Align test_disk buffer for DMA.

Some targets can only use storage DMA if the memory location is storage
aligned. The required alignment can be more strict than word alignment,
which was used previously. This change ensures that aligned transfers
in test_disk can use DMA.

Change-Id: I605b4d57f9e9c04920587017032f14449645693a

1 files changed, 6 insertions, 4 deletions

diff --git a/apps/plugins/test_disk.c b/apps/plugins/test_disk.c
index ac29f18093..339bcb8020 100644
--- a/apps/plugins/test_disk.c
+++ b/apps/plugins/test_disk.c
@@ -439,7 +439,6 @@ enum plugin_status plugin_start(const void* parameter)
                         "Disk speed", "Write & verify");
     int selected=0;
     bool quit = false;
-    int align;
     DIR *dir;
 
     (void)parameter;
@@ -458,10 +457,13 @@ enum plugin_status plugin_start(const void* parameter)
     }
 
     audiobuf = rb->plugin_get_audio_buffer(&audiobuflen);
+#ifdef STORAGE_WANTS_ALIGN
+    /* align start and length for DMA */
+    STORAGE_ALIGN_BUFFER(audiobuf, audiobuflen);
+#else
     /* align start and length to 32 bit */
-    align = (-(intptr_t)audiobuf) & 3;
-    audiobuf += align;
-    audiobuflen = (audiobuflen - align) & ~3;
+    ALIGN_BUFFER(audiobuf, audiobuflen, 4);
+#endif
 
     rb->srand(*rb->current_tick);