sys/arch/i386/include/param.h

   1 /*      $NetBSD: param.h,v 1.77 2012/04/20 22:23:24 rmind Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1990 The Regents of the University of California.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * William Jolitz.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)param.h     5.8 (Berkeley) 6/28/91
  35  */
  36
  37 #ifndef _I386_PARAM_H_
  38 #define _I386_PARAM_H_
  39
  40 /*
  41  * Machine dependent constants for Intel 386.
  42  */
  43
  44 #ifdef _KERNEL
  45 #include <machine/cpu.h>
  46 #endif
  47
  48 #define _MACHINE        i386
  49 #define MACHINE         "i386"
  50 #define _MACHINE_ARCH   i386
  51 #define MACHINE_ARCH    "i386"
  52 #define MID_MACHINE     MID_I386
  53
  54 #define ALIGNED_POINTER(p,t)    1
  55
  56 #define PGSHIFT         12              /* LOG2(NBPG) */
  57 #define NBPG            (1 << PGSHIFT)  /* bytes/page */
  58 #define PGOFSET         (NBPG-1)        /* byte offset into page */
  59 #define NPTEPG          (NBPG/(sizeof (pt_entry_t)))
  60
  61 #ifndef MAXPHYS
  62 #define MAXPHYS                (64 * 1024)     /* max raw I/O transfer size */
  63 #endif
  64
  65 #if defined(_KERNEL_OPT)
  66 #include "opt_kernbase.h"
  67 #endif /* defined(_KERNEL_OPT) */
  68
  69 #ifdef KERNBASE_LOCORE
  70 #error "You should only re-define KERNBASE"
  71 #endif
  72
  73 #define DEV_BSHIFT      9               /* log2(DEV_BSIZE) */
  74 #define DEV_BSIZE       (1 << DEV_BSHIFT)
  75
  76 /*
  77  * Mach derived conversion macros
  78  */
  79 #define x86_round_pdr(x) \
  80         ((((unsigned long)(x)) + (NBPD_L2 - 1)) & ~(NBPD_L2 - 1))
  81 #define x86_trunc_pdr(x)        ((unsigned long)(x) & ~(NBPD_L2 - 1))
  82 #define x86_btod(x)             ((unsigned long)(x) >> L2_SHIFT)
  83 #define x86_dtob(x)             ((unsigned long)(x) << L2_SHIFT)
  84 #define x86_round_page(x)       ((((paddr_t)(x)) + PGOFSET) & ~PGOFSET)
  85 #define x86_trunc_page(x)       ((paddr_t)(x) & ~PGOFSET)
  86 #define x86_btop(x)             ((paddr_t)(x) >> PGSHIFT)
  87 #define x86_ptob(x)             ((paddr_t)(x) << PGSHIFT)
  88
  89 #ifdef __minix
  90 /* Minix expect to find in this file PAGE_* defines. */
  91 #include <machine/vmparam.h>
  92
  93 #define trunc_page(x) x86_trunc_page(x)
  94 #define round_page(x) x86_round_page(x)
  95
  96 #endif
  97
  98 #endif /* _I386_PARAM_H_ */