[PATCH 1/2] powerpc/85xx: fix problem that prevents PHYS_64BIT from configurable
Timur Tabi
b04825 at freescale.com
Sat Feb 18 08:17:51 EST 2012
Benjamin Herrenschmidt wrote:
> Sorry, I fail to see how... it basically makes all those boards
> non-functional even when enabled...
So you're saying that if we allow 32-bit address spacing for a particular
board, then we must provide a 32-bit DTS to go with it?
I was hoping to use the defconfig to force 36-bit, so that we can have a
32-bit option if we want. Just because we don't put a 32-bit DTS in the
upstream kernel, that doesn't mean that no one is allowed to have a 32-bit
kernel.
> What's wrong with the current scheme ?
It prevents the possibility of creating an "optimized" 32-bit address
environment, for people who have <= 2GB of DDR on the board. If we want
to ship a 32-bit DTS and 32-bit U-Boot on our BSP, then we'll need to
patch the Kconfig to remove the "select" line.
--
Timur Tabi
Linux kernel developer at Freescale
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