17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * CDDL HEADER START
37c478bd9Sstevel@tonic-gate *
47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*3b133becSGangadhar Mylapuram * Common Development and Distribution License (the "License").
6*3b133becSGangadhar Mylapuram * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate *
87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate * and limitations under the License.
127c478bd9Sstevel@tonic-gate *
137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate *
197c478bd9Sstevel@tonic-gate * CDDL HEADER END
207c478bd9Sstevel@tonic-gate */
217c478bd9Sstevel@tonic-gate /*
22*3b133becSGangadhar Mylapuram * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
237c478bd9Sstevel@tonic-gate * Use is subject to license terms.
247c478bd9Sstevel@tonic-gate */
257c478bd9Sstevel@tonic-gate
267c478bd9Sstevel@tonic-gate
277c478bd9Sstevel@tonic-gate #include "benv.h"
287c478bd9Sstevel@tonic-gate #include <sys/sunddi.h>
297c478bd9Sstevel@tonic-gate #include <sys/ddi_impldefs.h>
307c478bd9Sstevel@tonic-gate #include <sys/openpromio.h>
317c478bd9Sstevel@tonic-gate #include <stdio.h>
327c478bd9Sstevel@tonic-gate
337c478bd9Sstevel@tonic-gate static int getpropval(struct openpromio *opp, char *prop);
347c478bd9Sstevel@tonic-gate
357c478bd9Sstevel@tonic-gate static char *promdev = "/dev/openprom";
367c478bd9Sstevel@tonic-gate static int prom_fd;
377c478bd9Sstevel@tonic-gate static char *mfail = "malloc";
387c478bd9Sstevel@tonic-gate
397c478bd9Sstevel@tonic-gate /*
407c478bd9Sstevel@tonic-gate * 128 is the size of the largest (currently) property name
417c478bd9Sstevel@tonic-gate * 16384 - MAXPROPSIZE - sizeof (int) is the size of the largest
427c478bd9Sstevel@tonic-gate * (currently) property value that is allowed.
437c478bd9Sstevel@tonic-gate * the sizeof (u_int) is from struct openpromio
447c478bd9Sstevel@tonic-gate */
457c478bd9Sstevel@tonic-gate
467c478bd9Sstevel@tonic-gate #define MAXPROPSIZE 128
477c478bd9Sstevel@tonic-gate #define MAXVALSIZE (16384 - MAXPROPSIZE - sizeof (u_int))
487c478bd9Sstevel@tonic-gate #define BUFSIZE (MAXPROPSIZE + MAXVALSIZE + sizeof (u_int))
497c478bd9Sstevel@tonic-gate #define MINVALSIZE (4 * sizeof (u_long))
507c478bd9Sstevel@tonic-gate #define MINBUFSIZE (MINVALSIZE + sizeof (u_long))
517c478bd9Sstevel@tonic-gate
527c478bd9Sstevel@tonic-gate typedef union {
537c478bd9Sstevel@tonic-gate char buf[BUFSIZE];
547c478bd9Sstevel@tonic-gate struct openpromio opp;
557c478bd9Sstevel@tonic-gate } Oppbuf;
567c478bd9Sstevel@tonic-gate
577c478bd9Sstevel@tonic-gate typedef union {
587c478bd9Sstevel@tonic-gate char buf[MINVALSIZE + sizeof (u_int)];
597c478bd9Sstevel@tonic-gate struct openpromio opp;
607c478bd9Sstevel@tonic-gate } Oppbuf_small;
617c478bd9Sstevel@tonic-gate
627c478bd9Sstevel@tonic-gate static Oppbuf oppbuf;
637c478bd9Sstevel@tonic-gate
647c478bd9Sstevel@tonic-gate static unsigned long
next(unsigned long id)657c478bd9Sstevel@tonic-gate next(unsigned long id)
667c478bd9Sstevel@tonic-gate {
677c478bd9Sstevel@tonic-gate Oppbuf_small oppbuf;
687c478bd9Sstevel@tonic-gate struct openpromio *opp = &(oppbuf.opp);
697c478bd9Sstevel@tonic-gate unsigned long *ip = (unsigned long *)(opp->oprom_array);
707c478bd9Sstevel@tonic-gate
717c478bd9Sstevel@tonic-gate memset(oppbuf.buf, 0, MINBUFSIZE);
727c478bd9Sstevel@tonic-gate opp->oprom_size = MINVALSIZE;
737c478bd9Sstevel@tonic-gate *ip = id;
747c478bd9Sstevel@tonic-gate if (ioctl(prom_fd, OPROMNEXT, opp) < 0)
757c478bd9Sstevel@tonic-gate return (0);
767c478bd9Sstevel@tonic-gate return (*(unsigned long *)opp->oprom_array);
777c478bd9Sstevel@tonic-gate }
787c478bd9Sstevel@tonic-gate
797c478bd9Sstevel@tonic-gate static unsigned long
child(unsigned long id)807c478bd9Sstevel@tonic-gate child(unsigned long id)
817c478bd9Sstevel@tonic-gate {
827c478bd9Sstevel@tonic-gate Oppbuf_small oppbuf;
837c478bd9Sstevel@tonic-gate struct openpromio *opp = &(oppbuf.opp);
847c478bd9Sstevel@tonic-gate unsigned long *ip = (unsigned long *)(opp->oprom_array);
857c478bd9Sstevel@tonic-gate
867c478bd9Sstevel@tonic-gate memset(oppbuf.buf, 0, MINBUFSIZE);
877c478bd9Sstevel@tonic-gate opp->oprom_size = MINVALSIZE;
887c478bd9Sstevel@tonic-gate *ip = id;
897c478bd9Sstevel@tonic-gate if (ioctl(prom_fd, OPROMCHILD, opp) < 0)
907c478bd9Sstevel@tonic-gate return (0);
917c478bd9Sstevel@tonic-gate return (*(unsigned long *)opp->oprom_array);
927c478bd9Sstevel@tonic-gate }
937c478bd9Sstevel@tonic-gate
947c478bd9Sstevel@tonic-gate /*
957c478bd9Sstevel@tonic-gate * Find a node by name from the prom device tree.
967c478bd9Sstevel@tonic-gate * Return the id or 0 if it is not found.
977c478bd9Sstevel@tonic-gate */
987c478bd9Sstevel@tonic-gate static unsigned long
prom_findnode_byname(unsigned long id,char * name)997c478bd9Sstevel@tonic-gate prom_findnode_byname(unsigned long id, char *name)
1007c478bd9Sstevel@tonic-gate {
1017c478bd9Sstevel@tonic-gate struct openpromio *opp = &(oppbuf.opp);
1027c478bd9Sstevel@tonic-gate unsigned long nid;
1037c478bd9Sstevel@tonic-gate
1047c478bd9Sstevel@tonic-gate if (id == 0)
1057c478bd9Sstevel@tonic-gate return (0);
1067c478bd9Sstevel@tonic-gate if (!getpropval(opp, "name"))
1077c478bd9Sstevel@tonic-gate return (0);
1087c478bd9Sstevel@tonic-gate if (strcmp(opp->oprom_array, name) == 0)
1097c478bd9Sstevel@tonic-gate return (id);
1107c478bd9Sstevel@tonic-gate if (nid = prom_findnode_byname(child(id), name))
1117c478bd9Sstevel@tonic-gate return (nid);
1127c478bd9Sstevel@tonic-gate if (nid = prom_findnode_byname(next(id), name))
1137c478bd9Sstevel@tonic-gate return (nid);
1147c478bd9Sstevel@tonic-gate return (0);
1157c478bd9Sstevel@tonic-gate }
1167c478bd9Sstevel@tonic-gate
1177c478bd9Sstevel@tonic-gate /*
1187c478bd9Sstevel@tonic-gate * Make the current prom node be the rootnode and return its id.
1197c478bd9Sstevel@tonic-gate */
1207c478bd9Sstevel@tonic-gate static unsigned long
prom_rootnode()1217c478bd9Sstevel@tonic-gate prom_rootnode()
1227c478bd9Sstevel@tonic-gate {
1237c478bd9Sstevel@tonic-gate return (next(0));
1247c478bd9Sstevel@tonic-gate }
1257c478bd9Sstevel@tonic-gate
1267c478bd9Sstevel@tonic-gate static int
getpropval(struct openpromio * opp,char * prop)1277c478bd9Sstevel@tonic-gate getpropval(struct openpromio *opp, char *prop)
1287c478bd9Sstevel@tonic-gate {
1297c478bd9Sstevel@tonic-gate opp->oprom_size = MAXVALSIZE;
1307c478bd9Sstevel@tonic-gate
1317c478bd9Sstevel@tonic-gate (void) strlcpy(opp->oprom_array, prop, MAXPROPSIZE);
1327c478bd9Sstevel@tonic-gate if (ioctl(prom_fd, OPROMGETPROP, opp) < 0)
1337c478bd9Sstevel@tonic-gate return (0);
1347c478bd9Sstevel@tonic-gate if (opp->oprom_size == 0)
1357c478bd9Sstevel@tonic-gate return (0);
1367c478bd9Sstevel@tonic-gate return (1);
1377c478bd9Sstevel@tonic-gate }
1387c478bd9Sstevel@tonic-gate
1397c478bd9Sstevel@tonic-gate static int
getnextprop(struct openpromio * opp,char * prop)1407c478bd9Sstevel@tonic-gate getnextprop(struct openpromio *opp, char *prop)
1417c478bd9Sstevel@tonic-gate {
1427c478bd9Sstevel@tonic-gate opp->oprom_size = MAXVALSIZE;
1437c478bd9Sstevel@tonic-gate
1447c478bd9Sstevel@tonic-gate (void) strlcpy(opp->oprom_array, prop, MAXPROPSIZE);
1457c478bd9Sstevel@tonic-gate if (ioctl(prom_fd, OPROMNXTPROP, opp) < 0)
1467c478bd9Sstevel@tonic-gate return (0);
1477c478bd9Sstevel@tonic-gate if (opp->oprom_size == 0)
1487c478bd9Sstevel@tonic-gate return (0);
1497c478bd9Sstevel@tonic-gate return (1);
1507c478bd9Sstevel@tonic-gate }
1517c478bd9Sstevel@tonic-gate
152*3b133becSGangadhar Mylapuram char *
getbootcmd(void)153*3b133becSGangadhar Mylapuram getbootcmd(void)
154*3b133becSGangadhar Mylapuram {
155*3b133becSGangadhar Mylapuram struct openpromio *opp = &(oppbuf.opp);
156*3b133becSGangadhar Mylapuram opp->oprom_size = MAXVALSIZE;
157*3b133becSGangadhar Mylapuram if (ioctl(prom_fd, OPROMGETBOOTPATH, opp) < 0)
158*3b133becSGangadhar Mylapuram return (NULL);
159*3b133becSGangadhar Mylapuram return (opp->oprom_array);
160*3b133becSGangadhar Mylapuram }
161*3b133becSGangadhar Mylapuram
1627c478bd9Sstevel@tonic-gate /*
1637c478bd9Sstevel@tonic-gate * Get a pointer to the requested property from the current node.
1647c478bd9Sstevel@tonic-gate * The property is stored in static storage and the returned pointer
1657c478bd9Sstevel@tonic-gate * points into the static storage. The property length is placed in
1667c478bd9Sstevel@tonic-gate * the location pointed to by the third argument.
1677c478bd9Sstevel@tonic-gate */
1687c478bd9Sstevel@tonic-gate static unsigned char *
prom_getprop(char * prop,int * lenp)1697c478bd9Sstevel@tonic-gate prom_getprop(char *prop, int *lenp)
1707c478bd9Sstevel@tonic-gate {
1717c478bd9Sstevel@tonic-gate struct openpromio *opp = &(oppbuf.opp);
1727c478bd9Sstevel@tonic-gate
1737c478bd9Sstevel@tonic-gate if (!getpropval(opp, prop))
1747c478bd9Sstevel@tonic-gate return (NULL);
1757c478bd9Sstevel@tonic-gate *lenp = opp->oprom_size;
1767c478bd9Sstevel@tonic-gate return ((unsigned char *)opp->oprom_array);
1777c478bd9Sstevel@tonic-gate }
1787c478bd9Sstevel@tonic-gate
1797c478bd9Sstevel@tonic-gate static unsigned char *
prom_nextprop(char * prop)1807c478bd9Sstevel@tonic-gate prom_nextprop(char *prop)
1817c478bd9Sstevel@tonic-gate {
1827c478bd9Sstevel@tonic-gate struct openpromio *opp = &(oppbuf.opp);
1837c478bd9Sstevel@tonic-gate
1847c478bd9Sstevel@tonic-gate if (!getnextprop(opp, prop))
1857c478bd9Sstevel@tonic-gate return ((unsigned char *)0);
1867c478bd9Sstevel@tonic-gate return ((unsigned char *)opp->oprom_array);
1877c478bd9Sstevel@tonic-gate }
1887c478bd9Sstevel@tonic-gate
1897c478bd9Sstevel@tonic-gate ddi_prop_t *
get_proplist(char * name)1907c478bd9Sstevel@tonic-gate get_proplist(char *name)
1917c478bd9Sstevel@tonic-gate {
1927c478bd9Sstevel@tonic-gate ddi_prop_t *plist, *npp, *plast;
1937c478bd9Sstevel@tonic-gate char *curprop, *newprop;
1947c478bd9Sstevel@tonic-gate unsigned char *propval;
1957c478bd9Sstevel@tonic-gate unsigned long id;
1967c478bd9Sstevel@tonic-gate
1977c478bd9Sstevel@tonic-gate plist = NULL;
1987c478bd9Sstevel@tonic-gate plast = NULL;
1997c478bd9Sstevel@tonic-gate id = prom_findnode_byname(prom_rootnode(), name);
2007c478bd9Sstevel@tonic-gate if (id == 0)
2017c478bd9Sstevel@tonic-gate return (plist);
2027c478bd9Sstevel@tonic-gate curprop = "";
2037c478bd9Sstevel@tonic-gate while (newprop = (char *)prom_nextprop(curprop)) {
2047c478bd9Sstevel@tonic-gate curprop = strdup(newprop);
2057c478bd9Sstevel@tonic-gate npp = (ddi_prop_t *)malloc(sizeof (ddi_prop_t));
2067c478bd9Sstevel@tonic-gate if (npp == 0)
2077c478bd9Sstevel@tonic-gate exit(_error(PERROR, mfail));
2087c478bd9Sstevel@tonic-gate propval = prom_getprop(curprop, &npp->prop_len);
2097c478bd9Sstevel@tonic-gate npp->prop_name = curprop;
2107c478bd9Sstevel@tonic-gate if (propval != NULL) {
2117c478bd9Sstevel@tonic-gate npp->prop_val = (char *)malloc(npp->prop_len);
2127c478bd9Sstevel@tonic-gate if (npp->prop_val == 0)
2137c478bd9Sstevel@tonic-gate exit(_error(PERROR, mfail));
2147c478bd9Sstevel@tonic-gate memcpy(npp->prop_val, propval, npp->prop_len);
2157c478bd9Sstevel@tonic-gate } else
2167c478bd9Sstevel@tonic-gate npp->prop_val = NULL;
2177c478bd9Sstevel@tonic-gate npp->prop_next = NULL;
2187c478bd9Sstevel@tonic-gate if (plast == NULL) {
2197c478bd9Sstevel@tonic-gate plist = npp;
2207c478bd9Sstevel@tonic-gate } else {
2217c478bd9Sstevel@tonic-gate plast->prop_next = npp;
2227c478bd9Sstevel@tonic-gate }
2237c478bd9Sstevel@tonic-gate plast = npp;
2247c478bd9Sstevel@tonic-gate }
2257c478bd9Sstevel@tonic-gate return (plist);
2267c478bd9Sstevel@tonic-gate }
2277c478bd9Sstevel@tonic-gate
2287c478bd9Sstevel@tonic-gate caddr_t
get_propval(char * name,char * node)2297c478bd9Sstevel@tonic-gate get_propval(char *name, char *node)
2307c478bd9Sstevel@tonic-gate {
2317c478bd9Sstevel@tonic-gate ddi_prop_t *prop, *plist;
2327c478bd9Sstevel@tonic-gate
2337c478bd9Sstevel@tonic-gate if ((plist = get_proplist(node)) == NULL)
2347c478bd9Sstevel@tonic-gate return (NULL);
2357c478bd9Sstevel@tonic-gate
2367c478bd9Sstevel@tonic-gate for (prop = plist; prop != NULL; prop = prop->prop_next)
2377c478bd9Sstevel@tonic-gate if (strcmp(prop->prop_name, name) == 0)
2387c478bd9Sstevel@tonic-gate return (prop->prop_val);
2397c478bd9Sstevel@tonic-gate
2407c478bd9Sstevel@tonic-gate return (NULL);
2417c478bd9Sstevel@tonic-gate }
2427c478bd9Sstevel@tonic-gate
2437c478bd9Sstevel@tonic-gate void
get_kbenv(void)2447c478bd9Sstevel@tonic-gate get_kbenv(void)
2457c478bd9Sstevel@tonic-gate {
2467c478bd9Sstevel@tonic-gate if ((prom_fd = open(promdev, O_RDONLY)) < 0) {
2477c478bd9Sstevel@tonic-gate exit(_error(PERROR, "prom open failed"));
2487c478bd9Sstevel@tonic-gate }
2497c478bd9Sstevel@tonic-gate }
2507c478bd9Sstevel@tonic-gate
2517c478bd9Sstevel@tonic-gate void
close_kbenv(void)2527c478bd9Sstevel@tonic-gate close_kbenv(void)
2537c478bd9Sstevel@tonic-gate {
2547c478bd9Sstevel@tonic-gate (void) close(prom_fd);
2557c478bd9Sstevel@tonic-gate }
256