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* Code cleanup:
[people/ms/u-boot.git] / common / env_common.c
CommitLineData
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WD		 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>
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WD		 30#include <linux/stddef.h>
31#include <malloc.h>
32
33#ifdef CONFIG_SHOW_BOOT_PROGRESS
34# include <status_led.h>
35# define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg)
36#else
37# define SHOW_BOOT_PROGRESS(arg)
38#endif
39
c7de829c
WD		 40#ifdef CONFIG_AMIGAONEG3SE
41 extern void enable_nvram(void);
42 extern void disable_nvram(void);
43#endif
44
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WD		 45#undef DEBUG_ENV
46#ifdef DEBUG_ENV
47#define DEBUGF(fmt,args...) printf(fmt ,##args)
48#else
49#define DEBUGF(fmt,args...)
50#endif
51
52extern env_t *env_ptr;
53
54extern void env_relocate_spec (void);
55extern uchar env_get_char_spec(int);
56
57static uchar env_get_char_init (int index);
58uchar (*env_get_char)(int) = env_get_char_init;
59
60/************************************************************************
61 * Default settings to be used when no valid environment is found
62 */
63#define XMK_STR(x) #x
64#define MK_STR(x) XMK_STR(x)
65
66uchar default_environment[] = {
67#ifdef CONFIG_BOOTARGS
68 "bootargs=" CONFIG_BOOTARGS "\0"
69#endif
70#ifdef CONFIG_BOOTCOMMAND
71 "bootcmd=" CONFIG_BOOTCOMMAND "\0"
72#endif
73#ifdef CONFIG_RAMBOOTCOMMAND
74 "ramboot=" CONFIG_RAMBOOTCOMMAND "\0"
75#endif
76#ifdef CONFIG_NFSBOOTCOMMAND
77 "nfsboot=" CONFIG_NFSBOOTCOMMAND "\0"
78#endif
79#if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
80 "bootdelay=" MK_STR(CONFIG_BOOTDELAY) "\0"
81#endif
82#if defined(CONFIG_BAUDRATE) && (CONFIG_BAUDRATE >= 0)
83 "baudrate=" MK_STR(CONFIG_BAUDRATE) "\0"
84#endif
85#ifdef CONFIG_LOADS_ECHO
86 "loads_echo=" MK_STR(CONFIG_LOADS_ECHO) "\0"
87#endif
88#ifdef CONFIG_ETHADDR
89 "ethaddr=" MK_STR(CONFIG_ETHADDR) "\0"
90#endif
91#ifdef CONFIG_ETH1ADDR
92 "eth1addr=" MK_STR(CONFIG_ETH1ADDR) "\0"
93#endif
94#ifdef CONFIG_ETH2ADDR
95 "eth2addr=" MK_STR(CONFIG_ETH2ADDR) "\0"
96#endif
97#ifdef CONFIG_IPADDR
98 "ipaddr=" MK_STR(CONFIG_IPADDR) "\0"
99#endif
100#ifdef CONFIG_SERVERIP
101 "serverip=" MK_STR(CONFIG_SERVERIP) "\0"
102#endif
103#ifdef CFG_AUTOLOAD
104 "autoload=" CFG_AUTOLOAD "\0"
105#endif
106#ifdef CONFIG_PREBOOT
107 "preboot=" CONFIG_PREBOOT "\0"
108#endif
109#ifdef CONFIG_ROOTPATH
110 "rootpath=" MK_STR(CONFIG_ROOTPATH) "\0"
111#endif
112#ifdef CONFIG_GATEWAYIP
113 "gatewayip=" MK_STR(CONFIG_GATEWAYIP) "\0"
114#endif
115#ifdef CONFIG_NETMASK
116 "netmask=" MK_STR(CONFIG_NETMASK) "\0"
117#endif
118#ifdef CONFIG_HOSTNAME
119 "hostname=" MK_STR(CONFIG_HOSTNAME) "\0"
120#endif
121#ifdef CONFIG_BOOTFILE
122 "bootfile=" MK_STR(CONFIG_BOOTFILE) "\0"
123#endif
124#ifdef CONFIG_LOADADDR
125 "loadaddr=" MK_STR(CONFIG_LOADADDR) "\0"
126#endif
127#ifdef CONFIG_CLOCKS_IN_MHZ
128 "clocks_in_mhz=1\0"
129#endif
ad10dd9a
SR		 130#if defined(CONFIG_PCI_BOOTDELAY) && (CONFIG_PCI_BOOTDELAY > 0)
131 "pcidelay=" MK_STR(CONFIG_PCI_BOOTDELAY) "\0"
132#endif
05706fdd
WD		 133#ifdef CONFIG_EXTRA_ENV_SETTINGS
134 CONFIG_EXTRA_ENV_SETTINGS
135#endif
136 "\0"
137};
138
139
140void env_crc_update (void)
141{
142 env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
143}
144
145static uchar env_get_char_init (int index)
146{
147 DECLARE_GLOBAL_DATA_PTR;
148 uchar c;
149
150 /* if crc was bad, use the default environment */
151 if (gd->env_valid)
152 {
153 c = env_get_char_spec(index);
154 } else {
155 c = default_environment[index];
156 }
157
158 return (c);
159}
160
7c7a23bd
WD		 161#ifdef CONFIG_AMIGAONEG3SE
162uchar env_get_char_memory (int index)
163{
164 DECLARE_GLOBAL_DATA_PTR;
165 uchar retval;
166 enable_nvram();
167 if (gd->env_valid) {
168 retval = ( *((uchar *)(gd->env_addr + index)) );
169 } else {
170 retval = ( default_environment[index] );
171 }
172 disable_nvram();
173 return retval;
174}
175#else
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WD		 176uchar env_get_char_memory (int index)
177{
178 DECLARE_GLOBAL_DATA_PTR;
179
180 if (gd->env_valid) {
181 return ( *((uchar *)(gd->env_addr + index)) );
182 } else {
183 return ( default_environment[index] );
184 }
185}
7c7a23bd 186#endif
05706fdd
WD		 187
188uchar *env_get_addr (int index)
189{
190 DECLARE_GLOBAL_DATA_PTR;
191
192 if (gd->env_valid) {
193 return ( ((uchar *)(gd->env_addr + index)) );
194 } else {
195 return (&default_environment[index]);
196 }
197}
198
199void env_relocate (void)
200{
201 DECLARE_GLOBAL_DATA_PTR;
202
203 DEBUGF ("%s[%d] offset = 0x%lx\n", __FUNCTION__,__LINE__,
204 gd->reloc_off);
205
c7de829c
WD		 206#ifdef CONFIG_AMIGAONEG3SE
207 enable_nvram();
208#endif
209
05706fdd
WD		 210#ifdef ENV_IS_EMBEDDED
211 /*
212 * The environment buffer is embedded with the text segment,
213 * just relocate the environment pointer
214 */
215 env_ptr = (env_t *)((ulong)env_ptr + gd->reloc_off);
216 DEBUGF ("%s[%d] embedded ENV at %p\n", __FUNCTION__,__LINE__,env_ptr);
217#else
218 /*
219 * We must allocate a buffer for the environment
220 */
221 env_ptr = (env_t *)malloc (CFG_ENV_SIZE);
222 DEBUGF ("%s[%d] malloced ENV at %p\n", __FUNCTION__,__LINE__,env_ptr);
223#endif
224
225 /*
226 * After relocation to RAM, we can always use the "memory" functions
227 */
228 env_get_char = env_get_char_memory;
229
230 if (gd->env_valid == 0) {
231#if defined(CONFIG_GTH) || defined(CFG_ENV_IS_NOWHERE) /* Environment not changable */
232 puts ("Using default environment\n\n");
233#else
234 puts ("*** Warning - bad CRC, using default environment\n\n");
235 SHOW_BOOT_PROGRESS (-1);
236#endif
237
238 if (sizeof(default_environment) > ENV_SIZE)
239 {
240 puts ("*** Error - default environment is too large\n\n");
241 return;
242 }
243
244 memset (env_ptr, 0, sizeof(env_t));
245 memcpy (env_ptr->data,
246 default_environment,
247 sizeof(default_environment));
248#ifdef CFG_REDUNDAND_ENVIRONMENT
249 env_ptr->flags = 0xFF;
250#endif
251 env_crc_update ();
252 gd->env_valid = 1;
253 }
254 else {
255 env_relocate_spec ();
256 }
257 gd->env_addr = (ulong)&(env_ptr->data);
c7de829c
WD		 258
259#ifdef CONFIG_AMIGAONEG3SE
260 disable_nvram();
261#endif
05706fdd 262}
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