--- a/drivers/mtd/Kconfig
+++ b/drivers/mtd/Kconfig
-@@ -23,6 +23,23 @@ config MTD_TESTS
- WARNING: some of the tests will ERASE entire MTD device which they
- test. Do not use these tests unless you really know what you do.
+@@ -12,6 +12,32 @@ menuconfig MTD
+ if MTD
+
++menu "OpenWrt specific MTD options"
++
+config MTD_ROOTFS_ROOT_DEV
+ bool "Automatically set 'rootfs' partition to be root filesystem"
+ default y
+ bool "Automatically split 'rootfs' partition for squashfs"
+ default y
+
-+config MTD_UIMAGE_SPLIT
-+ bool "Automatically split off rootfs from a kernel partition containing a uImage"
++config MTD_SPLIT_FIRMWARE
++ bool "Automatically split firmware partition for kernel+rootfs"
+ default y
+
-+config MTD_UIMAGE_SPLIT_NAME
-+ string "uImage partition name"
-+ depends on MTD_UIMAGE_SPLIT
++config MTD_SPLIT_FIRMWARE_NAME
++ string "Firmware partition name"
++ depends on MTD_SPLIT_FIRMWARE
+ default "firmware"
+
- config MTD_REDBOOT_PARTS
- tristate "RedBoot partition table parsing"
- ---help---
++config MTD_UIMAGE_SPLIT
++ bool "Enable split support for firmware partitions containing a uImage"
++ depends on MTD_SPLIT_FIRMWARE
++ default y
++
++endmenu
++
+ config MTD_TESTS
+ tristate "MTD tests support (DANGEROUS)"
+ depends on m
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
-@@ -29,6 +29,8 @@
+@@ -29,6 +29,7 @@
#include <linux/kmod.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
-+#include <linux/root_dev.h>
+#include <linux/magic.h>
#include <linux/err.h>
#include "mtdcore.h"
-@@ -45,12 +47,14 @@ struct mtd_part {
+@@ -45,13 +46,14 @@ struct mtd_part {
struct list_head list;
};
* the pointer to that structure with this macro.
*/
#define PART(x) ((struct mtd_part *)(x))
--
-+#define IS_PART(mtd) (mtd->_read == part_read)
+-
/*
* MTD methods which simply translate the effective address and pass through
-@@ -533,8 +537,10 @@ out_register:
+ * to the _real_ device.
+@@ -533,8 +535,10 @@ out_register:
return slave;
}
{
struct mtd_partition part;
struct mtd_part *p, *new;
-@@ -566,21 +572,24 @@ int mtd_add_partition(struct mtd_info *m
+@@ -566,21 +570,24 @@ int mtd_add_partition(struct mtd_info *m
end = offset + length;
mutex_lock(&mtd_partitions_mutex);
return ret;
err_inv:
-@@ -590,6 +599,12 @@ err_inv:
+@@ -590,6 +597,12 @@ err_inv:
}
EXPORT_SYMBOL_GPL(mtd_add_partition);
int mtd_del_partition(struct mtd_info *master, int partno)
{
struct mtd_part *slave, *next;
-@@ -613,6 +628,149 @@ int mtd_del_partition(struct mtd_info *m
+@@ -613,6 +626,144 @@ int mtd_del_partition(struct mtd_info *m
}
EXPORT_SYMBOL_GPL(mtd_del_partition);
+ return len;
+}
+
-+#ifdef CONFIG_MTD_ROOTFS_SPLIT
+#define ROOTFS_SPLIT_NAME "rootfs_data"
-+#define ROOTFS_REMOVED_NAME "<removed>"
+
+struct squashfs_super_block {
+ __le32 s_magic;
+ __mtd_add_partition(master, ROOTFS_SPLIT_NAME, split_offset,
+ split_size, false);
+}
-+#endif /* CONFIG_MTD_ROOTFS_SPLIT */
+
-+#ifdef CONFIG_MTD_UIMAGE_SPLIT
+#define UBOOT_MAGIC 0x27051956
+
+static void split_uimage(struct mtd_info *master, struct mtd_part *part)
+ } hdr;
+ size_t len;
+
-+ if (strcmp(part->mtd.name, CONFIG_MTD_UIMAGE_SPLIT_NAME) != 0)
-+ return;
-+
+ if (mtd_read(master, part->offset, sizeof(hdr), &len, (void *) &hdr))
+ return;
+
+ __mtd_add_partition(master, "rootfs", part->offset + len,
+ part->mtd.size - len, false);
+}
++
++#ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
++#define SPLIT_FIRMWARE_NAME CONFIG_MTD_SPLIT_FIRMWARE_NAME
++#else
++#define SPLIT_FIRMWARE_NAME "unused"
+#endif
+
++static void split_firmware(struct mtd_info *master, struct mtd_part *part)
++{
++ if (config_enabled(CONFIG_MTD_UIMAGE_SPLIT))
++ split_uimage(master, part);
++}
++
+void __weak arch_split_mtd_part(struct mtd_info *master, const char *name,
+ int offset, int size)
+{
+}
+
-+
+static void mtd_partition_split(struct mtd_info *master, struct mtd_part *part)
+{
+ static int rootfs_found = 0;
+ if (!strcmp(part->mtd.name, "rootfs")) {
+ rootfs_found = 1;
+
-+#ifdef CONFIG_MTD_ROOTFS_ROOT_DEV
-+ if (ROOT_DEV == 0) {
-+ printk(KERN_NOTICE "mtd: partition \"rootfs\" "
-+ "set to be root filesystem\n");
-+ ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, part->mtd.index);
-+ }
-+#endif
-+#ifdef CONFIG_MTD_ROOTFS_SPLIT
-+ split_rootfs_data(master, part);
-+#endif
++ if (config_enabled(CONFIG_MTD_ROOTFS_SPLIT))
++ split_rootfs_data(master, part);
+ }
+
-+#ifdef CONFIG_MTD_UIMAGE_SPLIT
-+ split_uimage(master, part);
-+#endif
++ if (!strcmp(part->mtd.name, SPLIT_FIRMWARE_NAME) &&
++ config_enabled(CONFIG_MTD_SPLIT_FIRMWARE))
++ split_firmware(master, part);
+
+ arch_split_mtd_part(master, part->mtd.name, part->offset,
+ part->mtd.size);
/*
* 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
-@@ -642,6 +800,7 @@ int add_mtd_partitions(struct mtd_info *
+@@ -642,6 +793,7 @@ int add_mtd_partitions(struct mtd_info *
mutex_unlock(&mtd_partitions_mutex);
add_mtd_device(&slave->mtd);
projects / openwrt.git / blobdiff