BCM2836 (Raspberry Pi 2) port

Stephen Warren swarren at wwwdotorg.org
Tue May 12 09:03:52 PDT 2015

On 05/12/2015 09:39 AM, Alexander Stein wrote:
> On Monday 11 May 2015, 20:36:40 wrote Stephen Warren:
>> On 05/08/2015 10:14 AM, Alexander Stein wrote:
>>> On Thursday 23 April 2015, 22:25:08 wrote Stephen Warren:
>>>>> Hit any key to stop autoboot:  0
>>>>> U-Boot> setenv fdt_high fffffff
>>> Any specific reason to set fdt_high to fffffff?
>> Yes, it prevents U-Boot's annoying habit of moving the DTB from where it
>> was loaded to some other place. This was especially important in this
>> case since I was trying to find out exactly which piece of RAM being
>> over-written caused the issues I was seeing.
> Shouldn't this then be part of the default raspberry (2 only?) environment?

Eventually yes. So far, nobody seems to know which areas of RAM are 
off-limits (presumably since the RAM is used as a CPU1..3 pen), so I was 
experimenting to try and find that out.

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