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Annotation of Net2/arch/hp300/include/pmap.h, revision 1.1.1.1

1.1       root        1: /* 
                      2:  * Copyright (c) 1987 Carnegie-Mellon University
                      3:  * Copyright (c) 1991 Regents of the University of California.
                      4:  * All rights reserved.
                      5:  *
                      6:  * This code is derived from software contributed to Berkeley by
                      7:  * the Systems Programming Group of the University of Utah Computer
                      8:  * Science Department.
                      9:  *
                     10:  * Redistribution and use in source and binary forms, with or without
                     11:  * modification, are permitted provided that the following conditions
                     12:  * are met:
                     13:  * 1. Redistributions of source code must retain the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer.
                     15:  * 2. Redistributions in binary form must reproduce the above copyright
                     16:  *    notice, this list of conditions and the following disclaimer in the
                     17:  *    documentation and/or other materials provided with the distribution.
                     18:  * 3. All advertising materials mentioning features or use of this software
                     19:  *    must display the following acknowledgement:
                     20:  *     This product includes software developed by the University of
                     21:  *     California, Berkeley and its contributors.
                     22:  * 4. Neither the name of the University nor the names of its contributors
                     23:  *    may be used to endorse or promote products derived from this software
                     24:  *    without specific prior written permission.
                     25:  *
                     26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     36:  * SUCH DAMAGE.
                     37:  *
                     38:  *     @(#)pmap.h      7.6 (Berkeley) 5/10/91
                     39:  */
                     40: 
                     41: #ifndef        _PMAP_MACHINE_
                     42: #define        _PMAP_MACHINE_
                     43: 
                     44: #define HP_PAGE_SIZE   NBPG
                     45: #define HP_SEG_SIZE    NBSEG
                     46: 
                     47: /*
                     48:  * Pmap stuff
                     49:  */
                     50: struct pmap {
                     51:        struct pte              *pm_ptab;       /* KVA of page table */
                     52:        struct ste              *pm_stab;       /* KVA of segment table */
                     53:        int                     pm_stchanged;   /* ST changed */
                     54:        short                   pm_sref;        /* segment table ref count */
                     55:        short                   pm_count;       /* pmap reference count */
                     56:        simple_lock_data_t      pm_lock;        /* lock on pmap */
                     57:        struct pmap_statistics  pm_stats;       /* pmap statistics */
                     58:        long                    pm_ptpages;     /* more stats: PT pages */
                     59: };
                     60: 
                     61: typedef struct pmap    *pmap_t;
                     62: 
                     63: extern pmap_t          kernel_pmap;
                     64: 
                     65: /*
                     66:  * Macros for speed
                     67:  */
                     68: #define PMAP_ACTIVATE(pmapp, pcbp, iscurproc) \
                     69:        if ((pmapp) != NULL && (pmapp)->pm_stchanged) { \
                     70:                (pcbp)->pcb_ustp = \
                     71:                    hp300_btop(pmap_extract(kernel_pmap, (pmapp)->pm_stab)); \
                     72:                if (iscurproc) \
                     73:                        loadustp((pcbp)->pcb_ustp); \
                     74:                (pmapp)->pm_stchanged = FALSE; \
                     75:        }
                     76: #define PMAP_DEACTIVATE(pmapp, pcbp)
                     77: 
                     78: /*
                     79:  * For each vm_page_t, there is a list of all currently valid virtual
                     80:  * mappings of that page.  An entry is a pv_entry_t, the list is pv_table.
                     81:  */
                     82: typedef struct pv_entry {
                     83:        struct pv_entry *pv_next;       /* next pv_entry */
                     84:        struct pmap     *pv_pmap;       /* pmap where mapping lies */
                     85:        vm_offset_t     pv_va;          /* virtual address for mapping */
                     86:        struct ste      *pv_ptste;      /* non-zero if VA maps a PT page */
                     87:        struct pmap     *pv_ptpmap;     /* if pv_ptste, pmap for PT page */
                     88:        int             pv_flags;       /* flags */
                     89: } *pv_entry_t;
                     90: 
                     91: #define        PV_CI           0x01    /* all entries must be cache inhibited */
                     92: #define PV_PTPAGE      0x02    /* entry maps a page table page */
                     93: 
                     94: #ifdef KERNEL
                     95: pv_entry_t     pv_table;               /* array of entries, one per page */
                     96: 
                     97: #define pa_index(pa)           atop(pa - vm_first_phys)
                     98: #define pa_to_pvh(pa)          (&pv_table[pa_index(pa)])
                     99: 
                    100: #define        pmap_kernel()                   (kernel_pmap)
                    101: #define        pmap_resident_count(pmap)       ((pmap)->pm_stats.resident_count)
                    102: 
                    103: extern struct pte *Sysmap;
                    104: extern char *vmmap;                    /* map for mem, dumps, etc. */
                    105: #endif KERNEL
                    106: 
                    107: #endif _PMAP_MACHINE_

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