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 <free.amit.ku...@gmail.com>
wrote:

>
> On Thu, Jun 1, 2017 at 11:07 AM Madhu K <madhu.s...@gmail.com> 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 <madhu.s...@gmail.com> 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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How Kernel command line parameters passed to kernel.

2017-05-31 Thread Madhu K 
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?

Thanks & regards,
Madhu
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