On Dec 17, 2008, at 1:43 PM, Trent Piepho wrote:
Provides a small speedup when accessing pefetchable ranges. To
indicate
that a memory range is prefetchable, mark it in the dts file with
42000000
instead of 02000000.
A powepc pci_controller is allowed three memory ranges, any of which
may be
prefetchable. However, the PCI-PCI bridge configuration space only
has one
field for "non-prefetchable memory behind bridge", which has a 32 bit
address, and one field for "prefetchable memory behind bridge",
which may
have a 64 bit address. These are PCI bus addresses, not CPU physical
addresses.
So really you're only allowed one memory range of each type. And if
you
want the range at a PCI address above 32 bits you must make it
prefetchable.
Signed-off-by: Trent Piepho <tpie...@freescale.com>
---
arch/powerpc/sysdev/fsl_pci.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
applied
- k
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