Re: Extend grub-ofpathname to behaves like yaboot/ofpath on PowerPC system

[John Paul Adrian Glaubitz]

Hi Mathieu!

On 5/3/19 8:19 AM, Mathieu Malaterre wrote:
> We are looking to extend grub-ofpathname so that it also handles
> PowerPC system such as PowerMac with a limited OpenFirmware
> implementation[1]. In particular the following patch has been found to
> produce an output compatible with such system [2].
> 
> While we understand that components of a path are in this general form:
> 
> <name>@<address>:<arguments>
> 
> We also do understand that name can be safely omitted as the device is
> actually getting located by
> its address. Therefore, these two paths refer to the same device:
> 
> /address@hidden/address@hidden/address@hidden:b
> 
> /@f4000000/@d/@0:b
> 
> However for the PowerMac we tested it on, only the second form has
> been found to be accepted.

Thanks for the detailed explanation and for investigating this! Much
appreciated.

> How best should we provide you with a patch (the current one is kind
> of a hack)? Should we extend grub-ofpathname to take a new parameter
> (eg. `--omit-names`) and decide to print or not the name, would that
> be acceptable ?

This sounds like a very reasonable approach. Let's use either that or
maybe query OpenFirmware whether we're running on a PowerMac, if that's
somehow possible.

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - address@hidden
`. `'   Freie Universitaet Berlin - address@hidden
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913