summaryrefslogtreecommitdiffstats
path: root/plat/mediatek/mt8183/plat_topology.c
blob: 7b1dd036e939aa4faae6c39fa5e3a44f284cc476 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
/*
 * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <arch.h>
#include <platform_def.h>
#include <lib/psci/psci.h>

const unsigned char mtk_power_domain_tree_desc[] = {
	/* Number of root nodes */
	PLATFORM_SYSTEM_COUNT,
	/* Number of children for the root node */
	PLATFORM_CLUSTER_COUNT,
	/* Number of children for the first cluster node */
	PLATFORM_CLUSTER0_CORE_COUNT,
	/* Number of children for the second cluster node */
	PLATFORM_CLUSTER1_CORE_COUNT
};

/*******************************************************************************
 * This function returns the MT8173 default topology tree information.
 ******************************************************************************/
const unsigned char *plat_get_power_domain_tree_desc(void)
{
	return mtk_power_domain_tree_desc;
}

/*******************************************************************************
 * This function implements a part of the critical interface between the psci
 * generic layer and the platform that allows the former to query the platform
 * to convert an MPIDR to a unique linear index. An error code (-1) is returned
 * in case the MPIDR is invalid.
 ******************************************************************************/
int plat_core_pos_by_mpidr(u_register_t mpidr)
{
	unsigned int cluster_id, cpu_id;

	mpidr &= MPIDR_AFFINITY_MASK;

	if (mpidr & ~(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK))
		return -1;

	cluster_id = (mpidr >> MPIDR_AFF1_SHIFT) & MPIDR_AFFLVL_MASK;
	cpu_id = (mpidr >> MPIDR_AFF0_SHIFT) & MPIDR_AFFLVL_MASK;

	if (cluster_id >= PLATFORM_CLUSTER_COUNT)
		return -1;

	/*
	 * Validate cpu_id by checking whether it represents a CPU in
	 * one of the two clusters present on the platform.
	 */
	if (cpu_id >= PLATFORM_MAX_CPUS_PER_CLUSTER)
		return -1;

	return (cpu_id + (cluster_id * 4));
}