1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Definitions specific to SMP platforms.
4 *
5 * Copyright (C) 2013 ARM Ltd.
6 */
7
8#ifndef __ASM_SMP_PLAT_H
9#define __ASM_SMP_PLAT_H
10
11#include <linux/cpumask.h>
12
13#include <asm/types.h>
14
15struct mpidr_hash {
16	u64	mask;
17	u32	shift_aff[4];
18	u32	bits;
19};
20
21extern struct mpidr_hash mpidr_hash;
22
23static inline u32 mpidr_hash_size(void)
24{
25	return 1 << mpidr_hash.bits;
26}
27
28/*
29 * Retrieve logical cpu index corresponding to a given MPIDR.Aff*
30 *  - mpidr: MPIDR.Aff* bits to be used for the look-up
31 *
32 * Returns the cpu logical index or -EINVAL on look-up error
33 */
34static inline int get_logical_index(u64 mpidr)
35{
36	int cpu;
37	for (cpu = 0; cpu < nr_cpu_ids; cpu++)
38		if (cpu_logical_map(cpu) == mpidr)
39			return cpu;
40	return -EINVAL;
41}
42
43#endif /* __ASM_SMP_PLAT_H */
44