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| author | Mark Maule <maule@sgi.com> | 2005-04-25 13:18:02 -0700 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2005-04-25 13:18:02 -0700 |
| commit | 4628d7cada7a19166ba8fe57f5ef0f0009694e1e (patch) | |
| tree | 86fa31598303768755a4caeee662b4c999c3a929 /arch/ia64/sn/pci/tioca_provider.c | |
| parent | e96c9b4779e651a7469bea677be3a08f70be399e (diff) | |
| download | blackbird-op-linux-4628d7cada7a19166ba8fe57f5ef0f0009694e1e.tar.gz blackbird-op-linux-4628d7cada7a19166ba8fe57f5ef0f0009694e1e.zip | |
[IA64-SGI] disable TIOCA GART TLB prefetching
Patch to disable SGI TIOCA GART TLB prefetching due to hw bug.
Signed-off-by: Mark Maule <maule@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/sn/pci/tioca_provider.c')
| -rw-r--r-- | arch/ia64/sn/pci/tioca_provider.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/ia64/sn/pci/tioca_provider.c b/arch/ia64/sn/pci/tioca_provider.c index 2234d61cdd4b..54a0dd447e76 100644 --- a/arch/ia64/sn/pci/tioca_provider.c +++ b/arch/ia64/sn/pci/tioca_provider.c @@ -171,15 +171,15 @@ tioca_gart_init(struct tioca_kernel *tioca_kern) * use agp op-combining * use GET semantics to fetch memory * participate in coherency domain - * prefetch TLB entries + * DISABLE GART PREFETCHING due to hw bug tracked in SGI PV930029 */ ca_base->ca_control1 |= CA_AGPDMA_OP_ENB_COMBDELAY; /* PV895469 ? */ ca_base->ca_control2 &= ~(CA_GART_MEM_PARAM); ca_base->ca_control2 |= (0x2ull << CA_GART_MEM_PARAM_SHFT); tioca_kern->ca_gart_iscoherent = 1; - ca_base->ca_control2 |= - (CA_GART_WR_PREFETCH_ENB | CA_GART_RD_PREFETCH_ENB); + ca_base->ca_control2 &= + ~(CA_GART_WR_PREFETCH_ENB | CA_GART_RD_PREFETCH_ENB); /* * Unmask GART fetch error interrupts. Clear residual errors first. |
