[U-Boot] [RFC PATCH] arm: bootm: Boot kernel with U-Boot's FDT blob

[Alexander Graf]

On 01/10/2017 05:31 PM, york sun wrote:
> On 01/10/2017 05:02 AM, Alexander Graf wrote:
>> On 01/10/2017 01:58 PM, Michal Simek wrote:
>>> U-Boot configured via DTB can use the same DTB for booting the kernel.
>>> When OF_CONTROL is used fdtcontroladdr is setup and can be use for boot.
>>>
>>> Signed-off-by: Michal Simek <michal.simek at xilinx.com>
>>> ---
>>>
>>> Didn't check if there is any side effect or not but it looks weird when
>>> you have DT driver u-boot that you have to load dtb again.
>> I agree, and I think it's very reasonable to try and use the same device
>> tree for U-Boot and Linux.
>>
> Size is a concern. U-Boot only uses a small portion of the device tree.
> If the complete device tree is embedded into U-Boot, the size increases
> quite a bit.

Is size really a concern? At the end of the day we only care about the 
full dt for non-SPL U-Boot which is reasonably big anyway. And if it's a 
real problem, we can always compress.


Alex