1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2012-2014 Freescale Semiconductor, Inc.
4 */
5 #include "imagetool.h"
6 #include <image.h>
7 #include "pblimage.h"
8 #include "pbl_crc32.h"
9 #include <u-boot/crc.h>
10
11 #define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
12 #define PBL_ACS_CONT_CMD 0x81000000
13 #define PBL_ADDR_24BIT_MASK 0x00ffffff
14
15 /*
16 * Initialize to an invalid value.
17 */
18 static uint32_t next_pbl_cmd = 0x82000000;
19 /*
20 * need to store all bytes in memory for calculating crc32, then write the
21 * bytes to image file for PBL boot.
22 */
23 static unsigned char mem_buf[1000000];
24 static unsigned char *pmem_buf = mem_buf;
25 static int pbl_size;
26 static char *fname = "Unknown";
27 static int lineno = -1;
28 static struct pbl_header pblimage_header;
29 static int uboot_size;
30 static int arch_flag;
31
32 static uint32_t pbl_cmd_initaddr;
33 static uint32_t pbi_crc_cmd1;
34 static uint32_t pbi_crc_cmd2;
35 static uint32_t pbl_end_cmd[4];
36
37 static union
38 {
39 char c[4];
40 unsigned char l;
41 } endian_test = { {'l', '?', '?', 'b'} };
42
43 #define ENDIANNESS ((char)endian_test.l)
44
45 /*
46 * The PBL can load up to 64 bytes at a time, so we split the U-Boot
47 * image into 64 byte chunks. PBL needs a command for each piece, of
48 * the form "81xxxxxx", where "xxxxxx" is the offset. Calculate the
49 * start offset by subtracting the size of the u-boot image from the
50 * top of the allowable 24-bit range.
51 */
generate_pbl_cmd(void)52 static void generate_pbl_cmd(void)
53 {
54 uint32_t val = next_pbl_cmd;
55 next_pbl_cmd += 0x40;
56 int i;
57
58 for (i = 3; i >= 0; i--) {
59 *pmem_buf++ = (val >> (i * 8)) & 0xff;
60 pbl_size++;
61 }
62 }
63
pbl_fget(size_t size,FILE * stream)64 static void pbl_fget(size_t size, FILE *stream)
65 {
66 unsigned char c = 0xff;
67 int c_temp;
68
69 while (size) {
70 c_temp = fgetc(stream);
71 if (c_temp != EOF)
72 c = (unsigned char)c_temp;
73 else if ((c_temp == EOF) && (arch_flag == IH_ARCH_ARM))
74 c = 0xff;
75 *pmem_buf++ = c;
76 pbl_size++;
77 size--;
78 }
79 }
80
81 /* load split u-boot with PBI command 81xxxxxx. */
load_uboot(FILE * fp_uboot)82 static void load_uboot(FILE *fp_uboot)
83 {
84 next_pbl_cmd = pbl_cmd_initaddr - uboot_size;
85 while (next_pbl_cmd < pbl_cmd_initaddr) {
86 generate_pbl_cmd();
87 pbl_fget(64, fp_uboot);
88 }
89 }
90
check_get_hexval(char * token)91 static void check_get_hexval(char *token)
92 {
93 uint32_t hexval;
94 int i;
95
96 if (!sscanf(token, "%x", &hexval)) {
97 printf("Error:%s[%d] - Invalid hex data(%s)\n", fname,
98 lineno, token);
99 exit(EXIT_FAILURE);
100 }
101 for (i = 3; i >= 0; i--) {
102 *pmem_buf++ = (hexval >> (i * 8)) & 0xff;
103 pbl_size++;
104 }
105 }
106
pbl_parser(char * name)107 static void pbl_parser(char *name)
108 {
109 FILE *fd = NULL;
110 char *line = NULL;
111 char *token, *saveptr1, *saveptr2;
112 size_t len = 0;
113
114 fname = name;
115 fd = fopen(name, "r");
116 if (fd == NULL) {
117 printf("Error:%s - Can't open\n", fname);
118 exit(EXIT_FAILURE);
119 }
120
121 while ((getline(&line, &len, fd)) > 0) {
122 lineno++;
123 token = strtok_r(line, "\r\n", &saveptr1);
124 /* drop all lines with zero tokens (= empty lines) */
125 if (token == NULL)
126 continue;
127 for (line = token;; line = NULL) {
128 token = strtok_r(line, " \t", &saveptr2);
129 if (token == NULL)
130 break;
131 /* Drop all text starting with '#' as comments */
132 if (token[0] == '#')
133 break;
134 check_get_hexval(token);
135 }
136 }
137 if (line)
138 free(line);
139 fclose(fd);
140 }
141
reverse_byte(uint32_t val)142 static uint32_t reverse_byte(uint32_t val)
143 {
144 uint32_t temp;
145 unsigned char *p1;
146 int j;
147
148 temp = val;
149 p1 = (unsigned char *)&temp;
150 for (j = 3; j >= 0; j--)
151 *p1++ = (val >> (j * 8)) & 0xff;
152 return temp;
153 }
154
155 /* write end command and crc command to memory. */
add_end_cmd(void)156 static void add_end_cmd(void)
157 {
158 uint32_t crc32_pbl;
159 int i;
160 unsigned char *p = (unsigned char *)&pbl_end_cmd;
161
162 if (ENDIANNESS == 'l') {
163 for (i = 0; i < 4; i++)
164 pbl_end_cmd[i] = reverse_byte(pbl_end_cmd[i]);
165 }
166
167 for (i = 0; i < 16; i++) {
168 *pmem_buf++ = *p++;
169 pbl_size++;
170 }
171
172 /* Add PBI CRC command. */
173 *pmem_buf++ = 0x08;
174 *pmem_buf++ = pbi_crc_cmd1;
175 *pmem_buf++ = pbi_crc_cmd2;
176 *pmem_buf++ = 0x40;
177 pbl_size += 4;
178
179 /* calculated CRC32 and write it to memory. */
180 crc32_pbl = pbl_crc32(0, (const char *)mem_buf, pbl_size);
181 *pmem_buf++ = (crc32_pbl >> 24) & 0xff;
182 *pmem_buf++ = (crc32_pbl >> 16) & 0xff;
183 *pmem_buf++ = (crc32_pbl >> 8) & 0xff;
184 *pmem_buf++ = (crc32_pbl) & 0xff;
185 pbl_size += 4;
186 }
187
pbl_load_uboot(int ifd,struct image_tool_params * params)188 void pbl_load_uboot(int ifd, struct image_tool_params *params)
189 {
190 FILE *fp_uboot;
191 int size;
192
193 /* parse the rcw.cfg file. */
194 pbl_parser(params->imagename);
195
196 /* parse the pbi.cfg file. */
197 if (params->imagename2[0] != '\0')
198 pbl_parser(params->imagename2);
199
200 if (params->datafile) {
201 fp_uboot = fopen(params->datafile, "r");
202 if (fp_uboot == NULL) {
203 printf("Error: %s open failed\n", params->datafile);
204 exit(EXIT_FAILURE);
205 }
206
207 load_uboot(fp_uboot);
208 fclose(fp_uboot);
209 }
210 add_end_cmd();
211 lseek(ifd, 0, SEEK_SET);
212
213 size = pbl_size;
214 if (write(ifd, (const void *)&mem_buf, size) != size) {
215 fprintf(stderr, "Write error on %s: %s\n",
216 params->imagefile, strerror(errno));
217 exit(EXIT_FAILURE);
218 }
219 }
220
pblimage_check_image_types(uint8_t type)221 static int pblimage_check_image_types(uint8_t type)
222 {
223 if (type == IH_TYPE_PBLIMAGE)
224 return EXIT_SUCCESS;
225 else
226 return EXIT_FAILURE;
227 }
228
pblimage_verify_header(unsigned char * ptr,int image_size,struct image_tool_params * params)229 static int pblimage_verify_header(unsigned char *ptr, int image_size,
230 struct image_tool_params *params)
231 {
232 struct pbl_header *pbl_hdr = (struct pbl_header *) ptr;
233
234 /* Only a few checks can be done: search for magic numbers */
235 if (ENDIANNESS == 'l') {
236 if (pbl_hdr->preamble != reverse_byte(RCW_PREAMBLE))
237 return -FDT_ERR_BADSTRUCTURE;
238
239 if (pbl_hdr->rcwheader != reverse_byte(RCW_HEADER))
240 return -FDT_ERR_BADSTRUCTURE;
241 } else {
242 if (pbl_hdr->preamble != RCW_PREAMBLE)
243 return -FDT_ERR_BADSTRUCTURE;
244
245 if (pbl_hdr->rcwheader != RCW_HEADER)
246 return -FDT_ERR_BADSTRUCTURE;
247 }
248 return 0;
249 }
250
pblimage_print_header(const void * ptr)251 static void pblimage_print_header(const void *ptr)
252 {
253 printf("Image Type: Freescale PBL Boot Image\n");
254 }
255
pblimage_set_header(void * ptr,struct stat * sbuf,int ifd,struct image_tool_params * params)256 static void pblimage_set_header(void *ptr, struct stat *sbuf, int ifd,
257 struct image_tool_params *params)
258 {
259 /*nothing need to do, pbl_load_uboot takes care of whole file. */
260 }
261
pblimage_check_params(struct image_tool_params * params)262 int pblimage_check_params(struct image_tool_params *params)
263 {
264 FILE *fp_uboot;
265 int fd;
266 struct stat st;
267
268 if (!params)
269 return EXIT_FAILURE;
270
271 if (params->datafile) {
272 fp_uboot = fopen(params->datafile, "r");
273 if (fp_uboot == NULL) {
274 printf("Error: %s open failed\n", params->datafile);
275 exit(EXIT_FAILURE);
276 }
277 fd = fileno(fp_uboot);
278
279 if (fstat(fd, &st) == -1) {
280 printf("Error: Could not determine u-boot image size. %s\n",
281 strerror(errno));
282 exit(EXIT_FAILURE);
283 }
284
285 /* For the variable size, pad it to 64 byte boundary */
286 uboot_size = roundup(st.st_size, 64);
287 fclose(fp_uboot);
288 }
289
290 if (params->arch == IH_ARCH_ARM) {
291 arch_flag = IH_ARCH_ARM;
292 pbi_crc_cmd1 = 0x61;
293 pbi_crc_cmd2 = 0;
294 pbl_cmd_initaddr = params->addr & PBL_ADDR_24BIT_MASK;
295 pbl_cmd_initaddr |= PBL_ACS_CONT_CMD;
296 pbl_cmd_initaddr += uboot_size;
297 pbl_end_cmd[0] = 0x09610000;
298 pbl_end_cmd[1] = 0x00000000;
299 pbl_end_cmd[2] = 0x096100c0;
300 pbl_end_cmd[3] = 0x00000000;
301 } else if (params->arch == IH_ARCH_PPC) {
302 arch_flag = IH_ARCH_PPC;
303 pbi_crc_cmd1 = 0x13;
304 pbi_crc_cmd2 = 0x80;
305 pbl_cmd_initaddr = 0x82000000;
306 pbl_end_cmd[0] = 0x091380c0;
307 pbl_end_cmd[1] = 0x00000000;
308 pbl_end_cmd[2] = 0x091380c0;
309 pbl_end_cmd[3] = 0x00000000;
310 }
311
312 next_pbl_cmd = pbl_cmd_initaddr;
313 return 0;
314 };
315
316 /* pblimage parameters */
317 U_BOOT_IMAGE_TYPE(
318 pblimage,
319 "Freescale PBL Boot Image support",
320 sizeof(struct pbl_header),
321 (void *)&pblimage_header,
322 pblimage_check_params,
323 pblimage_verify_header,
324 pblimage_print_header,
325 pblimage_set_header,
326 NULL,
327 pblimage_check_image_types,
328 NULL,
329 NULL
330 );
331