Subject: [DmaMapping] Questions
To: None <email@example.com>
From: Vikram <firstname.lastname@example.org>
Date: 06/20/2000 14:02:34
I have some questions on DMA mapping.Pls. try to answer them at your
The info I have is ( from man page of bus_dma) :
Perform any pre-read DMA cache and/or bounce operations.
Perform any post-read DMA cache and/or bounce operations.
Perform any pre-write DMA cache and/or bounce operations.
Perform any post-write DMA cache and/or bounce operations.
Now can some one explain me
1) Whart is DMA cacheing?
2) What are these bounce operations?
3) When it is used and it's advantages.