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/*
* 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 1996-2002 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "benv.h"
#include <sys/sunddi.h>
#include <sys/ddi_impldefs.h>
#include <sys/openpromio.h>
#include <stdio.h>
static int getpropval(struct openpromio *opp, char *prop);
static char *promdev = "/dev/openprom";
static int prom_fd;
static char *mfail = "malloc";
/*
* 128 is the size of the largest (currently) property name
* 16384 - MAXPROPSIZE - sizeof (int) is the size of the largest
* (currently) property value that is allowed.
* the sizeof (u_int) is from struct openpromio
*/
#define MAXPROPSIZE 128
#define MAXVALSIZE (16384 - MAXPROPSIZE - sizeof (u_int))
#define BUFSIZE (MAXPROPSIZE + MAXVALSIZE + sizeof (u_int))
#define MINVALSIZE (4 * sizeof (u_long))
#define MINBUFSIZE (MINVALSIZE + sizeof (u_long))
typedef union {
char buf[BUFSIZE];
struct openpromio opp;
} Oppbuf;
typedef union {
char buf[MINVALSIZE + sizeof (u_int)];
struct openpromio opp;
} Oppbuf_small;
static Oppbuf oppbuf;
static unsigned long
next(unsigned long id)
{
Oppbuf_small oppbuf;
struct openpromio *opp = &(oppbuf.opp);
unsigned long *ip = (unsigned long *)(opp->oprom_array);
memset(oppbuf.buf, 0, MINBUFSIZE);
opp->oprom_size = MINVALSIZE;
*ip = id;
if (ioctl(prom_fd, OPROMNEXT, opp) < 0)
return (0);
return (*(unsigned long *)opp->oprom_array);
}
static unsigned long
child(unsigned long id)
{
Oppbuf_small oppbuf;
struct openpromio *opp = &(oppbuf.opp);
unsigned long *ip = (unsigned long *)(opp->oprom_array);
memset(oppbuf.buf, 0, MINBUFSIZE);
opp->oprom_size = MINVALSIZE;
*ip = id;
if (ioctl(prom_fd, OPROMCHILD, opp) < 0)
return (0);
return (*(unsigned long *)opp->oprom_array);
}
/*
* Find a node by name from the prom device tree.
* Return the id or 0 if it is not found.
*/
static unsigned long
prom_findnode_byname(unsigned long id, char *name)
{
struct openpromio *opp = &(oppbuf.opp);
unsigned long nid;
if (id == 0)
return (0);
if (!getpropval(opp, "name"))
return (0);
if (strcmp(opp->oprom_array, name) == 0)
return (id);
if (nid = prom_findnode_byname(child(id), name))
return (nid);
if (nid = prom_findnode_byname(next(id), name))
return (nid);
return (0);
}
/*
* Make the current prom node be the rootnode and return its id.
*/
static unsigned long
prom_rootnode()
{
return (next(0));
}
static int
getpropval(struct openpromio *opp, char *prop)
{
opp->oprom_size = MAXVALSIZE;
(void) strlcpy(opp->oprom_array, prop, MAXPROPSIZE);
if (ioctl(prom_fd, OPROMGETPROP, opp) < 0)
return (0);
if (opp->oprom_size == 0)
return (0);
return (1);
}
static int
getnextprop(struct openpromio *opp, char *prop)
{
opp->oprom_size = MAXVALSIZE;
(void) strlcpy(opp->oprom_array, prop, MAXPROPSIZE);
if (ioctl(prom_fd, OPROMNXTPROP, opp) < 0)
return (0);
if (opp->oprom_size == 0)
return (0);
return (1);
}
/*
* Get a pointer to the requested property from the current node.
* The property is stored in static storage and the returned pointer
* points into the static storage. The property length is placed in
* the location pointed to by the third argument.
*/
static unsigned char *
prom_getprop(char *prop, int *lenp)
{
struct openpromio *opp = &(oppbuf.opp);
if (!getpropval(opp, prop))
return (NULL);
*lenp = opp->oprom_size;
return ((unsigned char *)opp->oprom_array);
}
static unsigned char *
prom_nextprop(char *prop)
{
struct openpromio *opp = &(oppbuf.opp);
if (!getnextprop(opp, prop))
return ((unsigned char *)0);
return ((unsigned char *)opp->oprom_array);
}
ddi_prop_t *
get_proplist(char *name)
{
ddi_prop_t *plist, *npp, *plast;
char *curprop, *newprop;
unsigned char *propval;
unsigned long id;
plist = NULL;
plast = NULL;
id = prom_findnode_byname(prom_rootnode(), name);
if (id == 0)
return (plist);
curprop = "";
while (newprop = (char *)prom_nextprop(curprop)) {
curprop = strdup(newprop);
npp = (ddi_prop_t *)malloc(sizeof (ddi_prop_t));
if (npp == 0)
exit(_error(PERROR, mfail));
propval = prom_getprop(curprop, &npp->prop_len);
npp->prop_name = curprop;
if (propval != NULL) {
npp->prop_val = (char *)malloc(npp->prop_len);
if (npp->prop_val == 0)
exit(_error(PERROR, mfail));
memcpy(npp->prop_val, propval, npp->prop_len);
} else
npp->prop_val = NULL;
npp->prop_next = NULL;
if (plast == NULL) {
plist = npp;
} else {
plast->prop_next = npp;
}
plast = npp;
}
return (plist);
}
caddr_t
get_propval(char *name, char *node)
{
ddi_prop_t *prop, *plist;
if ((plist = get_proplist(node)) == NULL)
return (NULL);
for (prop = plist; prop != NULL; prop = prop->prop_next)
if (strcmp(prop->prop_name, name) == 0)
return (prop->prop_val);
return (NULL);
}
void
get_kbenv(void)
{
if ((prom_fd = open(promdev, O_RDONLY)) < 0) {
exit(_error(PERROR, "prom open failed"));
}
}
void
close_kbenv(void)
{
(void) close(prom_fd);
}
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