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

   1 /*      $NetBSD: vmparam.h,v 1.23 2008/08/06 19:13:45 matt 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 #ifdef _KERNEL
  42
  43 /*
  44  * Virtual Memory parameters common to all arm32 platforms.
  45  */
  46
  47 #ifndef __ASSEMBLER__
  48 #include <sys/simplelock.h>     /* struct simplelock */
  49 #endif /* __ASSEMBLER__ */
  50 #include <arm/arm32/pte.h>      /* pt_entry_t */
  51
  52 #define USRSTACK        VM_MAXUSER_ADDRESS
  53
  54 /*
  55  * Note that MAXTSIZ can't be larger than 32M, otherwise the compiler
  56  * would have to be changed to not generate "bl" instructions.
  57  */
  58 #define MAXTSIZ         (16*1024*1024)          /* max text size */
  59 #ifndef DFLDSIZ
  60 #define DFLDSIZ         (128*1024*1024)         /* initial data size limit */
  61 #endif
  62 #ifndef MAXDSIZ
  63 #define MAXDSIZ         (512*1024*1024)         /* max data size */
  64 #endif
  65 #ifndef DFLSSIZ
  66 #define DFLSSIZ         (2*1024*1024)           /* initial stack size limit */
  67 #endif
  68 #ifndef MAXSSIZ
  69 #define MAXSSIZ         (8*1024*1024)           /* max stack size */
  70 #endif
  71
  72 /*
  73  * While the ARM architecture defines Section mappings, large pages,
  74  * and small pages, the standard page size is (and will always be) 4K.
  75  */
  76 #define PAGE_SHIFT      12
  77 #define PAGE_SIZE       (1 << PAGE_SHIFT)
  78 #define PAGE_MASK       (PAGE_SIZE - 1)
  79
  80 /*
  81  * Mach derived constants
  82  */
  83 #define VM_MIN_ADDRESS          ((vaddr_t) 0x00001000)
  84 #define VM_MAXUSER_ADDRESS      ((vaddr_t) KERNEL_BASE)
  85 #define VM_MAX_ADDRESS          VM_MAXUSER_ADDRESS
  86
  87 #define VM_MIN_KERNEL_ADDRESS   ((vaddr_t) KERNEL_BASE)
  88 #define VM_MAX_KERNEL_ADDRESS   ((vaddr_t) 0xffffffff)
  89
  90 #ifndef __ASSEMBLER__
  91 /* XXX max. amount of KVM to be used by buffers. */
  92 #ifndef VM_MAX_KERNEL_BUF
  93 extern vaddr_t virtual_avail;
  94 extern vaddr_t virtual_end;
  95
  96 #define VM_MAX_KERNEL_BUF       \
  97         ((virtual_end - virtual_avail) * 4 / 10)
  98 #endif
  99
 100 /*
 101  * pmap-specific data store in the vm_page structure.
 102  */
 103 #define __HAVE_VM_PAGE_MD
 104 struct vm_page_md {
 105         SLIST_HEAD(,pv_entry) pvh_list;         /* pv_entry list */
 106         struct simplelock pvh_slock;            /* lock on this head */
 107         int pvh_attrs;                          /* page attributes */
 108         u_int uro_mappings;
 109         u_int urw_mappings;
 110         union {
 111                 u_short s_mappings[2];  /* Assume kernel count <= 65535 */
 112                 u_int i_mappings;
 113         } k_u;
 114 #define kro_mappings    k_u.s_mappings[0]
 115 #define krw_mappings    k_u.s_mappings[1]
 116 #define k_mappings      k_u.i_mappings
 117 };
 118
 119 /*
 120  * Set the default color of each page.
 121  */
 122 #if ARM_MMU_V6 > 0
 123 #define VM_MDPAGE_PVH_ATTRS_INIT(pg) \
 124         (pg)->mdpage.pvh_attrs = (pg)->phys_addr & arm_cache_prefer_mask
 125 #else
 126 #define VM_MDPAGE_PVH_ATTRS_INIT(pg) \
 127         (pg)->mdpage.pvh_attrs = 0
 128 #endif
 129
 130
 131 #define VM_MDPAGE_INIT(pg)                                              \
 132 do {                                                                    \
 133         SLIST_INIT(&(pg)->mdpage.pvh_list);                             \
 134         simple_lock_init(&(pg)->mdpage.pvh_slock);                      \
 135         VM_MDPAGE_PVH_ATTRS_INIT(pg);                                   \
 136         (pg)->mdpage.uro_mappings = 0;                                  \
 137         (pg)->mdpage.urw_mappings = 0;                                  \
 138         (pg)->mdpage.k_mappings = 0;                                    \
 139 } while (/*CONSTCOND*/0)
 140 #endif /* __ASSEMBLER__ */
 141
 142 #endif /* _KERNEL */
 143
 144 #endif /* _ARM_ARM32_VMPARAM_H_ */