diff options
| -rw-r--r-- | sys/arm64/arm64/busdma_bounce.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sys/arm64/arm64/busdma_bounce.c b/sys/arm64/arm64/busdma_bounce.c index 7039153..aff1e23 100644 --- a/sys/arm64/arm64/busdma_bounce.c +++ b/sys/arm64/arm64/busdma_bounce.c @@ -438,6 +438,13 @@ bounce_bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags, mflags |= M_ZERO; if (flags & BUS_DMA_NOCACHE) attr = VM_MEMATTR_UNCACHEABLE; + else if ((flags & BUS_DMA_COHERENT) != 0 && + (dmat->bounce_flags & BF_COHERENT) == 0) + /* + * If we have a non-coherent tag, and are trying to allocate + * a coherent block of memory it needs to be uncached. + */ + attr = VM_MEMATTR_UNCACHEABLE; else attr = VM_MEMATTR_DEFAULT; |
