On 10/18/2012 07:47 AM, Rob Herring wrote:
...
> Here is what I mentioned previously. This removes the static mapping from
> the platforms. This is untested and probably breaks on different DEBUG_LL
> options. For now, platforms call debug_ll_io_init, but once all platforms
> are converted, this can be called from devicemaps_init.
> diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
> +void __init debug_ll_io_init(void)
> +{
> + struct map_desc map;
> +
> + if (!IS_ENABLED(CONFIG_DEBUG_LL))
> + return;
> +
> + debug_ll_addr(&map.pfn, &map.virtual);
> + map.pfn = __phys_to_pfn(map.pfn);
> + map.length = PAGE_SIZE;
> + map.type = MT_DEVICE;
> + create_mapping(&map);
> +}
OK, so I just call this new function from Tegra's tegra_map_common_io().
That looks pretty neat. I'll give it a try.
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