1 /* $OpenBSD: uvm_km.h,v 1.11 2010/07/15 00:14:17 tedu Exp $ */ 2 /* $NetBSD: uvm_km.h,v 1.9 1999/06/21 17:25:11 thorpej Exp $ */ 3 4 /* 5 * 6 * Copyright (c) 1997 Charles D. Cranor and Washington University. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Charles D. Cranor and 20 * Washington University. 21 * 4. The name of the author may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 * 35 * from: Id: uvm_km.h,v 1.1.2.2 1997/12/30 12:03:15 mrg Exp 36 */ 37 38 #ifndef _UVM_UVM_KM_H_ 39 #define _UVM_UVM_KM_H_ 40 41 /* 42 * uvm_km.h 43 */ 44 45 #ifdef _KERNEL 46 47 /* 48 * prototypes 49 */ 50 51 void uvm_km_init(vaddr_t, vaddr_t); 52 void uvm_km_page_init(void); 53 void uvm_km_pgremove(struct uvm_object *, vaddr_t, vaddr_t); 54 void uvm_km_pgremove_intrsafe(vaddr_t, vaddr_t); 55 56 #if !defined(__HAVE_PMAP_DIRECT) 57 58 #define UVM_KM_PAGES_LOWAT_MAX (2048) 59 #define UVM_KM_PAGES_HIWAT_MAX (4 * UVM_KM_PAGES_LOWAT_MAX) 60 61 struct uvm_km_free_page { 62 struct uvm_km_free_page *next; 63 }; 64 struct uvm_km_pages { 65 struct mutex mtx; 66 67 /* Low and high water mark for addresses. */ 68 int lowat; 69 int hiwat; 70 71 /* Kernel address pool. */ 72 int free; 73 vaddr_t page[UVM_KM_PAGES_HIWAT_MAX]; 74 75 struct uvm_km_free_page *freelist; 76 int freelistlen; 77 78 struct proc *km_proc; 79 }; 80 81 extern struct uvm_km_pages uvm_km_pages; 82 #endif /* _HAVE_PMAP_DIRECT */ 83 84 #endif /* _KERNEL */ 85 86 #endif /* _UVM_UVM_KM_H_ */ 87