That's not the nand read address; that's the RAM address where the nand
read command stores data read from nand. The last argument (boot,
recovery) is the nand partition name where it's reading data.
This is how an android kernel+initrd is loaded.
On Monday, March 3, 2014 2:42:17 PM UTC-5, hunter hu wrote:
>
> Hi All,
>
> I am trying to boot from NAND, and using Allwinner lichee-dev branch, in
> the sun5i_a13.h header, there is a section of hard coded environment setup
> like this:
>
> 81 #define CONFIG_EXTRA_ENV_SETTINGS \
> 182 "bootdelay=3\0" \
> 183 "bootcmd=run setargs boot_normal\0" \
> 184 "console=ttyS0,115200\0" \
> 185 "nand_root=/dev/nandd\0" \
> 186 "mmc_root=/dev/mmcblk0p4\0" \
> 187 "init=/init\0" \
> 188 "loglevel=8\0" \
> 189 "setargs=setenv bootargs console=${console} root=${nand_root}" \
> 190 "init=${init} loglevel=${loglevel}\0" \
> 191 "boot_normal=nand read 50000000 boot; boota 50000000\0" \
> 192 "boot_recovery=nand read 50000000 recovery; boota 50000000\0" \
> 193 "boot_fastboot=fastboot\0"
>
> My question is: how do I find the nand read address of my own instead of
> default 50000000?
>
> My nand-part on the tablet looks like:
>
> 9 mbr: version 0x00000100, magic softw311
> 10 2 partitions
> 11 partition 1: class = DISK, name = boot, partition
> start = 32768, partition size = 52768 user_type=0
> 12 partition 2: class = DISK, name = root, partition
> start = 85536, partition size = 15479264 user_type=0
>
> Is that the start of nandb which is 85536 x 512 = 43794432 ?
>
> I also need to change /dev/nandd to /dev/nandb because I boot from the
> second partition /dev/nandb, correct?
>
> Any hints are greatly appreciated,
>
> Cheers,
> -Hunter
>
>
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