hypervisor/src/greatlakes/common/src/hvctl.s

/*
* ========== Copyright Header Begin ==========================================
*
* Hypervisor Software File: hvctl.s
*
* Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
*
*  - Do no alter or remove copyright notices
*
*  - Redistribution and use of this software in source and binary forms, with
*    or without modification, are permitted provided that the following
*    conditions are met:
*
*  - Redistribution of source code must retain the above copyright notice,
*    this list of conditions and the following disclaimer.
*
*  - Redistribution in binary form must reproduce the above copyright notice,
*    this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
*    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
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
* MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
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*
* ========== Copyright Header End ============================================
*/
/*
 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

        .ident  "@(#)hvctl.s    1.5     07/05/03 SMI"

/*
 * Hypervisor control interface
 */

#include <config.h>
#include <offsets.h>
#include <hvctl.h>
#include <vdev_intr.h>
#include <guest.h>
#include <strand.h>
#include <vcpu.h>
#include <abort.h>
#include <util.h>
#include <ldc.h>
#include <debug.h>
#include <sys/asm_linkage.h>
#include <sys/htypes.h>
#include <sparcv9/asi.h>
#include <asi.h>
#include <sun4v/queue.h>

/* FIXME: fix the files where these #defs to be visible */
#define IVDR_THREAD 8           /* XXX */


/*
 * callback for hv control
 *
 * %g1 = callback arg (config struct)
 * %g2 = payload
 * %g3 = size
 * %g7 = return address
 */
        ENTRY_NP(hvctl_svc_callback)

#define HVLDC_RD_IDATA(pload, conf, idx, tmp)                    \
        ldx     [pload + (idx*8)], tmp                          ;\
        stx     tmp, [conf + (CONFIG_HVCTL_IBUF+(idx*8))]

        HVLDC_RD_IDATA(%g2, %g1, 0, %g3)                ! load payload
        HVLDC_RD_IDATA(%g2, %g1, 1, %g3)
        HVLDC_RD_IDATA(%g2, %g1, 2, %g3)
        HVLDC_RD_IDATA(%g2, %g1, 3, %g3)
        HVLDC_RD_IDATA(%g2, %g1, 4, %g3)
        HVLDC_RD_IDATA(%g2, %g1, 5, %g3)
        HVLDC_RD_IDATA(%g2, %g1, 6, %g3)
        HVLDC_RD_IDATA(%g2, %g1, 7, %g3)

        STRAND_PUSH(%g7, %g2, %g3)

        HVCALL(vcpu_state_save)

        ! TODO: verify checksum match, drop packet on mismatch

        !
        ! zero reply buffer
        !
        ROOT_STRUCT(%g1)
        stx     %g0, [%g1 + CONFIG_HVCTL_OBUF + 0]
        stx     %g0, [%g1 + CONFIG_HVCTL_OBUF + 8]
        stx     %g0, [%g1 + CONFIG_HVCTL_OBUF + 16]
        stx     %g0, [%g1 + CONFIG_HVCTL_OBUF + 24]
        stx     %g0, [%g1 + CONFIG_HVCTL_OBUF + 32]
        stx     %g0, [%g1 + CONFIG_HVCTL_OBUF + 40]
        stx     %g0, [%g1 + CONFIG_HVCTL_OBUF + 48]
        stx     %g0, [%g1 + CONFIG_HVCTL_OBUF + 56]

        wrpr    %g0, 0, %tl
        wrpr    %g0, 0, %gl
        HVCALL(setup_c_environ)
        call    hv_control_pkt
        nop

.try_again:
        CONFIG_STRUCT(%g3)
        add     %g3, CONFIG_HVCTL_OBUF, %g2
        ldx     [%g3 + CONFIG_HVCTL_LDC], %g1

        add     %g3, CONFIG_HVCTL_LDC_LOCK, %g7
        SPINLOCK_ENTER(%g7, %g4, %g5)

        ! call hv_ldc_send_pkt(hvldc_idx, bufptr)
        HVCALL(hv_ldc_send_pkt)

        CONFIG_STRUCT(%g3)
        add     %g3, CONFIG_HVCTL_LDC_LOCK, %g7
        SPINLOCK_EXIT(%g7)

        ! Busy wait if can't deliver ...
        ! FIXME: need a send queue instead.
        cmp     %g1, EWOULDBLOCK
        be,pn   %xcc, .try_again
        cmp     %g1, ETOOMANY
        be,pn   %xcc, .try_again
         nop

        HVCALL(vcpu_state_restore)

        STRAND_POP(%g7, %g2)

        HVRET
        SET_SIZE(hvctl_svc_callback)