OpenSolaris_b135/psm/promif/ieee1275/sun4v/prom_sun4v_api_version.c

/*
 * 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]));
}