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 <cci.h> 33 #include <plat_arm.h> 34 #include <platform_def.h> 35 36 static const int cci_map[] = { 37 PLAT_ARM_CCI_CLUSTER0_SL_IFACE_IX, 38 PLAT_ARM_CCI_CLUSTER1_SL_IFACE_IX 39 }; 40 41 /****************************************************************************** 42 * The following functions are defined as weak to allow a platform to override 43 * the way ARM CCI driver is initialised and used. 44 *****************************************************************************/ 45 #pragma weak plat_arm_interconnect_init 46 #pragma weak plat_arm_interconnect_enter_coherency 47 #pragma weak plat_arm_interconnect_exit_coherency 48 49 50 /****************************************************************************** 51 * Helper function to initialize ARM CCI driver. 52 *****************************************************************************/ 53 void plat_arm_interconnect_init(void) 54 { 55 cci_init(PLAT_ARM_CCI_BASE, cci_map, ARRAY_SIZE(cci_map)); 56 } 57 58 /****************************************************************************** 59 * Helper function to place current master into coherency 60 *****************************************************************************/ 61 void plat_arm_interconnect_enter_coherency(void) 62 { 63 cci_enable_snoop_dvm_reqs(MPIDR_AFFLVL1_VAL(read_mpidr_el1())); 64 } 65 66 /****************************************************************************** 67 * Helper function to remove current master from coherency 68 *****************************************************************************/ 69 void plat_arm_interconnect_exit_coherency(void) 70 { 71 cci_disable_snoop_dvm_reqs(MPIDR_AFFLVL1_VAL(read_mpidr_el1())); 72 } 73