Hi,
On Fri, Apr 15, 2011 at 1:32 AM, Michael Ellerman <mich...@ozlabs.org> wrote:
> From: Michael Ellerman <mich...@ellerman.id.au>
>
> On BOOK3E we don't have an SLB 0, but the equivalent concept is the
> bolted entry mapping the kernel. Currently this is a 1G entry, so
> for now hardcode that. This will probably need to be reworked in
> future.
A year from now when someone sees the ifdef, the above comment would
be nice to have in the code instead of running a git annotate/log to
find out why it's hardcoded the way it is. :)
-Olof
>
> Signed-off-by: Michael Ellerman <mich...@ellerman.id.au>
> ---
> arch/powerpc/kernel/setup_64.c | 4 ++++
> 1 files changed, 4 insertions(+), 0 deletions(-)
>
> diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
> index 91a5cc5..3d0daf4 100644
> --- a/arch/powerpc/kernel/setup_64.c
> +++ b/arch/powerpc/kernel/setup_64.c
> @@ -436,10 +436,14 @@ void __init setup_system(void)
>
> static u64 slb0_limit(void)
> {
> +#ifdef CONFIG_PPC_BOOK3E
> + return 1 << 30;
> +#else
> if (cpu_has_feature(CPU_FTR_1T_SEGMENT)) {
> return 1UL << SID_SHIFT_1T;
> }
> return 1UL << SID_SHIFT;
> +#endif
> }
>
> static void __init irqstack_early_init(void)
> --
> 1.7.1
>
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