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 35 #ifndef _SYS_VKERNEL_H_ 36 #define _SYS_VKERNEL_H_ 37 38 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 39 /* 40 * KERNEL ONLY DEFINITIONS 41 */ 42 43 #ifndef _SYS_PARAM_H_ 44 #include <sys/param.h> 45 #endif 46 #ifndef _SYS_QUEUE_H_ 47 #include <sys/queue.h> 48 #endif 49 #ifndef _SYS_TREE_H_ 50 #include <sys/tree.h> 51 #endif 52 #ifndef _SYS_SPINLOCK_H_ 53 #include <sys/spinlock.h> 54 #endif 55 #ifndef _SYS_THREAD_H_ 56 #include <sys/thread.h> 57 #endif 58 #include <machine/frame.h> 59 #include <machine/vframe.h> 60 #include <machine/limits.h> 61 62 struct vmspace_rb_tree; 63 struct vmspace_entry; 64 struct lwp; 65 RB_PROTOTYPE(vmspace_rb_tree, vmspace_entry, rb_entry, rb_vmspace_compare); 66 67 /* 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 70 * structure. 71 */ 72 struct vkernel_lwp { 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; 79 }; 80 81 struct vkernel_proc { 82 RB_HEAD(vmspace_rb_tree, vmspace_entry) root; 83 struct lwkt_token token; 84 int refs; 85 register_t vkernel_cr3; 86 }; 87 88 struct vmspace_entry { 89 void *id; 90 struct vmspace *vmspace; 91 uint32_t flags; 92 uint32_t refs; /* in-use + 1(on-tree */ 93 uint32_t cache_refs; /* cache count (separate) */ 94 RB_ENTRY(vmspace_entry) rb_entry; 95 }; 96 97 #define VKE_REF_DELETED 0x80000000U 98 99 #ifdef _KERNEL 100 101 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); 105 106 #endif 107 108 #else 109 /* 110 * USER ONLY DEFINITIONS 111 */ 112 113 #ifndef _MACHINE_PARAM_H_ 114 #include <machine/param.h> 115 #endif 116 117 #endif 118 119 /* 120 * KERNEL AND USER DEFINITIONS 121 * 122 * WARNING: vpte_t is 64 bits. A 4-layer page table is used. 123 */ 124 typedef u_long vpte_t; 125 126 #if LONG_BIT == 32 127 #define VPTE_FRAME_END 32 128 #define VPTE_PAGE_BITS 10 129 #define VPTE_FRAME 0xFFFFF000L 130 #elif LONG_BIT == 64 131 #define VPTE_FRAME_END 48 132 #define VPTE_PAGE_BITS 9 133 #define VPTE_FRAME 0x000FFFFFFFFFF000L 134 #else 135 #error "LONG_BIT not defined" 136 #endif 137 138 #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 141 142 #define VPTE_V 0x00000001 /* valid */ 143 #define VPTE_RW 0x00000002 /* read/write */ 144 #define VPTE_U 0x00000004 /* user access bit if managed vmspace */ 145 146 #define VPTE_A 0x00000020 /* page accessed bit */ 147 #define VPTE_M 0x00000040 /* page modified bit */ 148 #define VPTE_PS 0x00000080 /* page directory direct mapping */ 149 150 #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 */ 154 155 #endif 156 157