cfe_env.c revision 202105 
1/*-
2 * Copyright (c) 2009 Neelkanth Natu
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/param.h>
28#include <sys/kernel.h>
29#include <sys/systm.h>
30
31#include <dev/cfe/cfe_api.h>
32
33__FBSDID("$FreeBSD: head/sys/dev/cfe/cfe_env.c 202105 2010-01-11 19:21:52Z imp $");
34
35#ifndef	CFE_ENV_SIZE
36#define	CFE_ENV_SIZE	PAGE_SIZE	/* default is one page */
37#endif
38
39extern void cfe_env_init(void);
40
41static char cfe_env_buf[CFE_ENV_SIZE];
42
43void
44cfe_env_init(void)
45{
46	int idx, len;
47	char name[64], val[128], *cp, *cplim;
48
49	cp = cfe_env_buf;
50	cplim = cp + CFE_ENV_SIZE;
51
52	idx = 0;
53	while (1) {
54		if (cfe_enumenv(idx, name, sizeof(name), val, sizeof(val)) != 0)
55			break;
56
57		if (bootverbose)
58			printf("Importing CFE env: \"%s=%s\"\n", name, val);
59
60		/*
61		 * name=val\0\0
62		 */
63		len = strlen(name) + 1 + strlen(val) + 1 + 1;
64		if (cplim - cp < len)
65			printf("No space to store CFE env: \"%s=%s\"\n",
66				name, val);
67		else
68			cp += sprintf(cp, "%s=%s", name, val) + 1;
69		++idx;
70	}
71	*cp++ = '\0';
72
73	kern_envp = cfe_env_buf;
74}
75