1 /*
2  * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
3  *
4  * SPDX-License-Identifier: BSD-3-Clause
5  */
6 
7 #include <arch.h>
8 #include <platform_def.h>
9 #include <stdint.h>
10 
11 #include "aml_private.h"
12 
13 /* The power domain tree descriptor */
14 static unsigned char power_domain_tree_desc[] = {
15 	/* Number of root nodes */
16 	PLATFORM_CLUSTER_COUNT,
17 	/* Number of children for the first node */
18 	PLATFORM_CLUSTER0_CORE_COUNT
19 };
20 
21 /*******************************************************************************
22  * This function returns the ARM default topology tree information.
23  ******************************************************************************/
plat_get_power_domain_tree_desc(void)24 const unsigned char *plat_get_power_domain_tree_desc(void)
25 {
26 	return power_domain_tree_desc;
27 }
28 
29 /*******************************************************************************
30  * This function implements a part of the critical interface between the psci
31  * generic layer and the platform that allows the former to query the platform
32  * to convert an MPIDR to a unique linear index. An error code (-1) is returned
33  * in case the MPIDR is invalid.
34  ******************************************************************************/
plat_core_pos_by_mpidr(u_register_t mpidr)35 int plat_core_pos_by_mpidr(u_register_t mpidr)
36 {
37 	unsigned int cluster_id, cpu_id;
38 
39 	mpidr &= MPIDR_AFFINITY_MASK;
40 	if (mpidr & ~(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK))
41 		return -1;
42 
43 	cluster_id = (mpidr >> MPIDR_AFF1_SHIFT) & MPIDR_AFFLVL_MASK;
44 	cpu_id = (mpidr >> MPIDR_AFF0_SHIFT) & MPIDR_AFFLVL_MASK;
45 
46 	if (cluster_id >= PLATFORM_CLUSTER_COUNT)
47 		return -1;
48 
49 	if (cpu_id >= PLATFORM_MAX_CPUS_PER_CLUSTER)
50 		return -1;
51 
52 	return plat_calc_core_pos(mpidr);
53 }
54