You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
117 lines
2.8 KiB
Diff
117 lines
2.8 KiB
Diff
--- a/drivers/mtd/Kconfig
|
|
+++ b/drivers/mtd/Kconfig
|
|
@@ -41,6 +41,10 @@ config MTD_ROOTFS_SPLIT
|
|
bool "Automatically split 'rootfs' partition for squashfs"
|
|
default y
|
|
|
|
+config MTD_UIMAGE_SPLIT
|
|
+ bool "Automatically split 'linux' partition into 'kernel' and 'rootfs'"
|
|
+ default y
|
|
+
|
|
config MTD_REDBOOT_PARTS
|
|
tristate "RedBoot partition table parsing"
|
|
---help---
|
|
--- a/drivers/mtd/mtdpart.c
|
|
+++ b/drivers/mtd/mtdpart.c
|
|
@@ -861,6 +861,82 @@ static int refresh_rootfs_split(struct m
|
|
}
|
|
#endif /* CONFIG_MTD_ROOTFS_SPLIT */
|
|
|
|
+
|
|
+#ifdef CONFIG_MTD_UIMAGE_SPLIT
|
|
+static unsigned long find_uimage_size(struct mtd_info *mtd,
|
|
+ unsigned long offset)
|
|
+{
|
|
+#define UBOOT_MAGIC 0x56190527
|
|
+ unsigned long magic = 0;
|
|
+ unsigned long temp;
|
|
+ size_t len;
|
|
+ int ret;
|
|
+
|
|
+ ret = mtd->read(mtd, offset, 4, &len, (void *)&magic);
|
|
+ if (ret || len != sizeof(magic))
|
|
+ return 0;
|
|
+
|
|
+ if (le32_to_cpu(magic) != UBOOT_MAGIC)
|
|
+ return 0;
|
|
+
|
|
+ ret = mtd->read(mtd, offset + 12, 4, &len, (void *)&temp);
|
|
+ if (ret || len != sizeof(temp))
|
|
+ return 0;
|
|
+
|
|
+ return temp + 0x40;
|
|
+}
|
|
+
|
|
+static int detect_squashfs_partition(struct mtd_info *mtd, unsigned long offset)
|
|
+{
|
|
+ unsigned long temp;
|
|
+ size_t len;
|
|
+ int ret;
|
|
+
|
|
+ ret = mtd->read(mtd, offset, 4, &len, (void *)&temp);
|
|
+ if (ret || len != sizeof(temp))
|
|
+ return 0;
|
|
+
|
|
+ return le32_to_cpu(temp) == SQUASHFS_MAGIC;
|
|
+}
|
|
+
|
|
+static int split_uimage(struct mtd_info *mtd,
|
|
+ const struct mtd_partition *part)
|
|
+{
|
|
+ static struct mtd_partition split_partitions[] = {
|
|
+ {
|
|
+ .name = "kernel",
|
|
+ .offset = 0x0,
|
|
+ .size = 0x0,
|
|
+ }, {
|
|
+ .name = "rootfs",
|
|
+ .offset = 0x0,
|
|
+ .size = 0x0,
|
|
+ },
|
|
+ };
|
|
+
|
|
+ split_partitions[0].size = find_uimage_size(mtd, part->offset);
|
|
+ if (!split_partitions[0].size) {
|
|
+ printk(KERN_NOTICE "no uImage found in linux partition\n");
|
|
+ return -1;
|
|
+ }
|
|
+
|
|
+ if (!detect_squashfs_partition(mtd,
|
|
+ part->offset
|
|
+ + split_partitions[0].size)) {
|
|
+ split_partitions[0].size &= ~(mtd->erasesize - 1);
|
|
+ split_partitions[0].size += mtd->erasesize;
|
|
+ }
|
|
+
|
|
+ split_partitions[0].offset = part->offset;
|
|
+ split_partitions[1].offset = part->offset + split_partitions[0].size;
|
|
+ split_partitions[1].size = part->size - split_partitions[0].size;
|
|
+
|
|
+ add_mtd_partitions(mtd, split_partitions, 2);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+#endif
|
|
+
|
|
/*
|
|
* This function, given a master MTD object and a partition table, creates
|
|
* and registers slave MTD objects which are bound to the master according to
|
|
@@ -894,6 +970,17 @@ int add_mtd_partitions(struct mtd_info *
|
|
|
|
add_mtd_device(&slave->mtd);
|
|
|
|
+#ifdef CONFIG_MTD_UIMAGE_SPLIT
|
|
+ if (!strcmp(parts[i].name, "linux")) {
|
|
+ ret = split_uimage(master, &parts[i]);
|
|
+
|
|
+ if (ret) {
|
|
+ printk(KERN_WARNING
|
|
+ "Can't split linux partition\n");
|
|
+ }
|
|
+ }
|
|
+#endif
|
|
+
|
|
if (!strcmp(parts[i].name, "rootfs")) {
|
|
#ifdef CONFIG_MTD_ROOTFS_ROOT_DEV
|
|
if (ROOT_DEV == 0) {
|