sun4v/cpu/niagara_asm.s

	niagara_asm.s revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#if !defined(lint)
#include "assym.h"
#endif

/*
 * Niagara processor specific assembly routines
 */

#include <sys/asm_linkage.h>
#include <sys/machasi.h>
#include <sys/machparam.h>
#include <sys/hypervisor_api.h>
#include <sys/niagararegs.h>
#include <sys/machasi.h>
#include <sys/niagaraasi.h>
#include <vm/hat_sfmmu.h>

#if defined(lint)
/*ARGSUSED*/
uint64_t
hv_niagara_getperf(uint64_t perfreg, uint64_t *datap)
{ return (0); }

/*ARGSUSED*/
uint64_t
hv_niagara_setperf(uint64_t perfreg, uint64_t data)
{ return (0); }

#else   /* lint */

    /*
     * hv_niagara_getperf(uint64_t perfreg, uint64_t *datap)
     */
    ENTRY(hv_niagara_getperf)
    mov %o1, %o4            ! save datap
    mov HV_NIAGARA_GETPERF, %o5
    ta  FAST_TRAP
    brz,a   %o0, 1f
    stx %o1, [%o4]
1:
    retl
    nop
    SET_SIZE(hv_niagara_getperf)

    /*
     * hv_niagara_setperf(uint64_t perfreg, uint64_t data)
     */
    ENTRY(hv_niagara_setperf)
    mov HV_NIAGARA_SETPERF, %o5
    ta  FAST_TRAP
    retl
    nop
    SET_SIZE(hv_niagara_setperf)

#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 that the TSBs are page aligned and a
 * multiple of PAGESIZE to use ASI_BLK_INIT_xxx ASI.
 *
 * 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
cpu_inv_tsb(caddr_t tsb_base, uint_t tsb_bytes)
{}

#else /* lint */

    ENTRY(cpu_inv_tsb)

    /*
     * The following code assumes that the tsb_base (%o0) is 256 bytes
     * aligned and the tsb_bytes count is multiple of 256 bytes.
     */

    wr  %g0, ASI_BLK_INIT_ST_QUAD_LDD_P, %asi
    set TSBTAG_INVALID, %o2
    sllx    %o2, 32, %o2        ! INV bit in upper 32 bits of the tag
1:
    stxa    %o2, [%o0+0x0]%asi
    stxa    %o2, [%o0+0x40]%asi
    stxa    %o2, [%o0+0x80]%asi
    stxa    %o2, [%o0+0xc0]%asi

    stxa    %o2, [%o0+0x10]%asi
    stxa    %o2, [%o0+0x20]%asi
    stxa    %o2, [%o0+0x30]%asi

    stxa    %o2, [%o0+0x50]%asi
    stxa    %o2, [%o0+0x60]%asi
    stxa    %o2, [%o0+0x70]%asi

    stxa    %o2, [%o0+0x90]%asi
    stxa    %o2, [%o0+0xa0]%asi
    stxa    %o2, [%o0+0xb0]%asi

    stxa    %o2, [%o0+0xd0]%asi
    stxa    %o2, [%o0+0xe0]%asi
    stxa    %o2, [%o0+0xf0]%asi

    subcc   %o1, 0x100, %o1
    bgu,pt  %ncc, 1b
    add %o0, 0x100, %o0

    membar  #Sync
    retl
    nop

    SET_SIZE(cpu_inv_tsb)
#endif /* lint */

#ifdef NIAGARA_ERRATUM_39

/*
 * This workaround will be removed prior to the FCS release.
 */

#if defined(lint)

/*ARGSUSED*/
uint64_t
niagara_getver(uint64_t ni_getver_ra, uint64_t *cpu_version)
{ return (0); }

#else   /* lint */

/*
 * The following hypervisor calls are used to get the CPU version register
 * for the workaround.
 */
#define HV_DIAG_RA2PA       0x200
#define HV_DIAG_HEXEC       0x201

    /*
     * niagara_getver(uint64_t ni_getver_ra, uint64_t *cpu_version)
     */
    ENTRY(niagara_getver)
    mov     %o1, %o4                ! save cpu_version pointer
    mov     HV_DIAG_RA2PA, %o5  ! get PA of ni_getver routine
    ta      FAST_TRAP
    brnz,pn %o0, 2f         ! return error in not successful
    nop

    mov %o1, %o0        ! move ni_getver PA to %o0
    mov     HV_DIAG_HEXEC, %o5
    ta      FAST_TRAP
    brnz,pn %o0, 2f
    nop

    stx   %o1, [%o4]        ! copy version
2:
    retl
    nop
    SET_SIZE(niagara_getver)

    /*
     * Hypervisor code sequence to get chip version via HV_DIAG_HEXEC.
     * Returns E_HOK in %o0 and %hver register value in %o1.
     */
    .global ni_getver
    .align  16
ni_getver:
    mov H_EOK, %o0
    rdhpr   %hver, %o1
    done

#endif  /* lint */

#endif NIAGARA_ERRATUM_39