]>
git.ipfire.org Git - people/ms/u-boot.git/blob - tools/mkexynosspl.c
2 * Copyright (C) 2012 Samsung Electronics
4 * See file CREDITS for list of people who contributed to this
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
32 #define CHECKSUM_OFFSET (14*1024-4)
33 #define BUFSIZE (14*1024)
34 #define FILE_PERM (S_IRUSR | S_IWUSR | S_IRGRP \
35 | S_IWGRP | S_IROTH | S_IWOTH)
38 * IROM code reads first 14K bytes from boot device.
39 * It then calculates the checksum of 14K-4 bytes and compare with data at
42 * This function takes two filenames:
43 * IN "u-boot-spl.bin" and
44 * OUT "$(BOARD)-spl.bin as filenames.
45 * It reads the "u-boot-spl.bin" in 16K buffer.
46 * It calculates checksum of 14K-4 Bytes and stores at 14K-4 offset in buffer.
47 * It writes the buffer to "$(BOARD)-spl.bin" file.
50 int main(int argc
, char **argv
)
52 unsigned char buffer
[BUFSIZE
];
54 uint32_t checksum
= 0;
60 fprintf(stderr
, "Usage: %s <infile> <outfile>\n", argv
[0]);
64 ifd
= open(argv
[1], O_RDONLY
);
66 fprintf(stderr
, "%s: Can't open %s: %s\n",
67 argv
[0], argv
[1], strerror(errno
));
71 ofd
= open(argv
[2], O_WRONLY
| O_CREAT
| O_TRUNC
, FILE_PERM
);
73 fprintf(stderr
, "%s: Can't open %s: %s\n",
74 argv
[0], argv
[2], strerror(errno
));
79 if (fstat(ifd
, &stat
)) {
80 fprintf(stderr
, "%s: Unable to get size of %s: %s\n",
81 argv
[0], argv
[1], strerror(errno
));
89 count
= (len
< CHECKSUM_OFFSET
) ? len
: CHECKSUM_OFFSET
;
91 if (read(ifd
, buffer
, count
) != count
) {
92 fprintf(stderr
, "%s: Can't read %s: %s\n",
93 argv
[0], argv
[1], strerror(errno
));
101 for (i
= 0, checksum
= 0; i
< CHECKSUM_OFFSET
; i
++)
102 checksum
+= buffer
[i
];
104 checksum
= cpu_to_le32(checksum
);
106 memcpy(&buffer
[CHECKSUM_OFFSET
], &checksum
, sizeof(checksum
));
108 if (write(ofd
, buffer
, BUFSIZE
) != BUFSIZE
) {
109 fprintf(stderr
, "%s: Can't write %s: %s\n",
110 argv
[0], argv
[2], strerror(errno
));