/* $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 #include #include #include #include #include #include #include #include #include #include #include #include #define curptr g6 #define NR_SYSCALLS 284 /* 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: /* Load 0xf0000000, which is LOW_OBP_ADDRESS. */ mov 0xf, %g5 sllx %g5, 28, %g5 /* Is addr >= LOW_OBP_ADDRESS? */ cmp %g4, %g5 blu,pn %xcc, sparc64_vpte_patchme1 mov 0x1, %g5 /* Load 0x100000000, which is HI_OBP_ADDRESS. */ sllx %g5, 32, %g5 /* Is addr < HI_OBP_ADDRESS? */ cmp %g4, %g5 blu,pn %xcc, obp_iaddr_patch nop /* These two instructions are patched by paginig_init(). */ sparc64_vpte_patchme1: sethi %hi(0), %g5 sparc64_vpte_patchme2: or %g5, %lo(0), %g5 /* With kernel PGD in %g5, branch back into dtlb_backend. */ ba,pt %xcc, sparc64_kpte_continue andn %g1, 0x3, %g1 /* Finish PMD offset adjustment. */ vpte_noent: /* Restore previous TAG_ACCESS, %g5 is zero, and we will * skip over the trap instruction so that the top level * TLB miss handler will thing this %g5 value is just an * invalid PTE, thus branching to full fault processing. */ mov TLB_SFSR, %g1 stxa %g4, [%g1 + %g1] ASI_DMMU done .globl obp_iaddr_patch obp_iaddr_patch: /* These two instructions patched by inherit_prom_mappings(). */ sethi %hi(0), %g5 or %g5, %lo(0), %g5 /* Behave as if we are at TL0. */ wrpr %g0, 1, %tl rdpr %tpc, %g4 /* Find original faulting iaddr */ srlx %g4, 13, %g4 /* Throw out context bits */ sllx %g4, 13, %g4 /* g4 has vpn + ctx0 now */ /* Restore previous TAG_ACCESS. */ mov TLB_SFSR, %g1 stxa %g4, [%g1 + %g1] ASI_IMMU /* Get PMD offset. */ srlx %g4, 23, %g6 and %g6, 0x7ff, %g6 sllx %g6, 2, %g6 /* Load PMD, is it valid? */ lduwa [%g5 + %g6] ASI_PHYS_USE_EC, %g5 brz,pn %g5, longpath sllx %g5, 11, %g5 /* Get PTE offset. */ srlx %g4, 13, %g6 and %g6, 0x3ff, %g6 sllx %g6, 3, %g6 /* Load PTE. */ ldxa [%g5 + %g6] ASI_PHYS_USE_EC, %g5 brgez,pn %g5, longpath nop /* TLB load and return from trap. */ stxa %g5, [%g0] ASI_ITLB_DATA_IN retry .globl obp_daddr_patch obp_daddr_patch: /* These two instructions patched by inherit_prom_mappings(). */ sethi %hi(0), %g5 or %g5, %lo(0), %g5 /* Get PMD offset. */ srlx %g4, 23, %g6 and %g6, 0x7ff, %g6 sllx %g6, 2, %g6 /* Load PMD, is it valid? */ lduwa [%g5 + %g6] ASI_PHYS_USE_EC, %g5 brz,pn %g5, longpath sllx %g5, 11, %g5 /* Get PTE offset. */ srlx %g4, 13, %g6 and %g6, 0x3ff, %g6 sllx %g6, 3, %g6 /* Load PTE. */ ldxa [%g5 + %g6] ASI_PHYS_USE_EC, %g5 brgez,pn %g5, longpath nop /* TLB load and return from trap. */ stxa %g5, [%g0] ASI_DTLB_DATA_IN 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: /* Load 0xf0000000, which is LOW_OBP_ADDRESS. */ mov 0xf, %g5 sllx %g5, 28, %g5 /* Is addr >= LOW_OBP_ADDRESS? */ cmp %g4, %g5 blu,pn %xcc, vmalloc_addr mov 0x1, %g5 /* Load 0x100000000, which is HI_OBP_ADDRESS. */ sllx %g5, 32, %g5 /* Is addr < HI_OBP_ADDRESS? */ cmp %g4, %g5 blu,pn %xcc, obp_daddr_patch nop vmalloc_addr: /* If we get here, a vmalloc addr accessed, load kernel VPTE. */ ldxa [%g3 + %g6] ASI_N, %g5 brgez,pn %g5, longpath nop /* PTE is valid, load into TLB and return from trap. */ 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 + TI_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 + TI_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, TI_FPREGS + 0x80, %g1 faddd %f0, %f2, %f4 fmuld %f0, %f2, %f6 ldxa [%g3] ASI_DMMU, %g5 cplus_fptrap_insn_1: sethi %hi(0), %g2 stxa %g2, [%g3] ASI_DMMU membar #Sync add %g6, TI_FPREGS + 0xc0, %g2 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 membar #Sync b,pt %xcc, fpdis_exit nop 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, TI_FPREGS, %g1 cplus_fptrap_insn_2: sethi %hi(0), %g2 stxa %g2, [%g3] ASI_DMMU membar #Sync add %g6, TI_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 membar #Sync ba,pt %xcc, fpdis_exit nop 3: mov SECONDARY_CONTEXT, %g3 add %g6, TI_FPREGS, %g1 ldxa [%g3] ASI_DMMU, %g5 cplus_fptrap_insn_3: sethi %hi(0), %g2 stxa %g2, [%g3] ASI_DMMU membar #Sync mov 0x40, %g2 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 + 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: 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: stx %fsr, [%g6 + TI_XFSR] do_fptrap_after_fsr: ldub [%g6 + TI_FPSAVED], %g3 rd %fprs, %g1 or %g3, %g1, %g3 stb %g3, [%g6 + TI_FPSAVED] rd %gsr, %g3 stx %g3, [%g6 + TI_GSR] mov SECONDARY_CONTEXT, %g3 ldxa [%g3] ASI_DMMU, %g5 cplus_fptrap_insn_4: sethi %hi(0), %g2 stxa %g2, [%g3] ASI_DMMU membar #Sync add %g6, TI_FPREGS, %g2 andcc %g1, FPRS_DL, %g0 be,pn %icc, 4f mov 0x40, %g3 stda %f0, [%g2] ASI_BLK_S stda %f16, [%g2 + %g3] ASI_BLK_S andcc %g1, FPRS_DU, %g0 be,pn %icc, 5f 4: add %g2, 128, %g2 stda %f32, [%g2] ASI_BLK_S stda %f48, [%g2 + %g3] ASI_BLK_S 5: mov SECONDARY_CONTEXT, %g1 membar #Sync stxa %g5, [%g1] ASI_DMMU membar #Sync ba,pt %xcc, etrap wr %g0, 0, %fprs cplus_fptrap_1: sethi %hi(CTX_CHEETAH_PLUS_CTX0), %g2 .globl cheetah_plus_patch_fpdis cheetah_plus_patch_fpdis: /* We configure the dTLB512_0 for 4MB pages and the * dTLB512_1 for 8K pages when in context zero. */ sethi %hi(cplus_fptrap_1), %o0 lduw [%o0 + %lo(cplus_fptrap_1)], %o1 set cplus_fptrap_insn_1, %o2 stw %o1, [%o2] flush %o2 set cplus_fptrap_insn_2, %o2 stw %o1, [%o2] flush %o2 set cplus_fptrap_insn_3, %o2 stw %o1, [%o2] flush %o2 set cplus_fptrap_insn_4, %o2 stw %o1, [%o2] flush %o2 retl nop /* The registers for cross calls will be: * * DATA 0: [low 32-bits] Address of function to call, jmp to this * [high 32-bits] MMU Context Argument 0, place in %g5 * DATA 1: Address Argument 1, place in %g6 * DATA 2: Address Argument 2, place in %g7 * * With this method we can do most of the cross-call tlb/cache * flushing very quickly. * * Current CPU's IRQ worklist table is locked into %g1, * don't touch. */ .text .align 32 .globl do_ivec do_ivec: mov 0x40, %g3 ldxa [%g3 + %g0] ASI_INTR_R, %g3 sethi %hi(KERNBASE), %g4 cmp %g3, %g4 bgeu,pn %xcc, do_ivec_xcall srlx %g3, 32, %g5 stxa %g0, [%g0] ASI_INTR_RECEIVE membar #Sync sethi %hi(ivector_table), %g2 sllx %g3, 5, %g3 or %g2, %lo(ivector_table), %g2 add %g2, %g3, %g3 ldub [%g3 + 0x04], %g4 /* pil */ mov 1, %g2 sllx %g2, %g4, %g2 sllx %g4, 2, %g4 lduw [%g6 + %g4], %g5 /* g5 = irq_work(cpu, pil) */ stw %g5, [%g3 + 0x00] /* bucket->irq_chain = g5 */ stw %g3, [%g6 + %g4] /* irq_work(cpu, pil) = bucket */ wr %g2, 0x0, %set_softint retry do_ivec_xcall: mov 0x50, %g1 ldxa [%g1 + %g0] ASI_INTR_R, %g1 srl %g3, 0, %g3 mov 0x60, %g7 ldxa [%g7 + %g0] ASI_INTR_R, %g7 stxa %g0, [%g0] ASI_INTR_RECEIVE membar #Sync ba,pt %xcc, 1f nop .align 32 1: jmpl %g3, %g0 nop .globl save_alternate_globals save_alternate_globals: /* %o0 = save_area */ rdpr %pstate, %o5 andn %o5, PSTATE_IE, %o1 wrpr %o1, PSTATE_AG, %pstate stx %g0, [%o0 + 0x00] stx %g1, [%o0 + 0x08] stx %g2, [%o0 + 0x10] stx %g3, [%o0 + 0x18] stx %g4, [%o0 + 0x20] stx %g5, [%o0 + 0x28] stx %g6, [%o0 + 0x30] stx %g7, [%o0 + 0x38] wrpr %o1, PSTATE_IG, %pstate stx %g0, [%o0 + 0x40] stx %g1, [%o0 + 0x48] stx %g2, [%o0 + 0x50] stx %g3, [%o0 + 0x58] stx %g4, [%o0 + 0x60] stx %g5, [%o0 + 0x68] stx %g6, [%o0 + 0x70] stx %g7, [%o0 + 0x78] wrpr %o1, PSTATE_MG, %pstate stx %g0, [%o0 + 0x80] stx %g1, [%o0 + 0x88] stx %g2, [%o0 + 0x90] stx %g3, [%o0 + 0x98] stx %g4, [%o0 + 0xa0] stx %g5, [%o0 + 0xa8] stx %g6, [%o0 + 0xb0] stx %g7, [%o0 + 0xb8] wrpr %o5, 0x0, %pstate retl nop .globl restore_alternate_globals restore_alternate_globals: /* %o0 = save_area */ rdpr %pstate, %o5 andn %o5, PSTATE_IE, %o1 wrpr %o1, PSTATE_AG, %pstate ldx [%o0 + 0x00], %g0 ldx [%o0 + 0x08], %g1 ldx [%o0 + 0x10], %g2 ldx [%o0 + 0x18], %g3 ldx [%o0 + 0x20], %g4 ldx [%o0 + 0x28], %g5 ldx [%o0 + 0x30], %g6 ldx [%o0 + 0x38], %g7 wrpr %o1, PSTATE_IG, %pstate ldx [%o0 + 0x40], %g0 ldx [%o0 + 0x48], %g1 ldx [%o0 + 0x50], %g2 ldx [%o0 + 0x58], %g3 ldx [%o0 + 0x60], %g4 ldx [%o0 + 0x68], %g5 ldx [%o0 + 0x70], %g6 ldx [%o0 + 0x78], %g7 wrpr %o1, PSTATE_MG, %pstate ldx [%o0 + 0x80], %g0 ldx [%o0 + 0x88], %g1 ldx [%o0 + 0x90], %g2 ldx [%o0 + 0x98], %g3 ldx [%o0 + 0xa0], %g4 ldx [%o0 + 0xa8], %g5 ldx [%o0 + 0xb0], %g6 ldx [%o0 + 0xb8], %g7 wrpr %o5, 0x0, %pstate retl nop .globl getcc, setcc getcc: ldx [%o0 + PT_V9_TSTATE], %o1 srlx %o1, 32, %o1 and %o1, 0xf, %o1 retl stx %o1, [%o0 + PT_V9_G1] setcc: ldx [%o0 + PT_V9_TSTATE], %o1 ldx [%o0 + PT_V9_G1], %o2 or %g0, %ulo(TSTATE_ICC), %o3 sllx %o3, 32, %o3 andn %o1, %o3, %o1 sllx %o2, 32, %o2 and %o2, %o3, %o2 or %o1, %o2, %o1 retl stx %o1, [%o0 + PT_V9_TSTATE] .globl utrap, utrap_ill utrap: brz,pn %g1, etrap nop save %sp, -128, %sp rdpr %tstate, %l6 rdpr %cwp, %l7 andn %l6, TSTATE_CWP, %l6 wrpr %l6, %l7, %tstate rdpr %tpc, %l6 rdpr %tnpc, %l7 wrpr %g1, 0, %tnpc done utrap_ill: call bad_trap add %sp, PTREGS_OFF, %o0 ba,pt %xcc, rtrap clr %l6 /* XXX Here is stuff we still need to write... -DaveM XXX */ .globl netbsd_syscall netbsd_syscall: retl nop /* 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, PTREGS_OFF, %o0 ba,pt %xcc, rtrap clr %l6 .globl __do_instruction_access_exception .globl __do_instruction_access_exception_tl1 __do_instruction_access_exception_tl1: rdpr %pstate, %g4 wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate mov TLB_SFSR, %g3 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, PTREGS_OFF, %o0 ba,pt %xcc, rtrap clr %l6 __do_instruction_access_exception: rdpr %pstate, %g4 wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate mov TLB_SFSR, %g3 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, PTREGS_OFF, %o0 ba,pt %xcc, rtrap clr %l6 /* This is the trap handler entry point for ECC correctable * errors. They are corrected, but we listen for the trap * so that the event can be logged. * * Disrupting errors are either: * 1) single-bit ECC errors during UDB reads to system * memory * 2) data parity errors during write-back events * * As far as I can make out from the manual, the CEE trap * is only for correctable errors during memory read * accesses by the front-end of the processor. * * The code below is only for trap level 1 CEE events, * as it is the only situation where we can safely record * and log. For trap level >1 we just clear the CE bit * in the AFSR and return. */ /* Our trap handling infrastructure allows us to preserve * two 64-bit values during etrap for arguments to * subsequent C code. Therefore we encode the information * as follows: * * value 1) Full 64-bits of AFAR * value 2) Low 33-bits of AFSR, then bits 33-->42 * are UDBL error status and bits 43-->52 * are UDBH error status */ .align 64 .globl cee_trap cee_trap: ldxa [%g0] ASI_AFSR, %g1 ! Read AFSR ldxa [%g0] ASI_AFAR, %g2 ! Read AFAR sllx %g1, 31, %g1 ! Clear reserved bits srlx %g1, 31, %g1 ! in AFSR /* NOTE: UltraSparc-I/II have high and low UDB error * registers, corresponding to the two UDB units * present on those chips. UltraSparc-IIi only * has a single UDB, called "SDB" in the manual. * For IIi the upper UDB register always reads * as zero so for our purposes things will just * work with the checks below. */ ldxa [%g0] ASI_UDBL_ERROR_R, %g3 ! Read UDB-Low error status andcc %g3, (1 << 8), %g4 ! Check CE bit sllx %g3, (64 - 10), %g3 ! Clear reserved bits srlx %g3, (64 - 10), %g3 ! in UDB-Low error status sllx %g3, (33 + 0), %g3 ! Shift up to encoding area or %g1, %g3, %g1 ! Or it in be,pn %xcc, 1f ! Branch if CE bit was clear nop stxa %g4, [%g0] ASI_UDB_ERROR_W ! Clear CE sticky bit in UDBL membar #Sync ! Synchronize ASI stores 1: mov 0x18, %g5 ! Addr of UDB-High error status ldxa [%g5] ASI_UDBH_ERROR_R, %g3 ! Read it andcc %g3, (1 << 8), %g4 ! Check CE bit sllx %g3, (64 - 10), %g3 ! Clear reserved bits srlx %g3, (64 - 10), %g3 ! in UDB-High error status sllx %g3, (33 + 10), %g3 ! Shift up to encoding area or %g1, %g3, %g1 ! Or it in be,pn %xcc, 1f ! Branch if CE bit was clear nop nop stxa %g4, [%g5] ASI_UDB_ERROR_W ! Clear CE sticky bit in UDBH membar #Sync ! Synchronize ASI stores 1: mov 1, %g5 ! AFSR CE bit is sllx %g5, 20, %g5 ! bit 20 stxa %g5, [%g0] ASI_AFSR ! Clear CE sticky bit in AFSR membar #Sync ! Synchronize ASI stores sllx %g2, (64 - 41), %g2 ! Clear reserved bits srlx %g2, (64 - 41), %g2 ! in latched AFAR andn %g2, 0x0f, %g2 ! Finish resv bit clearing mov %g1, %g4 ! Move AFSR+UDB* into save reg mov %g2, %g5 ! Move AFAR into save reg rdpr %pil, %g2 wrpr %g0, 15, %pil ba,pt %xcc, etrap_irq rd %pc, %g7 mov %l4, %o0 mov %l5, %o1 call cee_log add %sp, PTREGS_OFF, %o2 ba,a,pt %xcc, rtrap_irq /* Capture I/D/E-cache state into per-cpu error scoreboard. * * %g1: (TL>=0) ? 1 : 0 * %g2: scratch * %g3: scratch * %g4: AFSR * %g5: AFAR * %g6: current thread ptr * %g7: scratch */ #define CHEETAH_LOG_ERROR \ /* Put "TL1" software bit into AFSR. */ \ and %g1, 0x1, %g1; \ sllx %g1, 63, %g2; \ or %g4, %g2, %g4; \ /* Get log entry pointer for this cpu at this trap level. */ \ BRANCH_IF_JALAPENO(g2,g3,50f) \ ldxa [%g0] ASI_SAFARI_CONFIG, %g2; \ srlx %g2, 17, %g2; \ ba,pt %xcc, 60f; \ and %g2, 0x3ff, %g2; \ 50: ldxa [%g0] ASI_JBUS_CONFIG, %g2; \ srlx %g2, 17, %g2; \ and %g2, 0x1f, %g2; \ 60: sllx %g2, 9, %g2; \ sethi %hi(cheetah_error_log), %g3; \ ldx [%g3 + %lo(cheetah_error_log)], %g3; \ brz,pn %g3, 80f; \ nop; \ add %g3, %g2, %g3; \ sllx %g1, 8, %g1; \ add %g3, %g1, %g1; \ /* %g1 holds pointer to the top of the logging scoreboard */ \ ldx [%g1 + 0x0], %g7; \ cmp %g7, -1; \ bne,pn %xcc, 80f; \ nop; \ stx %g4, [%g1 + 0x0]; \ stx %g5, [%g1 + 0x8]; \ add %g1, 0x10, %g1; \ /* %g1 now points to D-cache logging area */ \ set 0x3ff8, %g2; /* DC_addr mask */ \ and %g5, %g2, %g2; /* DC_addr bits of AFAR */ \ srlx %g5, 12, %g3; \ or %g3, 1, %g3; /* PHYS tag + valid */ \ 10: ldxa [%g2] ASI_DCACHE_TAG, %g7; \ cmp %g3, %g7; /* TAG match? */ \ bne,pt %xcc, 13f; \ nop; \ /* Yep, what we want, capture state. */ \ stx %g2, [%g1 + 0x20]; \ stx %g7, [%g1 + 0x28]; \ /* A membar Sync is required before and after utag access. */ \ membar #Sync; \ ldxa [%g2] ASI_DCACHE_UTAG, %g7; \ membar #Sync; \ stx %g7, [%g1 + 0x30]; \ ldxa [%g2] ASI_DCACHE_SNOOP_TAG, %g7; \ stx %g7, [%g1 + 0x38]; \ clr %g3; \ 12: ldxa [%g2 + %g3] ASI_DCACHE_DATA, %g7; \ stx %g7, [%g1]; \ add %g3, (1 << 5), %g3; \ cmp %g3, (4 << 5); \ bl,pt %xcc, 12b; \ add %g1, 0x8, %g1; \ ba,pt %xcc, 20f; \ add %g1, 0x20, %g1; \ 13: sethi %hi(1 << 14), %g7; \ add %g2, %g7, %g2; \ srlx %g2, 14, %g7; \ cmp %g7, 4; \ bl,pt %xcc, 10b; \ nop; \ add %g1, 0x40, %g1; \ 20: /* %g1 now points to I-cache logging area */ \ set 0x1fe0, %g2; /* IC_addr mask */ \ and %g5, %g2, %g2; /* IC_addr bits of AFAR */ \ sllx %g2, 1, %g2; /* IC_addr[13:6]==VA[12:5] */ \ srlx %g5, (13 - 8), %g3; /* Make PTAG */ \ andn %g3, 0xff, %g3; /* Mask off undefined bits */ \ 21: ldxa [%g2] ASI_IC_TAG, %g7; \ andn %g7, 0xff, %g7; \ cmp %g3, %g7; \ bne,pt %xcc, 23f; \ nop; \ /* Yep, what we want, capture state. */ \ stx %g2, [%g1 + 0x40]; \ stx %g7, [%g1 + 0x48]; \ add %g2, (1 << 3), %g2; \ ldxa [%g2] ASI_IC_TAG, %g7; \ add %g2, (1 << 3), %g2; \ stx %g7, [%g1 + 0x50]; \ ldxa [%g2] ASI_IC_TAG, %g7; \ add %g2, (1 << 3), %g2; \ stx %g7, [%g1 + 0x60]; \ ldxa [%g2] ASI_IC_TAG, %g7; \ stx %g7, [%g1 + 0x68]; \ sub %g2, (3 << 3), %g2; \ ldxa [%g2] ASI_IC_STAG, %g7; \ stx %g7, [%g1 + 0x58]; \ clr %g3; \ srlx %g2, 2, %g2; \ 22: ldxa [%g2 + %g3] ASI_IC_INSTR, %g7; \ stx %g7, [%g1]; \ add %g3, (1 << 3), %g3; \ cmp %g3, (8 << 3); \ bl,pt %xcc, 22b; \ add %g1, 0x8, %g1; \ ba,pt %xcc, 30f; \ add %g1, 0x30, %g1; \ 23: sethi %hi(1 << 14), %g7; \ add %g2, %g7, %g2; \ srlx %g2, 14, %g7; \ cmp %g7, 4; \ bl,pt %xcc, 21b; \ nop; \ add %g1, 0x70, %g1; \ 30: /* %g1 now points to E-cache logging area */ \ andn %g5, (32 - 1), %g2; /* E-cache subblock */ \ stx %g2, [%g1 + 0x20]; \ ldxa [%g2] ASI_EC_TAG_DATA, %g7; \ stx %g7, [%g1 + 0x28]; \ ldxa [%g2] ASI_EC_R, %g0; \ clr %g3; \ 31: ldxa [%g3] ASI_EC_DATA, %g7; \ stx %g7, [%g1 + %g3]; \ add %g3, 0x8, %g3; \ cmp %g3, 0x20; \ bl,pt %xcc, 31b; \ nop; \ 80: /* DONE */ /* These get patched into the trap table at boot time * once we know we have a cheetah processor. */ .globl cheetah_fecc_trap_vector, cheetah_fecc_trap_vector_tl1 cheetah_fecc_trap_vector: membar #Sync ldxa [%g0] ASI_DCU_CONTROL_REG, %g1 andn %g1, DCU_DC | DCU_IC, %g1 stxa %g1, [%g0] ASI_DCU_CONTROL_REG membar #Sync sethi %hi(cheetah_fast_ecc), %g2 jmpl %g2 + %lo(cheetah_fast_ecc), %g0 mov 0, %g1 cheetah_fecc_trap_vector_tl1: membar #Sync ldxa [%g0] ASI_DCU_CONTROL_REG, %g1 andn %g1, DCU_DC | DCU_IC, %g1 stxa %g1, [%g0] ASI_DCU_CONTROL_REG membar #Sync sethi %hi(cheetah_fast_ecc), %g2 jmpl %g2 + %lo(cheetah_fast_ecc), %g0 mov 1, %g1 .globl cheetah_cee_trap_vector, cheetah_cee_trap_vector_tl1 cheetah_cee_trap_vector: membar #Sync ldxa [%g0] ASI_DCU_CONTROL_REG, %g1 andn %g1, DCU_IC, %g1 stxa %g1, [%g0] ASI_DCU_CONTROL_REG membar #Sync sethi %hi(cheetah_cee), %g2 jmpl %g2 + %lo(cheetah_cee), %g0 mov 0, %g1 cheetah_cee_trap_vector_tl1: membar #Sync ldxa [%g0] ASI_DCU_CONTROL_REG, %g1 andn %g1, DCU_IC, %g1 stxa %g1, [%g0] ASI_DCU_CONTROL_REG membar #Sync sethi %hi(cheetah_cee), %g2 jmpl %g2 + %lo(cheetah_cee), %g0 mov 1, %g1 .globl cheetah_deferred_trap_vector, cheetah_deferred_trap_vector_tl1 cheetah_deferred_trap_vector: membar #Sync ldxa [%g0] ASI_DCU_CONTROL_REG, %g1; andn %g1, DCU_DC | DCU_IC, %g1; stxa %g1, [%g0] ASI_DCU_CONTROL_REG; membar #Sync; sethi %hi(cheetah_deferred_trap), %g2 jmpl %g2 + %lo(cheetah_deferred_trap), %g0 mov 0, %g1 cheetah_deferred_trap_vector_tl1: membar #Sync; ldxa [%g0] ASI_DCU_CONTROL_REG, %g1; andn %g1, DCU_DC | DCU_IC, %g1; stxa %g1, [%g0] ASI_DCU_CONTROL_REG; membar #Sync; sethi %hi(cheetah_deferred_trap), %g2 jmpl %g2 + %lo(cheetah_deferred_trap), %g0 mov 1, %g1 /* Cheetah+ specific traps. These are for the new I/D cache parity * error traps. The first argument to cheetah_plus_parity_handler * is encoded as follows: * * Bit0: 0=dcache,1=icache * Bit1: 0=recoverable,1=unrecoverable */ .globl cheetah_plus_dcpe_trap_vector, cheetah_plus_dcpe_trap_vector_tl1 cheetah_plus_dcpe_trap_vector: membar #Sync sethi %hi(do_cheetah_plus_data_parity), %g7 jmpl %g7 + %lo(do_cheetah_plus_data_parity), %g0 nop nop nop nop nop do_cheetah_plus_data_parity: ba,pt %xcc, etrap rd %pc, %g7 mov 0x0, %o0 call cheetah_plus_parity_error add %sp, PTREGS_OFF, %o1 ba,pt %xcc, rtrap clr %l6 cheetah_plus_dcpe_trap_vector_tl1: membar #Sync wrpr PSTATE_IG | PSTATE_PEF | PSTATE_PRIV, %pstate sethi %hi(do_dcpe_tl1), %g3 jmpl %g3 + %lo(do_dcpe_tl1), %g0 nop nop nop nop .globl cheetah_plus_icpe_trap_vector, cheetah_plus_icpe_trap_vector_tl1 cheetah_plus_icpe_trap_vector: membar #Sync sethi %hi(do_cheetah_plus_insn_parity), %g7 jmpl %g7 + %lo(do_cheetah_plus_insn_parity), %g0 nop nop nop nop nop do_cheetah_plus_insn_parity: ba,pt %xcc, etrap rd %pc, %g7 mov 0x1, %o0 call cheetah_plus_parity_error add %sp, PTREGS_OFF, %o1 ba,pt %xcc, rtrap clr %l6 cheetah_plus_icpe_trap_vector_tl1: membar #Sync wrpr PSTATE_IG | PSTATE_PEF | PSTATE_PRIV, %pstate sethi %hi(do_icpe_tl1), %g3 jmpl %g3 + %lo(do_icpe_tl1), %g0 nop nop nop nop /* If we take one of these traps when tl >= 1, then we * jump to interrupt globals. If some trap level above us * was also using interrupt globals, we cannot recover. * We may use all interrupt global registers except %g6. */ .globl do_dcpe_tl1, do_icpe_tl1 do_dcpe_tl1: rdpr %tl, %g1 ! Save original trap level mov 1, %g2 ! Setup TSTATE checking loop sethi %hi(TSTATE_IG), %g3 ! TSTATE mask bit 1: wrpr %g2, %tl ! Set trap level to check rdpr %tstate, %g4 ! Read TSTATE for this level andcc %g4, %g3, %g0 ! Interrupt globals in use? bne,a,pn %xcc, do_dcpe_tl1_fatal ! Yep, irrecoverable wrpr %g1, %tl ! Restore original trap level add %g2, 1, %g2 ! Next trap level cmp %g2, %g1 ! Hit them all yet? ble,pt %icc, 1b ! Not yet nop wrpr %g1, %tl ! Restore original trap level do_dcpe_tl1_nonfatal: /* Ok we may use interrupt globals safely. */ /* Reset D-cache parity */ sethi %hi(1 << 16), %g1 ! D-cache size mov (1 << 5), %g2 ! D-cache line size sub %g1, %g2, %g1 ! Move down 1 cacheline 1: srl %g1, 14, %g3 ! Compute UTAG membar #Sync stxa %g3, [%g1] ASI_DCACHE_UTAG membar #Sync sub %g2, 8, %g3 ! 64-bit data word within line 2: membar #Sync stxa %g0, [%g1 + %g3] ASI_DCACHE_DATA membar #Sync subcc %g3, 8, %g3 ! Next 64-bit data word bge,pt %icc, 2b nop subcc %g1, %g2, %g1 ! Next cacheline bge,pt %icc, 1b nop ba,pt %xcc, dcpe_icpe_tl1_common nop do_dcpe_tl1_fatal: sethi %hi(1f), %g7 ba,pt %xcc, etraptl1 1: or %g7, %lo(1b), %g7 mov 0x2, %o0 call cheetah_plus_parity_error add %sp, PTREGS_OFF, %o1 ba,pt %xcc, rtrap clr %l6 do_icpe_tl1: rdpr %tl, %g1 ! Save original trap level mov 1, %g2 ! Setup TSTATE checking loop sethi %hi(TSTATE_IG), %g3 ! TSTATE mask bit 1: wrpr %g2, %tl ! Set trap level to check rdpr %tstate, %g4 ! Read TSTATE for this level andcc %g4, %g3, %g0 ! Interrupt globals in use? bne,a,pn %xcc, do_icpe_tl1_fatal ! Yep, irrecoverable wrpr %g1, %tl ! Restore original trap level add %g2, 1, %g2 ! Next trap level cmp %g2, %g1 ! Hit them all yet? ble,pt %icc, 1b ! Not yet nop wrpr %g1, %tl ! Restore original trap level do_icpe_tl1_nonfatal: /* Ok we may use interrupt globals safely. */ /* Flush I-cache */ sethi %hi(1 << 15), %g1 ! I-cache size mov (1 << 5), %g2 ! I-cache line size sub %g1, %g2, %g1 1: or %g1, (2 << 3), %g3 stxa %g0, [%g3] ASI_IC_TAG membar #Sync subcc %g1, %g2, %g1 bge,pt %icc, 1b nop ba,pt %xcc, dcpe_icpe_tl1_common nop do_icpe_tl1_fatal: sethi %hi(1f), %g7 ba,pt %xcc, etraptl1 1: or %g7, %lo(1b), %g7 mov 0x3, %o0 call cheetah_plus_parity_error add %sp, PTREGS_OFF, %o1 ba,pt %xcc, rtrap clr %l6 dcpe_icpe_tl1_common: /* Flush D-cache, re-enable D/I caches in DCU and finally * retry the trapping instruction. */ sethi %hi(1 << 16), %g1 ! D-cache size mov (1 << 5), %g2 ! D-cache line size sub %g1, %g2, %g1 1: stxa %g0, [%g1] ASI_DCACHE_TAG membar #Sync subcc %g1, %g2, %g1 bge,pt %icc, 1b nop ldxa [%g0] ASI_DCU_CONTROL_REG, %g1 or %g1, (DCU_DC | DCU_IC), %g1 stxa %g1, [%g0] ASI_DCU_CONTROL_REG membar #Sync retry /* Cheetah FECC trap handling, we get here from tl{0,1}_fecc * in the trap table. That code has done a memory barrier * and has disabled both the I-cache and D-cache in the DCU * control register. The I-cache is disabled so that we may * capture the corrupted cache line, and the D-cache is disabled * because corrupt data may have been placed there and we don't * want to reference it. * * %g1 is one if this trap occurred at %tl >= 1. * * Next, we turn off error reporting so that we don't recurse. */ .globl cheetah_fast_ecc cheetah_fast_ecc: ldxa [%g0] ASI_ESTATE_ERROR_EN, %g2 andn %g2, ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN, %g2 stxa %g2, [%g0] ASI_ESTATE_ERROR_EN membar #Sync /* Fetch and clear AFSR/AFAR */ ldxa [%g0] ASI_AFSR, %g4 ldxa [%g0] ASI_AFAR, %g5 stxa %g4, [%g0] ASI_AFSR membar #Sync CHEETAH_LOG_ERROR rdpr %pil, %g2 wrpr %g0, 15, %pil ba,pt %xcc, etrap_irq rd %pc, %g7 mov %l4, %o1 mov %l5, %o2 call cheetah_fecc_handler add %sp, PTREGS_OFF, %o0 ba,a,pt %xcc, rtrap_irq /* Our caller has disabled I-cache and performed membar Sync. */ .globl cheetah_cee cheetah_cee: ldxa [%g0] ASI_ESTATE_ERROR_EN, %g2 andn %g2, ESTATE_ERROR_CEEN, %g2 stxa %g2, [%g0] ASI_ESTATE_ERROR_EN membar #Sync /* Fetch and clear AFSR/AFAR */ ldxa [%g0] ASI_AFSR, %g4 ldxa [%g0] ASI_AFAR, %g5 stxa %g4, [%g0] ASI_AFSR membar #Sync CHEETAH_LOG_ERROR rdpr %pil, %g2 wrpr %g0, 15, %pil ba,pt %xcc, etrap_irq rd %pc, %g7 mov %l4, %o1 mov %l5, %o2 call cheetah_cee_handler add %sp, PTREGS_OFF, %o0 ba,a,pt %xcc, rtrap_irq /* Our caller has disabled I-cache+D-cache and performed membar Sync. */ .globl cheetah_deferred_trap cheetah_deferred_trap: ldxa [%g0] ASI_ESTATE_ERROR_EN, %g2 andn %g2, ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN, %g2 stxa %g2, [%g0] ASI_ESTATE_ERROR_EN membar #Sync /* Fetch and clear AFSR/AFAR */ ldxa [%g0] ASI_AFSR, %g4 ldxa [%g0] ASI_AFAR, %g5 stxa %g4, [%g0] ASI_AFSR membar #Sync CHEETAH_LOG_ERROR rdpr %pil, %g2 wrpr %g0, 15, %pil ba,pt %xcc, etrap_irq rd %pc, %g7 mov %l4, %o1 mov %l5, %o2 call cheetah_deferred_handler add %sp, PTREGS_OFF, %o0 ba,a,pt %xcc, rtrap_irq .globl __do_privact __do_privact: mov TLB_SFSR, %g3 stxa %g0, [%g3] ASI_DMMU ! Clear FaultValid bit membar #Sync sethi %hi(109f), %g7 ba,pt %xcc, etrap 109: or %g7, %lo(109b), %g7 call do_privact add %sp, PTREGS_OFF, %o0 ba,pt %xcc, rtrap clr %l6 .globl do_mna do_mna: rdpr %tl, %g3 cmp %g3, 1 /* Setup %g4/%g5 now as they are used in the * winfixup code. */ mov TLB_SFSR, %g3 mov DMMU_SFAR, %g4 ldxa [%g4] ASI_DMMU, %g4 ldxa [%g3] ASI_DMMU, %g5 stxa %g0, [%g3] ASI_DMMU ! Clear FaultValid bit membar #Sync bgu,pn %icc, winfix_mna rdpr %tpc, %g3 1: sethi %hi(109f), %g7 ba,pt %xcc, etrap 109: or %g7, %lo(109b), %g7 mov %l4, %o1 mov %l5, %o2 call mem_address_unaligned add %sp, PTREGS_OFF, %o0 ba,pt %xcc, rtrap clr %l6 .globl do_lddfmna do_lddfmna: sethi %hi(109f), %g7 mov TLB_SFSR, %g4 ldxa [%g4] ASI_DMMU, %g5 stxa %g0, [%g4] ASI_DMMU ! Clear FaultValid bit membar #Sync mov DMMU_SFAR, %g4 ldxa [%g4] ASI_DMMU, %g4 ba,pt %xcc, etrap 109: or %g7, %lo(109b), %g7 mov %l4, %o1 mov %l5, %o2 call handle_lddfmna add %sp, PTREGS_OFF, %o0 ba,pt %xcc, rtrap clr %l6 .globl do_stdfmna do_stdfmna: sethi %hi(109f), %g7 mov TLB_SFSR, %g4 ldxa [%g4] ASI_DMMU, %g5 stxa %g0, [%g4] ASI_DMMU ! Clear FaultValid bit membar #Sync mov DMMU_SFAR, %g4 ldxa [%g4] ASI_DMMU, %g4 ba,pt %xcc, etrap 109: or %g7, %lo(109b), %g7 mov %l4, %o1 mov %l5, %o2 call handle_stdfmna add %sp, PTREGS_OFF, %o0 ba,pt %xcc, rtrap clr %l6 .globl breakpoint_trap breakpoint_trap: call sparc_breakpoint add %sp, PTREGS_OFF, %o0 ba,pt %xcc, rtrap nop #if defined(CONFIG_SUNOS_EMUL) || defined(CONFIG_SOLARIS_EMUL) || \ defined(CONFIG_SOLARIS_EMUL_MODULE) /* SunOS uses syscall zero as the 'indirect syscall' it looks * like indir_syscall(scall_num, arg0, arg1, arg2...); etc. * This is complete brain damage. */ .globl sunos_indir sunos_indir: srl %o0, 0, %o0 mov %o7, %l4 cmp %o0, NR_SYSCALLS blu,a,pt %icc, 1f sll %o0, 0x2, %o0 sethi %hi(sunos_nosys), %l6 b,pt %xcc, 2f or %l6, %lo(sunos_nosys), %l6 1: sethi %hi(sunos_sys_table), %l7 or %l7, %lo(sunos_sys_table), %l7 lduw [%l7 + %o0], %l6 2: mov %o1, %o0 mov %o2, %o1 mov %o3, %o2 mov %o4, %o3 mov %o5, %o4 call %l6 mov %l4, %o7 .globl sunos_getpid sunos_getpid: call sys_getppid nop call sys_getpid stx %o0, [%sp + PTREGS_OFF + PT_V9_I1] b,pt %xcc, ret_sys_call stx %o0, [%sp + PTREGS_OFF + PT_V9_I0] /* SunOS getuid() returns uid in %o0 and euid in %o1 */ .globl sunos_getuid sunos_getuid: call sys32_geteuid16 nop call sys32_getuid16 stx %o0, [%sp + PTREGS_OFF + PT_V9_I1] b,pt %xcc, ret_sys_call stx %o0, [%sp + PTREGS_OFF + PT_V9_I0] /* SunOS getgid() returns gid in %o0 and egid in %o1 */ .globl sunos_getgid sunos_getgid: call sys32_getegid16 nop call sys32_getgid16 stx %o0, [%sp + PTREGS_OFF + PT_V9_I1] b,pt %xcc, ret_sys_call stx %o0, [%sp + PTREGS_OFF + PT_V9_I0] #endif /* SunOS's execv() call only specifies the argv argument, the * environment settings are the same as the calling processes. */ .globl sunos_execv sys_execve: sethi %hi(sparc_execve), %g1 ba,pt %xcc, execve_merge or %g1, %lo(sparc_execve), %g1 #ifdef CONFIG_COMPAT .globl sys_execve sunos_execv: stx %g0, [%sp + PTREGS_OFF + PT_V9_I2] .globl sys32_execve sys32_execve: sethi %hi(sparc32_execve), %g1 or %g1, %lo(sparc32_execve), %g1 #endif execve_merge: flushw jmpl %g1, %g0 add %sp, PTREGS_OFF, %o0 .globl sys_pipe, sys_sigpause, sys_nis_syscall .globl sys_sigsuspend, sys_rt_sigsuspend .globl sys_rt_sigreturn .globl sys_ptrace .globl sys_sigaltstack .align 32 sys_pipe: ba,pt %xcc, sparc_pipe add %sp, PTREGS_OFF, %o0 sys_nis_syscall:ba,pt %xcc, c_sys_nis_syscall add %sp, PTREGS_OFF, %o0 sys_memory_ordering: ba,pt %xcc, sparc_memory_ordering add %sp, PTREGS_OFF, %o1 sys_sigaltstack:ba,pt %xcc, do_sigaltstack add %i6, STACK_BIAS, %o2 #ifdef CONFIG_COMPAT .globl sys32_sigstack sys32_sigstack: ba,pt %xcc, do_sys32_sigstack mov %i6, %o2 .globl sys32_sigaltstack sys32_sigaltstack: ba,pt %xcc, do_sys32_sigaltstack mov %i6, %o2 #endif .align 32 sys_sigsuspend: add %sp, PTREGS_OFF, %o0 call do_sigsuspend add %o7, 1f-.-4, %o7 nop sys_rt_sigsuspend: /* NOTE: %o0,%o1 have a correct value already */ add %sp, PTREGS_OFF, %o2 call do_rt_sigsuspend add %o7, 1f-.-4, %o7 nop #ifdef CONFIG_COMPAT .globl sys32_rt_sigsuspend sys32_rt_sigsuspend: /* NOTE: %o0,%o1 have a correct value already */ srl %o0, 0, %o0 add %sp, PTREGS_OFF, %o2 call do_rt_sigsuspend32 add %o7, 1f-.-4, %o7 #endif /* NOTE: %o0 has a correct value already */ sys_sigpause: add %sp, PTREGS_OFF, %o1 call do_sigpause add %o7, 1f-.-4, %o7 nop #ifdef CONFIG_COMPAT .globl sys32_sigreturn sys32_sigreturn: add %sp, PTREGS_OFF, %o0 call do_sigreturn32 add %o7, 1f-.-4, %o7 nop #endif sys_rt_sigreturn: add %sp, PTREGS_OFF, %o0 call do_rt_sigreturn add %o7, 1f-.-4, %o7 nop #ifdef CONFIG_COMPAT .globl sys32_rt_sigreturn sys32_rt_sigreturn: add %sp, PTREGS_OFF, %o0 call do_rt_sigreturn32 add %o7, 1f-.-4, %o7 nop #endif sys_ptrace: add %sp, PTREGS_OFF, %o0 call do_ptrace add %o7, 1f-.-4, %o7 nop .align 32 1: ldx [%curptr + TI_FLAGS], %l5 andcc %l5, _TIF_SYSCALL_TRACE, %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, sparc_do_fork add %sp, PTREGS_OFF, %o2 ret_from_syscall: /* Clear SPARC_FLAG_NEWCHILD, switch_to leaves thread.flags in * %o7 for us. Check performance counter stuff too. */ andn %o7, _TIF_NEWCHILD, %l0 stx %l0, [%g6 + TI_FLAGS] call schedule_tail mov %g7, %o0 andcc %l0, _TIF_PERFCTR, %g0 be,pt %icc, 1f nop ldx [%g6 + TI_PCR], %o7 wr %g0, %o7, %pcr /* Blackbird errata workaround. See commentary in * smp.c:smp_percpu_timer_interrupt() for more * information. */ ba,pt %xcc, 99f nop .align 64 99: wr %g0, %g0, %pic rd %pic, %g0 1: b,pt %xcc, ret_sys_call ldx [%sp + PTREGS_OFF + PT_V9_I0], %o0 sparc_exit: wrpr %g0, (PSTATE_RMO | PSTATE_PEF | PSTATE_PRIV), %pstate rdpr %otherwin, %g1 rdpr %cansave, %g3 add %g3, %g1, %g3 wrpr %g3, 0x0, %cansave wrpr %g0, 0x0, %otherwin wrpr %g0, (PSTATE_RMO | PSTATE_PEF | PSTATE_PRIV | PSTATE_IE), %pstate ba,pt %xcc, sys_exit stb %g0, [%g6 + TI_WSAVED] linux_sparc_ni_syscall: sethi %hi(sys_ni_syscall), %l7 b,pt %xcc, 4f or %l7, %lo(sys_ni_syscall), %l7 linux_syscall_trace32: 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 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, %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 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, %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 + 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. */ ldx [%curptr + TI_FLAGS], %l0 andcc %l0, _TIF_SYSCALL_SUCCESS, %g0 be,pt %icc, 1f andn %l0, _TIF_SYSCALL_SUCCESS, %l0 ba,pt %xcc, 80f stx %l0, [%curptr + TI_FLAGS] 1: cmp %o0, -ERESTART_RESTARTBLOCK bgeu,pn %xcc, 1f andcc %l0, _TIF_SYSCALL_TRACE, %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, %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: call syscall_trace nop 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