On 9/8/20 10:38 PM, Sean Anderson wrote:
On 9/8/20 10:02 PM, Rick Chen wrote:
Hi Sean
On the K210, the prior stage bootloader does not clear IPIs. This presents a problem, because U-Boot up until this point assumes (with one exception) that IPIs are cleared when it starts. This series attempts to fix this in a robust manner, and fix several concurrency bugs I noticed while fixing these other areas. Heinrich previously submitted a patch addressing part of this problem in [1].
[1] https://patchwork.ozlabs.org/project/uboot/patch/20200811035648.3284-1-xypro...
It sounds like that the bootloader does not deal with SMP flow well and jump to u-boot-spl, right ?
I have a question that why not try to fix the prior stage bootloader to clear IPIs correctly?
Because it is a ROM :)
Err, perhaps I should clarify. When I say "prior stage bootloader," I mean that in the general sense of "anything which comes before U-Boot," and not to refer specifically to SPL or TPL. For the k210, this is something akin to the ZSBL on an fu540.
--Sean