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5d898a00 SX |
1 | /* |
2 | * Copyright 2012 Freescale Semiconductor, Inc. | |
3 | * | |
1a459660 | 4 | * SPDX-License-Identifier: GPL-2.0+ |
5d898a00 | 5 | */ |
f86ed6a8 | 6 | #include "imagetool.h" |
5d898a00 SX |
7 | #include <image.h> |
8 | #include "pblimage.h" | |
abbc67ee | 9 | #include "pbl_crc32.h" |
5d898a00 SX |
10 | |
11 | /* | |
0d3efd80 | 12 | * Initialize to an invalid value. |
5d898a00 | 13 | */ |
0d3efd80 | 14 | static uint32_t next_pbl_cmd = 0x82000000; |
5d898a00 SX |
15 | /* |
16 | * need to store all bytes in memory for calculating crc32, then write the | |
17 | * bytes to image file for PBL boot. | |
18 | */ | |
0d3efd80 | 19 | static unsigned char mem_buf[1000000]; |
5d898a00 SX |
20 | static unsigned char *pmem_buf = mem_buf; |
21 | static int pbl_size; | |
22 | static char *fname = "Unknown"; | |
23 | static int lineno = -1; | |
24 | static struct pbl_header pblimage_header; | |
25 | ||
26 | static union | |
27 | { | |
28 | char c[4]; | |
29 | unsigned char l; | |
30 | } endian_test = { {'l', '?', '?', 'b'} }; | |
31 | ||
32 | #define ENDIANNESS ((char)endian_test.l) | |
33 | ||
0d3efd80 CP |
34 | /* |
35 | * The PBL can load up to 64 bytes at a time, so we split the U-Boot | |
36 | * image into 64 byte chunks. PBL needs a command for each piece, of | |
37 | * the form "81xxxxxx", where "xxxxxx" is the offset. Calculate the | |
38 | * start offset by subtracting the size of the u-boot image from the | |
39 | * top of the allowable 24-bit range. | |
40 | */ | |
41 | static void init_next_pbl_cmd(FILE *fp_uboot) | |
42 | { | |
43 | struct stat st; | |
44 | int fd = fileno(fp_uboot); | |
45 | ||
46 | if (fstat(fd, &st) == -1) { | |
47 | printf("Error: Could not determine u-boot image size. %s\n", | |
48 | strerror(errno)); | |
49 | exit(EXIT_FAILURE); | |
50 | } | |
51 | ||
52 | next_pbl_cmd = 0x82000000 - st.st_size; | |
53 | } | |
54 | ||
5d898a00 SX |
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 | { | |
0d3efd80 | 83 | init_next_pbl_cmd(fp_uboot); |
5d898a00 SX |
84 | while (next_pbl_cmd < 0x82000000) { |
85 | generate_pbl_cmd(); | |
86 | pbl_fget(64, fp_uboot); | |
87 | } | |
88 | } | |
89 | ||
90 | static void check_get_hexval(char *token) | |
91 | { | |
92 | uint32_t hexval; | |
93 | int i; | |
94 | ||
95 | if (!sscanf(token, "%x", &hexval)) { | |
96 | printf("Error:%s[%d] - Invalid hex data(%s)\n", fname, | |
97 | lineno, token); | |
98 | exit(EXIT_FAILURE); | |
99 | } | |
100 | for (i = 3; i >= 0; i--) { | |
101 | *pmem_buf++ = (hexval >> (i * 8)) & 0xff; | |
102 | pbl_size++; | |
103 | } | |
104 | } | |
105 | ||
106 | static void pbl_parser(char *name) | |
107 | { | |
108 | FILE *fd = NULL; | |
109 | char *line = NULL; | |
110 | char *token, *saveptr1, *saveptr2; | |
111 | size_t len = 0; | |
112 | ||
113 | fname = name; | |
114 | fd = fopen(name, "r"); | |
115 | if (fd == NULL) { | |
116 | printf("Error:%s - Can't open\n", fname); | |
117 | exit(EXIT_FAILURE); | |
118 | } | |
119 | ||
120 | while ((getline(&line, &len, fd)) > 0) { | |
121 | lineno++; | |
122 | token = strtok_r(line, "\r\n", &saveptr1); | |
123 | /* drop all lines with zero tokens (= empty lines) */ | |
124 | if (token == NULL) | |
125 | continue; | |
126 | for (line = token;; line = NULL) { | |
127 | token = strtok_r(line, " \t", &saveptr2); | |
128 | if (token == NULL) | |
129 | break; | |
130 | /* Drop all text starting with '#' as comments */ | |
131 | if (token[0] == '#') | |
132 | break; | |
133 | check_get_hexval(token); | |
134 | } | |
135 | } | |
136 | if (line) | |
137 | free(line); | |
138 | fclose(fd); | |
139 | } | |
140 | ||
5d898a00 SX |
141 | static uint32_t reverse_byte(uint32_t val) |
142 | { | |
143 | uint32_t temp; | |
144 | unsigned char *p1; | |
145 | int j; | |
146 | ||
147 | temp = val; | |
148 | p1 = (unsigned char *)&temp; | |
149 | for (j = 3; j >= 0; j--) | |
150 | *p1++ = (val >> (j * 8)) & 0xff; | |
151 | return temp; | |
152 | } | |
153 | ||
154 | /* write end command and crc command to memory. */ | |
155 | static void add_end_cmd(void) | |
156 | { | |
157 | uint32_t pbl_end_cmd[4] = {0x09138000, 0x00000000, | |
158 | 0x091380c0, 0x00000000}; | |
159 | uint32_t crc32_pbl; | |
160 | int i; | |
161 | unsigned char *p = (unsigned char *)&pbl_end_cmd; | |
162 | ||
163 | if (ENDIANNESS == 'l') { | |
164 | for (i = 0; i < 4; i++) | |
165 | pbl_end_cmd[i] = reverse_byte(pbl_end_cmd[i]); | |
166 | } | |
167 | ||
168 | for (i = 0; i < 16; i++) { | |
169 | *pmem_buf++ = *p++; | |
170 | pbl_size++; | |
171 | } | |
172 | ||
173 | /* Add PBI CRC command. */ | |
174 | *pmem_buf++ = 0x08; | |
175 | *pmem_buf++ = 0x13; | |
176 | *pmem_buf++ = 0x80; | |
177 | *pmem_buf++ = 0x40; | |
178 | pbl_size += 4; | |
179 | ||
180 | /* calculated CRC32 and write it to memory. */ | |
181 | crc32_pbl = pbl_crc32(0, (const char *)mem_buf, pbl_size); | |
182 | *pmem_buf++ = (crc32_pbl >> 24) & 0xff; | |
183 | *pmem_buf++ = (crc32_pbl >> 16) & 0xff; | |
184 | *pmem_buf++ = (crc32_pbl >> 8) & 0xff; | |
185 | *pmem_buf++ = (crc32_pbl) & 0xff; | |
186 | pbl_size += 4; | |
187 | ||
188 | if ((pbl_size % 16) != 0) { | |
189 | for (i = 0; i < 8; i++) { | |
190 | *pmem_buf++ = 0x0; | |
191 | pbl_size++; | |
192 | } | |
193 | } | |
194 | if ((pbl_size % 16 != 0)) { | |
195 | printf("Error: Bad size of image file\n"); | |
196 | exit(EXIT_FAILURE); | |
197 | } | |
198 | } | |
199 | ||
f86ed6a8 | 200 | void pbl_load_uboot(int ifd, struct image_tool_params *params) |
5d898a00 SX |
201 | { |
202 | FILE *fp_uboot; | |
203 | int size; | |
204 | ||
205 | /* parse the rcw.cfg file. */ | |
206 | pbl_parser(params->imagename); | |
207 | ||
208 | /* parse the pbi.cfg file. */ | |
209 | pbl_parser(params->imagename2); | |
210 | ||
211 | fp_uboot = fopen(params->datafile, "r"); | |
212 | if (fp_uboot == NULL) { | |
213 | printf("Error: %s open failed\n", params->datafile); | |
214 | exit(EXIT_FAILURE); | |
215 | } | |
216 | ||
217 | load_uboot(fp_uboot); | |
218 | add_end_cmd(); | |
219 | fclose(fp_uboot); | |
220 | lseek(ifd, 0, SEEK_SET); | |
221 | ||
222 | size = pbl_size; | |
223 | if (write(ifd, (const void *)&mem_buf, size) != size) { | |
224 | fprintf(stderr, "Write error on %s: %s\n", | |
225 | params->imagefile, strerror(errno)); | |
226 | exit(EXIT_FAILURE); | |
227 | } | |
228 | } | |
229 | ||
230 | static int pblimage_check_image_types(uint8_t type) | |
231 | { | |
232 | if (type == IH_TYPE_PBLIMAGE) | |
233 | return EXIT_SUCCESS; | |
234 | else | |
235 | return EXIT_FAILURE; | |
236 | } | |
237 | ||
238 | static int pblimage_verify_header(unsigned char *ptr, int image_size, | |
f86ed6a8 | 239 | struct image_tool_params *params) |
5d898a00 SX |
240 | { |
241 | struct pbl_header *pbl_hdr = (struct pbl_header *) ptr; | |
242 | ||
243 | /* Only a few checks can be done: search for magic numbers */ | |
244 | if (ENDIANNESS == 'l') { | |
245 | if (pbl_hdr->preamble != reverse_byte(RCW_PREAMBLE)) | |
246 | return -FDT_ERR_BADSTRUCTURE; | |
247 | ||
248 | if (pbl_hdr->rcwheader != reverse_byte(RCW_HEADER)) | |
249 | return -FDT_ERR_BADSTRUCTURE; | |
250 | } else { | |
251 | if (pbl_hdr->preamble != RCW_PREAMBLE) | |
252 | return -FDT_ERR_BADSTRUCTURE; | |
253 | ||
254 | if (pbl_hdr->rcwheader != RCW_HEADER) | |
255 | return -FDT_ERR_BADSTRUCTURE; | |
256 | } | |
257 | return 0; | |
258 | } | |
259 | ||
260 | static void pblimage_print_header(const void *ptr) | |
261 | { | |
262 | printf("Image Type: Freescale PBL Boot Image\n"); | |
263 | } | |
264 | ||
265 | static void pblimage_set_header(void *ptr, struct stat *sbuf, int ifd, | |
f86ed6a8 | 266 | struct image_tool_params *params) |
5d898a00 SX |
267 | { |
268 | /*nothing need to do, pbl_load_uboot takes care of whole file. */ | |
269 | } | |
270 | ||
271 | /* pblimage parameters */ | |
272 | static struct image_type_params pblimage_params = { | |
273 | .name = "Freescale PBL Boot Image support", | |
274 | .header_size = sizeof(struct pbl_header), | |
275 | .hdr = (void *)&pblimage_header, | |
276 | .check_image_type = pblimage_check_image_types, | |
277 | .verify_header = pblimage_verify_header, | |
278 | .print_header = pblimage_print_header, | |
279 | .set_header = pblimage_set_header, | |
280 | }; | |
281 | ||
282 | void init_pbl_image_type(void) | |
283 | { | |
284 | pbl_size = 0; | |
f86ed6a8 | 285 | register_image_type(&pblimage_params); |
5d898a00 | 286 | } |