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43 lines
803 B
43 lines
803 B
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Definitions specific to SMP platforms. |
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* |
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* Copyright (C) 2013 ARM Ltd. |
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*/ |
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#ifndef __ASM_SMP_PLAT_H |
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#define __ASM_SMP_PLAT_H |
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#include <linux/cpumask.h> |
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#include <asm/types.h> |
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struct mpidr_hash { |
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u64 mask; |
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u32 shift_aff[4]; |
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u32 bits; |
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}; |
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extern struct mpidr_hash mpidr_hash; |
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static inline u32 mpidr_hash_size(void) |
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{ |
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return 1 << mpidr_hash.bits; |
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} |
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/* |
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* Retrieve logical cpu index corresponding to a given MPIDR.Aff* |
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* - mpidr: MPIDR.Aff* bits to be used for the look-up |
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* |
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* Returns the cpu logical index or -EINVAL on look-up error |
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*/ |
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static inline int get_logical_index(u64 mpidr) |
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{ |
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int cpu; |
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for (cpu = 0; cpu < nr_cpu_ids; cpu++) |
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if (cpu_logical_map(cpu) == mpidr) |
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return cpu; |
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return -EINVAL; |
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} |
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#endif /* __ASM_SMP_PLAT_H */
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