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Commit 05706fddd0c9d2b97996e545a7a6d31217bd40b9

Authored by wdenk 2002-09-29 01:48:27 +0800

1 parent 14aba9c1dc

Exists in master and in 54 other branches

Initial revision

Showing 1 changed file with 231 additions and 0 deletions Side-by-side Diff

common/env_common.c

common/env_common.c

Diff comments View file @ 05706fd

	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	+
	8	+ * See file CREDITS for list of people who contributed to this
	9	+ * project.
	10	+ *
	11	+ * This program is free software; you can redistribute it and/or
	12	+ * modify it under the terms of the GNU General Public License as
	13	+ * published by the Free Software Foundation; either version 2 of
	14	+ * the License, or (at your option) any later version.
	15	+ *
	16	+ * This program is distributed in the hope that it will be useful,
	17	+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	+ * GNU General Public License for more details.
	20	+ *
	21	+ * You should have received a copy of the GNU General Public License
	22	+ * along with this program; if not, write to the Free Software
	23	+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	24	+ * MA 02111-1307 USA
	25	+ */
	26	+
	27	+#include <common.h>
	28	+#include <command.h>
	29	+#include <environment.h>
	30	+#include <cmd_nvedit.h>
	31	+#include <linux/stddef.h>
	32	+#include <malloc.h>
	33	+
	34	+#ifdef CONFIG_SHOW_BOOT_PROGRESS
	35	+# include <status_led.h>
	36	+# define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg)
	37	+#else
	38	+# define SHOW_BOOT_PROGRESS(arg)
	39	+#endif
	40	+
	41	+#undef DEBUG_ENV
	42	+#ifdef DEBUG_ENV
	43	+#define DEBUGF(fmt,args...) printf(fmt ,##args)
	44	+#else
	45	+#define DEBUGF(fmt,args...)
	46	+#endif
	47	+
	48	+extern env_t *env_ptr;
	49	+
	50	+extern void env_relocate_spec (void);
	51	+extern uchar env_get_char_spec(int);
	52	+
	53	+static uchar env_get_char_init (int index);
	54	+uchar (*env_get_char)(int) = env_get_char_init;
	55	+
	56	+/************************************************************************
	57	+ * Default settings to be used when no valid environment is found
	58	+ */
	59	+#define XMK_STR(x) #x
	60	+#define MK_STR(x) XMK_STR(x)
	61	+
	62	+uchar default_environment[] = {
	63	+#ifdef CONFIG_BOOTARGS
	64	+ "bootargs=" CONFIG_BOOTARGS "\0"
	65	+#endif
	66	+#ifdef CONFIG_BOOTCOMMAND
	67	+ "bootcmd=" CONFIG_BOOTCOMMAND "\0"
	68	+#endif
	69	+#ifdef CONFIG_RAMBOOTCOMMAND
	70	+ "ramboot=" CONFIG_RAMBOOTCOMMAND "\0"
	71	+#endif
	72	+#ifdef CONFIG_NFSBOOTCOMMAND
	73	+ "nfsboot=" CONFIG_NFSBOOTCOMMAND "\0"
	74	+#endif
	75	+#if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
	76	+ "bootdelay=" MK_STR(CONFIG_BOOTDELAY) "\0"
	77	+#endif
	78	+#if defined(CONFIG_BAUDRATE) && (CONFIG_BAUDRATE >= 0)
	79	+ "baudrate=" MK_STR(CONFIG_BAUDRATE) "\0"
	80	+#endif
	81	+#ifdef CONFIG_LOADS_ECHO
	82	+ "loads_echo=" MK_STR(CONFIG_LOADS_ECHO) "\0"
	83	+#endif
	84	+#ifdef CONFIG_ETHADDR
	85	+ "ethaddr=" MK_STR(CONFIG_ETHADDR) "\0"
	86	+#endif
	87	+#ifdef CONFIG_ETH1ADDR
	88	+ "eth1addr=" MK_STR(CONFIG_ETH1ADDR) "\0"
	89	+#endif
	90	+#ifdef CONFIG_ETH2ADDR
	91	+ "eth2addr=" MK_STR(CONFIG_ETH2ADDR) "\0"
	92	+#endif
	93	+#ifdef CONFIG_IPADDR
	94	+ "ipaddr=" MK_STR(CONFIG_IPADDR) "\0"
	95	+#endif
	96	+#ifdef CONFIG_SERVERIP
	97	+ "serverip=" MK_STR(CONFIG_SERVERIP) "\0"
	98	+#endif
	99	+#ifdef CFG_AUTOLOAD
	100	+ "autoload=" CFG_AUTOLOAD "\0"
	101	+#endif
	102	+#ifdef CONFIG_PREBOOT
	103	+ "preboot=" CONFIG_PREBOOT "\0"
	104	+#endif
	105	+#ifdef CONFIG_ROOTPATH
	106	+ "rootpath=" MK_STR(CONFIG_ROOTPATH) "\0"
	107	+#endif
	108	+#ifdef CONFIG_GATEWAYIP
	109	+ "gatewayip=" MK_STR(CONFIG_GATEWAYIP) "\0"
	110	+#endif
	111	+#ifdef CONFIG_NETMASK
	112	+ "netmask=" MK_STR(CONFIG_NETMASK) "\0"
	113	+#endif
	114	+#ifdef CONFIG_HOSTNAME
	115	+ "hostname=" MK_STR(CONFIG_HOSTNAME) "\0"
	116	+#endif
	117	+#ifdef CONFIG_BOOTFILE
	118	+ "bootfile=" MK_STR(CONFIG_BOOTFILE) "\0"
	119	+#endif
	120	+#ifdef CONFIG_LOADADDR
	121	+ "loadaddr=" MK_STR(CONFIG_LOADADDR) "\0"
	122	+#endif
	123	+#ifdef CONFIG_CLOCKS_IN_MHZ
	124	+ "clocks_in_mhz=1\0"
	125	+#endif
	126	+#ifdef CONFIG_EXTRA_ENV_SETTINGS
	127	+ CONFIG_EXTRA_ENV_SETTINGS
	128	+#endif
	129	+ "\0"
	130	+};
	131	+
	132	+
	133	+void env_crc_update (void)
	134	+{
	135	+ env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
	136	+}
	137	+
	138	+static uchar env_get_char_init (int index)
	139	+{
	140	+ DECLARE_GLOBAL_DATA_PTR;
	141	+ uchar c;
	142	+
	143	+ /* if crc was bad, use the default environment */
	144	+ if (gd->env_valid)
	145	+ {
	146	+ c = env_get_char_spec(index);
	147	+ } else {
	148	+ c = default_environment[index];
	149	+ }
	150	+
	151	+ return (c);
	152	+}
	153	+
	154	+uchar env_get_char_memory (int index)
	155	+{
	156	+ DECLARE_GLOBAL_DATA_PTR;
	157	+
	158	+ if (gd->env_valid) {
	159	+ return ( ((uchar )(gd->env_addr + index)) );
	160	+ } else {
	161	+ return ( default_environment[index] );
	162	+ }
	163	+}
	164	+
	165	+uchar *env_get_addr (int index)
	166	+{
	167	+ DECLARE_GLOBAL_DATA_PTR;
	168	+
	169	+ if (gd->env_valid) {
	170	+ return ( ((uchar *)(gd->env_addr + index)) );
	171	+ } else {
	172	+ return (&default_environment[index]);
	173	+ }
	174	+}
	175	+
	176	+void env_relocate (void)
	177	+{
	178	+ DECLARE_GLOBAL_DATA_PTR;
	179	+
	180	+ DEBUGF ("%s[%d] offset = 0x%lx\n", __FUNCTION__,__LINE__,
	181	+ gd->reloc_off);
	182	+
	183	+#ifdef ENV_IS_EMBEDDED
	184	+ /*
	185	+ * The environment buffer is embedded with the text segment,
	186	+ * just relocate the environment pointer
	187	+ */
	188	+ env_ptr = (env_t *)((ulong)env_ptr + gd->reloc_off);
	189	+ DEBUGF ("%s[%d] embedded ENV at %p\n", __FUNCTION__,__LINE__,env_ptr);
	190	+#else
	191	+ /*
	192	+ * We must allocate a buffer for the environment
	193	+ */
	194	+ env_ptr = (env_t *)malloc (CFG_ENV_SIZE);
	195	+ DEBUGF ("%s[%d] malloced ENV at %p\n", __FUNCTION__,__LINE__,env_ptr);
	196	+#endif
	197	+
	198	+ /*
	199	+ * After relocation to RAM, we can always use the "memory" functions
	200	+ */
	201	+ env_get_char = env_get_char_memory;
	202	+
	203	+ if (gd->env_valid == 0) {
	204	+#if defined(CONFIG_GTH) \|\| defined(CFG_ENV_IS_NOWHERE) /* Environment not changable */
	205	+ puts ("Using default environment\n\n");
	206	+#else
	207	+ puts ("*** Warning - bad CRC, using default environment\n\n");
	208	+ SHOW_BOOT_PROGRESS (-1);
	209	+#endif
	210	+
	211	+ if (sizeof(default_environment) > ENV_SIZE)
	212	+ {
	213	+ puts ("*** Error - default environment is too large\n\n");
	214	+ return;
	215	+ }
	216	+
	217	+ memset (env_ptr, 0, sizeof(env_t));
	218	+ memcpy (env_ptr->data,
	219	+ default_environment,
	220	+ sizeof(default_environment));
	221	+#ifdef CFG_REDUNDAND_ENVIRONMENT
	222	+ env_ptr->flags = 0xFF;
	223	+#endif
	224	+ env_crc_update ();
	225	+ gd->env_valid = 1;
	226	+ }
	227	+ else {
	228	+ env_relocate_spec ();
	229	+ }
	230	+ gd->env_addr = (ulong)&(env_ptr->data);
	231	+}