sys/arch/sh3/include/pmap.h

   1 /*      $NetBSD: pmap.h,v 1.33 2008/12/09 20:45:45 pooka 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 /*
  33  * NetBSD/sh3 pmap:
  34  *      pmap.pm_ptp[512] ... 512 slot of page table page
  35  *      page table page contains 1024 PTEs. (PAGE_SIZE / sizeof(pt_entry_t))
  36  *      va -> [ PTP 10bit | PTOFSET 10bit | PGOFSET 12bit ]
  37  */
  38
  39 #ifndef _SH3_PMAP_H_
  40 #define _SH3_PMAP_H_
  41 #include <sys/queue.h>
  42 #include <sh3/pte.h>
  43
  44 #define PMAP_NEED_PROCWR
  45 #define PMAP_STEAL_MEMORY
  46 #define PMAP_GROWKERNEL
  47
  48 #define __PMAP_PTP_N    512     /* # of page table page maps 2GB. */
  49 struct pmap {
  50         pt_entry_t **pm_ptp;
  51         int pm_asid;
  52         int pm_refcnt;
  53         struct pmap_statistics  pm_stats;       /* pmap statistics */
  54 };
  55
  56 void pmap_bootstrap(void);
  57 void pmap_procwr(struct proc *, vaddr_t, size_t);
  58 #define pmap_update(pmap)               ((void)0)
  59 #define pmap_copy(dp,sp,d,l,s)          ((void)0)
  60 #define pmap_wired_count(pmap)          ((pmap)->pm_stats.wired_count)
  61 #define pmap_resident_count(pmap)       ((pmap)->pm_stats.resident_count)
  62
  63 /* ARGSUSED */
  64 static __inline void
  65 pmap_remove_all(struct pmap *pmap)
  66 {
  67         /* Nothing. */
  68 }
  69
  70 /*
  71  * pmap_prefer() helps to avoid virtual cache aliases on SH4 CPUs
  72  * which have the virtually-indexed cache.
  73  */
  74 #ifdef SH4
  75 #define PMAP_PREFER(pa, va, sz, td)     pmap_prefer((pa), (va))
  76 void pmap_prefer(vaddr_t, vaddr_t *);
  77 #endif /* SH4 */
  78
  79 #define PMAP_MAP_POOLPAGE(pa)           SH3_PHYS_TO_P1SEG((pa))
  80 #define PMAP_UNMAP_POOLPAGE(va)         SH3_P1SEG_TO_PHYS((va))
  81
  82 /* MD pmap utils. */
  83 pt_entry_t *__pmap_pte_lookup(pmap_t, vaddr_t);
  84 pt_entry_t *__pmap_kpte_lookup(vaddr_t);
  85 bool __pmap_pte_load(pmap_t, vaddr_t, int);
  86 #endif /* !_SH3_PMAP_H_ */