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 */
35
36#ifndef _MACHINE_PCB_H_
37#define	_MACHINE_PCB_H_
38
39#include <sys/endian.h>
40
41#include <machine/setjmp.h>
42
43#ifndef _STANDALONE
44struct pcb {
45	register_t	pcb_context[20];	/* non-volatile r12-r31 */
46	register_t	pcb_cr;			/* Condition register */
47	register_t	pcb_sp;			/* stack pointer */
48	register_t	pcb_toc;		/* toc pointer */
49	register_t	pcb_lr;			/* link register */
50	register_t	pcb_dscr;		/* dscr value */
51	register_t	pcb_fscr;
52	register_t	pcb_tar;
53	struct		pmap *pcb_pm;		/* pmap of our vmspace */
54	jmp_buf		*pcb_onfault;		/* For use during
55						    copyin/copyout */
56	int		pcb_flags;
57#define	PCB_FPU		0x1	/* Process uses FPU */
58#define	PCB_FPREGS	0x2	/* Process had FPU registers initialized */
59#define	PCB_VEC		0x4	/* Process uses Altivec */
60#define	PCB_VSX		0x8	/* Process had VSX initialized */
61#define	PCB_CDSCR	0x10	/* Process had Custom DSCR initialized */
62#define	PCB_HTM		0x20	/* Process had HTM initialized */
63#define	PCB_CFSCR	0x40	/* Process had FSCR updated */
64#define	PCB_KERN_FPU    0x80	/* Kernel is using FPU/Vector unit */
65#define	PCB_KERN_FPU_NOSAVE 0x100 /* FPU/Vec state not saved for kernel use */
66#define	PCB_VECREGS     0x200	/* Process had Altivec registers initialized */
67	struct fpu {
68		union {
69#if _BYTE_ORDER == _BIG_ENDIAN
70			double fpr;
71			uint32_t vsr[4];
72#else
73			uint32_t vsr[4];
74			struct {
75				double padding;
76				double fpr;
77			};
78#endif
79		} fpr[32];
80		double	fpscr;	/* FPSCR stored as double for easier access */
81	} pcb_fpu;		/* Floating point processor */
82	unsigned int	pcb_fpcpu;		/* which CPU had our FPU
83							stuff. */
84	struct vec {
85		uint32_t vr[32][4];
86		uint32_t spare[2];
87		uint32_t vrsave;
88		uint32_t vscr;	/* aligned at vector element 3 */
89	} pcb_vec __aligned(16);	/* Vector processor */
90	unsigned int	pcb_veccpu;		/* which CPU had our vector
91							stuff. */
92	struct htm {
93		uint64_t tfhar;
94		uint64_t texasr;
95		uint64_t tfiar;
96	} pcb_htm;
97
98	struct ebb {
99		uint64_t ebbhr;
100		uint64_t ebbrr;
101		uint64_t bescr;
102	} pcb_ebb;
103
104	struct lmon {
105		uint64_t lmrr;
106		uint64_t lmser;
107	} pcb_lm;
108
109	union {
110		struct {
111			vm_offset_t	usr_segm;	/* Base address */
112			register_t	usr_vsid;	/* USER_SR segment */
113		} aim;
114		struct {
115			register_t	dbcr0;
116		} booke;
117	} pcb_cpu;
118	vm_offset_t pcb_lastill;	/* Last illegal instruction */
119};
120#endif
121
122#ifdef	_KERNEL
123
124struct trapframe;
125
126#ifndef curpcb
127extern struct pcb *curpcb;
128#endif
129
130extern struct pmap *curpm;
131extern struct proc *fpuproc;
132
133void	makectx(struct trapframe *, struct pcb *);
134void	savectx(struct pcb *) __returns_twice;
135
136#endif
137#endif	/* _MACHINE_PCB_H_ */
138