xref: /freebsd/sys/powerpc/include/pcb.h (revision 396c556d77189a5c474d35cec6f44a762e310b7d)
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  * $FreeBSD$
35  */
36 
37 #ifndef _MACHINE_PCB_H_
38 #define	_MACHINE_PCB_H_
39 
40 #include <machine/setjmp.h>
41 
42 struct 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 
87 struct trapframe;
88 
89 #ifndef curpcb
90 extern struct pcb *curpcb;
91 #endif
92 
93 extern struct pmap *curpm;
94 extern struct proc *fpuproc;
95 
96 void	makectx(struct trapframe *, struct pcb *);
97 void	savectx(struct pcb *) __returns_twice;
98 
99 #endif
100 #endif	/* _MACHINE_PCB_H_ */
101