[U-Boot] [PATCH 7/9] CACHE: net: Test if start address is aligned

[Marek Vasut]

This prevents the scenario where data cache is on and the
device uses DMA to deploy data. In that case, it might not
be possible to flush/invalidate data to RAM properly. The
other option is to use bounce buffer, but that involves a
lot of copying and therefore degrades performance rapidly.
Therefore disallow this possibility of unaligned load address
altogether if data cache is on.

Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Joe Hershberger <joe.hershberger at gmail.com>
---
 common/cmd_net.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/common/cmd_net.c b/common/cmd_net.c
index a9ade8b..917061b 100644
--- a/common/cmd_net.c
+++ b/common/cmd_net.c
@@ -242,6 +242,10 @@ static int netboot_common(enum proto_t proto, cmd_tbl_t *cmdtp, int argc,
 		bootstage_error(BOOTSTAGE_ID_NET_START);
 		return CMD_RET_USAGE;
 	}
+
+	if (!cacheline_aligned(load_addr))
+		return 1;
+
 	bootstage_mark(BOOTSTAGE_ID_NET_START);
 
 	if ((size = NetLoop(proto)) < 0) {
-- 
1.7.10