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/arm/include/param.h

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    1 /*-
    2  * Copyright (c) 2001 David E. O'Brien
    3  * Copyright (c) 1990 The Regents of the University of California.
    4  * All rights reserved.
    5  *
    6  * This code is derived from software contributed to Berkeley by
    7  * William Jolitz.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 3. All advertising materials mentioning features or use of this software
   18  *    must display the following acknowledgement:
   19  *      This product includes software developed by the University of
   20  *      California, Berkeley and its contributors.
   21  * 4. Neither the name of the University nor the names of its contributors
   22  *    may be used to endorse or promote products derived from this software
   23  *    without specific prior written permission.
   24  *
   25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   35  * SUCH DAMAGE.
   36  *
   37  *      from: @(#)param.h       5.8 (Berkeley) 6/28/91
   38  * $FreeBSD: releng/5.1/sys/arm/include/param.h 103436 2002-09-17 01:49:00Z peter $
   39  */
   40 
   41 /*
   42  * Machine dependent constants for StrongARM
   43  */
   44 
   45 /*
   46  * Round p (pointer or byte index) up to a correctly-aligned value
   47  * for all data types (int, long, ...).   The result is unsigned int
   48  * and must be cast to any desired pointer type.
   49  */
   50 #ifndef _ALIGNBYTES
   51 #define _ALIGNBYTES     (sizeof(int) - 1)
   52 #endif
   53 #ifndef _ALIGN
   54 #define _ALIGN(p)       (((unsigned)(p) + _ALIGNBYTES) & ~_ALIGNBYTES)
   55 #endif
   56 
   57 #ifndef _MACHINE
   58 #define _MACHIN         "arm32"
   59 #endif
   60 #ifndef _MACHINE_ARCH
   61 #define _MACHINE_ARCH   "arm32"
   62 #endif
   63 
   64 #ifndef _NO_NAMESPACE_POLLUTION
   65 
   66 #ifndef _MACHINE_PARAM_H_
   67 #define _MACHINE_PARAM_H_
   68 
   69 #ifndef MACHINE
   70 #define MACHINE         "arm32"
   71 #endif
   72 #ifndef MACHINE_ARCH
   73 #define MACHINE_ARCH    "arm32"
   74 #endif
   75 #define MID_MACHINE     MID_ARM32
   76 
   77 #include <machine/cpu.h>
   78 
   79 #ifdef SMP
   80 #define MAXCPU          2
   81 #else
   82 #define MAXCPU          1
   83 #endif /* SMP */
   84 
   85 #define ALIGNBYTES      _ALIGNBYTES
   86 #define ALIGN(p)        _ALIGN(p)
   87 
   88 #define PAGE_SHIFT      12
   89 #define PAGE_SIZE       (1 << PAGE_SHIFT)       /* Page size */
   90 #define PAGE_MASK       (PAGE_SIZE - 1)
   91 #define NPTEPG          (PAGE_SIZE/(sizeof (pt_entry_t)))
   92 
   93 #define KERNBASE        0x100000        /* start of kernel virtual */
   94 #define BTOPKERNBASE    ((u_long)KERNBASE >> PGSHIFT)
   95 
   96 #define UPAGES          2               /* pages of u-area */
   97 #define USPACE          (UPAGES * PAGE_SIZE)    /* total size of u-area */
   98 
   99 /*
  100  * Mach derived conversion macros
  101  */
  102 #define trunc_page(x)           ((x) & ~PAGE_MASK)
  103 #define round_page(x)           (((x) + PAGE_MASK) & ~PAGE_MASK)
  104 #define trunc_4mpage(x)         ((unsigned)(x) & ~PDRMASK)
  105 #define round_4mpage(x)         ((((unsigned)(x)) + PDRMASK) & ~PDRMASK)
  106 
  107 #define atop(x)                 ((unsigned)(x) >> PAGE_SHIFT)
  108 #define ptoa(x)                 ((unsigned)(x) << PAGE_SHIFT)
  109 
  110 #define arm32_btop(x)           ((unsigned)(x) >> PAGE_SHIFT)
  111 #define arm32_ptob(x)           ((unsigned)(x) << PAGE_SHIFT)
  112 
  113 #define pgtok(x)                ((x) * (PAGE_SIZE / 1024))
  114 
  115 #endif /* !_MACHINE_PARAM_H_ */
  116 #endif /* !_NO_NAMESPACE_POLLUTION */

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