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 35 #ifndef _I386_PCB_H_ 36 #define _I386_PCB_H_ 37 38 /* 39 * Intel 386 process control block 40 */ 41 #ifndef _KERNEL 42 #include <machine/segments.h> 43 #endif 44 #include <machine/npx.h> 45 46 /* 47 * NB: The fields marked with (*) are used by kernel debuggers. Their 48 * ABI should be preserved. 49 */ 50 struct pcb { 51 int pcb_edi; /* (*) */ 52 int pcb_esi; /* (*) */ 53 int pcb_ebp; /* (*) */ 54 int pcb_esp; /* (*) */ 55 int pcb_ebx; /* (*) */ 56 int pcb_eip; /* (*) */ 57 struct segment_descriptor pcb_fsd; 58 struct segment_descriptor pcb_gsd; 59 int pcb_ds; 60 int pcb_es; 61 int pcb_fs; 62 int pcb_gs; 63 int pcb_ss; 64 int pcb_cr0; 65 int pcb_cr2; 66 int pcb_cr3; 67 int pcb_cr4; 68 int pcb_dr0; 69 int pcb_dr1; 70 int pcb_dr2; 71 int pcb_dr3; 72 int pcb_dr6; 73 int pcb_dr7; 74 75 struct region_descriptor pcb_gdt; 76 struct region_descriptor pcb_idt; 77 uint16_t pcb_ldt; 78 uint16_t pcb_tr; 79 80 u_int pcb_flags; 81 #define PCB_DBREGS 0x02 /* process using debug registers */ 82 #define PCB_KERNNPX_THR 0x04 /* fpu_kern_thread() */ 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 #define PCB_NPXNOSAVE 0x80 /* no save area for current FPU ctx */ 88 89 uint16_t pcb_initial_npxcw; 90 91 caddr_t pcb_onfault; /* copyin/out fault recovery */ 92 struct pcb_ext *pcb_ext; /* optional pcb extension */ 93 int pcb_waspsl; /* unused padding for ABI and API compat */ 94 u_long pcb_vm86[2]; /* vm86bios scratch space */ 95 union savefpu *pcb_save; 96 97 uint32_t pcb_pad[10]; 98 }; 99 100 /* Per-CPU state saved during suspend and resume. */ 101 struct susppcb { 102 struct pcb sp_pcb; 103 104 /* fpu context for suspend/resume */ 105 void *sp_fpususpend; 106 }; 107 108 #ifdef _KERNEL 109 struct trapframe; 110 111 void makectx(struct trapframe *, struct pcb *); 112 int savectx(struct pcb *) __returns_twice; 113 void resumectx(struct pcb *) __fastcall; 114 #endif 115 116 #endif /* _I386_PCB_H_ */ 117