1 /* 2 * Copyright (C) 2012 Regents of the University of California 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation, version 2. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 */ 13 14 #ifndef _ASM_RISCV_SMP_H 15 #define _ASM_RISCV_SMP_H 16 17 #include <linux/cpumask.h> 18 #include <linux/irqreturn.h> 19 #include <linux/thread_info.h> 20 21 #define INVALID_HARTID ULONG_MAX 22 /* 23 * Mapping between linux logical cpu index and hartid. 24 */ 25 extern unsigned long __cpuid_to_hartid_map[NR_CPUS]; 26 #define cpuid_to_hartid_map(cpu) __cpuid_to_hartid_map[cpu] 27 28 struct seq_file; 29 30 #ifdef CONFIG_SMP 31 32 /* print IPI stats */ 33 void show_ipi_stats(struct seq_file *p, int prec); 34 35 /* SMP initialization hook for setup_arch */ 36 void __init setup_smp(void); 37 38 /* Hook for the generic smp_call_function_many() routine. */ 39 void arch_send_call_function_ipi_mask(struct cpumask *mask); 40 41 /* Hook for the generic smp_call_function_single() routine. */ 42 void arch_send_call_function_single_ipi(int cpu); 43 44 int riscv_hartid_to_cpuid(int hartid); 45 void riscv_cpuid_to_hartid_mask(const struct cpumask *in, struct cpumask *out); 46 47 /* 48 * Obtains the hart ID of the currently executing task. This relies on 49 * THREAD_INFO_IN_TASK, but we define that unconditionally. 50 */ 51 #define raw_smp_processor_id() (current_thread_info()->cpu) 52 53 #else 54 55 static inline void show_ipi_stats(struct seq_file *p, int prec) 56 { 57 } 58 59 static inline int riscv_hartid_to_cpuid(int hartid) 60 { 61 return 0; 62 } 63 64 static inline void riscv_cpuid_to_hartid_mask(const struct cpumask *in, 65 struct cpumask *out) 66 { 67 cpumask_set_cpu(cpuid_to_hartid_map(0), out); 68 } 69 70 #endif /* CONFIG_SMP */ 71 #endif /* _ASM_RISCV_SMP_H */ 72