tools/pblimage.c

   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 );