Atsushi Nemoto wrote:
Hmm... really strange.
This is OK:
lui k1, %highest(kernelsp)
daddiu k1, %higher(kernelsp)
dsll k1, k1, 16
daddiu k1, %hi(kernelsp)
dsll k1, k1, 16
This is NG:
lui k1, %hi(kernelsp)
So, could you try this one?
nop
nop
nop
nop
lui k1, %hi(kernelsp)
If it booted, the problem should be in something irrelevant place.
I.e. this optimization just triggers other bug by code/data movement.
Yup, it booted. On further testing at iluxa's behest, it turns out it may be
some quirk/cpu errata related to the RM5200 I use in my O2. I swapped it out
for a plain R5000 @ 200MHz, and removed the nop's -- boots fine.
This may also explain why the cobalt's were hitting something odd. They also
use a member of the RM52xx family (RM5231 iirc, O2 uses an RM5261).
--Kumba
--
Gentoo/MIPS Team Lead
"Such is oft the course of deeds that move the wheels of the world: small hands
do them because they must, while the eyes of the great are elsewhere." --Elrond
