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/ccn.h>
11 #include <plat/arm/common/plat_arm.h>
12 
13 static const unsigned char master_to_rn_id_map[] = {
14 	PLAT_ARM_CLUSTER_TO_CCN_ID_MAP
15 };
16 
17 static const ccn_desc_t arm_ccn_desc = {
18 	.periphbase = PLAT_ARM_CCN_BASE,
19 	.num_masters = ARRAY_SIZE(master_to_rn_id_map),
20 	.master_to_rn_id_map = master_to_rn_id_map
21 };
22 
23 CASSERT(PLAT_ARM_CLUSTER_COUNT == ARRAY_SIZE(master_to_rn_id_map),
24 		assert_invalid_cluster_count_for_ccn_variant);
25 
26 /******************************************************************************
27  * The following functions are defined as weak to allow a platform to override
28  * the way ARM CCN driver is initialised and used.
29  *****************************************************************************/
30 #pragma weak plat_arm_interconnect_init
31 #pragma weak plat_arm_interconnect_enter_coherency
32 #pragma weak plat_arm_interconnect_exit_coherency
33 
34 
35 /******************************************************************************
36  * Helper function to initialize ARM CCN driver.
37  *****************************************************************************/
plat_arm_interconnect_init(void)38 void __init plat_arm_interconnect_init(void)
39 {
40 	ccn_init(&arm_ccn_desc);
41 }
42 
43 /******************************************************************************
44  * Helper function to place current master into coherency
45  *****************************************************************************/
plat_arm_interconnect_enter_coherency(void)46 void plat_arm_interconnect_enter_coherency(void)
47 {
48 	ccn_enter_snoop_dvm_domain(1 << MPIDR_AFFLVL1_VAL(read_mpidr_el1()));
49 }
50 
51 /******************************************************************************
52  * Helper function to remove current master from coherency
53  *****************************************************************************/
plat_arm_interconnect_exit_coherency(void)54 void plat_arm_interconnect_exit_coherency(void)
55 {
56 	ccn_exit_snoop_dvm_domain(1 << MPIDR_AFFLVL1_VAL(read_mpidr_el1()));
57 }
58