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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 | #if defined(CONFIG_8xx) | |
44 | #include <mpc8xx.h> | |
45 | #endif | |
46 | #ifdef CONFIG_SYS_HUSH_PARSER | |
47 | #include <hush.h> | |
48 | #endif | |
49 | ||
50 | int | |
51 | autoscript (ulong addr, const char *fit_uname) | |
52 | { | |
53 | ulong len; | |
54 | image_header_t *hdr; | |
55 | ulong *data; | |
56 | char *cmd; | |
57 | int rcode = 0; | |
58 | int verify; | |
59 | #if defined(CONFIG_FIT) | |
60 | const void* fit_hdr; | |
61 | int noffset; | |
62 | const void *fit_data; | |
63 | size_t fit_len; | |
64 | #endif | |
65 | ||
66 | verify = getenv_yesno ("verify"); | |
67 | ||
68 | switch (genimg_get_format ((void *)addr)) { | |
69 | case IMAGE_FORMAT_LEGACY: | |
70 | hdr = (image_header_t *)addr; | |
71 | ||
72 | if (!image_check_magic (hdr)) { | |
73 | puts ("Bad magic number\n"); | |
74 | return 1; | |
75 | } | |
76 | ||
77 | if (!image_check_hcrc (hdr)) { | |
78 | puts ("Bad header crc\n"); | |
79 | return 1; | |
80 | } | |
81 | ||
82 | if (verify) { | |
83 | if (!image_check_dcrc (hdr)) { | |
84 | puts ("Bad data crc\n"); | |
85 | return 1; | |
86 | } | |
87 | } | |
88 | ||
89 | if (!image_check_type (hdr, IH_TYPE_SCRIPT)) { | |
90 | puts ("Bad image type\n"); | |
91 | return 1; | |
92 | } | |
93 | ||
94 | /* get length of script */ | |
95 | data = (ulong *)image_get_data (hdr); | |
96 | ||
97 | if ((len = uimage_to_cpu (*data)) == 0) { | |
98 | puts ("Empty Script\n"); | |
99 | return 1; | |
100 | } | |
101 | ||
102 | /* | |
103 | * scripts are just multi-image files with one component, seek | |
104 | * past the zero-terminated sequence of image lengths to get | |
105 | * to the actual image data | |
106 | */ | |
107 | while (*data++); | |
108 | break; | |
109 | #if defined(CONFIG_FIT) | |
110 | case IMAGE_FORMAT_FIT: | |
111 | if (fit_uname == NULL) { | |
112 | puts ("No FIT subimage unit name\n"); | |
113 | return 1; | |
114 | } | |
115 | ||
116 | fit_hdr = (const void *)addr; | |
117 | if (!fit_check_format (fit_hdr)) { | |
118 | puts ("Bad FIT image format\n"); | |
119 | return 1; | |
120 | } | |
121 | ||
122 | /* get script component image node offset */ | |
123 | noffset = fit_image_get_node (fit_hdr, fit_uname); | |
124 | if (noffset < 0) { | |
125 | printf ("Can't find '%s' FIT subimage\n", fit_uname); | |
126 | return 1; | |
127 | } | |
128 | ||
129 | if (!fit_image_check_type (fit_hdr, noffset, IH_TYPE_SCRIPT)) { | |
130 | puts ("Not a image image\n"); | |
131 | return 1; | |
132 | } | |
133 | ||
134 | /* verify integrity */ | |
135 | if (verify) { | |
136 | if (!fit_image_check_hashes (fit_hdr, noffset)) { | |
137 | puts ("Bad Data Hash\n"); | |
138 | return 1; | |
139 | } | |
140 | } | |
141 | ||
142 | /* get script subimage data address and length */ | |
143 | if (fit_image_get_data (fit_hdr, noffset, &fit_data, &fit_len)) { | |
144 | puts ("Could not find script subimage data\n"); | |
145 | return 1; | |
146 | } | |
147 | ||
148 | data = (ulong *)fit_data; | |
149 | len = (ulong)fit_len; | |
150 | break; | |
151 | #endif | |
152 | default: | |
153 | puts ("Wrong image format for autoscript\n"); | |
154 | return 1; | |
155 | } | |
156 | ||
157 | debug ("** Script length: %ld\n", len); | |
158 | ||
159 | if ((cmd = malloc (len + 1)) == NULL) { | |
160 | return 1; | |
161 | } | |
162 | ||
163 | /* make sure cmd is null terminated */ | |
164 | memmove (cmd, (char *)data, len); | |
165 | *(cmd + len) = 0; | |
166 | ||
167 | #ifdef CONFIG_SYS_HUSH_PARSER /*?? */ | |
168 | rcode = parse_string_outer (cmd, FLAG_PARSE_SEMICOLON); | |
169 | #else | |
170 | { | |
171 | char *line = cmd; | |
172 | char *next = cmd; | |
173 | ||
174 | /* | |
175 | * break into individual lines, | |
176 | * and execute each line; | |
177 | * terminate on error. | |
178 | */ | |
179 | while (*next) { | |
180 | if (*next == '\n') { | |
181 | *next = '\0'; | |
182 | /* run only non-empty commands */ | |
183 | if (*line) { | |
184 | debug ("** exec: \"%s\"\n", | |
185 | line); | |
186 | if (run_command (line, 0) < 0) { | |
187 | rcode = 1; | |
188 | break; | |
189 | } | |
190 | } | |
191 | line = next + 1; | |
192 | } | |
193 | ++next; | |
194 | } | |
195 | if (rcode == 0 && *line) | |
196 | rcode = (run_command(line, 0) >= 0); | |
197 | } | |
198 | #endif | |
199 | free (cmd); | |
200 | return rcode; | |
201 | } | |
202 | ||
203 | /**************************************************/ | |
204 | #if defined(CONFIG_CMD_AUTOSCRIPT) | |
205 | int | |
206 | do_autoscript (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) | |
207 | { | |
208 | ulong addr; | |
209 | int rcode; | |
210 | const char *fit_uname = NULL; | |
211 | ||
212 | /* Find script image */ | |
213 | if (argc < 2) { | |
214 | addr = CONFIG_SYS_LOAD_ADDR; | |
215 | debug ("* autoscr: default load address = 0x%08lx\n", addr); | |
216 | #if defined(CONFIG_FIT) | |
217 | } else if (fit_parse_subimage (argv[1], load_addr, &addr, &fit_uname)) { | |
218 | debug ("* autoscr: subimage '%s' from FIT image at 0x%08lx\n", | |
219 | fit_uname, addr); | |
220 | #endif | |
221 | } else { | |
222 | addr = simple_strtoul(argv[1], NULL, 16); | |
223 | debug ("* autoscr: cmdline image address = 0x%08lx\n", addr); | |
224 | } | |
225 | ||
226 | printf ("## Executing script at %08lx\n", addr); | |
227 | rcode = autoscript (addr, fit_uname); | |
228 | return rcode; | |
229 | } | |
230 | ||
231 | U_BOOT_CMD( | |
232 | autoscr, 2, 0, do_autoscript, | |
233 | "autoscr - run script from memory\n", | |
234 | "[addr] - run script starting at addr" | |
235 | " - A valid autoscr header must be present\n" | |
236 | #if defined(CONFIG_FIT) | |
237 | "For FIT format uImage addr must include subimage\n" | |
238 | "unit name in the form of addr:<subimg_uname>\n" | |
239 | #endif | |
240 | ); | |
241 | #endif |