1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * from: @(#)pcb.h 5.10 (Berkeley) 5/12/91 35 * $FreeBSD$ 36 */ 37 38 #ifndef _I386_PCB_H_ 39 #define _I386_PCB_H_ 40 41 /* 42 * Intel 386 process control block 43 */ 44 #ifndef _KERNEL 45 #include <machine/segments.h> 46 #endif 47 #include <machine/npx.h> 48 49 /* 50 * NB: The fields marked with (*) are used by kernel debuggers. Their 51 * ABI should be preserved. 52 */ 53 struct pcb { 54 int pcb_edi; /* (*) */ 55 int pcb_esi; /* (*) */ 56 int pcb_ebp; /* (*) */ 57 int pcb_esp; /* (*) */ 58 int pcb_ebx; /* (*) */ 59 int pcb_eip; /* (*) */ 60 struct segment_descriptor pcb_fsd; 61 struct segment_descriptor pcb_gsd; 62 int pcb_ds; 63 int pcb_es; 64 int pcb_fs; 65 int pcb_gs; 66 int pcb_ss; 67 int pcb_cr0; 68 int pcb_cr2; 69 int pcb_cr3; 70 int pcb_cr4; 71 int pcb_dr0; 72 int pcb_dr1; 73 int pcb_dr2; 74 int pcb_dr3; 75 int pcb_dr6; 76 int pcb_dr7; 77 78 struct region_descriptor pcb_gdt; 79 struct region_descriptor pcb_idt; 80 uint16_t pcb_ldt; 81 uint16_t pcb_tr; 82 83 u_int pcb_flags; 84 #define PCB_DBREGS 0x02 /* process using debug registers */ 85 #define PCB_KERNNPX_THR 0x04 /* fpu_kern_thread() */ 86 #define PCB_NPXINITDONE 0x08 /* fpu state is initialized */ 87 #define PCB_VM86CALL 0x10 /* in vm86 call */ 88 #define PCB_NPXUSERINITDONE 0x20 /* user fpu state is initialized */ 89 #define PCB_KERNNPX 0x40 /* kernel uses npx */ 90 #define PCB_NPXNOSAVE 0x80 /* no save area for current FPU ctx */ 91 92 uint16_t pcb_initial_npxcw; 93 94 caddr_t pcb_onfault; /* copyin/out fault recovery */ 95 struct pcb_ext *pcb_ext; /* optional pcb extension */ 96 int pcb_waspsl; /* unused padding for ABI and API compat */ 97 u_long pcb_vm86[2]; /* vm86bios scratch space */ 98 union savefpu *pcb_save; 99 100 uint32_t pcb_pad[10]; 101 }; 102 103 /* Per-CPU state saved during suspend and resume. */ 104 struct susppcb { 105 struct pcb sp_pcb; 106 107 /* fpu context for suspend/resume */ 108 void *sp_fpususpend; 109 }; 110 111 #ifdef _KERNEL 112 struct trapframe; 113 114 void makectx(struct trapframe *, struct pcb *); 115 int savectx(struct pcb *) __returns_twice; 116 void resumectx(struct pcb *) __fastcall; 117 #endif 118 119 #endif /* _I386_PCB_H_ */ 120