u-boot

u-boot 8MB nand map::
0x00000000 - 0x00040000 u-boot (256KB == 262144) // +0x40000
0x00040000 - 0x00050000 u-boot-env (64KB == 65536) // +0x10000
0x00050000 - 0x00650000 rootfs (6144KB == 6291456) // +0x600000
0x00650000 - 0x007E0000 uImage (1600KB == 1638400) // +0x190000
0x007E0000 - 0x007F0000 cfg (64KB == 65536) // +0x10000
0x007F0000 - 0x00800000 ART (64KB == 65536) // +0x10000

Helper nand map for easy updates :)
* 0x00050000 - 0x007E0000 firmware (7929856) // +0x790000


u-boot environment::
mtdids=nor0=ar7240-nor0
mtddevnum=0
mtddevname=u-boot
mtdparts=mtdparts=ar7240-nor0:256k(u-boot),64k(u-boot-env),6m(rootfs),1600k(uImage),64k(cfg),64k(ART)

u-boot mtdparts::
device nor0 <ar7240-nor0>, # parts = 6
#: name			size		offset		mask_flags
0: u-boot              	0x00040000	0x00000000	0
1: u-boot-env          	0x00010000	0x00040000	0
2: rootfs              	0x00600000	0x00050000	0
3: uImage              	0x00190000	0x00650000	0
4: cfg                 	0x00010000	0x007e0000	0
5: ART                 	0x00010000	0x007f0000	0
active partition: nor0,0 - (u-boot) 0x00040000 @ 0x00000000

u-boot make mtdparts on NAND::
mtd default

mtd del nor0,5
mtd del nor0,4
mtd del nor0,3
mtd del nor0,2

mtd add nor0 0x600000 rootfs
mtd add nor0 0x190000 uImage
mtd add nor0 0x10000 cfg
mtd add nor0 0x10000 ART

save


1. update kernel
tftp 0x81000000 kernel.lzma.uImage
era 0x9F650000 +0x190000
cp.b 0x81000000 0x9F650000 0x190000

2. update rootfs
tftp 0x80100000 rootfs.ulzma
era 0x9F050000 +0x600000
cp.b 0x80100000 0x9F050000 0x600000

3. update entire firmware image
tftp 0x80100000 elwix_firmware.bin
era 0x9F050000 +0x790000
cp.b 0x80100000 0x9F050000 0x790000

4. update entire firmware image + vendor specific config
tftp 0x80100000 elwix_firmware_vendor.bin
era 0x9F050000 +0x7A0000
cp.b 0x80100000 0x9F050000 0x7A0000