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authorChander Kashyap <chander.kashyap@linaro.org>2012-02-05 23:01:48 +0000
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2012-02-12 10:11:30 +0100
commit81e352032ccbf00e756083adc70d418a6ea80b14 (patch)
tree6407b97408426da3727004b532b5db3b925b1a7e /tools/mkexynosspl.c
parent0aee53baccd29a3153ba04403ace4159248d95db (diff)
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EXYNOS: SMDK5250: Add MMC SPL support
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>
Diffstat (limited to 'tools/mkexynosspl.c')
-rw-r--r--tools/mkexynosspl.c122
1 files changed, 122 insertions, 0 deletions
diff --git a/tools/mkexynosspl.c b/tools/mkexynosspl.c
new file mode 100644
index 0000000..6a8dd93
--- /dev/null
+++ b/tools/mkexynosspl.c
@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <compiler.h>
+
+#define CHECKSUM_OFFSET (14*1024-4)
+#define BUFSIZE (14*1024)
+#define FILE_PERM (S_IRUSR | S_IWUSR | S_IRGRP \
+ | S_IWGRP | S_IROTH | S_IWOTH)
+/*
+* Requirement:
+* IROM code reads first 14K bytes from boot device.
+* It then calculates the checksum of 14K-4 bytes and compare with data at
+* 14K-4 offset.
+*
+* This function takes two filenames:
+* IN "u-boot-spl.bin" and
+* OUT "$(BOARD)-spl.bin as filenames.
+* It reads the "u-boot-spl.bin" in 16K buffer.
+* It calculates checksum of 14K-4 Bytes and stores at 14K-4 offset in buffer.
+* It writes the buffer to "$(BOARD)-spl.bin" file.
+*/
+
+int main(int argc, char **argv)
+{
+ unsigned char buffer[BUFSIZE];
+ int i, ifd, ofd;
+ uint32_t checksum = 0;
+ off_t len;
+ ssize_t count;
+ struct stat stat;
+
+ if (argc != 3) {
+ fprintf(stderr, "Usage: %s <infile> <outfile>\n", argv[0]);
+ exit(EXIT_FAILURE);
+ }
+
+ ifd = open(argv[1], O_RDONLY);
+ if (ifd < 0) {
+ fprintf(stderr, "%s: Can't open %s: %s\n",
+ argv[0], argv[1], strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+
+ ofd = open(argv[2], O_WRONLY | O_CREAT | O_TRUNC, FILE_PERM);
+ if (ifd < 0) {
+ fprintf(stderr, "%s: Can't open %s: %s\n",
+ argv[0], argv[2], strerror(errno));
+ close(ifd);
+ exit(EXIT_FAILURE);
+ }
+
+ if (fstat(ifd, &stat)) {
+ fprintf(stderr, "%s: Unable to get size of %s: %s\n",
+ argv[0], argv[1], strerror(errno));
+ close(ifd);
+ close(ofd);
+ exit(EXIT_FAILURE);
+ }
+
+ len = stat.st_size;
+
+ count = (len < CHECKSUM_OFFSET) ? len : CHECKSUM_OFFSET;
+
+ if (read(ifd, buffer, count) != count) {
+ fprintf(stderr, "%s: Can't read %s: %s\n",
+ argv[0], argv[1], strerror(errno));
+
+ close(ifd);
+ close(ofd);
+
+ exit(EXIT_FAILURE);
+ }
+
+ for (i = 0, checksum = 0; i < CHECKSUM_OFFSET; i++)
+ checksum += buffer[i];
+
+ checksum = cpu_to_le32(checksum);
+
+ memcpy(&buffer[CHECKSUM_OFFSET], &checksum, sizeof(checksum));
+
+ if (write(ofd, buffer, BUFSIZE) != BUFSIZE) {
+ fprintf(stderr, "%s: Can't write %s: %s\n",
+ argv[0], argv[2], strerror(errno));
+
+ close(ifd);
+ close(ofd);
+
+ exit(EXIT_FAILURE);
+ }
+
+ close(ifd);
+ close(ofd);
+
+ return EXIT_SUCCESS;
+}