1 /*
2  * Copyright (c) 2021, ARM Limited and Contributors. All rights reserved.
3  *
4  * SPDX-License-Identifier: BSD-3-Clause
5  */
6 
7 #include <arch.h>
8 #include <arch_helpers.h>
9 #include <lib/psci/psci.h>
10 
11 #include <plat_helpers.h>
12 #include <platform_def.h>
13 
14 const unsigned char mtk_power_domain_tree_desc[] = {
15 	/* Number of root nodes */
16 	PLATFORM_SYSTEM_COUNT,
17 	/* Number of children for the root node */
18 	PLATFORM_MCUSYS_COUNT,
19 	/* Number of children for the mcusys node */
20 	PLATFORM_CLUSTER_COUNT,
21 	/* Number of children for the first cluster node */
22 	PLATFORM_CLUSTER0_CORE_COUNT,
23 };
24 
plat_get_power_domain_tree_desc(void)25 const unsigned char *plat_get_power_domain_tree_desc(void)
26 {
27 	return mtk_power_domain_tree_desc;
28 }
29 
30 /*******************************************************************************
31  * This function implements a part of the critical interface between the psci
32  * generic layer and the platform that allows the former to query the platform
33  * to convert an MPIDR to a unique linear index. An error code (-1) is returned
34  * in case the MPIDR is invalid.
35  ******************************************************************************/
plat_core_pos_by_mpidr(u_register_t mpidr)36 int plat_core_pos_by_mpidr(u_register_t mpidr)
37 {
38 	unsigned int cluster_id, cpu_id;
39 
40 	if ((read_mpidr() & MPIDR_MT_MASK) != 0) {
41 		/* ARMv8.2 arch */
42 		if ((mpidr & (MPIDR_AFFLVL_MASK << MPIDR_AFF0_SHIFT)) != 0) {
43 			return -1;
44 		}
45 		return plat_mediatek_calc_core_pos(mpidr);
46 	}
47 
48 	mpidr &= MPIDR_AFFINITY_MASK;
49 
50 	if ((mpidr & ~(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK)) != 0) {
51 		return -1;
52 	}
53 
54 	cluster_id = (mpidr >> MPIDR_AFF1_SHIFT) & MPIDR_AFFLVL_MASK;
55 	cpu_id = (mpidr >> MPIDR_AFF0_SHIFT) & MPIDR_AFFLVL_MASK;
56 
57 	if (cluster_id >= PLATFORM_CLUSTER_COUNT) {
58 		return -1;
59 	}
60 
61 	/*
62 	 * Validate cpu_id by checking whether it represents a CPU in
63 	 * one of the two clusters present on the platform.
64 	 */
65 	if (cpu_id >= PLATFORM_MAX_CPUS_PER_CLUSTER) {
66 		return -1;
67 	}
68 
69 	return (cpu_id + (cluster_id * 8));
70 }
71