mirror of
git://git.openwrt.org/openwrt/openwrt.git
synced 2024-12-14 10:54:47 +00:00
156 lines
4.3 KiB
Diff
156 lines
4.3 KiB
Diff
From 2a295753a10823a47542c779a25bbb1f52c71281 Mon Sep 17 00:00:00 2001
|
|
From: John Crispin <blogic@openwrt.org>
|
|
Date: Fri, 3 Aug 2012 10:27:13 +0200
|
|
Subject: [PATCH 19/25] owrt mtd split
|
|
|
|
---
|
|
.../mips/include/asm/mach-lantiq/xway/lantiq_soc.h | 1 +
|
|
arch/mips/lantiq/setup.c | 7 +
|
|
drivers/mtd/Kconfig | 4 +
|
|
drivers/mtd/mtdpart.c | 173 +++++++++++++++++++-
|
|
4 files changed, 184 insertions(+), 1 deletions(-)
|
|
|
|
Index: linux-3.9-rc4/drivers/mtd/Kconfig
|
|
===================================================================
|
|
--- linux-3.9-rc4.orig/drivers/mtd/Kconfig 2013-03-27 09:26:32.005789709 +0100
|
|
+++ linux-3.9-rc4/drivers/mtd/Kconfig 2013-03-27 09:26:35.669789796 +0100
|
|
@@ -31,6 +31,10 @@
|
|
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---
|
|
Index: linux-3.9-rc4/drivers/mtd/mtdpart.c
|
|
===================================================================
|
|
--- linux-3.9-rc4.orig/drivers/mtd/mtdpart.c 2013-03-27 09:26:32.281789715 +0100
|
|
+++ linux-3.9-rc4/drivers/mtd/mtdpart.c 2013-03-27 17:20:12.874466937 +0100
|
|
@@ -844,6 +844,99 @@
|
|
}
|
|
#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 be32_to_cpu(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 unsigned long find_squashfs_offset(struct mtd_info *mtd, unsigned long _offset)
|
|
+{
|
|
+ /* scan the first 2MB at 64K offsets */
|
|
+ int i;
|
|
+
|
|
+ for (i = 0; i < 32; i++) {
|
|
+ unsigned long offset = i * 64 * 1024;
|
|
+ if (detect_squashfs_partition(mtd, _offset + offset))
|
|
+ return offset;
|
|
+ }
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+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) {
|
|
+ split_partitions[0].size = find_squashfs_offset(mtd, part->offset);
|
|
+ if (!split_partitions[0].size) {
|
|
+ pr_err("failed to split firmware 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;
|
|
+ } else {
|
|
+ pr_info("found squashfs behind kernel\n");
|
|
+ }
|
|
+
|
|
+ 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
|
|
@@ -860,7 +953,7 @@
|
|
struct mtd_part *slave;
|
|
uint64_t cur_offset = 0;
|
|
int i;
|
|
-#ifdef CONFIG_MTD_ROOTFS_SPLIT
|
|
+#if defined(CONFIG_MTD_ROOTFS_SPLIT) || defined(CONFIG_MTD_UIMAGE_SPLIT)
|
|
int ret;
|
|
#endif
|
|
|
|
@@ -877,6 +970,14 @@
|
|
|
|
add_mtd_device(&slave->mtd);
|
|
|
|
+#ifdef CONFIG_MTD_UIMAGE_SPLIT
|
|
+ if (!strcmp(parts[i].name, "firmware")) {
|
|
+ ret = split_uimage(master, &parts[i]);
|
|
+ if (ret)
|
|
+ printk(KERN_WARNING "Can't split firmware partition\n");
|
|
+ }
|
|
+#endif
|
|
+
|
|
if (!strcmp(parts[i].name, "rootfs")) {
|
|
#ifdef CONFIG_MTD_ROOTFS_ROOT_DEV
|
|
if (ROOT_DEV == 0) {
|