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 */ 44