Merge pull request #516 from vikramkanigiri/vk/ccn-fix-dvm-entry

Bug fix: Rectify logic to enter or exit from DVM domain

drivers/arm/ccn/ccn.c

@@ -268,7 +268,7 @@ static unsigned long long ccn_master_to_rn_id_map(unsigned long long master_map)
 /*******************************************************************************
  * This function executes the necessary operations to add or remove Request node
  * IDs specified in the 'rn_id_map' bitmap from the snoop/DVM domains specified
- * in the 'hn_id_map'. The 'region_id' specifies the ID of the first HN-F/HN-I
+ * in the 'hn_id_map'. The 'region_id' specifies the ID of the first HN-F/MN
  * on which the operation should be performed. 'op_reg_offset' specifies the
  * type of operation (add/remove). 'stat_reg_offset' specifies the register
  * which should be polled to determine if the operation has completed or not.
@@ -309,35 +309,6 @@ static void ccn_snoop_dvm_do_op(unsigned long long rn_id_map,
 #endif
 }
 
-/*******************************************************************************
- * This function reads the bitmap of Home nodes on the basis of the
- * 'mn_hn_id_reg_offset' parameter from the Miscellaneous node's (MN)
- * programmer's view. The MN has a register which carries the bitmap of present
- * Home nodes of each type i.e. HN-Fs, HN-Is & HN-Ds. It calls
- * 'ccn_snoop_dvm_do_op()' with this information to perform the actual
- * operation.
- ******************************************************************************/
-static void ccn_snoop_dvm_domain_common(unsigned long long rn_id_map,
-					unsigned int hn_op_reg_offset,
-					unsigned int hn_stat_reg_offset,
-					unsigned int mn_hn_id_reg_offset,
-					unsigned int hn_region_id)
-{
-	unsigned long long mn_hn_id_map;
-
-	assert(ccn_plat_desc);
-	assert(ccn_plat_desc->periphbase);
-
-	mn_hn_id_map = ccn_reg_read(ccn_plat_desc->periphbase,
-				    MN_REGION_ID,
-				    mn_hn_id_reg_offset);
-	ccn_snoop_dvm_do_op(rn_id_map,
-			    mn_hn_id_map,
-			    hn_region_id,
-			    hn_op_reg_offset,
-			    hn_stat_reg_offset);
-}
-
 /*******************************************************************************
  * The following functions provide the boot and runtime API to the platform for
  * adding and removing master interfaces from the snoop/DVM domains. A bitmap of
@@ -357,17 +328,18 @@ void ccn_enter_snoop_dvm_domain(unsigned long long master_iface_map)
 	unsigned long long rn_id_map;
 
 	rn_id_map = ccn_master_to_rn_id_map(master_iface_map);
-	ccn_snoop_dvm_domain_common(rn_id_map,
+	ccn_snoop_dvm_do_op(rn_id_map,
+			    CCN_GET_HN_NODEID_MAP(ccn_plat_desc->periphbase,
+						  MN_HNF_NODEID_OFFSET),
+			    HNF_REGION_ID_START,
 			    HNF_SDC_SET_OFFSET,
-				    HNF_SDC_STAT_OFFSET,
-				    MN_HNF_NODEID_OFFSET,
-				    HNF_REGION_ID_START);
-
-	ccn_snoop_dvm_domain_common(rn_id_map,
-				    MN_DDC_SET_OFF,
-				    MN_DDC_STAT_OFFSET,
-				    MN_HNI_NODEID_OFFSET,
-				    MN_REGION_ID);
+			    HNF_SDC_STAT_OFFSET);
+
+	ccn_snoop_dvm_do_op(rn_id_map,
+			    CCN_GET_MN_NODEID_MAP(ccn_plat_desc->periphbase),
+			    MN_REGION_ID,
+			    MN_DDC_SET_OFFSET,
+			    MN_DDC_STAT_OFFSET);
 }
 
 void ccn_exit_snoop_dvm_domain(unsigned long long master_iface_map)
@@ -375,17 +347,18 @@ void ccn_exit_snoop_dvm_domain(unsigned long long master_iface_map)
 	unsigned long long rn_id_map;
 
 	rn_id_map = ccn_master_to_rn_id_map(master_iface_map);
-	ccn_snoop_dvm_domain_common(rn_id_map,
+	ccn_snoop_dvm_do_op(rn_id_map,
+			    CCN_GET_HN_NODEID_MAP(ccn_plat_desc->periphbase,
+						  MN_HNF_NODEID_OFFSET),
+			    HNF_REGION_ID_START,
 			    HNF_SDC_CLR_OFFSET,
-				    HNF_SDC_STAT_OFFSET,
-				    MN_HNF_NODEID_OFFSET,
-				    HNF_REGION_ID_START);
+			    HNF_SDC_STAT_OFFSET);
 
-	ccn_snoop_dvm_domain_common(rn_id_map,
+	ccn_snoop_dvm_do_op(rn_id_map,
+			    CCN_GET_MN_NODEID_MAP(ccn_plat_desc->periphbase),
+			    MN_REGION_ID,
 			    MN_DDC_CLR_OFFSET,
-				    MN_DDC_STAT_OFFSET,
-				    MN_HNI_NODEID_OFFSET,
-				    MN_REGION_ID);
+			    MN_DDC_STAT_OFFSET);
 }
 
 void ccn_enter_dvm_domain(unsigned long long master_iface_map)
@@ -393,11 +366,11 @@ void ccn_enter_dvm_domain(unsigned long long master_iface_map)
 	unsigned long long rn_id_map;
 
 	rn_id_map = ccn_master_to_rn_id_map(master_iface_map);
-	ccn_snoop_dvm_domain_common(rn_id_map,
-				    MN_DDC_SET_OFF,
-				    MN_DDC_STAT_OFFSET,
-				    MN_HNI_NODEID_OFFSET,
-				    MN_REGION_ID);
+	ccn_snoop_dvm_do_op(rn_id_map,
+			    CCN_GET_MN_NODEID_MAP(ccn_plat_desc->periphbase),
+			    MN_REGION_ID,
+			    MN_DDC_SET_OFFSET,
+			    MN_DDC_STAT_OFFSET);
 }
 
 void ccn_exit_dvm_domain(unsigned long long master_iface_map)
@@ -405,11 +378,11 @@ void ccn_exit_dvm_domain(unsigned long long master_iface_map)
 	unsigned long long rn_id_map;
 
 	rn_id_map = ccn_master_to_rn_id_map(master_iface_map);
-	ccn_snoop_dvm_domain_common(rn_id_map,
+	ccn_snoop_dvm_do_op(rn_id_map,
+			    CCN_GET_MN_NODEID_MAP(ccn_plat_desc->periphbase),
+			    MN_REGION_ID,
 			    MN_DDC_CLR_OFFSET,
-				    MN_DDC_STAT_OFFSET,
-				    MN_HNI_NODEID_OFFSET,
-				    MN_REGION_ID);
+			    MN_DDC_STAT_OFFSET);
 }
 
 /*******************************************************************************

drivers/arm/ccn/ccn_private.h

@@ -147,7 +147,7 @@ typedef enum rn_types {
 #define MN_HNI_NODEID_OFFSET	0x01C0
 #define MN_SN_NODEID_OFFSET	0x01D0
 #define MN_DDC_STAT_OFFSET	DOMAIN_CTRL_STAT_OFFSET
-#define MN_DDC_SET_OFF		DOMAIN_CTRL_SET_OFFSET
+#define MN_DDC_SET_OFFSET	DOMAIN_CTRL_SET_OFFSET
 #define MN_DDC_CLR_OFFSET	DOMAIN_CTRL_CLR_OFFSET
 #define MN_ID_OFFSET		REGION_ID_OFFSET
 
@@ -236,4 +236,21 @@ static inline unsigned int count_set_bits(uint64_t bitmap)
  */
 #define FOR_EACH_PRESENT_MASTER_INTERFACE(iface_id, bit_map)	\
 			FOR_EACH_BIT(iface_id, bit_map)
+
+/*
+ * Macro that returns the node id bit map for the Miscellaneous Node
+ */
+#define CCN_GET_MN_NODEID_MAP(periphbase)				\
+	(1 << get_node_id(ccn_reg_read(periphbase, MN_REGION_ID,	\
+						REGION_ID_OFFSET)))
+
+/*
+ * This macro returns the bitmap of Home nodes on the basis of the
+ * 'mn_hn_id_reg_offset' parameter from the Miscellaneous node's (MN)
+ * programmer's view. The MN has a register which carries the bitmap of present
+ * Home nodes of each type i.e. HN-Fs, HN-Is & HN-Ds.
+ */
+#define CCN_GET_HN_NODEID_MAP(periphbase, mn_hn_id_reg_offset)		\
+	ccn_reg_read(periphbase, MN_REGION_ID, mn_hn_id_reg_offset)
+
 #endif /* __CCN_PRIVATE_H__ */