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//
// Copyright (C) 2015 Marcus Comstedt <marcus@mc.pp.se>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
#include <fstream>
#include <iostream>
#include <cstdint>
#include <memory>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef __EMSCRIPTEN__
#include <emscripten.h>
#endif
#define log(...) fprintf(stderr, __VA_ARGS__);
#define error(...) do { fprintf(stderr, "%s: ", program_short_name); fprintf(stderr, __VA_ARGS__); exit(EXIT_FAILURE); } while (0)
static char *program_short_name;
static const int NUM_IMAGES = 4;
static const int HEADER_SIZE = 32;
static void align_offset(uint32_t &offset, int bits)
{
uint32_t mask = (1 << bits) - 1;
if (offset & mask)
offset = (offset | mask) + 1;
}
static void write_byte(std::ostream &ofs, uint32_t &file_offset, uint8_t byte)
{
ofs << byte;
file_offset++;
}
static void write_bytes(std::ostream &ofs, uint32_t &file_offset,
const uint8_t *buf, size_t n)
{
if (n > 0) {
ofs.write(reinterpret_cast<const char*>(buf), n);
file_offset += n;
}
}
static void write_file(std::ostream &ofs, uint32_t &file_offset,
std::istream &ifs, const char *filename)
{
const size_t bufsize = 8192;
uint8_t *buffer = new uint8_t[bufsize];
while(!ifs.eof()) {
ifs.read(reinterpret_cast<char *>(buffer), bufsize);
if (ifs.bad())
error("can't read input image `%s': %s\n", filename, strerror(errno));
write_bytes(ofs, file_offset, buffer, ifs.gcount());
}
delete[] buffer;
}
static void pad_to(std::ostream &ofs, uint32_t &file_offset, uint32_t target)
{
if (target < file_offset)
error("Trying to pad backwards!\n");
while(file_offset < target)
write_byte(ofs, file_offset, 0xff);
}
class Image {
std::ifstream ifs;
uint32_t offs;
public:
const char *const filename;
Image(const char *filename);
size_t size();
void write(std::ostream &ofs, uint32_t &file_offset);
void place(uint32_t o) { offs = o; }
uint32_t offset() const { return offs; }
};
Image::Image(const char *filename) : ifs(filename, std::ifstream::binary), filename(filename)
{
if (ifs.fail())
error("can't open input image `%s': %s\n", filename, strerror(errno));
}
size_t Image::size()
{
ifs.seekg (0, ifs.end);
if (ifs.fail())
error("can't seek on input image `%s': %s\n", filename, strerror(errno));
size_t length = ifs.tellg();
ifs.seekg (0, ifs.beg);
if (ifs.fail())
error("can't seek on input image `%s': %s\n", filename, strerror(errno));
if (length == 0)
error("input image `%s' doesn't contain any data\n", filename);
return length;
}
void Image::write(std::ostream &ofs, uint32_t &file_offset)
{
write_file(ofs, file_offset, ifs, filename);
}
static void write_header(std::ostream &ofs, uint32_t &file_offset,
Image const *image, bool coldboot)
{
// Preamble
write_byte(ofs, file_offset, 0x7e);
write_byte(ofs, file_offset, 0xaa);
write_byte(ofs, file_offset, 0x99);
write_byte(ofs, file_offset, 0x7e);
// Boot mode
write_byte(ofs, file_offset, 0x92);
write_byte(ofs, file_offset, 0x00);
write_byte(ofs, file_offset, coldboot ? 0x10 : 0x00);
// Boot address
write_byte(ofs, file_offset, 0x44);
write_byte(ofs, file_offset, 0x03);
write_byte(ofs, file_offset, (image->offset() >> 16) & 0xff);
write_byte(ofs, file_offset, (image->offset() >> 8) & 0xff);
write_byte(ofs, file_offset, image->offset() & 0xff);
// Bank offset
write_byte(ofs, file_offset, 0x82);
write_byte(ofs, file_offset, 0x00);
write_byte(ofs, file_offset, 0x00);
// Reboot
write_byte(ofs, file_offset, 0x01);
write_byte(ofs, file_offset, 0x08);
// Zero out any unused bytes
while (file_offset & (HEADER_SIZE - 1))
write_byte(ofs, file_offset, 0x00);
}
void usage()
{
log("\n");
log("Usage: icemulti [options] input-files\n");
log("\n");
log(" -c\n");
log(" coldboot mode, power on reset image is selected by CBSEL0/CBSEL1\n");
log("\n");
log(" -p0, -p1, -p2, -p3\n");
log(" select power on reset image when not using coldboot mode\n");
log("\n");
log(" -a<n>, -A<n>\n");
log(" align images at 2^<n> bytes. -A also aligns image 0.\n");
log("\n");
log(" -o filename\n");
log(" write output image to file instead of stdout\n");
log("\n");
log(" -v\n");
log(" verbose (repeat to increase verbosity)\n");
log("\n");
exit(EXIT_FAILURE);
}
int main(int argc, char **argv)
{
#ifdef __EMSCRIPTEN__
EM_ASM(
if (ENVIRONMENT_IS_NODE)
{
FS.mkdir('/hostcwd');
FS.mount(NODEFS, { root: '.' }, '/hostcwd');
FS.mkdir('/hostfs');
FS.mount(NODEFS, { root: '/' }, '/hostfs');
}
);
#endif
int c;
char *endptr = NULL;
bool coldboot = false;
int por_image = 0;
int header_count = 0;
int image_count = 0;
int align_bits = 0;
bool align_first = false;
Image *header_images[NUM_IMAGES];
std::unique_ptr<Image> images[NUM_IMAGES];
const char *outfile_name = NULL;
bool print_offsets = false;
static struct option long_options[] = {
{NULL, 0, NULL, 0}
};
program_short_name = strrchr(argv[0], '/');
if (program_short_name == NULL)
program_short_name = argv[0];
else
program_short_name++;
while ((c = getopt_long(argc, argv, "cp:a:A:o:v",
long_options, NULL)) != -1)
switch (c) {
case 'c':
coldboot = true;
break;
case 'p':
if (optarg[0] == '0' && optarg[1] == '\0')
por_image = 0;
else if (optarg[0] == '1' && optarg[1] == '\0')
por_image = 1;
else if (optarg[0] == '2' && optarg[1] == '\0')
por_image = 2;
else if (optarg[0] == '3' && optarg[1] == '\0')
por_image = 3;
else
error("`%s' is not a valid power-on/reset image (must be 0, 1, 2, or 3)\n", optarg);
break;
case 'A':
align_first = true;
/* fallthrough */
case 'a':
align_bits = strtol(optarg, &endptr, 0);
if (*endptr != '\0')
error("`%s' is not a valid number\n", optarg);
if (align_bits < 0)
error("argument to `-%c' must be non-negative\n", c);
break;
case 'o':
outfile_name = optarg;
break;
case 'v':
print_offsets = true;
break;
default:
usage();
}
if (optind == argc) {
fprintf(stderr, "%s: missing argument\n", program_short_name);
usage();
}
while (optind != argc) {
if (header_count >= NUM_IMAGES)
error("Too many images supplied\n");
for (int i = 0; i < image_count; i++)
if (strcmp(argv[optind], images[i]->filename) == 0) {
header_images[header_count] = &*images[i];
goto image_found;
}
images[image_count].reset(new Image(argv[optind]));
header_images[header_count] = &*images[image_count];
image_count++;
image_found:
header_count++;
optind++;
}
if (coldboot && por_image != 0)
error("Can't select power on reset boot image in cold boot mode\n");
if (por_image >= header_count)
error("Specified non-existing image for power on reset\n");
// Place images
uint32_t offs = (NUM_IMAGES + 1) * HEADER_SIZE;
if (align_first)
align_offset(offs, align_bits);
for (int i=0; i<image_count; i++) {
images[i]->place(offs);
offs += images[i]->size();
align_offset(offs, align_bits);
if (print_offsets)
fprintf(stderr, "Place image %d at %06x .. %06x (`%s')\n", i, int(images[i]->offset()), int(offs), images[i]->filename);
}
// Populate headers
for (int i=header_count; i < NUM_IMAGES; i++)
header_images[i] = header_images[por_image];
std::ofstream ofs;
std::ostream *osp;
if (outfile_name != NULL) {
ofs.open(outfile_name, std::ofstream::binary);
if (!ofs.is_open())
error("can't open output file `%s': %s\n", outfile_name, strerror(errno));
osp = &ofs;
} else {
osp = &std::cout;
}
uint32_t file_offset = 0;
for (int i=0; i<NUM_IMAGES + 1; i++)
{
pad_to(*osp, file_offset, i * HEADER_SIZE);
if (i == 0)
write_header(*osp, file_offset, header_images[por_image], coldboot);
else
write_header(*osp, file_offset, header_images[i - 1], false);
}
for (int i=0; i<image_count; i++)
{
pad_to(*osp, file_offset, images[i]->offset());
images[i]->write(*osp, file_offset);
}
return EXIT_SUCCESS;
}
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