123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Author: Huacai Chen <chenhuacai@loongson.cn>
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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*/
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#ifndef __ASM_SMP_H
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#define __ASM_SMP_H
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#ifdef CONFIG_SMP
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#include <linux/atomic.h>
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#include <linux/bitops.h>
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#include <linux/linkage.h>
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#include <linux/threads.h>
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#include <linux/cpumask.h>
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struct smp_ops {
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void (*init_ipi)(void);
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void (*send_ipi_single)(int cpu, unsigned int action);
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void (*send_ipi_mask)(const struct cpumask *mask, unsigned int action);
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};
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extern struct smp_ops mp_ops;
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extern int smp_num_siblings;
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extern int num_processors;
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extern int disabled_cpus;
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extern cpumask_t cpu_sibling_map[];
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extern cpumask_t cpu_core_map[];
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extern cpumask_t cpu_foreign_map[];
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void loongson_smp_setup(void);
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void loongson_prepare_cpus(unsigned int max_cpus);
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void loongson_boot_secondary(int cpu, struct task_struct *idle);
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void loongson_init_secondary(void);
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void loongson_smp_finish(void);
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#ifdef CONFIG_HOTPLUG_CPU
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int loongson_cpu_disable(void);
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void loongson_cpu_die(unsigned int cpu);
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#endif
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static inline void plat_smp_setup(void)
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{
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loongson_smp_setup();
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}
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static inline int raw_smp_processor_id(void)
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{
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#if defined(__VDSO__)
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extern int vdso_smp_processor_id(void)
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__compiletime_error("VDSO should not call smp_processor_id()");
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return vdso_smp_processor_id();
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#else
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return current_thread_info()->cpu;
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#endif
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}
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#define raw_smp_processor_id raw_smp_processor_id
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/* Map from cpu id to sequential logical cpu number. This will only
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* not be idempotent when cpus failed to come on-line. */
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extern int __cpu_number_map[NR_CPUS];
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#define cpu_number_map(cpu) __cpu_number_map[cpu]
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/* The reverse map from sequential logical cpu number to cpu id. */
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extern int __cpu_logical_map[NR_CPUS];
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#define cpu_logical_map(cpu) __cpu_logical_map[cpu]
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#define cpu_physical_id(cpu) cpu_logical_map(cpu)
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#define ACTION_BOOT_CPU 0
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#define ACTION_RESCHEDULE 1
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#define ACTION_CALL_FUNCTION 2
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#define ACTION_IRQ_WORK 3
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#define ACTION_CLEAR_VECTOR 4
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#define SMP_BOOT_CPU BIT(ACTION_BOOT_CPU)
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#define SMP_RESCHEDULE BIT(ACTION_RESCHEDULE)
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#define SMP_CALL_FUNCTION BIT(ACTION_CALL_FUNCTION)
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#define SMP_IRQ_WORK BIT(ACTION_IRQ_WORK)
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#define SMP_CLEAR_VECTOR BIT(ACTION_CLEAR_VECTOR)
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struct secondary_data {
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unsigned long stack;
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unsigned long thread_info;
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};
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extern struct secondary_data cpuboot_data;
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extern asmlinkage void smpboot_entry(void);
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extern asmlinkage void start_secondary(void);
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extern void calculate_cpu_foreign_map(void);
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/*
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* Generate IPI list text
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*/
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extern void show_ipi_list(struct seq_file *p, int prec);
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static inline void arch_send_call_function_single_ipi(int cpu)
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{
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mp_ops.send_ipi_single(cpu, ACTION_CALL_FUNCTION);
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}
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static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
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{
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mp_ops.send_ipi_mask(mask, ACTION_CALL_FUNCTION);
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}
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#ifdef CONFIG_HOTPLUG_CPU
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static inline int __cpu_disable(void)
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{
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return loongson_cpu_disable();
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}
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static inline void __cpu_die(unsigned int cpu)
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{
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loongson_cpu_die(cpu);
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}
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#endif
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#else /* !CONFIG_SMP */
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#define cpu_logical_map(cpu) 0
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#endif /* CONFIG_SMP */
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#endif /* __ASM_SMP_H */
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