Home | History | Annotate | Line # | Download | only in include
pte.h revision 1.19 
      1 /*	$NetBSD: pte.h,v 1.19 2001/08/31 04:44:57 simonb Exp $	  */
      2 
      3 /*
      4  * Copyright (c) 1994 Ludd, University of Lule}, Sweden.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *     This product includes software developed at Ludd, University of Lule}.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #ifndef _VAX_PTE_H_
     34 #define _VAX_PTE_H_
     35 
     36 #ifndef _LOCORE
     37 /*
     38  * VAX page table entries
     39  */
     40 struct pte {
     41 	unsigned int	pg_pfn:21;	/* Page Frame Number or 0 */
     42 	unsigned int	pg_illegal:2;	/* Don't use this bits */
     43 	unsigned int	pg_sref:1;	/* Help for ref simulation */
     44 	unsigned int	pg_w:1;		/* Wired bit */
     45 	unsigned int	pg_z:1;		/* Zero DIGITAL = 0 */
     46 	unsigned int	pg_m:1;		/* Modify DIGITAL */
     47 	unsigned int	pg_prot:4;	/* reserved at zero */
     48 	unsigned int	pg_v:1;		/* valid bit */
     49 };
     50 
     51 
     52 typedef struct pte	pt_entry_t;	/* Mach page table entry */
     53 
     54 #endif /* _LOCORE */
     55 
     56 #define PT_ENTRY_NULL	((pt_entry_t *) 0)
     57 
     58 #define PG_V		0x80000000
     59 #define PG_NV		0x00000000
     60 #define PG_PROT		0x78000000
     61 #define PG_RW		0x20000000
     62 #define PG_KW		0x10000000
     63 #define PG_KR		0x18000000
     64 #define PG_URKW		0x70000000
     65 #define PG_RO		0x78000000
     66 #define PG_NONE		0x00000000
     67 #define PG_M		0x04000000
     68 #define PG_W		0x01000000
     69 #define PG_SREF		0x00800000
     70 #define PG_ILLEGAL	0x00600000
     71 #define PG_FRAME	0x001fffff
     72 #define PG_PFNUM(x)	(((unsigned long)(x) & 0x3ffffe00) >> VAX_PGSHIFT)
     73 
     74 #ifndef _LOCORE
     75 extern pt_entry_t *Sysmap;
     76 /*
     77  * Kernel virtual address to page table entry and to physical address.
     78  */
     79 #endif
     80 
     81 #ifdef __ELF__
     82 #define VAX_SYSMAP	"Sysmap"
     83 #else
     84 #define VAX_SYSMAP	"_Sysmap"
     85 #endif
     86 
     87 #ifdef __GNUC__
     88 #define kvtopte(va) ({ \
     89 	struct pte *r; \
     90 	asm("extzv $9,$21,%1,%0;moval *" VAX_SYSMAP "[%0],%0" : "=r"(r) : "g"(va)); \
     91 	r; \
     92 })
     93 #define kvtophys(va) ({ \
     94 	paddr_t r; \
     95 	asm("extzv $9,$21,%1,%0;ashl $9,*" VAX_SYSMAP "[%0],%0;insv %1,$0,$9,%0" \
     96 	    : "=&r"(r) : "g"(va) : "cc"); \
     97 	r; \
     98 })
     99 #else /* __GNUC__ */
    100 #define kvtophys(va) \
    101 	(((kvtopte(va))->pg_pfn << VAX_PGSHIFT) | ((paddr_t)(va) & VAX_PGOFSET))
    102 #define kvtopte(va) (&Sysmap[PG_PFNUM(va)])
    103 #endif /* __GNUC__ */
    104 #define uvtopte(va, pcb) \
    105 	(((vaddr_t)va < 0x40000000) ? \
    106 	&(((pcb)->P0BR)[PG_PFNUM(va)]) : \
    107 	&(((pcb)->P1BR)[PG_PFNUM(va)]))
    108 
    109 #endif
    110