mirror of https://gitee.com/openkylin/linux.git
61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
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/*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file "COPYING" in the main directory of this
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* archive for more details.
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*
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* Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
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* Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
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* Copyright (C) 2000, 2001, 2002 Ralf Baechle
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* Copyright (C) 2000, 2001 Broadcom Corporation
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*/
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#ifndef __ASM_SMP_H
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#define __ASM_SMP_H
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#include <linux/bitops.h>
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#include <linux/linkage.h>
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#include <linux/threads.h>
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#include <linux/cpumask.h>
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#include <asm/atomic.h>
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#include <asm/smp-ops.h>
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extern int smp_num_siblings;
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extern cpumask_t cpu_sibling_map[];
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#define raw_smp_processor_id() (current_thread_info()->cpu)
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/* Map from cpu id to sequential logical cpu number. This will only
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not be idempotent when cpus failed to come on-line. */
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extern int __cpu_number_map[NR_CPUS];
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#define cpu_number_map(cpu) __cpu_number_map[cpu]
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/* The reverse map from sequential logical cpu number to cpu id. */
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extern int __cpu_logical_map[NR_CPUS];
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#define cpu_logical_map(cpu) __cpu_logical_map[cpu]
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#define NO_PROC_ID (-1)
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#define SMP_RESCHEDULE_YOURSELF 0x1 /* XXX braindead */
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#define SMP_CALL_FUNCTION 0x2
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extern void asmlinkage smp_bootstrap(void);
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/*
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* this function sends a 'reschedule' IPI to another CPU.
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* it goes straight through and wastes no time serializing
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* anything. Worst case is that we lose a reschedule ...
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*/
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static inline void smp_send_reschedule(int cpu)
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{
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extern struct plat_smp_ops *mp_ops; /* private */
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mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF);
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}
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extern asmlinkage void smp_call_function_interrupt(void);
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extern void arch_send_call_function_single_ipi(int cpu);
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extern void arch_send_call_function_ipi(cpumask_t mask);
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#endif /* __ASM_SMP_H */
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