[Skiboot] [PATCH v7 08/22] hdata: Add support for early OPAL crash

[Nicholas Piggin]

Vasant Hegde's on April 13, 2019 7:15 pm:
> Lets hardcode few entries in MDST and MDDT table.. so that we can capture
> early OPAL crash. Note that we will have 1 to 1 mapping between MDST and
> MDDT table entry.

How useful is this? It could be useful if:
- crash is not reproducable, and
- customer site where we can't access the BMC, and
- system eventually boots so crash dump can be saved, and
- dump is sufficient to debug (i.e., debugging does not involve hardware
  registers etc).

I'm a bit skeptical. I reckon we'd get more milage out of changing assert
to trap so we get regs.

Thanks,
Nick