1 /* 2 * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <arch.h> 8 #include <ccn.h> 9 #include <plat_arm.h> 10 #include <platform_def.h> 11 12 static const unsigned char master_to_rn_id_map[] = { 13 PLAT_ARM_CLUSTER_TO_CCN_ID_MAP 14 }; 15 16 static const ccn_desc_t arm_ccn_desc = { 17 .periphbase = PLAT_ARM_CCN_BASE, 18 .num_masters = ARRAY_SIZE(master_to_rn_id_map), 19 .master_to_rn_id_map = master_to_rn_id_map 20 }; 21 22 CASSERT(PLAT_ARM_CLUSTER_COUNT == ARRAY_SIZE(master_to_rn_id_map), 23 assert_invalid_cluster_count_for_ccn_variant); 24 25 /****************************************************************************** 26 * The following functions are defined as weak to allow a platform to override 27 * the way ARM CCN driver is initialised and used. 28 *****************************************************************************/ 29 #pragma weak plat_arm_interconnect_init 30 #pragma weak plat_arm_interconnect_enter_coherency 31 #pragma weak plat_arm_interconnect_exit_coherency 32 33 34 /****************************************************************************** 35 * Helper function to initialize ARM CCN driver. 36 *****************************************************************************/ 37 void plat_arm_interconnect_init(void) 38 { 39 ccn_init(&arm_ccn_desc); 40 } 41 42 /****************************************************************************** 43 * Helper function to place current master into coherency 44 *****************************************************************************/ 45 void plat_arm_interconnect_enter_coherency(void) 46 { 47 ccn_enter_snoop_dvm_domain(1 << MPIDR_AFFLVL1_VAL(read_mpidr_el1())); 48 } 49 50 /****************************************************************************** 51 * Helper function to remove current master from coherency 52 *****************************************************************************/ 53 void plat_arm_interconnect_exit_coherency(void) 54 { 55 ccn_exit_snoop_dvm_domain(1 << MPIDR_AFFLVL1_VAL(read_mpidr_el1())); 56 } 57
