112 lines
3.8 KiB
C
112 lines
3.8 KiB
C
/* $NetBSD: pte.h,v 1.16 2000/07/19 18:15:01 matt Exp $ */
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/*
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* Copyright (c) 1994 Ludd, University of Lule}, Sweden.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed at Ludd, University of Lule}.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _VAX_PTE_H_
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#define _VAX_PTE_H_
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#ifndef _LOCORE
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/*
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* VAX page table entries
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*/
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struct pte {
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unsigned int pg_pfn:21; /* Page Frame Number or 0 */
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unsigned int pg_u:1; /* Uniform bit, does WHAT?? XXX */
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unsigned int pg_w:1; /* Wired bit */
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unsigned int pg_sref:1; /* Help for ref simulation */
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unsigned int pg_ref:1; /* Simulated reference bit */
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unsigned int pg_z:1; /* Zero DIGITAL = 0 */
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unsigned int pg_m:1; /* Modify DIGITAL */
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unsigned int pg_prot:4; /* reserved at zero */
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unsigned int pg_v:1; /* valid bit */
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};
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typedef struct pte pt_entry_t; /* Mach page table entry */
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#endif _LOCORE
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#define PT_ENTRY_NULL ((pt_entry_t *) 0)
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#define PG_V 0x80000000
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#define PG_NV 0x00000000
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#define PG_PROT 0x78000000
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#define PG_RW 0x20000000
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#define PG_KW 0x10000000
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#define PG_KR 0x18000000
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#define PG_URKW 0x70000000
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#define PG_RO 0x78000000
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#define PG_NONE 0x00000000
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#define PG_M 0x04000000
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#define PG_REF 0x01000000
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#define PG_SREF 0x00800000
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#define PG_W 0x00400000
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#define PG_U 0x00200000
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#define PG_FRAME 0x001fffff
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#define PG_PFNUM(x) (((unsigned long)(x) & 0x3ffffe00) >> VAX_PGSHIFT)
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#ifndef _LOCORE
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extern pt_entry_t *Sysmap;
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/*
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* Kernel virtual address to page table entry and to physical address.
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*/
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#endif
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#ifdef __ELF__
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#define VAX_SYSMAP "Sysmap"
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#else
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#define VAX_SYSMAP "_Sysmap"
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#endif
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#ifdef __GNUC__
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#define kvtopte(va) ({ \
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struct pte *r; \
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asm("extzv $9,$21,%1,%0;moval *" VAX_SYSMAP "[%0],%0" : "=r"(r) : "g"(va)); \
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r; \
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})
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#define kvtophys(va) ({ \
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long r; \
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asm("extzv $9,$21,%1,%0;ashl $9,*" VAX_SYSMAP "[%0],%0;insv %1,$0,$9,%0" \
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: "=&r"(r) : "g"(va) : "cc"); \
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r; \
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})
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#else /* __GNUC__ */
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#define kvtophys(va) \
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(((kvtopte(va))->pg_pfn << VAX_PGSHIFT) | ((int)(va) & VAX_PGOFSET))
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#define kvtopte(va) (&Sysmap[PG_PFNUM(va)])
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#endif /* __GNUC__ */
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#define uvtopte(va, pcb) \
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(((unsigned)va < 0x40000000) ? \
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&((pcb->P0BR)[PG_PFNUM(va)]) : \
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&((pcb->P1BR)[PG_PFNUM(va)]))
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#endif
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