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/*
* This file is part of the coreboot project.
*
* Copyright 2014 Imagination Technologies Ltd.
*
* 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; version 2 of
* the License.
*
* 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., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/types.h>
struct bimg_header {
uint32_t magic;
uint16_t ver_major;
uint16_t ver_minor;
uint32_t data_size;
uint32_t entry_addr;
uint32_t flags;
uint32_t data_crc;
uint32_t crc;
} __attribute__((packed));
struct bimg_data_header {
uint32_t size;
uint32_t dest_addr;
uint16_t crc;
} __attribute__((packed));
#define BIMG_MAGIC /* y */ 0xabbadaba /* doo! */
#define BIMG_OP_MASK (0xf << 0)
#define BIMG_OP_EXEC_RETURN (0x1 << 0)
#define BIMG_OP_EXEC_NO_RETURN (0x2 << 0)
#define BIMG_DATA_CHECKSUM (0x1 << 4)
#define MAX_RECORD_BYTES 0x8000
#define CRC_INIT 0xffff
#define error(msg...) fprintf(stderr, "ERROR: " msg)
#define error_ret(ret, msg...) { \
error(msg); \
return ret; \
}
static uint16_t crc_x25(uint16_t crc, void *void_buf, size_t size)
{
static const uint16_t crc_table[16] = {
0x0000, 0x1021, 0x2042, 0x3063,
0x4084, 0x50a5, 0x60c6, 0x70e7,
0x8108, 0x9129, 0xa14a, 0xb16b,
0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
};
uint8_t *buf, data;
for (buf = void_buf; size; size--) {
data = *buf++;
crc = (crc << 4) ^ crc_table[((crc >> 12) ^ (data >> 4)) & 0xf];
crc = (crc << 4) ^ crc_table[((crc >> 12) ^ (data >> 0)) & 0xf];
}
return crc;
}
static int write_binary(FILE *out, FILE *in, struct bimg_header *hdr)
{
static uint8_t file_buf[MAX_RECORD_BYTES];
struct bimg_data_header data_hdr;
size_t n_written;
data_hdr.dest_addr = hdr->entry_addr;
while ((data_hdr.size = fread(file_buf, 1, sizeof(file_buf), in))) {
data_hdr.crc = crc_x25(CRC_INIT, &data_hdr,
sizeof(data_hdr) - sizeof(data_hdr.crc));
if (fwrite(&data_hdr, sizeof(data_hdr), 1, out) != 1)
error_ret(-EIO, "Failed to write data header: %d\n",
errno);
n_written = fwrite(file_buf, 1, data_hdr.size, out);
if (n_written != data_hdr.size)
error_ret(-EIO, "Failed to write to output file: %d\n",
errno);
data_hdr.dest_addr += n_written;
hdr->data_size += sizeof(data_hdr) + n_written;
hdr->data_crc = crc_x25(hdr->data_crc, file_buf, n_written);
}
if (ferror(in))
error_ret(-EIO, "Failed to read input file\n");
return 0;
}
static int write_final(FILE *out, struct bimg_header *hdr)
{
struct bimg_data_header data_hdr = {
.size = 0,
.dest_addr = ~0,
};
data_hdr.crc = crc_x25(CRC_INIT, &data_hdr,
sizeof(data_hdr) - sizeof(data_hdr.crc));
if (fwrite(&data_hdr, sizeof(data_hdr), 1, out) != 1)
error_ret(-EIO, "Failed to write data header: %d\n", errno);
hdr->data_size += sizeof(data_hdr);
return 0;
}
static void usage(FILE *f)
{
fprintf(f,
"Usage: bimgtool <input> <output> <base-address>\n"
"\n"
"bimgtool is a simple tool which generates boot images in the "
"BIMG format used in systems designed by Imagination "
"Technologies, for example the Pistachio SoC. This version of the "
"tool generates BIMG version 1.0 images.\n"
"\n"
" input: The binary file to be converted to a BIMG\n"
" output: The name of the output BIMG file\n"
" base-address: The address in memory at which you wish the "
"input binary to be loaded.\n");
}
int main(int argc, char *argv[])
{
const char *in_filename, *out_filename;
FILE *in_file, *out_file;
int err;
struct bimg_header hdr = {
.magic = BIMG_MAGIC,
.ver_major = 1,
.ver_minor = 0,
.flags = BIMG_OP_EXEC_NO_RETURN | BIMG_DATA_CHECKSUM,
.data_crc = CRC_INIT,
};
if (argc != 4) {
usage(stderr);
goto out_err;
}
in_filename = argv[1];
out_filename = argv[2];
hdr.entry_addr = strtoul(argv[3], NULL, 16);
in_file = fopen(in_filename, "r");
if (!in_file) {
error("Failed to open input file '%s'\n", in_filename);
goto out_err;
}
out_file = fopen(out_filename, "w");
if (!out_file) {
error("Failed to open output file '%s'\n", out_filename);
goto out_err_close_in;
}
if (fseek(out_file, sizeof(hdr), SEEK_SET)) {
error("Failed to seek past header: %d\n", errno);
goto out_err_close_out;
}
err = write_binary(out_file, in_file, &hdr);
if (err) {
error("Failed to write binary: %d\n", err);
goto out_err_close_out;
}
err = write_final(out_file, &hdr);
if (err) {
error("Failed to write final record: %d\n", err);
goto out_err_close_out;
}
hdr.crc = crc_x25(CRC_INIT, &hdr, sizeof(hdr) - sizeof(hdr.crc));
if (fseek(out_file, 0, SEEK_SET)) {
error("Failed to seek to header: %d\n", errno);
goto out_err_close_out;
}
if (fwrite(&hdr, sizeof(hdr), 1, out_file) != 1) {
error("Failed to write header: %d\n", errno);
goto out_err_close_out;
}
fclose(in_file);
fclose(out_file);
return EXIT_SUCCESS;
out_err_close_out:
fclose(out_file);
out_err_close_in:
fclose(in_file);
out_err:
return EXIT_FAILURE;
}
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