Home | History | Annotate | Line # | Download | only in include
pmap.h revision 1.1 
      1 /*	$NetBSD: pmap.h,v 1.1 1998/06/20 04:58:52 eeh Exp $	*/
      2 
      3 /*-
      4  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
      5  * Copyright (C) 1995, 1996 TooLs GmbH.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by TooLs GmbH.
     19  * 4. The name of TooLs GmbH may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
     23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #ifndef	_MACHINE_PMAP_H_
     35 #define	_MACHINE_PMAP_H_
     36 
     37 #ifndef _LOCORE
     38 #include <machine/pte.h>
     39 #include <sys/queue.h>
     40 #endif
     41 
     42 /*
     43  * This scheme uses 2-level page tables.
     44  *
     45  * While we're still in 32-bit mode we do the following:
     46  *
     47  *   offset:						13 bits
     48  * 1st level: 1024 64-bit TTEs in an 8K page for	10 bits
     49  * 2nd level: 512 32-bit pointers in the pmap for 	 9 bits
     50  *							-------
     51  * total:						32 bits
     52  *
     53  * In 64-bit mode this should be changed as follows
     54  *
     55  *   offset:						13 bits
     56  * 1st level: 1024 64-bit TTEs in an 8K page for	10 bits
     57  * 2nd level: 1024 64-bit pointers in an 8K page for 	10 bits
     58  * 3rd level: 128 64-bit pointers in the pmap for 	 7 bits
     59  *							-------
     60  * total:						40 bits
     61  */
     62 
     63 #define PTSZ	(NBPG/8)
     64 #define STSZ	(1<<9)
     65 
     66 #define PTSHIFT		(13)
     67 #define STSHIFT		(10+PTSHIFT)
     68 
     69 #define PTMASK		(PTSZ-1)
     70 #define STMASK		(STSZ-1)
     71 
     72 #ifndef _LOCORE
     73 
     74 /*
     75  * Support for big page sizes.  This maps the page size to the
     76  * page bits.
     77  */
     78 struct page_size_map {
     79 	u_int64_t mask;
     80 	u_int64_t code;
     81 #ifdef DEBUG
     82 	u_int64_t use;
     83 #endif
     84 };
     85 extern struct page_size_map page_size_map[];
     86 
     87 /*
     88  * Pmap stuff
     89  */
     90 
     91 #define va_to_seg(v)	(((v)>>STSHIFT)&STMASK)
     92 #define va_to_pte(v)	(((v)>>PTSHIFT)&PTMASK)
     93 
     94 /* typedef union sun4u_data ptab[PTSZ]; */
     95 
     96 struct pmap {
     97 	int pm_ctx;		/* Current context */
     98 	int pm_refs;		/* ref count */
     99 	vm_offset_t pm_physaddr; /* physical address of pm_segs */
    100 	union sun4u_data* pm_segs[STSZ];
    101 };
    102 
    103 /*
    104  * This comes from the PROM and is used to map prom entries.
    105  */
    106 struct prom_map {
    107 	u_int64_t	vstart;
    108 	u_int64_t	vsize;
    109 /*	struct sun4u_data	tte;*/
    110 	u_int64_t	tte;
    111 };
    112 
    113 #define PMAP_NC		1	/* Set the E bit in the page */
    114 /* If these bits are different in va's to the same PA then there is an aliasing in the d$ */
    115 #define VA_ALIAS_MASK   (1<<14)
    116 
    117 typedef	struct pmap *pmap_t;
    118 
    119 /*
    120  * Encode IO space for pmap_enter()
    121  *
    122  * Since sun4u machines don't have separate IO spaces, this is a noop.
    123  */
    124 #define PMAP_IOENC(io)	0
    125 
    126 #ifdef	_KERNEL
    127 extern struct pmap kernel_pmap_;
    128 #define	pmap_kernel()	(&kernel_pmap_)
    129 
    130 void pmap_clear_modify __P((vm_offset_t pa));
    131 void pmap_clear_reference __P((vm_offset_t pa));
    132 int pmap_is_modified __P((vm_offset_t pa));
    133 int pmap_is_referenced __P((vm_offset_t pa));
    134 int pmap_count_res __P((pmap_t pmap));
    135 /* int pmap_change_wiring __P((pmap_t pm, vm_offset_t va, boolean_t wired)); */
    136 #define pmap_resident_count(pm)		pmap_count_res((pm))
    137 #define	pmap_phys_address(x)		(x)
    138 
    139 void pmap_bootstrap __P((u_int kernelstart, u_int kernelend, u_int numctx));
    140 
    141 /* This needs to be implemented when we get a kernel map */
    142 void pmap_changeprot __P((pmap_t pmap, vm_offset_t start, vm_prot_t prot, int size));
    143 
    144 /* SPARC specific? */
    145 void		pmap_redzone __P((void));
    146 int             pmap_dumpsize __P((void));
    147 int             pmap_dumpmmu __P((int (*)__P((dev_t, daddr_t, caddr_t, size_t)),
    148                                  daddr_t));
    149 int		pmap_pa_exists __P((vm_offset_t));
    150 struct user;
    151 void		switchexit __P((vm_map_t, struct user *, int));
    152 
    153 /* SPARC64 specific */
    154 int	ctx_alloc __P((struct pmap*));
    155 void	ctx_free __P((struct pmap*));
    156 void	pmap_enter_phys __P((pmap_t, vm_offset_t, u_int64_t, u_int64_t, vm_prot_t, boolean_t));
    157 
    158 
    159 #endif	/* _KERNEL */
    160 #endif	/* _LOCORE */
    161 #endif	/* _MACHINE_PMAP_H_ */
    162