b40ce4165d
Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
74 lines
2.9 KiB
C
74 lines
2.9 KiB
C
/*-
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* Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
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* Copyright (c) Peter Wemm <peter@netplex.com.au>
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_GLOBALDATA_H_
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#define _MACHINE_GLOBALDATA_H_
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#ifdef _KERNEL
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#include <sys/queue.h>
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/*
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* This structure maps out the global data that needs to be kept on a
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* per-cpu basis. genassym uses this to generate offsets for the assembler
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* code, which also provides external symbols so that C can get at them as
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* though they were really globals. This structure is pointed to by
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* the per-cpu system value (see alpha_pal_rdval() and alpha_pal_wrval()).
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* Inside the kernel, the globally reserved register t7 is used to
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* point at the globaldata structure.
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*/
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struct globaldata {
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struct thread *gd_curthread; /* current thread */
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struct thread *gd_idlethread; /* idle thread */
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struct thread *gd_fpcurthread; /* fp state owner */
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struct pcb *gd_curpcb; /* current pcb */
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struct timeval gd_switchtime;
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int gd_switchticks;
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u_int gd_cpuid; /* this cpu number */
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u_int gd_other_cpus; /* all other cpus */
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u_int64_t gd_pending_ipis; /* pending IPI events */
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struct pmap *gd_current_pmap; /* which pmap is active */
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u_int32_t gd_next_asn; /* next ASN to allocate */
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u_int32_t gd_current_asngen; /* ASN rollover check */
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SLIST_ENTRY(globaldata) gd_allcpu;
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struct lock_list_entry *gd_spinlocks;
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#ifdef KTR_PERCPU
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volatile int gd_ktr_idx; /* Index into trace table */
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char *gd_ktr_buf;
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char gd_ktr_buf_data[0];
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#endif
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};
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void globaldata_init(struct globaldata *pcpu, int cpuid, size_t sz);
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#endif /* _KERNEL */
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#endif /* !_MACHINE_GLOBALDATA_H_ */
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