sys/arch/evbarm/include/vmparam.h

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 1988 The Regents of the University of California.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #ifndef _ARM32_VMPARAM_H_
  33 #define _ARM32_VMPARAM_H_
  34
  35 #ifdef _KERNEL
  36
  37 #include <arm/arm32/vmparam.h>
  38
  39 /*
  40  * Address space constants
  41  */
  42
  43 /*
  44  * The line between user space and kernel space
  45  * Mappings >= KERNEL_BASE are constant across all processes
  46  */
  47 #ifdef KERNEL_BASE_EXT
  48 #define KERNEL_BASE             KERNEL_BASE_EXT
  49 #else
  50 #define KERNEL_BASE             0x80000000
  51 #endif
  52
  53 /*
  54  * Override the default pager_map size, there's not enough KVA.
  55  */
  56 #define PAGER_MAP_DEFAULT_SIZE          (4 * 1024 * 1024)
  57
  58 /*
  59  * Size of User Raw I/O map
  60  */
  61
  62 #define USRIOSIZE       300
  63
  64 /* virtual sizes (bytes) for various kernel submaps */
  65
  66 #define VM_PHYS_SIZE            (USRIOSIZE*PAGE_SIZE)
  67
  68 /*
  69  * max number of non-contig chunks of physical RAM you can have
  70  */
  71
  72 #define VM_PHYSSEG_MAX          32
  73
  74 /*
  75  * when converting a physical address to a vm_page structure, we
  76  * want to use a binary search on the chunks of physical memory
  77  * to find our RAM
  78  */
  79
  80 #define VM_PHYSSEG_STRAT        VM_PSTRAT_BSEARCH
  81
  82 /*
  83  * this indicates that we can't add RAM to the VM system after the
  84  * vm system is init'd.
  85  */
  86
  87 #define VM_PHYSSEG_NOADD
  88
  89 /*
  90  * we support 2 free lists:
  91  *
  92  *      - DEFAULT for all systems
  93  *      - ISADMA for the ISA DMA range on Sharks only
  94  */
  95
  96 #define VM_NFREELIST            2
  97 #define VM_FREELIST_DEFAULT     0
  98 #define VM_FREELIST_ISADMA      1
  99
 100 #endif /* _KERNEL */
 101
 102 #endif  /* _ARM32_VMPARAM_H_ */