Re: command bootu to start kernel

[Belisko Marek <marek.belisko@gmail.com>]

On Fri, Oct 29, 2010 at 2:36 PM, Juergen Beisert <jbe@pengutronix.de> wrote:
> Belisko Marek wrote:
>> On Fri, Oct 29, 2010 at 11:26 AM, Marc Kleine-Budde <mkl@pengutronix.de>
> wrote:
>> > On 10/29/2010 11:21 AM, Belisko Marek wrote:
>> >>>>> do you have a "MEM=32" on your command line?
>> >>>>
>> >>>> Well I add it but same result:
>> >>>
>> >>> BTW: It must be "mem=", in lowercase, but you did this.
>> >>>
>> >>> What I was meant to ask was, if you forget to add the "M" to "32".
>> >>> Because with mem=32 you tell Linux just to use 32 bytes of memory.
>> >>> Maybe your ATAGs are broken, Linux might not see the whole RAM or any
>> >>> if it.
>> >>
>> >> yes it was typo I forgot put M after 32. Kernel now properly boot :).
>> >
>> > How much RAM you you have? Adjust mem= accordingly.
>>
>> Have 64M I will adjust.
>>
>> >> U-boot somehow
>> >> add kernel this parameter? Because for u-boot I don't need to set this
>> >> parameter.
>> >
>> > Nope - u-boot and barebox set up this information in the ATAG list.
>> > Seems something is broken with your ATAG list.
>>
>> Could be a problem thats I load barebox directly to ram and run it and
>> then RAM size isn't probed
>> and correctly set in atags?
>
> No, you need something like that:
>
> [...]
> static struct memory_platform_data ram_pdata = {
>        .name           = "ram0",
>        .flags          = DEVFS_RDWR,
> };
>
> struct device_d mini_sdram_dev = {
>        .id             = -1,
>        .name           = "mem",
>        .map_base       = CS6_BASE,
>        .size           = 64 * 1024 * 1024,
>        .platform_data  = &ram_pdata,
> };
Suppose similar must be done for a9m24xx boards?
>
> [...]
>
> static int mini2440_devices_init(void)
> {
> [...]
>        register_device(&mini2440_sdram_dev);
> [...]
>        armlinux_add_dram(&mini2440_sdram_dev);
> [...]
> }
>
> jbe
>
> --
> Pengutronix e.K.                              | Juergen Beisert             |
> Linux Solutions for Science and Industry      | Phone: +49-8766-939 228     |
> Vertretung Sued/Muenchen, Germany             | Fax:   +49-5121-206917-5555 |
> Amtsgericht Hildesheim, HRA 2686              | http://www.pengutronix.de/  |
>

thanks,

marek

-- 
as simple and primitive as possible
-------------------------------------------------
Marek Belisko - OPEN-NANDRA
Freelance Developer

Ruska Nova Ves 219 | Presov, 08005 Slovak Republic
Tel: +421 915 052 184
skype: marekwhite
icq: 290551086
web: http://open-nandra.com

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