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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.
*/
#include <arch/drivers/ofw.h>
#include <stdarg.h>
ihandle ofw_chosen;
ihandle ofw_stdout;
ofw_entry ofw;
void ofw_init(void)
{
ofw_chosen = ofw_call("finddevice", 1, 1, "/chosen");
if (ofw_chosen == -1)
ofw_done();
if (ofw_call("getprop", 4, 1, ofw_chosen, "stdout", &ofw_stdout, sizeof(ofw_stdout)) <= 0)
ofw_stdout = 0;
}
void ofw_done(void)
{
ofw_call("exit", 0, 0);
cpu_halt();
}
int ofw_call(const char *service, const int nargs, const int nret, ...)
{
va_list list;
struct ofw_args_t args;
int i;
args.service = service;
args.nargs = nargs;
args.nret = nret;
va_start(list, nret);
for (i = 0; i < nargs; i++)
args.args[i] = va_arg(list, ofw_arg_t);
va_end(list);
for (i = 0; i < nret; i++)
args.args[i + nargs] = 0;
ofw(&args);
return args.args[nargs];
}
void ofw_putchar(const char ch)
{
if (ofw_stdout == 0)
return;
ofw_call("write", 3, 1, ofw_stdout, ch, 1);
}
void putchar(const char ch)
{
ofw_putchar(ch);
}