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| Commit | Line | Data |
|---|---|---|
| 2039e74a AF |
1 | /* |
| 2 | * Copyright (c) 1987 Carnegie-Mellon University | |
| 3 | * Copyright (c) 1992 OMRON Corporation. | |
| 4 | * Copyright (c) 1991, 1992 Regents of the University of California. | |
| 5 | * All rights reserved. | |
| 6 | * | |
| 7 | * This code is derived from software contributed to Berkeley by | |
| 8 | * the Systems Programming Group of the University of Utah Computer | |
| 9 | * Science Department. | |
| 10 | * | |
| 11 | * %sccs.include.redist.c% | |
| 12 | * | |
| 13 | * OMRON: $Id: pmap.h,v 1.2 92/06/14 06:29:43 moti Exp $ | |
| 14 | * | |
| ebe31ef3 | 15 | * @(#)pmap.h 7.2 (Berkeley) %G% |
| 2039e74a AF |
16 | */ |
| 17 | ||
| 18 | #ifndef _PMAP_MACHINE_ | |
| 19 | #define _PMAP_MACHINE_ | |
| 20 | ||
| 21 | #define LUNA_PAGE_SIZE NBPG | |
| 22 | #define LUNA_SEG_SIZE NBSEG | |
| 23 | ||
| 24 | #define luna_trunc_seg(x) (((unsigned)(x)) & ~(LUNA_SEG_SIZE-1)) | |
| 25 | #define luna_round_seg(x) luna_trunc_seg((unsigned)(x) + LUNA_SEG_SIZE-1) | |
| 26 | ||
| 27 | /* | |
| 28 | * Pmap stuff | |
| 29 | */ | |
| 30 | struct pmap { | |
| 31 | struct pte *pm_ptab; /* KVA of page table */ | |
| 32 | struct ste *pm_stab; /* KVA of segment table */ | |
| 33 | int pm_stchanged; /* ST changed */ | |
| 34 | int pm_stfree; /* 040: free lev2 blocks */ | |
| 35 | struct ste *pm_stpa; /* 040: ST phys addr */ | |
| 36 | short pm_sref; /* segment table ref count */ | |
| 37 | short pm_count; /* pmap reference count */ | |
| 38 | simple_lock_data_t pm_lock; /* lock on pmap */ | |
| 39 | struct pmap_statistics pm_stats; /* pmap statistics */ | |
| 40 | long pm_ptpages; /* more stats: PT pages */ | |
| 41 | }; | |
| 42 | ||
| 43 | typedef struct pmap *pmap_t; | |
| 44 | ||
| 45 | extern struct pmap kernel_pmap_store; | |
| 46 | #define kernel_pmap (&kernel_pmap_store) | |
| 47 | ||
| 48 | /* | |
| 49 | * On the 040 we keep track of which level 2 blocks are already in use | |
| 50 | * with the pm_stfree mask. Bits are arranged from LSB (block 0) to MSB | |
| 51 | * (block 31). For convenience, the level 1 table is considered to be | |
| 52 | * block 0. | |
| 53 | * | |
| 54 | * MAX[KU]L2SIZE control how many pages of level 2 descriptors are allowed. | |
| 55 | * for the kernel and users. 8 implies only the initial "segment table" | |
| 56 | * page is used. WARNING: don't change MAXUL2SIZE unless you can allocate | |
| 57 | * physically contiguous pages for the ST in pmap.c! | |
| 58 | */ | |
| 59 | #define MAXKL2SIZE 16 | |
| 60 | #define MAXUL2SIZE 8 | |
| 61 | #define l2tobm(n) (1 << (n)) | |
| 62 | #define bmtol2(n) (ffs(n) - 1) | |
| 63 | ||
| 64 | /* | |
| 65 | * Macros for speed | |
| 66 | */ | |
| 67 | #define PMAP_ACTIVATE(pmapp, pcbp, iscurproc) \ | |
| 68 | if ((pmapp) != NULL && (pmapp)->pm_stchanged) { \ | |
| ebe31ef3 | 69 | (pcbp)->pcb_ustp = luna_btop((vm_offset_t)(pmapp)->pm_stpa); \ |
| 2039e74a AF |
70 | if (iscurproc) \ |
| 71 | loadustp((pcbp)->pcb_ustp); \ | |
| 72 | (pmapp)->pm_stchanged = FALSE; \ | |
| 73 | } | |
| 74 | #define PMAP_DEACTIVATE(pmapp, pcbp) | |
| 75 | ||
| 76 | /* | |
| 77 | * For each vm_page_t, there is a list of all currently valid virtual | |
| 78 | * mappings of that page. An entry is a pv_entry_t, the list is pv_table. | |
| 79 | */ | |
| 80 | typedef struct pv_entry { | |
| 81 | struct pv_entry *pv_next; /* next pv_entry */ | |
| 82 | struct pmap *pv_pmap; /* pmap where mapping lies */ | |
| 83 | vm_offset_t pv_va; /* virtual address for mapping */ | |
| 84 | struct ste *pv_ptste; /* non-zero if VA maps a PT page */ | |
| 85 | struct pmap *pv_ptpmap; /* if pv_ptste, pmap for PT page */ | |
| 86 | int pv_flags; /* flags */ | |
| 87 | } *pv_entry_t; | |
| 88 | ||
| 89 | #define PV_CI 0x01 /* all entries must be cache inhibited */ | |
| 90 | #define PV_PTPAGE 0x02 /* entry maps a page table page */ | |
| 91 | ||
| 92 | #ifdef KERNEL | |
| 93 | pv_entry_t pv_table; /* array of entries, one per page */ | |
| 94 | ||
| 95 | #define pa_index(pa) atop(pa - vm_first_phys) | |
| 96 | #define pa_to_pvh(pa) (&pv_table[pa_index(pa)]) | |
| 97 | ||
| 98 | #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) | |
| 99 | ||
| 100 | extern struct pte *Sysmap; | |
| 101 | extern char *vmmap; /* map for mem, dumps, etc. */ | |
| 102 | ||
| 103 | /* | |
| 104 | * definitions LUNA IO space mapping | |
| 105 | */ | |
| 106 | struct physmap { | |
| 107 | int pm_phys; | |
| 108 | int pm_size; | |
| 109 | int pm_cache; | |
| 110 | } ; | |
| 111 | ||
| 112 | #endif | |
| 113 | ||
| 114 | #endif _PMAP_MACHINE_ |