mirror of https://github.com/hak5/openwrt.git
71 lines
1.9 KiB
Diff
71 lines
1.9 KiB
Diff
--- a/drivers/mtd/Kconfig
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+++ b/drivers/mtd/Kconfig
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@@ -27,6 +27,11 @@ config MTD_SPLIT_FIRMWARE_NAME
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depends on MTD_SPLIT_FIRMWARE
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default "firmware"
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+config MTD_UIMAGE_SPLIT
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+ bool "Enable split support for firmware partitions containing a uImage"
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+ depends on MTD_SPLIT_FIRMWARE
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+ default y
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+
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source "drivers/mtd/mtdsplit/Kconfig"
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endmenu
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--- a/drivers/mtd/mtdpart.c
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+++ b/drivers/mtd/mtdpart.c
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@@ -696,6 +696,37 @@ mtd_pad_erasesize(struct mtd_info *mtd,
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return len;
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}
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+#define UBOOT_MAGIC 0x27051956
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+
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+static void split_uimage(struct mtd_info *master, struct mtd_part *part)
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+{
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+ struct {
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+ __be32 magic;
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+ __be32 pad[2];
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+ __be32 size;
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+ } hdr;
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+ size_t len;
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+
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+ if (mtd_read(master, part->offset, sizeof(hdr), &len, (void *) &hdr))
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+ return;
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+
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+ if (len != sizeof(hdr) || hdr.magic != cpu_to_be32(UBOOT_MAGIC))
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+ return;
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+
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+ len = be32_to_cpu(hdr.size) + 0x40;
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+ len = mtd_pad_erasesize(master, part->offset, len);
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+ if (len + master->erasesize > part->mtd.size)
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+ return;
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+
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+ if (config_enabled(CONFIG_MTD_SPLIT_UIMAGE_FW))
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+ pr_err("Dedicated partitioner didn't split firmware partition, please fill a bug report!\n");
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+ else
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+ pr_warn("Support for built-in firmware splitter will be removed, please use CONFIG_MTD_SPLIT_UIMAGE_FW\n");
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+
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+ __mtd_add_partition(master, "rootfs", part->offset + len,
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+ part->mtd.size - len, false);
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+}
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+
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#ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
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#define SPLIT_FIRMWARE_NAME CONFIG_MTD_SPLIT_FIRMWARE_NAME
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#else
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@@ -704,7 +735,14 @@ mtd_pad_erasesize(struct mtd_info *mtd,
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static void split_firmware(struct mtd_info *master, struct mtd_part *part)
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{
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- run_parsers_by_type(part, MTD_PARSER_TYPE_FIRMWARE);
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+ int ret;
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+
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+ ret = run_parsers_by_type(part, MTD_PARSER_TYPE_FIRMWARE);
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+ if (ret > 0)
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+ return;
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+
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+ if (config_enabled(CONFIG_MTD_UIMAGE_SPLIT))
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+ split_uimage(master, part);
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}
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void __weak arch_split_mtd_part(struct mtd_info *master, const char *name,
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