cci400.c revision 97043ac98e13a726dbf8b3b41654dca759e3da2c
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 <cci400.h> 32#include <mmio.h> 33#include <platform.h> 34 35static inline unsigned long get_slave_iface_base(unsigned long mpidr) 36{ 37 return CCI400_BASE + SLAVE_IFACE_OFFSET(CCI400_SL_IFACE_INDEX(mpidr)); 38} 39 40void cci_enable_coherency(unsigned long mpidr) 41{ 42 /* Enable Snoops and DVM messages */ 43 mmio_write_32(get_slave_iface_base(mpidr) + SNOOP_CTRL_REG, 44 DVM_EN_BIT | SNOOP_EN_BIT); 45 46 /* Wait for the dust to settle down */ 47 while (mmio_read_32(CCI400_BASE + STATUS_REG) & CHANGE_PENDING_BIT) 48 ; 49} 50 51void cci_disable_coherency(unsigned long mpidr) 52{ 53 /* Disable Snoops and DVM messages */ 54 mmio_write_32(get_slave_iface_base(mpidr) + SNOOP_CTRL_REG, 55 ~(DVM_EN_BIT | SNOOP_EN_BIT)); 56 57 /* Wait for the dust to settle down */ 58 while (mmio_read_32(CCI400_BASE + STATUS_REG) & CHANGE_PENDING_BIT) 59 ; 60} 61 62