Re: How Kernel command line parameters passed to kernel.

2017-06-01 Thread Madhu K 
On Thu, Jun 1, 2017 at 11:27 AM, Amit Kumar 
wrote:

>
> On Thu, Jun 1, 2017 at 11:07 AM Madhu K  wrote:
>
>> Hi All,
>>
>> I have a doubt, how kernel command line parameters are passed to kernel
>> space. Before device tree, we used to pass command line parameters using
>> ATAGS. But after device tree we are not using ATAGS. How we are passing
>> command line parameters to kernel space?
>>
>
> If you are using uboot, please consult uEnv.txt docs.
>  http://linux-sunxi.org/UEnv.txt
>
>>
>>
This is at U-boot level. where u-boot will write this information?


> Thanks & regards,
>> Madhu
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>>
>
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Re: How Kernel command line parameters passed to kernel.

2017-06-01 Thread Amit Kumar 
On Thu, Jun 1, 2017 at 11:07 AM Madhu K  wrote:

> Hi All,
>
> I have a doubt, how kernel command line parameters are passed to kernel
> space. Before device tree, we used to pass command line parameters using
> ATAGS. But after device tree we are not using ATAGS. How we are passing
> command line parameters to kernel space?
>

If you are using uboot, please consult uEnv.txt docs.
 http://linux-sunxi.org/UEnv.txt

>
> Thanks & regards,
> Madhu
> ___
> Kernelnewbies mailing list
> Kernelnewbies@kernelnewbies.org
> https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
kernel_file=zImage
fdtfile=am335x-boneblack.dtb

loadzimage=load mmc ${mmcdev}:${mmcpart} ${loadaddr} ${kernel_file}
loadfdt=load mmc ${mmcdev}:${mmcpart} ${fdtaddr} ${fdtfile}

console=ttyO0,115200n8
mmcroot=/dev/mmcblk0p2 ro
mmcrootfstype=ext4 rootwait

mmcargs=setenv bootargs console=${console} root=${mmcroot} 
rootfstype=${mmcrootfstype} ${optargs}

uenvcmd=run loadzimage; run loadfdt; run mmcargs; bootz ${loadaddr} - ${fdtaddr}
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