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#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 phandle ofw_find_device(const char *name);

extern int ofw_get_property(const phandle device, const char *name, void *buf, const int buflen);