miZy disk partitions

note

mizy not use common file systems as ext4 at boot time

linux kernel started from uboot script full mizy image is simple initrd / squashfs image, and loaded from memory

all boot scripts and file writes as raw-data and available via raw-read from disk by offsets

how can i get mizy disk offsets

root@mizy:~# cat /proc/cmdline 
ramdisk_size=16384 mmc_core.removable=1 hdmi.audio=EDID:0 threadirqs  itype=openwrt root=/dev/ram0 rw console=tty1 console=ttyS0,115200 mtdparts=W25q128-flash.0:512k(uboot),64k(script),64k(dtb),3712k(kernel),8256k(initrd),3776k(user),-@0(full) panic=10 consoleblank=0 loglevel=3 sunxi_ve_mem_reserve=0 sunxi_g2d_mem_reserve=0 sunxi_fb_mem_reserve=16 bootfrom=sd loadfrom=MMC0 loadseq=>MMC0 mmcparts=uboot=524288;script=65536;dtb=65536;kernel=3801088;initrd=8454144;user=3866624 btime=2.488

offset note

offset and size for kernel / initrd / user - may be different for another images uboot / script / dtb - usualy not changed

mtd parts

**mtdparts=W25q128-flash.0:512k(uboot),64k(script),64k(dtb),**3712k(kernel),8256k(initrd),3776k(user),-@0(full)

hybrid parts

**mmcparts=uboot=524288;script=65536;dtb=65536;**kernel=3801088;initrd=8454144

print hybrid partitions offsets and size

root@mizy:~# hybrid
dd if=/dev/mmcblk0 bs=4096 skip=131 count=1
[i] size 16777216 + 8192 = 16785408
      part       size     offset
      ----       ----     ------
     uboot     524288          0
    script      65536     524288
       dtb      65536     589824
    kernel    3801088     655360
    initrd    8454144    4456448
      user    3866624   12910592

read/write mizy boot files examples for hybrid (mmc/sd) image

root@mizy:~# hybrid help hybrid

read write mmc hybryd parts / like mtd parts

USAGE

hybrid [in|read|write|out|env|list] name [file]

EXAMPLES

hybrid list					# display hybryd parts
hybrid read dtb | bin2fex > /tmp/script.fex	# read script from disk parse and save 
nano /tmp/script.fex		# change script
fex2bin /tmp/script.fex | hybrid write dtb	# write changed script back to disk

SEE ALSO

hybrid_fex_edit - change fex script and write back (for hybrid mode only)