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 1.18 2003/10/17 07:30:40 dillon Exp $
30 #ifndef _SYS_GLOBALDATA_H_
31 #define _SYS_GLOBALDATA_H_
33 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
36 #include <sys/time.h> /* struct timeval */
38 #ifndef _SYS_VMMETER_H_
39 #include <sys/vmmeter.h> /* struct vmmeter */
41 #ifndef _SYS_THREAD_H_
42 #include <sys/thread.h> /* struct thread */
44 #ifndef _SYS_SLABALLOC_H_
45 #include <sys/slaballoc.h> /* SLGlobalData */
49 * This structure maps out the global data that needs to be kept on a
50 * per-cpu basis. genassym uses this to generate offsets for the assembler
51 * code. The machine-dependant portions of this file can be found in
52 * <machine/globaldata.h>, but only MD code should retrieve it.
54 * The SMP parts are setup in pmap.c and locore.s for the BSP, and
55 * mp_machdep.c sets up the data for the AP's to "see" when they awake.
56 * The reason for doing it via a struct is so that an array of pointers
57 * to each CPU's data can be set up for things like "check curproc on all
60 * NOTE! this structure needs to remain compatible between module accessors
61 * and the kernel, so we can't throw in lots of #ifdef's.
63 * gd_reqflags serves serveral purposes, but it is primarily an interrupt
64 * rollup flag used by the task switcher and spl mechanisms to decide that
65 * further checks are necessary. Interrupts are typically managed on a
66 * per-processor basis at least until you leave a critical section, but
67 * may then be scheduled to other cpus.
69 * gd_vme_avail and gd_vme_base cache free vm_map_entry structures for use
70 * in various vm_map related operations. gd_vme_avail is *NOT* a count of
71 * the number of structures in the cache but is instead a count of the number
72 * of unreserved structures in the cache. See vm_map_entry_reserve().
80 struct privatespace *gd_prvspace; /* self-reference */
81 struct thread *gd_curthread;
82 int gd_tdfreecount; /* new thread cache */
83 u_int32_t gd_reqflags; /* (see note above) */
84 union sysunion *gd_freesysun; /* free syscall messages */
85 TAILQ_HEAD(,thread) gd_tdallq; /* all threads */
86 TAILQ_HEAD(,thread) gd_tdfreeq; /* new thread cache */
87 TAILQ_HEAD(,thread) gd_tdrunq[32]; /* runnable threads */
88 u_int32_t gd_runqmask; /* which queues? */
90 u_int gd_other_cpus; /* mask of 'other' cpus */
91 struct timeval gd_stattv;
92 int gd_intr_nesting_level; /* (for interrupts) */
93 int gd_psticks; /* profile kern/kern_clock.c */
94 int gd_psdiv; /* profile kern/kern_clock.c */
95 struct vmmeter gd_cnt;
96 struct lwkt_ipiq *gd_ipiq;
97 short gd_upri; /* userland scheduler helper */
99 struct thread gd_schedthread; /* userland scheduler helper */
100 struct thread gd_idlethread;
101 SLGlobalData gd_slab; /* slab allocator */
102 int gd_vme_kdeficit; /* vm_map_entry reservation */
103 int gd_vme_avail; /* vm_map_entry reservation */
104 struct vm_map_entry *gd_vme_base; /* vm_map_entry reservation */
105 /* extended by <machine/pcpu.h> */
108 typedef struct globaldata *globaldata_t;
111 #define RQB_INTPEND 1
112 #define RQB_AST_OWEUPC 2
113 #define RQB_AST_SIGNAL 3
114 #define RQB_AST_RESCHED 4
116 #define RQF_IPIQ (1 << RQB_IPIQ)
117 #define RQF_INTPEND (1 << RQB_INTPEND)
118 #define RQF_AST_OWEUPC (1 << RQB_AST_OWEUPC)
119 #define RQF_AST_SIGNAL (1 << RQB_AST_SIGNAL)
120 #define RQF_AST_RESCHED (1 << RQB_AST_RESCHED)
121 #define RQF_AST_MASK (RQF_AST_OWEUPC|RQF_AST_SIGNAL|RQF_AST_RESCHED)
126 struct globaldata *globaldata_find(int cpu);