From: Stefan Roese <sr@denx.de>
Date: Sat, 25 Apr 2015 04:29:55 +0000 (+0200)
Subject: arm: mvebu: Add d-cache invalidate before enabling the d-cache
X-Git-Url: http://git.dujemihanovic.xyz/login.html?a=commitdiff_plain;h=60b75324ea6fb0a72786f3ec36c1057f39ebe2e6;p=u-boot.git

arm: mvebu: Add d-cache invalidate before enabling the d-cache

This solves some RX problems that have been seen, when using the
mvneta ethernet driver. The cache needs to be reset into a "clean"
state before using it.

Signed-off-by: Stefan Roese <sr@denx.de>
Tested-by: Kevin Smith <kevin.smith@elecsyscorp.com>
Tested-by: Dirk Eibach <dirk.eibach@gdsys.cc>
---

diff --git a/arch/arm/mach-mvebu/cpu.c b/arch/arm/mach-mvebu/cpu.c
index 8058fadb22..04681fc5a0 100644
--- a/arch/arm/mach-mvebu/cpu.c
+++ b/arch/arm/mach-mvebu/cpu.c
@@ -240,6 +240,9 @@ int cpu_eth_init(bd_t *bis)
 #ifndef CONFIG_SYS_DCACHE_OFF
 void enable_caches(void)
 {
+	/* Avoid problem with e.g. neta ethernet driver */
+	invalidate_dcache_all();
+
 	/* Enable D-cache. I-cache is already enabled in start.S */
 	dcache_enable();
 }