hypervisor/src/greatlakes/ontario/src/hcall_cpu.s

/*
* ========== Copyright Header Begin ==========================================
*
* Hypervisor Software File: hcall_cpu.s
*
* Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
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*    or without modification, are permitted provided that the following
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*    Neither the name of Sun Microsystems, Inc. or the names of contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
*     This software is provided "AS IS," without a warranty of any kind.
* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
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* MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
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* ========== Copyright Header End ============================================
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/*
 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

        .ident  "@(#)hcall_cpu.s        1.98    07/05/03 SMI"

#include <sys/asm_linkage.h>
#include <asi.h>
#include <hprivregs.h>
#include <offsets.h>
#include <guest.h>
#include <util.h>

/*
 * Halt the current strand
 *
 * %g1          clobbered
 * %g2 - %g6    preserved
 * %g7          return address
 */
        ENTRY_NP(plat_halt_strand)
#ifdef NIAGARA_ERRATUM_39
        rdhpr   %hver, %g1
        srlx    %g1, VER_MASK_MAJOR_SHIFT, %g1
        and     %g1, VER_MASK_MAJOR_MASK, %g1
        cmp     %g1, 1          ! Check for Niagara 1.x
        bleu,pt %xcc, 1f
        nop
#endif
        rd      STR_STATUS_REG, %g1
        ! xor ACTIVE to clear it on current strand
        wr      %g1, STR_STATUS_STRAND_ACTIVE, STR_STATUS_REG
        ! skid
        nop
        nop
        nop
        nop
1:
        HVRET

        SET_SIZE(plat_halt_strand)