sys/arch/powerpc/include/param.h

   1 /*      $NetBSD$        */
   2
   3 /*-
   4  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
   5  * Copyright (C) 1995, 1996 TooLs GmbH.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by TooLs GmbH.
  19  * 4. The name of TooLs GmbH may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #ifndef _POWERPC_PARAM_H
  35 #define _POWERPC_PARAM_H
  36
  37 #ifdef  _KERNEL
  38 #if defined(_KERNEL_OPT)
  39 #include "opt_ppcarch.h"
  40 #endif
  41 #ifndef _LOCORE
  42 #include <machine/cpu.h>
  43 #endif  /* _LOCORE */
  44 #endif
  45
  46 /*
  47  * Machine dependent constants for PowerPC (32-bit only currently)
  48  */
  49 #ifndef MACHINE
  50 #define MACHINE         "powerpc"
  51 #endif
  52 #define MACHINE_ARCH    "powerpc"
  53 #define MID_MACHINE     MID_POWERPC
  54
  55 #define ALIGNBYTES              (sizeof(double) - 1)
  56 #define ALIGN(p)                (((u_long)(p) + ALIGNBYTES) & ~ALIGNBYTES)
  57 #define ALIGNED_POINTER(p,t)    ((((u_long)(p)) & (sizeof(t)-1)) == 0)
  58
  59 #ifdef PPC_IBM4XX
  60 #define PGSHIFT         14      /* Use 16KB to reduce TLB thrashing */
  61 #define UPAGES          1
  62 #else
  63 #define PGSHIFT         12
  64 #define UPAGES          4
  65 #endif
  66 #define NBPG            (1 << PGSHIFT)  /* Page size */
  67 #define PGOFSET         (NBPG - 1)
  68
  69 #define DEV_BSHIFT      9               /* log2(DEV_BSIZE) */
  70 #define DEV_BSIZE       (1 << DEV_BSHIFT)
  71 #define BLKDEV_IOSIZE   NBPG
  72 #ifndef MAXPHYS
  73 #define MAXPHYS         (64 * 1024)     /* max raw I/O transfer size */
  74 #endif
  75
  76 #define USPACE          (UPAGES * NBPG)
  77
  78 #ifndef MSGBUFSIZE
  79 #define MSGBUFSIZE      (2*NBPG)        /* default message buffer size */
  80 #endif
  81
  82 #ifndef KERNBASE
  83 #define KERNBASE        0x100000
  84 #endif
  85
  86 /*
  87  * Constants related to network buffer management.
  88  * MCLBYTES must be no larger than NBPG (the software page size), and,
  89  * on machines that exchange pages of input or output buffers with mbuf
  90  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
  91  * of the hardware page size.
  92  */
  93 #ifndef MSIZE
  94 #define MSIZE           256             /* size of an mbuf */
  95 #endif
  96 #ifndef MCLSHIFT
  97 #define MCLSHIFT        11              /* convert bytes to m_buf clusters */
  98 #endif
  99 #define MCLBYTES        (1 << MCLSHIFT) /* size of a m_buf cluster */
 100
 101 #ifndef NMBCLUSTERS
 102
 103 #if defined(_KERNEL_OPT)
 104 #include "opt_gateway.h"
 105 #endif
 106
 107 #ifdef GATEWAY
 108 #define NMBCLUSTERS     2048            /* map size, max cluster allocation */
 109 #else
 110 #define NMBCLUSTERS     1024            /* map size, max cluster allocation */
 111 #endif
 112 #endif
 113
 114 /*
 115  * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
 116  * logical pages.
 117  */
 118 #ifndef NKMEMPAGES_MIN_DEFAULT
 119 #define NKMEMPAGES_MIN_DEFAULT  ((16 * 1024 * 1024) >> PAGE_SHIFT)
 120 #endif
 121 #ifndef NKMEMPAGES_MAX_DEFAULT
 122 #define NKMEMPAGES_MAX_DEFAULT  ((128 * 1024 * 1024) >> PAGE_SHIFT)
 123 #endif
 124
 125 #endif /* _POWERPC_PARAM_H_ */