[lkml]   [2002]   [Jun]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: PCI DMA to small buffers on cache-incoherent arch
   From: "Albert D. Cahalan" <>
Date: Sat, 8 Jun 2002 21:30:31 -0400 (EDT)

On a non-SMP system, would it be OK to map all the memory
without memory coherency enabled? You seem to be implying that
one only needs to implement some mechanism in pci_map_single()
to handle flushing cache lines (write back, then invalidate).

This would be useful for Macs.

It's just avoiding flushing by effecting flushing the cache after
every load/store the cpu does, so of course it would work.

It would be slow as hell, but it would work.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:26    [W:1.700 / U:2.088 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site