1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Definitions specific to SMP platforms. 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (C) 2013 ARM Ltd. 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun #ifndef __ASM_SMP_PLAT_H 9*4882a593Smuzhiyun #define __ASM_SMP_PLAT_H 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #include <linux/cpumask.h> 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun #include <asm/types.h> 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun struct mpidr_hash { 16*4882a593Smuzhiyun u64 mask; 17*4882a593Smuzhiyun u32 shift_aff[4]; 18*4882a593Smuzhiyun u32 bits; 19*4882a593Smuzhiyun }; 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun extern struct mpidr_hash mpidr_hash; 22*4882a593Smuzhiyun mpidr_hash_size(void)23*4882a593Smuzhiyunstatic inline u32 mpidr_hash_size(void) 24*4882a593Smuzhiyun { 25*4882a593Smuzhiyun return 1 << mpidr_hash.bits; 26*4882a593Smuzhiyun } 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun /* 29*4882a593Smuzhiyun * Retrieve logical cpu index corresponding to a given MPIDR.Aff* 30*4882a593Smuzhiyun * - mpidr: MPIDR.Aff* bits to be used for the look-up 31*4882a593Smuzhiyun * 32*4882a593Smuzhiyun * Returns the cpu logical index or -EINVAL on look-up error 33*4882a593Smuzhiyun */ get_logical_index(u64 mpidr)34*4882a593Smuzhiyunstatic inline int get_logical_index(u64 mpidr) 35*4882a593Smuzhiyun { 36*4882a593Smuzhiyun int cpu; 37*4882a593Smuzhiyun for (cpu = 0; cpu < nr_cpu_ids; cpu++) 38*4882a593Smuzhiyun if (cpu_logical_map(cpu) == mpidr) 39*4882a593Smuzhiyun return cpu; 40*4882a593Smuzhiyun return -EINVAL; 41*4882a593Smuzhiyun } 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun #endif /* __ASM_SMP_PLAT_H */ 44