111 lines
3.5 KiB
C
111 lines
3.5 KiB
C
/* $NetBSD: pmap.h,v 1.13 1999/06/17 19:23:21 thorpej Exp $ */
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/*-
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* Copyright (C) 1995, 1996 Wolfgang Solfrank.
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* Copyright (C) 1995, 1996 TooLs GmbH.
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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 by TooLs GmbH.
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* 4. The name of TooLs GmbH 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 TOOLS GMBH ``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 TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _MACHINE_PMAP_H_
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#define _MACHINE_PMAP_H_
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#include <machine/pte.h>
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/*
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* Segment registers
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*/
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#ifndef _LOCORE
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typedef u_int sr_t;
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#endif /* _LOCORE */
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#define SR_TYPE 0x80000000
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#define SR_SUKEY 0x40000000
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#define SR_PRKEY 0x20000000
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#define SR_VSID 0x00ffffff
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#ifndef _LOCORE
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/*
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* Pmap stuff
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*/
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struct pmap {
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sr_t pm_sr[16]; /* segments used in this pmap */
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int pm_refs; /* ref count */
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struct pmap_statistics pm_stats; /* pmap statistics */
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};
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typedef struct pmap *pmap_t;
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#ifdef _KERNEL
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extern struct pmap kernel_pmap_;
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#define pmap_kernel() (&kernel_pmap_)
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#define pmap_clear_modify(pa) (ptemodify((pa), PTE_CHG, 0))
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#define pmap_clear_reference(pa) (ptemodify((pa), PTE_REF, 0))
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#define pmap_is_modified(pa) (ptebits((pa), PTE_CHG))
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#define pmap_is_referenced(pa) (ptebits((pa), PTE_REF))
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#define pmap_unwire(pm, va)
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#define pmap_phys_address(x) (x)
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#define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
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void pmap_bootstrap __P((u_int kernelstart, u_int kernelend));
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paddr_t pmap_extract __P((struct pmap *, vaddr_t));
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void ptemodify __P((paddr_t, u_int, u_int));
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int ptebits __P((paddr_t, int));
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#define PMAP_NEED_PROCWR
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void pmap_procwr __P((struct proc *, vaddr_t, size_t));
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/*
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* Alternate mapping hooks for pool pages. Avoids thrashing the TLB.
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*
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* Note: This won't work if we have more memory than can be direct-mapped
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* VA==PA all at once. But pmap_copy_page() and pmap_zero_page() will have
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* this problem, too.
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*/
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#define PMAP_MAP_POOLPAGE(pa) (pa)
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#define PMAP_UNMAP_POOLPAGE(pa) (pa)
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static __inline paddr_t
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vtophys(va)
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vaddr_t va;
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{
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paddr_t pa;
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/* XXX should check battable */
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if ((pa = pmap_extract(pmap_kernel(), va)) != 0)
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return pa;
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return va;
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}
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#endif /* _KERNEL */
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#endif /* _LOCORE */
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#endif /* _MACHINE_PMAP_H_ */
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