zero_copy in RTEMS

[Gene Smith]

??? wrote, On 12/19/2008 07:14 AM:
> Hi all:
>        Does anyone know how to implement zero copy in RTEMS ?
>        Thanks in advance.

I assume you are referring to the tcp/ip stack? I think some DMA 
controllers can put their inputs and accept outputs directly from BSD 
mbufs (like EMAC on ppc405gpr controller). But I am not sure how many 
other places (or even if) the packets are memcpy'd in the stack.