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/* SPDX-License-Identifier: GPL-2.0-only */
#include <stdio.h>
#include <stdlib.h>
static void usage(const char *s)
{
printf("insert firmware blobs:\n\t"
"%s <rom file> <fw1> <fw2> <fw1 offset> <fw2 offset>\n\n",
s);
printf("set addresses of firmware blobs only:\n\t"
"%s <rom file> <fw1 offset> <fw2 offset>\n\n",
s);
printf(
"offset can be (example is put it to 0x7ffa00 when ROM is 8MB):\n"
"- file offset: 0x7ffa00\n"
"- distance to the end of file: -0x600\n"
"- the address when ROM is mapped to the end of memory: "
"0xfffffa00\n");
exit(1);
}
static void FseekEnd(FILE *fp, long o)
{
if (fseek(fp, o, SEEK_END) != 0) {
puts("fseek() error!\n");
exit(1);
}
}
static long negoffset(long a, long romsz)
{
if (a > 0) {
if (a & 0x80000000) /* the address in memory, and sizeof(long)
is 8 */
return a - 0x100000000;
else /* the file offset */
return a - romsz;
} else {
return a;
}
}
int main(int argc, char *argv[])
{
FILE *fp, *fw1, *fw2;
long offset1, offset2;
if (argc != 4 && argc != 6)
usage(argv[0]);
fp = fopen(argv[1], "rb+");
if (fp == NULL) {
puts("Error opening firmware image!");
exit(1);
}
if (argc == 6) {
fw1 = fopen(argv[2], "rb");
fw2 = fopen(argv[3], "rb");
offset1 = strtoul(argv[4], NULL, 0);
offset2 = strtoul(argv[5], NULL, 0);
if (fw1 == NULL || fw2 == NULL) {
puts("Error opening file!");
exit(1);
}
} else {
fw1 = NULL;
fw2 = NULL;
offset1 = strtoul(argv[2], NULL, 0);
offset2 = strtoul(argv[3], NULL, 0);
}
if ((offset1 & 0xff) || (offset2 & 0xff)) {
puts("The offsets must be aligned to 0x100");
exit(1);
}
long romsz;
FseekEnd(fp, -1);
romsz = ftell(fp) + 1;
printf("size of %s: 0x%lx\n", argv[1], romsz);
if (romsz & 0xff) {
puts("The ROM size must be multiple of 0x100");
exit(1);
}
offset1 = negoffset(offset1, romsz);
offset2 = negoffset(offset2, romsz);
/* write two offsets to $s-0x100 */
char offs[8];
long os;
os = 0x1000000 + offset1;
offs[0] = os >> 16;
offs[1] = os >> 8;
offs[2] = 0xff - offs[0];
offs[3] = 0xff - offs[1];
os = 0x1000000 + offset2;
offs[4] = os >> 16;
offs[5] = os >> 8;
offs[6] = 0xff - offs[4];
offs[7] = 0xff - offs[5];
for (size_t i = 0; i < 8; i++)
printf("%02hhx ", offs[i]);
puts("");
FseekEnd(fp, -0x100);
printf("writing to 0x%lx\n", ftell(fp));
fwrite(offs, 1, 8, fp);
if (argc == 6) {
/* write fw1 and fw2 */
char c;
FseekEnd(fp, offset1);
printf("writing to 0x%lx\n", ftell(fp));
while (fread(&c, 1, 1, fw1) == 1)
fwrite(&c, 1, 1, fp);
FseekEnd(fp, offset2);
printf("writing to 0x%lx\n", ftell(fp));
while (fread(&c, 1, 1, fw2) == 1)
fwrite(&c, 1, 1, fp);
fclose(fw1);
fclose(fw2);
}
fclose(fp);
return 0;
}
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