/* $OpenBSD: pmap.h,v 1.12 2001/12/05 00:11:51 millert Exp $ */ /* $NetBSD: pmap.h,v 1.18 1997/01/27 19:41:06 gwr Exp $ */ /*- * Copyright (c) 1996 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Adam Glass and Gordon W. Ross. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef _MACHINE_PMAP_ #define _MACHINE_PMAP_ /* * Physical map structures exported to the VM code. */ struct pmap { int pm_refcount; /* pmap reference count */ struct simplelock pm_lock; /* lock on pmap */ struct pmap_statistics pm_stats; /* pmap statistics */ int pm_version; int pm_ctxnum; unsigned char *pm_segmap; }; typedef struct pmap *pmap_t; #ifdef _KERNEL extern struct pmap kernel_pmap_store; #define pmap_kernel() (&kernel_pmap_store) /* This is called from locore.s:cpu_switch() */ void pmap_switch __P((pmap_t pmap)); /* This lets us have some say in choosing VA locations. */ extern void pmap_prefer(vm_offset_t, vm_offset_t *); #define PMAP_PREFER(fo, ap) pmap_prefer((fo), (ap)) /* This needs to be a macro to get code in kern_sysctl.c */ extern segsz_t pmap_resident_pages(pmap_t); #define pmap_resident_count(pmap) pmap_resident_pages(pmap) #define pmap_update(pmap) /* nothing (yet) */ /* * Since PTEs also contain type bits, we have to have some way * to tell pmap_enter `this is an IO page' or `this is not to * be cached'. Since physical addresses are always aligned, we * can do this with the low order bits. * * The values below must agree with pte.h such that: * (PMAP_OBIO << PG_MOD_SHIFT) == PGT_OBIO */ #define PMAP_OBIO 0x04 /* tells pmap_enter to use PG_OBIO */ #define PMAP_VME16 0x08 /* etc */ #define PMAP_VME32 0x0C /* etc */ #define PMAP_NC 0x10 /* tells pmap_enter to set PG_NC */ #define PMAP_SPEC 0x1C /* mask to get all above. */ #endif /* _KERNEL */ #endif /* _MACHINE_PMAP_ */