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1 | /* |
2 | * Copyright 2012 Freescale Semiconductor, Inc. | |
3 | * | |
4 | * See file CREDITS for list of people who contributed to this | |
5 | * project. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License as | |
9 | * published by the Free Software Foundation; either version 2 of | |
10 | * the License, or (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
20 | * MA 02111-1307 USA | |
21 | */ | |
22 | #define _GNU_SOURCE | |
23 | ||
24 | #include "mkimage.h" | |
25 | #include <image.h> | |
26 | #include "pblimage.h" | |
27 | ||
28 | /* | |
29 | * The PBL can load up to 64 bytes at a time, so we split the U-Boot | |
30 | * image into 64 byte chunks. PBL needs a command for each piece, of | |
31 | * the form "81xxxxxx", where "xxxxxx" is the offset. SYS_TEXT_BASE | |
32 | * is 0xFFF80000 for PBL boot, and PBL only cares about low 24-bit, | |
33 | * so it starts from 0x81F80000. | |
34 | */ | |
35 | static uint32_t next_pbl_cmd = 0x81F80000; | |
36 | /* | |
37 | * need to store all bytes in memory for calculating crc32, then write the | |
38 | * bytes to image file for PBL boot. | |
39 | */ | |
40 | static unsigned char mem_buf[600000]; | |
41 | static unsigned char *pmem_buf = mem_buf; | |
42 | static int pbl_size; | |
43 | static char *fname = "Unknown"; | |
44 | static int lineno = -1; | |
45 | static struct pbl_header pblimage_header; | |
46 | ||
47 | static union | |
48 | { | |
49 | char c[4]; | |
50 | unsigned char l; | |
51 | } endian_test = { {'l', '?', '?', 'b'} }; | |
52 | ||
53 | #define ENDIANNESS ((char)endian_test.l) | |
54 | ||
55 | static void generate_pbl_cmd(void) | |
56 | { | |
57 | uint32_t val = next_pbl_cmd; | |
58 | next_pbl_cmd += 0x40; | |
59 | int i; | |
60 | ||
61 | for (i = 3; i >= 0; i--) { | |
62 | *pmem_buf++ = (val >> (i * 8)) & 0xff; | |
63 | pbl_size++; | |
64 | } | |
65 | } | |
66 | ||
67 | static void pbl_fget(size_t size, FILE *stream) | |
68 | { | |
69 | unsigned char c; | |
70 | int c_temp; | |
71 | ||
72 | while (size && (c_temp = fgetc(stream)) != EOF) { | |
73 | c = (unsigned char)c_temp; | |
74 | *pmem_buf++ = c; | |
75 | pbl_size++; | |
76 | size--; | |
77 | } | |
78 | } | |
79 | ||
80 | /* load split u-boot with PBI command 81xxxxxx. */ | |
81 | static void load_uboot(FILE *fp_uboot) | |
82 | { | |
83 | while (next_pbl_cmd < 0x82000000) { | |
84 | generate_pbl_cmd(); | |
85 | pbl_fget(64, fp_uboot); | |
86 | } | |
87 | } | |
88 | ||
89 | static void check_get_hexval(char *token) | |
90 | { | |
91 | uint32_t hexval; | |
92 | int i; | |
93 | ||
94 | if (!sscanf(token, "%x", &hexval)) { | |
95 | printf("Error:%s[%d] - Invalid hex data(%s)\n", fname, | |
96 | lineno, token); | |
97 | exit(EXIT_FAILURE); | |
98 | } | |
99 | for (i = 3; i >= 0; i--) { | |
100 | *pmem_buf++ = (hexval >> (i * 8)) & 0xff; | |
101 | pbl_size++; | |
102 | } | |
103 | } | |
104 | ||
105 | static void pbl_parser(char *name) | |
106 | { | |
107 | FILE *fd = NULL; | |
108 | char *line = NULL; | |
109 | char *token, *saveptr1, *saveptr2; | |
110 | size_t len = 0; | |
111 | ||
112 | fname = name; | |
113 | fd = fopen(name, "r"); | |
114 | if (fd == NULL) { | |
115 | printf("Error:%s - Can't open\n", fname); | |
116 | exit(EXIT_FAILURE); | |
117 | } | |
118 | ||
119 | while ((getline(&line, &len, fd)) > 0) { | |
120 | lineno++; | |
121 | token = strtok_r(line, "\r\n", &saveptr1); | |
122 | /* drop all lines with zero tokens (= empty lines) */ | |
123 | if (token == NULL) | |
124 | continue; | |
125 | for (line = token;; line = NULL) { | |
126 | token = strtok_r(line, " \t", &saveptr2); | |
127 | if (token == NULL) | |
128 | break; | |
129 | /* Drop all text starting with '#' as comments */ | |
130 | if (token[0] == '#') | |
131 | break; | |
132 | check_get_hexval(token); | |
133 | } | |
134 | } | |
135 | if (line) | |
136 | free(line); | |
137 | fclose(fd); | |
138 | } | |
139 | ||
140 | static uint32_t crc_table[256]; | |
141 | ||
142 | static void make_crc_table(void) | |
143 | { | |
144 | uint32_t mask; | |
145 | int i, j; | |
146 | uint32_t poly; /* polynomial exclusive-or pattern */ | |
147 | ||
148 | /* | |
149 | * the polynomial used by PBL is 1 + x1 + x2 + x4 + x5 + x7 + x8 + x10 | |
150 | * + x11 + x12 + x16 + x22 + x23 + x26 + x32. | |
151 | */ | |
152 | poly = 0x04c11db7; | |
153 | ||
154 | for (i = 0; i < 256; i++) { | |
155 | mask = i << 24; | |
156 | for (j = 0; j < 8; j++) { | |
157 | if (mask & 0x80000000) | |
158 | mask = (mask << 1) ^ poly; | |
159 | else | |
160 | mask <<= 1; | |
161 | } | |
162 | crc_table[i] = mask; | |
163 | } | |
164 | } | |
165 | ||
166 | unsigned long pbl_crc32(unsigned long crc, const char *buf, uint32_t len) | |
167 | { | |
168 | uint32_t crc32_val = 0xffffffff; | |
169 | uint32_t xor = 0x0; | |
170 | int i; | |
171 | ||
172 | make_crc_table(); | |
173 | ||
174 | for (i = 0; i < len; i++) | |
175 | crc32_val = (crc32_val << 8) ^ | |
176 | crc_table[(crc32_val >> 24) ^ (*buf++ & 0xff)]; | |
177 | ||
178 | crc32_val = crc32_val ^ xor; | |
179 | if (crc32_val < 0) { | |
180 | crc32_val += 0xffffffff; | |
181 | crc32_val += 1; | |
182 | } | |
183 | return crc32_val; | |
184 | } | |
185 | ||
186 | static uint32_t reverse_byte(uint32_t val) | |
187 | { | |
188 | uint32_t temp; | |
189 | unsigned char *p1; | |
190 | int j; | |
191 | ||
192 | temp = val; | |
193 | p1 = (unsigned char *)&temp; | |
194 | for (j = 3; j >= 0; j--) | |
195 | *p1++ = (val >> (j * 8)) & 0xff; | |
196 | return temp; | |
197 | } | |
198 | ||
199 | /* write end command and crc command to memory. */ | |
200 | static void add_end_cmd(void) | |
201 | { | |
202 | uint32_t pbl_end_cmd[4] = {0x09138000, 0x00000000, | |
203 | 0x091380c0, 0x00000000}; | |
204 | uint32_t crc32_pbl; | |
205 | int i; | |
206 | unsigned char *p = (unsigned char *)&pbl_end_cmd; | |
207 | ||
208 | if (ENDIANNESS == 'l') { | |
209 | for (i = 0; i < 4; i++) | |
210 | pbl_end_cmd[i] = reverse_byte(pbl_end_cmd[i]); | |
211 | } | |
212 | ||
213 | for (i = 0; i < 16; i++) { | |
214 | *pmem_buf++ = *p++; | |
215 | pbl_size++; | |
216 | } | |
217 | ||
218 | /* Add PBI CRC command. */ | |
219 | *pmem_buf++ = 0x08; | |
220 | *pmem_buf++ = 0x13; | |
221 | *pmem_buf++ = 0x80; | |
222 | *pmem_buf++ = 0x40; | |
223 | pbl_size += 4; | |
224 | ||
225 | /* calculated CRC32 and write it to memory. */ | |
226 | crc32_pbl = pbl_crc32(0, (const char *)mem_buf, pbl_size); | |
227 | *pmem_buf++ = (crc32_pbl >> 24) & 0xff; | |
228 | *pmem_buf++ = (crc32_pbl >> 16) & 0xff; | |
229 | *pmem_buf++ = (crc32_pbl >> 8) & 0xff; | |
230 | *pmem_buf++ = (crc32_pbl) & 0xff; | |
231 | pbl_size += 4; | |
232 | ||
233 | if ((pbl_size % 16) != 0) { | |
234 | for (i = 0; i < 8; i++) { | |
235 | *pmem_buf++ = 0x0; | |
236 | pbl_size++; | |
237 | } | |
238 | } | |
239 | if ((pbl_size % 16 != 0)) { | |
240 | printf("Error: Bad size of image file\n"); | |
241 | exit(EXIT_FAILURE); | |
242 | } | |
243 | } | |
244 | ||
245 | void pbl_load_uboot(int ifd, struct mkimage_params *params) | |
246 | { | |
247 | FILE *fp_uboot; | |
248 | int size; | |
249 | ||
250 | /* parse the rcw.cfg file. */ | |
251 | pbl_parser(params->imagename); | |
252 | ||
253 | /* parse the pbi.cfg file. */ | |
254 | pbl_parser(params->imagename2); | |
255 | ||
256 | fp_uboot = fopen(params->datafile, "r"); | |
257 | if (fp_uboot == NULL) { | |
258 | printf("Error: %s open failed\n", params->datafile); | |
259 | exit(EXIT_FAILURE); | |
260 | } | |
261 | ||
262 | load_uboot(fp_uboot); | |
263 | add_end_cmd(); | |
264 | fclose(fp_uboot); | |
265 | lseek(ifd, 0, SEEK_SET); | |
266 | ||
267 | size = pbl_size; | |
268 | if (write(ifd, (const void *)&mem_buf, size) != size) { | |
269 | fprintf(stderr, "Write error on %s: %s\n", | |
270 | params->imagefile, strerror(errno)); | |
271 | exit(EXIT_FAILURE); | |
272 | } | |
273 | } | |
274 | ||
275 | static int pblimage_check_image_types(uint8_t type) | |
276 | { | |
277 | if (type == IH_TYPE_PBLIMAGE) | |
278 | return EXIT_SUCCESS; | |
279 | else | |
280 | return EXIT_FAILURE; | |
281 | } | |
282 | ||
283 | static int pblimage_verify_header(unsigned char *ptr, int image_size, | |
284 | struct mkimage_params *params) | |
285 | { | |
286 | struct pbl_header *pbl_hdr = (struct pbl_header *) ptr; | |
287 | ||
288 | /* Only a few checks can be done: search for magic numbers */ | |
289 | if (ENDIANNESS == 'l') { | |
290 | if (pbl_hdr->preamble != reverse_byte(RCW_PREAMBLE)) | |
291 | return -FDT_ERR_BADSTRUCTURE; | |
292 | ||
293 | if (pbl_hdr->rcwheader != reverse_byte(RCW_HEADER)) | |
294 | return -FDT_ERR_BADSTRUCTURE; | |
295 | } else { | |
296 | if (pbl_hdr->preamble != RCW_PREAMBLE) | |
297 | return -FDT_ERR_BADSTRUCTURE; | |
298 | ||
299 | if (pbl_hdr->rcwheader != RCW_HEADER) | |
300 | return -FDT_ERR_BADSTRUCTURE; | |
301 | } | |
302 | return 0; | |
303 | } | |
304 | ||
305 | static void pblimage_print_header(const void *ptr) | |
306 | { | |
307 | printf("Image Type: Freescale PBL Boot Image\n"); | |
308 | } | |
309 | ||
310 | static void pblimage_set_header(void *ptr, struct stat *sbuf, int ifd, | |
311 | struct mkimage_params *params) | |
312 | { | |
313 | /*nothing need to do, pbl_load_uboot takes care of whole file. */ | |
314 | } | |
315 | ||
316 | /* pblimage parameters */ | |
317 | static struct image_type_params pblimage_params = { | |
318 | .name = "Freescale PBL Boot Image support", | |
319 | .header_size = sizeof(struct pbl_header), | |
320 | .hdr = (void *)&pblimage_header, | |
321 | .check_image_type = pblimage_check_image_types, | |
322 | .verify_header = pblimage_verify_header, | |
323 | .print_header = pblimage_print_header, | |
324 | .set_header = pblimage_set_header, | |
325 | }; | |
326 | ||
327 | void init_pbl_image_type(void) | |
328 | { | |
329 | pbl_size = 0; | |
330 | mkimage_register(&pblimage_params); | |
331 | } |