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authorMatteo Croce <rootkit85@yahoo.it>2007-09-20 19:25:38 +0000
committerMatteo Croce <rootkit85@yahoo.it>2007-09-20 19:25:38 +0000
commit8d162264af02231b9c452c0d6d38e3a8b08e4a4a (patch)
tree0e124827fc90b04915f94f48ac725c6d326cd32f /target/linux/ar7/files/drivers/mtd
parentfbc7e5e4fcddb59aa004aea579d08365dfd645a4 (diff)
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Make ar7_part more readable and endianness safe
SVN-Revision: 8886
Diffstat (limited to 'target/linux/ar7/files/drivers/mtd')
-rw-r--r--target/linux/ar7/files/drivers/mtd/ar7part.c29
1 files changed, 19 insertions, 10 deletions
diff --git a/target/linux/ar7/files/drivers/mtd/ar7part.c b/target/linux/ar7/files/drivers/mtd/ar7part.c
index 775041d7d6..8bfd5711a2 100644
--- a/target/linux/ar7/files/drivers/mtd/ar7part.c
+++ b/target/linux/ar7/files/drivers/mtd/ar7part.c
@@ -26,7 +26,18 @@
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/bootmem.h>
-#include <linux/squashfs_fs.h>
+#include <linux/magic.h>
+
+#define AR7_PARTS 4
+#define ROOT_OFFSET 0xe0000
+
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+#define LOADER_MAGIC1 0xfeedfa42
+#define LOADER_MAGIC2 0xfeed1281
+#else
+#define LOADER_MAGIC1 0x42faedfe
+#define LOADER_MAGIC2 0x8112edfe
+#endif
struct ar7_bin_rec {
unsigned int checksum;
@@ -34,7 +45,7 @@ struct ar7_bin_rec {
unsigned int address;
};
-static struct mtd_partition ar7_parts[5];
+static struct mtd_partition ar7_parts[AR7_PARTS];
static int create_mtd_partitions(struct mtd_info *master,
struct mtd_partition **pparts,
@@ -43,12 +54,10 @@ static int create_mtd_partitions(struct mtd_info *master,
struct ar7_bin_rec header;
unsigned int offset, len;
unsigned int pre_size = master->erasesize, post_size = 0;
- unsigned int root_offset = 0xe0000;
+ unsigned int root_offset = ROOT_OFFSET;
int retries = 10;
- printk(KERN_INFO "Parsing AR7 partition map...\n");
-
ar7_parts[0].name = "loader";
ar7_parts[0].offset = 0;
ar7_parts[0].size = master->erasesize;
@@ -65,9 +74,9 @@ static int create_mtd_partitions(struct mtd_info *master,
sizeof(header), &len, (u_char *)&header);
if (!strncmp((char *)&header, "TIENV0.8", 8))
ar7_parts[1].offset = pre_size;
- if (header.checksum == 0xfeedfa42)
+ if (header.checksum == LOADER_MAGIC1)
break;
- if (header.checksum == 0xfeed1281)
+ if (header.checksum == LOADER_MAGIC2)
break;
pre_size += master->erasesize;
} while (retries--);
@@ -80,7 +89,7 @@ static int create_mtd_partitions(struct mtd_info *master,
}
switch (header.checksum) {
- case 0xfeedfa42:
+ case LOADER_MAGIC1:
while (header.length) {
offset += sizeof(header) + header.length;
master->read(master, offset, sizeof(header),
@@ -88,7 +97,7 @@ static int create_mtd_partitions(struct mtd_info *master,
}
root_offset = offset + sizeof(header) + 4;
break;
- case 0xfeed1281:
+ case LOADER_MAGIC2:
while (header.length) {
offset += sizeof(header) + header.length;
master->read(master, offset, sizeof(header),
@@ -120,7 +129,7 @@ static int create_mtd_partitions(struct mtd_info *master,
ar7_parts[3].mask_flags = 0;
*pparts = ar7_parts;
- return 4;
+ return AR7_PARTS;
}
static struct mtd_part_parser ar7_parser = {