1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 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 the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * from: @(#)pcb.h 5.10 (Berkeley) 5/12/91 33 * $FreeBSD$ 34 */ 35 36 #ifndef _I386_PCB_H_ 37 #define _I386_PCB_H_ 38 39 /* 40 * Intel 386 process control block 41 */ 42 #ifndef _KERNEL 43 #include <machine/segments.h> 44 #endif 45 #include <machine/npx.h> 46 47 /* 48 * NB: The fields marked with (*) are used by kernel debuggers. Their 49 * ABI should be preserved. 50 */ 51 struct pcb { 52 int pcb_edi; /* (*) */ 53 int pcb_esi; /* (*) */ 54 int pcb_ebp; /* (*) */ 55 int pcb_esp; /* (*) */ 56 int pcb_ebx; /* (*) */ 57 int pcb_eip; /* (*) */ 58 struct segment_descriptor pcb_fsd; 59 struct segment_descriptor pcb_gsd; 60 int pcb_ds; 61 int pcb_es; 62 int pcb_fs; 63 int pcb_gs; 64 int pcb_ss; 65 int pcb_cr0; 66 int pcb_cr2; 67 int pcb_cr3; 68 int pcb_cr4; 69 int pcb_dr0; 70 int pcb_dr1; 71 int pcb_dr2; 72 int pcb_dr3; 73 int pcb_dr6; 74 int pcb_dr7; 75 76 struct region_descriptor pcb_gdt; 77 struct region_descriptor pcb_idt; 78 uint16_t pcb_ldt; 79 uint16_t pcb_tr; 80 81 u_int pcb_flags; 82 #define PCB_DBREGS 0x02 /* process using debug registers */ 83 #define PCB_NPXINITDONE 0x08 /* fpu state is initialized */ 84 #define PCB_VM86CALL 0x10 /* in vm86 call */ 85 #define PCB_NPXUSERINITDONE 0x20 /* user fpu state is initialized */ 86 #define PCB_KERNNPX 0x40 /* kernel uses npx */ 87 88 uint16_t pcb_initial_npxcw; 89 90 caddr_t pcb_onfault; /* copyin/out fault recovery */ 91 struct pcb_ext *pcb_ext; /* optional pcb extension */ 92 int pcb_waspsl; /* unused padding for ABI and API compat */ 93 u_long pcb_vm86[2]; /* vm86bios scratch space */ 94 union savefpu *pcb_save; 95 96 uint32_t pcb_pad[10]; 97 }; 98 99 /* Per-CPU state saved during suspend and resume. */ 100 struct susppcb { 101 struct pcb sp_pcb; 102 103 /* fpu context for suspend/resume */ 104 void *sp_fpususpend; 105 }; 106 107 #ifdef _KERNEL 108 struct trapframe; 109 110 void makectx(struct trapframe *, struct pcb *); 111 int savectx(struct pcb *) __returns_twice; 112 void resumectx(struct pcb *) __fastcall; 113 #endif 114 115 #endif /* _I386_PCB_H_ */ 116