From: Chris Johns <chr...@rtems.org>
- memset may be optimized for performance and might work
with device type memory. Clear a byte at a time.
---
rtemsbsd/rtems/rtems-kernel-bus-dma.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/rtemsbsd/rtems/rtems-kernel-bus-dma.c
b/rtemsbsd/rtems/rtems-kernel-bus-dma.c
index 45c4287d..1d28f62c 100644
--- a/rtemsbsd/rtems/rtems-kernel-bus-dma.c
+++ b/rtemsbsd/rtems/rtems-kernel-bus-dma.c
@@ -9,7 +9,7 @@
*/
/*
- * Copyright (c) 2009-2012 embedded brains GmbH.
+ * Copyright (c) 2009-2012 embedded brains GmbH.
* All rights reserved.
*
* embedded brains GmbH
@@ -258,7 +258,12 @@ bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int
flags,
(*mapp)->buffer_size = dmat->maxsize;
if ((flags & BUS_DMA_ZERO) != 0) {
- memset(*vaddr, 0, dmat->maxsize);
+ unsigned char* mem = *vaddr;
+ int len = dmat->maxsize;
+ while (len-- > 0) {
+ bsp_bus_space_write_1(mem, 0);
+ mem++;
+ }
}
return (0);
--
2.19.1
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