sys/arch/sun3/include/pmap3x.h

   1 /*      $NetBSD: pmap3x.h,v 1.27 2009/12/11 13:52:57 tsutsui Exp $      */
   2
   3 /*-
   4  * Copyright (c) 1997 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jeremy Cooper.
   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 /*
  33  * Physical map structures exported to the VM code.
  34  * XXX - Does user-level code really see this struct?
  35  */
  36
  37 #include <sys/simplelock.h>
  38
  39 struct pmap {
  40         struct a_tmgr_struct    *pm_a_tmgr;     /* Level-A table manager */
  41         u_long                  pm_a_phys;      /* MMU level-A phys addr */
  42         struct simplelock       pm_lock;        /* lock on pmap */
  43         int                     pm_refcount;    /* reference count */
  44         int                     pm_version;
  45 };
  46
  47 #ifdef _KERNEL
  48 /* Common function for pmap_resident_count(), pmap_wired_count() */
  49 segsz_t pmap_count(pmap_t, int);
  50
  51 /* This needs to be a macro for kern_sysctl.c */
  52 #define pmap_resident_count(pmap)       (pmap_count((pmap), 0))
  53
  54 /* This needs to be a macro for vm_mmap.c */
  55 #define pmap_wired_count(pmap)          (pmap_count((pmap), 1))
  56
  57 /* We use the PA plus some low bits for device mmap. */
  58 #define pmap_phys_address(addr)         (addr)
  59
  60 #define pmap_update(pmap)               /* nothing (yet) */
  61
  62 /* Map a given physical region to a virtual region */
  63 vaddr_t pmap_map(vaddr_t, paddr_t, paddr_t, int);
  64
  65 static __inline void
  66 pmap_remove_all(struct pmap *pmap)
  67 {
  68         /* Nothing. */
  69 }
  70
  71 /*
  72  * Flags to tell pmap_enter `this is not to be cached', etc.
  73  * Since physical addresses are always aligned, we can use
  74  * the low order bits for this.
  75  */
  76 #define PMAP_OBMEM      0x00    /* unused */
  77 #define PMAP_OBIO       0x00    /* unused */
  78 #define PMAP_VME16      0x10    /* pmap will add the necessary offset */
  79 #define PMAP_VME32      0x20    /* etc. */
  80 #define PMAP_NC         0x40    /* tells pmap_enter to set PTE_CI */
  81 #define PMAP_SPEC       0xFF    /* mask to get all above. */
  82
  83 #endif  /* _KERNEL */
  84
  85 /* MMU specific segment size */
  86 #define SEGSHIFT        19              /* LOG2(NBSG) */
  87 #define NBSG            (1 << SEGSHIFT) /* bytes/segment */
  88 #define SEGOFSET        (NBSG - 1)      /* byte offset into segment */
  89
  90 #define sun3x_round_seg(x)      ((((vaddr_t)(x)) + SEGOFSET) & ~SEGOFSET)
  91 #define sun3x_trunc_seg(x)      ((vaddr_t)(x) & ~SEGOFSET)
  92 #define sun3x_seg_offset(x)     ((vaddr_t)(x) & SEGOFSET)