On Wed, Oct 17, 2018 at 05:06:56PM +0200, Arnd Bergmann wrote: > On Tue, Oct 16, 2018 at 5:01 AM Guo Ren <ren_guo@xxxxxxxxx> 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.GH17671@xxxxxxxxxxxxxxxxxxxxx/ > > Signed-off-by: Guo Ren <ren_guo@xxxxxxxxx> > > Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx> > > Cc: Arnd Bergmann <arnd@xxxxxxxx> > > Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx> > > Christoph had all the useful comments on this one, I just checked that I didn't > spot anything beyond that. Yes, Christoph help a lot and find a critical bug of "sync_dma > 4K". Best Regards Guo Ren
