1 /*-
2 * Copyright (c) Peter Wemm
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: releng/10.0/sys/i386/include/privatespace.h 158501 2006-05-12 22:38:53Z peter $
27 */
28
29 #ifndef _MACHINE_PRIVATESPACE_H_
30 #define _MACHINE_PRIVATESPACE_H_
31
32 /*
33 * This is the upper (0xff800000) address space layout that is per-cpu.
34 * It is setup in locore.s and pmap.c for the BSP and in mp_machdep.c for
35 * each AP. This is only applicable to the x86 SMP kernel.
36 */
37 struct privatespace {
38 /* page 0 - data page */
39 struct pcpu pcpu;
40 char __filler0[PAGE_SIZE - sizeof(struct pcpu)];
41
42 /* page 1 - idle stack (KSTACK_PAGES pages) */
43 char idlekstack[KSTACK_PAGES * PAGE_SIZE];
44 /* page 1+KSTACK_PAGES... */
45 };
46
47 extern struct privatespace SMP_prvspace[];
48
49 #endif /* ! _MACHINE_PRIVATESPACE_H_ */
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