1 /* 2 * Copyright (c) 2006 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 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 16 * distribution. 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. 20 * 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 32 * SUCH DAMAGE. 33 * 34 * $DragonFly: src/sys/sys/vkernel.h,v 1.10 2007/07/01 01:11:37 dillon Exp $ 35 */ 36 37 #ifndef _SYS_VKERNEL_H_ 38 #define _SYS_VKERNEL_H_ 39 40 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 41 /* 42 * KERNEL ONLY DEFINITIONS 43 */ 44 45 #ifndef _SYS_PARAM_H_ 46 #include <sys/param.h> 47 #endif 48 #ifndef _SYS_QUEUE_H_ 49 #include <sys/queue.h> 50 #endif 51 #ifndef _SYS_TREE_H_ 52 #include <sys/tree.h> 53 #endif 54 #ifndef _SYS_SPINLOCK_H_ 55 #include <sys/spinlock.h> 56 #endif 57 #ifndef _SYS_THREAD_H_ 58 #include <sys/thread.h> 59 #endif 60 #ifndef _MACHINE_FRAME_H_ 61 #include <machine/frame.h> 62 #endif 63 #ifndef _MACHINE_VFRAME_H_ 64 #include <machine/vframe.h> 65 #endif 66 #ifndef _MACHINE_LIMITS_H_ 67 #include <machine/limits.h> 68 #endif 69 70 struct vmspace_rb_tree; 71 struct vmspace_entry; 72 RB_PROTOTYPE(vmspace_rb_tree, vmspace_entry, rb_entry, rb_vmspace_compare); 73 74 /* 75 * Process operating as virtual kernels manage multiple VM spaces. The 76 * original VM space and trap context is saved in the process's vkernel 77 * structure. 78 */ 79 struct vkernel_lwp { 80 struct trapframe save_trapframe; /* swapped context */ 81 struct vextframe save_vextframe; 82 struct trapframe *user_trapframe; /* copyback to vkernel */ 83 struct vextframe *user_vextframe; 84 struct vmspace_entry *ve; 85 }; 86 87 struct vkernel_proc { 88 RB_HEAD(vmspace_rb_tree, vmspace_entry) root; 89 struct lwkt_token token; 90 int refs; 91 }; 92 93 struct vmspace_entry { 94 void *id; 95 struct vmspace *vmspace; 96 int flags; 97 int refs; /* current LWP assignments */ 98 RB_ENTRY(vmspace_entry) rb_entry; 99 }; 100 101 #define VKE_DELETED 0x0001 102 103 #ifdef _KERNEL 104 105 void vkernel_inherit(struct proc *p1, struct proc *p2); 106 void vkernel_exit(struct proc *p); 107 void vkernel_lwp_exit(struct lwp *lp); 108 void vkernel_trap(struct lwp *lp, struct trapframe *frame); 109 110 #endif 111 112 #else 113 /* 114 * USER ONLY DEFINITIONS 115 */ 116 117 #ifndef _MACHINE_PARAM_H_ 118 #include <machine/param.h> 119 #endif 120 121 #endif 122 123 /* 124 * KERNEL AND USER DEFINITIONS 125 * 126 * WARNING: vpte_t is 64 bits on a 64-bit box and 32 bits on a 32 bit box. 127 * A 2-layer page table is used on 32 bit boxes and a 4-layer 128 * page table is used on 64 bit boxes. 129 */ 130 typedef u_long vpte_t; 131 132 #if LONG_BIT == 32 133 #define VPTE_FRAME_END 32 134 #define VPTE_PAGE_BITS 10 135 #define VPTE_FRAME 0xFFFFF000L 136 #elif LONG_BIT == 64 137 #define VPTE_FRAME_END 48 138 #define VPTE_PAGE_BITS 9 139 #define VPTE_FRAME 0x000FFFFFFFFFF000L 140 #else 141 #error "LONG_BIT not defined" 142 #endif 143 144 #define VPTE_PAGE_ENTRIES (PAGE_SIZE / sizeof(vpte_t)) 145 #define VPTE_PAGE_MASK ((1 << VPTE_PAGE_BITS) - 1) 146 #define VPTE_PAGETABLE_SIZE PAGE_SIZE 147 148 #define VPTE_V 0x00000001 /* valid */ 149 #define VPTE_PS 0x00000002 /* page directory direct mapping */ 150 #define VPTE_R 0x00000004 /* readable */ 151 #define VPTE_W 0x00000008 /* writable */ 152 #define VPTE_X 0x00000010 /* executable */ 153 #define VPTE_A 0x00000020 /* page accessed bit */ 154 #define VPTE_M 0x00000040 /* page modified bit */ 155 #define VPTE_U 0x00000080 /* user access bit if managed vmspace */ 156 #define VPTE_MANAGED 0x00000100 /* managed bit ?? */ 157 #define VPTE_G 0x00000200 /* global bit ?? */ 158 #define VPTE_WIRED 0x00000400 /* wired */ 159 160 #endif 161 162