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scoutos / prex-0.9.0 / bsp / hal / ppc / include / mmu.h @ 03e9c04a

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/*-
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 * Copyright (c) 2009, Kohsuke Ohtani
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the author nor the names of any co-contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#ifndef _PPC_MMU_H
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#define _PPC_MMU_H
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#include <sys/types.h>
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typedef uint32_t        *pgd_t;                /* page directory */
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struct pte {
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        uint32_t        pte_hi;
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        uint32_t        pte_lo;
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};
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typedef struct pte        *pte_t;                /* page table entry */
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/*
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 * Page table entry
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 */
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/* high word: */
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#define PTE_VALID        0x00000001        /* valid */
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#define        PTE_VSID        0x7fffff80        /* virtual segment */
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#define        PTE_HID                0x00000040        /* hash */
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#define        PTE_API                0x0000003f        /* abbreviated page index */
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/* low word: */
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#define        PTE_RPN                0xfffff000        /* real page number */
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#define        PTE_REF                0x00000100        /* reference */
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#define        PTE_CHG                0x00000080        /* change */
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#define        PTE_WIMG        0x00000078        /* memory/cache control */
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#define        PTE_PP                0x00000003        /* page protection */
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/*
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 *  Virtual and physical address translation
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 */
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#define PAGE_DIR(virt)
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#define PAGE_TABLE(virt)
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#define pte_present(pgd, virt)
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#define page_present(pte, virt)
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#define vtopte(pgd, virt)
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#define ptetopg(pte, virt)
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#endif /* !_PPC_MMU_H */