Christophe Leroy <christophe.le...@c-s.fr> writes:
> In transfer_to_handler() (entry_32.S), we have:
>
> #if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
> ...
> #ifdef CONFIG_SMP
> CURRENT_THREAD_INFO(r9, r1)
> lwz r9,TI_CPU(r9)
> slwi r9,r9,3
> add r11,r11,r9
> #endif
> #endif
>
> When running this piece of code, MMU translation is off. But r9 contains
> the virtual addr of current_thread_info, so unless I miss something,
> this cannot work on the 40x, can it ?
>
> On CONFIG_BOOKE it works because phys addr = virt addr
AFAIK 40x can't be SMP:
config SMP
depends on PPC_BOOK3S || PPC_BOOK3E || FSL_BOOKE || PPC_47x
But this stuff is all before my time.
The commit that added the SMP block was clearly only meant for BookE:
4eaddb4d7ec3 ("[POWERPC] Make Book-E debug handling SMP safe")
cheers
