diff options
Diffstat (limited to 'u-boot/common/env_common.c')
| -rw-r--r-- | u-boot/common/env_common.c | 278 |
1 files changed, 278 insertions, 0 deletions
diff --git a/u-boot/common/env_common.c b/u-boot/common/env_common.c new file mode 100644 index 0000000..c3e6388 --- /dev/null +++ b/u-boot/common/env_common.c @@ -0,0 +1,278 @@ +/* + * (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 |