2 * Copyright (c) 2006 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * $DragonFly: src/sys/sys/vkernel.h,v 1.10 2007/07/01 01:11:37 dillon Exp $
37 #ifndef _SYS_VKERNEL_H_
38 #define _SYS_VKERNEL_H_
40 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
42 * KERNEL ONLY DEFINITIONS
46 #include <sys/param.h>
49 #include <sys/queue.h>
54 #ifndef _SYS_SPINLOCK_H_
55 #include <sys/spinlock.h>
57 #ifndef _MACHINE_FRAME_H_
58 #include <machine/frame.h>
60 #ifndef _MACHINE_VFRAME_H_
61 #include <machine/vframe.h>
63 #ifndef _MACHINE_LIMITS_H_
64 #include <machine/limits.h>
67 struct vmspace_rb_tree;
69 RB_PROTOTYPE(vmspace_rb_tree, vmspace_entry, rb_entry, rb_vmspace_compare);
72 * Process operating as virtual kernels manage multiple VM spaces. The
73 * original VM space and trap context is saved in the process's vkernel
77 struct trapframe save_trapframe; /* swapped context */
78 struct vextframe save_vextframe;
79 struct trapframe *user_trapframe; /* copyback to vkernel */
80 struct vextframe *user_vextframe;
81 struct vmspace_entry *ve;
85 RB_HEAD(vmspace_rb_tree, vmspace_entry) root;
90 struct vmspace_entry {
92 struct vmspace *vmspace;
94 int refs; /* current LWP assignments */
95 RB_ENTRY(vmspace_entry) rb_entry;
100 void vkernel_inherit(struct proc *p1, struct proc *p2);
101 void vkernel_exit(struct proc *p);
102 void vkernel_lwp_exit(struct lwp *lp);
103 void vkernel_trap(struct lwp *lp, struct trapframe *frame);
109 * USER ONLY DEFINITIONS
112 #ifndef _MACHINE_PARAM_H_
113 #include <machine/param.h>
119 * KERNEL AND USER DEFINITIONS
121 * WARNING: vpte_t is 64 bits on a 64-bit box and 32 bits on a 32 bit box.
122 * A 2-layer page table is used on 32 bit boxes and a 4-layer
123 * page table is used on 64 bit boxes.
125 typedef u_long vpte_t;
128 #define VPTE_FRAME_END 32
129 #define VPTE_PAGE_BITS 10
130 #define VPTE_FRAME 0xFFFFF000L
132 #define VPTE_FRAME_END 48
133 #define VPTE_PAGE_BITS 9
134 #define VPTE_FRAME 0x000FFFFFFFFFF000L
136 #error "LONG_BIT not defined"
139 #define VPTE_PAGE_ENTRIES (PAGE_SIZE / sizeof(vpte_t))
140 #define VPTE_PAGE_MASK ((1 << VPTE_PAGE_BITS) - 1)
141 #define VPTE_PAGETABLE_SIZE PAGE_SIZE
143 #define VPTE_V 0x00000001 /* valid */
144 #define VPTE_PS 0x00000002 /* page directory direct mapping */
145 #define VPTE_R 0x00000004 /* readable */
146 #define VPTE_W 0x00000008 /* writable */
147 #define VPTE_X 0x00000010 /* executable */
148 #define VPTE_A 0x00000020 /* page accessed bit */
149 #define VPTE_M 0x00000040 /* page modified bit */
150 #define VPTE_U 0x00000080 /* user access bit if managed vmspace */
151 #define VPTE_MANAGED 0x00000100 /* managed bit ?? */
152 #define VPTE_G 0x00000200 /* global bit ?? */
153 #define VPTE_WIRED 0x00000400 /* wired */