env_common.c 7.0 KB

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  1. /*
  2. * (C) Copyright 2000-2002
  3. * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  4. *
  5. * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  6. * Andreas Heppel <aheppel@sysgo.de>
  7. * See file CREDITS for list of people who contributed to this
  8. * project.
  9. *
  10. * This program is free software; you can redistribute it and/or
  11. * modify it under the terms of the GNU General Public License as
  12. * published by the Free Software Foundation; either version 2 of
  13. * the License, or (at your option) any later version.
  14. *
  15. * This program is distributed in the hope that it will be useful,
  16. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18. * GNU General Public License for more details.
  19. *
  20. * You should have received a copy of the GNU General Public License
  21. * along with this program; if not, write to the Free Software
  22. * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23. * MA 02111-1307 USA
  24. */
  25. #include <common.h>
  26. #include <command.h>
  27. #include <environment.h>
  28. #include <linux/stddef.h>
  29. #include <malloc.h>
  30. DECLARE_GLOBAL_DATA_PTR;
  31. #ifdef CONFIG_AMIGAONEG3SE
  32. extern void enable_nvram(void);
  33. extern void disable_nvram(void);
  34. #endif
  35. #undef DEBUG_ENV
  36. #ifdef DEBUG_ENV
  37. #define DEBUGF(fmt,args...) printf(fmt ,##args)
  38. #else
  39. #define DEBUGF(fmt,args...)
  40. #endif
  41. extern env_t *env_ptr;
  42. extern void env_relocate_spec (void);
  43. extern uchar env_get_char_spec(int);
  44. static uchar env_get_char_init (int index);
  45. /************************************************************************
  46. * Default settings to be used when no valid environment is found
  47. */
  48. #define XMK_STR(x) #x
  49. #define MK_STR(x) XMK_STR(x)
  50. uchar default_environment[] = {
  51. #ifdef CONFIG_BOOTARGS
  52. "bootargs=" CONFIG_BOOTARGS "\0"
  53. #endif
  54. #ifdef CONFIG_BOOTCOMMAND
  55. "bootcmd=" CONFIG_BOOTCOMMAND "\0"
  56. #endif
  57. #ifdef CONFIG_RAMBOOTCOMMAND
  58. "ramboot=" CONFIG_RAMBOOTCOMMAND "\0"
  59. #endif
  60. #ifdef CONFIG_NFSBOOTCOMMAND
  61. "nfsboot=" CONFIG_NFSBOOTCOMMAND "\0"
  62. #endif
  63. #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  64. "bootdelay=" MK_STR(CONFIG_BOOTDELAY) "\0"
  65. #endif
  66. #if defined(CONFIG_BAUDRATE) && (CONFIG_BAUDRATE >= 0)
  67. "baudrate=" MK_STR(CONFIG_BAUDRATE) "\0"
  68. #endif
  69. #ifdef CONFIG_LOADS_ECHO
  70. "loads_echo=" MK_STR(CONFIG_LOADS_ECHO) "\0"
  71. #endif
  72. #ifdef CONFIG_ETHADDR
  73. "ethaddr=" MK_STR(CONFIG_ETHADDR) "\0"
  74. #endif
  75. #ifdef CONFIG_ETH1ADDR
  76. "eth1addr=" MK_STR(CONFIG_ETH1ADDR) "\0"
  77. #endif
  78. #ifdef CONFIG_ETH2ADDR
  79. "eth2addr=" MK_STR(CONFIG_ETH2ADDR) "\0"
  80. #endif
  81. #ifdef CONFIG_ETH3ADDR
  82. "eth3addr=" MK_STR(CONFIG_ETH3ADDR) "\0"
  83. #endif
  84. #ifdef CONFIG_ETH4ADDR
  85. "eth4addr=" MK_STR(CONFIG_ETH4ADDR) "\0"
  86. #endif
  87. #ifdef CONFIG_ETH5ADDR
  88. "eth5addr=" MK_STR(CONFIG_ETH5ADDR) "\0"
  89. #endif
  90. #ifdef CONFIG_IPADDR
  91. "ipaddr=" MK_STR(CONFIG_IPADDR) "\0"
  92. #endif
  93. #ifdef CONFIG_SERVERIP
  94. "serverip=" MK_STR(CONFIG_SERVERIP) "\0"
  95. #endif
  96. #ifdef CONFIG_SYS_AUTOLOAD
  97. "autoload=" CONFIG_SYS_AUTOLOAD "\0"
  98. #endif
  99. #ifdef CONFIG_PREBOOT
  100. "preboot=" CONFIG_PREBOOT "\0"
  101. #endif
  102. #ifdef CONFIG_ROOTPATH
  103. "rootpath=" MK_STR(CONFIG_ROOTPATH) "\0"
  104. #endif
  105. #ifdef CONFIG_GATEWAYIP
  106. "gatewayip=" MK_STR(CONFIG_GATEWAYIP) "\0"
  107. #endif
  108. #ifdef CONFIG_NETMASK
  109. "netmask=" MK_STR(CONFIG_NETMASK) "\0"
  110. #endif
  111. #ifdef CONFIG_HOSTNAME
  112. "hostname=" MK_STR(CONFIG_HOSTNAME) "\0"
  113. #endif
  114. #ifdef CONFIG_BOOTFILE
  115. "bootfile=" MK_STR(CONFIG_BOOTFILE) "\0"
  116. #endif
  117. #ifdef CONFIG_LOADADDR
  118. "loadaddr=" MK_STR(CONFIG_LOADADDR) "\0"
  119. #endif
  120. #ifdef CONFIG_CLOCKS_IN_MHZ
  121. "clocks_in_mhz=1\0"
  122. #endif
  123. #if defined(CONFIG_PCI_BOOTDELAY) && (CONFIG_PCI_BOOTDELAY > 0)
  124. "pcidelay=" MK_STR(CONFIG_PCI_BOOTDELAY) "\0"
  125. #endif
  126. #ifdef CONFIG_EXTRA_ENV_SETTINGS
  127. CONFIG_EXTRA_ENV_SETTINGS
  128. #endif
  129. "\0"
  130. };
  131. void env_crc_update (void)
  132. {
  133. env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
  134. }
  135. static uchar env_get_char_init (int index)
  136. {
  137. uchar c;
  138. /* if crc was bad, use the default environment */
  139. if (gd->env_valid)
  140. {
  141. c = env_get_char_spec(index);
  142. } else {
  143. c = default_environment[index];
  144. }
  145. return (c);
  146. }
  147. #ifdef CONFIG_AMIGAONEG3SE
  148. uchar env_get_char_memory (int index)
  149. {
  150. uchar retval;
  151. enable_nvram();
  152. if (gd->env_valid) {
  153. retval = ( *((uchar *)(gd->env_addr + index)) );
  154. } else {
  155. retval = ( default_environment[index] );
  156. }
  157. disable_nvram();
  158. return retval;
  159. }
  160. #else
  161. uchar env_get_char_memory (int index)
  162. {
  163. if (gd->env_valid) {
  164. return ( *((uchar *)(gd->env_addr + index)) );
  165. } else {
  166. return ( default_environment[index] );
  167. }
  168. }
  169. #endif
  170. uchar env_get_char (int index)
  171. {
  172. uchar c;
  173. /* if relocated to RAM */
  174. if (gd->flags & GD_FLG_RELOC)
  175. c = env_get_char_memory(index);
  176. else
  177. c = env_get_char_init(index);
  178. return (c);
  179. }
  180. uchar *env_get_addr (int index)
  181. {
  182. if (gd->env_valid) {
  183. return ( ((uchar *)(gd->env_addr + index)) );
  184. } else {
  185. return (&default_environment[index]);
  186. }
  187. }
  188. void set_default_env(void)
  189. {
  190. if (sizeof(default_environment) > ENV_SIZE) {
  191. puts ("*** Error - default environment is too large\n\n");
  192. return;
  193. }
  194. memset(env_ptr, 0, sizeof(env_t));
  195. memcpy(env_ptr->data, default_environment,
  196. sizeof(default_environment));
  197. #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
  198. env_ptr->flags = 0xFF;
  199. #endif
  200. env_crc_update ();
  201. gd->env_valid = 1;
  202. }
  203. void env_relocate (void)
  204. {
  205. #ifndef CONFIG_RELOC_FIXUP_WORKS
  206. DEBUGF ("%s[%d] offset = 0x%lx\n", __FUNCTION__,__LINE__,
  207. gd->reloc_off);
  208. #endif
  209. #ifdef CONFIG_AMIGAONEG3SE
  210. enable_nvram();
  211. #endif
  212. #ifdef ENV_IS_EMBEDDED
  213. /*
  214. * The environment buffer is embedded with the text segment,
  215. * just relocate the environment pointer
  216. */
  217. #ifndef CONFIG_RELOC_FIXUP_WORKS
  218. env_ptr = (env_t *)((ulong)env_ptr + gd->reloc_off);
  219. #endif
  220. DEBUGF ("%s[%d] embedded ENV at %p\n", __FUNCTION__,__LINE__,env_ptr);
  221. #else
  222. /*
  223. * We must allocate a buffer for the environment
  224. */
  225. env_ptr = (env_t *)malloc (CONFIG_ENV_SIZE);
  226. DEBUGF ("%s[%d] malloced ENV at %p\n", __FUNCTION__,__LINE__,env_ptr);
  227. #endif
  228. if (gd->env_valid == 0) {
  229. #if defined(CONFIG_GTH) || defined(CONFIG_ENV_IS_NOWHERE) /* Environment not changable */
  230. puts ("Using default environment\n\n");
  231. #else
  232. puts ("*** Warning - bad CRC, using default environment\n\n");
  233. show_boot_progress (-60);
  234. #endif
  235. set_default_env();
  236. }
  237. else {
  238. env_relocate_spec ();
  239. }
  240. gd->env_addr = (ulong)&(env_ptr->data);
  241. #ifdef CONFIG_AMIGAONEG3SE
  242. disable_nvram();
  243. #endif
  244. }
  245. #ifdef CONFIG_AUTO_COMPLETE
  246. int env_complete(char *var, int maxv, char *cmdv[], int bufsz, char *buf)
  247. {
  248. int i, nxt, len, vallen, found;
  249. const char *lval, *rval;
  250. found = 0;
  251. cmdv[0] = NULL;
  252. len = strlen(var);
  253. /* now iterate over the variables and select those that match */
  254. for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
  255. for (nxt=i; env_get_char(nxt) != '\0'; ++nxt)
  256. ;
  257. lval = (char *)env_get_addr(i);
  258. rval = strchr(lval, '=');
  259. if (rval != NULL) {
  260. vallen = rval - lval;
  261. rval++;
  262. } else
  263. vallen = strlen(lval);
  264. if (len > 0 && (vallen < len || memcmp(lval, var, len) != 0))
  265. continue;
  266. if (found >= maxv - 2 || bufsz < vallen + 1) {
  267. cmdv[found++] = "...";
  268. break;
  269. }
  270. cmdv[found++] = buf;
  271. memcpy(buf, lval, vallen); buf += vallen; bufsz -= vallen;
  272. *buf++ = '\0'; bufsz--;
  273. }
  274. cmdv[found] = NULL;
  275. return found;
  276. }
  277. #endif