2 * Copyright (c) Peter Wemm <peter@netplex.com.au> All rights reserved.
3 * Copyright (c) 2003 Matthew Dillon <dillon@backplane.net> All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/sys/i386/include/globaldata.h,v 1.11.2.1 2000/05/16 06:58:10 dillon Exp $
27 * $DragonFly: src/sys/sys/globaldata.h,v 1.6 2003/07/03 17:24:03 dillon Exp $
30 #ifndef _SYS_GLOBALDATA_H_
31 #define _SYS_GLOBALDATA_H_
34 * This structure maps out the global data that needs to be kept on a
35 * per-cpu basis. genassym uses this to generate offsets for the assembler
36 * code. The machine-dependant portions of this file can be found in
37 * <machine/globaldata.h>, but only MD code should retrieve it.
39 * The SMP parts are setup in pmap.c and locore.s for the BSP, and
40 * mp_machdep.c sets up the data for the AP's to "see" when they awake.
41 * The reason for doing it via a struct is so that an array of pointers
42 * to each CPU's data can be set up for things like "check curproc on all
45 * NOTE! this structure needs to remain compatible between module accessors
46 * and the kernel, so we can't throw in lots of #ifdef's.
48 * gd_reqpri serves serveral purposes, bu it is primarily an interrupt
49 * rollup flag used by the task switcher and spl mechanisms to decide that
50 * further checks are necessary. Interrupts are typically managed on a
51 * per-processor basis at least until you leave a critical section, but
52 * may then be scheduled to other cpus.
54 * gd_uprocscheduled indicates that the thread for a user process has been
55 * scheduled. It is used to schedule only one user process at a time in
60 #include <sys/time.h> /* struct timeval */
62 #ifndef _SYS_VMMETER_H_
63 #include <sys/vmmeter.h>
64 #endif _SYS_VMMETER_H_
69 struct privatespace *gd_prvspace; /* self-reference */
70 struct thread *gd_curthread;
71 struct thread *gd_idletd; /* a bit messy but it works */
72 int gd_tdfreecount; /* new thread cache */
73 int gd_reqpri; /* (see note above) */
74 TAILQ_HEAD(,thread) gd_tdallq; /* all threads */
75 TAILQ_HEAD(,thread) gd_tdfreeq; /* new thread cache */
76 TAILQ_HEAD(,thread) gd_tdrunq[32]; /* runnable threads */
77 u_int32_t gd_runqmask; /* which queues? */
79 struct timeval gd_stattv;
80 int gd_intr_nesting_level; /* (for fast interrupts) */
81 int gd_astpending; /* sorta MD but easier here */
82 int gd_uprocscheduled;
83 struct vmmeter gd_cnt;
84 /* extended by <machine/pcpu.h> */
88 struct globaldata *globaldata_find(int cpu);