pcb.h

/*-
 * SPDX-License-Identifier: BSD-4-Clause
 *
 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
 * Copyright (C) 1995, 1996 TooLs GmbH.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by TooLs GmbH.
 * 4. The name of TooLs GmbH may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *	$NetBSD: pcb.h,v 1.4 2000/06/04 11:57:17 tsubai Exp $
 */

#ifndef _MACHINE_PCB_H_
#define	_MACHINE_PCB_H_

#include <sys/endian.h>

#include <machine/setjmp.h>

#ifndef _STANDALONE
/*
 * struct pcb is known to and used by kernel debuggers. Its layout must be kept
 * stable. When adding extra fields that are accessed by kernel debuggers,
 * debuggers should be backward compatible by using osreldate.
 */
struct pcb {
	register_t	pcb_context[20];	/* non-volatile r12-r31 */
	register_t	pcb_cr;			/* Condition register */
	register_t	pcb_sp;			/* stack pointer */
	register_t	pcb_toc;		/* toc pointer */
	register_t	pcb_lr;			/* link register */
	register_t	pcb_dscr;		/* dscr value */
	register_t	pcb_fscr;
	register_t	pcb_tar;
	struct		pmap *pcb_pm;		/* pmap of our vmspace */
	jmp_buf		*pcb_onfault;		/* For use during
						    copyin/copyout */
	int		pcb_flags;
#define	PCB_FPU		0x1	/* Process uses FPU */
#define	PCB_FPREGS	0x2	/* Process had FPU registers initialized */
#define	PCB_VEC		0x4	/* Process uses Altivec */
#define	PCB_VSX		0x8	/* Process had VSX initialized */
#define	PCB_CDSCR	0x10	/* Process had Custom DSCR initialized */
#define	PCB_HTM		0x20	/* Process had HTM initialized */
#define	PCB_CFSCR	0x40	/* Process had FSCR updated */
#define	PCB_KERN_FPU    0x80	/* Kernel is using FPU/Vector unit */
#define	PCB_KERN_FPU_NOSAVE 0x100 /* FPU/Vec state not saved for kernel use */
#define	PCB_VECREGS     0x200	/* Process had Altivec registers initialized */
	struct fpu {
		union {
			uint32_t vsr[4];
			double fpr;
		} fpr[32];
		double	fpscr;	/* FPSCR stored as double for easier access */
	} pcb_fpu;		/* Floating point processor */
	unsigned int	pcb_fpcpu;		/* which CPU had our FPU
							stuff. */
	struct vec {
		uint32_t vr[32][4];
		uint32_t spare[2];
		uint32_t vrsave;
		uint32_t vscr;	/* aligned at vector element 3 */
	} pcb_vec __aligned(16);	/* Vector processor */
	unsigned int	pcb_veccpu;		/* which CPU had our vector
							stuff. */
	struct htm {
		uint64_t tfhar;
		uint64_t texasr;
		uint64_t tfiar;
	} pcb_htm;

	struct ebb {
		uint64_t ebbhr;
		uint64_t ebbrr;
		uint64_t bescr;
	} pcb_ebb;

	struct lmon {
		uint64_t lmrr;
		uint64_t lmser;
	} pcb_lm;

	union {
		struct {
			vm_offset_t	usr_segm;	/* Base address */
			register_t	usr_vsid;	/* USER_SR segment */
		} aim;
		struct {
			register_t	dbcr0;
		} booke;
	} pcb_cpu;
	vm_offset_t pcb_lastill;	/* Last illegal instruction */
};
#endif

#ifdef	_KERNEL

struct trapframe;

#ifndef curpcb
extern struct pcb *curpcb;
#endif

extern struct pmap *curpm;
extern struct proc *fpuproc;

void	makectx(struct trapframe *, struct pcb *);
void	savectx(struct pcb *) __returns_twice;

#endif
#endif	/* _MACHINE_PCB_H_ */