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#ifndef __SMP_H__
#define __SMP_H__
#ifdef CONFIG_SMP
#ifndef __ASSEMBLY__
#include "kernel/kernel.h"
#include "arch_smp.h"
#include "spinlock.h"
/* number of CPUs (execution strands in the system */
EXTERN unsigned ncpus;
/* Number of virtual strands per physical core */
EXTERN unsigned ht_per_core;
/* which cpu is bootstrapping */
EXTERN unsigned bsp_cpu_id;
#define cpu_is_bsp(cpu) (bsp_cpu_id == cpu)
/*
* SMP initialization is largely architecture dependent and each architecture
* must provide a method how to do it. If initiating SMP fails the function does
* not report it. However it must put the system in such a state that it falls
* back to a uniprocessor system. Although the uniprocessor configuration may be
* suboptimal, the system must be able to run on the bootstrap processor as if
* it was the only processor in the system
*/
void smp_init(void);
#define CPU_IS_BSP 1
#define CPU_IS_READY 2
struct cpu {
u32_t flags;
};
EXTERN struct cpu cpus[CONFIG_MAX_CPUS];
#define cpu_set_flag(cpu, flag) do { cpus[cpu].flags |= (flag); } while(0)
#define cpu_clear_flag(cpu, flag) do { cpus[cpu].flags &= ~(flag); } while(0)
#define cpu_test_flag(cpu, flag) (cpus[cpu].flags & (flag))
#define cpu_is_ready(cpu) cpu_test_flag(cpu, CPU_IS_READY)
/*
* Big Kernel Lock prevents more then one cpu executing the kernel code
*/
SPINLOCK_DECLARE(big_kernel_lock)
/*
* to sync the booting APs
*/
SPINLOCK_DECLARE(boot_lock)
void wait_for_APs_to_finish_booting(void);
void ap_boot_finished(unsigned cpu);
void smp_shutdown_aps(void );
/* IPI handlers */
void smp_ipi_halt_handler(void);
void smp_ipi_sched_handler(void);
void smp_schedule(unsigned cpu);
/* stop a processes on a different cpu */
void smp_schedule_stop_proc(struct proc * p);
/* stop a process on a different cpu because its address space is being changed */
void smp_schedule_vminhibit(struct proc * p);
/* stop the process and for saving its full context */
void smp_schedule_stop_proc_save_ctx(struct proc * p);
/* migrate the full context of a process to the destination CPU */
void smp_schedule_migrate_proc(struct proc * p, unsigned dest_cpu);
void arch_send_smp_schedule_ipi(unsigned cpu);
void arch_smp_halt_cpu(void);
/* deal with x-cpu scheduling event */
void smp_sched_handler(void);
#endif /* __ASSEMBLY__ */
#endif /* CONFIG_SMP */
#endif /* __SMP_H__ */
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