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_ */