On Thursday, February 14, 2013 9:45:22 pm Adrian Chadd wrote: > On 14 February 2013 13:35, John Baldwin <jhb_at_freebsd.org> wrote: > > > ISA bounces anything above 16GB. They are bouncing. I know it works for some > > people as I fixed a bug in the ISA bounce buffer code somewhat recentish: > > You mean 16MB, right? Yes, doh! > There's a secondary bounce buffer thing needed for 32 bit PCI devices > on a 64 bit machine with > 4 GB of physical RAM, right? That is handled via the tags passed to bus_dma. ISA DMA doesn't currently use bus_dma but reimplements its own bounce handling. -- John BaldwinReceived on Fri Feb 15 2013 - 12:47:39 UTC
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