8b3e7871bc
declaration in subr_smp.c. This solves a compile problem with gcc 3.0.1 (ia64 cross-build). Reviewed: jhb
70 lines
2.3 KiB
C
70 lines
2.3 KiB
C
/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@FreeBSD.org> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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* ----------------------------------------------------------------------------
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_SMP_H_
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#define _SYS_SMP_H_
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#ifdef _KERNEL
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#include <machine/smp.h>
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#ifndef LOCORE
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#ifdef SMP
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extern void (*cpustop_restartfunc)(void);
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extern int mp_ncpus;
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extern int smp_active;
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extern volatile int smp_started;
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extern int smp_cpus;
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extern u_int all_cpus;
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extern volatile u_int started_cpus;
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extern volatile u_int stopped_cpus;
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/*
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* Macro allowing us to determine whether a CPU is absent at any given
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* time, thus permitting us to configure sparse maps of cpuid-dependent
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* (per-CPU) structures.
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*/
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#define CPU_ABSENT(x_cpu) ((all_cpus & (1 << (x_cpu))) == 0)
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/*
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* Machine dependent functions used to initialize MP support.
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*
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* The cpu_mp_probe() should check to see if MP support is present and return
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* zero if it is not or non-zero if it is. If MP support is present, then
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* cpu_mp_start() will be called so that MP can be enabled. This function
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* should do things such as startup secondary processors. It should also
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* setup mp_ncpus, all_cpus, and smp_cpus. It should also ensure that
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* smp_active and smp_started are initialized at the appropriate time.
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* Once cpu_mp_start() returns, machine independent MP startup code will be
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* executed and a simple message will be output to the console. Finally,
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* cpu_mp_announce() will be called so that machine dependent messages about
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* the MP support may be output to the console if desired.
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*/
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void cpu_mp_announce(void);
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int cpu_mp_probe(void);
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void cpu_mp_start(void);
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void forward_signal(struct thread *);
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void forward_roundrobin(void);
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int restart_cpus(u_int);
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int stop_cpus(u_int);
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void smp_rendezvous_action(void);
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void smp_rendezvous(void (*)(void *),
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void (*)(void *),
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void (*)(void *),
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void *arg);
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#else /* SMP */
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#define CPU_ABSENT(x_cpu) (0)
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#endif /* SMP */
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#endif /* !LOCORE */
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#endif /* _KERNEL */
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#endif /* _SYS_SMP_H_ */
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