etrap |
| rd %pc, %g7 |
| mov %l4, %o1 |
| call bad_trap |
| add %sp, PTREGS_OFF, %o0 |
| ba,pt %xcc, rtrap |
| clr %l6 |
| |
| invoke_utrap: |
| sllx %g3, 3, %g3 |
| ldx [%g1 + %g3], %g1 |
| 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 |
| |
| /* We need to carefully read the error status, ACK |
| * the errors, prevent recursive traps, and pass the |
| * information on to C code for logging. |
| * |
| * We pass the AFAR in as-is, and we encode the status |
| * information as described in asm-sparc64/sfafsr.h |
| */ |
| .globl __spitfire_access_error |
| __spitfire_access_error: |
| /* Disable ESTATE error reporting so that we do not |
| * take recursive traps and RED state the processor. |
| */ |
| stxa %g0, [%g0] ASI_ESTATE_ERROR_EN |
| membar #Sync |
| |
| mov UDBE_UE, %g1 |
| ldxa [%g0] ASI_AFSR, %g4 ! Get AFSR |
| |
| /* __spitfire_cee_trap branches here with AFSR in %g4 and |
| * UDBE_CE in %g1. It only clears ESTATE_ERR_CE in the |
| * ESTATE Error Enable register. |
| */ |
| __spitfire_cee_trap_continue: |
| ldxa [%g0] ASI_AFAR, %g5 ! Get AFAR |
| |
| rdpr %tt, %g3 |
| and %g3, 0x1ff, %g3 ! Paranoia |
| sllx %g3, SFSTAT_TRAP_TYPE_SHIFT, %g3 |
| or %g4, %g3, %g4 |
| rdpr %tl, %g3 |
| cmp %g3, 1 |
| mov 1, %g3 |
| bleu %xcc, 1f |
| sllx %g3, SFSTAT_TL_GT_ONE_SHIFT, %g3 |
| |
| or %g4, %g3, %g4 |
| |
| /* Read in the UDB error register state, clearing the |
| * sticky error bits as-needed. We only clear them if |
| * the UE bit is set. Likewise, __spitfire_cee_trap |
| * below will only do so if the CE bit is set. |
| * |
| * 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. |
| */ |
| 1: ldxa [%g0] ASI_UDBH_ERROR_R, %g3 |
| and %g3, 0x3ff, %g7 ! Paranoia |
| sllx %g7, SFSTAT_UDBH_SHIFT, %g7 |
| or %g4, %g7, %g4 |
| andcc %g3, %g1, %g3 ! UDBE_UE or UDBE_CE |
| be,pn %xcc, 1f |
| nop |
| stxa %g3, [%g0] ASI_UDB_ERROR_W |
| membar #Sync |
| |
| 1: mov 0x18, %g3 |
| ldxa [%g3] ASI_UDBL_ERROR_R, %g3 |
| and %g3, 0x3ff, %g7 ! Paranoia |
| sllx %g7, SFSTAT_UDBL_SHIFT, %g7 |
| or %g4, %g7, %g4 |
| andcc %g3, %g1, %g3 ! UDBE_UE or UDBE_CE |
| be,pn %xcc, 1f |
| nop |
| mov 0x18, %g7 |
| stxa %g3, [%g7] ASI_UDB_ERROR_W |
| membar #Sync |
| |
| 1: /* Ok, now that we've latched the error state, |
| * clear the sticky bits in the AFSR. |
| */ |
| stxa %g4, [%g0] ASI_AFSR |
| membar #Sync |
| |
| rdpr %tl, %g2 |
| cmp %g2, 1 |
| rdpr %pil, %g2 |
| bleu,pt %xcc, 1f |
| wrpr %g0, 15, %pil |
| |
| ba,pt %xcc, etraptl1 |
| rd %pc, %g7 |
| |
| ba,pt %xcc, 2f |
| nop |
| |
| 1: ba,pt %xcc, etrap_irq |
| rd %pc, %g7 |
| |
| 2: mov %l4, %o1 |
| mov %l5, %o2 |
| call spitfire_access_error |
| 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. |
| * |
| * This is just like __spiftire_access_error above, but it |
| * specifically handles correctable errors. If an |
| * uncorrectable error is indicated in the AFSR we |
| * will branch directly above to __spitfire_access_error |
| * to handle it instead. Uncorrectable therefore takes |
| * priority over correctable, and the error logging |
| * C code will notice this case by inspecting the |
| * trap type. |
| */ |
| .globl __spitfire_cee_trap |
| __spitfire_cee_trap: |
| ldxa [%g0] ASI_AFSR, %g4 ! Get AFSR |
| mov 1, %g3 |
| sllx %g3, SFAFSR_UE_SHIFT, %g3 |
| andcc %g4, %g3, %g0 ! Check for UE |
| bne,pn %xcc, __spitfire_access_error |
| nop |
| |
| /* Ok, in this case we only have a correctable error. |
| * Indicate we only wish to capture that state in register |
| * %g1, and we only disable CE error reporting unlike UE |
| * handling which disables all errors. |
| */ |
| ldxa [%g0] ASI_ESTATE_ERROR_EN, %g3 |
| andn %g3, ESTATE_ERR_CE, %g3 |
| stxa %g3, [%g0] ASI_ESTATE_ERROR_EN |
| membar #Sync |
| |
| /* Preserve AFSR in %g4, indicate UDB state to capture in %g1 */ |
| ba,pt %xcc, __spitfire_cee_trap_continue |
| mov UDBE_CE, %g1 |
| |
| .globl __spitfire_data_access_exception |
| .globl __spitfire_data_access_exception_tl1 |
| __spitfire_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 spitfire_data_access_exception_tl1 |
| add %sp, PTREGS_OFF, %o0 |
| ba,pt %xcc, rtrap |
| clr %l6 |
| |
| __spitfire_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 spitfire_data_access_exception |
| add %sp, PTREGS_OFF, %o0 |
| ba,pt %xcc, rtrap |
| clr %l6 |
| |
| .globl __spitfire_insn_access_exception |
| .globl __spitfire_insn_access_exception_tl1 |
| __spitfire_insn_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 spitfire_insn_access_exception_tl1 |
| add %sp, PTREGS_OFF, %o0 |
| ba,pt %xcc, rtrap |
| clr %l6 |
| |
| __spitfire_insn_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 spitfire_insn_access_exception |
| add %sp, PTREGS_OFF, %o0 |
| ba,pt %xcc, rtrap |
| clr %l6 |
| |
| /* 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: |
| rdpr %pil, %g2 |
| wrpr %g0, 15, %pil |
| ba,pt %xcc, etrap_irq |
| rd %pc, %g7 |
| mov 0x0, %o0 |
| call cheetah_plus_parity_error |
| add %sp, PTREGS_OFF, %o1 |
| ba,a,pt %xcc, rtrap_irq |
| |
| 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: |
| rdpr %pil, %g2 |
| wrpr %g0, 15, %pil |
| ba,pt %xcc, etrap_irq |
| rd %pc, %g7 |
| mov 0x1, %o0 |
| call cheetah_plus_parity_error |
| add %sp, PTREGS_OFF, %o1 |
| ba,a,pt %xcc, rtrap_irq |
| |
| 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. */ |
| sethi %hi(dcache_parity_tl1_occurred), %g2 |
| lduw [%g2 + %lo(dcache_parity_tl1_occurred)], %g1 |
| add %g1, 1, %g1 |
| stw %g1, [%g2 + %lo(dcache_parity_tl1_occurred)] |
| /* 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. */ |
| sethi %hi(icache_parity_tl1_occurred), %g2 |
| lduw [%g2 + %lo(icache_parity_tl1_occurred)], %g1 |
| add %g1, 1, %g1 |
| stw %g1, [%g2 + %lo(icache_parity_tl1_occurred)] |
| /* 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 |
| |
| /* 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: unused, will have current thread ptr after etrap |
| * %g7: scratch |
| */ |
| __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 |
| |
| /* %g1 now points to I-cache logging area */ |
| 20: 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 |
| |
| /* %g1 now points to E-cache logging area */ |
| 30: andn %g5, (32 - 1), %g2 |
| 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: |
| rdpr %tt, %g2 |
| cmp %g2, 0x70 |
| be c_fast_ecc |
| cmp %g2, 0x63 |
| be c_cee |
| nop |
| ba,pt %xcc, c_deferred |
| |
| /* 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 |
| |
| ba,pt %xcc, __cheetah_log_error |
| nop |
| |
| c_fast_ecc: |
| 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 |
| |
| ba,pt %xcc, __cheetah_log_error |
| nop |
| |
| c_cee: |
| 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 |
| |
| ba,pt %xcc, __cheetah_log_error |
| nop |
| |
| c_deferred: |
| 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_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 |
| #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: rdpr %pstate, %g2 |
| wrpr %g2, PSTATE_IE, %pstate |
| rdpr %otherwin, %g1 |
| rdpr %cansave, %g3 |
| add %g3, %g1, %g3 |
| wrpr %g3, 0x0, %cansave |
| wrpr %g0, 0x0, %otherwin |
| wrpr %g2, 0x0, %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], %l2 |
| brnz,a,pn %l2, 80f |
| stb %g0, [%curptr + TI_SYS_NOERROR] |
| |
| 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 |
| |
| #ifdef CONFIG_SMP |
| .globl hard_smp_processor_id |
| hard_smp_processor_id: |
| #endif |
| .globl real_hard_smp_processor_id |
| real_hard_smp_processor_id: |
| __GET_CPUID(%o0) |
| retl |
| nop |
| |
| /* %o0: devhandle |
| * %o1: devino |
| * |
| * returns %o0: sysino |
| */ |
| .globl sun4v_devino_to_sysino |
| sun4v_devino_to_sysino: |
| mov HV_FAST_INTR_DEVINO2SYSINO, %o5 |
| ta HV_FAST_TRAP |
| retl |
| mov %o1, %o0 |
| |
| /* %o0: sysino |
| * |
| * returns %o0: intr_enabled (HV_INTR_{DISABLED,ENABLED}) |
| */ |
| .globl sun4v_intr_getenabled |
| sun4v_intr_getenabled: |
| mov HV_FAST_INTR_GETENABLED, %o5 |
| ta HV_FAST_TRAP |
| retl |
| mov %o1, %o0 |
| |
| /* %o0: sysino |
| * %o1: intr_enabled (HV_INTR_{DISABLED,ENABLED}) |
| */ |
| .globl sun4v_intr_setenabled |
| sun4v_intr_setenabled: |
| mov HV_FAST_INTR_SETENABLED, %o5 |
| ta HV_FAST_TRAP |
| retl |
| nop |
| |
| /* %o0: sysino |
| * |
| * returns %o0: intr_state (HV_INTR_STATE_*) |
| */ |
| .globl sun4v_intr_getstate |
| sun4v_intr_getstate: |
| mov HV_FAST_INTR_GETSTATE, %o5 |
| ta HV_FAST_TRAP |
| retl |
| mov %o1, %o0 |
| |
| /* %o0: sysino |
| * %o1: intr_state (HV_INTR_STATE_*) |
| */ |
| .globl sun4v_intr_setstate |
| sun4v_intr_setstate: |
| mov HV_FAST_INTR_SETSTATE, %o5 |
| ta HV_FAST_TRAP |
| retl |
| nop |
| |
| /* %o0: sysino |
| * |
| * returns %o0: cpuid |
| */ |
| .globl sun4v_intr_gettarget |
| sun4v_intr_gettarget: |
| mov HV_FAST_INTR_GETTARGET, %o5 |
| ta HV_FAST_TRAP |
| retl |
| mov %o1, %o0 |
| |
| /* %o0: sysino |
| * %o1: cpuid |
| */ |
| .globl sun4v_intr_settarget |
| sun4v_intr_settarget: |
| mov HV_FAST_INTR_SETTARGET, %o5 |
| ta HV_FAST_TRAP |
| retl |
| nop |
| |
| /* %o0: type |
| * %o1: queue paddr |
| * %o2: num queue entries |
| * |
| * returns %o0: status |
| */ |
| .globl sun4v_cpu_qconf |
| sun4v_cpu_qconf: |
| mov HV_FAST_CPU_QCONF, %o5 |
| ta HV_FAST_TRAP |
| retl |
| nop |
| |
| /* returns %o0: status |
| */ |
| .globl sun4v_cpu_yield |
| sun4v_cpu_yield: |
| mov HV_FAST_CPU_YIELD, %o5 |
| ta HV_FAST_TRAP |
| retl |
| nop |
| |
| /* %o0: num cpus in cpu list |
| * %o1: cpu list paddr |
| * %o2: mondo block paddr |
| * |
| * returns %o0: status |
| */ |
| .globl sun4v_cpu_mondo_send |
| sun4v_cpu_mondo_send: |
| mov HV_FAST_CPU_MONDO_SEND, %o5 |
| ta HV_FAST_TRAP |
| retl |
| nop |
| |
| /* %o0: CPU ID |
| * |
| * returns %o0: -status if status non-zero, else |
| * %o0: cpu state as HV_CPU_STATE_* |
| */ |
| .globl sun4v_cpu_state |
| sun4v_cpu_state: |
| mov HV_FAST_CPU_STATE, %o5 |
| ta HV_FAST_TRAP |
| brnz,pn %o0, 1f |
| sub %g0, %o0, %o0 |
| mov %o1, %o0 |
| 1: retl |
| nop |
