prom_2path.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 1991-1994,1998,2002 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>
static int token2path(char *svc, uint_t token, char *buf, uint_t len);
int
prom_ihandle_to_path(ihandle_t instance, char *buf, uint_t len)
{
return (token2path("instance-to-path", (uint_t)instance, buf, len));
}
int
prom_phandle_to_path(phandle_t package, char *buf, uint_t len)
{
return (token2path("package-to-path", (uint_t)package, buf, len));
}
static int
token2path(char *service, uint_t token, char *buf, uint_t len)
{
cell_t ci[7];
int rv;
#ifdef PROM_32BIT_ADDRS
char *obuf = NULL;
if ((uintptr_t)buf > (uint32_t)-1) {
obuf = buf;
buf = promplat_alloc(len);
if (buf == NULL) {
return (-1);
}
}
#endif
promif_preprom();
ci[0] = p1275_ptr2cell(service); /* Service name */
ci[1] = 3; /* #argument cells */
ci[2] = 1; /* #return cells */
ci[3] = p1275_uint2cell(token); /* Arg1: ihandle/phandle */
ci[4] = p1275_ptr2cell(buf); /* Arg2: Result buffer */
ci[5] = p1275_uint2cell(len); /* Arg3: Buffer len */
rv = p1275_cif_handler(&ci);
promif_postprom();
#ifdef PROM_32BIT_ADDRS
if (obuf != NULL) {
promplat_bcopy(buf, obuf, len);
promplat_free(buf, len);
}
#endif
if (rv != 0)
return (-1);
return (p1275_cell2int(ci[6])); /* Res1: Actual length */
}