pcb.h revision 266004 
1/*-
2 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
3 * Copyright (C) 1995, 1996 TooLs GmbH.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *	This product includes software developed by TooLs GmbH.
17 * 4. The name of TooLs GmbH may not be used to endorse or promote products
18 *    derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 *	$NetBSD: pcb.h,v 1.4 2000/06/04 11:57:17 tsubai Exp $
32 * $FreeBSD: stable/10/sys/powerpc/include/pcb.h 266004 2014-05-14 04:42:38Z ian $
33 */
34
35#ifndef _MACHINE_PCB_H_
36#define	_MACHINE_PCB_H_
37
38typedef register_t faultbuf[25];
39
40struct pcb {
41	register_t	pcb_context[20];	/* non-volatile r14-r31 */
42	register_t	pcb_cr;			/* Condition register */
43	register_t	pcb_sp;			/* stack pointer */
44	register_t	pcb_toc;		/* toc pointer */
45	register_t	pcb_lr;			/* link register */
46	struct		pmap *pcb_pm;		/* pmap of our vmspace */
47	faultbuf	*pcb_onfault;		/* For use during
48						    copyin/copyout */
49	int		pcb_flags;
50#define	PCB_FPU		1	/* Process uses FPU */
51#define	PCB_FPREGS	2	/* Process had FPU registers initialized */
52#define	PCB_VEC		4	/* Process had Altivec initialized */
53	struct fpu {
54		double	fpr[32];
55		double	fpscr;	/* FPSCR stored as double for easier access */
56	} pcb_fpu;		/* Floating point processor */
57	unsigned int	pcb_fpcpu;		/* which CPU had our FPU
58							stuff. */
59	struct vec {
60		uint32_t vr[32][4];
61		register_t vrsave;
62		register_t spare[2];
63		register_t vscr;	/* aligned at vector element 3 */
64	} pcb_vec __aligned(16);	/* Vector processor */
65	unsigned int	pcb_veccpu;		/* which CPU had our vector
66							stuff. */
67
68	union {
69		struct {
70			vm_offset_t	usr_segm;	/* Base address */
71			register_t	usr_vsid;	/* USER_SR segment */
72		} aim;
73		struct {
74			register_t	dbcr0;
75		} booke;
76	} pcb_cpu;
77};
78
79#ifdef	_KERNEL
80
81struct trapframe;
82
83#ifndef curpcb
84extern struct pcb *curpcb;
85#endif
86
87extern struct pmap *curpm;
88extern struct proc *fpuproc;
89
90void	makectx(struct trapframe *, struct pcb *);
91void	savectx(struct pcb *) __returns_twice;
92
93#endif
94#endif	/* _MACHINE_PCB_H_ */
95