1 /* 2 * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <arch.h> 32 #include <ccn.h> 33 #include <plat_arm.h> 34 #include <platform_def.h> 35 36 static const unsigned char master_to_rn_id_map[] = { 37 PLAT_ARM_CLUSTER_TO_CCN_ID_MAP 38 }; 39 40 static const ccn_desc_t arm_ccn_desc = { 41 .periphbase = PLAT_ARM_CCN_BASE, 42 .num_masters = ARRAY_SIZE(master_to_rn_id_map), 43 .master_to_rn_id_map = master_to_rn_id_map 44 }; 45 46 CASSERT(PLAT_ARM_CLUSTER_COUNT == ARRAY_SIZE(master_to_rn_id_map), 47 assert_invalid_cluster_count_for_ccn_variant); 48 49 /****************************************************************************** 50 * The following functions are defined as weak to allow a platform to override 51 * the way ARM CCN driver is initialised and used. 52 *****************************************************************************/ 53 #pragma weak plat_arm_interconnect_init 54 #pragma weak plat_arm_interconnect_enter_coherency 55 #pragma weak plat_arm_interconnect_exit_coherency 56 57 58 /****************************************************************************** 59 * Helper function to initialize ARM CCN driver. 60 *****************************************************************************/ 61 void plat_arm_interconnect_init(void) 62 { 63 ccn_init(&arm_ccn_desc); 64 } 65 66 /****************************************************************************** 67 * Helper function to place current master into coherency 68 *****************************************************************************/ 69 void plat_arm_interconnect_enter_coherency(void) 70 { 71 ccn_enter_snoop_dvm_domain(1 << MPIDR_AFFLVL1_VAL(read_mpidr_el1())); 72 } 73 74 /****************************************************************************** 75 * Helper function to remove current master from coherency 76 *****************************************************************************/ 77 void plat_arm_interconnect_exit_coherency(void) 78 { 79 ccn_exit_snoop_dvm_domain(1 << MPIDR_AFFLVL1_VAL(read_mpidr_el1())); 80 } 81