1 /*
2  * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
3  *
4  * SPDX-License-Identifier: BSD-3-Clause
5  */
6 
7 #include <platform_def.h>
8 
9 #include <arch.h>
10 #include <drivers/arm/cci.h>
11 #include <lib/utils.h>
12 #include <plat/arm/common/plat_arm.h>
13 
14 static const int cci_map[] = {
15 	PLAT_ARM_CCI_CLUSTER0_SL_IFACE_IX,
16 	PLAT_ARM_CCI_CLUSTER1_SL_IFACE_IX
17 };
18 
19 /******************************************************************************
20  * The following functions are defined as weak to allow a platform to override
21  * the way ARM CCI driver is initialised and used.
22  *****************************************************************************/
23 #pragma weak plat_arm_interconnect_init
24 #pragma weak plat_arm_interconnect_enter_coherency
25 #pragma weak plat_arm_interconnect_exit_coherency
26 
27 
28 /******************************************************************************
29  * Helper function to initialize ARM CCI driver.
30  *****************************************************************************/
plat_arm_interconnect_init(void)31 void __init plat_arm_interconnect_init(void)
32 {
33 	cci_init(PLAT_ARM_CCI_BASE, cci_map, ARRAY_SIZE(cci_map));
34 }
35 
36 /******************************************************************************
37  * Helper function to place current master into coherency
38  *****************************************************************************/
plat_arm_interconnect_enter_coherency(void)39 void plat_arm_interconnect_enter_coherency(void)
40 {
41 	cci_enable_snoop_dvm_reqs(MPIDR_AFFLVL1_VAL(read_mpidr_el1()));
42 }
43 
44 /******************************************************************************
45  * Helper function to remove current master from coherency
46  *****************************************************************************/
plat_arm_interconnect_exit_coherency(void)47 void plat_arm_interconnect_exit_coherency(void)
48 {
49 	cci_disable_snoop_dvm_reqs(MPIDR_AFFLVL1_VAL(read_mpidr_el1()));
50 }
51