Implement basic dma mapping functions. For now just assume every address
is valid for dma mapping.
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
arch/arm/cpu/mmu.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/arch/arm/cpu/mmu.c b/arch/arm/cpu/mmu.c
index fc71cf03cd..6ccd5893b4 100644
--- a/arch/arm/cpu/mmu.c
+++ b/arch/arm/cpu/mmu.c
@@ -598,3 +598,19 @@ void dma_sync_single_for_device(dma_addr_t address, size_t size,
outer_cache.clean_range(address, address + size);
}
}
+
+dma_addr_t dma_map_single(struct device_d *dev, void *ptr, size_t size,
+ enum dma_data_direction dir)
+{
+ unsigned long addr = (unsigned long)ptr;
+
+ dma_sync_single_for_device(addr, size, dir);
+
+ return addr;
+}
+
+void dma_unmap_single(struct device_d *dev, dma_addr_t addr, size_t size,
+ enum dma_data_direction dir)
+{
+ dma_sync_single_for_cpu(addr, size, dir);
+}
--
2.16.1
_______________________________________________
barebox mailing list
barebox@xxxxxxxxxxxxxxxxxxx
http://lists.infradead.org/mailman/listinfo/barebox
