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   1 /*-
   2  * Copyright (c) 2009, Kohsuke Ohtani
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the author nor the names of any co-contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29 
  30 #ifndef _PPC_MMU_H
  31 #define _PPC_MMU_H
  32 
  33 #include <sys/types.h>
  34 
  35 typedef uint32_t        *pgd_t;         /* page directory */
  36 
  37 struct pte {
  38         uint32_t        pte_hi;
  39         uint32_t        pte_lo;
  40 };
  41 
  42 typedef struct pte      *pte_t;         /* page table entry */
  43 
  44 /*
  45  * Page table entry
  46  */
  47 /* high word: */
  48 #define PTE_VALID       0x00000001      /* valid */
  49 #define PTE_VSID        0x7fffff80      /* virtual segment */
  50 #define PTE_HID         0x00000040      /* hash */
  51 #define PTE_API         0x0000003f      /* abbreviated page index */
  52 
  53 /* low word: */
  54 #define PTE_RPN         0xfffff000      /* real page number */
  55 #define PTE_REF         0x00000100      /* reference */
  56 #define PTE_CHG         0x00000080      /* change */
  57 #define PTE_WIMG        0x00000078      /* memory/cache control */
  58 #define PTE_PP          0x00000003      /* page protection */
  59 
  60 /*
  61  *  Virtual and physical address translation
  62  */
  63 #define PAGE_DIR(virt)
  64 #define PAGE_TABLE(virt)
  65 
  66 #define pte_present(pgd, virt)
  67 
  68 #define page_present(pte, virt)
  69 
  70 #define vtopte(pgd, virt)
  71 
  72 #define ptetopg(pte, virt)
  73 
  74 #endif /* !_PPC_MMU_H */

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