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Diffstat (limited to 'tools/pblimage.c')
| -rw-r--r-- | tools/pblimage.c | 331 |
1 files changed, 331 insertions, 0 deletions
diff --git a/tools/pblimage.c b/tools/pblimage.c new file mode 100644 index 0000000..508a747 --- /dev/null +++ b/tools/pblimage.c @@ -0,0 +1,331 @@ +/* + * Copyright 2012 Freescale Semiconductor, Inc. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ +#define _GNU_SOURCE + +#include "mkimage.h" +#include <image.h> +#include "pblimage.h" + +/* + * The PBL can load up to 64 bytes at a time, so we split the U-Boot + * image into 64 byte chunks. PBL needs a command for each piece, of + * the form "81xxxxxx", where "xxxxxx" is the offset. SYS_TEXT_BASE + * is 0xFFF80000 for PBL boot, and PBL only cares about low 24-bit, + * so it starts from 0x81F80000. + */ +static uint32_t next_pbl_cmd = 0x81F80000; +/* + * need to store all bytes in memory for calculating crc32, then write the + * bytes to image file for PBL boot. + */ +static unsigned char mem_buf[600000]; +static unsigned char *pmem_buf = mem_buf; +static int pbl_size; +static char *fname = "Unknown"; +static int lineno = -1; +static struct pbl_header pblimage_header; + +static union +{ + char c[4]; + unsigned char l; +} endian_test = { {'l', '?', '?', 'b'} }; + +#define ENDIANNESS ((char)endian_test.l) + +static void generate_pbl_cmd(void) +{ + uint32_t val = next_pbl_cmd; + next_pbl_cmd += 0x40; + int i; + + for (i = 3; i >= 0; i--) { + *pmem_buf++ = (val >> (i * 8)) & 0xff; + pbl_size++; + } +} + +static void pbl_fget(size_t size, FILE *stream) +{ + unsigned char c; + int c_temp; + + while (size && (c_temp = fgetc(stream)) != EOF) { + c = (unsigned char)c_temp; + *pmem_buf++ = c; + pbl_size++; + size--; + } +} + +/* load split u-boot with PBI command 81xxxxxx. */ +static void load_uboot(FILE *fp_uboot) +{ + while (next_pbl_cmd < 0x82000000) { + generate_pbl_cmd(); + pbl_fget(64, fp_uboot); + } +} + +static void check_get_hexval(char *token) +{ + uint32_t hexval; + int i; + + if (!sscanf(token, "%x", &hexval)) { + printf("Error:%s[%d] - Invalid hex data(%s)\n", fname, + lineno, token); + exit(EXIT_FAILURE); + } + for (i = 3; i >= 0; i--) { + *pmem_buf++ = (hexval >> (i * 8)) & 0xff; + pbl_size++; + } +} + +static void pbl_parser(char *name) +{ + FILE *fd = NULL; + char *line = NULL; + char *token, *saveptr1, *saveptr2; + size_t len = 0; + + fname = name; + fd = fopen(name, "r"); + if (fd == NULL) { + printf("Error:%s - Can't open\n", fname); + exit(EXIT_FAILURE); + } + + while ((getline(&line, &len, fd)) > 0) { + lineno++; + token = strtok_r(line, "\r\n", &saveptr1); + /* drop all lines with zero tokens (= empty lines) */ + if (token == NULL) + continue; + for (line = token;; line = NULL) { + token = strtok_r(line, " \t", &saveptr2); + if (token == NULL) + break; + /* Drop all text starting with '#' as comments */ + if (token[0] == '#') + break; + check_get_hexval(token); + } + } + if (line) + free(line); + fclose(fd); +} + +static uint32_t crc_table[256]; + +static void make_crc_table(void) +{ + uint32_t mask; + int i, j; + uint32_t poly; /* polynomial exclusive-or pattern */ + + /* + * the polynomial used by PBL is 1 + x1 + x2 + x4 + x5 + x7 + x8 + x10 + * + x11 + x12 + x16 + x22 + x23 + x26 + x32. + */ + poly = 0x04c11db7; + + for (i = 0; i < 256; i++) { + mask = i << 24; + for (j = 0; j < 8; j++) { + if (mask & 0x80000000) + mask = (mask << 1) ^ poly; + else + mask <<= 1; + } + crc_table[i] = mask; + } +} + +unsigned long pbl_crc32(unsigned long crc, const char *buf, uint32_t len) +{ + uint32_t crc32_val = 0xffffffff; + uint32_t xor = 0x0; + int i; + + make_crc_table(); + + for (i = 0; i < len; i++) + crc32_val = (crc32_val << 8) ^ + crc_table[(crc32_val >> 24) ^ (*buf++ & 0xff)]; + + crc32_val = crc32_val ^ xor; + if (crc32_val < 0) { + crc32_val += 0xffffffff; + crc32_val += 1; + } + return crc32_val; +} + +static uint32_t reverse_byte(uint32_t val) +{ + uint32_t temp; + unsigned char *p1; + int j; + + temp = val; + p1 = (unsigned char *)&temp; + for (j = 3; j >= 0; j--) + *p1++ = (val >> (j * 8)) & 0xff; + return temp; +} + +/* write end command and crc command to memory. */ +static void add_end_cmd(void) +{ + uint32_t pbl_end_cmd[4] = {0x09138000, 0x00000000, + 0x091380c0, 0x00000000}; + uint32_t crc32_pbl; + int i; + unsigned char *p = (unsigned char *)&pbl_end_cmd; + + if (ENDIANNESS == 'l') { + for (i = 0; i < 4; i++) + pbl_end_cmd[i] = reverse_byte(pbl_end_cmd[i]); + } + + for (i = 0; i < 16; i++) { + *pmem_buf++ = *p++; + pbl_size++; + } + + /* Add PBI CRC command. */ + *pmem_buf++ = 0x08; + *pmem_buf++ = 0x13; + *pmem_buf++ = 0x80; + *pmem_buf++ = 0x40; + pbl_size += 4; + + /* calculated CRC32 and write it to memory. */ + crc32_pbl = pbl_crc32(0, (const char *)mem_buf, pbl_size); + *pmem_buf++ = (crc32_pbl >> 24) & 0xff; + *pmem_buf++ = (crc32_pbl >> 16) & 0xff; + *pmem_buf++ = (crc32_pbl >> 8) & 0xff; + *pmem_buf++ = (crc32_pbl) & 0xff; + pbl_size += 4; + + if ((pbl_size % 16) != 0) { + for (i = 0; i < 8; i++) { + *pmem_buf++ = 0x0; + pbl_size++; + } + } + if ((pbl_size % 16 != 0)) { + printf("Error: Bad size of image file\n"); + exit(EXIT_FAILURE); + } +} + +void pbl_load_uboot(int ifd, struct mkimage_params *params) +{ + FILE *fp_uboot; + int size; + + /* parse the rcw.cfg file. */ + pbl_parser(params->imagename); + + /* parse the pbi.cfg file. */ + pbl_parser(params->imagename2); + + fp_uboot = fopen(params->datafile, "r"); + if (fp_uboot == NULL) { + printf("Error: %s open failed\n", params->datafile); + exit(EXIT_FAILURE); + } + + load_uboot(fp_uboot); + add_end_cmd(); + fclose(fp_uboot); + lseek(ifd, 0, SEEK_SET); + + size = pbl_size; + if (write(ifd, (const void *)&mem_buf, size) != size) { + fprintf(stderr, "Write error on %s: %s\n", + params->imagefile, strerror(errno)); + exit(EXIT_FAILURE); + } +} + +static int pblimage_check_image_types(uint8_t type) +{ + if (type == IH_TYPE_PBLIMAGE) + return EXIT_SUCCESS; + else + return EXIT_FAILURE; +} + +static int pblimage_verify_header(unsigned char *ptr, int image_size, + struct mkimage_params *params) +{ + struct pbl_header *pbl_hdr = (struct pbl_header *) ptr; + + /* Only a few checks can be done: search for magic numbers */ + if (ENDIANNESS == 'l') { + if (pbl_hdr->preamble != reverse_byte(RCW_PREAMBLE)) + return -FDT_ERR_BADSTRUCTURE; + + if (pbl_hdr->rcwheader != reverse_byte(RCW_HEADER)) + return -FDT_ERR_BADSTRUCTURE; + } else { + if (pbl_hdr->preamble != RCW_PREAMBLE) + return -FDT_ERR_BADSTRUCTURE; + + if (pbl_hdr->rcwheader != RCW_HEADER) + return -FDT_ERR_BADSTRUCTURE; + } + return 0; +} + +static void pblimage_print_header(const void *ptr) +{ + printf("Image Type: Freescale PBL Boot Image\n"); +} + +static void pblimage_set_header(void *ptr, struct stat *sbuf, int ifd, + struct mkimage_params *params) +{ + /*nothing need to do, pbl_load_uboot takes care of whole file. */ +} + +/* pblimage parameters */ +static struct image_type_params pblimage_params = { + .name = "Freescale PBL Boot Image support", + .header_size = sizeof(struct pbl_header), + .hdr = (void *)&pblimage_header, + .check_image_type = pblimage_check_image_types, + .verify_header = pblimage_verify_header, + .print_header = pblimage_print_header, + .set_header = pblimage_set_header, +}; + +void init_pbl_image_type(void) +{ + pbl_size = 0; + mkimage_register(&pblimage_params); +} |