---
freebsd/sys/dev/ffec/if_ffec.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/freebsd/sys/dev/ffec/if_ffec.c b/freebsd/sys/dev/ffec/if_ffec.c
index aee2aa64..e8287ed2 100644
--- a/freebsd/sys/dev/ffec/if_ffec.c
+++ b/freebsd/sys/dev/ffec/if_ffec.c
@@ -714,8 +714,16 @@ ffec_encap(struct ifnet *ifp, struct ffec_softc *sc,
struct mbuf *m0,
tx_desc->buf_paddr = segs[i].ds_addr;
tx_desc->flags2 = flags2;
#ifdef __rtems__
- rtems_cache_flush_multiple_data_lines((void *)segs[i].ds_addr,
- segs[i].ds_len);
+ uintptr_t addr_flush = (uintptr_t)segs[i].ds_addr;
+ size_t len_flush = segs[i].ds_len;
+#ifdef CPU_CACHE_LINE_BYTES
+ /* mbufs should be cache line aligned. So we can just round. */
+ addr_flush = addr_flush & ~(CPU_CACHE_LINE_BYTES - 1);
+ len_flush = (len_flush + (CPU_CACHE_LINE_BYTES - 1)) &
+ ~(CPU_CACHE_LINE_BYTES - 1);
+#endif
+ rtems_cache_flush_multiple_data_lines((void*)addr_flush,
+ len_flush);
#endif /* __rtems__ */
if (i == 0) {
--
2.26.2
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