pcb.h revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
5 * Copyright (C) 1995, 1996 TooLs GmbH.
6 * All rights reserved.
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. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by TooLs GmbH.
19 * 4. The name of TooLs GmbH may not be used to endorse or promote products
20 *    derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 *
33 *	$NetBSD: pcb.h,v 1.4 2000/06/04 11:57:17 tsubai Exp $
34 * $FreeBSD: stable/11/sys/powerpc/include/pcb.h 330897 2018-03-14 03:19:51Z eadler $
35 */
36
37#ifndef _MACHINE_PCB_H_
38#define	_MACHINE_PCB_H_
39
40#include <machine/setjmp.h>
41
42struct pcb {
43	register_t	pcb_context[20];	/* non-volatile r14-r31 */
44	register_t	pcb_cr;			/* Condition register */
45	register_t	pcb_sp;			/* stack pointer */
46	register_t	pcb_toc;		/* toc pointer */
47	register_t	pcb_lr;			/* link register */
48	struct		pmap *pcb_pm;		/* pmap of our vmspace */
49	jmp_buf		*pcb_onfault;		/* For use during
50						    copyin/copyout */
51	int		pcb_flags;
52#define	PCB_FPU		1	/* Process uses FPU */
53#define	PCB_FPREGS	2	/* Process had FPU registers initialized */
54#define	PCB_VEC		4	/* Process had Altivec initialized */
55#define	PCB_VSX		8	/* Process had VSX initialized */
56	struct fpu {
57		union {
58			double fpr;
59			uint32_t vsr[4];
60		} fpr[32];
61		double	fpscr;	/* FPSCR stored as double for easier access */
62	} pcb_fpu;		/* Floating point processor */
63	unsigned int	pcb_fpcpu;		/* which CPU had our FPU
64							stuff. */
65	struct vec {
66		uint32_t vr[32][4];
67		uint32_t spare[2];
68		uint32_t vrsave;
69		uint32_t vscr;	/* aligned at vector element 3 */
70	} pcb_vec __aligned(16);	/* Vector processor */
71	unsigned int	pcb_veccpu;		/* which CPU had our vector
72							stuff. */
73
74	union {
75		struct {
76			vm_offset_t	usr_segm;	/* Base address */
77			register_t	usr_vsid;	/* USER_SR segment */
78		} aim;
79		struct {
80			register_t	dbcr0;
81		} booke;
82	} pcb_cpu;
83};
84
85#ifdef	_KERNEL
86
87struct trapframe;
88
89#ifndef curpcb
90extern struct pcb *curpcb;
91#endif
92
93extern struct pmap *curpm;
94extern struct proc *fpuproc;
95
96void	makectx(struct trapframe *, struct pcb *);
97void	savectx(struct pcb *) __returns_twice;
98
99#endif
100#endif	/* _MACHINE_PCB_H_ */
101