121 lines
4.1 KiB
C
121 lines
4.1 KiB
C
/* $NetBSD: savar.h,v 1.4 2003/02/02 02:22:14 christos Exp $ */
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/*-
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* Copyright (c) 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Nathan J. Williams.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Internal data usd by the scheduler activation implementation
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*/
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#ifndef _SYS_SAVAR_H
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#define _SYS_SAVAR_H
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#include <sys/lock.h>
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#include <sys/queue.h>
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struct sadata_upcall {
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SIMPLEQ_ENTRY(sadata_upcall) sau_next;
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int sau_flags;
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int sau_type;
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size_t sau_argsize;
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void *sau_arg;
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stack_t sau_stack;
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union {
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struct {
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ucontext_t e_ctx;
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ucontext_t i_ctx;
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struct sa_t e_sa;
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struct sa_t i_sa;
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} captured;
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struct {
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struct lwp *e_lwp;
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struct lwp *i_lwp;
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} deferred;
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} sau_state;
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};
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#define SAU_FLAG_DEFERRED 0x1
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#define SA_UPCALL_DEFER 0x1000
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struct sadata {
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struct simplelock sa_lock; /* lock on these fields */
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int sa_flag; /* SA_* flags */
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sa_upcall_t sa_upcall; /* upcall entry point */
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struct lwp *sa_vp; /* "virtual processor" allocation */
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struct lwp *sa_woken; /* list of woken lwps */
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struct lwp *sa_idle; /* lwp in sawait */
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int sa_concurrency; /* desired concurrency */
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LIST_HEAD(, lwp) sa_lwpcache; /* list of avaliable lwps */
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int sa_ncached; /* list length */
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stack_t *sa_stacks; /* pointer to array of upcall stacks */
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int sa_nstacks; /* number of valid stacks */
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SIMPLEQ_HEAD(, sadata_upcall) sa_upcalls; /* pending upcalls */
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};
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#define SA_FLAG_ALL SA_FLAG_PREEMPT
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extern struct pool sadata_pool; /* memory pool for sadata structures */
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extern struct pool saupcall_pool; /* memory pool for pending upcalls */
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#ifdef _KERNEL
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#include <sys/mallocvar.h>
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MALLOC_DECLARE(M_SA);
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#endif
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#define SA_NUMSTACKS 16 /* Number of stacks allocated. XXX */
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struct sadata_upcall *sadata_upcall_alloc(int);
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void sadata_upcall_free(struct sadata_upcall *);
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void sa_switch(struct lwp *, int);
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void sa_preempt(struct lwp *);
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void sa_yield(struct lwp *);
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void sa_switchcall(void *);
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void sa_yieldcall(void *);
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int sa_upcall(struct lwp *, int, struct lwp *, struct lwp *, size_t, void *);
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int sa_upcall0(struct lwp *, int, struct lwp *, struct lwp *,
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size_t, void *, struct sadata_upcall *, stack_t *);
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void sa_putcachelwp(struct proc *, struct lwp *);
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struct lwp *sa_getcachelwp(struct proc *);
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void sa_upcall_userret(struct lwp *);
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void cpu_upcall(struct lwp *, int, int, int, void *, void *, void *, sa_upcall_t);
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#endif /* !_SYS_SAVAR_H */
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