The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/include/privatespace.h

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    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  * $FreeBSD$
   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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