Messages in this thread | | | Date | Tue, 02 Jun 2009 13:11:17 +0200 | From | Michal Simek <> | Subject | Re: [PATCH] asm-generic: add dma-mapping-linear.h |
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Arnd Bergmann wrote: > On Monday 01 June 2009, Michal Simek wrote: > > >> Microblaze have it but it is not cleared(checked) and not in mainline - >> I want to look at it when mmu is in mainline. >> As I wrote before you can use Microblaze as tested arch. >> > > Ok. It should become really easy once the asm-generic version is there. > Do you know if all DMA capable devices on microblaze are coherent > (or if all of them are noncoherent)? > We don't have cache coherency modul.
> If it is indeed coherent, the below code should be enough, otherwise > you need to add some cache flushes in the functions below. > I'll send you special email about to find out proper solution for Microblaze.
Michal > Arnd <>< > > --- > #ifndef _ASM_MICROBLAZE_DMA_MAPPING_H > #define _ASM_MICROBLAZE_DMA_MAPPING_H > > static inline int > __dma_coherent_dev(struct device *dev) > { > return 1; > } > > static inline void > dma_cache_sync(struct device *dev, void *cpu_addr, size_t size, > enum dma_data_direction direction) > { > } > > static inline int dma_get_cache_alignment(void) > { > return 1 << L1_CACHE_SHIFT; > } > > #include <asm-generic/dma-mapping-linear.h> > > #endif _ASM_MICROBLAZE_DMA_MAPPING_H >
-- Michal Simek, Ing. (M.Eng) PetaLogix - Linux Solutions for a Reconfigurable World w: www.petalogix.com p: +61-7-30090663,+42-0-721842854 f: +61-7-30090663
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