1 /* $OpenBSD: uvm_km.h,v 1.15 2017/05/11 00:42:05 dlg Exp $ */ 2 /* $NetBSD: uvm_km.h,v 1.9 1999/06/21 17:25:11 thorpej Exp $ */ 3 4 /* 5 * Copyright (c) 1997 Charles D. Cranor and Washington University. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * from: Id: uvm_km.h,v 1.1.2.2 1997/12/30 12:03:15 mrg Exp 29 */ 30 31 #ifndef _UVM_UVM_KM_H_ 32 #define _UVM_UVM_KM_H_ 33 34 /* 35 * uvm_km.h 36 */ 37 38 #ifdef _KERNEL 39 40 #include <sys/mutex.h> 41 42 /* 43 * prototypes 44 */ 45 46 void uvm_km_init(vaddr_t, vaddr_t, vaddr_t); 47 void uvm_km_page_init(void); 48 void uvm_km_page_lateinit(void); 49 void uvm_km_pgremove(struct uvm_object *, vaddr_t, vaddr_t); 50 void uvm_km_pgremove_intrsafe(vaddr_t, vaddr_t); 51 52 #if !defined(__HAVE_PMAP_DIRECT) 53 54 #define UVM_KM_PAGES_LOWAT_MAX (2048) 55 #define UVM_KM_PAGES_HIWAT_MAX (4 * UVM_KM_PAGES_LOWAT_MAX) 56 57 struct uvm_km_free_page { 58 struct uvm_km_free_page *next; 59 }; 60 struct uvm_km_pages { 61 struct mutex mtx; 62 63 /* Low and high water mark for addresses. */ 64 int lowat; 65 int hiwat; 66 67 /* Kernel address pool. */ 68 int free; 69 vaddr_t page[UVM_KM_PAGES_HIWAT_MAX]; 70 71 struct uvm_km_free_page *freelist; 72 int freelistlen; 73 74 struct proc *km_proc; 75 }; 76 77 extern struct uvm_km_pages uvm_km_pages; 78 #endif /* _HAVE_PMAP_DIRECT */ 79 80 #endif /* _KERNEL */ 81 82 #endif /* _UVM_UVM_KM_H_ */ 83