ARC: Invalidate whole SCM before using it

CMD_INCR must be set to be sure that all SCM is invalidated.

Signed-off-by: Vladimir Isaev <isaev@synopsys.com>

Author: Vladimir Isaev

arch/arc/include/asm/cluster.h

@@ -113,6 +113,7 @@ struct bcr_cln_scm_1_cfg {
 #define ARC_CLN_CACHE_CMD_OP_ADDR_INV		0b1101
 #define ARC_CLN_CACHE_CMD_OP_ADDR_CLN		0b1110
 #define ARC_CLN_CACHE_CMD_OP_ADDR_CLN_INV	0b1111
+#define ARC_CLN_CACHE_CMD_INCR			BIT(4)
 
 #define ARC_CLN_CACHE_STATUS			209
 #define ARC_CLN_CACHE_STATUS_BUSY		BIT(23)

arch/arc/mm/cluster.c

@@ -33,7 +33,8 @@ void arc_cluster_scm_enable()
 	arc_cln_write_reg(ARC_CLN_CACHE_STATUS, 0);
 
 	/* Invalidate SCM before enabling. */
-	arc_cln_write_reg(ARC_CLN_CACHE_CMD, ARC_CLN_CACHE_CMD_OP_REG_INV);
+	arc_cln_write_reg(ARC_CLN_CACHE_CMD, ARC_CLN_CACHE_CMD_OP_REG_INV |
+			  ARC_CLN_CACHE_CMD_INCR);
 	while (arc_cln_read_reg(ARC_CLN_CACHE_STATUS) &
 	       ARC_CLN_CACHE_STATUS_BUSY)
 		;