On Thu, Nov 30, 2017 at 01:49:43PM -0800, David Daney wrote:
> On 11/30/2017 01:36 PM, James Hogan wrote:
> > On Tue, Nov 28, 2017 at 04:55:34PM -0800, David Daney wrote:
> >> Signed-off-by: Carlos Munoz <cmunoz@xxxxxxxxxx>
> >> Signed-off-by: Steven J. Hill <Steven.Hill@xxxxxxxxxx>
> >> Signed-off-by: David Daney <david.daney@xxxxxxxxxx>
> >> ---
> >> arch/mips/cavium-octeon/setup.c | 6 ++++++
> >> arch/mips/include/asm/octeon/octeon.h | 12 ++++++++++--
> >> 2 files changed, 16 insertions(+), 2 deletions(-)
> >>
> >> diff --git a/arch/mips/cavium-octeon/setup.c b/arch/mips/cavium-octeon/setup.c
> >> index a8034d0dcade..99e6a68bc652 100644
> >> --- a/arch/mips/cavium-octeon/setup.c
> >> +++ b/arch/mips/cavium-octeon/setup.c
> >> @@ -609,6 +609,12 @@ void octeon_user_io_init(void)
> >> #else
> >> cvmmemctl.s.cvmsegenak = 0;
> >> #endif
> >> + if (OCTEON_IS_OCTEON3()) {
> >> + /* Enable LMTDMA */
> >> + cvmmemctl.s.lmtena = 1;
> >> + /* Scratch line to use for LMT operation */
> >> + cvmmemctl.s.lmtline = 2;
> >
> > Out of curiosity, is there significance to the value 2 and associated
> > virtual address 0xffffffffffff8100, or is it pretty arbitrary?
>
> Yes, there is significance.
>
> CPU local memory starts at 0xffffffffffff8000, each line is 0x80 bytes.
> so the 2nd line starts at 0xffffffffffff8100
What I mean is, why is 2 chosen instead of any other value?
Cheers
James
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