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/*
 * Copyright (C) 2005 Martin Decky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 */


#ifndef __OFW_H__
#define __OFW_H__

#define NULL    0
#define MAX_OFW_ARGS    10

typedef __builtin_va_list va_list;

#define va_start(ap, last)      __builtin_va_start(ap, last)
#define va_arg(ap, type)        __builtin_va_arg(ap, type)
#define va_end(ap)          __builtin_va_end(ap)

typedef unsigned int ofw_arg_t;
typedef unsigned int ihandle;
typedef unsigned int phandle;

/** OpenFirmware command structure
 *
 */

typedef struct {
    const char *service;          /**< Command name */
    unsigned int nargs;           /**< Number of in arguments */
    unsigned int nret;            /**< Number of out arguments */
    ofw_arg_t args[MAX_OFW_ARGS]; /**< List of arguments */
} ofw_args_t;

typedef void (*ofw_entry)(ofw_args_t *);

extern void init(void);
extern int ofw_call(const char *service, const int nargs, const int nret, ...);
extern void ofw_write(const char *str, const int len);
extern void ofw_puts(const char *str);
extern void *ofw_claim(const void *addr, const int size, const int align);
extern phandle ofw_find_device(const char *name);
extern int ofw_get_property(const phandle device, const char *name, const void *buf, const int buflen);

#endif