/*
* arch/arm/include/asm/smp.h
*
* Copyright (C) 2004-2005 ARM Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_ARM_SMP_H
#define __ASM_ARM_SMP_H

#include <linux/threads.h>
#include <linux/cpumask.h>
#include <linux/thread_info.h>

#ifndef CONFIG_SMP
# error "<asm/smp.h> included in non-SMP build"
#endif

#define raw_smp_processor_id() (current_thread_info()->cpu)

struct seq_file;

/*
* generate IPI list text
*/
extern void show_ipi_list(struct seq_file *, int);

/*
* Called from assembly code, this handles an IPI.
*/
asmlinkage void do_IPI(int ipinr, struct pt_regs *regs);

/*
* Called from C code, this handles an IPI.
*/
void handle_IPI(int ipinr, struct pt_regs *regs);

/*
* Setup the set of possible CPUs (via set_cpu_possible)
*/
extern void smp_init_cpus(void);


/*
* Provide a function to raise an IPI cross call on CPUs in callmap.
*/
extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int));

/*
* Boot a secondary CPU, and assign it the specified idle task.
* This also gives us the initial stack to use for this CPU.
*/
extern int boot_secondary(unsigned int cpu, struct task_struct *);

/*
* Called from platform specific assembly code, this is the
* secondary CPU entry point.
*/
asmlinkage void secondary_start_kernel(void);


/*
* Initial data for bringing up a secondary CPU.
*/
struct secondary_data {
union {
unsigned long mpu_rgn_szr;
unsigned long pgdir;
};
unsigned long swapper_pg_dir;
void *stack;
};
extern struct secondary_data secondary_data;
extern volatile int pen_release;

extern int __cpu_disable(void);

extern void __cpu_die(unsigned int cpu);
extern void cpu_die(void);

extern void arch_send_call_function_single_ipi(int cpu);
extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask);

extern int register_ipi_completion(struct completion *completion, int cpu);

struct smp_operations {
#ifdef CONFIG_SMP
/*
* Setup the set of possible CPUs (via set_cpu_possible)
*/
void (*smp_init_cpus)(void);
/*
* Initialize cpu_possible map, and enable coherency
*/
void (*smp_prepare_cpus)(unsigned int max_cpus);

/*
* Perform platform specific initialisation of the specified CPU.
*/
void (*smp_secondary_init)(unsigned int cpu);
/*
* Boot a secondary CPU, and assign it the specified idle task.
* This also gives us the initial stack to use for this CPU.
*/
int (*smp_boot_secondary)(unsigned int cpu, struct task_struct *idle);
#ifdef CONFIG_HOTPLUG_CPU
int (*cpu_kill)(unsigned int cpu);
void (*cpu_die)(unsigned int cpu);
int (*cpu_disable)(unsigned int cpu);
#endif
#endif
};

/*
* set platform specific SMP operations
*/
extern void smp_set_ops(struct smp_operations *);

#endif /* ifndef __ASM_ARM_SMP_H */