command bootu to start kernel

[Marc Kleine-Budde]

On 10/29/2010 11:04 AM, Belisko Marek wrote:
> On Fri, Oct 29, 2010 at 10:50 AM, Marc Kleine-Budde <mkl at pengutronix.de> wrote:
>> On 10/29/2010 10:45 AM, Belisko Marek wrote:
>>> HI Baruch,
>>>
>>> On Fri, Oct 29, 2010 at 10:34 AM, Baruch Siach <baruch at tkos.co.il> wrote:
>>>> Hi Belisko,
>>>>
>>>> On Fri, Oct 29, 2010 at 10:20:46AM +0200, Belisko Marek wrote:
>>>>> I have 2.6.32 kernel but early_printk isn't available and I enable
>>>>> lowlevel debugging but
>>>>> don't get nothing else on console. Anyway thanks.
>>>>
>>>> Try this patch to see the low level console output:
>>>>
>>>> commit 5c31454464ed655401c31c68c895b16eafd2bde5
>>>> Author: Baruch Siach <baruch at tkos.co.il>
>>>> Date:   Mon Jan 19 10:41:47 2009 +0200
>>>>
>>>>    arm, printk: the famous printascii() hack
>>>>
>>>> diff --git a/kernel/printk.c b/kernel/printk.c
>>>> index 5052b54..d685f8a 100644
>>>> --- a/kernel/printk.c
>>>> +++ b/kernel/printk.c
>>>> @@ -685,6 +685,10 @@ asmlinkage int vprintk(const char *fmt, va_list args)
>>>>        /* Emit the output into the temporary buffer */
>>>>        printed_len += vscnprintf(printk_buf + printed_len,
>>>>                                  sizeof(printk_buf) - printed_len, fmt, args);
>>>> +       {
>>>> +               extern void printascii(const char *);
>>>> +               printascii(printk_buf);
>>>> +       }
>>>>
>>>>
>>>>        /*
>>>>
>>>> --
>>>>                                                     ~. .~   Tk Open Systems
>>>> =}------------------------------------------------ooO--U--Ooo------------{=
>>>>   - baruch at tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -
>>>>
>>> Patch works like charm. Output from my kernel startup:
>>>
>>> <5>Linux version 2.6.32-rc8 (open-nandra at linux) (gcc version 4.3.5
>>> (Buildroot 2010.08-rc1) ) #14 Fri Oct 29 10:40:20 CEST 2010
>>> CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177
>>> CPU: VIVT data cache, VIVT instruction cache
>>> Machine: MINI2440
>>> Memory policy: ECC disabled, Data cache writeback
>>> <7>On node 0 totalpages: 0
>>> <1>bootmem alloc of 32768 bytes failed!
>>> <0>Kernel panic - not syncing: Out of memory
>>
>> 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.

Cheers, Marc
-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
Vertretung West/Dortmund          | Fax:   +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686  | http://www.pengutronix.de   |

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