1*53975Sfujita /* 2*53975Sfujita * Copyright (c) 1987 Carnegie-Mellon University 3*53975Sfujita * Copyright (c) 1992 OMRON Corporation. 4*53975Sfujita * Copyright (c) 1991, 1992 Regents of the University of California. 5*53975Sfujita * All rights reserved. 6*53975Sfujita * 7*53975Sfujita * This code is derived from software contributed to Berkeley by 8*53975Sfujita * the Systems Programming Group of the University of Utah Computer 9*53975Sfujita * Science Department. 10*53975Sfujita * 11*53975Sfujita * %sccs.include.redist.c% 12*53975Sfujita * 13*53975Sfujita * OMRON: $Id: pmap.h,v 1.2 92/06/14 06:29:43 moti Exp $ 14*53975Sfujita * 15*53975Sfujita * @(#)pmap.h 7.1 (Berkeley) 06/15/92 16*53975Sfujita */ 17*53975Sfujita 18*53975Sfujita #ifndef _PMAP_MACHINE_ 19*53975Sfujita #define _PMAP_MACHINE_ 20*53975Sfujita 21*53975Sfujita #define LUNA_PAGE_SIZE NBPG 22*53975Sfujita #define LUNA_SEG_SIZE NBSEG 23*53975Sfujita 24*53975Sfujita #define luna_trunc_seg(x) (((unsigned)(x)) & ~(LUNA_SEG_SIZE-1)) 25*53975Sfujita #define luna_round_seg(x) luna_trunc_seg((unsigned)(x) + LUNA_SEG_SIZE-1) 26*53975Sfujita 27*53975Sfujita /* 28*53975Sfujita * Pmap stuff 29*53975Sfujita */ 30*53975Sfujita struct pmap { 31*53975Sfujita struct pte *pm_ptab; /* KVA of page table */ 32*53975Sfujita struct ste *pm_stab; /* KVA of segment table */ 33*53975Sfujita int pm_stchanged; /* ST changed */ 34*53975Sfujita int pm_stfree; /* 040: free lev2 blocks */ 35*53975Sfujita struct ste *pm_stpa; /* 040: ST phys addr */ 36*53975Sfujita short pm_sref; /* segment table ref count */ 37*53975Sfujita short pm_count; /* pmap reference count */ 38*53975Sfujita simple_lock_data_t pm_lock; /* lock on pmap */ 39*53975Sfujita struct pmap_statistics pm_stats; /* pmap statistics */ 40*53975Sfujita long pm_ptpages; /* more stats: PT pages */ 41*53975Sfujita }; 42*53975Sfujita 43*53975Sfujita typedef struct pmap *pmap_t; 44*53975Sfujita 45*53975Sfujita extern struct pmap kernel_pmap_store; 46*53975Sfujita #define kernel_pmap (&kernel_pmap_store) 47*53975Sfujita 48*53975Sfujita /* 49*53975Sfujita * On the 040 we keep track of which level 2 blocks are already in use 50*53975Sfujita * with the pm_stfree mask. Bits are arranged from LSB (block 0) to MSB 51*53975Sfujita * (block 31). For convenience, the level 1 table is considered to be 52*53975Sfujita * block 0. 53*53975Sfujita * 54*53975Sfujita * MAX[KU]L2SIZE control how many pages of level 2 descriptors are allowed. 55*53975Sfujita * for the kernel and users. 8 implies only the initial "segment table" 56*53975Sfujita * page is used. WARNING: don't change MAXUL2SIZE unless you can allocate 57*53975Sfujita * physically contiguous pages for the ST in pmap.c! 58*53975Sfujita */ 59*53975Sfujita #define MAXKL2SIZE 16 60*53975Sfujita #define MAXUL2SIZE 8 61*53975Sfujita #define l2tobm(n) (1 << (n)) 62*53975Sfujita #define bmtol2(n) (ffs(n) - 1) 63*53975Sfujita 64*53975Sfujita /* 65*53975Sfujita * Macros for speed 66*53975Sfujita */ 67*53975Sfujita #define PMAP_ACTIVATE(pmapp, pcbp, iscurproc) \ 68*53975Sfujita if ((pmapp) != NULL && (pmapp)->pm_stchanged) { \ 69*53975Sfujita (pcbp)->pcb_ustp = \ 70*53975Sfujita luna_btop(pmap_extract(kernel_pmap, \ 71*53975Sfujita ((vm_offset_t)(pmapp)->pm_stab))); \ 72*53975Sfujita if (iscurproc) \ 73*53975Sfujita loadustp((pcbp)->pcb_ustp); \ 74*53975Sfujita (pmapp)->pm_stchanged = FALSE; \ 75*53975Sfujita } 76*53975Sfujita #define PMAP_DEACTIVATE(pmapp, pcbp) 77*53975Sfujita 78*53975Sfujita /* 79*53975Sfujita * For each vm_page_t, there is a list of all currently valid virtual 80*53975Sfujita * mappings of that page. An entry is a pv_entry_t, the list is pv_table. 81*53975Sfujita */ 82*53975Sfujita typedef struct pv_entry { 83*53975Sfujita struct pv_entry *pv_next; /* next pv_entry */ 84*53975Sfujita struct pmap *pv_pmap; /* pmap where mapping lies */ 85*53975Sfujita vm_offset_t pv_va; /* virtual address for mapping */ 86*53975Sfujita struct ste *pv_ptste; /* non-zero if VA maps a PT page */ 87*53975Sfujita struct pmap *pv_ptpmap; /* if pv_ptste, pmap for PT page */ 88*53975Sfujita int pv_flags; /* flags */ 89*53975Sfujita } *pv_entry_t; 90*53975Sfujita 91*53975Sfujita #define PV_CI 0x01 /* all entries must be cache inhibited */ 92*53975Sfujita #define PV_PTPAGE 0x02 /* entry maps a page table page */ 93*53975Sfujita 94*53975Sfujita #ifdef KERNEL 95*53975Sfujita pv_entry_t pv_table; /* array of entries, one per page */ 96*53975Sfujita 97*53975Sfujita #define pa_index(pa) atop(pa - vm_first_phys) 98*53975Sfujita #define pa_to_pvh(pa) (&pv_table[pa_index(pa)]) 99*53975Sfujita 100*53975Sfujita #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) 101*53975Sfujita 102*53975Sfujita extern struct pte *Sysmap; 103*53975Sfujita extern char *vmmap; /* map for mem, dumps, etc. */ 104*53975Sfujita 105*53975Sfujita /* 106*53975Sfujita * definitions LUNA IO space mapping 107*53975Sfujita */ 108*53975Sfujita struct physmap { 109*53975Sfujita int pm_phys; 110*53975Sfujita int pm_size; 111*53975Sfujita int pm_cache; 112*53975Sfujita } ; 113*53975Sfujita 114*53975Sfujita #endif 115*53975Sfujita 116*53975Sfujita #endif _PMAP_MACHINE_ 117