[U-Boot] [PATCH] ppc/85xx: Fix bug in setup_mp code

[Swarthout Edward L-SWARTHOU]

From: Kumar Gala

> Its possible that we try and copy the boot page code out of flash into

> a DDR location that doesn't have a TLB cover it.  For example, if we 
> have 3G of DDR we typically only map the first 2G.  In the cases of 
> 4G+ this wasn't an issue since the reset page TLB mapping covered the 
> last page of memory which we wanted to copy to.
> 
> We now change the physical address of the reset page TLB to map to the

> true physical location of the boot page code, copy and than set the 
> TLB back to its 1:1 mapping of the reset page.

Why should a boot page TLB still exist?  And if it does exist,
it may be serving a good purpose and shouldn't be touched.

Why not just pick an unused virtual address and map it to bootpg?

This TLB grabbing is giving me problems on my board where I have the
original 1M bootpage mapped to CPC sram and I want to keep active.

-Ed