[U-Boot] [PATCH 05/11] powerpc/mpc85xx: use boot page translation for spin table address

[Scott Wood]

On 08/24/2012 06:06 PM, York Sun wrote:
> On 08/24/2012 03:55 PM, Scott Wood wrote:
>> On 08/17/2012 01:27 PM, York Sun wrote:
>>> E6500 doesn't allow cache inhibit TLB alias. Use the boot page
>>> translation
>>> instead. The boot page is always cache inhibit.
>>
>> We're not supposed to create such aliases on any PPC core.
> 
> We seem to have been using it for quite a while, until it is broken here.

Just because there wasn't a cop behind the billboard doesn't mean we
weren't speeding. :-)

I've gotten machine checks on p4080 from such aliases under specific
circumstances (just not in the specific case of what U-Boot does).

>> Please move to a cacheable spintable as described in ePAPR 1.1.  This
>> probably means not using the boot page window to access it.
>>
> No objection here.

While we're touching the spin table stuff, we really should fix the bug
that we don't load the upper half of r3 on 64-bit so at least on
non-e5500 we won't have old U-Boots floating around that don't do it.

-Scott