/*-
 * 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 {
        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_ */