[PATCH 10/15] powerpc: Define slb0_limit() for BOOK3E

[Kumar Gala]

On Apr 15, 2011, at 3:32 AM, Michael Ellerman wrote:

> From: Michael Ellerman <michael at 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.
> 
> Signed-off-by: Michael Ellerman <michael at 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
> }
> 

Let's rename this function to something 'linear_map'.  As on FSL Book-E 64 we do things a bit differently and have more covered in linear map than 1G

> static void __init irqstack_early_init(void)
> -- 
> 1.7.1
> 
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