sys/arch/arm/include/arm32/vmparam.h

   1 /*      $NetBSD: vmparam.h,v 1.39 2015/06/20 07:13:25 skrll Exp $       */
   2
   3 /*
   4  * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the NetBSD Project by
  20  *      Wasabi Systems, Inc.
  21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  22  *    or promote products derived from this software without specific prior
  23  *    written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #ifndef _ARM_ARM32_VMPARAM_H_
  39 #define _ARM_ARM32_VMPARAM_H_
  40
  41 #if defined(_KERNEL) || defined(_KMEMUSER) || defined(__minix)
  42
  43 /*
  44  * Virtual Memory parameters common to all arm32 platforms.
  45  */
  46
  47 #include <arm/cpuconf.h>
  48 #include <arm/arm32/pte.h>      /* pt_entry_t */
  49
  50 #define __USE_TOPDOWN_VM
  51 #define USRSTACK        VM_MAXUSER_ADDRESS
  52
  53 /*
  54  * ARMv4 systems are normaly configured for 256MB KVA only, so restrict
  55  * the size of the pager map to 4MB.
  56  */
  57 #ifndef _ARM_ARCH_5
  58 #define PAGER_MAP_DEFAULT_SIZE          (4 * 1024 * 1024)
  59 #endif
  60
  61 /*
  62  * Note that MAXTSIZ can't be larger than 32M, otherwise the compiler
  63  * would have to be changed to not generate "bl" instructions.
  64  */
  65 #define MAXTSIZ         (128*1024*1024)         /* max text size */
  66 #ifndef DFLDSIZ
  67 #define DFLDSIZ         (384*1024*1024)         /* initial data size limit */
  68 #endif
  69 #ifndef MAXDSIZ
  70 #define MAXDSIZ         (1536*1024*1024)        /* max data size */
  71 #endif
  72 #ifndef DFLSSIZ
  73 #define DFLSSIZ         (4*1024*1024)           /* initial stack size limit */
  74 #endif
  75 #ifndef MAXSSIZ
  76 #define MAXSSIZ         (64*1024*1024)          /* max stack size */
  77 #endif
  78
  79 /*
  80  * While the ARM architecture defines Section mappings, large pages,
  81  * and small pages, the standard page size is (and will always be) 4K.
  82  */
  83 #define PAGE_SHIFT      PGSHIFT
  84 #define PAGE_SIZE       (1 << PAGE_SHIFT)
  85 #define PAGE_MASK       (PAGE_SIZE - 1)
  86
  87 /*
  88  * Mach derived constants
  89  */
  90 #define VM_MIN_ADDRESS          ((vaddr_t) PAGE_SIZE)
  91 #ifdef ARM_MMU_EXTENDED
  92 #define VM_MAXUSER_ADDRESS      ((vaddr_t) 0x80000000 - PAGE_SIZE)
  93 #else
  94 #define VM_MAXUSER_ADDRESS      ((vaddr_t) KERNEL_BASE - PAGE_SIZE)
  95 #endif
  96 #define VM_MAX_ADDRESS          VM_MAXUSER_ADDRESS
  97
  98 #define VM_MIN_KERNEL_ADDRESS   ((vaddr_t) KERNEL_BASE)
  99 #define VM_MAX_KERNEL_ADDRESS   ((vaddr_t) -(PAGE_SIZE+1))
 100
 101 #if !defined(__minix)
 102 #ifndef __ASSEMBLER__
 103 /* XXX max. amount of KVM to be used by buffers. */
 104 #ifndef VM_MAX_KERNEL_BUF
 105 extern vaddr_t virtual_avail;
 106 extern vaddr_t virtual_end;
 107
 108 #define VM_MAX_KERNEL_BUF       \
 109         ((virtual_end - virtual_avail) * 4 / 10)
 110 #endif
 111 #endif /* __ASSEMBLER__ */
 112 #endif /* !defined(__minix) */
 113
 114 #endif /* _KERNEL || _KMEMUSER */
 115
 116 #endif /* _ARM_ARM32_VMPARAM_H_ */