cfe_env.c revision 202061
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 202061 2010-01-11 03:43:18Z 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