FreeBSD/Linux Kernel Cross Reference
sys/powerpc/include/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 $
     * $FreeBSD$
     */
    
    #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 had Altivec initialized */
    #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 */
            struct fpu {
                    union {
    #if _BYTE_ORDER == _BIG_ENDIAN
                            double fpr;
                            uint32_t vsr[4];
    #else
                            uint32_t vsr[4];
                            struct {
                                    double padding;
                                    double fpr;
                            };
    #endif
                    } 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_ */

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