FreeBSD/Linux Kernel Cross Reference
sys/arm/include/pcb.h

     /*      $NetBSD: pcb.h,v 1.10 2003/10/13 21:46:39 scw Exp $     */
     
     /*-
      * SPDX-License-Identifier: BSD-4-Clause
      *
      * Copyright (c) 2001 Matt Thomas <matt@3am-software.com>.
      * Copyright (c) 1994 Mark Brinicombe.
      * 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 the RiscBSD team.
     * 4. The name "RiscBSD" nor the name of the author may be used to
     *    endorse or promote products derived from this software without specific
     *    prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY RISCBSD ``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 RISCBSD OR CONTRIBUTORS 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.
     *
     * $FreeBSD$
     */
    
    #ifndef _MACHINE_PCB_H_
    #define _MACHINE_PCB_H_
    
    #include <machine/frame.h>
    #include <machine/vfp.h>
    
    
    /*
     * WARNING!
     * Keep pcb_regs first for faster access in switch.S
     */
    struct pcb {
            struct switchframe pcb_regs;            /* CPU state */
            u_int   pcb_flags;
    #define PCB_OWNFPU      0x00000001
    #define PCB_NOALIGNFLT  0x00000002
            caddr_t pcb_onfault;                    /* On fault handler */
            vm_offset_t     pcb_pagedir;            /* TTB0 value */
            /*
             * XXX:
             * Variables pcb_pl1vec, pcb_l1vec, pcb_dacr are used solely
             * by old PMAP. Keep them here for PCB binary compatibility
             * between old and new PMAP.
             */
            uint32_t *pcb_pl1vec;                   /* PTR to vector_base L1 entry*/
            uint32_t pcb_l1vec;                     /* Value to stuff on ctx sw */
            u_int   pcb_dacr;                       /* Domain Access Control Reg */
    
            struct vfp_state pcb_vfpstate;          /* VP/NEON state */
            u_int pcb_vfpcpu;                       /* VP/NEON last cpu */
    } __aligned(8); /*
                     * We need the PCB to be aligned on 8 bytes, as we may
                     * access it using ldrd/strd, and ARM ABI require it
                     * to by aligned on 8 bytes.
                     */
    
    /*
     * No additional data for core dumps.
     */
    struct md_coredump {
            int     md_empty;
    };
    
    void    makectx(struct trapframe *tf, struct pcb *pcb);
    
    #ifdef _KERNEL
    
    void    savectx(struct pcb *) __returns_twice;
    #endif  /* _KERNEL */
    
    #endif  /* !_MACHINE_PCB_H_ */

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