106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
|
/* 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);
|
||
|
|
}
|
||
|
|
|
||
|
|
extern void play_dead(void);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* __ASM_SMP_H */
|