scoutos / prex-0.9.0 / bsp / hal / ppc / include / mmu.h @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*-
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2 | * Copyright (c) 2009, Kohsuke Ohtani
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions
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7 | * are met:
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8 | * 1. Redistributions of source code must retain the above copyright
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9 | * notice, this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright
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11 | * notice, this list of conditions and the following disclaimer in the
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12 | * documentation and/or other materials provided with the distribution.
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13 | * 3. Neither the name of the author nor the names of any co-contributors
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14 | * may be used to endorse or promote products derived from this software
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15 | * without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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27 | * SUCH DAMAGE.
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28 | */
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29 | |||
30 | #ifndef _PPC_MMU_H
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31 | #define _PPC_MMU_H
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32 | |||
33 | #include <sys/types.h> |
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34 | |||
35 | typedef uint32_t *pgd_t; /* page directory */ |
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36 | |||
37 | struct pte {
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38 | uint32_t pte_hi; |
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39 | uint32_t pte_lo; |
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40 | }; |
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41 | |||
42 | typedef struct pte *pte_t; /* page table entry */ |
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43 | |||
44 | /*
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45 | * Page table entry
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46 | */
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47 | /* high word: */
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48 | #define PTE_VALID 0x00000001 /* valid */ |
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49 | #define PTE_VSID 0x7fffff80 /* virtual segment */ |
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50 | #define PTE_HID 0x00000040 /* hash */ |
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51 | #define PTE_API 0x0000003f /* abbreviated page index */ |
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52 | |||
53 | /* low word: */
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54 | #define PTE_RPN 0xfffff000 /* real page number */ |
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55 | #define PTE_REF 0x00000100 /* reference */ |
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56 | #define PTE_CHG 0x00000080 /* change */ |
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57 | #define PTE_WIMG 0x00000078 /* memory/cache control */ |
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58 | #define PTE_PP 0x00000003 /* page protection */ |
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59 | |||
60 | /*
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61 | * Virtual and physical address translation
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62 | */
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63 | #define PAGE_DIR(virt)
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64 | #define PAGE_TABLE(virt)
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65 | |||
66 | #define pte_present(pgd, virt)
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67 | |||
68 | #define page_present(pte, virt)
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69 | |||
70 | #define vtopte(pgd, virt)
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71 | |||
72 | #define ptetopg(pte, virt)
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73 | |||
74 | #endif /* !_PPC_MMU_H */ |