1 /* 2 * Copyright (c) 1987 Carnegie-Mellon University 3 * Copyright (c) 1992 OMRON Corporation. 4 * Copyright (c) 1991, 1992, 1993 5 * The Regents of the University of California. 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 * from: hp300/include/pmap.h 7.11 (Berkeley) 12/27/92 14 * 15 * @(#)pmap.h 8.1 (Berkeley) 06/10/93 16 */ 17 18 #ifndef _PMAP_MACHINE_ 19 #define _PMAP_MACHINE_ 20 21 #define LUNA_PAGE_SIZE NBPG 22 #if defined(LUNA2) 23 #define LUNA_SEG_SIZE (mmutype == MMU_68040 ? 0x40000 : NBSEG) 24 #else 25 #define LUNA_SEG_SIZE NBSEG 26 #endif 27 28 #define luna_trunc_seg(x) (((unsigned)(x)) & ~(LUNA_SEG_SIZE-1)) 29 #define luna_round_seg(x) luna_trunc_seg((unsigned)(x) + LUNA_SEG_SIZE-1) 30 31 /* 32 * Pmap stuff 33 */ 34 struct pmap { 35 struct pte *pm_ptab; /* KVA of page table */ 36 struct ste *pm_stab; /* KVA of segment table */ 37 int pm_stchanged; /* ST changed */ 38 int pm_stfree; /* 040: free lev2 blocks */ 39 struct ste *pm_stpa; /* 040: ST phys addr */ 40 short pm_sref; /* segment table ref count */ 41 short pm_count; /* pmap reference count */ 42 simple_lock_data_t pm_lock; /* lock on pmap */ 43 struct pmap_statistics pm_stats; /* pmap statistics */ 44 long pm_ptpages; /* more stats: PT pages */ 45 }; 46 47 typedef struct pmap *pmap_t; 48 49 extern struct pmap kernel_pmap_store; 50 51 #define kernel_pmap (&kernel_pmap_store) 52 #define active_pmap(pm) \ 53 ((pm) == kernel_pmap || (pm) == curproc->p_vmspace->vm_map.pmap) 54 55 /* 56 * On the 040 we keep track of which level 2 blocks are already in use 57 * with the pm_stfree mask. Bits are arranged from LSB (block 0) to MSB 58 * (block 31). For convenience, the level 1 table is considered to be 59 * block 0. 60 * 61 * MAX[KU]L2SIZE control how many pages of level 2 descriptors are allowed. 62 * for the kernel and users. 8 implies only the initial "segment table" 63 * page is used. WARNING: don't change MAXUL2SIZE unless you can allocate 64 * physically contiguous pages for the ST in pmap.c! 65 */ 66 #define MAXKL2SIZE 16 67 #define MAXUL2SIZE 8 68 #define l2tobm(n) (1 << (n)) 69 #define bmtol2(n) (ffs(n) - 1) 70 71 /* 72 * Macros for speed 73 */ 74 #define PMAP_ACTIVATE(pmapp, pcbp, iscurproc) \ 75 if ((pmapp) != NULL && (pmapp)->pm_stchanged) { \ 76 (pcbp)->pcb_ustp = luna_btop((vm_offset_t)(pmapp)->pm_stpa); \ 77 if (iscurproc) \ 78 loadustp((pcbp)->pcb_ustp); \ 79 (pmapp)->pm_stchanged = FALSE; \ 80 } 81 #define PMAP_DEACTIVATE(pmapp, pcbp) 82 83 /* 84 * For each vm_page_t, there is a list of all currently valid virtual 85 * mappings of that page. An entry is a pv_entry_t, the list is pv_table. 86 */ 87 typedef struct pv_entry { 88 struct pv_entry *pv_next; /* next pv_entry */ 89 struct pmap *pv_pmap; /* pmap where mapping lies */ 90 vm_offset_t pv_va; /* virtual address for mapping */ 91 struct ste *pv_ptste; /* non-zero if VA maps a PT page */ 92 struct pmap *pv_ptpmap; /* if pv_ptste, pmap for PT page */ 93 int pv_flags; /* flags */ 94 } *pv_entry_t; 95 96 #define PV_CI 0x01 /* header: all entries are cache inhibited */ 97 #define PV_PTPAGE 0x02 /* header: entry maps a page table page */ 98 99 #ifdef KERNEL 100 101 pv_entry_t pv_table; /* array of entries, one per page */ 102 103 #define pa_index(pa) atop(pa - vm_first_phys) 104 #define pa_to_pvh(pa) (&pv_table[pa_index(pa)]) 105 106 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) 107 #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count) 108 109 extern struct pte *Sysmap; 110 extern char *vmmap; /* map for mem, dumps, etc. */ 111 112 /* 113 * definitions LUNA IO space mapping 114 */ 115 struct physmap { 116 int pm_phys; 117 int pm_size; 118 int pm_cache; 119 } ; 120 121 #endif 122 123 #endif _PMAP_MACHINE_ 124