FreeBSD/Linux Kernel Cross Reference
sys/powerpc/include/rtas.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2011 Nathan Whitehorn
      * 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.
     *
     * 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.
     *
     * $FreeBSD$
     */
    
    #ifndef _MACHINE_RTAS_H_
    #define _MACHINE_RTAS_H_
    
    #include <sys/cdefs.h>
    #include <sys/types.h>
    #include <dev/ofw/openfirm.h>
    
    /*
     * RTAS functions are defined by 32-bit integer tokens. These vary from
     * system to system, and can be looked up from their standardized names
     * using rtas_token_lookup(). If RTAS is not available, rtas_token_lookup()
     * and rtas_call_method() return -1; this can be checked in advance using
     * rtas_exists(). Otherwise, rtas_call_method() returns one of the RTAS
     * status codes from the bottom of this file.
     */
    
    int rtas_exists(void);
    int rtas_call_method(cell_t token, int nargs, int nreturns, ...);
    cell_t rtas_token_lookup(const char *method);
    
    /* RTAS Status Codes: see CHRP or PAPR specification */
    #define RTAS_OK                         0
    #define RTAS_HW_ERROR                   -1
    #define RTAS_BUSY                       -2
    #define RTAS_PARAM_ERROR                -3
    #define RTAS_STATE_CHANGE               -7
    #define RTAS_VENDOR_BEGIN               9000
    #define RTAS_EXTENDED_DELAY             9900
    #define RTAS_ISOLATION_ERROR            -9000
    #define RTAS_VENDOR_ERROR_BEGIN         -9004
    
    #endif /* _MACHINE_RTAS_H_ */

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