Anyone, Putting together a driver, IMA for ATM in a MPC83xx. Anyway the manual states that one of the data structures for the QE needs to be allocated on a 1MB boundary in external memory.
Normally these come in 128/64/32byte boundaries and are easy to self align, with some bit logic. However, after reading up on dma_alloc_coherent I see that a limitation is that dma cannot span 64K page boundaries. So this begs a question is their a better way to get a 1MB aligned table? Other than allocating almost 2MB of memory and then trying to mask off the LSBs? Seems like an awful waste of memory. I guess the real question is there a better kernel call that returns already aligned DMA memory? Thanks, -Russ _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
