1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2012 Regents of the University of California 4 */ 5 6 #ifndef _ASM_RISCV_SMP_H 7 #define _ASM_RISCV_SMP_H 8 9 #include <linux/cpumask.h> 10 #include <linux/irqreturn.h> 11 #include <linux/thread_info.h> 12 13 #define INVALID_HARTID ULONG_MAX 14 15 struct seq_file; 16 extern unsigned long boot_cpu_hartid; 17 18 #ifdef CONFIG_SMP 19 /* 20 * Mapping between linux logical cpu index and hartid. 21 */ 22 extern unsigned long __cpuid_to_hartid_map[NR_CPUS]; 23 #define cpuid_to_hartid_map(cpu) __cpuid_to_hartid_map[cpu] 24 25 /* print IPI stats */ 26 void show_ipi_stats(struct seq_file *p, int prec); 27 28 /* SMP initialization hook for setup_arch */ 29 void __init setup_smp(void); 30 31 /* Hook for the generic smp_call_function_many() routine. */ 32 void arch_send_call_function_ipi_mask(struct cpumask *mask); 33 34 /* Hook for the generic smp_call_function_single() routine. */ 35 void arch_send_call_function_single_ipi(int cpu); 36 37 int riscv_hartid_to_cpuid(int hartid); 38 void riscv_cpuid_to_hartid_mask(const struct cpumask *in, struct cpumask *out); 39 40 /* 41 * Obtains the hart ID of the currently executing task. This relies on 42 * THREAD_INFO_IN_TASK, but we define that unconditionally. 43 */ 44 #define raw_smp_processor_id() (current_thread_info()->cpu) 45 46 #else 47 48 static inline void show_ipi_stats(struct seq_file *p, int prec) 49 { 50 } 51 52 static inline int riscv_hartid_to_cpuid(int hartid) 53 { 54 if (hartid == boot_cpu_hartid) 55 return 0; 56 57 return -1; 58 } 59 static inline unsigned long cpuid_to_hartid_map(int cpu) 60 { 61 return boot_cpu_hartid; 62 } 63 64 #endif /* CONFIG_SMP */ 65 #endif /* _ASM_RISCV_SMP_H */ 66