On Wed, 2008-04-30 at 10:21 -0500, Scott Wood wrote: > On Wed, Apr 30, 2008 at 05:11:09PM +0200, Joakim Tjernlund wrote: > > Yet the in_bex()/out_bex() functions in PowerPC linux uses sync and all > > SOC drivers are encouraged to use them. What a waste :( > > sync is needed in some of the cases, to sync I/O accesses with DMA buffer > accesses. Ideally, we could trust the driver writers to put > synchronization in where needed, but it seems Linux has too much x86 > heritage for that.
Perhaps, is sync needed in this case for non-smp too? or is eieio enough? Anyway, just have a look at ucc_geth and you will see that most such accesses are just about getting the endian right. > > There should at least be raw alternatives, though... There need be a get-the-endian-right-but-no-sync. After all 2.4 managed well without using the in/out be() functions. Jocke > > -Scott > > ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ U-Boot-Users mailing list U-Boot-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/u-boot-users
