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Commit ef7cc35b authored by James Bottomley's avatar James Bottomley Committed by James Bottomley
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parisc: add mm API for DMA to vmalloc/vmap areas 



We already have an API to flush a kernel page along an alias
address, so use it.  The TLB purge prevents the CPU from doing
speculative moveins on the flushed address, so we don't need to
implement and invalidate.

Acked-by: default avatarKyle McMartin <kyle@mcmartin.ca>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
parent 9df5f741

arch/parisc/include/asm/cacheflush.h

+12 −0
Original line number Original line Diff line number Diff line
@@ -38,6 +38,18 @@ void flush_cache_mm(struct mm_struct *mm); 




#define flush_kernel_dcache_range(start,size) \

#define flush_kernel_dcache_range(start,size) \

	flush_kernel_dcache_range_asm((start), (start)+(size));

	flush_kernel_dcache_range_asm((start), (start)+(size));

/* vmap range flushes and invalidates.  Architecturally, we don't need

 * the invalidate, because the CPU should refuse to speculate once an

 * area has been flushed, so invalidate is left empty */

static inline void flush_kernel_vmap_range(void *vaddr, int size)

{

	unsigned long start = (unsigned long)vaddr;



	flush_kernel_dcache_range_asm(start, start + size);

}

static inline void invalidate_kernel_vmap_range(void *vaddr, int size)

{

}





#define flush_cache_vmap(start, end)		flush_cache_all()

#define flush_cache_vmap(start, end)		flush_cache_all()

#define flush_cache_vunmap(start, end)		flush_cache_all()

#define flush_cache_vunmap(start, end)		flush_cache_all()