81e352032c
This patch adds support for MMC SPL booting. Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
123 lines
3.0 KiB
C
123 lines
3.0 KiB
C
/*
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* Copyright (C) 2012 Samsung Electronics
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <compiler.h>
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#define CHECKSUM_OFFSET (14*1024-4)
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#define BUFSIZE (14*1024)
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#define FILE_PERM (S_IRUSR | S_IWUSR | S_IRGRP \
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| S_IWGRP | S_IROTH | S_IWOTH)
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/*
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* Requirement:
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* IROM code reads first 14K bytes from boot device.
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* It then calculates the checksum of 14K-4 bytes and compare with data at
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* 14K-4 offset.
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*
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* This function takes two filenames:
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* IN "u-boot-spl.bin" and
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* OUT "$(BOARD)-spl.bin as filenames.
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* It reads the "u-boot-spl.bin" in 16K buffer.
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* It calculates checksum of 14K-4 Bytes and stores at 14K-4 offset in buffer.
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* It writes the buffer to "$(BOARD)-spl.bin" file.
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*/
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int main(int argc, char **argv)
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{
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unsigned char buffer[BUFSIZE];
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int i, ifd, ofd;
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uint32_t checksum = 0;
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off_t len;
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ssize_t count;
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struct stat stat;
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if (argc != 3) {
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fprintf(stderr, "Usage: %s <infile> <outfile>\n", argv[0]);
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exit(EXIT_FAILURE);
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}
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ifd = open(argv[1], O_RDONLY);
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if (ifd < 0) {
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fprintf(stderr, "%s: Can't open %s: %s\n",
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argv[0], argv[1], strerror(errno));
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exit(EXIT_FAILURE);
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}
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ofd = open(argv[2], O_WRONLY | O_CREAT | O_TRUNC, FILE_PERM);
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if (ifd < 0) {
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fprintf(stderr, "%s: Can't open %s: %s\n",
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argv[0], argv[2], strerror(errno));
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close(ifd);
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exit(EXIT_FAILURE);
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}
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if (fstat(ifd, &stat)) {
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fprintf(stderr, "%s: Unable to get size of %s: %s\n",
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argv[0], argv[1], strerror(errno));
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close(ifd);
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close(ofd);
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exit(EXIT_FAILURE);
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}
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len = stat.st_size;
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count = (len < CHECKSUM_OFFSET) ? len : CHECKSUM_OFFSET;
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if (read(ifd, buffer, count) != count) {
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fprintf(stderr, "%s: Can't read %s: %s\n",
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argv[0], argv[1], strerror(errno));
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close(ifd);
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close(ofd);
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exit(EXIT_FAILURE);
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}
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for (i = 0, checksum = 0; i < CHECKSUM_OFFSET; i++)
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checksum += buffer[i];
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checksum = cpu_to_le32(checksum);
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memcpy(&buffer[CHECKSUM_OFFSET], &checksum, sizeof(checksum));
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if (write(ofd, buffer, BUFSIZE) != BUFSIZE) {
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fprintf(stderr, "%s: Can't write %s: %s\n",
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argv[0], argv[2], strerror(errno));
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close(ifd);
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close(ofd);
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exit(EXIT_FAILURE);
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}
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close(ifd);
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close(ofd);
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return EXIT_SUCCESS;
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}
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