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

Address Conversion

<include\asm\addrspace.h>

CPHYSADDR	get its physical address

SGH_WIKI

Table of Contents

Linux Cache Operation

Address Conversion