sys/arch/mips/include/vmparam.h

   1 /*      $NetBSD: vmparam.h,v 1.43 2009/08/09 04:02:40 matt Exp $        */
   2
   3 /*
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * the Systems Programming Group of the University of Utah Computer
   9  * Science Department and Ralph Campbell.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  * from: Utah Hdr: vmparam.h 1.16 91/01/18
  36  *
  37  *      @(#)vmparam.h   8.2 (Berkeley) 4/22/94
  38  */
  39 /*
  40  * Copyright (c) 1988 University of Utah.
  41  *
  42  * This code is derived from software contributed to Berkeley by
  43  * the Systems Programming Group of the University of Utah Computer
  44  * Science Department and Ralph Campbell.
  45  *
  46  * Redistribution and use in source and binary forms, with or without
  47  * modification, are permitted provided that the following conditions
  48  * are met:
  49  * 1. Redistributions of source code must retain the above copyright
  50  *    notice, this list of conditions and the following disclaimer.
  51  * 2. Redistributions in binary form must reproduce the above copyright
  52  *    notice, this list of conditions and the following disclaimer in the
  53  *    documentation and/or other materials provided with the distribution.
  54  * 3. All advertising materials mentioning features or use of this software
  55  *    must display the following acknowledgement:
  56  *      This product includes software developed by the University of
  57  *      California, Berkeley and its contributors.
  58  * 4. Neither the name of the University nor the names of its contributors
  59  *    may be used to endorse or promote products derived from this software
  60  *    without specific prior written permission.
  61  *
  62  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  63  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  64  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  65  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  66  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  67  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  68  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  69  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  70  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  71  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  72  * SUCH DAMAGE.
  73  *
  74  * from: Utah Hdr: vmparam.h 1.16 91/01/18
  75  *
  76  *      @(#)vmparam.h   8.2 (Berkeley) 4/22/94
  77  */
  78
  79 #ifndef _MIPS_VMPARAM_H_
  80 #define _MIPS_VMPARAM_H_
  81
  82 /*
  83  * Machine dependent VM constants for MIPS.
  84  */
  85
  86 /*
  87  * We normally use a 4K page but may use 16K on MIPS systems.
  88  * Override PAGE_* definitions to compile-time constants.
  89  */
  90 #ifdef ENABLE_MIPS_16KB_PAGE
  91 #define PAGE_SHIFT      14
  92 #elif defined(ENABLE_MIPS_4KB_PAGE) || 1
  93 #define PAGE_SHIFT      12
  94 #else
  95 #error ENABLE_MIPS_xKB_PAGE not defined
  96 #endif
  97 #define PAGE_SIZE       (1 << PAGE_SHIFT)
  98 #define PAGE_MASK       (PAGE_SIZE - 1)
  99
 100 /*
 101  * USRSTACK is the top (end) of the user stack.
 102  *
 103  * USRSTACK needs to start a little below 0x8000000 because the R8000
 104  * and some QED CPUs perform some virtual address checks before the
 105  * offset is calculated.
 106  */
 107 #define USRSTACK        (VM_MAXUSER_ADDRESS-PAGE_SIZE) /* Start of user stack */
 108 #define USRSTACK32      ((uint32_t)VM_MAXUSER32_ADDRESS-PAGE_SIZE)
 109
 110 /* alignment requirement for u-area space in bytes */
 111 #define USPACE_ALIGN    USPACE
 112
 113 /*
 114  * Virtual memory related constants, all in bytes
 115  */
 116 #ifndef MAXTSIZ
 117 #define MAXTSIZ         (64*1024*1024)          /* max text size */
 118 #endif
 119 #ifndef DFLDSIZ
 120 #define DFLDSIZ         (128*1024*1024)         /* initial data size limit */
 121 #endif
 122 #ifndef MAXDSIZ
 123 #define MAXDSIZ         (512*1024*1024)         /* max data size */
 124 #endif
 125 #ifndef DFLSSIZ
 126 #define DFLSSIZ         (4*1024*1024)           /* initial stack size limit */
 127 #endif
 128 #ifndef MAXSSIZ
 129 #define MAXSSIZ         (32*1024*1024)          /* max stack size */
 130 #endif
 131
 132 /*
 133  * Virtual memory related constants, all in bytes
 134  */
 135 #ifndef MAXTSIZ32
 136 #define MAXTSIZ32       MAXTSIZ                 /* max text size */
 137 #endif
 138 #ifndef DFLDSIZ32
 139 #define DFLDSIZ32       DFLDSIZ                 /* initial data size limit */
 140 #endif
 141 #ifndef MAXDSIZ32
 142 #define MAXDSIZ32       MAXDSIZ                 /* max data size */
 143 #endif
 144 #ifndef DFLSSIZ32
 145 #define DFLSSIZ32       DFLTSIZ                 /* initial stack size limit */
 146 #endif
 147 #ifndef MAXSSIZ32
 148 #define MAXSSIZ32       MAXSSIZ                 /* max stack size */
 149 #endif
 150
 151 /*
 152  * PTEs for mapping user space into the kernel for phyio operations.
 153  * The default PTE number is enough to cover 8 disks * MAXBSIZE.
 154  */
 155 #ifndef USRIOSIZE
 156 #define USRIOSIZE       (MAXBSIZE/PAGE_SIZE * 8)
 157 #endif
 158
 159 /*
 160  * Mach derived constants
 161  */
 162
 163 /*
 164  * user/kernel map constants
 165  * These are negative addresses since MIPS addresses are signed.
 166  */
 167 #define VM_MIN_ADDRESS          ((vaddr_t)0x00000000)
 168 #ifdef _LP64
 169 #if 1
 170 #define VM_MAXUSER_ADDRESS      ((vaddr_t) 1L << 31)    /* 0x0000000080000000 */
 171 #else
 172 #define VM_MAXUSER_ADDRESS      ((vaddr_t) 1L << 62)    /* 0x4000000000000000 */
 173 #endif
 174 #define VM_MAX_ADDRESS          VM_MAXUSER_ADDRESS
 175 #define VM_MIN_KERNEL_ADDRESS   ((vaddr_t) 3L << 62)    /* 0xC000000000000000 */
 176 #define VM_MAX_KERNEL_ADDRESS   ((vaddr_t) -1L << 31)   /* 0xFFFFFFFF80000000 */
 177 #else
 178 #define VM_MAXUSER_ADDRESS      ((vaddr_t)-0x7fffffff-1)/* 0xFFFFFFFF80000000 */
 179 #define VM_MAX_ADDRESS          ((vaddr_t)-0x7fffffff-1)/* 0xFFFFFFFF80000000 */
 180 #define VM_MIN_KERNEL_ADDRESS   ((vaddr_t)-0x40000000)  /* 0xFFFFFFFFC0000000 */
 181 #ifdef ENABLE_MIPS_TX3900
 182 #define VM_MAX_KERNEL_ADDRESS   ((vaddr_t)-0x01000000)  /* 0xFFFFFFFFFF000000 */
 183 #else
 184 #define VM_MAX_KERNEL_ADDRESS   ((vaddr_t)-0x00004000)  /* 0xFFFFFFFFFFFFC000 */
 185 #endif
 186 #endif
 187 #define VM_MAXUSER32_ADDRESS    ((vaddr_t)(1UL << 31))/* 0x0000000080000000 */
 188
 189 /*
 190  * The address to which unspecified mapping requests default
 191  */
 192 #define __USE_TOPDOWN_VM
 193 #define VM_DEFAULT_ADDRESS(da, sz) \
 194         trunc_page(USRSTACK - MAXSSIZ - (sz))
 195 #define VM_DEFAULT_ADDRESS32(da, sz) \
 196         trunc_page(USRSTACK32 - MAXSSIZ32 - (sz))
 197
 198 /* virtual sizes (bytes) for various kernel submaps */
 199 #define VM_PHYS_SIZE            (USRIOSIZE*PAGE_SIZE)
 200
 201 /* VM_PHYSSEG_MAX defined by platform-dependent code. */
 202 #define VM_PHYSSEG_STRAT        VM_PSTRAT_BSEARCH
 203 #define VM_PHYSSEG_NOADD        /* can add RAM after vm_mem_init */
 204
 205 #define __HAVE_VM_PAGE_MD
 206
 207 /*
 208  * pmap-specific data stored in the vm_page structure.
 209  */
 210 struct vm_page_md {
 211         struct pv_entry *pvh_list;      /* pv_entry list */
 212         u_int pvh_attrs;                /* page attributes */
 213 };
 214
 215 #define VM_MDPAGE_INIT(pg)                                              \
 216 do {                                                                    \
 217         (pg)->mdpage.pvh_list = NULL;                                   \
 218 } while (/* CONSTCOND */ 0)
 219
 220 #ifndef VM_NFREELIST
 221 #define VM_NFREELIST            16      /* 16 distinct memory segments */
 222 #define VM_FREELIST_DEFAULT     0
 223 #define VM_FREELIST_FIRST16M    1       /* ISA DMA range */
 224 #define VM_FREELIST_FIRST512M   2       /* KSEG0/1 */
 225 #define VM_FREELIST_FIRST4G     3       /* 32bit addrs */
 226 #define VM_FREELIST_MAX         4
 227 #endif
 228
 229 #endif /* ! _MIPS_VMPARAM_H_ */