The busdma shouldn't try to flush or invalidate cache in a nocache area.
---
rtemsbsd/rtems/rtems-kernel-bus-dma.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/rtemsbsd/rtems/rtems-kernel-bus-dma.c
b/rtemsbsd/rtems/rtems-kernel-bus-dma.c
index 4dc634f3..bda4f3d7 100644
--- a/rtemsbsd/rtems/rtems-kernel-bus-dma.c
+++ b/rtemsbsd/rtems/rtems-kernel-bus-dma.c
@@ -48,6 +48,8 @@
#include <machine/rtems-bsd-kernel-space.h>
#include <machine/rtems-bsd-cache.h>
#include <machine/rtems-bsd-bus-dma.h>
+#include <bsp.h>
+#include <bsp/linker-symbols.h>
#include <rtems/malloc.h>
@@ -400,6 +402,12 @@ bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map,
bus_dmasync_op_t op)
uintptr_t size = map->buffer_size;
uintptr_t begin = (uintptr_t) map->buffer_begin;
uintptr_t end = begin + size;
+#ifdef __arm__
+ if (begin >= (uintptr_t)bsp_section_nocache_begin &&
+ end <= (uintptr_t)bsp_section_nocachenoload_end) {
+ return;
+ }
+#endif
if ((map->flags & DMAMAP_CACHE_ALIGNED) != 0) {
begin &= ~CLMASK;
--
2.26.2
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