sys/arch/sh3/include/vmparam.h

   1 /*      $NetBSD: vmparam.h,v 1.18 2008/04/28 20:23:35 martin Exp $      */
   2
   3 /*-
   4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by UCHIYAMA Yasushi.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #ifndef _SH3_VMPARAM_H_
  33 #define _SH3_VMPARAM_H_
  34 #include <sys/queue.h>
  35
  36 /*
  37  * We use 4K pages on the sh3/sh4.  Override the PAGE_* definitions
  38  * to be compile-time constants.
  39  */
  40 #define PAGE_SHIFT      12
  41 #define PAGE_SIZE       (1 << PAGE_SHIFT)
  42 #define PAGE_MASK       (PAGE_SIZE - 1)
  43
  44 /* Virtual address map. */
  45 #define VM_MIN_ADDRESS          ((vaddr_t)0)
  46 #define VM_MAXUSER_ADDRESS      ((vaddr_t)0x7ffff000)
  47 #define VM_MAX_ADDRESS          ((vaddr_t)0x7ffff000)
  48 #define VM_MIN_KERNEL_ADDRESS   ((vaddr_t)0xc0000000)
  49 #define VM_MAX_KERNEL_ADDRESS   ((vaddr_t)0xe0000000)
  50
  51 /* top of stack */
  52 #define USRSTACK                VM_MAXUSER_ADDRESS
  53
  54 /* Virtual memory resoruce limit. */
  55 #define MAXTSIZ                 (64 * 1024 * 1024)      /* max text size */
  56 #ifndef MAXDSIZ
  57 #define MAXDSIZ                 (512 * 1024 * 1024)     /* max data size */
  58 #endif
  59 #ifndef MAXSSIZ
  60 #define MAXSSIZ                 (32 * 1024 * 1024)      /* max stack size */
  61 #endif
  62
  63 /* initial data size limit */
  64 #ifndef DFLDSIZ
  65 #define DFLDSIZ                 (128 * 1024 * 1024)
  66 #endif
  67 /* initial stack size limit */
  68 #ifndef DFLSSIZ
  69 #define DFLSSIZ                 (2 * 1024 * 1024)
  70 #endif
  71
  72 /* Size of user raw I/O map */
  73 #ifndef USRIOSIZE
  74 #define USRIOSIZE               (MAXBSIZE / PAGE_SIZE * 8)
  75 #endif
  76
  77 #define VM_PHYS_SIZE            (USRIOSIZE * PAGE_SIZE)
  78
  79 /* Physical memory segments */
  80 #define VM_PHYSSEG_STRAT        VM_PSTRAT_BSEARCH
  81 #define VM_PHYSSEG_NOADD
  82
  83 #define sh3_round_page(x)       ((((uint32_t)(x)) + PGOFSET) & ~PGOFSET)
  84 #define sh3_trunc_page(x)       ((uint32_t)(x) & ~PGOFSET)
  85 #define sh3_btop(x)             ((uint32_t)(x) >> PGSHIFT)
  86 #define sh3_ptob(x)             ((uint32_t)(x) << PGSHIFT)
  87
  88 /* pmap-specific data store in the vm_page structure. */
  89 #define __HAVE_VM_PAGE_MD
  90 #define PVH_REFERENCED          1
  91 #define PVH_MODIFIED            2
  92
  93 #ifndef _LOCORE
  94 struct pv_entry;
  95 struct vm_page_md {
  96         SLIST_HEAD(, pv_entry) pvh_head;
  97         int pvh_flags;
  98 };
  99
 100 #define VM_MDPAGE_INIT(pg)                                              \
 101 do {                                                                    \
 102         struct vm_page_md *pvh = &(pg)->mdpage;                         \
 103         SLIST_INIT(&pvh->pvh_head);                                     \
 104         pvh->pvh_flags = 0;                                             \
 105 } while (/*CONSTCOND*/0)
 106 #endif /* _LOCORE */
 107 #endif /* !_SH3_VMPARAM_H_ */