137 lines
4.1 KiB
C
137 lines
4.1 KiB
C
/*-
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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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* $NetBSD: pmap.h,v 1.17 2000/03/30 16:18:24 jdolecek Exp $
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* $FreeBSD$
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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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struct pv_entry {
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struct pv_entry *pv_next; /* Linked list of mappings */
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int pv_idx; /* Index into ptable */
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vm_offset_t pv_va; /* virtual address of mapping */
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};
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struct md_page {
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int pv_list_count;
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int pv_flags;
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TAILQ_HEAD(,pv_entry) pv_list;
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};
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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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typedef struct pv_entry *pv_entry_t;
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#ifdef _KERNEL
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#define pmap_clear_modify(pg) (ptemodify((pg), PTE_CHG, 0))
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#define pmap_clear_reference(pg) (ptemodify((pg), PTE_REF, 0))
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#define pmap_is_modified(pg) (ptebits((pg), PTE_CHG))
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#define pmap_is_referenced(pg) (ptebits((pg), 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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extern pmap_t kernel_pmap;
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extern vm_offset_t avail_end;
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extern vm_offset_t avail_start;
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extern vm_offset_t phys_avail[];
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extern vm_offset_t virtual_avail;
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extern vm_offset_t virtual_end;
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void pmap_bootstrap __P((void));
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void *pmap_mapdev __P((vm_offset_t, vm_size_t));
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void pmap_setavailmem __P((u_int kernelstart, u_int kernelend));
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vm_offset_t pmap_steal_memory __P((vm_size_t));
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boolean_t ptemodify __P((struct vm_page *, u_int, u_int));
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int ptebits __P((struct vm_page *, int));
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#if 0
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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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#endif
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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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#define vtophys(va) pmap_kextract(((vm_offset_t) (va)))
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extern pte_t PTmap[];
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#define vtopte(x) (PTmap + powerpc_btop(x))
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static __inline vm_offset_t
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pmap_kextract(vm_offset_t va)
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{
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/* XXX: coming soon... */
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return (0);
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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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