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/9.1/sys/arm/include/param.h 224207 2011-07-19 00:37:24Z attilio $
   39  */
   40 
   41 #ifndef _ARM_INCLUDE_PARAM_H_
   42 #define _ARM_INCLUDE_PARAM_H_
   43 
   44 /*
   45  * Machine dependent constants for StrongARM
   46  */
   47 
   48 #include <machine/_align.h>
   49 
   50 #define STACKALIGNBYTES (8 - 1)
   51 #define STACKALIGN(p)   ((u_int)(p) & ~STACKALIGNBYTES)
   52 
   53 #define __PCI_REROUTE_INTERRUPT
   54 
   55 #ifndef MACHINE
   56 #define MACHINE         "arm"
   57 #endif
   58 #ifndef MACHINE_ARCH
   59 #define MACHINE_ARCH    "arm"
   60 #endif
   61 #define MID_MACHINE     MID_ARM6 
   62 
   63 #if defined(SMP) || defined(KLD_MODULE)
   64 #ifndef MAXCPU
   65 #define MAXCPU          2
   66 #endif
   67 #else
   68 #define MAXCPU          1
   69 #endif /* SMP || KLD_MODULE */
   70 
   71 #define ALIGNBYTES      _ALIGNBYTES
   72 #define ALIGN(p)        _ALIGN(p)
   73 /*
   74  * ALIGNED_POINTER is a boolean macro that checks whether an address
   75  * is valid to fetch data elements of type t from on this architecture.
   76  * This does not reflect the optimal alignment, just the possibility
   77  * (within reasonable limits). 
   78  */
   79 #define ALIGNED_POINTER(p, t)   ((((unsigned)(p)) & (sizeof(t)-1)) == 0)
   80 
   81 /*
   82  * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
   83  * architecture.  It should be used with appropriate caution.
   84  */
   85 #define CACHE_LINE_SHIFT        6
   86 #define CACHE_LINE_SIZE         (1 << CACHE_LINE_SHIFT)
   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 PDR_SHIFT       20 /* log2(NBPDR) */
   94 #define NBPDR           (1 << PDR_SHIFT)
   95 #define NPDEPG          (1 << (32 - PDR_SHIFT))
   96 
   97 #define MAXPAGESIZES    1               /* maximum number of supported page sizes */
   98 
   99 #ifndef KSTACK_PAGES
  100 #define KSTACK_PAGES    2
  101 #endif /* !KSTACK_PAGES */
  102 
  103 #ifndef FPCONTEXTSIZE
  104 #define FPCONTEXTSIZE   (0x100)
  105 #endif
  106 
  107 #ifndef KSTACK_GUARD_PAGES
  108 #define KSTACK_GUARD_PAGES      1
  109 #endif /* !KSTACK_GUARD_PAGES */
  110 
  111 #define USPACE_SVC_STACK_TOP            KSTACK_PAGES * PAGE_SIZE
  112 #define USPACE_SVC_STACK_BOTTOM         (USPACE_SVC_STACK_TOP - 0x1000)
  113 #define USPACE_UNDEF_STACK_TOP          (USPACE_SVC_STACK_BOTTOM - 0x10)
  114 #define USPACE_UNDEF_STACK_BOTTOM       (FPCONTEXTSIZE + 10)
  115 /*
  116  * Mach derived conversion macros
  117  */
  118 #define trunc_page(x)           ((x) & ~PAGE_MASK)
  119 #define round_page(x)           (((x) + PAGE_MASK) & ~PAGE_MASK)
  120 #define trunc_4mpage(x)         ((unsigned)(x) & ~PDRMASK)
  121 #define round_4mpage(x)         ((((unsigned)(x)) + PDRMASK) & ~PDRMASK)
  122 
  123 #define atop(x)                 ((unsigned)(x) >> PAGE_SHIFT)
  124 #define ptoa(x)                 ((unsigned)(x) << PAGE_SHIFT)
  125 
  126 #define arm32_btop(x)           ((unsigned)(x) >> PAGE_SHIFT)
  127 #define arm32_ptob(x)           ((unsigned)(x) << PAGE_SHIFT)
  128 
  129 #define pgtok(x)                ((x) * (PAGE_SIZE / 1024))
  130 
  131 #endif /* !_ARM_INCLUDE_PARAM_H_ */

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