1 /*
2  * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
3  *
4  * SPDX-License-Identifier: BSD-3-Clause
5  */
6 
7 #include <arch.h>
8 
9 #include <lib/cassert.h>
10 
11 #include "plat_ls.h"
12 #include "platform_def.h"
13 
14 unsigned char ls1043_power_domain_tree_desc[LS1043_CLUSTER_COUNT + 1];
15 
16 
17 CASSERT(LS1043_CLUSTER_COUNT && LS1043_CLUSTER_COUNT <= 256,
18 		assert_invalid_ls1043_cluster_count);
19 
20 /*******************************************************************************
21  * This function dynamically constructs the topology according to
22  * LS1043_CLUSTER_COUNT and returns it.
23  ******************************************************************************/
plat_get_power_domain_tree_desc(void)24 const unsigned char *plat_get_power_domain_tree_desc(void)
25 {
26 	int i;
27 
28 	ls1043_power_domain_tree_desc[0] = LS1043_CLUSTER_COUNT;
29 
30 	for (i = 0; i < LS1043_CLUSTER_COUNT; i++)
31 		ls1043_power_domain_tree_desc[i + 1] =
32 						LS1043_MAX_CPUS_PER_CLUSTER;
33 
34 	return ls1043_power_domain_tree_desc;
35 }
36 
37 /*******************************************************************************
38  * This function returns the core count within the cluster corresponding to
39  * `mpidr`.
40  ******************************************************************************/
plat_ls_get_cluster_core_count(u_register_t mpidr)41 unsigned int plat_ls_get_cluster_core_count(u_register_t mpidr)
42 {
43 	return LS1043_MAX_CPUS_PER_CLUSTER;
44 }
45 
46 /*******************************************************************************
47  * This function implements a part of the critical interface between the psci
48  * generic layer and the platform that allows the former to query the platform
49  * to convert an MPIDR to a unique linear index. An error code (-1) is returned
50  * in case the MPIDR is invalid.
51  ******************************************************************************/
plat_core_pos_by_mpidr(u_register_t mpidr)52 int plat_core_pos_by_mpidr(u_register_t mpidr)
53 {
54 	if (ls_check_mpidr(mpidr) == -1)
55 		return -1;
56 
57 	return plat_ls_calc_core_pos(mpidr);
58 }
59