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
35 #ifndef _SYS_VKERNEL_H_
36 #define _SYS_VKERNEL_H_
38 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
40 * KERNEL ONLY DEFINITIONS
44 #include <sys/param.h>
47 #include <sys/queue.h>
52 #ifndef _SYS_SPINLOCK_H_
53 #include <sys/spinlock.h>
55 #ifndef _SYS_THREAD_H_
56 #include <sys/thread.h>
58 #include <machine/frame.h>
59 #include <machine/vframe.h>
60 #include <machine/limits.h>
62 struct vmspace_rb_tree;
65 RB_PROTOTYPE(vmspace_rb_tree, vmspace_entry, rb_entry, rb_vmspace_compare);
68 * Process operating as virtual kernels manage multiple VM spaces. The
69 * original VM space and trap context is saved in the process's vkernel
73 struct trapframe save_trapframe; /* swapped context */
74 struct vextframe save_vextframe;
75 struct trapframe *user_trapframe; /* copyback to vkernel */
76 struct vextframe *user_vextframe;
77 struct vmspace_entry *ve;
78 struct vmspace_entry *ve_cache;
82 RB_HEAD(vmspace_rb_tree, vmspace_entry) root;
83 struct lwkt_token token;
85 register_t vkernel_cr3;
88 struct vmspace_entry {
90 struct vmspace *vmspace;
92 uint32_t refs; /* in-use + 1(on-tree */
93 uint32_t cache_refs; /* cache count (separate) */
94 RB_ENTRY(vmspace_entry) rb_entry;
97 #define VKE_REF_DELETED 0x80000000U
101 void vkernel_inherit(struct proc *p1, struct proc *p2);
102 void vkernel_exit(struct proc *p);
103 void vkernel_lwp_exit(struct lwp *lp);
104 void vkernel_trap(struct lwp *lp, struct trapframe *frame);
110 * USER ONLY DEFINITIONS
113 #ifndef _MACHINE_PARAM_H_
114 #include <machine/param.h>
120 * KERNEL AND USER DEFINITIONS
122 * WARNING: vpte_t is 64 bits. A 4-layer page table is used.
124 typedef u_long vpte_t;
127 #define VPTE_FRAME_END 32
128 #define VPTE_PAGE_BITS 10
129 #define VPTE_FRAME 0xFFFFF000L
131 #define VPTE_FRAME_END 48
132 #define VPTE_PAGE_BITS 9
133 #define VPTE_FRAME 0x000FFFFFFFFFF000L
135 #error "LONG_BIT not defined"
138 #define VPTE_PAGE_ENTRIES (PAGE_SIZE / sizeof(vpte_t))
139 #define VPTE_PAGE_MASK ((1 << VPTE_PAGE_BITS) - 1)
140 #define VPTE_PAGETABLE_SIZE PAGE_SIZE
142 #define VPTE_V 0x00000001 /* valid */
143 #define VPTE_RW 0x00000002 /* read/write */
144 #define VPTE_U 0x00000004 /* user access bit if managed vmspace */
146 #define VPTE_A 0x00000020 /* page accessed bit */
147 #define VPTE_M 0x00000040 /* page modified bit */
148 #define VPTE_PS 0x00000080 /* page directory direct mapping */
150 #define VPTE_G 0x00000100 /* global bit ?? */
151 #define VPTE_WIRED 0x00000200 /* wired */
152 #define VPTE_MANAGED 0x00000400 /* managed bit ?? */
153 #define VPTE_NX 0x00000800 /* no-execute bit */