usr/src/lib/libbc/inc/include/sun4/param.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1989 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef _sun4_param_h
  28 #define _sun4_param_h
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 /*
  33  * This file is intended to contain the basic
  34  * specific details of a given architecture.
  35  */
  36
  37 /*
  38  * Machine dependent constants for Sun4.
  39  */
  40
  41 /*
  42  * Define the VAC symbol if we could run on a machine
  43  * which has a Virtual Address Cache (e.g. SUN4_260)
  44  */
  45 #if defined(SUN4_260) || defined(SUN4_470) || defined(SUN4_330)
  46 #define VAC
  47 #else
  48 #undef VAC
  49 #endif  /* SUN4_260 || SUN4_470 || SUN4_330 */
  50
  51 /*
  52  * Define the FPU symbol if we could run on a machine with an external
  53  * FPU (i.e. not integrated with the normal machine state like the vax).
  54  */
  55 #define FPU
  56
  57 /*
  58  * Define the MMU_3LEVEL symbol if we could run on a machine with
  59  * a three level mmu.   We also assume these machines have region
  60  * and user cache flush operations.
  61  */
  62 #ifdef SUN4_470
  63 #define MMU_3LEVEL
  64 #else
  65 #undef MMU_3LEVEL
  66 #endif  /* SUN4_470 */
  67
  68 /*
  69  * Define IOC if we could run on machines that have an I/O cache.
  70  */
  71 #ifdef SUN4_470
  72 #define IOC
  73 #else
  74 #undef IOC
  75 #endif  /* SUN4_470 */
  76
  77 /*
  78  * Define BCOPY_BUF if we could run on machines that have a bcopy buffer.
  79  */
  80 #ifdef SUN4_470
  81 #define BCOPY_BUF
  82 #else
  83 #undef BCOPY_BUF
  84 #endif  /* SUN4_470 */
  85
  86 /*
  87  * Define VA_HOLE for machines that have a hole in the virtual address space.
  88  */
  89 #if defined(SUN4_260) || defined(SUN4_110) || defined(SUN4_330)
  90 #define VA_HOLE
  91 #else
  92 #undef VA_HOLE
  93 #endif  /* SUN4_260 || SUN4_110 || SUN4_330 */
  94
  95 /*
  96  * MMU_PAGES* describes the physical page size used by the mapping hardware.
  97  * PAGES* describes the logical page size used by the system.
  98  */
  99
 100 #define MMU_PAGESIZE    0x2000          /* 8192 bytes */
 101 #define MMU_PAGESHIFT   13              /* log2(MMU_PAGESIZE) */
 102 #define MMU_PAGEOFFSET  (MMU_PAGESIZE-1)/* Mask of address bits in page */
 103 #define MMU_PAGEMASK    (~MMU_PAGEOFFSET)
 104
 105 #define PAGESIZE        0x2000          /* All of the above, for logical */
 106 #define PAGESHIFT       13
 107 #define PAGEOFFSET      (PAGESIZE - 1)
 108 #define PAGEMASK        (~PAGEOFFSET)
 109
 110 /*
 111  * DATA_ALIGN is used to define the alignment of the Unix data segment.
 112  */
 113 #define DATA_ALIGN      0x2000
 114
 115 /*
 116  * Some random macros for units conversion.
 117  */
 118
 119 /*
 120  * MMU pages to bytes, and back (with and without rounding)
 121  */
 122 #define mmu_ptob(x)     ((x) << MMU_PAGESHIFT)
 123 #define mmu_btop(x)     (((unsigned)(x)) >> MMU_PAGESHIFT)
 124 #define mmu_btopr(x)    ((((unsigned)(x) + MMU_PAGEOFFSET) >> MMU_PAGESHIFT))
 125
 126 /*
 127  * pages to bytes, and back (with and without rounding)
 128  */
 129 #define ptob(x)         ((x) << PAGESHIFT)
 130 #define btop(x)         (((unsigned)(x)) >> PAGESHIFT)
 131 #define btopr(x)        ((((unsigned)(x) + PAGEOFFSET) >> PAGESHIFT))
 132
 133 /*
 134  * 2 versions of pages to disk blocks
 135  */
 136 #define mmu_ptod(x)     ((x) << (MMU_PAGESHIFT - DEV_BSHIFT))
 137 #define ptod(x)         ((x) << (PAGESHIFT - DEV_BSHIFT))
 138
 139 /*
 140  * Delay units are in microseconds.
 141  */
 142 #define DELAY(n)        usec_delay(n)
 143 #define CDELAY(c, n)    \
 144 { \
 145         register int N = n; \
 146         while (--N > 0) { \
 147                 if (c) \
 148                         break; \
 149                 usec_delay(1); \
 150         } \
 151 }
 152
 153 #define UPAGES          2       /* pages of u-area, NOT including red zone */
 154 #define KERNSTACK       0x3000  /* size of kernel stack in u-area */
 155
 156 /*
 157  * KERNSIZE the amount of vitual address space the kernel
 158  * uses in all contexts.
 159  */
 160 #define KERNELSIZE      (128*1024*1024)
 161
 162 /*
 163  * KERNELBASE is the virtual address which
 164  * the kernel text/data mapping starts in all contexts.
 165  */
 166 #define KERNELBASE      (0-KERNELSIZE)
 167
 168 /*
 169  * SYSBASE is the virtual address which
 170  * the kernel allocated memory mapping starts in all contexts.
 171  */
 172 #define SYSBASE         (0-(16*1024*1024))
 173
 174 /*
 175  * Msgbuf size.
 176  */
 177 #define MSG_BSIZE       ((7 * 1024) - sizeof (struct msgbuf_hd))
 178
 179 /*
 180  * XXX - Macros for compatibility
 181  */
 182 /* Clicks (MMU PAGES) to disk blocks */
 183 #define ctod(x)         mmu_ptod(x)
 184
 185 /* Clicks (MMU PAGES) to bytes, and back (with rounding) */
 186 #define ctob(x)         mmu_ptob(x)
 187 #define btoc(x)         mmu_btopr(x)
 188
 189 /*
 190  * XXX - Old names for some backwards compatibility
 191  */
 192 #define NBPG            MMU_PAGESIZE
 193 #define PGOFSET         MMU_PAGEOFFSET
 194 #define PGSHIFT         MMU_PAGESHIFT
 195
 196 #define CLSIZE          1
 197 #define CLSIZELOG2      0
 198 #define CLBYTES         PAGESIZE
 199 #define CLOFSET         PAGEOFFSET
 200 #define CLSHIFT         PAGESHIFT
 201 #define clrnd(i)        (i)
 202
 203 #endif /* !_sun4_param_h */