X-Git-Url: http://git.ipfire.org/?p=people%2Fms%2Fu-boot.git;a=blobdiff_plain;f=arch%2Farc%2Flib%2Fcache.c;h=d8741fe959c3fc7ddec39ecaf6bfaa7443cb8d38;hp=cbae27e9fcecb78f49fd422f907515515709b12a;hb=f2a226780fa0e4055bec636b8108bf7e80951174;hpb=d764a20f2bcab2e76bce0751ed125b0c32f9d82f

diff --git a/arch/arc/lib/cache.c b/arch/arc/lib/cache.c
index cbae27e9fc..d8741fe959 100644
--- a/arch/arc/lib/cache.c
+++ b/arch/arc/lib/cache.c
@@ -278,6 +278,13 @@ void invalidate_icache_all(void)
 	/* Any write to IC_IVIC register triggers invalidation of entire I$ */
 	if (icache_status()) {
 		write_aux_reg(ARC_AUX_IC_IVIC, 1);
+		/*
+		 * As per ARC HS databook (see chapter 5.3.3.2)
+		 * it is required to add 3 NOPs after each write to IC_IVIC.
+		 */
+		__builtin_arc_nop();
+		__builtin_arc_nop();
+		__builtin_arc_nop();
 		read_aux_reg(ARC_AUX_IC_CTRL);	/* blocks */
 	}
 }