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/smp.h> 14 #include <asm/types.h> 15 16 struct mpidr_hash { 17 u64 mask; 18 u32 shift_aff[4]; 19 u32 bits; 20 }; 21 22 extern struct mpidr_hash mpidr_hash; 23 24 static inline u32 mpidr_hash_size(void) 25 { 26 return 1 << mpidr_hash.bits; 27 } 28 29 /* 30 * Retrieve logical cpu index corresponding to a given MPIDR.Aff* 31 * - mpidr: MPIDR.Aff* bits to be used for the look-up 32 * 33 * Returns the cpu logical index or -EINVAL on look-up error 34 */ 35 static inline int get_logical_index(u64 mpidr) 36 { 37 int cpu; 38 for (cpu = 0; cpu < nr_cpu_ids; cpu++) 39 if (cpu_logical_map(cpu) == mpidr) 40 return cpu; 41 return -EINVAL; 42 } 43 44 #endif /* __ASM_SMP_PLAT_H */ 45