/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_SMP_H
#define __LINUX_SMP_H



#include <linux/errno.h>
#include <linux/types.h>
#include <linux/list.h>
#include <linux/cpumask.h>
#include <linux/init.h>
#include <linux/smp_types.h>

typedef void (*smp_call_func_t)(void *info);
typedef bool (*smp_cond_func_t)(int cpu, void *info);


struct __call_single_data {
	struct __call_single_node node;
	smp_call_func_t func;
	void *info;
};

#define CSD_INIT(_func, _info) \
	(struct __call_single_data){ .func = (_func), .info = (_info), }


typedef struct __call_single_data call_single_data_t
	__aligned(sizeof(struct __call_single_data));

#define INIT_CSD(_csd, _func, _info)		\
do {						\
	*(_csd) = CSD_INIT((_func), (_info));	\
} while (0)


extern void __smp_call_single_queue(int cpu, struct llist_node *node);


extern unsigned int total_cpus;

int smp_call_function_single(int cpuid, smp_call_func_t func, void *info,
			     int wait);

void on_each_cpu_cond_mask(smp_cond_func_t cond_func, smp_call_func_t func,
			   void *info, bool wait, const struct cpumask *mask);

int smp_call_function_single_async(int cpu, struct __call_single_data *csd);


void panic_smp_self_stop(void);
void nmi_panic_self_stop(struct pt_regs *regs);
void crash_smp_send_stop(void);


static inline void on_each_cpu(smp_call_func_t func, void *info, int wait)
{
	on_each_cpu_cond_mask(NULL, func, info, wait, cpu_online_mask);
}


static inline void on_each_cpu_mask(const struct cpumask *mask,
				    smp_call_func_t func, void *info, bool wait)
{
	on_each_cpu_cond_mask(NULL, func, info, wait, mask);
}


static inline void on_each_cpu_cond(smp_cond_func_t cond_func,
				    smp_call_func_t func, void *info, bool wait)
{
	on_each_cpu_cond_mask(cond_func, func, info, wait, cpu_online_mask);
}

#ifdef CONFIG_SMP

#include <linux/preempt.h>
#include <linux/compiler.h>
#include <linux/thread_info.h>
#include <asm/smp.h>




extern void smp_send_stop(void);


extern void smp_send_reschedule(int cpu);



extern void smp_prepare_cpus(unsigned int max_cpus);


extern int __cpu_up(unsigned int cpunum, struct task_struct *tidle);


extern void smp_cpus_done(unsigned int max_cpus);


void smp_call_function(smp_call_func_t func, void *info, int wait);
void smp_call_function_many(const struct cpumask *mask,
			    smp_call_func_t func, void *info, bool wait);

int smp_call_function_any(const struct cpumask *mask,
			  smp_call_func_t func, void *info, int wait);

void kick_all_cpus_sync(void);
void wake_up_all_idle_cpus(void);


void __init call_function_init(void);
void generic_smp_call_function_single_interrupt(void);
#define generic_smp_call_function_interrupt \
	generic_smp_call_function_single_interrupt


void smp_prepare_boot_cpu(void);

extern unsigned int setup_max_cpus;
extern void __init setup_nr_cpu_ids(void);
extern void __init smp_init(void);

extern int __boot_cpu_id;

static inline int get_boot_cpu_id(void)
{
	return __boot_cpu_id;
}

#else 

static inline void smp_send_stop(void) { }


#define raw_smp_processor_id()			0
static inline void up_smp_call_function(smp_call_func_t func, void *info)
{
}
#define smp_call_function(func, info, wait) \
			(up_smp_call_function(func, info))

static inline void smp_send_reschedule(int cpu) { }
#define smp_prepare_boot_cpu()			do {} while (0)
#define smp_call_function_many(mask, func, info, wait) \
			(up_smp_call_function(func, info))
static inline void call_function_init(void) { }

static inline int
smp_call_function_any(const struct cpumask *mask, smp_call_func_t func,
		      void *info, int wait)
{
	return smp_call_function_single(0, func, info, wait);
}

static inline void kick_all_cpus_sync(void) {  }
static inline void wake_up_all_idle_cpus(void) {  }

#define setup_max_cpus 0

#ifdef CONFIG_UP_LATE_INIT
extern void __init up_late_init(void);
static inline void smp_init(void) { up_late_init(); }
#else
static inline void smp_init(void) { }
#endif

static inline int get_boot_cpu_id(void)
{
	return 0;
}

#endif 






#ifndef __smp_processor_id
#define __smp_processor_id(x) raw_smp_processor_id(x)
#endif

#ifdef CONFIG_DEBUG_PREEMPT
  extern unsigned int debug_smp_processor_id(void);
# define smp_processor_id() debug_smp_processor_id()
#else
# define smp_processor_id() __smp_processor_id()
#endif

#define get_cpu()		({ preempt_disable(); __smp_processor_id(); })
#define put_cpu()		preempt_enable()


extern void arch_disable_smp_support(void);

extern void arch_thaw_secondary_cpus_begin(void);
extern void arch_thaw_secondary_cpus_end(void);

void smp_setup_processor_id(void);

int smp_call_on_cpu(unsigned int cpu, int (*func)(void *), void *par,
		    bool phys);


int smpcfd_prepare_cpu(unsigned int cpu);
int smpcfd_dead_cpu(unsigned int cpu);
int smpcfd_dying_cpu(unsigned int cpu);

#endif 
