Subject: Re: Porting RapidIO from ppc arch to powerpc arch in support of MPC8641D

From: Segher Boessenkool <[email-masked]>
Date: Wed, 23 May 2007 18:05:43 +0200

>> The law should really be removed.
> In my application I'm may be using a huge part of the 36-bit address
> space to address multiple remote RIO boards in a peer DMA multicomputer
> application. The default law just for maintenance messages isn't going
> to cut it.

If the firmware sets up the "law", it should put a property
in the node describing the setting.  If Linux sets up the
laws, there shouldn't be a property (since it is a policy
decision).

>>> The dbells and mboxs can be removed. The default setting in rio is 
>>> okay.
>>
>> this could possibly be useful.

Same issue.  Even if the firmware uses a default setting,
it should still put it in the device tree _iff_ it is the
firmware's decision (and not the kernel's).

Segher