support of arm64 architecture
poggi.raph at gmail.com
Sun Apr 10 23:49:00 PDT 2016
Thank you for your answer.
At the beginning, I have tried to add arm64 specific code on the arm
architecture folder, but it becomes a mess...
Nevertheless, I can give an another try with this solution and then we
2016-04-08 19:30 GMT+02:00 Sascha Hauer <s.hauer at pengutronix.de>:
> Hi Raphaël,
> On Fri, Apr 08, 2016 at 02:01:21PM +0200, Raphaël Poggi wrote:
>> Hi all,
>> I am working on porting barebox on arm64 architecture.
>> So I have some questions about it:
>> - Is there any interest for barebox to support this architecture ?
> Definitely, yes.
>> - My port is running at EL1 for the moment, does the bootloader have
>> to run at EL3 ? If yes, do you have hint to achieve this ?
>> I think UEFI is running at EL3, but I am confused about that,
>> what is the difference between UEFI and barebox ? Are they both
>> booloader ? (I guess it is a "noob" question :/)
> UEFI is an interface to the firmware whereas barebox is a firmware. We
> could implement a UEFI interface for barebox (the U-Boot guys already
> did this). Also barebox can run on top of firmware with a (U)Efi
>> - I have some issues with malloc, when I use tlsf all malloc failed,
>> but not with dlmalloc implementation, do you have an idea about this ?
> Do you have TLSF_64BIT defined? You may have defined it automatically
> when you have CONFIG_64BIT defined, but if not tlsf malloc will not
>> At the moment the current limitations of my port are :
>> - MMU not implemented
>> - barebox running at EL1
>> - barebox env not working
>> - only test on qemu
>> If you want to test it:
> From a first look it the arm64 code looks very familiar. Do you think we
> could merge it into the arm architecture rather than creating a new
> I don't know in which exception level barebox should finally run in, but
> I don't think that's a showstopper.
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