/* SPDX-License-Identifier: GPL-2.0 */ /* * Author: Huacai Chen <chenhuacai@loongson.cn> * Copyright (C) 2020-2022 Loongson Technology Corporation Limited */ #ifndef __ASM_SMP_H #define __ASM_SMP_H #include <linux/atomic.h> #include <linux/bitops.h> #include <linux/linkage.h> #include <linux/threads.h> #include <linux/cpumask.h> extern int smp_num_siblings; extern int num_processors; extern int disabled_cpus; extern cpumask_t cpu_sibling_map[]; extern cpumask_t cpu_core_map[]; extern cpumask_t cpu_foreign_map[]; void loongson_smp_setup(void); void loongson_prepare_cpus(unsigned int max_cpus); void loongson_boot_secondary(int cpu, struct task_struct *idle); void loongson_init_secondary(void); void loongson_smp_finish(void); void loongson_send_ipi_single(int cpu, unsigned int action); void loongson_send_ipi_mask(const struct cpumask *mask, unsigned int action); #ifdef CONFIG_HOTPLUG_CPU int loongson_cpu_disable(void); void loongson_cpu_die(unsigned int cpu); #endif static inline void plat_smp_setup(void) { loongson_smp_setup(); } static inline int raw_smp_processor_id(void) { #if defined(__VDSO__) extern int vdso_smp_processor_id(void) __compiletime_error("VDSO should not call smp_processor_id()"); return vdso_smp_processor_id(); #else return current_thread_info()->cpu; #endif } #define raw_smp_processor_id raw_smp_processor_id /* Map from cpu id to sequential logical cpu number. This will only * not be idempotent when cpus failed to come on-line. */ extern int __cpu_number_map[NR_CPUS]; #define cpu_number_map(cpu) __cpu_number_map[cpu] /* The reverse map from sequential logical cpu number to cpu id. */ extern int __cpu_logical_map[NR_CPUS]; #define cpu_logical_map(cpu) __cpu_logical_map[cpu] #define cpu_physical_id(cpu) cpu_logical_map(cpu) #define SMP_BOOT_CPU 0x1 #define SMP_RESCHEDULE 0x2 #define SMP_CALL_FUNCTION 0x4 struct secondary_data { unsigned long stack; unsigned long thread_info; }; extern struct secondary_data cpuboot_data; extern asmlinkage void smpboot_entry(void); extern void calculate_cpu_foreign_map(void); /* * Generate IPI list text */ extern void show_ipi_list(struct seq_file *p, int prec); static inline void arch_send_call_function_single_ipi(int cpu) { loongson_send_ipi_single(cpu, SMP_CALL_FUNCTION); } static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) { loongson_send_ipi_mask(mask, SMP_CALL_FUNCTION); } #ifdef CONFIG_HOTPLUG_CPU static inline int __cpu_disable(void) { return loongson_cpu_disable(); } static inline void __cpu_die(unsigned int cpu) { loongson_cpu_die(cpu); } #endif #endif /* __ASM_SMP_H */