/* $NetBSD: uvm_map_i.h,v 1.21 2001/06/02 18:09:27 chs Exp $ */ /* * Copyright (c) 1997 Charles D. Cranor and Washington University. * Copyright (c) 1991, 1993, The Regents of the University of California. * * All rights reserved. * * This code is derived from software contributed to Berkeley by * The Mach Operating System project at Carnegie-Mellon University. * * 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 Charles D. Cranor, * Washington University, the University of California, Berkeley and * its contributors. * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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. * * @(#)vm_map.c 8.3 (Berkeley) 1/12/94 * from: Id: uvm_map_i.h,v 1.1.2.1 1997/08/14 19:10:50 chuck Exp * * * Copyright (c) 1987, 1990 Carnegie-Mellon University. * All rights reserved. * * Permission to use, copy, modify and distribute this software and * its documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. */ #ifndef _UVM_UVM_MAP_I_H_ #define _UVM_UVM_MAP_I_H_ /* * uvm_map_i.h */ /* * inline functions [maybe] */ #if defined(UVM_MAP_INLINE) || defined(UVM_MAP) /* * uvm_map_create: create map */ MAP_INLINE struct vm_map * uvm_map_create(pmap, min, max, flags) pmap_t pmap; vaddr_t min, max; int flags; { struct vm_map *result; MALLOC(result, struct vm_map *, (flags & VM_MAP_INTRSAFE) ? sizeof(struct vm_map_intrsafe) : sizeof(struct vm_map), M_VMMAP, M_WAITOK); uvm_map_setup(result, min, max, flags); result->pmap = pmap; return(result); } /* * uvm_map_setup: init map * * => map must not be in service yet. */ MAP_INLINE void uvm_map_setup(map, min, max, flags) struct vm_map *map; vaddr_t min, max; int flags; { map->header.next = map->header.prev = &map->header; map->nentries = 0; map->size = 0; map->ref_count = 1; map->min_offset = min; map->max_offset = max; map->flags = flags; map->first_free = &map->header; map->hint = &map->header; map->timestamp = 0; lockinit(&map->lock, PVM, "vmmaplk", 0, 0); simple_lock_init(&map->ref_lock); simple_lock_init(&map->hint_lock); simple_lock_init(&map->flags_lock); /* * If the map is interrupt safe, place it on the list * of interrupt safe maps, for uvm_fault(). * * We almost never set up an interrupt-safe map, but we set * up quite a few regular ones (at every fork!), so put * interrupt-safe map setup in the slow path. */ if (__predict_false(flags & VM_MAP_INTRSAFE)) { struct vm_map_intrsafe *vmi = (struct vm_map_intrsafe *)map; int s; s = vmi_list_lock(); LIST_INSERT_HEAD(&vmi_list, vmi, vmi_list); vmi_list_unlock(s); } } /* * U N M A P - m a i n e n t r y p o i n t */ /* * uvm_unmap: remove mappings from a vm_map (from "start" up to "stop") * * => caller must check alignment and size * => map must be unlocked (we will lock it) */ MAP_INLINE void uvm_unmap(map, start, end) struct vm_map *map; vaddr_t start,end; { struct vm_map_entry *dead_entries; UVMHIST_FUNC("uvm_unmap"); UVMHIST_CALLED(maphist); UVMHIST_LOG(maphist, " (map=0x%x, start=0x%x, end=0x%x)", map, start, end, 0); /* * work now done by helper functions. wipe the pmap's and then * detach from the dead entries... */ vm_map_lock(map); uvm_unmap_remove(map, start, end, &dead_entries); vm_map_unlock(map); if (dead_entries != NULL) uvm_unmap_detach(dead_entries, 0); UVMHIST_LOG(maphist, "<- done", 0,0,0,0); } /* * uvm_map_reference: add reference to a map * * => map need not be locked (we use ref_lock). */ MAP_INLINE void uvm_map_reference(map) struct vm_map *map; { simple_lock(&map->ref_lock); map->ref_count++; simple_unlock(&map->ref_lock); } /* * uvm_map_deallocate: drop reference to a map * * => caller must not lock map * => we will zap map if ref count goes to zero */ MAP_INLINE void uvm_map_deallocate(map) struct vm_map *map; { int c; simple_lock(&map->ref_lock); c = --map->ref_count; simple_unlock(&map->ref_lock); if (c > 0) { return; } /* * all references gone. unmap and free. */ uvm_unmap(map, map->min_offset, map->max_offset); pmap_destroy(map->pmap); FREE(map, M_VMMAP); } #endif /* defined(UVM_MAP_INLINE) || defined(UVM_MAP) */ #endif /* _UVM_UVM_MAP_I_H_ */