xref: /openbmc/u-boot/tools/pblimage.c (revision a26cd049)
1 /*
2  * Copyright 2012-2014 Freescale Semiconductor, Inc.
3  *
4  * SPDX-License-Identifier:	GPL-2.0+
5  */
6 #include "imagetool.h"
7 #include <image.h>
8 #include "pblimage.h"
9 #include "pbl_crc32.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  */
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 
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. */
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 
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 
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 
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. */
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 
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 	pbl_parser(params->imagename2);
198 
199 	fp_uboot = fopen(params->datafile, "r");
200 	if (fp_uboot == NULL) {
201 		printf("Error: %s open failed\n", params->datafile);
202 		exit(EXIT_FAILURE);
203 	}
204 
205 	load_uboot(fp_uboot);
206 	add_end_cmd();
207 	fclose(fp_uboot);
208 	lseek(ifd, 0, SEEK_SET);
209 
210 	size = pbl_size;
211 	if (write(ifd, (const void *)&mem_buf, size) != size) {
212 		fprintf(stderr, "Write error on %s: %s\n",
213 			params->imagefile, strerror(errno));
214 		exit(EXIT_FAILURE);
215 	}
216 }
217 
218 static int pblimage_check_image_types(uint8_t type)
219 {
220 	if (type == IH_TYPE_PBLIMAGE)
221 		return EXIT_SUCCESS;
222 	else
223 		return EXIT_FAILURE;
224 }
225 
226 static int pblimage_verify_header(unsigned char *ptr, int image_size,
227 			struct image_tool_params *params)
228 {
229 	struct pbl_header *pbl_hdr = (struct pbl_header *) ptr;
230 
231 	/* Only a few checks can be done: search for magic numbers */
232 	if (ENDIANNESS == 'l') {
233 		if (pbl_hdr->preamble != reverse_byte(RCW_PREAMBLE))
234 			return -FDT_ERR_BADSTRUCTURE;
235 
236 		if (pbl_hdr->rcwheader != reverse_byte(RCW_HEADER))
237 			return -FDT_ERR_BADSTRUCTURE;
238 	} else {
239 		if (pbl_hdr->preamble != RCW_PREAMBLE)
240 			return -FDT_ERR_BADSTRUCTURE;
241 
242 		if (pbl_hdr->rcwheader != RCW_HEADER)
243 			return -FDT_ERR_BADSTRUCTURE;
244 	}
245 	return 0;
246 }
247 
248 static void pblimage_print_header(const void *ptr)
249 {
250 	printf("Image Type:   Freescale PBL Boot Image\n");
251 }
252 
253 static void pblimage_set_header(void *ptr, struct stat *sbuf, int ifd,
254 				struct image_tool_params *params)
255 {
256 	/*nothing need to do, pbl_load_uboot takes care of whole file. */
257 }
258 
259 int pblimage_check_params(struct image_tool_params *params)
260 {
261 	FILE *fp_uboot;
262 	int fd;
263 	struct stat st;
264 
265 	if (!params)
266 		return EXIT_FAILURE;
267 
268 	fp_uboot = fopen(params->datafile, "r");
269 	if (fp_uboot == NULL) {
270 		printf("Error: %s open failed\n", params->datafile);
271 		exit(EXIT_FAILURE);
272 	}
273 	fd = fileno(fp_uboot);
274 
275 	if (fstat(fd, &st) == -1) {
276 		printf("Error: Could not determine u-boot image size. %s\n",
277 		       strerror(errno));
278 		exit(EXIT_FAILURE);
279 	}
280 
281 	/* For the variable size, we need to pad it to 64 byte boundary */
282 	uboot_size = roundup(st.st_size, 64);
283 
284 	if (params->arch == IH_ARCH_ARM) {
285 		arch_flag = IH_ARCH_ARM;
286 		pbi_crc_cmd1 = 0x61;
287 		pbi_crc_cmd2 = 0;
288 		pbl_cmd_initaddr = params->addr & PBL_ADDR_24BIT_MASK;
289 		pbl_cmd_initaddr |= PBL_ACS_CONT_CMD;
290 		pbl_cmd_initaddr |= uboot_size;
291 		pbl_end_cmd[0] = 0x09610000;
292 		pbl_end_cmd[1] = 0x00000000;
293 		pbl_end_cmd[2] = 0x096100c0;
294 		pbl_end_cmd[3] = 0x00000000;
295 	} else if (params->arch == IH_ARCH_PPC) {
296 		arch_flag = IH_ARCH_PPC;
297 		pbi_crc_cmd1 = 0x13;
298 		pbi_crc_cmd2 = 0x80;
299 		pbl_cmd_initaddr = 0x82000000;
300 		pbl_end_cmd[0] = 0x09138000;
301 		pbl_end_cmd[1] = 0x00000000;
302 		pbl_end_cmd[2] = 0x091380c0;
303 		pbl_end_cmd[3] = 0x00000000;
304 	}
305 
306 	next_pbl_cmd = pbl_cmd_initaddr;
307 	return 0;
308 };
309 
310 /* pblimage parameters */
311 U_BOOT_IMAGE_TYPE(
312 	pblimage,
313 	"Freescale PBL Boot Image support",
314 	sizeof(struct pbl_header),
315 	(void *)&pblimage_header,
316 	pblimage_check_params,
317 	pblimage_verify_header,
318 	pblimage_print_header,
319 	pblimage_set_header,
320 	NULL,
321 	pblimage_check_image_types,
322 	NULL,
323 	NULL
324 );
325