[linuxdc-dev] Maple DMA

[Adrian M. <ad...@mc...>]

I am working on a rewrite of the Maple code in the Linux SH repository.

I want the maple bus to query port on start up to determine which devices=
 are=20
initally attached. So I am building the various MAPLE_COMMAND_DEVINFO buf=
fers=20
to send. Going along slowly, learning as I do it...

But I am wondering what the code below (in the existing driver) does as I=
 have=20
to say my knowledge of DMA is shady


=09for (i=3D0; i<(1<<MAPLE_DMA_PAGES); i++)
=09=09=09dma_cache_wback_inv(maple_sendbuf+i*PAGE_SIZE, PAGE_SIZE);
=09=09

Could someone fill me in?

Thanks

Adrian