On Thu, 2009-12-03 at 21:34 +0100, Albert Herranz wrote:
> Add a set of entries to the fixmap table to allow usage of known
> reserved virtual address space by early debug code.
>
> The address space reserved is the top 128K of the 32-bit address
> space. This allows, if required, the use of a BAT to do the mappings.
>
> Signed-off-by: Albert Herranz <albert_herr...@yahoo.es>
Acked-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
That will do for now. I have ideas to clean it up a bit but for now it's
fine.
> ---
> arch/powerpc/include/asm/fixmap.h | 3 +++
> 1 files changed, 3 insertions(+), 0 deletions(-)
>
> diff --git a/arch/powerpc/include/asm/fixmap.h
> b/arch/powerpc/include/asm/fixmap.h
> index f1f4e23..5c2c023 100644
> --- a/arch/powerpc/include/asm/fixmap.h
> +++ b/arch/powerpc/include/asm/fixmap.h
> @@ -44,6 +44,9 @@
> */
> enum fixed_addresses {
> FIX_HOLE,
> + /* reserve the top 128K for early debugging purposes */
> + FIX_EARLY_DEBUG_TOP = FIX_HOLE,
> + FIX_EARLY_DEBUG_BASE = FIX_EARLY_DEBUG_TOP+((128*1024)/PAGE_SIZE)-1,
> #ifdef CONFIG_HIGHMEM
> FIX_KMAP_BEGIN, /* reserved pte's for temporary kernel mappings */
> FIX_KMAP_END = FIX_KMAP_BEGIN+(KM_TYPE_NR*NR_CPUS)-1,
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