FreeBSD/Linux Kernel Cross Reference
sys/riscv/include/reg.h

     /*-
      * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
      * All rights reserved.
      *
      * Portions of this software were developed by SRI International and the
      * University of Cambridge Computer Laboratory under DARPA/AFRL contract
      * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
      *
      * Portions of this software were developed by the University of Cambridge
     * Computer Laboratory as part of the CTSRD Project, with support from the
     * UK Higher Education Innovation Fund (HEIF).
     *
     * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR 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: releng/11.2/sys/riscv/include/reg.h 292407 2015-12-17 18:44:30Z br $
     */
    
    #ifndef _MACHINE_REG_H_
    #define _MACHINE_REG_H_
    
    struct reg {
            uint64_t ra;            /* return address */
            uint64_t sp;            /* stack pointer */
            uint64_t gp;            /* global pointer */
            uint64_t tp;            /* thread pointer */
            uint64_t t[7];          /* temporaries */
            uint64_t s[12];         /* saved registers */
            uint64_t a[8];          /* function arguments */
            uint64_t sepc;          /* exception program counter */
            uint64_t sstatus;       /* status register */
    };
    
    struct fpreg {
            int dummy;
    };
    
    struct dbreg {
            int dummy;
    };
    
    #ifdef _KERNEL
    /*
     * XXX these interfaces are MI, so they should be declared in a MI place.
     */
    int     fill_regs(struct thread *, struct reg *);
    int     set_regs(struct thread *, struct reg *);
    int     fill_fpregs(struct thread *, struct fpreg *);
    int     set_fpregs(struct thread *, struct fpreg *);
    int     fill_dbregs(struct thread *, struct dbreg *);
    int     set_dbregs(struct thread *, struct dbreg *);
    #endif
    
    #endif /* !_MACHINE_REG_H_ */

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