/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #pragma ident "%Z%%M% %I% %E% SMI" /* * SFMMU primitives. These primitives should only be used by sfmmu * routines. */ #if defined(lint) #include #else /* lint */ #include "assym.h" #endif /* lint */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * sfmmu related subroutines */ #if defined (lint) /* * sfmmu related subroutines */ /* ARGSUSED */ void sfmmu_raise_tsb_exception(uint64_t sfmmup, uint64_t rctx) {} /* ARGSUSED */ void sfmmu_itlb_ld_kva(caddr_t vaddr, tte_t *tte) {} /* ARGSUSED */ void sfmmu_dtlb_ld_kva(caddr_t vaddr, tte_t *tte) {} int sfmmu_getctx_pri() { return(0); } int sfmmu_getctx_sec() { return(0); } /* ARGSUSED */ void sfmmu_setctx_sec(uint_t ctx) {} /* ARGSUSED */ void sfmmu_load_mmustate(sfmmu_t *sfmmup) { } #else /* lint */ /* * Invalidate either the context of a specific victim or any process * currently running on this CPU. * * %g1 = sfmmup whose ctx is being invalidated * when called from sfmmu_wrap_around, %g1 == INVALID_CONTEXT * Note %g1 is the only input argument used by this xcall handler. */ ENTRY(sfmmu_raise_tsb_exception) ! ! if (victim == INVALID_CONTEXT || ! current CPU tsbmiss->usfmmup == victim sfmmup) { ! if (shctx_on) { ! shctx = INVALID; ! } ! if (sec-ctx > INVALID_CONTEXT) { ! write INVALID_CONTEXT to sec-ctx ! } ! if (pri-ctx > INVALID_CONTEXT) { ! write INVALID_CONTEXT to pri-ctx ! } ! } sethi %hi(ksfmmup), %g3 ldx [%g3 + %lo(ksfmmup)], %g3 cmp %g1, %g3 be,a,pn %xcc, ptl1_panic /* can't invalidate kernel ctx */ mov PTL1_BAD_RAISE_TSBEXCP, %g1 set INVALID_CONTEXT, %g2 cmp %g1, INVALID_CONTEXT be,pn %xcc, 0f /* called from wrap_around? */ mov MMU_SCONTEXT, %g3 CPU_TSBMISS_AREA(%g5, %g6) /* load cpu tsbmiss area */ ldx [%g5 + TSBMISS_UHATID], %g5 /* load usfmmup */ cmp %g5, %g1 /* hat toBe-invalid running? */ bne,pt %xcc, 3f nop 0: sethi %hi(shctx_on), %g5 ld [%g5 + %lo(shctx_on)], %g5 brz %g5, 1f mov MMU_SHARED_CONTEXT, %g5 sethi %hi(FLUSH_ADDR), %g4 stxa %g0, [%g5]ASI_MMU_CTX flush %g4 1: ldxa [%g3]ASI_MMU_CTX, %g5 /* %g5 = pgsz | sec-ctx */ set CTXREG_CTX_MASK, %g4 and %g5, %g4, %g5 /* %g5 = sec-ctx */ cmp %g5, INVALID_CONTEXT /* kernel ctx or invald ctx? */ ble,pn %xcc, 2f /* yes, no need to change */ mov MMU_PCONTEXT, %g7 stxa %g2, [%g3]ASI_MMU_CTX /* set invalid ctx */ membar #Sync 2: ldxa [%g7]ASI_MMU_CTX, %g3 /* get pgz | pri-ctx */ and %g3, %g4, %g5 /* %g5 = pri-ctx */ cmp %g5, INVALID_CONTEXT /* kernel ctx or invald ctx? */ ble,pn %xcc, 3f /* yes, no need to change */ srlx %g3, CTXREG_NEXT_SHIFT, %g3 /* %g3 = nucleus pgsz */ sllx %g3, CTXREG_NEXT_SHIFT, %g3 /* need to preserve nucleus pgsz */ or %g3, %g2, %g2 /* %g2 = nucleus pgsz | INVALID_CONTEXT */ stxa %g2, [%g7]ASI_MMU_CTX /* set pri-ctx to invalid */ 3: retry SET_SIZE(sfmmu_raise_tsb_exception) /* * %o0 = virtual address * %o1 = address of TTE to be loaded */ ENTRY_NP(sfmmu_itlb_ld_kva) rdpr %pstate, %o3 #ifdef DEBUG PANIC_IF_INTR_DISABLED_PSTR(%o3, msfmmu_di_l1, %g1) #endif /* DEBUG */ wrpr %o3, PSTATE_IE, %pstate ! Disable interrupts srln %o0, MMU_PAGESHIFT, %o0 slln %o0, MMU_PAGESHIFT, %o0 ! Clear page offset ldx [%o1], %g1 set MMU_TAG_ACCESS, %o5 #ifdef CHEETAHPLUS_ERRATUM_34 ! ! If this is Cheetah or derivative and the specified TTE is locked ! and hence to be loaded into the T16, fully-associative TLB, we ! must avoid Cheetah+ erratum 34. In Cheetah+ erratum 34, under ! certain conditions an ITLB locked index 0 TTE will erroneously be ! displaced when a new TTE is loaded via ASI_ITLB_IN. To avoid ! this erratum, we scan the T16 top down for an unlocked TTE and ! explicitly load the specified TTE into that index. ! GET_CPU_IMPL(%g2) cmp %g2, CHEETAH_IMPL bl,pn %icc, 0f nop andcc %g1, TTE_LCK_INT, %g0 bz %icc, 0f ! Lock bit is not set; ! load normally. or %g0, (15 << 3), %g3 ! Start searching from the ! top down. 1: ldxa [%g3]ASI_ITLB_ACCESS, %g4 ! Load TTE from t16 ! ! If this entry isn't valid, we'll choose to displace it (regardless ! of the lock bit). ! cmp %g4, %g0 bge %xcc, 2f ! TTE is > 0 iff not valid andcc %g4, TTE_LCK_INT, %g0 ! Check for lock bit bz %icc, 2f ! If unlocked, go displace nop sub %g3, (1 << 3), %g3 brgz %g3, 1b ! Still more TLB entries nop ! to search sethi %hi(sfmmu_panic5), %o0 ! We searched all entries and call panic ! found no unlocked TTE so or %o0, %lo(sfmmu_panic5), %o0 ! give up. 2: ! ! We have found an unlocked or non-valid entry; we'll explicitly load ! our locked entry here. ! sethi %hi(FLUSH_ADDR), %o1 ! Flush addr doesn't matter stxa %o0, [%o5]ASI_IMMU stxa %g1, [%g3]ASI_ITLB_ACCESS flush %o1 ! Flush required for I-MMU ba 3f ! Delay slot of ba is empty nop ! per Erratum 64 0: #endif /* CHEETAHPLUS_ERRATUM_34 */ sethi %hi(FLUSH_ADDR), %o1 ! Flush addr doesn't matter stxa %o0, [%o5]ASI_IMMU stxa %g1, [%g0]ASI_ITLB_IN flush %o1 ! Flush required for I-MMU 3: retl wrpr %g0, %o3, %pstate ! Enable interrupts SET_SIZE(sfmmu_itlb_ld_kva) /* * Load an entry into the DTLB. * * Special handling is required for locked entries since there * are some TLB slots that are reserved for the kernel but not * always held locked. We want to avoid loading locked TTEs * into those slots since they could be displaced. * * %o0 = virtual address * %o1 = address of TTE to be loaded */ ENTRY_NP(sfmmu_dtlb_ld_kva) rdpr %pstate, %o3 #ifdef DEBUG PANIC_IF_INTR_DISABLED_PSTR(%o3, msfmmu_di_l2, %g1) #endif /* DEBUG */ wrpr %o3, PSTATE_IE, %pstate ! disable interrupts srln %o0, MMU_PAGESHIFT, %o0 slln %o0, MMU_PAGESHIFT, %o0 ! clear page offset ldx [%o1], %g1 set MMU_TAG_ACCESS, %o5 set cpu_impl_dual_pgsz, %o2 ld [%o2], %o2 brz %o2, 1f nop sethi %hi(ksfmmup), %o2 ldx [%o2 + %lo(ksfmmup)], %o2 ldub [%o2 + SFMMU_CEXT], %o2 sll %o2, TAGACCEXT_SHIFT, %o2 set MMU_TAG_ACCESS_EXT, %o4 ! can go into T8 if unlocked stxa %o2,[%o4]ASI_DMMU membar #Sync 1: andcc %g1, TTE_LCK_INT, %g0 ! Locked entries require bnz,pn %icc, 2f ! special handling sethi %hi(dtlb_resv_ttenum), %g3 stxa %o0,[%o5]ASI_DMMU ! Load unlocked TTE stxa %g1,[%g0]ASI_DTLB_IN ! via DTLB_IN membar #Sync retl wrpr %g0, %o3, %pstate ! enable interrupts 2: ld [%g3 + %lo(dtlb_resv_ttenum)], %g3 sll %g3, 3, %g3 ! First reserved idx in TLB 0 sub %g3, (1 << 3), %g3 ! Decrement idx 3: ldxa [%g3]ASI_DTLB_ACCESS, %g4 ! Load TTE from TLB 0 ! ! If this entry isn't valid, we'll choose to displace it (regardless ! of the lock bit). ! brgez,pn %g4, 4f ! TTE is > 0 iff not valid nop andcc %g4, TTE_LCK_INT, %g0 ! Check for lock bit bz,pn %icc, 4f ! If unlocked, go displace nop sub %g3, (1 << 3), %g3 ! Decrement idx brgez %g3, 3b nop sethi %hi(sfmmu_panic5), %o0 ! We searched all entries and call panic ! found no unlocked TTE so or %o0, %lo(sfmmu_panic5), %o0 ! give up. 4: stxa %o0,[%o5]ASI_DMMU ! Setup tag access #ifdef OLYMPUS_SHARED_FTLB stxa %g1,[%g0]ASI_DTLB_IN #else stxa %g1,[%g3]ASI_DTLB_ACCESS ! Displace entry at idx #endif membar #Sync retl wrpr %g0, %o3, %pstate ! enable interrupts SET_SIZE(sfmmu_dtlb_ld_kva) ENTRY_NP(sfmmu_getctx_pri) set MMU_PCONTEXT, %o0 retl ldxa [%o0]ASI_MMU_CTX, %o0 SET_SIZE(sfmmu_getctx_pri) ENTRY_NP(sfmmu_getctx_sec) set MMU_SCONTEXT, %o0 set CTXREG_CTX_MASK, %o1 ldxa [%o0]ASI_MMU_CTX, %o0 retl and %o0, %o1, %o0 SET_SIZE(sfmmu_getctx_sec) /* * Set the secondary context register for this process. * %o0 = page_size | context number for this process. */ ENTRY_NP(sfmmu_setctx_sec) /* * From resume we call sfmmu_setctx_sec with interrupts disabled. * But we can also get called from C with interrupts enabled. So, * we need to check first. */ /* If interrupts are not disabled, then disable them */ rdpr %pstate, %g1 btst PSTATE_IE, %g1 bnz,a,pt %icc, 1f wrpr %g1, PSTATE_IE, %pstate /* disable interrupts */ 1: mov MMU_SCONTEXT, %o1 sethi %hi(FLUSH_ADDR), %o4 stxa %o0, [%o1]ASI_MMU_CTX /* set 2nd context reg. */ flush %o4 sethi %hi(shctx_on), %g3 ld [%g3 + %lo(shctx_on)], %g3 brz %g3, 2f nop set CTXREG_CTX_MASK, %o4 and %o0,%o4,%o1 cmp %o1, INVALID_CONTEXT bne,pn %icc, 2f mov MMU_SHARED_CONTEXT, %o1 sethi %hi(FLUSH_ADDR), %o4 stxa %g0, [%o1]ASI_MMU_CTX /* set 2nd context reg. */ flush %o4 /* * if the routine was entered with intr enabled, then enable intr now. * otherwise, keep intr disabled, return without enabing intr. * %g1 - old intr state */ 2: btst PSTATE_IE, %g1 bnz,a,pt %icc, 3f wrpr %g0, %g1, %pstate /* enable interrupts */ 3: retl nop SET_SIZE(sfmmu_setctx_sec) /* * set ktsb_phys to 1 if the processor supports ASI_QUAD_LDD_PHYS. * returns the detection value in %o0. * * Currently ASI_QUAD_LDD_PHYS is supported in processors as follows * - cheetah+ and later (greater or equal to CHEETAH_PLUS_IMPL) * - FJ OPL Olympus-C and later (less than SPITFIRE_IMPL) * */ ENTRY_NP(sfmmu_setup_4lp) GET_CPU_IMPL(%o0); cmp %o0, CHEETAH_PLUS_IMPL bge,pt %icc, 4f mov 1, %o1 cmp %o0, SPITFIRE_IMPL bge,a,pn %icc, 3f clr %o1 4: set ktsb_phys, %o2 st %o1, [%o2] 3: retl mov %o1, %o0 SET_SIZE(sfmmu_setup_4lp) /* * Called to load MMU registers and tsbmiss area * for the active process. This function should * only be called from TL=0. * * %o0 - hat pointer * */ ENTRY_NP(sfmmu_load_mmustate) #ifdef DEBUG PANIC_IF_INTR_ENABLED_PSTR(msfmmu_ei_l3, %g1) #endif /* DEBUG */ sethi %hi(ksfmmup), %o3 ldx [%o3 + %lo(ksfmmup)], %o3 cmp %o3, %o0 be,pn %xcc, 8f ! if kernel as, do nothing nop /* * We need to set up the TSB base register, tsbmiss * area, and load locked TTE(s) for the TSB. */ ldx [%o0 + SFMMU_TSB], %o1 ! %o1 = first tsbinfo ldx [%o1 + TSBINFO_NEXTPTR], %g2 ! %g2 = second tsbinfo #ifdef UTSB_PHYS /* * UTSB_PHYS accesses user TSBs via physical addresses. The first * TSB is in the MMU I/D TSB Base registers. The 2nd, 3rd and * 4th TSBs use designated ASI_SCRATCHPAD regs as pseudo TSB base regs. */ /* create/set first UTSBREG actually loaded into MMU_TSB */ MAKE_UTSBREG(%o1, %o2, %o3) ! %o2 = first utsbreg LOAD_TSBREG(%o2, %o3, %o4) ! write TSB base register brz,a,pt %g2, 2f mov -1, %o2 ! use -1 if no second TSB MAKE_UTSBREG(%g2, %o2, %o3) ! %o2 = second utsbreg 2: SET_UTSBREG(SCRATCHPAD_UTSBREG2, %o2, %o3) /* make 3rd and 4th TSB */ CPU_TSBMISS_AREA(%o4, %o3) ! %o4 = tsbmiss area ldx [%o0 + SFMMU_SCDP], %g2 ! %g2 = sfmmu_scd brz,pt %g2, 3f mov -1, %o2 ! use -1 if no third TSB ldx [%g2 + SCD_SFMMUP], %g3 ! %g3 = scdp->scd_sfmmup ldx [%g3 + SFMMU_TSB], %o1 ! %o1 = first scd tsbinfo brz,pn %o1, 5f nop ! panic if no third TSB /* make 3rd UTSBREG */ MAKE_UTSBREG(%o1, %o2, %o3) ! %o2 = third utsbreg 3: SET_UTSBREG(SCRATCHPAD_UTSBREG3, %o2, %o3) stn %o2, [%o4 + TSBMISS_TSBSCDPTR] brz,pt %g2, 4f mov -1, %o2 ! use -1 if no 3rd or 4th TSB ldx [%o1 + TSBINFO_NEXTPTR], %g2 ! %g2 = second scd tsbinfo brz,pt %g2, 4f mov -1, %o2 ! use -1 if no 4th TSB /* make 4th UTSBREG */ MAKE_UTSBREG(%g2, %o2, %o3) ! %o2 = fourth utsbreg 4: SET_UTSBREG(SCRATCHPAD_UTSBREG4, %o2, %o3) stn %o2, [%o4 + TSBMISS_TSBSCDPTR4M] ba,pt %icc, 6f mov %o4, %o2 ! %o2 = tsbmiss area 5: sethi %hi(panicstr), %g1 ! panic if no 3rd TSB ldx [%g1 + %lo(panicstr)], %g1 tst %g1 bnz,pn %xcc, 8f nop sethi %hi(sfmmu_panic10), %o0 call panic or %o0, %lo(sfmmu_panic10), %o0 #else /* UTSBREG_PHYS */ brz,pt %g2, 4f nop /* * We have a second TSB for this process, so we need to * encode data for both the first and second TSB in our single * TSB base register. See hat_sfmmu.h for details on what bits * correspond to which TSB. * We also need to load a locked TTE into the TLB for the second TSB * in this case. */ MAKE_TSBREG_SECTSB(%o2, %o1, %g2, %o3, %o4, %g3, sfmmu_tsb_2nd) ! %o2 = tsbreg sethi %hi(utsb4m_dtlb_ttenum), %o3 sethi %hi(utsb4m_vabase), %o4 ld [%o3 + %lo(utsb4m_dtlb_ttenum)], %o3 ldx [%o4 + %lo(utsb4m_vabase)], %o4 ! %o4 = TLB tag for sec TSB sll %o3, DTACC_SHIFT, %o3 ! %o3 = sec TSB TLB index RESV_OFFSET(%g2, %o4, %g3, sfmmu_tsb_2nd) ! or-in bits of TSB VA LOAD_TSBTTE(%g2, %o3, %o4, %g3) ! load sec TSB locked TTE sethi %hi(utsb_vabase), %g3 ldx [%g3 + %lo(utsb_vabase)], %g3 ! %g3 = TLB tag for first TSB ba,pt %xcc, 5f nop 4: sethi %hi(utsb_vabase), %g3 ldx [%g3 + %lo(utsb_vabase)], %g3 ! %g3 = TLB tag for first TSB MAKE_TSBREG(%o2, %o1, %g3, %o3, %o4, sfmmu_tsb_1st) ! %o2 = tsbreg 5: LOAD_TSBREG(%o2, %o3, %o4) ! write TSB base register /* * Load the TTE for the first TSB at the appropriate location in * the TLB */ sethi %hi(utsb_dtlb_ttenum), %o2 ld [%o2 + %lo(utsb_dtlb_ttenum)], %o2 sll %o2, DTACC_SHIFT, %o2 ! %o1 = first TSB TLB index RESV_OFFSET(%o1, %g3, %o3, sfmmu_tsb_1st) ! or-in bits of TSB VA LOAD_TSBTTE(%o1, %o2, %g3, %o4) ! load first TSB locked TTE CPU_TSBMISS_AREA(%o2, %o3) #endif /* UTSB_PHYS */ 6: ldx [%o0 + SFMMU_ISMBLKPA], %o1 ! copy members of sfmmu ! we need to access from stx %o1, [%o2 + TSBMISS_ISMBLKPA] ! sfmmu_tsb_miss into the ldub [%o0 + SFMMU_TTEFLAGS], %o3 ! per-CPU tsbmiss area. stx %o0, [%o2 + TSBMISS_UHATID] stub %o3, [%o2 + TSBMISS_UTTEFLAGS] #ifdef UTSB_PHYS ldx [%o0 + SFMMU_SRDP], %o1 ldub [%o0 + SFMMU_RTTEFLAGS], %o4 stub %o4, [%o2 + TSBMISS_URTTEFLAGS] stx %o1, [%o2 + TSBMISS_SHARED_UHATID] brz,pn %o1, 8f ! check for sfmmu_srdp add %o0, SFMMU_HMERMAP, %o1 add %o2, TSBMISS_SHMERMAP, %o2 mov SFMMU_HMERGNMAP_WORDS, %o3 ! set tsbmiss shmermap SET_REGION_MAP(%o1, %o2, %o3, %o4, load_shme_mmustate) ldx [%o0 + SFMMU_SCDP], %o4 ! %o4 = sfmmu_scd CPU_TSBMISS_AREA(%o2, %o3) ! %o2 = tsbmiss area mov SFMMU_HMERGNMAP_WORDS, %o3 brnz,pt %o4, 7f ! check for sfmmu_scdp else add %o2, TSBMISS_SCDSHMERMAP, %o2 ! zero tsbmiss scd_shmermap ZERO_REGION_MAP(%o2, %o3, zero_scd_mmustate) ba 8f nop 7: add %o4, SCD_HMERMAP, %o1 SET_REGION_MAP(%o1, %o2, %o3, %o4, load_scd_mmustate) #endif /* UTSB_PHYS */ 8: retl nop SET_SIZE(sfmmu_load_mmustate) #endif /* lint */ #if defined (lint) /* * Invalidate all of the entries within the tsb, by setting the inv bit * in the tte_tag field of each tsbe. * * We take advantage of the fact TSBs are page aligned and a multiple of * PAGESIZE to use block stores. * * See TSB_LOCK_ENTRY and the miss handlers for how this works in practice * (in short, we set all bits in the upper word of the tag, and we give the * invalid bit precedence over other tag bits in both places). */ /* ARGSUSED */ void sfmmu_inv_tsb_fast(caddr_t tsb_base, uint_t tsb_bytes) {} #else /* lint */ #define VIS_BLOCKSIZE 64 ENTRY(sfmmu_inv_tsb_fast) ! Get space for aligned block of saved fp regs. save %sp, -SA(MINFRAME + 2*VIS_BLOCKSIZE), %sp ! kpreempt_disable(); ldsb [THREAD_REG + T_PREEMPT], %l3 inc %l3 stb %l3, [THREAD_REG + T_PREEMPT] ! See if fpu was in use. If it was, we need to save off the ! floating point registers to the stack. rd %fprs, %l0 ! %l0 = cached copy of fprs btst FPRS_FEF, %l0 bz,pt %icc, 4f nop ! save in-use fpregs on stack membar #Sync ! make sure tranx to fp regs ! have completed add %fp, STACK_BIAS - 65, %l1 ! get stack frame for fp regs and %l1, -VIS_BLOCKSIZE, %l1 ! block align frame stda %d0, [%l1]ASI_BLK_P ! %l1 = addr of saved fp regs ! enable fp 4: membar #StoreStore|#StoreLoad|#LoadStore wr %g0, FPRS_FEF, %fprs wr %g0, ASI_BLK_P, %asi ! load up FP registers with invalid TSB tag. fone %d0 ! ones in tag fzero %d2 ! zeros in TTE fone %d4 ! ones in tag fzero %d6 ! zeros in TTE fone %d8 ! ones in tag fzero %d10 ! zeros in TTE fone %d12 ! ones in tag fzero %d14 ! zeros in TTE ba,pt %xcc, .sfmmu_inv_doblock mov (4*VIS_BLOCKSIZE), %i4 ! we do 4 stda's each loop below .sfmmu_inv_blkstart: ! stda %d0, [%i0+192]%asi ! in dly slot of branch that got us here stda %d0, [%i0+128]%asi stda %d0, [%i0+64]%asi stda %d0, [%i0]%asi add %i0, %i4, %i0 sub %i1, %i4, %i1 .sfmmu_inv_doblock: cmp %i1, (4*VIS_BLOCKSIZE) ! check for completion bgeu,a %icc, .sfmmu_inv_blkstart stda %d0, [%i0+192]%asi .sfmmu_inv_finish: membar #Sync btst FPRS_FEF, %l0 ! saved from above bz,a .sfmmu_inv_finished wr %l0, 0, %fprs ! restore fprs ! restore fpregs from stack ldda [%l1]ASI_BLK_P, %d0 membar #Sync wr %l0, 0, %fprs ! restore fprs .sfmmu_inv_finished: ! kpreempt_enable(); ldsb [THREAD_REG + T_PREEMPT], %l3 dec %l3 stb %l3, [THREAD_REG + T_PREEMPT] ret restore SET_SIZE(sfmmu_inv_tsb_fast) #endif /* lint */ #if defined(lint) /* * Prefetch "struct tsbe" while walking TSBs. * prefetch 7 cache lines ahead of where we are at now. * #n_reads is being used since #one_read only applies to * floating point reads, and we are not doing floating point * reads. However, this has the negative side effect of polluting * the ecache. * The 448 comes from (7 * 64) which is how far ahead of our current * address, we want to prefetch. */ /*ARGSUSED*/ void prefetch_tsbe_read(struct tsbe *tsbep) {} /* Prefetch the tsbe that we are about to write */ /*ARGSUSED*/ void prefetch_tsbe_write(struct tsbe *tsbep) {} #else /* lint */ ENTRY(prefetch_tsbe_read) retl prefetch [%o0+448], #n_reads SET_SIZE(prefetch_tsbe_read) ENTRY(prefetch_tsbe_write) retl prefetch [%o0], #n_writes SET_SIZE(prefetch_tsbe_write) #endif /* lint */