/*
 * 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 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

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

#include <sys/promif.h>
#include <sys/promimpl.h>
#include <sys/hypervisor_api.h>

/*
 * This interface allows the client to negotiate a major/minor
 * version number for the specified sun4v API group.
 */
uint64_t
prom_set_sun4v_api_version(uint64_t api_group, uint64_t major, uint64_t minor,
        uint64_t *supported_minor)
{
        cell_t ci[8];

        if (prom_test("SUNW,set-sun4v-api-version") != 0)
                return (H_EBADTRAP);

        ci[0] = p1275_ptr2cell("SUNW,set-sun4v-api-version");   /* Service */
        ci[1] = (cell_t)3;                      /* #argument cells */
        ci[2] = (cell_t)2;                      /* #result cells */
        ci[3] = (cell_t)api_group;              /* Arg1: api_group */
        ci[4] = (cell_t)major;                  /* Arg2: major */
        ci[5] = (cell_t)minor;                  /* Arg3: minor */
        ci[6] = (cell_t)-1;                     /* Res1: status */
        ci[7] = (cell_t)-1;                     /* Res2: Supported minor */

        promif_preprom();
        (void) p1275_cif_handler(&ci);
        promif_postprom();

        *supported_minor = (uint64_t)(ci[7]);
        return ((uint64_t)(ci[6]));
}

/*
 * This interface allows the client to get the currently negotiated
 * major/minor version number associated with the specified sun4v
 * API group.
 */
uint64_t
prom_get_sun4v_api_version(uint64_t api_group, uint64_t *major, uint64_t *minor)
{
        cell_t ci[7];

        if (prom_test("SUNW,get-sun4v-api-version") != 0)
                return (H_EBADTRAP);

        ci[0] = p1275_ptr2cell("SUNW,get-sun4v-api-version");   /* Service */
        ci[1] = (cell_t)1;                      /* #argument cells */
        ci[2] = (cell_t)3;                      /* #result cells */
        ci[3] = (cell_t)api_group;              /* Arg1: api_group */
        ci[4] = (cell_t)-1;                     /* Res1: status */
        ci[5] = (cell_t)-1;                     /* Res2: major number */
        ci[6] = (cell_t)-1;                     /* Res3: minor number */

        promif_preprom();
        (void) p1275_cif_handler(&ci);
        promif_postprom();

        *major = (uint64_t)(ci[5]);
        *minor = (uint64_t)(ci[6]);
        return ((uint64_t)(ci[4]));
}