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 RB_PROTOTYPE(vmspace_rb_tree, vmspace_entry, rb_entry, rb_vmspace_compare); 65 66 /* 67 * Process operating as virtual kernels manage multiple VM spaces. The 68 * original VM space and trap context is saved in the process's vkernel 69 * structure. 70 */ 71 struct vkernel_lwp { 72 struct trapframe save_trapframe; /* swapped context */ 73 struct vextframe save_vextframe; 74 struct trapframe *user_trapframe; /* copyback to vkernel */ 75 struct vextframe *user_vextframe; 76 struct vmspace_entry *ve; 77 }; 78 79 struct vkernel_proc { 80 RB_HEAD(vmspace_rb_tree, vmspace_entry) root; 81 struct lwkt_token token; 82 int refs; 83 register_t vkernel_cr3; 84 }; 85 86 struct vmspace_entry { 87 void *id; 88 struct vmspace *vmspace; 89 int flags; 90 int refs; /* current LWP assignments */ 91 RB_ENTRY(vmspace_entry) rb_entry; 92 }; 93 94 #define VKE_DELETED 0x0001 95 96 #ifdef _KERNEL 97 98 void vkernel_inherit(struct proc *p1, struct proc *p2); 99 void vkernel_exit(struct proc *p); 100 void vkernel_lwp_exit(struct lwp *lp); 101 void vkernel_trap(struct lwp *lp, struct trapframe *frame); 102 103 #endif 104 105 #else 106 /* 107 * USER ONLY DEFINITIONS 108 */ 109 110 #ifndef _MACHINE_PARAM_H_ 111 #include <machine/param.h> 112 #endif 113 114 #endif 115 116 /* 117 * KERNEL AND USER DEFINITIONS 118 * 119 * WARNING: vpte_t is 64 bits on a 64-bit box and 32 bits on a 32 bit box. 120 * A 2-layer page table is used on 32 bit boxes and a 4-layer 121 * page table is used on 64 bit boxes. 122 */ 123 typedef u_long vpte_t; 124 125 #if LONG_BIT == 32 126 #define VPTE_FRAME_END 32 127 #define VPTE_PAGE_BITS 10 128 #define VPTE_FRAME 0xFFFFF000L 129 #elif LONG_BIT == 64 130 #define VPTE_FRAME_END 48 131 #define VPTE_PAGE_BITS 9 132 #define VPTE_FRAME 0x000FFFFFFFFFF000L 133 #else 134 #error "LONG_BIT not defined" 135 #endif 136 137 #define VPTE_PAGE_ENTRIES (PAGE_SIZE / sizeof(vpte_t)) 138 #define VPTE_PAGE_MASK ((1 << VPTE_PAGE_BITS) - 1) 139 #define VPTE_PAGETABLE_SIZE PAGE_SIZE 140 141 #define VPTE_V 0x00000001 /* valid */ 142 #define VPTE_RW 0x00000002 /* read/write */ 143 #define VPTE_U 0x00000004 /* user access bit if managed vmspace */ 144 145 #define VPTE_A 0x00000020 /* page accessed bit */ 146 #define VPTE_M 0x00000040 /* page modified bit */ 147 #define VPTE_PS 0x00000080 /* page directory direct mapping */ 148 149 #define VPTE_G 0x00000100 /* global bit ?? */ 150 #define VPTE_WIRED 0x00000200 /* wired */ 151 #define VPTE_MANAGED 0x00000400 /* managed bit ?? */ 152 153 154 #endif 155 156