2 * Copyright (c) Peter Wemm <peter@netplex.com.au>
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 * Only machine-dependant code should ever include this file. MI
27 * code and header files do NOT include this file. e.g. sys/globaldata.h
28 * should not include this file.
30 * $FreeBSD: src/sys/i386/include/globaldata.h,v 1.11.2.1 2000/05/16 06:58:10 dillon Exp $
31 * $DragonFly: src/sys/i386/include/Attic/globaldata.h,v 1.16 2003/07/08 06:27:26 dillon Exp $
34 #ifndef _MACHINE_GLOBALDATA_H_
35 #define _MACHINE_GLOBALDATA_H_
37 #ifndef _SYS_GLOBALDATA_H_
38 #include <sys/globaldata.h> /* struct globaldata */
40 #ifndef _SYS_THREAD_H_
41 #include <sys/thread.h> /* struct thread */
43 #ifndef _MACHINE_SEGMENTS_H_
44 #include <machine/segments.h> /* struct segment_descriptor */
46 #ifndef _MACHINE_TSS_H_
47 #include <machine/tss.h> /* struct i386tss */
51 * Note on interrupt control. Pending interrupts not yet dispatched are
52 * marked in gd_fpending or gd_ipending. Once dispatched the interrupt's
53 * pending bit is cleared and the interrupt is masked. Upon completion
54 * the interrupt is unmasked.
56 * For edge triggered interrupts interrupts may be enabled again at this
57 * point and if they occur before the interrupt service routine is complete
58 * the service routine will loop.
60 * The current thread's cpl is stored in the thread structure.
64 struct thread gd_idlethread;
65 struct segment_descriptor gd_common_tssd;
66 struct segment_descriptor *gd_tss_gdt;
67 struct thread *gd_npxthread;
68 struct i386tss gd_common_tss;
69 int gd_fpending; /* fast interrupt pending */
70 int gd_ipending; /* normal interrupt pending */
71 int gd_currentldt; /* USER_LDT */
86 * This is the upper (0xff800000) address space layout that is per-cpu.
87 * It is setup in locore.s and pmap.c for the BSP and in mp_machdep.c for
88 * each AP. genassym helps export this to the assembler code.
90 * WARNING! page-bounded fields are hardwired for SMPpt[] setup in
91 * i386/i386/mp_machdep.c and locore.s.
94 /* page 0 - data page */
95 struct mdglobaldata mdglobaldata;
96 char __filler0[PAGE_SIZE - sizeof(struct mdglobaldata)];
98 /* page 1..4 - CPAGE1,CPAGE2,CPAGE3,PPAGE1 */
99 char CPAGE1[PAGE_SIZE]; /* SMPpt[1] */
100 char CPAGE2[PAGE_SIZE]; /* SMPpt[2] */
101 char CPAGE3[PAGE_SIZE]; /* SMPpt[3] */
102 char PPAGE1[PAGE_SIZE]; /* SMPpt[4] */
104 /* page 5..4+UPAGES - idle stack (UPAGES pages) */
105 char idlestack[UPAGES * PAGE_SIZE]; /* SMPpt[5..] */
108 extern struct privatespace CPU_prvspace[];
110 #define mdcpu ((struct mdglobaldata *)_get_mycpu())
111 #define npxthread mdcpu->gd_npxthread