diff options
Diffstat (limited to 'common/env_common.c')
| -rw-r--r-- | common/env_common.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/common/env_common.c b/common/env_common.c new file mode 100644 index 0000000..f7f268e --- /dev/null +++ b/common/env_common.c @@ -0,0 +1,231 @@ +/* + * (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 <cmd_nvedit.h> +#include <linux/stddef.h> +#include <malloc.h> + +#ifdef CONFIG_SHOW_BOOT_PROGRESS +# include <status_led.h> +# define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg) +#else +# define SHOW_BOOT_PROGRESS(arg) +#endif + +#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); +uchar (*env_get_char)(int) = env_get_char_init; + +/************************************************************************ + * 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_IPADDR + "ipaddr=" MK_STR(CONFIG_IPADDR) "\0" +#endif +#ifdef CONFIG_SERVERIP + "serverip=" MK_STR(CONFIG_SERVERIP) "\0" +#endif +#ifdef CFG_AUTOLOAD + "autoload=" CFG_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 +#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) +{ + DECLARE_GLOBAL_DATA_PTR; + 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) +{ + DECLARE_GLOBAL_DATA_PTR; + + if (gd->env_valid) { + return ( *((uchar *)(gd->env_addr + index)) ); + } else { + return ( default_environment[index] ); + } +} + +uchar *env_get_addr (int index) +{ + DECLARE_GLOBAL_DATA_PTR; + + if (gd->env_valid) { + return ( ((uchar *)(gd->env_addr + index)) ); + } else { + return (&default_environment[index]); + } +} + +void env_relocate (void) +{ + DECLARE_GLOBAL_DATA_PTR; + + DEBUGF ("%s[%d] offset = 0x%lx\n", __FUNCTION__,__LINE__, + gd->reloc_off); + +#ifdef ENV_IS_EMBEDDED + /* + * The environment buffer is embedded with the text segment, + * just relocate the environment pointer + */ + env_ptr = (env_t *)((ulong)env_ptr + gd->reloc_off); + 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 (CFG_ENV_SIZE); + DEBUGF ("%s[%d] malloced ENV at %p\n", __FUNCTION__,__LINE__,env_ptr); +#endif + + /* + * After relocation to RAM, we can always use the "memory" functions + */ + env_get_char = env_get_char_memory; + + if (gd->env_valid == 0) { +#if defined(CONFIG_GTH) || defined(CFG_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 (-1); +#endif + + 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 CFG_REDUNDAND_ENVIRONMENT + env_ptr->flags = 0xFF; +#endif + env_crc_update (); + gd->env_valid = 1; + } + else { + env_relocate_spec (); + } + gd->env_addr = (ulong)&(env_ptr->data); +} |