mywiki:linux:cache
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Linux Cache Operation
| opt | Term | API |
| Invalidate | stale data problem | dma_cache_inv(unsigned long address unsigned long size) |
| Flush/write back | any dirty cache | dma_cache_wback/dma_cache_wback_inv(unsigned long address, unsigned long size) |
Note: For dma_cache_wback, in theory, for write back caches an invalidate kills the cache line only without actually writing the data out, thus destroying the data in the cache. A safer thing to do in this case is issue a flush and invalidate instruction
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