On Wed, 2010-02-10 at 14:54 +0100, Stefan Roese wrote: > This patch adds support for boards with more that 512MByte RAM. Currently > only 512MB of memory are enabled in the DCCR/ICCR real-mode cache > control registers. This patch now enables caching in real-mode for > 2GByte.
Should we make that conditional to how much memory is populated ? Or it doesn't matter ? I suppose we don't do IO accesses in real mode anyways so no big deal... Cheers, Ben. > Signed-off-by: Stefan Roese <s...@denx.de> > Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org> > Cc: Josh Boyer <jwbo...@linux.vnet.ibm.com> > --- > arch/powerpc/mm/40x_mmu.c | 4 ++-- > 1 files changed, 2 insertions(+), 2 deletions(-) > > diff --git a/arch/powerpc/mm/40x_mmu.c b/arch/powerpc/mm/40x_mmu.c > index 08dfa8e..65abfcf 100644 > --- a/arch/powerpc/mm/40x_mmu.c > +++ b/arch/powerpc/mm/40x_mmu.c > @@ -84,8 +84,8 @@ void __init MMU_init_hw(void) > * vectors and the kernel live in real-mode. > */ > > - mtspr(SPRN_DCCR, 0xF0000000); /* 512 MB of data space at 0x0. > */ > - mtspr(SPRN_ICCR, 0xF0000000); /* 512 MB of instr. space at > 0x0. */ > + mtspr(SPRN_DCCR, 0xFFFF0000); /* 2GByte of data space at 0x0. > */ > + mtspr(SPRN_ICCR, 0xFFFF0000); /* 2GByte of instr. space at > 0x0. */ > } > > #define LARGE_PAGE_SIZE_16M (1<<24) _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
