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
57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
77c478bd9Sstevel@tonic-gate * with the License.
87c478bd9Sstevel@tonic-gate *
97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
127c478bd9Sstevel@tonic-gate * and limitations under the License.
137c478bd9Sstevel@tonic-gate *
147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
197c478bd9Sstevel@tonic-gate *
207c478bd9Sstevel@tonic-gate * CDDL HEADER END
217c478bd9Sstevel@tonic-gate */
227c478bd9Sstevel@tonic-gate /*
2353391bafSeota * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
247c478bd9Sstevel@tonic-gate * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate */
267c478bd9Sstevel@tonic-gate
277c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
287c478bd9Sstevel@tonic-gate
297c478bd9Sstevel@tonic-gate #include <sys/promif.h>
307c478bd9Sstevel@tonic-gate #include <sys/promimpl.h>
317c478bd9Sstevel@tonic-gate
327c478bd9Sstevel@tonic-gate /*
337c478bd9Sstevel@tonic-gate * Routines for walking the PROMs devinfo tree
347c478bd9Sstevel@tonic-gate */
35*fa9e4066Sahrens pnode_t
prom_nextnode(pnode_t nodeid)36*fa9e4066Sahrens prom_nextnode(pnode_t nodeid)
377c478bd9Sstevel@tonic-gate {
387c478bd9Sstevel@tonic-gate cell_t ci[5];
397c478bd9Sstevel@tonic-gate
407c478bd9Sstevel@tonic-gate ci[0] = p1275_ptr2cell("peer"); /* Service name */
417c478bd9Sstevel@tonic-gate ci[1] = (cell_t)1; /* #argument cells */
427c478bd9Sstevel@tonic-gate ci[2] = (cell_t)1; /* #result cells */
437c478bd9Sstevel@tonic-gate ci[3] = p1275_dnode2cell(nodeid); /* Arg1: input phandle */
447c478bd9Sstevel@tonic-gate ci[4] = p1275_dnode2cell(OBP_NONODE); /* Res1: Prime result */
457c478bd9Sstevel@tonic-gate
467c478bd9Sstevel@tonic-gate promif_preprom();
477c478bd9Sstevel@tonic-gate (void) p1275_cif_handler(&ci);
487c478bd9Sstevel@tonic-gate promif_postprom();
497c478bd9Sstevel@tonic-gate
507c478bd9Sstevel@tonic-gate return (p1275_cell2dnode(ci[4])); /* Res1: peer phandle */
517c478bd9Sstevel@tonic-gate }
527c478bd9Sstevel@tonic-gate
53*fa9e4066Sahrens pnode_t
prom_childnode(pnode_t nodeid)54*fa9e4066Sahrens prom_childnode(pnode_t nodeid)
557c478bd9Sstevel@tonic-gate {
567c478bd9Sstevel@tonic-gate cell_t ci[5];
577c478bd9Sstevel@tonic-gate
587c478bd9Sstevel@tonic-gate ci[0] = p1275_ptr2cell("child"); /* Service name */
597c478bd9Sstevel@tonic-gate ci[1] = (cell_t)1; /* #argument cells */
607c478bd9Sstevel@tonic-gate ci[2] = (cell_t)1; /* #result cells */
617c478bd9Sstevel@tonic-gate ci[3] = p1275_dnode2cell(nodeid); /* Arg1: input phandle */
627c478bd9Sstevel@tonic-gate ci[4] = p1275_dnode2cell(OBP_NONODE); /* Res1: Prime result */
637c478bd9Sstevel@tonic-gate
647c478bd9Sstevel@tonic-gate promif_preprom();
657c478bd9Sstevel@tonic-gate (void) p1275_cif_handler(&ci);
667c478bd9Sstevel@tonic-gate promif_postprom();
677c478bd9Sstevel@tonic-gate
687c478bd9Sstevel@tonic-gate return (p1275_cell2dnode(ci[4])); /* Res1: child phandle */
697c478bd9Sstevel@tonic-gate }
707c478bd9Sstevel@tonic-gate
717c478bd9Sstevel@tonic-gate /*
727c478bd9Sstevel@tonic-gate * prom_walk_devs() implements a generic walker for the OBP tree; this
737c478bd9Sstevel@tonic-gate * implementation uses an explicitly managed stack in order to save the
747c478bd9Sstevel@tonic-gate * overhead of a recursive implementation.
757c478bd9Sstevel@tonic-gate */
767c478bd9Sstevel@tonic-gate void
prom_walk_devs(pnode_t node,int (* cb)(pnode_t,void *,void *),void * arg,void * result)77*fa9e4066Sahrens prom_walk_devs(pnode_t node, int (*cb)(pnode_t, void *, void *), void *arg,
787c478bd9Sstevel@tonic-gate void *result)
797c478bd9Sstevel@tonic-gate {
80*fa9e4066Sahrens pnode_t stack[OBP_STACKDEPTH];
817c478bd9Sstevel@tonic-gate int stackidx = 0;
827c478bd9Sstevel@tonic-gate
837c478bd9Sstevel@tonic-gate if (node == OBP_NONODE || node == OBP_BADNODE) {
847c478bd9Sstevel@tonic-gate prom_panic("Invalid node specified as root of prom tree walk");
857c478bd9Sstevel@tonic-gate }
867c478bd9Sstevel@tonic-gate
877c478bd9Sstevel@tonic-gate stack[0] = node;
887c478bd9Sstevel@tonic-gate
897c478bd9Sstevel@tonic-gate for (;;) {
90*fa9e4066Sahrens pnode_t curnode = stack[stackidx];
91*fa9e4066Sahrens pnode_t child;
927c478bd9Sstevel@tonic-gate
937c478bd9Sstevel@tonic-gate /*
947c478bd9Sstevel@tonic-gate * We're out of stuff to do at this level, bump back up a level
957c478bd9Sstevel@tonic-gate * in the tree, and move to the next node; if the new level
967c478bd9Sstevel@tonic-gate * will be level -1, we're done.
977c478bd9Sstevel@tonic-gate */
987c478bd9Sstevel@tonic-gate if (curnode == OBP_NONODE || curnode == OBP_BADNODE) {
997c478bd9Sstevel@tonic-gate stackidx--;
1007c478bd9Sstevel@tonic-gate
1017c478bd9Sstevel@tonic-gate if (stackidx < 0)
1027c478bd9Sstevel@tonic-gate return;
1037c478bd9Sstevel@tonic-gate
1047c478bd9Sstevel@tonic-gate stack[stackidx] = prom_nextnode(stack[stackidx]);
1057c478bd9Sstevel@tonic-gate continue;
1067c478bd9Sstevel@tonic-gate }
1077c478bd9Sstevel@tonic-gate
1087c478bd9Sstevel@tonic-gate switch ((*cb)(curnode, arg, result)) {
1097c478bd9Sstevel@tonic-gate
1107c478bd9Sstevel@tonic-gate case PROM_WALK_TERMINATE:
1117c478bd9Sstevel@tonic-gate return;
1127c478bd9Sstevel@tonic-gate
1137c478bd9Sstevel@tonic-gate case PROM_WALK_CONTINUE:
1147c478bd9Sstevel@tonic-gate /*
1157c478bd9Sstevel@tonic-gate * If curnode has a child, traverse to it,
1167c478bd9Sstevel@tonic-gate * otherwise move to curnode's sibling.
1177c478bd9Sstevel@tonic-gate */
1187c478bd9Sstevel@tonic-gate child = prom_childnode(curnode);
1197c478bd9Sstevel@tonic-gate if (child != OBP_NONODE && child != OBP_BADNODE) {
1207c478bd9Sstevel@tonic-gate stackidx++;
1217c478bd9Sstevel@tonic-gate stack[stackidx] = child;
1227c478bd9Sstevel@tonic-gate } else {
1237c478bd9Sstevel@tonic-gate stack[stackidx] =
1247c478bd9Sstevel@tonic-gate prom_nextnode(stack[stackidx]);
1257c478bd9Sstevel@tonic-gate }
1267c478bd9Sstevel@tonic-gate break;
1277c478bd9Sstevel@tonic-gate
1287c478bd9Sstevel@tonic-gate default:
1297c478bd9Sstevel@tonic-gate prom_panic("unrecognized walk directive");
1307c478bd9Sstevel@tonic-gate }
1317c478bd9Sstevel@tonic-gate }
1327c478bd9Sstevel@tonic-gate }
1337c478bd9Sstevel@tonic-gate
1347c478bd9Sstevel@tonic-gate /*
1357c478bd9Sstevel@tonic-gate * prom_findnode_bydevtype() searches the prom device subtree rooted at 'node'
1367c478bd9Sstevel@tonic-gate * and returns the first node whose device type property matches the type
1377c478bd9Sstevel@tonic-gate * supplied in 'devtype'.
1387c478bd9Sstevel@tonic-gate */
1397c478bd9Sstevel@tonic-gate static int
bytype_cb(pnode_t node,void * arg,void * result)140*fa9e4066Sahrens bytype_cb(pnode_t node, void *arg, void *result)
1417c478bd9Sstevel@tonic-gate {
1427c478bd9Sstevel@tonic-gate if (prom_devicetype(node, (char *)arg)) {
143*fa9e4066Sahrens *((pnode_t *)result) = node;
1447c478bd9Sstevel@tonic-gate return (PROM_WALK_TERMINATE);
1457c478bd9Sstevel@tonic-gate }
1467c478bd9Sstevel@tonic-gate return (PROM_WALK_CONTINUE);
1477c478bd9Sstevel@tonic-gate }
1487c478bd9Sstevel@tonic-gate
149*fa9e4066Sahrens pnode_t
prom_findnode_bydevtype(pnode_t node,char * devtype)150*fa9e4066Sahrens prom_findnode_bydevtype(pnode_t node, char *devtype)
1517c478bd9Sstevel@tonic-gate {
152*fa9e4066Sahrens pnode_t result = OBP_NONODE;
1537c478bd9Sstevel@tonic-gate prom_walk_devs(node, bytype_cb, devtype, &result);
1547c478bd9Sstevel@tonic-gate return (result);
1557c478bd9Sstevel@tonic-gate }
1567c478bd9Sstevel@tonic-gate
1577c478bd9Sstevel@tonic-gate
1587c478bd9Sstevel@tonic-gate /*
1597c478bd9Sstevel@tonic-gate * prom_findnode_byname() searches the prom device subtree rooted at 'node' and
1607c478bd9Sstevel@tonic-gate * returns the first node whose name matches the name supplied in 'name'.
1617c478bd9Sstevel@tonic-gate */
1627c478bd9Sstevel@tonic-gate static int
byname_cb(pnode_t node,void * arg,void * result)163*fa9e4066Sahrens byname_cb(pnode_t node, void *arg, void *result)
1647c478bd9Sstevel@tonic-gate {
1657c478bd9Sstevel@tonic-gate if (prom_getnode_byname(node, (char *)arg)) {
166*fa9e4066Sahrens *((pnode_t *)result) = node;
1677c478bd9Sstevel@tonic-gate return (PROM_WALK_TERMINATE);
1687c478bd9Sstevel@tonic-gate }
1697c478bd9Sstevel@tonic-gate return (PROM_WALK_CONTINUE);
1707c478bd9Sstevel@tonic-gate }
1717c478bd9Sstevel@tonic-gate
172*fa9e4066Sahrens pnode_t
prom_findnode_byname(pnode_t node,char * name)173*fa9e4066Sahrens prom_findnode_byname(pnode_t node, char *name)
1747c478bd9Sstevel@tonic-gate {
175*fa9e4066Sahrens pnode_t result = OBP_NONODE;
1767c478bd9Sstevel@tonic-gate prom_walk_devs(node, byname_cb, name, &result);
1777c478bd9Sstevel@tonic-gate return (result);
1787c478bd9Sstevel@tonic-gate }
1797c478bd9Sstevel@tonic-gate
1807c478bd9Sstevel@tonic-gate /*
1817c478bd9Sstevel@tonic-gate * Return the root nodeid.
1827c478bd9Sstevel@tonic-gate * Calling prom_nextnode(0) returns the root nodeid.
1837c478bd9Sstevel@tonic-gate */
184*fa9e4066Sahrens pnode_t
prom_rootnode(void)1857c478bd9Sstevel@tonic-gate prom_rootnode(void)
1867c478bd9Sstevel@tonic-gate {
187*fa9e4066Sahrens static pnode_t rootnode;
1887c478bd9Sstevel@tonic-gate
1897c478bd9Sstevel@tonic-gate return (rootnode ? rootnode : (rootnode = prom_nextnode(OBP_NONODE)));
1907c478bd9Sstevel@tonic-gate }
1917c478bd9Sstevel@tonic-gate
192*fa9e4066Sahrens pnode_t
prom_parentnode(pnode_t nodeid)193*fa9e4066Sahrens prom_parentnode(pnode_t nodeid)
1947c478bd9Sstevel@tonic-gate {
1957c478bd9Sstevel@tonic-gate cell_t ci[5];
1967c478bd9Sstevel@tonic-gate
1977c478bd9Sstevel@tonic-gate ci[0] = p1275_ptr2cell("parent"); /* Service name */
1987c478bd9Sstevel@tonic-gate ci[1] = (cell_t)1; /* #argument cells */
1997c478bd9Sstevel@tonic-gate ci[2] = (cell_t)1; /* #result cells */
2007c478bd9Sstevel@tonic-gate ci[3] = p1275_dnode2cell(nodeid); /* Arg1: input phandle */
2017c478bd9Sstevel@tonic-gate ci[4] = p1275_dnode2cell(OBP_NONODE); /* Res1: Prime result */
2027c478bd9Sstevel@tonic-gate
2037c478bd9Sstevel@tonic-gate promif_preprom();
2047c478bd9Sstevel@tonic-gate (void) p1275_cif_handler(&ci);
2057c478bd9Sstevel@tonic-gate promif_postprom();
2067c478bd9Sstevel@tonic-gate
2077c478bd9Sstevel@tonic-gate return (p1275_cell2dnode(ci[4])); /* Res1: parent phandle */
2087c478bd9Sstevel@tonic-gate }
2097c478bd9Sstevel@tonic-gate
210*fa9e4066Sahrens pnode_t
prom_finddevice(char * path)2117c478bd9Sstevel@tonic-gate prom_finddevice(char *path)
2127c478bd9Sstevel@tonic-gate {
2137c478bd9Sstevel@tonic-gate cell_t ci[5];
2147c478bd9Sstevel@tonic-gate #ifdef PROM_32BIT_ADDRS
2157c478bd9Sstevel@tonic-gate char *opath = NULL;
2167c478bd9Sstevel@tonic-gate size_t len;
2177c478bd9Sstevel@tonic-gate
2187c478bd9Sstevel@tonic-gate if ((uintptr_t)path > (uint32_t)-1) {
2197c478bd9Sstevel@tonic-gate opath = path;
2207c478bd9Sstevel@tonic-gate len = prom_strlen(opath) + 1; /* include terminating NUL */
2217c478bd9Sstevel@tonic-gate path = promplat_alloc(len);
2227c478bd9Sstevel@tonic-gate if (path == NULL) {
2237c478bd9Sstevel@tonic-gate return (OBP_BADNODE);
2247c478bd9Sstevel@tonic-gate }
2257c478bd9Sstevel@tonic-gate (void) prom_strcpy(path, opath);
2267c478bd9Sstevel@tonic-gate }
2277c478bd9Sstevel@tonic-gate #endif
2287c478bd9Sstevel@tonic-gate
2297c478bd9Sstevel@tonic-gate promif_preprom();
2307c478bd9Sstevel@tonic-gate
2317c478bd9Sstevel@tonic-gate ci[0] = p1275_ptr2cell("finddevice"); /* Service name */
2327c478bd9Sstevel@tonic-gate ci[1] = (cell_t)1; /* #argument cells */
2337c478bd9Sstevel@tonic-gate ci[2] = (cell_t)1; /* #result cells */
2347c478bd9Sstevel@tonic-gate ci[3] = p1275_ptr2cell(path); /* Arg1: pathname */
2357c478bd9Sstevel@tonic-gate ci[4] = p1275_dnode2cell(OBP_BADNODE); /* Res1: Prime result */
2367c478bd9Sstevel@tonic-gate
2377c478bd9Sstevel@tonic-gate (void) p1275_cif_handler(&ci);
2387c478bd9Sstevel@tonic-gate
2397c478bd9Sstevel@tonic-gate promif_postprom();
2407c478bd9Sstevel@tonic-gate
2417c478bd9Sstevel@tonic-gate #ifdef PROM_32BIT_ADDRS
2427c478bd9Sstevel@tonic-gate if (opath != NULL)
2437c478bd9Sstevel@tonic-gate promplat_free(path, len);
2447c478bd9Sstevel@tonic-gate #endif
2457c478bd9Sstevel@tonic-gate
246*fa9e4066Sahrens return ((pnode_t)p1275_cell2dnode(ci[4])); /* Res1: phandle */
2477c478bd9Sstevel@tonic-gate }
2487c478bd9Sstevel@tonic-gate
249*fa9e4066Sahrens pnode_t
prom_chosennode(void)2507c478bd9Sstevel@tonic-gate prom_chosennode(void)
2517c478bd9Sstevel@tonic-gate {
252*fa9e4066Sahrens static pnode_t chosen;
253*fa9e4066Sahrens pnode_t node;
2547c478bd9Sstevel@tonic-gate
2557c478bd9Sstevel@tonic-gate if (chosen)
2567c478bd9Sstevel@tonic-gate return (chosen);
2577c478bd9Sstevel@tonic-gate
2587c478bd9Sstevel@tonic-gate node = prom_finddevice("/chosen");
2597c478bd9Sstevel@tonic-gate
2607c478bd9Sstevel@tonic-gate if (node != OBP_BADNODE)
2617c478bd9Sstevel@tonic-gate return (chosen = node);
2627c478bd9Sstevel@tonic-gate
2637c478bd9Sstevel@tonic-gate prom_fatal_error("prom_chosennode: Can't find </chosen>\n");
2647c478bd9Sstevel@tonic-gate /*NOTREACHED*/
26553391bafSeota
26653391bafSeota /*
26753391bafSeota * gcc doesn't recognize "NOTREACHED" and puts the warning.
26853391bafSeota * To surpress it, returning an integer value is required.
26953391bafSeota */
270*fa9e4066Sahrens return ((pnode_t)0);
2717c478bd9Sstevel@tonic-gate }
2727c478bd9Sstevel@tonic-gate
2737c478bd9Sstevel@tonic-gate /*
2747c478bd9Sstevel@tonic-gate * Returns the nodeid of /aliases.
2757c478bd9Sstevel@tonic-gate * /aliases exists in OBP >= 2.4 and in Open Firmware.
2767c478bd9Sstevel@tonic-gate * Returns OBP_BADNODE if it doesn't exist.
2777c478bd9Sstevel@tonic-gate */
278*fa9e4066Sahrens pnode_t
prom_alias_node(void)2797c478bd9Sstevel@tonic-gate prom_alias_node(void)
2807c478bd9Sstevel@tonic-gate {
281*fa9e4066Sahrens static pnode_t node;
2827c478bd9Sstevel@tonic-gate
2837c478bd9Sstevel@tonic-gate if (node == 0)
2847c478bd9Sstevel@tonic-gate node = prom_finddevice("/aliases");
2857c478bd9Sstevel@tonic-gate return (node);
2867c478bd9Sstevel@tonic-gate }
2877c478bd9Sstevel@tonic-gate
2887c478bd9Sstevel@tonic-gate /*
2897c478bd9Sstevel@tonic-gate * Returns the nodeid of /options.
2907c478bd9Sstevel@tonic-gate * Returns OBP_BADNODE if it doesn't exist.
2917c478bd9Sstevel@tonic-gate */
292*fa9e4066Sahrens pnode_t
prom_optionsnode(void)2937c478bd9Sstevel@tonic-gate prom_optionsnode(void)
2947c478bd9Sstevel@tonic-gate {
295*fa9e4066Sahrens static pnode_t node;
2967c478bd9Sstevel@tonic-gate
2977c478bd9Sstevel@tonic-gate if (node == 0)
2987c478bd9Sstevel@tonic-gate node = prom_finddevice("/options");
2997c478bd9Sstevel@tonic-gate return (node);
3007c478bd9Sstevel@tonic-gate }
301