On Sun, 2013-08-04 at 08:50 +0800, Kevin Hao wrote: > On Fri, Jul 26, 2013 at 07:17:57PM -0500, Scott Wood wrote: > > >diff --git a/arch/powerpc/mm/fsl_booke_mmu.c > > >b/arch/powerpc/mm/fsl_booke_mmu.c > > >index 8f60ef8..dd283fd 100644 > > >--- a/arch/powerpc/mm/fsl_booke_mmu.c > > >+++ b/arch/powerpc/mm/fsl_booke_mmu.c > > >@@ -224,7 +224,7 @@ void __init adjust_total_lowmem(void) > > > > > > i = switch_to_as1(); > > > __max_low_memory = map_mem_in_cams(ram, CONFIG_LOWMEM_CAM_NUM); > > >- restore_to_as0(i); > > >+ restore_to_as0(i, 0, 0); > > > > The device tree virtual address is zero? > > No. But if the __pa(PAGE_OFFSET in AS0) is equal to __pa(PAGE_OFFSET in AS1), > that mean we don't need to do another relocation and the device tree virtual > address is useless in this case.
The documentation of restore_to_as0() should make it clear that r5 is ignored if r4 is zero. -Scott _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
