[U-Boot] [PATCH v7 00/15] SiFive FU540 Support

[Alexander Graf]

On 13.02.19 02:31, Bin Meng wrote:
> On Tue, Feb 12, 2019 at 6:23 PM Andreas Schwab <schwab at suse.de> wrote:
>>
>> On Feb 12 2019, Bin Meng <bmeng.cn at gmail.com> wrote:
>>
>>> The env var is stored in whatever supported media in U-Boot. Not like
>>> PCI NICs which normally have EEPROM to store pre-flashed MAC address
>>> by their vendors, for most embedded network controllers in the SoC,
>>> normally there is no hardware provided mechanism to ensure a unique
>>> MAC address, instead it relies on software to program one to the
>>> hardware before bringing it up.
>>
>> On the Hifive the MAC is part of the initial DT, so there is no need to
>> use a secondary store.
>>
> 
> So for the HiFive board, who is supposed to guarantee the uniqueness
> of the MAC address? Does SiFive program DT with different MAC to every
> board they shipped? If so, we can just read  "local-mac-address" from
> DT in U-Boot.

The DT is supplied via SD card, just like U-Boot is. So it's up to the
user to modify the DT and ensure that it contains a unique MAC address.


Alex