/* * (C) Copyright 2000-2010 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com> * Andreas Heppel <aheppel@sysgo.de> * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include <common.h> #include <command.h> #include <environment.h> #include <linux/stddef.h> #include <search.h> #include <errno.h> #include <malloc.h> DECLARE_GLOBAL_DATA_PTR; extern env_t *env_ptr; extern void env_relocate_spec (void); extern uchar env_get_char_spec(int); static uchar env_get_char_init (int index); /************************************************************************ * Default settings to be used when no valid environment is found */ #define XMK_STR(x) #x #define MK_STR(x) XMK_STR(x) uchar default_environment[] = { #ifdef CONFIG_BOOTARGS "bootargs=" CONFIG_BOOTARGS "\0" #endif #ifdef CONFIG_BOOTCOMMAND "bootcmd=" CONFIG_BOOTCOMMAND "\0" #endif #ifdef CONFIG_RAMBOOTCOMMAND "ramboot=" CONFIG_RAMBOOTCOMMAND "\0" #endif #ifdef CONFIG_NFSBOOTCOMMAND "nfsboot=" CONFIG_NFSBOOTCOMMAND "\0" #endif #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) "bootdelay=" MK_STR(CONFIG_BOOTDELAY) "\0" #endif #if defined(CONFIG_BAUDRATE) && (CONFIG_BAUDRATE >= 0) "baudrate=" MK_STR(CONFIG_BAUDRATE) "\0" #endif #ifdef CONFIG_LOADS_ECHO "loads_echo=" MK_STR(CONFIG_LOADS_ECHO) "\0" #endif #ifdef CONFIG_ETHADDR "ethaddr=" MK_STR(CONFIG_ETHADDR) "\0" #endif #ifdef CONFIG_ETH1ADDR "eth1addr=" MK_STR(CONFIG_ETH1ADDR) "\0" #endif #ifdef CONFIG_ETH2ADDR "eth2addr=" MK_STR(CONFIG_ETH2ADDR) "\0" #endif #ifdef CONFIG_ETH3ADDR "eth3addr=" MK_STR(CONFIG_ETH3ADDR) "\0" #endif #ifdef CONFIG_ETH4ADDR "eth4addr=" MK_STR(CONFIG_ETH4ADDR) "\0" #endif #ifdef CONFIG_ETH5ADDR "eth5addr=" MK_STR(CONFIG_ETH5ADDR) "\0" #endif #ifdef CONFIG_IPADDR "ipaddr=" MK_STR(CONFIG_IPADDR) "\0" #endif #ifdef CONFIG_SERVERIP "serverip=" MK_STR(CONFIG_SERVERIP) "\0" #endif #ifdef CONFIG_SYS_AUTOLOAD "autoload=" CONFIG_SYS_AUTOLOAD "\0" #endif #ifdef CONFIG_PREBOOT "preboot=" CONFIG_PREBOOT "\0" #endif #ifdef CONFIG_ROOTPATH "rootpath=" MK_STR(CONFIG_ROOTPATH) "\0" #endif #ifdef CONFIG_GATEWAYIP "gatewayip=" MK_STR(CONFIG_GATEWAYIP) "\0" #endif #ifdef CONFIG_NETMASK "netmask=" MK_STR(CONFIG_NETMASK) "\0" #endif #ifdef CONFIG_HOSTNAME "hostname=" MK_STR(CONFIG_HOSTNAME) "\0" #endif #ifdef CONFIG_BOOTFILE "bootfile=" MK_STR(CONFIG_BOOTFILE) "\0" #endif #ifdef CONFIG_LOADADDR "loadaddr=" MK_STR(CONFIG_LOADADDR) "\0" #endif #ifdef CONFIG_CLOCKS_IN_MHZ "clocks_in_mhz=1\0" #endif #if defined(CONFIG_PCI_BOOTDELAY) && (CONFIG_PCI_BOOTDELAY > 0) "pcidelay=" MK_STR(CONFIG_PCI_BOOTDELAY) "\0" #endif #ifdef CONFIG_EXTRA_ENV_SETTINGS CONFIG_EXTRA_ENV_SETTINGS #endif "\0" }; struct hsearch_data env_htab; static uchar env_get_char_init (int index) { uchar c; /* if crc was bad, use the default environment */ if (gd->env_valid) c = env_get_char_spec(index); else c = default_environment[index]; return (c); } uchar env_get_char_memory (int index) { return *env_get_addr(index); } uchar env_get_char (int index) { uchar c; /* if relocated to RAM */ if (gd->flags & GD_FLG_RELOC) c = env_get_char_memory(index); else c = env_get_char_init(index); return (c); } uchar *env_get_addr (int index) { if (gd->env_valid) return (uchar *)(gd->env_addr + index); else return &default_environment[index]; } void set_default_env(const char *s) { if (sizeof(default_environment) > ENV_SIZE) { puts("*** Error - default environment is too large\n\n"); return; } if (s) { if (*s == '!') { printf("*** Warning - %s, " "using default environment\n\n", s+1); } else { puts(s); } } else { puts("Using default environment\n\n"); } if (himport_r(&env_htab, (char *)default_environment, sizeof(default_environment), '\0', 0) == 0) { error("Environment import failed: errno = %d\n", errno); } gd->flags |= GD_FLG_ENV_READY; } /* * Check if CRC is valid and (if yes) import the environment. * Note that "buf" may or may not be aligned. */ int env_import(const char *buf, int check) { env_t *ep = (env_t *)buf; if (check) { uint32_t crc; memcpy(&crc, &ep->crc, sizeof(crc)); if (crc32(0, ep->data, ENV_SIZE) != crc) { set_default_env("!bad CRC"); return 0; } } if (himport_r(&env_htab, (char *)ep->data, ENV_SIZE, '\0', 0)) { gd->flags |= GD_FLG_ENV_READY; return 1; } error("Cannot import environment: errno = %d\n", errno); set_default_env("!import failed"); return 0; } void env_relocate (void) { #if defined(CONFIG_NEEDS_MANUAL_RELOC) extern void env_reloc(void); env_reloc(); #endif if (gd->env_valid == 0) { #if defined(CONFIG_ENV_IS_NOWHERE) /* Environment not changable */ set_default_env(NULL); #else show_boot_progress (-60); set_default_env("!bad CRC"); #endif } else { env_relocate_spec (); } } #ifdef CONFIG_AUTO_COMPLETE int env_complete(char *var, int maxv, char *cmdv[], int bufsz, char *buf) { ENTRY *match; int found, idx; idx = 0; found = 0; cmdv[0] = NULL; while ((idx = hmatch_r(var, idx, &match, &env_htab))) { int vallen = strlen(match->key) + 1; if (found >= maxv - 2 || bufsz < vallen) break; cmdv[found++] = buf; memcpy(buf, match->key, vallen); buf += vallen; bufsz -= vallen; } qsort(cmdv, found, sizeof(cmdv[0]), strcmp_compar); if (idx) cmdv[found++] = "..."; cmdv[found] = NULL; return found; } #endif