| /* 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 */ |