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>

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>
Stefan Roese · Luka Perkov
1 parent b81d0ea728
Showing 1 changed file with 3 additions and 0 deletions Side-by-side Diff
arch/arm/mach-mvebu/cpu.c
@@ -240,6 +240,9 @@
 #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();
 }
...	...	@@ -240,6 +240,9 @@
240	240	#ifndef CONFIG_SYS_DCACHE_OFF
241	241	void enable_caches(void)
242	242	{
	243	+ /* Avoid problem with e.g. neta ethernet driver */
	244	+ invalidate_dcache_all();
	245	+
243	246	/* Enable D-cache. I-cache is already enabled in start.S */
244	247	dcache_enable();
245	248	}