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d0dd1077 WD |
1 | /* |
2 | * (C) Copyright 2001 | |
3 | * Kyle Harris, kharris@nexus-tech.net | |
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 | /* | |
25 | * autoscript allows a remote host to download a command file and, | |
26 | * optionally, binary data for automatically updating the target. For | |
27 | * example, you create a new kernel image and want the user to be | |
28 | * able to simply download the image and the machine does the rest. | |
29 | * The kernel image is postprocessed with mkimage, which creates an | |
30 | * image with a script file prepended. If enabled, autoscript will | |
31 | * verify the script and contents of the download and execute the | |
32 | * script portion. This would be responsible for erasing flash, | |
33 | * copying the new image, and rebooting the machine. | |
34 | */ | |
35 | ||
36 | /* #define DEBUG */ | |
37 | ||
38 | #include <common.h> | |
39 | #include <command.h> | |
40 | #include <image.h> | |
41 | #include <malloc.h> | |
42 | #include <asm/byteorder.h> | |
43 | #include <cmd_boot.h> | |
44 | #include <cmd_autoscript.h> | |
45 | #if defined(CONFIG_8xx) | |
46 | #include <mpc8xx.h> | |
47 | #endif | |
48 | #ifdef CFG_HUSH_PARSER | |
49 | #include <hush.h> | |
50 | #endif | |
51 | ||
52 | #if defined(CONFIG_AUTOSCRIPT) || \ | |
53 | (CONFIG_COMMANDS & CFG_CMD_AUTOSCRIPT) | |
54 | ||
55 | extern image_header_t header; /* from cmd_bootm.c */ | |
56 | int | |
57 | autoscript (ulong addr) | |
58 | { | |
59 | ulong crc, data, len; | |
60 | image_header_t *hdr = &header; | |
61 | ulong *len_ptr; | |
62 | char *cmd; | |
63 | int rcode = 0; | |
64 | int verify; | |
65 | ||
66 | cmd = getenv ("verify"); | |
67 | verify = (cmd && (*cmd == 'n')) ? 0 : 1; | |
68 | ||
69 | ||
70 | memmove (hdr, (char *)addr, sizeof(image_header_t)); | |
71 | ||
72 | if (ntohl(hdr->ih_magic) != IH_MAGIC) { | |
73 | printf ("Bad magic number\n"); | |
74 | return 1; | |
75 | } | |
76 | ||
77 | crc = ntohl(hdr->ih_hcrc); | |
78 | hdr->ih_hcrc = 0; | |
79 | len = sizeof (image_header_t); | |
80 | data = (ulong)hdr; | |
81 | if (crc32(0, (char *)data, len) != crc) { | |
82 | printf ("Bad header crc\n"); | |
83 | return 1; | |
84 | } | |
85 | ||
86 | data = addr + sizeof(image_header_t); | |
87 | len = ntohl(hdr->ih_size); | |
88 | ||
89 | if (verify) { | |
90 | if (crc32(0, (char *)data, len) != ntohl(hdr->ih_dcrc)) { | |
91 | printf ("Bad data crc\n"); | |
92 | return 1; | |
93 | } | |
94 | } | |
95 | ||
96 | if (hdr->ih_type != IH_TYPE_SCRIPT) { | |
97 | printf ("Bad image type\n"); | |
98 | return 1; | |
99 | } | |
100 | ||
101 | /* get length of script */ | |
102 | len_ptr = (ulong *)data; | |
103 | ||
104 | if ((len = ntohl(*len_ptr)) == 0) { | |
105 | printf ("Empty Script\n"); | |
106 | return 1; | |
107 | } | |
108 | ||
699b13a6 | 109 | debug ("** Script length: %ld\n", len); |
d0dd1077 WD |
110 | |
111 | if ((cmd = malloc (len + 1)) == NULL) { | |
112 | return 1; | |
113 | } | |
114 | ||
115 | while (*len_ptr++); | |
116 | ||
117 | /* make sure cmd is null terminated */ | |
118 | memmove (cmd, (char *)len_ptr, len); | |
119 | *(cmd + len) = 0; | |
120 | ||
121 | #ifdef CFG_HUSH_PARSER | |
122 | rcode = parse_string_outer (cmd, FLAG_PARSE_SEMICOLON); | |
123 | #else | |
124 | { | |
125 | char *line = cmd; | |
126 | char *next = cmd; | |
127 | ||
128 | /* | |
129 | * break into individual lines, | |
130 | * and execute each line; | |
131 | * terminate on error. | |
132 | */ | |
133 | while (*next) { | |
134 | if (*next == '\n') { | |
135 | *next = '\0'; | |
136 | /* run only non-empty commands */ | |
137 | if ((next - line) > 1) { | |
138 | debug ("** exec: \"%s\"\n", | |
139 | line); | |
140 | if (run_command (line, 0) < 0) { | |
141 | rcode = 1; | |
142 | break; | |
143 | } | |
144 | } | |
145 | line = next + 1; | |
146 | } | |
147 | ++next; | |
148 | } | |
149 | } | |
150 | #endif | |
151 | free (cmd); | |
152 | return rcode; | |
153 | } | |
154 | ||
155 | #endif /* CONFIG_AUTOSCRIPT || CFG_CMD_AUTOSCRIPT */ | |
156 | ||
157 | #if (CONFIG_COMMANDS & CFG_CMD_AUTOSCRIPT) | |
158 | int | |
159 | do_autoscript (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) | |
160 | { | |
161 | ulong addr; | |
162 | int rcode; | |
163 | ||
164 | if (argc < 2) { | |
165 | addr = CFG_LOAD_ADDR; | |
166 | } else { | |
167 | addr = simple_strtoul (argv[1],0,16); | |
168 | } | |
169 | ||
170 | printf ("## Executing script at %08lx\n",addr); | |
171 | rcode = autoscript (addr); | |
172 | return rcode; | |
173 | } | |
174 | #endif /* CFG_CMD_AUTOSCRIPT */ |