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/*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file "COPYING" in the main directory of this
* archive for more details.
*
* Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
* Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
* Copyright (C) 2000, 2001, 2002 Ralf Baechle
* Copyright (C) 2000, 2001 Broadcom Corporation
*/
#ifndef __ASM_SMP_H
#define __ASM_SMP_H
#include <linux/bitops.h>
#include <linux/linkage.h>
#include <linux/smp.h>
#include <linux/threads.h>
#include <linux/cpumask.h>
#include <linux/atomic.h>
#include <asm/smp-ops.h>
extern int smp_num_siblings;
extern cpumask_t cpu_sibling_map[];
#define raw_smp_processor_id() (current_thread_info()->cpu)
/* 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 NO_PROC_ID (-1)
#define SMP_RESCHEDULE_YOURSELF 0x1 /* XXX braindead */
#define SMP_CALL_FUNCTION 0x2
/* Octeon - Tell another core to flush its icache */
#define SMP_ICACHE_FLUSH 0x4
/* Used by kexec crashdump to save all cpu's state */
#define SMP_DUMP 0x8
extern volatile cpumask_t cpu_callin_map;
extern void asmlinkage smp_bootstrap(void);
/*
* this function sends a 'reschedule' IPI to another CPU.
* it goes straight through and wastes no time serializing
* anything. Worst case is that we lose a reschedule ...
*/
static inline void smp_send_reschedule(int cpu)
{
extern struct plat_smp_ops *mp_ops; /* private */
mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF);
}
#ifdef CONFIG_HOTPLUG_CPU
static inline int __cpu_disable(void)
{
extern struct plat_smp_ops *mp_ops; /* private */
return mp_ops->cpu_disable();
}
static inline void __cpu_die(unsigned int cpu)
{
extern struct plat_smp_ops *mp_ops; /* private */
mp_ops->cpu_die(cpu);
}
extern void play_dead(void);
#endif
extern asmlinkage void smp_call_function_interrupt(void);
static inline void arch_send_call_function_single_ipi(int cpu)
{
extern struct plat_smp_ops *mp_ops; /* private */
mp_ops->send_ipi_mask(&cpumask_of_cpu(cpu), SMP_CALL_FUNCTION);
}
static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
{
extern struct plat_smp_ops *mp_ops; /* private */
mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
}
#if defined(CONFIG_KEXEC)
extern void (*dump_ipi_function_ptr)(void *);
void dump_send_ipi(void (*dump_ipi_callback)(void *));
#endif
#endif /* __ASM_SMP_H */