Re: alpha iommu fixes

Ivan Kokshaysky (ink@jurassic.park.msu.ru)
Sat, 19 May 2001 14:48:15 +0400

On Fri, May 18, 2001 at 10:34:36PM -0400, Tom Vier wrote:
> hose->sg_pci = iommu_arena_new(hose, 0xc0000000, 0x08000000, 32768);
> *(vip)CIA_IOC_PCI_W3_BASE = 0xc0000000 | 1;
> *(vip)CIA_IOC_PCI_W3_MASK = (0x08000000 - 1) & 0xfff00000;
> *(vip)CIA_IOC_PCI_T3_BASE = 0x80000000 >> 2;

This is incorrect. If you want directly mapped PCI window then you don't
need the iommu_arena for it. If you want scatter-gather mapping, you
should write address of the SG page table into the T3_BASE register.

Ivan.
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