usr/src/psm/promif/ieee1275/common/prom_2path.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, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1991-1994,1998,2002 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <sys/promif.h>
  30 #include <sys/promimpl.h>
  31
  32 static int token2path(char *svc, uint_t token, char *buf, uint_t len);
  33
  34 int
  35 prom_ihandle_to_path(ihandle_t instance, char *buf, uint_t len)
  36 {
  37         return (token2path("instance-to-path", (uint_t)instance, buf, len));
  38 }
  39
  40 int
  41 prom_phandle_to_path(phandle_t package, char *buf, uint_t len)
  42 {
  43         return (token2path("package-to-path", (uint_t)package, buf, len));
  44 }
  45
  46 static int
  47 token2path(char *service, uint_t token, char *buf, uint_t len)
  48 {
  49         cell_t ci[7];
  50         int rv;
  51 #ifdef PROM_32BIT_ADDRS
  52         char *obuf = NULL;
  53
  54         if ((uintptr_t)buf > (uint32_t)-1) {
  55                 obuf = buf;
  56                 buf = promplat_alloc(len);
  57                 if (buf == NULL) {
  58                         return (-1);
  59                 }
  60         }
  61 #endif
  62
  63         promif_preprom();
  64
  65         ci[0] = p1275_ptr2cell(service);        /* Service name */
  66         ci[1] = 3;                              /* #argument cells */
  67         ci[2] = 1;                              /* #return cells */
  68         ci[3] = p1275_uint2cell(token);         /* Arg1: ihandle/phandle */
  69         ci[4] = p1275_ptr2cell(buf);            /* Arg2: Result buffer */
  70         ci[5] = p1275_uint2cell(len);           /* Arg3: Buffer len */
  71         rv = p1275_cif_handler(&ci);
  72
  73         promif_postprom();
  74
  75 #ifdef PROM_32BIT_ADDRS
  76         if (obuf != NULL) {
  77                 promplat_bcopy(buf, obuf, len);
  78                 promplat_free(buf, len);
  79         }
  80 #endif
  81
  82         if (rv != 0)
  83                 return (-1);
  84         return (p1275_cell2int(ci[6]));         /* Res1: Actual length */
  85 }