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pmap.h revision 1.10 
      1  1.10     cgd /*	$NetBSD: pmap.h,v 1.10 1994/10/26 02:06:25 cgd Exp $	*/
      2  1.10     cgd 
      3   1.1      mw /*
      4   1.1      mw  * Copyright (c) 1987 Carnegie-Mellon University
      5   1.1      mw  * Copyright (c) 1991 Regents of the University of California.
      6   1.1      mw  * All rights reserved.
      7   1.1      mw  *
      8   1.1      mw  * This code is derived from software contributed to Berkeley by
      9   1.1      mw  * the Systems Programming Group of the University of Utah Computer
     10   1.1      mw  * Science Department.
     11   1.1      mw  *
     12   1.1      mw  * Redistribution and use in source and binary forms, with or without
     13   1.1      mw  * modification, are permitted provided that the following conditions
     14   1.1      mw  * are met:
     15   1.1      mw  * 1. Redistributions of source code must retain the above copyright
     16   1.1      mw  *    notice, this list of conditions and the following disclaimer.
     17   1.1      mw  * 2. Redistributions in binary form must reproduce the above copyright
     18   1.1      mw  *    notice, this list of conditions and the following disclaimer in the
     19   1.1      mw  *    documentation and/or other materials provided with the distribution.
     20   1.1      mw  * 3. All advertising materials mentioning features or use of this software
     21   1.1      mw  *    must display the following acknowledgement:
     22   1.1      mw  *	This product includes software developed by the University of
     23   1.1      mw  *	California, Berkeley and its contributors.
     24   1.1      mw  * 4. Neither the name of the University nor the names of its contributors
     25   1.1      mw  *    may be used to endorse or promote products derived from this software
     26   1.1      mw  *    without specific prior written permission.
     27   1.1      mw  *
     28   1.1      mw  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     29   1.1      mw  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     30   1.1      mw  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     31   1.1      mw  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     32   1.1      mw  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     33   1.1      mw  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     34   1.1      mw  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     35   1.1      mw  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     36   1.1      mw  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     37   1.1      mw  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     38   1.1      mw  * SUCH DAMAGE.
     39   1.1      mw  *
     40   1.3      mw  *	@(#)pmap.h	7.6 (Berkeley) 5/10/91
     41   1.1      mw  */
     42   1.7  chopps #ifndef	_MACHINE_PMAP_H_
     43   1.7  chopps #define	_MACHINE_PMAP_H_
     44   1.1      mw 
     45   1.1      mw /*
     46   1.3      mw  * Pmap stuff (in anticipation of '40 support)
     47   1.1      mw  */
     48   1.1      mw struct pmap {
     49   1.9  chopps 	u_int 	*pm_ptab;	/* KVA of page table */
     50   1.9  chopps 	u_int	*pm_stab;	/* KVA of segment table */
     51   1.9  chopps 	u_int	*pm_rtab;	/* KVA of 68040 root table */
     52   1.9  chopps 	int	pm_stchanged;	/* ST changed */
     53   1.9  chopps 	short	pm_sref;	/* segment table ref count */
     54   1.9  chopps 	short	pm_count;	/* pmap reference count */
     55   1.9  chopps 	long	pm_ptpages;	/* more stats: PT pages */
     56   1.1      mw 	simple_lock_data_t	pm_lock;	/* lock on pmap */
     57   1.1      mw 	struct pmap_statistics	pm_stats;	/* pmap statistics */
     58   1.1      mw };
     59   1.1      mw 
     60   1.9  chopps typedef struct pmap *pmap_t;
     61   1.9  chopps extern pmap_t kernel_pmap;
     62   1.1      mw 
     63   1.1      mw /*
     64   1.1      mw  * Macros for speed
     65   1.1      mw  */
     66   1.1      mw #define PMAP_ACTIVATE(pmapp, pcbp, iscurproc) \
     67   1.1      mw 	if ((pmapp) != NULL && (pmapp)->pm_stchanged) { \
     68   1.1      mw 		(pcbp)->pcb_ustp = \
     69   1.4      mw 		    amiga_btop(pmap_extract(kernel_pmap, \
     70   1.8  chopps 		    cpu040 ? (vm_offset_t)(pmapp)->pm_rtab : \
     71   1.8  chopps 		    (vm_offset_t)(pmapp)->pm_stab)); \
     72   1.1      mw 		if (iscurproc) \
     73   1.1      mw 			loadustp((pcbp)->pcb_ustp); \
     74   1.1      mw 		(pmapp)->pm_stchanged = FALSE; \
     75   1.1      mw 	}
     76   1.1      mw #define PMAP_DEACTIVATE(pmapp, pcbp)
     77   1.1      mw 
     78   1.1      mw /*
     79   1.1      mw  * For each vm_page_t, there is a list of all currently valid virtual
     80   1.1      mw  * mappings of that page.  An entry is a pv_entry_t, the list is pv_table.
     81   1.1      mw  */
     82   1.1      mw typedef struct pv_entry {
     83   1.1      mw 	struct pv_entry	*pv_next;	/* next pv_entry */
     84   1.1      mw 	struct pmap	*pv_pmap;	/* pmap where mapping lies */
     85   1.1      mw 	vm_offset_t	pv_va;		/* virtual address for mapping */
     86   1.9  chopps 	u_int		*pv_ptste;	/* non-zero if VA maps a PT page */
     87   1.1      mw 	struct pmap	*pv_ptpmap;	/* if pv_ptste, pmap for PT page */
     88   1.1      mw 	int		pv_flags;	/* flags */
     89   1.1      mw } *pv_entry_t;
     90   1.1      mw 
     91   1.1      mw #define	PV_CI		0x01	/* all entries must be cache inhibited */
     92   1.1      mw #define PV_PTPAGE	0x02	/* entry maps a page table page */
     93   1.1      mw 
     94   1.1      mw #ifdef	KERNEL
     95   1.9  chopps pv_entry_t	pv_table;	/* array of entries, one per page */
     96   1.9  chopps u_int		*Sysmap;
     97   1.9  chopps char		*vmmap;		/* map for mem, dumps, etc. */
     98   1.1      mw 
     99   1.1      mw #define pa_index(pa)		atop(pa - vm_first_phys)
    100   1.1      mw #define pa_to_pvh(pa)		(&pv_table[pa_index(pa)])
    101   1.1      mw #define	pmap_resident_count(pmap)	((pmap)->pm_stats.resident_count)
    102   1.1      mw #endif	KERNEL
    103   1.1      mw 
    104   1.7  chopps #endif	/* !_MACHINE_PMAP_H_ */
    105