/* * (C) Copyright 2000-2002 * 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 <malloc.h> DECLARE_GLOBAL_DATA_PTR; #undef DEBUG_ENV #ifdef DEBUG_ENV #define DEBUGF(fmt,args...) printf(fmt ,##args) #else #define DEBUGF(fmt,args...) #endif 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" }; void env_crc_update (void) { env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE); } 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) { if (gd->env_valid) { return ( *((uchar *)(gd->env_addr + index)) ); } else { return ( default_environment[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(void) { if (sizeof(default_environment) > ENV_SIZE) { puts ("*** Error - default environment is too large\n\n"); return; } memset(env_ptr, 0, sizeof(env_t)); memcpy(env_ptr->data, default_environment, sizeof(default_environment)); #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT env_ptr->flags = 0xFF; #endif env_crc_update (); gd->env_valid = 1; } void env_relocate (void) { #ifndef CONFIG_RELOC_FIXUP_WORKS DEBUGF ("%s[%d] offset = 0x%lx\n", __FUNCTION__,__LINE__, gd->reloc_off); #endif #ifdef ENV_IS_EMBEDDED /* * The environment buffer is embedded with the text segment, * just relocate the environment pointer */ #ifndef CONFIG_RELOC_FIXUP_WORKS env_ptr = (env_t *)((ulong)env_ptr + gd->reloc_off); #endif DEBUGF ("%s[%d] embedded ENV at %p\n", __FUNCTION__,__LINE__,env_ptr); #else /* * We must allocate a buffer for the environment */ env_ptr = (env_t *)malloc (CONFIG_ENV_SIZE); DEBUGF ("%s[%d] malloced ENV at %p\n", __FUNCTION__,__LINE__,env_ptr); #endif if (gd->env_valid == 0) { #if defined(CONFIG_ENV_IS_NOWHERE) /* Environment not changable */ puts ("Using default environment\n\n"); #else puts ("*** Warning - bad CRC, using default environment\n\n"); show_boot_progress (-60); #endif set_default_env(); } else { env_relocate_spec (); } gd->env_addr = (ulong)&(env_ptr->data); } #ifdef CONFIG_AUTO_COMPLETE int env_complete(char *var, int maxv, char *cmdv[], int bufsz, char *buf) { int i, nxt, len, vallen, found; const char *lval, *rval; found = 0; cmdv[0] = NULL; len = strlen(var); /* now iterate over the variables and select those that match */ for (i=0; env_get_char(i) != '\0'; i=nxt+1) { for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) ; lval = (char *)env_get_addr(i); rval = strchr(lval, '='); if (rval != NULL) { vallen = rval - lval; rval++; } else vallen = strlen(lval); if (len > 0 && (vallen < len || memcmp(lval, var, len) != 0)) continue; if (found >= maxv - 2 || bufsz < vallen + 1) { cmdv[found++] = "..."; break; } cmdv[found++] = buf; memcpy(buf, lval, vallen); buf += vallen; bufsz -= vallen; *buf++ = '\0'; bufsz--; } cmdv[found] = NULL; return found; } #endif