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186 decky 1 
/*
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 * Copyright (C) 2005 Martin Decky
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <genarch/ofw/ofw.h>
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#include <arch/asm.h>
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#include <stdarg.h>
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#include <cpu.h>
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#include <arch/types.h>
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ofw_entry ofw;
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phandle ofw_chosen;
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ihandle ofw_stdout;
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void ofw_init(void)
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{
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    ofw_chosen = ofw_find_device("/chosen");
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    if (ofw_chosen == -1)
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        ofw_done();
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    if (ofw_get_property(ofw_chosen, "stdout",  &ofw_stdout, sizeof(ofw_stdout)) <= 0)
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        ofw_stdout = 0;
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}
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void ofw_done(void)
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{
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    (void) ofw_call("exit", 0, 0);
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    cpu_halt();
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}
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__native ofw_call(const char *service, const int nargs, const int nret, ...)
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{
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    va_list list;
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    ofw_args_t args;
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    int i;
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    args.service = service;
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    args.nargs = nargs;
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    args.nret = nret;
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    va_start(list, nret);
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    for (i = 0; i < nargs; i++)
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        args.args[i] = va_arg(list, ofw_arg_t);
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    va_end(list);
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    for (i = 0; i < nret; i++)
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        args.args[i + nargs] = 0;
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    ofw(&args);
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    return args.args[nargs];
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}
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void ofw_putchar(const char ch)
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{
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    if (ofw_stdout == 0)
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        return;
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    (void) ofw_call("write", 3, 1, ofw_stdout, &ch, 1);
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}
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phandle ofw_find_device(const char *name)
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{
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    return (phandle) ofw_call("finddevice", 1, 1, name);
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}
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int ofw_get_property(const phandle device, const char *name, void *buf, const int buflen)
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{
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    return (int) ofw_call("getprop", 4, 1, device, name, buf, buflen);
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}
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void *ofw_claim(const void *addr, const int size, const int align)
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{
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    return (void *) ofw_call("claim", 3, 1, addr, size, align);
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}