On Tue, Oct 16, 2018 at 5:01 AM Guo Ren <ren_...@c-sky.com> wrote:
>
> This patch adds files related to memory management and here is our
> memory-layout:
>
> Fixmap : 0xffc02000 – 0xfffff000 (4 MB - 12KB)
> Pkmap : 0xff800000 – 0xffc00000 (4 MB)
> Vmalloc : 0xf0200000 – 0xff000000 (238 MB)
> Lowmem : 0x80000000 – 0xc0000000 (1GB)
>
> abiv1 CPU (CK610) is VIPT cache and it doesn't support highmem.
> abiv2 CPUs are all PIPT cache and they could support highmem.
>
> Lowmem is directly mapped by msa0 & msa1 reg, and we needn't setup
> memory page table for it.
>
> Link:https://lore.kernel.org/lkml/20180518215548.gh17...@n2100.armlinux.org.uk/
> Signed-off-by: Guo Ren <ren_...@c-sky.com>
> Cc: Christoph Hellwig <h...@infradead.org>
> Cc: Arnd Bergmann <a...@arndb.de>
Reviewed-by: Arnd Bergmann <a...@arndb.de>
Christoph had all the useful comments on this one, I just checked that I didn't
spot anything beyond that.
Arnd
