usr/src/psm/promif/ieee1275/sun4v/prom_sun4v_api_version.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #pragma ident   "%Z%%M% %I%     %E% SMI"
  27
  28 #include <sys/promif.h>
  29 #include <sys/promimpl.h>
  30 #include <sys/hypervisor_api.h>
  31
  32 /*
  33  * This interface allows the client to negotiate a major/minor
  34  * version number for the specified sun4v API group.
  35  */
  36 uint64_t
  37 prom_set_sun4v_api_version(uint64_t api_group, uint64_t major, uint64_t minor,
  38         uint64_t *supported_minor)
  39 {
  40         cell_t ci[8];
  41
  42         if (prom_test("SUNW,set-sun4v-api-version") != 0)
  43                 return (H_EBADTRAP);
  44
  45         ci[0] = p1275_ptr2cell("SUNW,set-sun4v-api-version");   /* Service */
  46         ci[1] = (cell_t)3;                      /* #argument cells */
  47         ci[2] = (cell_t)2;                      /* #result cells */
  48         ci[3] = (cell_t)api_group;              /* Arg1: api_group */
  49         ci[4] = (cell_t)major;                  /* Arg2: major */
  50         ci[5] = (cell_t)minor;                  /* Arg3: minor */
  51         ci[6] = (cell_t)-1;                     /* Res1: status */
  52         ci[7] = (cell_t)-1;                     /* Res2: Supported minor */
  53
  54         promif_preprom();
  55         (void) p1275_cif_handler(&ci);
  56         promif_postprom();
  57
  58         *supported_minor = (uint64_t)(ci[7]);
  59         return ((uint64_t)(ci[6]));
  60 }
  61
  62 /*
  63  * This interface allows the client to get the currently negotiated
  64  * major/minor version number associated with the specified sun4v
  65  * API group.
  66  */
  67 uint64_t
  68 prom_get_sun4v_api_version(uint64_t api_group, uint64_t *major, uint64_t *minor)
  69 {
  70         cell_t ci[7];
  71
  72         if (prom_test("SUNW,get-sun4v-api-version") != 0)
  73                 return (H_EBADTRAP);
  74
  75         ci[0] = p1275_ptr2cell("SUNW,get-sun4v-api-version");   /* Service */
  76         ci[1] = (cell_t)1;                      /* #argument cells */
  77         ci[2] = (cell_t)3;                      /* #result cells */
  78         ci[3] = (cell_t)api_group;              /* Arg1: api_group */
  79         ci[4] = (cell_t)-1;                     /* Res1: status */
  80         ci[5] = (cell_t)-1;                     /* Res2: major number */
  81         ci[6] = (cell_t)-1;                     /* Res3: minor number */
  82
  83         promif_preprom();
  84         (void) p1275_cif_handler(&ci);
  85         promif_postprom();
  86
  87         *major = (uint64_t)(ci[5]);
  88         *minor = (uint64_t)(ci[6]);
  89         return ((uint64_t)(ci[4]));
  90 }