Re: Flag day for bootloader + kernel?

Quoting Izumi Tsutsui <[email protected]>:

> [email protected] wrote:
>
>> I seem to recall that argv usually just contains flags, while the
>> environment array ($a2, which I think is 'magic' in machdep.c)
>> contains the boot device provided by the PROM environment variables.
>> We do some ugliness in arcemu.c to handle load the kernel from the
>> volume header and return a (hopefully) reasonable OSLoadPartition.
>
> Hmm. A new kernel (with my patch) will try to parse boot device
> as the following order:
>
> (1) bootpath in bootinfo (provided by newer bootloaders)
> (2) argv[1] passed by old bootloaders (which didn't have bootinfo support)
> (3) argv[0], which might be a kernel path loaded directly by ARCBIOS
> (4) "OSLoadPartition" environment
> (5) each argv[n] which contains "OSLoadPartition=foo" strings
>
> On netbooting on IP32, we have to use (3) to recognize boot device
> properly so we have to parse it before (4), and there is no problem
> if (2) and (3) won't break anything on IP12.

I think that'll be fine.

Steve