1 /* 2 * Copyright (c) 2013-2014, 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 <assert.h> 33 #include <cci400.h> 34 #include <mmio.h> 35 36 #define MAX_CLUSTERS 2 37 38 static unsigned long cci_base_addr; 39 static unsigned int cci_cluster_ix_to_iface[MAX_CLUSTERS]; 40 41 42 void cci_init(unsigned long cci_base, 43 int slave_iface3_cluster_ix, 44 int slave_iface4_cluster_ix) 45 { 46 /* 47 * Check the passed arguments are valid. The cluster indices must be 48 * less than MAX_CLUSTERS, not the same as each other and at least one 49 * of them must be refer to a valid cluster index. 50 */ 51 assert(cci_base); 52 assert(slave_iface3_cluster_ix < MAX_CLUSTERS); 53 assert(slave_iface4_cluster_ix < MAX_CLUSTERS); 54 assert(slave_iface3_cluster_ix != slave_iface4_cluster_ix); 55 assert((slave_iface3_cluster_ix >= 0) || 56 (slave_iface3_cluster_ix >= 0)); 57 58 cci_base_addr = cci_base; 59 if (slave_iface3_cluster_ix >= 0) 60 cci_cluster_ix_to_iface[slave_iface3_cluster_ix] = 61 SLAVE_IFACE3_OFFSET; 62 if (slave_iface4_cluster_ix >= 0) 63 cci_cluster_ix_to_iface[slave_iface4_cluster_ix] = 64 SLAVE_IFACE4_OFFSET; 65 } 66 67 static inline unsigned long get_slave_iface_base(unsigned long mpidr) 68 { 69 /* 70 * We assume the TF topology code allocates affinity instances 71 * consecutively from zero. 72 * It is a programming error if this is called without initializing 73 * the slave interface to use for this cluster. 74 */ 75 unsigned int cluster_id = 76 (mpidr >> MPIDR_AFF1_SHIFT) & MPIDR_AFFLVL_MASK; 77 78 assert(cluster_id < MAX_CLUSTERS); 79 assert(cci_cluster_ix_to_iface[cluster_id] != 0); 80 81 return cci_base_addr + cci_cluster_ix_to_iface[cluster_id]; 82 } 83 84 void cci_enable_cluster_coherency(unsigned long mpidr) 85 { 86 assert(cci_base_addr); 87 /* Enable Snoops and DVM messages */ 88 mmio_write_32(get_slave_iface_base(mpidr) + SNOOP_CTRL_REG, 89 DVM_EN_BIT | SNOOP_EN_BIT); 90 91 /* Wait for the dust to settle down */ 92 while (mmio_read_32(cci_base_addr + STATUS_REG) & CHANGE_PENDING_BIT) 93 ; 94 } 95 96 void cci_disable_cluster_coherency(unsigned long mpidr) 97 { 98 assert(cci_base_addr); 99 /* Disable Snoops and DVM messages */ 100 mmio_write_32(get_slave_iface_base(mpidr) + SNOOP_CTRL_REG, 101 ~(DVM_EN_BIT | SNOOP_EN_BIT)); 102 103 /* Wait for the dust to settle down */ 104 while (mmio_read_32(cci_base_addr + STATUS_REG) & CHANGE_PENDING_BIT) 105 ; 106 } 107 108
