| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 | |
| 15 | struct mpidr_hash { |
| 16 | u64 mask; |
| 17 | u32 shift_aff[4]; |
| 18 | u32 bits; |
| 19 | }; |
| 20 | |
| 21 | extern struct mpidr_hash mpidr_hash; |
| 22 | |
| 23 | static 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 | */ |
| 34 | static 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 */ |