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affae2bf WD |
1 | /* |
2 | * (C) Copyright 2001 | |
3 | * Wave 7 Optics, Inc. | |
4 | * | |
5 | * See file CREDITS for list of people who contributed to this | |
6 | * project. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation; either version 2 of | |
11 | * the License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
21 | * MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | #include <common.h> | |
25 | #include <config.h> | |
26 | #include <command.h> | |
affae2bf WD |
27 | |
28 | /* | |
29 | * FIXME: Add code to test image and it's header. | |
30 | */ | |
8bde7f77 WD |
31 | extern int valid_elf_image (unsigned long addr); |
32 | ||
affae2bf WD |
33 | static int |
34 | image_check(ulong addr) | |
35 | { | |
36 | return valid_elf_image(addr); | |
37 | } | |
38 | ||
39 | void | |
40 | init_fsboot(void) | |
41 | { | |
42 | char *envp; | |
43 | ulong loadaddr; | |
44 | ulong testaddr; | |
45 | ulong alt_loadaddr; | |
46 | char buf[9]; | |
47 | ||
48 | /* | |
49 | * Get test image address | |
50 | */ | |
51 | if ((envp = getenv("testaddr")) != NULL) | |
52 | testaddr = simple_strtoul(envp, NULL, 16); | |
53 | else | |
54 | testaddr = -1; | |
55 | ||
56 | /* | |
57 | * Are we going to test boot and image? | |
58 | */ | |
59 | if ((testaddr != -1) && image_check(testaddr)) { | |
60 | ||
61 | /* Set alt_loadaddr */ | |
62 | alt_loadaddr = testaddr; | |
63 | sprintf(buf, "%lX", alt_loadaddr); | |
64 | setenv("alt_loadaddr", buf); | |
65 | ||
66 | /* Clear test_addr */ | |
67 | setenv("testaddr", NULL); | |
68 | ||
69 | /* | |
70 | * Save current environment with alt_loadaddr, | |
71 | * and cleared testaddr. | |
72 | */ | |
73 | saveenv(); | |
74 | ||
75 | /* | |
76 | * Setup temporary loadaddr to alt_loadaddr | |
77 | * XXX - DO NOT SAVE ENVIRONMENT! | |
78 | */ | |
79 | loadaddr = alt_loadaddr; | |
80 | sprintf(buf, "%lX", loadaddr); | |
81 | setenv("loadaddr", buf); | |
82 | ||
83 | } else { /* Normal boot */ | |
84 | setenv("alt_loadaddr", NULL); /* Clear alt_loadaddr */ | |
85 | setenv("testaddr", NULL); /* Clear testaddr */ | |
86 | saveenv(); | |
87 | } | |
88 | ||
89 | return; | |
90 | } |