From: Pavel Pisa <p...@cmp.felk.cvut.cz>
The arm_cp15_data_cache_clean_and_invalidate leads to hang on RPi2,
clean by individual lines works on RPi1 and RPi2.
---
c/src/lib/libbsp/arm/raspberrypi/misc/vc.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/c/src/lib/libbsp/arm/raspberrypi/misc/vc.c
b/c/src/lib/libbsp/arm/raspberrypi/misc/vc.c
index 7bc17ba..0bec0c2 100644
--- a/c/src/lib/libbsp/arm/raspberrypi/misc/vc.c
+++ b/c/src/lib/libbsp/arm/raspberrypi/misc/vc.c
@@ -73,9 +73,20 @@ static inline void
bcm2835_mailbox_buffer_flush_and_invalidate(
*/
rtems_cache_flush_multiple_data_lines( buf, size );
rtems_cache_invalidate_multiple_data_lines( buf, size );
-#else
- /* Flush complete data cache */
+#elif 0
+ /* Flush complete data cache, does not work on RPi2 for some reason */
arm_cp15_data_cache_clean_and_invalidate();
+#else
+ /*
+ * This is temporal workaround for missing cache meanager
+ * which works on RPi2
+ */
+ size += (uintptr_t)buf & ~63;
+ size = (size + 63) & ~63;
+ while ( size ) {
+ size -= 32;
+ arm_cp15_data_cache_clean_and_invalidate_line(buf);
+ }
#endif
}
}
--
1.9.1
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