[U-Boot] Loop Variable through to user space

[André Schaller]

Hello Albert,

thanks for the information. Do you mean to pass the value using an
environment variable to the boot parameter? How would I approach to set
up an environment variable in the SPL? Wouldn't it increase the memory
footprint such that the SPL wouldn't fit into SRAM anymore?

Best,
André

Am 03.02.15 um 23:27 schrieb Albert ARIBAUD:
> Hello André,
> 
> On Tue, 03 Feb 2015 13:57:28 +0100, André Schaller
> <an.schall at googlemail.com> wrote:
>> Hi all,
>>
>> during the execution of th MLO I create a variable, whose value I want
>> to make accessible to user space applications in Android. How can this
>> be achieved?
>>
>> One way would be to write the contents of the variable to external
>> memory and let it read by the user space process. However, I would need
>> to make sure that during boot no other process is overwriting the address.
>>
>> Do you know of any other ways?
> 
> Kind of a hack, but maybe you could pass the value somehow through the
> kernel boot parameters? I assume that a meaningless parameter does not
> affect the kernel but can still be parsed from /proc/cmdline.
> 
>> Best,
>> André
> 
> Amicalement,
>