2 * Copyright (c) 1990 The Regents of the University of California.
3 * Copyright (c) 2003 Peter Wemm.
4 * Copyright (c) 2008 The DragonFly Project.
7 * This code is derived from software contributed to Berkeley by
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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
34 * from: @(#)pcb.h 5.10 (Berkeley) 5/12/91
35 * $FreeBSD: src/sys/amd64/include/pcb.h,v 1.57 2004/01/28 23:54:31 peter Exp $
36 * $DragonFly: src/sys/platform/pc64/include/pcb.h,v 1.3 2008/08/29 17:07:17 dillon Exp $
39 #ifndef _MACHINE_PCB_H_
40 #define _MACHINE_PCB_H_
43 * x86_64 process control block
45 * WARNING! union savefpu has a 64-byte alignment requirement built-in
46 * which will adjust the size of this structure.
48 #include <machine/npx.h>
52 register_t pcb_cr3_iso; /* isolated U (+minimal K) PML4e */
53 register_t pcb_cr3; /* U+K PML4e */
64 register_t pcb_rflags;
65 register_t pcb_fsbase;
66 register_t pcb_gsbase;
79 struct pcb_ldt *pcb_ldt;
80 union savefpu pcb_save;
81 caddr_t pcb_onfault; /* copyin/out fault recovery */
82 register_t pcb_onfault_sp; /* validate onfault */
83 register_t pcb_unused[4]; /* kgdb compatibility expansion */
84 struct pcb_ext *pcb_ext; /* optional pcb extension */
87 #define PCB_DBREGS 0x00000002 /* process using debug registers */
88 #define PCB_FPUINITDONE 0x00000008 /* fpu state is initialized */
89 #define PCB_ISOMMU 0x00000010 /* MMU isolation */
91 #define FP_SOFTFP 0x01 /* process using soft flt emulator */
92 #define FP_VIRTFP 0x04 /* vkernel wants exception */
94 #define SPEC_CTRL_DUMMY_IBPB SPEC_CTRL_DUMMY1
95 #define SPEC_CTRL_DUMMY_ENABLE SPEC_CTRL_DUMMY2
98 void savectx(struct pcb *);
101 #endif /* _MACHINE_PCB_H_ */